method and user equipment for discontinuous receive operation for carrier aggregation

专利摘要:
METHOD AND SYSTEM FOR DISCONTINUOUS RECEPTION OPERATION FOR ADVANCED CARRIER AGGREGATION IN LONG TERM EVOLUTION A method for discontinuous receive operation for carrier aggregation comprises receiving a first set of discontinuous reception parameters for a first carrier and a different set of discontinuous receive parameters for a second carrier, and configure the discontinuous receive parameters on the first carrier and the second carrier.
公开号:BR112012000201B1
申请号:R112012000201-5
申请日:2010-06-15
公开日:2021-05-18
发明作者:Mo-Han Fong；Sean M. Mcbeath；Zhijun Cai；Mark Earnshaw；Youn Hyoung Heo；Yi Yu
申请人:Guangdong Oppo Mobile Telecommunications Corp., Ltd；
IPC主号:

专利说明:

REVELATION FIELD
[001] The present disclosure relates to advanced long-term evolution (LTE-A) and, in particular, to discontinuous reception when carrier aggregation is used in LTE-A. HISTORIC
[002] Discontinuous reception allows the user equipment (UE) to turn off the radio transceiver for various periods to save battery life in the UE. In the Long Term Evolution (LTE) specifications, the UE is allowed to proceed in discontinuous reception (DRX) even when in connected mode. DRX operation is defined for single-carrier operation in LTE Version 8, 3GPP TS 36.321, sections 3.1 and 5.7, the contents of which are incorporated herein by reference.
[003] In LTE Advanced (LTE-A) it is agreed that carrier aggregation may be used to support wider transmission bandwidth for increased potential peak data rates to satisfy the requirements of LTE-A. In carrier aggregation, multiple component carriers are aggregated and they can be allocated in a subframe to a UE. Thus, each component carrier may have a bandwidth of, for example, 20 MHz and a total aggregated system bandwidth of up to 100 MHz. The UE may receive or transmit on multiple component carriers located in the same band and/or carriers located in different bands. For example, one carrier might be located at 2 GHz and a second aggregated carrier might be located at 800 MHz.
[004] An issue arises with the translation of the DRX operation from an LTE Rel-8 carrier system to a multi-carrier LTE-A system. DRX under LTE Rel-8 may be inoperable or ineffective when multiple carriers are used. Two approaches were proposed in the LTE-A forum.
[005] In R2-0929959, “DRX with Carrier Aggregation in LTE-Advanced”, a proposal is described in which different DRX parameters are configured independently for different component carriers and DRX is performed independently for each component carrier. For example, one component carrier might use a short DRX cycle while another component carrier might use only long DRX cycles; or the DRX cycles configured for the different component carriers are completely independent of each other. A problem with this approach is the complexity for the UE to maintain different states or timers for different carriers. There may also be little benefit from having completely independent DRX cycles and timers between carriers. As upper layer traffic is multiplexed across multiple carriers, it is the decision of the Evolved Node B (eNB) scheduler to determine on which carrier an encoded packet should be transmitted.
[006] In a second approach, outlined in R2-092992, “Consideration on DRX”, the DRX operation is only configured on another carrier. Additional component carriers are allocated on a need basis during the “uptime” of the anchor carrier.
[007] However, the above two proposals do not provide details on the allocation and de-allocation of additional component carriers. Nor do they explicitly provide details about the DRX operation of the various carriers. BRIEF DESCRIPTION OF THE DRAWINGS
[008] The present disclosure will be better understood with reference to the drawings, in which:
[009] Figure 1 is a timing diagram that shows the DRX operation of a carrier in LTE REL. 8.
[010] Figure 2 is a timing diagram showing DRX operation on LTE-A where an unassigned carrier has a DRX inactivity timer.
[011] Figure 3 is a timing diagram showing DRX operation on LTE-A where an unassigned carrier does not have any fixed DRX inactivity timer.
[012] Figure 4 is a 6time diagram showing DRX operation in LTE-A where a first unassigned carrier includes a DRX inactivity timer and a second unassigned carrier does not have the DRX inactivity timer.
[013] Figure 5 is a timing diagram showing DRX operation on LTE-A where an unassigned carrier is set to activate upon activation of the associated designated carrier.
[014] Figure 6 is a timing diagram showing DRX operation in LTE-A where an unassigned carrier is set to activate upon activation of the associated designated carrier and further including a DRX inactivity timer.
[015] Figure 7 is a timing diagram showing DRX operation in LTE-A where an unassigned carrier has a fixed On Duration timer value.
[016] Figure 8 is a timing diagram showing DRX operation on LTE-A where an unassigned carrier has a fixed On Duration timer value and where the On Duration timer value is longer than the active time on the associated designated carrier.
[017] Figure 9 is a timing diagram showing DRX operation in LTE-A where an unassigned carrier has a fixed On Duration timer value and a fixed DRX inactivity timer value.
[018] Figure 10 is a timing diagram showing DRX operation in LTE-A where an unassigned carrier has a fixed drx-FollowDesignatedTimer timer value.
[019] Figure 11 is a timing diagram showing an unassigned carrier configured with a short DRX cycle and a long DRX cycle.
[020] Figure 12 is a block diagram illustrating a media access control (MAC) control element (CE) for enabling or disabling bearer reception on an unassigned bearer.
[021] Figure 13 is a block diagram illustrating a MAC CE to confirm the MAC CE of Figure 12.
[022] Fig. 14 is a block diagram illustrating a MAC CE to enable or disable carrier reception on multiple unassigned downlink carriers.
[023] Figure 15 is a block diagram illustrating a MAC CE to confirm the MAC CE of Figure 14.
[024] Figure 16 is a block diagram illustrating a MAC CE configured to enable or disable multiple ports on downlink and uplink.
[025] Figure 17 is a block diagram illustrating a MAC CE to confirm the MAC CE of Figure 16.
[026] Figure 18 is a block diagram of an exemplary mobile device capable of being used with the versions described herein.
[027] Figure 19 is a data flow diagram that shows the configuration of candidate carriers. AND
[028] Figure 20 is a data flow diagram showing the configuration of control information for a carrier and the stopping of transmission of a disabled carrier. DETAILED DESCRIPTION
[029] According to an aspect, a method for discontinuous receive operation for carrier aggregation is provided, comprising: receiving a first set of discontinuous receive parameters for a first carrier and a limited or different set of parameters for discontinuous reception for a second carrier; and configuring discontinuous reception parameters on the first carrier and the second carrier.
[030] According to another aspect, a method is provided for enabling or disabling carrier reception through media control element signaling comprising: adding a command control element to enable or disable carrier reception; and configuring an acknowledgment control element to enable or disable carrier reception.
[031] DRX operation can be used for different purposes. For example, a UE that is currently experiencing a low level of traffic activity could be in a DRX state where it occasionally wakes up from DRX to receive traffic. An example of this could be that the UE is making a voice call. The voice packets have a predictable pattern of occurrence and do not need to be transmitted in every subframe, so the UE could be configured to spend time between successive voice packet transmissions/receptions on the DRX. Another example would be a UE that is essentially unoccupied currently and does not have any traffic. The UE needs to wake up temporarily to see if the eNB has any traffic to the UE.
[032] The DRX could also be used for resource sharing purposes. It is unlikely that a particular UE would transmit and/or receive data in each subframe on a sustained basis. Thus, for reasons of signaling efficiency, it might be more desirable to consolidate data into fewer and larger resource allocations if the additional latency can be tolerated. This latency would generally be minimal.
[033] For example, it may be more efficient to send a burst of 1000 bytes in a subframe, every 10 subframes, instead of 10 transmissions of 100 bytes through each of those same 10 subframes. Due to the shared nature of packet data channels, other UEs could use the data channels during subframes where the on-screen UE is not receiving or transmitting. The UE could therefore be configured to join the DRX when the eNB knows that it would not transmit to the UE. The eNB would be transmitting to other UEs in these subframes.
[034] As will be appreciated by those skilled in the technology, there are different lengths of the DRX cycle, such as 10 milliseconds for the long DRX cycle and 2, 3, 8 and 10 milliseconds for the short DRX cycles, so that the use of the functionality DRX for data channel sharing purposes may be possible. Furthermore, multiple UEs can be configured with the same DRX cycle length, but at different initial setbacks. This would result in different sets of UEs waking up during different time intervals, thus facilitating time splitting between multiple UEs.
[035] Reference is now made to Figure 1, which shows the operation of LTE Rel-8. In Figure 1, Active 110 mode is illustrated in a first level and DRX 112 mode is illustrated in a second level. During Active 110 mode, the UE monitors the downlink control channel for possible resource allocation on downlink or uplink traffic channels. On one occasion, illustrated by reference numeral 120, a boundary of a DR cycle is encountered. At this point, the mode switches from DRX 112 mode to Active 110 mode. In addition, an OnDuration timer is started. The OnDuration 122 timer means the duration that the UE should remain in Active mode even if there is no transmit traffic to/from the UE during this duration.
[036] In the example of Figure 1, within the Active mode, the arrow 130 shows the message of the last physical downlink control channel (PDCCH) is received, indicating a new transmission packet in the physical downlink shared channel (PDSCH) ) or uplink grant for re-transmission of packet on physical uplink shared channel (PUSCH). At this point, the DRX 132 inactivity timer starts. DRX inactivity timer 132 specifies the number of consecutive PDCCH subframes after the most recent successful decoding of a PDCCH indicating an initial uplink or downlink user data transmission to the UE. As will be appreciated by those skilled in the art, in the example of Figure 1, the UE remains in Active 110 mode until the expiration of a DRX inactivity timer 132. The expiration of the DRX inactivity timer 132 is shown by arrow 134, at which point the UE transitions to DRX 112 mode.
[037] The total duration between the time shown by reference number 120 and arrow 134 is referred to as Active 136 time. Active 136 time is related to DRX operation as defined in sub-clause 5.7 of the DRX LTE specification Rel-8 in the 3GPP TS 36,321 standard, and defines the subframes during which the UE monitors the PDCCH.
[038] The last sent data packet, shown by arrow 130, may expect a hybrid auto-repeat request (HARQ) retransmission. The first point at which HARQ retransmission can be expected is shown by arrow 140. At this point if a HARQ retransmission is required by the UE, a DRX retransmission timer 142 is started during which period the DRX retransmission expires in 143. When will the timer DRX inactivity timer is running or the DRX retransmission timer is running, the UE remains in Active time.
[039] As will be appreciated, based on the above, the Active 136 time can therefore potentially be extended by data activity, which could result in the DRX inactivity timer being reset. Also, if HARQ retransmission is expected for a previously transmitted PDSCH packet, the corresponding DRX retransmission timer is started, causing the Active time to be extended.
[040] If the UE is configured for a short DRX cycle, a new Active 110 mode is initiated at the end of the short DRX cycle, as illustrated by arrow 150 in Figure 1. Arrow 150 shows the DRX cycle that specifies the periodic repetition of the OnDuration, followed by a period of possible downtime.
[041] It is also possible to have a long DRX cycle 152 as shown in Figure 1. In general, a long DRX cycle 152 is more than the short DRX cycle, and both can be configured by the eNB.
[042] The UE can be configured by Radio Resource Control (RRC) with DRX functionality that controls the PDCCH monitoring activity of the UE to the Cell Radio Network Temporary Identifier (C=RNTI = Temporary Network Identifier of Cell Radio), Transmit Power Control Physical Uplink Control Channel RNTI (TPC-PUCCH_RNTI = Control Channel on Uplink Physical Uplink of Uplink Power Control), Transmit Power Control Physical Uplink Shared Channel RNTI (TPC-PUSCH_RNTI = Control Channel on the Shared Channel Physical Uplink RNTI) and semi-persistent scheduling C-RNTI (SPS C-RNTI) (if configured). When in RCC_CONNECTED, if DRX is set, the UE is allowed to monitor the PDCCH discontinuously using the DRX operation specified by sub-clause 6.8 of the 3GPP TS 36.321 specification of LTE Rel-8. Otherwise, the UE monitors the PDCCH continuously. When using DRX operation, the UE also monitors the PDCCH according to the requirements found in other sub-clauses of the specification. The RCC controls DRX operation by setting the following: OnDuration timer, DRX-InactivityTimer, DRX-Retransmission Timer (one per HARQ DL process except for the irradiation process), the value of DRX Start Offset, which is the subframe where the DRX cycle starts, and optionally the DRX Short Cycle Timer and the Short DRX-Cycle. A HARQ retransmission timer (RTT) parameter, which specifies the minimum number of subframes before downlink HARQ retransmission is expected from the UE, is also defined by the downlink HARQ process.
[043] Section 5.7 of the 4GPP TR 25.321 specification of LTE Rel.8 provides the above as:
[044] When the DRX cycle is set, Active Time includes the time when: i. onDurationTimer or drx-InactivityTimer or drx-RetransmissionTimer or Mac-ContentionResolutionTimer (as described in sub-clause 5.1,5) is processing. Or ii. a Scheduling Request sent in the PUCCH is pending (as described in sub-clause 5.4.4); or iii. an uplink grant for an outstanding HARQ retransmission may occur and there is data in the corresponding HARQ buffer; or iv. a PDCCH indicating a new transmission addressed to the C-RNTI of the UE was not received upon successful reception of a Random Access Response for the explicitly signaled preamble (as described in sub-clause 5,1,4).
[045] When the DRX is configured, the UE shall, for each subframe:
[046] if Short DRX Cycle is used and [(SFN*10)+subframe number]module(LongDRX-Cycle)= drxStartOffset. i. start the onDurationTimer.
[047] if a HARQ RTT Timer expires in this subframe and the data in the corresponding HARQ process soft buffer has not been successfully encoded: i. start the drx-RetransmissionTimer for the corresponding HARQ process.
[048] if a DRX Command MAC control element is received: i. stop onDurationTimer, ii. stop drx-inactivityTimer.
[049] If drx-inactivityTimer expires or a DRX Command MAC control element is received in the subframe:
[050] If short DRX cycle is set: i. Start or restart drxShortCycleTimer. ii. Use Short DRX Cycle.
[051] Otherwise: i. Use the Long DRX cycle.
[052] If drxShortCycleTimer expires in this subframe: i. Use the long DRX cycle.
[053] During Active Time, for a PDCCH-subframe unless the subframe is mandatory for uplink transmission for UE FDD half-duplex operation and unless the subframe is part of a gap of configured measurement:
[054] monitor the PDCCH;
[055] if the PDCCH indicates a DL broadcast or if a DL designation has been configured for this subframe: i. start the HARQ RTT Timer for the corresponding HARQ process; ii. stop the drx-RetransmissionTimer for the corresponding HARQ process.
[056] if the PDCCH indicates a new transmission (DL or UL): i. start or restart drx-InactivityTimer.
[057] When not in Active Time, CQI/PMI/RI in PUCCH and SRS shall not be reported.
[058] Regardless of whether the UE is monitoring PDCCH or not, the UE receives and transmits HARQ feedback when expected.
[059] NOTE: The UE may optionally choose not to send CQI/PMI/RI reports on PUCCH and/or SRS transmissions for up to 4 sub-frames after a PDCCH that indicates a new transmission (UL or DL) received in the last sub- =frame of active time. The option not to send CQI/PMI/RI reports on PUCCH and/or SRS transmissions is not applicable for subframes where onDurationTimer is processing.
[060] DRX IN LTE-A
[061] In accordance with the present disclosure, various versions for using DRX in LTE-A to support carrier aggregation are provided.
[062] In one version, the UE must have a minimum number of component carriers for which it needs to turn on signal reception while satisfying the traffic requirement. Having completely independent DRX cycles between component carriers assigned to a UE could cause unnecessary complexity and power consumption in the UE. In one version, it is possible to have coordinated DRX cycles between component carriers assigned to a UE.
[063] Several differences between LTE and LTE-A may affect DRX operation and therefore may need to be addressed by LTE-A DRX solutions.
[064] A first difference is that LTE has a downlink carrier and an uplink carrier. Conversely, in LTE-A there may not only be multiple carriers on the downlink and multiple carriers on the uplink, but the number of carriers on the downlink and uplink may be different. There may, therefore, be no direct one-to-one association between downlink and uplink carriers.
[065] As will be appreciated, both LTE feedback and HARQ LTE-A feedback always need to be received and transmitted as expected while the UE is in DRX operation. In the case of LTE-A with carrier aggregation, this implies that corresponding component carriers on downlink and uplink need to be kept Active to receive or transmit this information.
[066] In LTE, resource indications on the PDCCH correspond with either the same downlink carrier or the associated uplink carrier as there is only one carrier in each link direction. In LTE-A, PDCCH signaling on one carrier such as the anchor carrier could be associated with transmissions or receptions on multiple other carriers on the uplink or downlink. As will be appreciated by those in the technology, an "anchor carrier" may also be referred to as a "primary carrier" and a "non-anchor carrier" may also be referred to as a "secondary carrier".
[067] Another distinction between the two is that, as a result of having PDCCH on a carrier associated with receivers on multiple other carriers on the uplink or downlink, a UE expects HARQ retransmissions on only one carrier (eg, carrier non-anchor) may also need to keep receiving a different carrier (eg, anchor carrier) to receive PDCCH information about potential HARQ retransmissions.
[068] Furthermore, an LTE-A UE with multiple aggregated carriers will have a large number of HARQ processes. If any one of the HARQ processes potentially waits for a HARQ retransmission, the UE may be in Active time. Due to the large number of HARQ processes, the probability that the UE is in Active time and consequently the proportion of time spent in Active time may be much higher for LTE-A than for LTE. CARRIER CONFIGURATION
[069] When the UE is in RRC_CONNECTED state, it can be designated N component carriers, where N is greater than or equal to one. One or more of the N component carriers may be designated as designated carriers. In one version, the designated carrier is also an "anchor carrier". The UE enables carrier reception on all N component carriers. The term "carrier reception" is defined such that when carrier reception of a component carrier is enabled for a UE, the UE activates RF reception and/or reception of downlink physical control channels associated with this component carrier and downlink physical data channels on this component carrier. Carrier reception may also be termed signal reception or some other term without departing from the present disclosure. As will be appreciated by those in the art, if carrier reception of a component carrier is disabled for a UE, the UE stops decoding the PDSCH, PDCCH and other control channels associated with this component carrier, regardless of whether the PDCCH is transmitted on the same carrier as the PDSCH resource allocation or on a different carrier. The UE may monitor the PDCCH on only one or more of the designated carriers, on a subset of the N component carriers, or on all of the N component carriers. If the UE detects a PDCCH that designates a PDSCH resource on a particular component carrier, the UE performs baseband demodulation and decoding of the designated PDSCH resource on that component carrier.
[070] The eNB may change the set of N component carriers by adding new component carriers to the set or removing existing component carriers from the set. The eNB may also change one or more of the designated carriers.
[071] The UE can be configured by RCC signaling with DRX functionality that controls the UE carrier reception on one or multiple component carriers. As used herein, the DRX parameters have definitions similar to those defined in LTE Rel-8, and include the onDurationTimer, drx-InactivityTimer, drx-RetransmissionTimer (one per HARQ process on the downlink, except for the irradiation process), the long DRX-Cycle, the value of drxStartOffset and optionally drxShortCycleTimer and shortDRX-Cycle. A downlink HARQ process retransmission timer, except for the radiating process, is also defined. The above is not meant to be limiting and other DRX parameters can also be used for various component carriers including designated carriers.
[072] Unassigned carriers could also have multiple timers and DRX parameters. In one version, unassigned carriers might have timers such as drx-InactivityTimer, drx-RetransmissionTimer, and HARQ RTT Timer (with these last two timers existing for each HARQ process on the downlink). The drx-InactivityTimer can, however, be omitted in several versions, so the only parameters used consist of the drx-RetransmissionTimer and the expiry time parameters of the HARQ RTT Timer. In other versions, there may be a reduced set of DRX parameters for unassigned carriers. Different unassigned carriers may have different reduced sets of DRX parameters. In yet another version, some unassigned carriers may be configured with an integral set of DRX parameters while other unassigned carriers may have the same set of DRX parameters, either integral or reduced. In another version, the eNB only needs to signal a set of parameters for all unassigned carriers. i. DRX parameters are signaled by the eNB to the UE via RRC signaling. The eNB may set the DRX parameters on the designated carriers and M other unassigned component carriers, where M is greater than or equal to 0. These designated carriers and M unassigned component carriers are those that the eNB may potentially instruct o UE to enable carrier reception. In one version, the eNB may instruct the UE to enable carrier reception on a component carrier that is not within the set of designated carriers and M unassigned carriers. In another version, all M unassigned component carriers have the same DRX settings, so only a common signaling is needed instead of M individual parameters. In another version, for a designated carrier or an unassigned carrier where DRX parameters are configured, the eNB can explicitly signal the UE to enable or disable the DRX operation. When DRX operation is enabled for a carrier, the UE performs DRX operation as specified by the DRX parameters. When DRX operation is disabled, the UE remains in Active mode on that carrier if carrier reception on that carrier has previously been enabled.
[073] From the above, the set of N carriers are called Active carriers, while the set of designated carriers and M unassigned carriers on which the DRX parameters are configured can be called DRX-Configured carriers. The set of DRX-Configured carriers and Active carriers may or may not overlap. The Active Carrier Set may also be a subset of the DRX-Configured Carrier Set or vice versa.
[074] In addition to Active carriers and DRX-Configured carriers, the UE may be pre-allocated additional component carriers in which an index of logical carriers is designed to map to a specific physical carrier. The set of carriers into which an index of logical carriers is designated is called candidate carriers. The UE is also signaled, through the eNB's unicast or broadcast signaling, the properties of the candidate carriers which include carrier frequency, bandwidth, support for control channels, etc. The DRX operation can be configured for one or more carriers within the candidate carrier pool. UE reception of a carrier within the set of candidate carriers can be enabled through explicit signaling (e.g. RCC or MAC CE signaling) from the eNB, or implicitly through setting the DRX parameter. This is for the example shown in Figure 19, where eNB 1910 sends a 1930 message to the UE 1920. Message 1930 provides information for the bearer configuration, including a logical bearer index. The carrier can then be configured in UE 1920, as shown by arrow 1940.
[075] In one version, unassigned carriers within the set of M, where M is defined above, are associated with a designated carrier. One or more unassigned carriers may be associated with one of the designated carriers. Association is signaled by the eNB (e.g. via RCC signaling) to the UE. In one version, the eNB signals the DRX parameters and information associated with the UE in the same RRC signaling message. In another version, the association can be implied through a predefined mapping of the logical/physical carrier index from an unassigned carrier to a designated carrier. In yet another version, the association between an undesignated carrier and a designated carrier may be signaled by the eNB using broadcast or multicast signaling (e.g., RRC broadcast or multicast signaling) for multiple UEs in the cell.
[076] In one version, for each of the M unassigned carriers, where M is defined above, carrier reception on that carrier can be activated at the beginning of the OnDuration of the associated designated carrier, or it can be activated during the time Active of the associated designated carrier. Such activation could be through explicit eNB signaling to the UE (eg PDCCH activating signaling), or by some other alternative means.
[077] The two modes can be configured and signaled as through RRC or MAC CE signaling by the eNB to the UE for each of the non-assigned M carriers. In the latter mode, during Active time on the associated designated carrier, the eNB may instruct the UE to activate carrier reception on another component carrier through control signaling. Such signaling may be sent on the associated designated carrier or one of the N component carriers, where N is defined above.
[078] An example of the above is that the UE enables carrier reception on one of the non-assigned M carriers or on a non-carrier within the set of M carriers, if the UE receives a grant or carrier-activated signaling with C -RNTI successfully on one of the N component carriers instead of with SPS C0RNTI, SI-RNTI (System Information RNTI), P-RNTI (Paging RNTI) or TPC RNTI. The action time to activate carrier reception on the unassigned carrier can be implied, such as x number of subframes after receiving the corresponding signal from the eNB, or it can be indicated explicitly in the signaling message. In a specific version, x could be 0.
[079] DRX parameters are signaled by the eNB to the UE through RRC signaling. The eNB may set the DRX parameters on the designated carriers and M other unassigned component carriers, where M is greater than or equal to 0. These designated carriers and M unassigned component carriers are those for which the eNB may potentially instruct the UE to enable carrier reception. In one version, the eNB may instruct the UE to enable carrier reception on a component carrier that is not within the set of designated carriers and M non-designated carriers. In another version, all M unassigned component carriers have the same DRX settings, so only a common signaling is needed instead of M individual parameters. In another version, for a designated carrier or an unassigned carrier on which DRX parameters are configured, the eNB can explicitly signal the UE to enable or disable DRX operation. When DRX operation is enabled for a carrier, the UE performs DRX operation as specified by the DRX parameters. When DRX operation is disabled, the UE remains in Active mode on that carrier if carrier reception on that carrier has previously been enabled.
[080] From the above, the set of N carriers are called Active carriers, while the set of carriers designated M unassigned carriers in which DRX parameters are configured can be called DRX-Configured carriers. The set of DRX-Configured carriers and Active carriers may or may not overlap. The Active Carrier Set may also be a subset of the DRX-Configured Carrier Set or vice versa.
[081] In addition to Active carriers and DRX-Configured carriers, the UE may be pre-allocated additional component carriers in which a logical carrier index is designed to map to a specific physical carrier. The set of carriers to which a logical carrier index is designated is called candidate carriers. The UE is also signaled, through unicast signaling or eNB irradiation, the properties of candidate carriers including carrier frequency, bandwidth, support of control channels, etc. The DRX operation can be configured for one or more carriers within the candidate carrier pool. UE reception of a carrier within the set of candidate carriers can be enabled through explicit signaling (e.g. RCC or MAC CE signaling) from the eNB, or implicitly through setting DRX parameters. This is for the example shown in Figure 19, where eNB 1910 sends a 1930 message to the UE 1920. Message 1930 provides information for the bearer configuration, including a logical bearer index. The carrier can then be configured in UE 1920, as shown by arrow 1940.
[082] In one version, unassigned carriers within the set of M, where M is defined above, are associated with a designated carrier. One or more unassigned carriers may be associated with one of the designated carriers. Association is signaled by the eNB (e.g. via RRC signaling) to the UE. In one version, the eNB signals the DRX parameters and association information to the UE in the same RRC signaling message. In another version, the association can be implied through a predefined mapping of the logical/physical carrier index from an unassigned carrier to a designated carrier. In yet another version, the association between an unassigned carrier and a designated carrier can be signaled by the eNB using broadcast or multicast signaling (e.g., RRC broadcast or multicast signaling) to multiple UEs in the cell.
[083] In one version, for each of the unassigned carriers, where M is defined above, carrier reception on that carrier can be activated at the beginning of the OnDuration of the associated designated carrier, or it can be activated during the Active time of the associated designated carrier. Such activation could be through eNB signaling to the UE (e.g. PDCCH activating signaling), or by some other alternative means.
[084] The two modes can be configured and signaled as via RRC or MAC CE signaling via the eNB to the UE for each of the unassigned M carriers. In the latter mode, during Active time on the associated designated carrier, the eNB may instruct the UE to activate carrier reception on another component carrier through control signaling. Such control signaling may include, but is not limited to, RRC signaling, PDCCH signaling, or MAC CE signaling. The signaling may be sent on the associated designated carrier or one of the N component carriers, where N is defined above.
[085] An example of the above is that the UE enables carrier reception on one of the non-designated M carriers or on a non-carrier within the set of M carriers, if the UE receives a grant or carrier enabled signaling with C- RNTI successfully on one of the N component carriers instead of with SPS C-RNTI, SI-RNTI (System Information RNTI), P-RNTI (Paging RNTI) or TCP RNTI. The action time to activate carrier reception on the unassigned carrier can be implied, such as x number of subframes after receiving the corresponding signal from the eNB, or it can be indicated explicitly in the signaling message. In a specific version, x could be 0.
[086] At the time of action, the UE enters the Active time on the unassigned bearer. It is observed that if carrier reception of certain carrier is disabled, the UE can stop monitoring the PDCCH for this carrier regardless of whether the PDCCH is transmitted on the same carrier as the PDSCH resource allocation or on a different carrier. In one version, if carrier reception of a certain carrier is disabled, the UE can stop monitoring the PDCCH associated with this carrier regardless of whether the associated PDCCH is transmitted on this carrier or on a different carrier.
[087] If the UE is indicated to enable carrier reception on an unassigned carrier, the UE could transmit corresponding control information for this unassigned carrier as the Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI) , Rank Indicator (RI), and Sounding Reference Symbol (SRS) before the time of action on a designated uplink carrier or an uplink carrier that is associated with the unassigned downlink carrier. This, for example, is shown with reference to Figure 20, where the eNB 2010 determines an activation time, as shown by arrow 2030, and provides control information for the carrier configuration, as shown by arrow 2040, to o EU 2020, before the activation time.
[088] Further, when carrier reception of a certain carrier is disabled, the UE may stop transmitting control information on the uplink to the eNB corresponding to that particular carrier. For example, this is shown in Figure 20, where carrier reception is disabled either by signaling, as shown by arrow 2050, or DRX operation for the carrier, as shown by arrow 2055. When carrier reception is disabled, transmission on the carrier is also disabled, as shown by arrow 2060. In one version, uplink control information corresponding to an unassigned carrier is only transmitted to the eNB during the Active time of the unassigned carrier. In another version, the control information contains control information for all or a subset of the N carriers, for example as combined control information. This control information is only transmitted during the Active time of any of the designated carriers through the associated uplink carrier as a "single report for all".
[089] The foregoing is demonstrated with respect to several versions below. These versions are not meant to be limiting, and may be used alone, in conjunction with other versions or various other alternatives that would be apparent to those skilled in the art having regard to the present disclosure are also contemplated. 1. EXPLICIT START, drx-INACTIVITYTIMER INDIVIDUAL
[090] In a first version, carrier reception on a non-assigned carrier is activated during Active time of the designated carrier associated by eNB signaling. The drx-InactivityTimer for the unassigned carrier is started at action time. The drx-InactivityTimer is restarted whenever a new PDSCH packet is received on the unassigned carrier. The drx-RetransmissionTimer is also kept during the Active time of the unassigned carrier. P drx-RetransmissionTimer for the HARQ process is started at the earliest time when retransmission can be expected for a packet transmitted earlier in the corresponding HARQ process.
[091] The drx-RetransmissionTimer for the HARQ process is disabled when a packet is correctly received for the HARQ process or the maximum number of retransmissions has been reached.
[092] UE remains Active time on unassigned bearer when either the drx-InactivityTimer of the bearer or the drx-RetransmissionTimer is processing. At any time during Active time on the unassigned bearer, the eNB may instruct the UE, through the signaling, to disable reception of the bearer on the unassigned bearer.
[093] Carrier reception on carrier is disabled when none of the drx-InactivityTimer and drx-RetransmissionTimers are processing.
[094] Reference is now made to Figure 2. In Figure 2, a designated carrier 200, with which the undesignated carrier 205 is associated, is shown as having similar properties to the carrier of Figure 1. In this particular, reference numbers similar ones are used.
[095] The designated carrier 200 has an On Duration 122, which starts at the time shown as the reference number 120. The UE then receives its last PDCCH message corresponding to a new data transmission on the designated carrier at a time shown by the arrow 130 , at which point drx-InactivityTimer 132 is restarted. Further, after the HARQ retransmission timer for a downlink HARQ process expires, the drx-RetransmissionTimer for the same downlink HARQ process 140 is started. This is the timer during which the UE waits to see if a HARQ retransmission is received.
[096] As shown in Figure 1, drx- InactivityTimer 132 expires at a time shown by arrow 134. This is subsequent to the expiration of drx- RetransmissionTimer 142. At this point, designated carrier 200 proceeds to DRX mode. Active time during which the UE monitors the PDCCH on the designated carrier is shown by arrow 136.
[097] If a short DRX cycle is configured, the designated carrier 200 proceeds back to Active 110 mode after the short DRX cycle 150 expires. Conversely, if a long DRX cycle is configured then the designated carrier 200 proceeds back to Active 110 mode upon expiration of the long DRX cycle 152.
[098] At some point the eNB realizes that there is more data to be sent to the UE and sends a signal to initiate a second (or subsequent) component carrier. An unassigned carrier 205 is initiated as a result of a message shown at arrow 210 to activate carrier reception on a component carrier.
[099] According to the first version, a drx-InactivityTimer is associated with the component carrier. The drx-InactivityTimer can have a pre-configured length or the length of the drx-InactivityTimer can be signaled by the eNB.
[100] Upon receipt of the signal (or corresponding action time) shown by arrow 210, unassigned carrier 205 proceeds to Active mode, i.e. UE activates carrier reception on unassigned carrier 205. During Active mode, the last new PDSCH packet is received on the unassigned carrier, as shown by arrow 220. At this point the drx-InactivityTimer 222 is restarted. Also started after the HAR RTT time is drx-RetransmissionTimer 224.
[101] In the example in Figure 2, a HARQ retransmission is received and drx-RetransmissionTimer 224 is stopped.
[102] Upon expiry of drx-InactivityTimer 222 the unassigned carrier 205 has its reception disabled, as shown by reference number 230. At this point, the eNB can signal through the associated designated carrier 200 to re-enable reception on the carrier unassigned 205 at some future point. 2. EXPLICIT SIGNALING, NO drx-INACTIVITYTIMER
[103] In another version, carrier reception on an unassigned carrier is enabled during Active time of the associated designated carrier by eNB signaling. A separate drx-InactivityTimer is not maintained for an unassigned carrier. At the time of action, the UE activates bearer reception on the unassigned bearer designated by the eNB. The UE continues to enable bearer reception on the non-assigned bearer during the Active time of the designated bearer, unless explicit signaling is received from the eNB to instruct the UE to disable reception of the bearer on the non-assigned bearer. As the HARQ retransmission process occurs independently between the associated designated carrier and each of the unassigned carriers, each of these carriers maintains its own drx-RetransmissionTimer for each of its HARQ processes on the downlink. In one version, the designated carrier must remain in Active time when the drx-InactivityTimer for the designated carrier or at least one of the drx-RetransmissionTimers for the designated carrier for any unassigned carriers associated with the designated carriers is processing. In another version, the designated carrier can go inside the DRX even if one or more of the drx-RetransmissionTimers of the unassigned carriers associated with the designated carriers are still processing.
[104] Reference is now made to Figure 3. In Figure 3, the designated carrier 200 with which the unassigned carrier 305 is associated is similar to the designated carrier 200 of Figure 2.
[105] Unassigned carrier 305 associated with designated carrier 200 only has one drx-RetransmissionTimer configured for each of its downlink HARQ processes.
[106] As illustrated in Figure 3, explicit signaling is sent by the eNB to the UE to instruct the UE to activate the unassigned carrier 305. This is shown by arrow 310. The unassigned carrier then enters Active time for a period which is determined either by the Active 136 time of the associated designated carrier 200, or as indicated above, may be determined by a drx-RetransmissionTimer.
[107] Assuming that no drx-RetransmissionTimers are processing, at 1345 the designated carrier 200 moves into the DRX. At the same time, the UE disables reception on the unassigned bearer 305.
[108] In a second Active period, the UE receives eNB signaling to the non-assigned carrier 305 to enable reception, as shown by 320. reception is subsequently disabled by explicit eNB signaling to the UE, as shown by the arrow 322. 3. MIXING VERSIONS FIGURE 2 AND FIGURE 3
[109] Reference is now made to Figure 4. The DRX operation described in Figure 2 and Figure 3 above may occur at different times for the same UE, on the same or different unassigned carriers. When the eNB signals the UE to enable bearer reception for an unassigned bearer, the eNB can indicate to the UE whether to keep the drx-InactivityTimer for that unassigned bearer. In one version, if the eNB tells the UE to keep the drx-InactivityTimer, the DRX operation described with respect to Figure 2 above follows. Otherwise, the DRX operation described with reference to Figure 3 above follows. In other versions, the signaling could be reversed, and the drx-InactivityTimer could be used unless the explicit signaling indicates otherwise.
[110] Figure 4 shows signaling in which two unassigned carriers are activated. Namely, the unassigned carrier 205 is activated with the message shown by arrow 210. In the message of arrow 210, the eNB signals that a drx-InactivityTimer should be used. This signaling, for example, can be indicated with a single bit flag. In other versions, the flag might include a value for drx-InactivityTimeri. Another sign that drx-InactivityTimer should be used is possible.
[111] Based on the message from arrow 210, unassigned bearer 205 proceeds as indicated above with respect to Figure 2. Upon expiration of drx-InactivityTimer 222, unassigned bearer 205 proceeds to disable reception as shown in reference number 230.
[112] Similarly, the unassigned carrier 305 is signaled to activate, as shown by reference number 310. The signaling does not provide a drx-InactivityTimer or an indication that the drx-InactivityTimer should be used. In this regard, the Active time of the unassigned carrier 305 shortens the Active time 136 of the associated designated carrier 200. An exception might occur if the drx-RetransmissionTimer is processing.
[113] Similarly, explicit signaling to enable reception on unassigned carrier 305 may be provided as illustrated by arrow 320 and explicit signaling to disable reception on unassigned carrier 305 may also be provided, as shown by arrow 322. 4. INHERENT ACTIVATION
[114] In another version, at the start of On Duration on the designated bearer, the UE activates bearer reception on an unassigned bearer associated with the bearer designated by the eNB. The UE continues to enable carrier reception on the unassigned carrier during the Active time of the associated designated carrier, unless explicit signaling is received from the eNB to instruct the UE to disable carrier reception on the unassigned carrier.
[115] As the HARQ retransmission process occurs independently between the designated carrier and the unassigned carrier, each of the carriers maintains its own drx-RetransmissionTimers for each of its HARQ processes. The designated carrier remains Active time when the drx-InactivityTimer for the designated carrier or at least one of the DRX retransmission timers for the designated carrier or for any unassigned carriers associated with the designated carrier is processing.
[116] Reference is now made to Figure 5. In Figure 5, the designated carrier 200 with which the unassigned carrier 505 is associated is similar to the designated carrier 200 described above with reference to Figures 2 to 4.
[117] With respect to unassigned carrier 505, at a time illustrated by 510, which corresponds to the time illustrated by reference numeral 120, the active time for unassigned carrier 505 begins. Similarly, when drx-InactivityTimer 132 expires as shown by arrow 134, unassigned carrier 505 also proceeds to DRX, as shown by reference number 512.
[118] Subsequently, at the expiration of the short DRX cycle 150, both the designated carrier 200 and the unassigned carrier 505 associated with the designated carrier 200 proceed to Active time, as shown in reference number 520.
[119] In the example of Figure 5, an explicit signaling from the eNB to the UE, as provided by arrow 522, causes the UE to disable reception on the unassigned carrier and proceed to DRX. However, in one version of Figure 5, the next Active time cycle on designated carrier 200 also causes unassigned carrier 505 associated with designated carrier 200 to proceed to Active time.
[120] As indicated above, Active 136 time may be extended based on a drx-RetransmissionTimer processing on unassigned carrier 505. 5. INHERENT ACTIVATION, INACTIVITY TIMER
[121] In another version, similar to the version described above with respect to Figure 5, at the beginning of the On Duration of the designated carrier, the UE activates the reception of the carrier on an unassigned carrier associated with the carrier designated by the eNB. In some versions, carrier reception on multiple unassigned carriers associated with the designated carrier may be enabled.
[122] In addition, the drx-InactivityTimer is kept for the unassigned carrier. The drx-InactivityTimer is started when carrier reception of the unassigned carrier is activated at the start of the On Duration of the associated designated carrier. The drx-InactivityTimer is restarted whenever a new PDSCH packet is received on the unassigned carrier. A drx-RetransmissionTimer is also maintained during the Active time of the unassigned carrier. The drx- RetransmissionTimer for the HARQ process is started at the earliest time when a retransmission can be expected for a packet transmitted earlier in the corresponding HARQ process. The drx-RetransmissionTimer for the HARQ process is disabled when the packet is correctly received for the process or the maximum number of retr5transmissions has been reached.
[123] Unassigned carrier remains in Active time when either drx-InactivityTimer or drx-RetransmissionTimer is processing. At any time during Active time on the unassigned bearer, the eNB may instruct the UE via signaling to disable reception of the bearer on the unassigned bearer.
[124] In one release, the designated carrier may delay the offset of an Active time for DRX until all DRX idle timers and retransmit timers have expired on the unassigned carriers associated with the designated carrier.
[125] Referring to Figure 6, the designated carrier 200 with which the non-designated carrier 605 is associated is similar to the designated carriers described above.
[126] Unassigned carrier 605 is activated at On Duration 122 of associated designated carrier 200. Specifically, as shown in reference number 610, the Active time starts at the same time 120 as the associated designated carrier 200.
[127] The drx-InactivityTimer 622 for the unassigned carrier is reset when the last new PDSCH packet is received on that unassigned carrier as shown by arrow 620.
[128] Upon expiration of drx-InactivityTimer 622, the unassigned carrier 605 proceeds to an Active time in conjunction with the expiration of the short DRX 150 cycle of the associated designated carrier 200.
[129] An explicit message 642 is received from the eNB, causing the unassigned carrier 605 to disable reception. However, in one release, a subsequent On Duration on the associated designated carrier 200 causes the unassigned carrier 605 to proceed to an Active time.
[130] The drx-RetransmissionTimer 624 can also be used to extend the Active time of the unassigned carrier 605. 6. SPECIFICATION OF AN ON DURATION TIMER FOR UNASSIGNED CARRIERS
[131] In another version, the eNB may signal an On Duration timer to a non-assigned carrier for the UE through RRC or MAC CE signaling or other signaling methods. OnDurationTimer is an addition to drx-RetransmissionTimers.
[132] Similar to the version described with reference to Figure 5 above, at the start of On Duration on the associated designated carrier, the UE activates carrier reception on an unassigned carrier designated by the eNB. UE also starts OnDurationTimer at this time.
[133] Drx-RetransmissionTimers are also held for the Active time of the unassigned carrier. The drx- RetransmissionTimer for the HARQ process is started at the earliest time when a retransmission can be expected for a packet transmitted earlier in the corresponding HARQ process. The drx-RetransmissionTimer for the HARQ process is disabled when a packet is correctly received for this HARQ process or the maximum number of retransmissions has been reached.
[134] The UE remains in Active time for the unassigned bearer when the OnDurationTimer is processing and when the associated designated bearer is in Active time or when a drx-RetransmissionTimer is processing for the unassigned bearer. In another version, the UE remains in Active time for the unassigned carrier when the OnDurationTimer is processing or when a drx-RetransmissionTimer is processing, regardless of whether the associated designated carrier is in Active time or not. Furthermore, in one version, the eNB may instruct the UE through signaling to disable reception of the bearer on the unassigned bearer at any time during the Active time of the unassigned bearer.
[135] Referring to Figure 7, the designated carrier 200 with which the non-designated carrier 705 is associated is similar to the designated carrier 200 described above.
[136] An unassigned 705 carrier follows the Active time activation of the associated designated carrier. Thus, as shown by reference numeral 710, unassigned carrier 705 proceeds to an active mode similar to that shown by reference numeral 120 for associated designated carrier 200.
[137] In Version 7 of Figure 7, the OnDurationTimer 720 expires at a time shown by reference number 722. At this point, the UE disables reception on the unassigned carrier 705.
[138] Receive is activated on the unassigned carrier 705 at a time shown by reference number 730 which corresponds to the end of the short DRX cycle 150 when the associated designated carrier 200 proceeds back into Active mode as shown by the number of reference 110.
[139] Subsequently, an explicit signal is received to disable unassigned carrier 705. The explicit signal is shown by arrow 732, causing unassigned carrier 705 to disable reception.
[140] Reference is made to Figure 8. In an alternative version, the OnDurationTimer 820 in Figure 8 is set to be for a relatively long period.
[141] In the version of Figure 8, the unassigned carrier 705 proceeds within an Active time at a time 710. This corresponds to activating the associated designated carrier 200 for an Active time as shown by reference number 120.
[142] However, as opposed to the version of Figure 7, the OnDurationTimer 820 does not expire in the version of Figure 8 before the associated designated carrier 200 proceeds back into DRX mode at the end of Active 136 time. In this case, the UE disables the reception of non-assigned carrier 705 at a time shown by reference number 822 which corresponds with the end of Active 136 time of associated designated carrier 200.
[143] The remaining points in Figure 8 correspond with those in Figure 7.
[144] Thus, according to the above versions, the OnDurationTimer may force the UE to disable reception of the unassigned carrier 705 before the Active 136 time of the associated designated carrier 200 expires. Conversely, if the Active 136 time of the associated designated carrier 200 expires before the expiration of the OnDurationTimer 820 of the non-designated carrier 705, this may cause the UE to disable reception on the non-designated carrier 705. 7. ONDURATIONTIMER AND DRX SIGNALING -INACTIVITYTIMER
[145] In another version, the eNB can signal an OnDurationTimer to the unassigned carrier for the UE through RRC signaling, a MAC CE or other signaling, in addition to the drx-RetransmissionTimer and the drx=InactivityTimer. Similar to Figure 8 above, at the start of On Duration on the associated designated carrier, the UE activates carrier reception on an unassigned carrier designated by the eNB. UE also starts OnDurationTimer and drx-InactivityTimer at this time.
[146] The drx-InactivityTimer is restarted whenever a new PDSCH packet is received on the unassigned carrier. Drx-RetransmissionTimers are also kept during Active time of unassigned carrier. The drx-RetransmissionTimer for the HARQ process is started at the earliest time when retransmission can be expected for a packet transmitted earlier in the corresponding HARQ process. The drx- RetransmissionTimer for the HARQ process is disabled when a packet is correctly received for the HARQ process or the maximum number of retransmissions is reached.
[147] UE remains Active time on unassigned carrier when OnDurationTimer is processing and associated designated carrier is Active time, or drx-InactivityTimer is processing or a drx-RetransmissionTimer is processing. In another version, the UE remains in Active time for the unassigned carrier when the OnDurationTimer is processing or the drx-InactivityTimer is processing or a drx-RetransmissionTimer is processing, regardless of whether the associated designated carrier is in Active time or not.
[148] At any time during Active time on the non-assigned bearer, the eNB may instruct the UE through signaling to disable carrier reception on the non-assigned bearer.
[149] Reference is now made to Figure 9. In Figure 9, a designated carrier 200 with which the unassigned carrier 905 is associated is similar to those described above.
[150] With respect to the unassigned carrier 905, the value of the OnDurationTimer 912 is signaled by the eNB to the UE as well as the drx-InactivityTimer 922.
[151] With respect to Figure 9, similarly to that described above with respect to Figure 7, Active 910 time of unassigned carrier 905 can be the value of OnDurationTimer 912. Also, Active 910 time can be extended with based on drx-InactivityTimer 922. When the last PDSCH packet is received as shown by arrow 920, drx-InactivityTimer restarts and continues processing until such time as shown by reference number 930, drx-InactivityTimer expires, at which time point the unassigned carrier 905 proceeds to disable reception.
[152] In other versions, drx-RetransmissionTimer 924 may extend Active 910 time.
[153] The OnDurationTimer 912 is refined and the unassigned carrier 905 proceeds to an Active time in one hour shown by reference number 940, which corresponds with the end of the short DRX cycle 150 for the associated designated carrier 200. Explicit signaling is provided to the UE to disable the unassigned carrier 905, as represented by arrow 942.
[154] In other versions, Active 136 time in Figure 9 might be increased if drx-InactivityTimer 922 or drx-Retransmission-Timer 924 on unassigned carrier 905 is still processing. Alternatively, unassigned carrier 905 can be forced to disable reception at the end of Active 136 time, regardless of whether drx-InactivityTimer 922 or drx-RetransmissionTimer 924 has expired.
[155] In another alternative version, the Active 910 time of the unassigned carrier 905 may exceed the Active 136 time of the associated designated carrier 200. 8. drx-FollowDesignatedTimer
[156] In another version, the eNB may signal a “drx-FollowDesignatedTimer” to the non-assigned bearer for the UE through RRC or MAC CE signaling, or other communication methods. Also, drx-RetransmissionTi9mer may be flagged.
[157] The drx-FollowDesignatedTimer value can be configured “statically” such as via RRC signaling or dynamically via a MAC CE. During Active time on the designated carrier, the eNB may instruct the UE, through signaling, to activate the reception of the carrier on the non-designated carrier associated with the designated carrier at a specific action time. For the case of the dynamic configuration of drx-FollowDesignatedTimer, the signaling to enable bearer reception of the unassigned bearer includes the drx-FollowDesignatedTimer value. At action time, the UE starts the drx-FollowDesignatedTimer.
[158] Drx-RetransmissionTimers are also kept during the Active time of the unassigned carrier. The drx- RetransmissionTimer for a HARQ process is started at the earliest time when retransmission can be expected for a packet transmitted earlier in the corresponding HARQ process. The drx-RetransmissionTimer for an HARQ process is disabled when the packet is correctly received for the HARQ process or the maximum number of retransmissions has been reached. When drx-FollowDesignatedTimer is processing, the UE only remains in Active time on the unassigned carrier when the associated designated carrier is in Active time or when a drx-RetransmissionTimer is processing. When the drx-FollowDesignatedTimer is expired, and if the drx-RetransmissionTimer has also expired, the UE disables bearer reception on the unassigned bearer regardless of the Active time of the associated designated bearer.
[159] In a specific version, the drx-FollowDesignatedTimer is several Long DRX cycles or Short DRX cycles and then carrier reception on unassigned carrier will be disabled.
[160] Reference is now made to Figure 10. In Figure 10, the designated carrier 200 with which the undesignated carrier 1005 is associated is similar to that described above.
[161] Explicit signaling 1008 provides the start for unassigned carrier 1005.
[162] Unassigned carrier 1005 follows associated designated carrier 200 for the time when drx-FollowDesignatedTimer 1020 is Active. Thus, at the time shown by reference numeral 1010, unassigned carrier 1005 proceeds to Active mode and at the time shown by reference numeral 1022, unassigned carrier 1005 proceeds to DRX mode or when reception is disabled. This time shown by reference number 1022 corresponds with the expiration of drx-InactivityTimer 132 on the associated designated carrier 200.
[163] Similarly, at the expiration of the short DRX cycle 150 in the example in Figure 10, the unassigned carrier 1005 proceeds back to Active time, as shown in reference number 1030.
[164] Upon expiration of drx-FollowDesignatedTimer 1020, unassigned carrier 1005 disables reception until another explicit signal is received.
[165] In some versions, drx-FollowDesignatedTimer 1020 can be used in conjunction with drx-InactivityTimer.
[166] The LTE Rel 8 specification, such as 3GPP TS 36,321 may be supplemented to account for the versions described above. Examples of these additions to the specification for the designated carrier could be:
[167] When a DRX cycle is configured on the designated carrier, Active Time includes the time when: i. onDurationTimerDC or drx-InactivityTimerDC or drx-RetransmissionTimerDC or Mac-ContentionResolutionTimerDC (as described in sub-clause 5.1.5) is processing; or ii. a Scheduling Request sent on the PUCCH of any UL bearer assigned to the UE is pending (as described in sub-clause 5.4.4); or iii. an uplink grant/DL ACK/NAK on PHICH for an outstanding HARQ retransmission on any UL bearer assigned to the UE [or an UL bearer whose grant/DL ACK/NAK on PHICH may appear in the DL of the designated carrier] may occur and does data in the corresponding HARQ buffer; or iv. a PDCCH indicating a new transmission addressed to the C-RNTI of the UE was not received upon successful reception of a Random Access Response for the explicitly signaled preamble (as described in sub-clause 5.1.4); or V. drx-InactivityTimeri or drx-RetransmissionTimeri is processing on at least one of the unassigned DL carriers associated with the designated carrier; or an uplink/DL ACK/NAK grant on the PHICH for an outstanding HARQ retransmission on an UL carrier, which grant may appear on any of the unassigned DL carriers associated with the designated carrier, may occur and there is data in the HARQ buffer corresponding.
[168] When DRX is configured on the designated carrier, the UE shall, for each subframe: i. If Short DRX Cycle is used and [(SFN * 10) + subframe number] modulo (shortDRX-CycleDC) = drxStartOffsetDC: ii. Start onDurationTimerDC. iii. If a HARQ RTT TIMER expires in this subframe and the data in the corresponding HARQ process soft buffer was not successfully decoded: iv. Start drx-RetransmissionTimerDC for the corresponding HARQ process.
[169] If a DRX Command MAC control element is received: i. Stop onDurationTimerDC: ii. Stop drx-InactivityTimerDC.
[170] If drx-InactivityTimerDC expires or a DRX Command MAC control element is received in this subframe: i. If short DRX cycle is configured: 1. start or restart drxShortCycleTimerDC; 2. use the Short DRX CycleDC. ii. Otherwise: 1. Use Long DRX CycleDC.
[171] If drxShortCycleTimerDC expires in this subframe: 1. Use LongDRXCycleDC.
[172] During Active Time, for a PDCCH subframe unless the subframe is mandatory for uplink transmission for UE FDD half-duplex operation and unless the subframe is part of a measurement gap configured: i. Monitor the PDCCH; ii. If the PDCCH indicates a DL broadcast or if a DL designation has been configured for this subframe: 1. Start the HARQ RTT Timer for the corresponding HARQ process; 2. Stop drx-RetransmissionTimerDC for corresponding HARQ process. iii. If the PDCCH indicates a new transmission (DL or UL): 1. Start or restart drx-InactivityTimerDC; iv. When not in Active Time CQI/PMI/RI on PUCCH and SRS. should not be reported.
[173] Regardless of whether or not the UE is monitoring PDCCH, the UE receives and transmits HARQ feedback when expected.
[174] NOTE: The UE may optionally choose not to send CQI/PMI/RI reports on PUCCH and/or SRS transmissions. for up to 4 subframes after a PDCCS indicating a new transmission (UL or DL) received in the last Active Time subframe. The option not to send CQI/PMI/RI reports on PUCCH and/or SRS transmissions is not applicable for subframes where the unassigned bearer is associated, ie mode 1; or it can be activated explicitly during the Active Time of the associated designated carrier, through explicit eNB signaling to the UE, ie mode 2. These two modes can be configured and signaled (eg through RRC signaling) by the eNB to the UE for each of the unassigned M carriers. In mode 2, during Active Time on the designated carrier, the eNB may instruct the UE to activate carrier reception on another non-assigned component carrier (e.g. i carrier) associated with the designated carrier, through control signaling (e.g. , RRC, PDCCH, or MAC control element signaling) sent on the designated carrier or one of the other N component carriers, where N is defined above.
[175] The action time to activate carrier reception on the component carrier can be implicit (eg, x subframes after receiving the corresponding signaling from the eNB) or explicitly indicated in the signaling message. The signaling message can also indicate to the UE whether it keeps drx-InactivityTimeri during Active Time. If drx-FollowDesignatedTimeri is set to an unassigned carrier, the initial activation of the unassigned carrier is using mode 2, that is, through explicit signaling by the eNB during the Active Time of the associated designated carrier. The drx-FollowDesignatedTimer is started at action time. During the time that drx-FollowDesignatedTimer is processing, the unassigned carrier is subsequently activated using mode 1, ie at the start of the On Duration of the associated designated carrier.
[176] When carrier reception on carrier i is enabled either at the start of the On Duration of the associated designated carrier for mode 1 or the action time for mode 2, the UE starts drx-InactivityTimeri if drx-InactivityTimeri is configured and the UE is instructed by the eNB to keep drx-InactivityTimeri during Active Time on carrier i. Otherwise, UE starts activeFlagi and sets it to 1. For mode 1, UE also starts onDurationTimeri if onDurationTimeri is set by eNB. For mode 2, UE starts drx-FollowDesignatedTimeri at action time, if drx-FollowDesignatedTimeri is set by eNB.
[177] The addition to the specification for a non-designated carrier may include:
[178] When a DRX cycle is configured on an unassigned carrier i, the Active Time on carrier i includes the time when: i. drx-RetransmissionTimeri is processing; or ii. drx-InactivityTimeri is processing; or iii. activeFlagi is set to 1, and the associated designated carrier is on Active time; or iv. onDurationTimeri is processing and the associated designated carrier is in Active Time; or V. drx-FollowDesignatedTimeri is processing and the associated designated carrier is in Active Time; I heard. a grant on uplink/DL ACK/NAK on PHICH for a pending HARQ retransmission on an UL carrier, which grant may appear on carrier i, may occur and there is data in the corresponding HARQ buffer.
[179] When the DRX is configured on an unassigned carrier i, the UE shall, for each subframe: i. If a HARQ RTT Timer expires on this subframe and the data in the corresponding HARQ process' soft buffer has not been successfully decoded: 1. Start drx-RetransmissionTimeri for the corresponding HARQ process. ii. If eNB signaling (e.g. RRC signaling or MAC control element i) is received indicating disabling of reception of carrier or component carrier i, iii. Stop drx-InactivityTimeri if drx-InactivityTimeri is set, stop onDurationTimeri if onDurationTimeri is set, stop drx- RetransmissionTimeri, set activeFlagi to 0 if activeFlag is started, stop drx-FollowDesignatedTimeri if drx-FollowDesignatedTimeri is set, at indicated action time in the signage. The action time to disable carrier reception on the i component carrier can be implicit (e.g. y subframes after receiving the corresponding signaling from the eNB) or explicitly indicated in the signaling message. iv. During Active Time, unless the subframe is mandatory for uplink transmission for UE FDD half-duplex operation and unless the subframe is part of a configured measurement gap: v. Enable carrier reception on component carrier i; saw. If a DL broadcast or if a DL assignment has been configured for this subframe: 1. Start the HARQ RTT Timer for the corresponding HARQ process; 2. Stop drx-RetransmissionTimeri for corresponding HARQ process. vii. If a new broadcast is received: 1. Start or restart drx-InactivityTimeri. viii. If drx-FollowDesignatedTimeri expires, set activeFlag to 0 if activeFlagi is initialized. ix. When not in Active Time, CQI/PMI/RI on PUCCH and SRS shall not be reported on carrier i. x. When not in Active Time, onDurationTimeri should be disabled if it has not already expired. SHORT AND LONG DRX CYCLES IN BOTH DESIGNATED AND NON-DESIGNATED CARRIERS
[180] In another version, an integral set of DRX parameters may be configured for both assigned and unassigned carriers. Smart scheduling in the eNB could activate the potential for efficient utilization of the short and long cycles of the DRX on both designated and unassigned carriers.
[181] When the Short DRX cycle is also configured, the UE essentially operates on the Short DRX cycle if it has recently received resource allocations for new data (new data only, no HARQ retransmissions). After a certain period of time with no new data resource allocation having been received, the UE switches to the Long DRX cycle after drxShortCycleTimer has expired. The UE continues to use the Long DRX cycle until another new data resource allocation is received on the PDCCH.
[182] If each unassigned carrier was configured to operate with both Short and Long DRX cycles, then the UE would be able to adapt to bursty traffic scenarios without the need for any explicit signaling. The UE receiving a large amount of data would have all of its carriers (both designated and unassigned) operating with Short DRX cycles. If the data volume decreases, an intelligent eNB would schedule all data for the UE only on the designated carriers. This would cause the designated carriers to continue to operate with the Short DRX cycle, while the unassigned carriers would automatically switch to using the Long DRX cycle after drxShortCycleTimer has expired (as they would not be receiving any new data resource allocations). If the traffic activity to the UE then increased, the unassigned carriers would again start to be used by the eNB DURING O On Duration and these unassigned carriers would automatically switch back to Short DRX cycle mode. The Short DRX cycle and Long DRX cycle boundaries of an unassigned carrier may align with those of the associated designated carriers.
[183] Another extension of the above is that a carrier that has not been used in a certain period of time (eg a configured multiple of the Long DRX cycle length) would automatically (implicitly) be disabled by the UE and would need to be re-enabled by the eNB before being used.
[184] In another version, implicit activation of a carrier in the UE is possible. If the resource assignment for a currently disabled bearer was received by the UE of the associated PDCCH, then that bearer must be immediately reenabled. As would be appreciated, the resource assignment that caused the implicit activation could not be processed, but any future resource assignments on the carrier in question would be able to be processed.
[185] Reference is now made to Figure 11. In Figure 11, a designated carrier 200 operates as described above.
[186] An unassigned carrier 1105 is independently configured with a short DRX cycle 1150 and a long DRX cycle 1152. At the start of data exchange, the unassigned carrier 1105 is configured to use the short DRX cycle. Thus, as illustrated in Figure 11, unassigned carrier 1105 follows designated carrier 200 for active time.
[187] If no data is received on unassigned carrier 1105 for short duration DRX cycle 1150, the unassigned carrier switches to long DRX cycle 1152, as illustrated in Figure 11. In the example in Figure 11, the Long DRX Cycle 1152 is twice the length of the Short DRX Cycle 1150. However, this is not meant to be limiting as the Long DRX Cycle can be any multiple of the Short DRX Cycle. SIGNALING DRX PARAMETER SIGNALING
[188] As described above, the eNB may configure DRX parameters for the assigned carriers and DRX parameters for the set of non-assigned M carriers for the UE. For each of the unassigned M carriers, the DRX parameter set includes drx-RetransmissionTimer, may include drx-InactivityTimer, may include onDurationTimer, and may include drx-FollowDesignatedTimer. For each of the M unassigned bearers, the eNB may configure the designated bearer associated with the unassigned bearer. For each of the M unassigned bearers, the eNB may configure the designated bearer associated with the unassigned bearer. For each of the unassigned M carriers, the eNB may indicate whether the UE shall enable carrier reception on that carrier at the start of the OnDuration of the associated designated carrier, or enable carrier reception on that carrier only if explicit enable signaling is received of the eNB.
[189] In one release, the values of drx-InactivityTimer (if included), onDurationTimer (if included), drx-RetransmissionTimer are the same across all component carriers. In this case, the RRC signaling used to configure DRX functionality does not need to include the drx-InactivityTimer, the onDurationTimer, and the drx-RetransmissionTimer fields for each of the component carriers. The values of the entire set of DRX parameters can be included in the RRC signaling for one of the designated carriers, while the values of the DRX parameters of the other designated carriers, and the drx-InactivityTimer (if included), the onDurationTimer (if included) and the drx -RetransmissionTimer of the other M unassigned component carriers are the same as those of the designated carrier. RRC signaling also includes the drx-FollowDesignatedTimer for those unassigned carriers where the drx-FollowDesignatedTimer is set.
[190] In another release, the values of drx-InactivityTimer (if included), onDurationTimer (if included), drx-RetransmissionTimer, and drx-FollowDesignatedTimer (if included for the unassigned carrier) are different for different component carriers. In this case, RRC signaling includes an integral set of DRX parameters for the designated carriers, and a reduced set of DRX parameters, ie, drx-InactivityTimer (if included), onDurationTimer (if included), drx-RetransmissionTimer, and drx- FollowDesignatedTimer (if included for the unassigned carrier) for each of the M other component carriers.
[191] In yet another version, the drx-InactivityTimer (if included), onDurationTimer (if included), and drx-RetransmissionTimer values of some of the component carriers are the same as those of their associated designated carriers as the values of drx- InactivityTimer (if included), onDurationTimer (if included), and drx-RetransmissionTimer of some other component carriers are different from those of their designated carriers. In this case, RRC signaling includes an integral set of DRX parameters for the designated carriers, a reduced set of DRX parameters, ie, drx-InactivityTimer (if included), onDurationTimer (if included) and drx-RetransmissionTimer for some of the M carriers components, and drx-FollowDesignatedTimer for some of the M component carriers on which drx-FollowDesignatedTimer is configured.
[192] In yet another version, the DRX parameters of all unassigned carriers are set to be the same values. In this case, RRC signaling includes an integral set of DRX parameters for the designated carriers and a reduced set of DRX parameters, ie, drx-InactivityTimer (if included), onDurationTimer (if included), drx-RetransmissionTimer, and drx-FollowDesignatedTimer (if included) for all M other component carriers.
[193] Table 1 below shows an example of the fields included in the corresponding RRC signaling that support the different versions. The signaling and format fields shown are not intended to be limiting. It should be appreciated by those skilled in the technology that other signaling fields and formats are also possible in consideration of the present disclosure are also contemplated.






Table 1; Example of DRX parameters included in RRC signaling eNB SIGNALING TO UE TO ENABLE/DISABLE CARRIER RECEPTION
[194] The eNB can instruct the UE to enable or disable carrier reception on a component carrier, through RRC or MAC CE signaling, or even through certain Downlink Control Information (DIC) formats in the PDCCH (ie, Layer 1 signaling). RRC or MAC CE or PDCCH signaling may be sent on a designated carrier only or on any of the N component carriers, where N is defined above. In the signaling message sent in RRC, MAC CE or PDCCH signaling to enable carrier reception on a component carrier, a field may be included to indicate whether the component carrier is a designated carrier or an unassigned carrier.
[195] Reference is now made to Figure 12. Figure 12 shows an example of 'carrier reception enable/disable command MAC control element' 1200 sent by eNB to UE to enable/disable carrier reception on a carrier, with time of explicit action. The new MAC control element 1200 can use one of the reserved DL LCID values (logical channel) for the DL-SCH (downlink shared channel) shown in Table 6.2.1-1 of 3GPP TS 36.321. ‘DS’ 1205 is a one-bit field to indicate whether the carrier is a designated carrier or an unassigned carrier. ‘L/D’ 1210 is a one-bit field to indicate whether the command should enable or disable carrier reception. ‘Carrier Index’ 1220 is the physical or logical carrier index of the carrier at which carrier reception should be enabled/disabled. If 'L/D' 1210 is set to disable carrier reception, the value of 'DS' 1205 can be set to a predefined value and is ignored by the UE. Another version is that only the carrier on which the ‘carrier reception enable/disable command MAC control element’ 1200 is sent will be impacted by this command. For example, if a MAC CE disabling bearer reception is received on bearer #3, then bearer #3 will disable bearer reception. The action time for when carrier reception on the carrier must be enabled/disabled is defined by the next radio frame with the 4 least significant bits (LSD) of the system frame number (SFN) equal to 'Actem time (LSD of the SFN)' 1230, and the subframe within this radio frame with the subframe number is equal to 'Actem time (subframe offset)' 1240.
[196] Another alternative to action time is to define a relative time setback. Those skilled in the technology will appreciate that in some cases there may be some difficulty in determining a fixed reference time for the relative time setback since MAC CE transmission may involve HARQ retransmissions. One possible way to establish the fixed reference time is that when the HARQ ACK is received at the UL, the eNB can derive that the UE receives the corresponding MAC CE 4 ms earlier, as the HARQ feedback transmission is, in one version, 4 ms after receipt of the corresponding transport block.
[197] The SFN 4 LSB allows up to 16 radio frames or 160 ms HARQ retransmission attempts for the MAC CE to be successfully received at the UE and acknowledged back to the eNB. A MAC CE (referred to as 'MAC ACK control element enable/disable carrier reception') is defined on the uplink (UL) for the UE to acknowledge receipt of the 'carrier reception enable/disable command MAC control element'. The explicit acknowledgment protocol allows the eNB to confirm that the UE has successfully received the 'carrier reception enable/disable command MAC control element' 1200 before sending PDSCH data to the UE on the designated carrier.
[198] In general, control signaling is only acknowledged at the RRC level. However, this particular MAC control signaling has a potentially long-term consequence and is therefore of sufficient importance to have some form of confirmation. RRC signaling is possible, but in some versions it may be too slow for the intended purpose or may incur excessive overhead compared to MAC level signaling proposed here.
[199] Another workaround for acknowledging reception of the 'command MAC control element enable/disable carrier reception' 1200 is to use HARQ feedback. When the transport block containing the MAC CE is transmitted to the UE, the eNB will monitor the corresponding HARD UL feedback. When the corresponding HARQ ACK is received at the UL, the eNB considers that the 'carrier reception enable/disable command MAC control element' 1200 has been successfully received by the UE.
[200] Reference is now made to Figure 13, which shows an example of the 'MAC ACK control element of enabling/disabling carrier reception' 1300. The 'Carrier Index' 1310 is the physical or logical carrier index of the carrier at that the carrier reception enable/disable command is acknowledged. This new MAC CE 1300 can use one of the UL LCID reserved values for the UL-SCH shown in Table 6.2.1.-2 of 3GPP TS 36.321.
[201] Reference is now made to Fig. 14, which provides another example format for a MAC control element used to enable or disable carrier reception on a carrier. Here, binary flags 1410, 1412, 1414 and 1416 are used to selectively enable or disable up to a maximum of four carriers. Fields 1411, 1413, 1415, 1417 are used to indicate whether each of the carriers indicated in 1410, 1412, 1414, 1416, respectively, is a designated carrier or an undesignated carrier. If a CI field is set to disable carrier reception, the corresponding value of the DS field can be set to a predefined value and is ignored by the UE.
[202] As will be appreciated, in a version having one designated carrier and four unassigned carriers, the five carriers may be aggregated with a UE. A carrier is the designated carrier that is currently in Active time, leaving the four unassigned carriers for binary flags 1410, 1412, 1414, and 1416. Yet, in one version, the carrier indices for any unallocated carrier simply would be treated as reserved or filler bits.
[203] For example, a value for binary flag 1410 of 0 would indicate that the corresponding unassigned carrier should be turned off, while a value of 1 would indicate that the corresponding unassigned carrier should be turned on. Similarly, binary flags 1412m 1414 and 1416 could be set. Any carriers that were to remain in their current state would simply have their corresponding binary flags set to the same value as before. For example, if carriers 1 and 2 were currently enabled and carriers 3 and 4 were currently disabled, the binary value of 00001010 for the first byte 1429 of the MAC control element would instruct the UE to (a) keep carrier 1 enabled, (b) deactivate carrier 2, (c) activate carrier 3, and (d) keep carrier 4 deactivated. Action time fields are signaled in the same way as described above.
[204] Figure 15 contains the corresponding example format of a CE acknowledgment MAC 1500 that would acknowledge receipt by the UE of the carrier enable/disable MAC control element shown in Figure 14. The values of binary flags 1510, 1512, 1514 and 1516 corresponding to CI1, CI2, CI3, CI4 are set to the same as the corresponding binary flag values 1410, 1412, 1414 and 1416 previously received in 'carrier reception enable/disable command MAC control element' 1400 of Figure 14.
[205] An advantage of the MAC CE format of Figures 14 and 15 is that multiple carriers can be enabled and/or disabled simultaneously by the same MAC CE, without the need to send multiple MAC control elements (thus representing additional signaling overhead) to achieve the same purpose.
[206] If the ability to selectively enable and disable carriers on the uplink is also desired, the MAC CE discussed above could be extended as shown by MAC control element 1600 in Figure 16 to handle up to a maximum of four carriers on the link downlink and four carriers on the uplink. The one-bit on/off field for each carrier would work in the same way as discussed earlier. In particular, downlink carrier flags 1610, 1612, 1614 and 1616 control four downlink carriers and uplink carrier flags 1620, 1622, 1624 and 1626 control activation/deactivation of four uplink carriers.
[207] Figure 17 shows corresponding MAC CE 1700 format for acknowledging receipt by UE of MAC CE of enabling/disabling carrier 1600 shown in Figure 16. Thus downlink carrier flags 1710, 1712, 1714 and 1716 correspond to downlink carrier flags 1610, 1612, 1614 and 1616 and uplink carrier flags 1720, 1722, 1724 and 1726 correspond to uplink carrier flags 1620, 1622, 1624 and 1626.
[208] As for the MAC set If proposed in Figures 14 and 15, the content of the acknowledgment control element in Figure 17 would mirror the first load byte of the enable/disable control element in Figure 16.
[209] As will be appreciated, the foregoing can be implemented in any EU. An exemplary UE is described below with reference to Figure 18. This is not meant to be limiting, but is provided for illustrative purposes only.
[210] Figure 18 is a block diagram illustrating a UE capable of being used with versions of the apparatus and method of the present application. Mobile device 1800 is typically a two-way wireless communication device having voice or data communication capability. Depending on the exact functionality provided, the wireless device may be referred to as a data messaging device, a two-way radio-calling device, a two-way email device, a mobile phone with data messaging capability, an Internet device. wireless, a mobile device, or a data communication device, as examples.
[211] When the UE 1800 is enabled for two-way communication, it incorporates an 1811 communication subsystem, which includes both an 1812 receiver and an 1814 transmitter, as well as associated components such as one or more antenna elements, usually built-in or internal 1816 and 1818, local oscillators (LOs) 1813, and a processing module such as the digital signal processor (DSP) 1820. As will be apparent to those skilled in the field of communication, the particular design of the 1811 communication subsystem will be network dependent. communication in which the device is intended to operate.
[212] Network access requirements will also vary depending on the type of network 1819. UE LTE may require a subscriber identity card (SIM) module to operate in the LTE or LTE-A network. The SIM 1844 interface is typically similar to a card slot into which a SIM card can be inserted and ejected like a floppy disk or PCMCIA card. The SIM card may contain configuration key 1851, and other 1853 information such as identification, and subscriber related information.
[213] When the necessary registration or network activation procedures have been completed, the UE 1800 can send and receive communication signals over the 1819 network. As illustrated in Figure 18, the 1819 network can consist of multiple communicating antennas with the EU. These antennas are in turn connected to an 1870 eNB.
[214] Signals received by antenna 1816 through communication network 1819 are input to receiver 1812, which can perform common receiver functions such as signal amplification, frequency downconversion, filtering, channel selection and the like, and in the example system shown in Figure 18, analog to digital (A/D) conversion. The A/D conversion of a received signal allows more complex communication functions like demodulation and decoding to be performed on the DSP 1820. Similarly, signals to be transmitted are processed, including modulation and encoding, for example, by the DSP 1820 and input to transmitter 1814 for digital-to-analog conversion, frequency upconversion, filtering, amplification, and transmission over the communication network 1819 through antenna 1818. The DSP 1820 not only processes the communication signals, but also provides receiver control and the transmitter. For example, the gains applied to the communication signals in the receiver 1812 could be adaptively controlled through automatic gain control algorithms implemented in the DSP 1820.
[215] The UE 1800 typically includes an 1838 processor that controls the overall operation of the device. Communication functions, including data and voice communication, are performed through the 1811 communication subsystem. The 1838 processor also interacts with other device subsystems such as the 1822 screen, 1824 flash memory, 1826 random access memory (RAM) , auxiliary input/output (I/O) subsystems 1828, serial port 1830, one or more keyboards or key pads 1832, speaker 1834, microphone 1836, other communication subsystems 1840 such as the short-range communication subsystem and any other device subsystems generally designated as 1842. The 1830 serial port could include a USB port or other port known to those knowledgeable in the technology.
[216] Some of the subsystems shown in Figure 18 perform communication-related functions, while other subsystems may provide “resident” or device-related functions. Notably, some subsystems, such as the 1832 keyboard and the 1822 screen, for example, may be used for both communication-related functions, such as input ceiling message for transmission over a communication network, and resident device functions such as the calculator or to-do list.
[217] The operating system software used by the 1838 processor is generally stored in persistent storage as the 1824 flash memory, which may instead be a read-only memory (ROM) or similar storage element (not shown). Those skilled in the technology will appreciate that the operating system, specific device applications, or parts thereof may be temporarily loaded into a volatile memory such as RAM 1826. The communication signals received may also be stored in RAM 1826.
[218] As shown, the 1824 flash memory can be segregated into different areas for both the 1858 computer programs and the 1850, 1852, 1854, and 1856 program data storage. These different types of storage indicate that each program can allocate one. portion of the 1824 flash memory for your own data storage needs. The 1838 processor, in addition to its functions in the operating system, will be able to enable the execution of software applications in the UE. A predetermined set of applications that control basic operations, including, for example, voice and data communication applications, will typically be installed in the EU 1800 during manufacturing. Other applications could be installed subsequently or dynamically.
[219] A software application may be a personal information manager (PT) that has the ability to organize and manage UE user related data items such as, but not limited to, electronic mail, calendar events, mail voicemail, appointments, and to-do items. Naturally, one or more memory stores would be available in the UE to facilitate the storage of PT data items. This PT application would typically have the ability to send and receive data items over the 1819 wireless network. In one version, the PT data items are finely integrated, synchronized, and updated, over the 1819 wireless network, with the items. corresponding user data of the UE or associated with a host computer system. Other applications may also be loaded into the UE 1800 via network 1819, an auxiliary I/O subsystem 1828, serial port 1830, short range communication subsystem 1840 or any other suitable subsystem 1842, and installed by the user in RAM 1826 or in a non-volatile warehouse (not shown) for execution by the 1838 processor. This flexibility in application installation increases device functionality and may provide enhanced device functionality, communication-related functions, or both. For example, secure communication applications may enable e-commerce functions and other financial transactions thus to be carried out using the UE 1800.
[220] In data communication mode, a received signal such as a text message or a web page download will be processed by communication subsystem 1811 and input to processor 1838, which may further process the received signal for element attributes. for output to the 1822 screen, or alternatively to an 1828 auxiliary I/O device.
[221] The UE 1800 user will also be able to compose data items such as electronic mail messages, for example, using the 1832 keyboard, which may be a full alphanumeric keypad or a telephone-type key pad, as examples, together with the screen 1822 and possibly an auxiliary I/O device 1828. These composite items can then be transmitted over a communication network through the communication subsystem 1811.
[222] For voice communication, the general operation of the UE 1800 is similar, except that the received signals would typically be output to an 1834 speaker and the signals for transmission would be generated by an 1836 microphone, such as the recording subsystem. voice messages, may also be implemented in the UE 1800. Although the voice or audio signal output may be performed primarily through speaker 1834, the screen 1822 may also be used to provide an indication of the identity of the calling party , the duration of a voice call, or other information related to the voice call, for example.
[223] Serial port 1830 in Figure 18 would normally be implemented in a personal digital assistant (PDA) type UE for which synchronization with the user's desktop computer (not shown) might be desirable, but it is a device component. optional. This port 1830 would allow the user to set preferences through an external device or software application and would extend the capabilities of the UE 1800 by providing information or software downloads to the UE 1800 other than via a wireless communication network. The alternative downlink, for example, could be used to load an encryption key into the device via a direct, and thus trusted, connection, and then enable secure device communication. As will be appreciated by those skilled in the technology, serial port 1830 can even be used to connect the UE to a computer to act as a modem.
[224] Other communication subsystems 1840, such as the short-range communication subsystem, is another component that may provide communication between the UE 1800 and different systems or devices, which need not necessarily be similar devices. For example, subsystem 1840 may include an infrared device and associated circuitry and components or a Bluetooth™ communication module to provide communication with similarly enabled systems and devices. Subsystem 1840 may also be used for WiFi or WiMAX communication.
[225] Processor 1838 and communication subsystem 1811 could be used to implement the procedures and features of Figures 1 to 17.
[226] The versions described here are examples of structures, systems or methods having elements corresponding to the elements of the techniques of this application. This written description may enable those skilled in the technology to make and use versions having alternative elements that likewise correspond to the technical elements of this application. The intended scope of the techniques of this application thus includes other structures, systems or methods which do not differ from the techniques of this application as described herein, and further include other structures, systems or methods with insubstantial differences from the techniques of this application as described herein.

权利要求:
Claims (11)
[0001]
1. Method for discontinuous reception operation for carrier aggregation, characterized by comprising: receiving (1930) in a user equipment from a network element a first set of discontinuous reception parameters, DRX, for a first carrier designated and a second limited set of discontinuous reception parameters for a second unassigned carrier associated with the first carrier, the second set being limited to one or both of a DRX sleep timer and a DRX retransmission time; and setting (1940) the discontinuous reception parameters on the first carrier and the second carrier.
[0002]
Method according to claim 1, further comprising disabling reception on the second carrier at the latest of the expiration of the DRX inactivity timer and the DRX retransmission timer.
[0003]
Method according to claim 1 or 2, characterized in that it further comprises disabling reception of the second carrier based on an explicit message from a base station.
[0004]
4. Method according to any one of claims 1 to 3, characterized in that the reception includes using a flag or value for a DRX inactivity timer, in which the first parameter for the flag or the presence of the value indicates that the DRX inactivity timer should be used and a second parameter for the flag or the absence of the value indicates that the DRX inactivity timer should not be used.
[0005]
A method according to any one of claims 1 to 4, characterized in that it further comprises transitioning the second carrier to active time in accordance with the first transition from carrier to active time.
[0006]
A method according to any one of claims 1 to 5, further comprising disabling reception on the second carrier based on transitioning the first carrier from the active time to a discontinuous receive state.
[0007]
Method according to claim 6, characterized in that it further comprises disabling reception on the second carrier upon receipt of an explicit message from a base station.
[0008]
8. The method of claim 6, wherein the second set of parameters for the second carrier includes the DRX inactivity timer, said second carrier disabling reception at the earliest expiration of the DRX inactivity timer and the first carrier transitions to discontinuous receive mode.
[0009]
9. Method according to any one of claims 1 to 8, characterized in that the first carrier extends its active time when the DRX inactivity timer on the second carrier is processing.
[0010]
10. Method according to any one of claims 1 to 9, characterized in that the configuration of a short discontinuous reception cycle and the configuration of a long discontinuous reception cycle are configured for a second carrier, wherein the second carrier can transition from the short discontinuous receive cycle to the long discontinuous receive cycle if no data is received on the second carrier for the duration of the value of the short discontinuous receive timer.
[0011]
11. User equipment (1920) characterized by comprising: a processor; and a communication subsystem, wherein the processor and communication subsystem are configured to cooperate to effect the method defined in any one of claims 1 to 10.

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法律状态:
2017-06-13| B25D| Requested change of name of applicant approved|Owner name: BLACKBERRY LIMITED (CA) |

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2017-07-04| B25G| Requested change of headquarter approved|Owner name: BLACKBERRY LIMITED (CA) |

---

2017-08-01| B25A| Requested transfer of rights approved|Owner name: HILCO PATENT ACQUISITION 55, LLC (US) |

---

2017-08-22| B25A| Requested transfer of rights approved|Owner name: GOLDEN VALLEY HOLDINGS LIMITED (WS) |

---

2018-03-27| B15K| Others concerning applications: alteration of classification|Ipc: H04L 5/00 (2006.01), H04W 52/02 (2009.01), H04W 76 |

---

2018-06-12| B25A| Requested transfer of rights approved|Owner name: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LT |

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2019-01-15| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2020-02-04| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2021-03-02| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

---

2021-05-18| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 15/06/2010, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF |

优先权:

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US18709509P| true| 2009-06-15|2009-06-15|

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US22088609P| true| 2009-06-26|2009-06-26|

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