 method for detecting downlink control information, user equipment, apparatus for detecting downlink
专利摘要:
A METHOD FOR DETECTING DOWN LINK CONTROL INFORMATION, A USER EQUIPMENT, AN APPARATUS FOR DETECTING DOWN LINK CONTROL INFORMATION AND THE NETWORK SIDE DEVICE. The present invention discloses a method for detecting downlink control information including: when inter-carrier scheduling is allowed, determining by user equipment (UE) the user-specific search space that monitors a downlink control channel (PDCCH) according to component carrier indices, wherein the component carrier indices include component carrier indices corresponding to various component carriers implementing intercarrier scheduling and being intercarrier scheduling. Likewise, the present invention also provides an apparatus for detecting downlink control information, a user equipment and a network-side device. The present invention also solves the problem of overlapping common search space and user-specific search space in Version 10 and solves the problem of determining a search space for the PDCCH in the situation where intercarrier scheduling is allowed in Version 10. 公开号:BR112012023798B1 申请号:R112012023798-5 申请日:2010-08-23 公开日:2021-05-11 发明作者:Xin Wu；Bo Dai；Ping Zeng；Zhisong Zuo 申请人:Zte Corporation； IPC主号:
专利说明:
TECHNICAL FIELD The present invention relates to the field of communication, and in particular to a method and apparatus for detecting downlink control information. BACKGROUND OF THE STATE OF TECHNIQUE The radio frame in the long term evolution system (LTE) includes frequency division duplex mode (FDD) and time division duplex mode (TDD) frame structures. The frame structure of the FDD mode is shown in Fig. 1, where a 10 ms radio frame is composed of twenty slots with a length of 0.5 ms and numbered from 0 to 19, and slots 2i and 2i+1 form an i subframe with a length of 1 ms. The frame structure of the TDD mode is as shown in Fig. 2, where a 10 ms radio frame is composed of two half frames with a length of 5 ms, each including 5 subframes with a length of 1 ms, and subframe i is defined as 2 slots 2i and 2i+1 with a length of 0.5 ms. In the above two frame structures, relative to the normal cyclic prefix (Normal CP), a slot includes 7 symbols with a length of 66.7 us, where the CP length of the first symbol is 5.21 us, and the CP length of the remaining 6 symbols it is 4.69 us; and with respect to an extended cyclic prefix (Extended CP), a slot includes 6 symbols and the CP length of all symbols is 16.67 us. The version number of LTE corresponds to Version 8 (R8), and the additional version corresponds to the version number of Version 9 (R9), and in relation to the subsequent LTE-Advanced, its version number is Version 10 (R10) . In LTE the following three physical downlink control channels are defined: Physical Format Control Indicator Channel (PCFICH), Physical Hybrid Automatic Relay Request Indicator Channel (PHICH) and Physical Downlink Control Channel (PDCCH ). In that case, the information carried by OCFICH is used to indicate the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols of the PDCCH transmitted in a subframe, where the symbols are sent in the first OFDM symbol of the subframe, and the location its frequency is determined by the system's downlink bandwidth and the cell identity (ID). PHICH is used to carry feedback information about Acknowledgment/Non-Acknowledgement (ACK/NACK) of the uplink transmission data. The number and time frequency location of PHICH can be determined by the system message and the cell ID on a physical transmission channel (PBCH) of a downlink carrier where the PHICH is located. PDCCH is used to carry downlink control information (DCI), including uplink scheduling information, downlink scheduling information, and uplink power control information. The DCI formats are divided into: DCI format 0, DCI format 1, DCI IA format, DCI 1B format, DCI 1C format, DCI 1D format, DCI 2 format, DCI 2A format, DCI 3 format, DCI 3A format, etc . , wherein: DCI format 0 is used to indicate the uplink shared channel (PUSCH) scheduling; DCI 1 format, DCI IA format, DCI 1B format, DCI 1C format, DCI 1D format are used for different scheduling modes of a PDSCH codeword; DCI 2 format, DCI 2A format, and DCI 2B format are used for different spatial division multiplexing modes; DCI 3 format and DCI 3A format are used for different physical uplink control channel (PUCCH) modes and PUSCH power control instructions. In this case, for different bandwidths, the dimension of the information domain of each DCI format is shown in Table 1: Table 1 The physical resources transmitted by the physical downlink control channel are found in the control channel element unit (CCE), the size of a CCE is nine resource element groups (REG), i.e. 36 elements of resource, and a PDCCH can occupy 1, 2, 3, 4 or 8 CCE. As for the size of these four types of PDCCH occupying 1, 2, 3, 4 or 8 CCE, tree aggregation is used, that is, the PDCCH occupying 1 CCE can start from any CCE location; PDCCH occupying 2 CCE starts from an even CCE location; the PDCCH occupying 4 CCE starts from the CCE location which is an integral multiple of 4; and the PDCCH occupying 8 CCE starts from the CCE location which is an integral multiple of 8. Each aggregation level defines a search space, including common search space and user-specific equipment search space (UE-Specific). The number of CCEs of the entire search space is determined by the number of OFDM symbols occupied by the control area indicated by PCFICH in each downlink subframe and the number of PHICH groups. The UE carries out blind detection at all possible PDCCH code rates according to the DCI formats of the transmission modes in the search space. In subframe kth, the control domain carrying PDCCH is made up of a group of CCE NCCE, k numbered from 0 to NCCE, k -1- The UE shall detect a group of PDCCH candidates in each non-discontinuous receive subframe (not -DRX) in order to acquire control information, and detection refers to decoding PDCCH in the group according to all DCI formats to be detected. The PDCCH candidates to be detected are defined in the form of search space, and in relation to the aggregation level Lü { 1, 2, 4, 8} , the search space Sk(L) is defined by a group of PDCCH candidates. The CCE that corresponds to candidate PDCCH m in search space Sk{L} is defined in the following formula: where i=0,..., Ll, m=0,..., M(L)-1, is the number of PDCCH candidates to be detected in the SkL} search space. With respect to the common search space, Yk=Q, L takes the values of 4 and 8. With respect to the UE-specific search space, L takes the values of 1, 2, 4, and 8. Yk = (A-Yk_ })modD t £ = K/2| II Where Y.^n^^, A=39827, D=65537, L sl J , LJ represents a rounding, and ns is a slot number in a radio frame. ΠRNTI is the corresponding temporary radio network identifier (RNTI). The UE shall detect each of the common search spaces with aggregation levels of 4 and 8 and each of the UE-specific search spaces with aggregation levels of 1, 2, 4 and 8, and the common search spaces and UE-specific search spaces can be overlapped. The detection times and the corresponding search spaces are shown in table 2: Search space Number of PDCCH candidates Type Aggregation level L Size [in CCE] UE-specific 1 6 6 1 1 2 1 12 J 6 . 4 8 2 1 Table 2 The UE is configured to receive the PDSCH data transmission according to the PDCCH instruction of the UE-specific search space based on one of the following transmission modes semi-static through a higher level signaling: Mode 1: Single antenna port; port 0 Mode 2: Transmit diversity Mode 3: Open loop spatial multiplexing Mode 4: Closed loop spatial multiplexing Mode 5: Multi-user Multi-Input Multi-Output (Multi-user MIMO) Mode 6: Closed loop Level = 1 pre -Mode 7 encoding: Single antenna port; door 5 If the UE is configured by the upper level to decode the PDCCH using the Cyclic Redundancy Check (CRC) encoded by the Temporary Cell Radio Network Identifier (C-RNTI), then the UE shall decode the PDCCH and all relevant PDSCH accordingly with the corresponding combination defined in Table 3: Table 3 If the UE is configured by the upper level to decode the PDCCH using the CRC encoded by the semi-persistently scheduled cellular radio network temporary identifier (SPS C-RNTI), then the UE shall decode the PDSCH and all relevant PDSCH according to the corresponding combination defined in Table 4: Table 4 If the UE is configured by the upper level to decode the PDCCH using the CRC encoded by the cellular radio network temporary identifier by power control transmission (TPC-PUCCH-RNTI), then the UE shall decode the PDCCH according to the corresponding combination defined in table 5: Table 5 If the UE is configured by the upper level to decode the PDCCH using the CRC encoded by the uplink shared channel cellular radio network temporary identifier by power control transmission (TPC-PUSCH-RNTI), then the UE shall decode the PDCCH according to the corresponding combination defined in Table 6: Table 6 Since the LTE-Advanced network has to be able to be accessed by LTE users, its operating frequency band has to cover the current LTE frequency band. There is no longer any 100 MHZ frequency spectrum bandwidth that can be allocated in this band, so a straightforward technique to be solved by LTE-Advanced is to aggregate several continuous component carriers (frequency spectrum) distributed over different ranges of frequency using carrier aggregation technology to form a 100 MHz bandwidth that can be used by LTE-Advanced. That is, with respect to the aggregated frequency spectrum, this is divided into n component carrier frequencies (frequency spectrum), and the frequency spectrum at each component carrier frequency (frequency spectrum) is continuous. 3GPP is defined in the carrier aggregation scenario and can schedule multiple component carriers in the form of component carrier scheduling, that is, it can monitor downlink control channels (PDCCH) of other component carriers on a certain carrier. component. Then, it is necessary to add a carrier indicator field (CIF) in the downlink control information format (DCI format) to determine the monitored PDCCH of each component carrier. For different bandwidths, the size of the information domain of each DCI format after CIF has been added there is as shown in table 7: Table 7 At the 60th congress on 3GPP RAN1 physical layer it was decided not to add any CIF to the common search space for DCI 0 format and DCI IA format, but CIF can be added to the user-specific search space. It can be seen in tables 1 and 7 that under different bandwidths, the size of the information domain of DCI 0 format and DCI IA format without CIF are added and that of the information domain of a certain or some certain DCI formats with CIF that are added can be the same, and thus, the overlapping portion of the common search space and the user-specific search space will have one or more DCI formats with the same information domain size, which will affect PDCCH monitoring . However, there is still no method to solve this problem in the related state of the art, which makes its application inconvenient. At the same time, by allowing scheduling through carriers, the search space for component carriers can be expanded, and in relation to how to expand the search space, there is still no clear solution to solve this problem, making its application is inconvenient. CONTENT OF THE INVENTION The technical problem to be solved by the present invention is to provide a method and apparatus for detecting downlink control information, in order to solve the overlapping problem of common search space and user specific search space in Version 10, solving the blocking rate issue in scheduling across carriers situation being allowed in Version 10. In order to solve the above problem, the present invention provides a method for detecting downlink control information, comprising: when scheduling via carriers is allowed, a search space can be determined by a user equipment specific user that monitors a physical downlink control channel (PDCCH) in accordance with component carrier indices, wherein the component carrier indices comprise component carrier indices corresponding to various component carriers implementing intercarrier scheduling and being scheduled between carriers. Relative positions are fixed between start positions of user-specific search spaces corresponding to various component carriers implementing intercarrier scheduling and being intercarrier scheduling. The step of determining by a user equipment a user-specific search space by monitoring a physical downlink control channel according to component carrier indices comprises: determining a control channel element (CCE) corresponding to a candidate PDCCH m in the user-specific search space according to the following formula: where 1=0,..., Ll, n =0,..., M(L)-1, M(L) is the number of PDCCH candidates to be detected in the search space Sk(L), IA/2J; LJ represents a rounding, ns is a time slot number in a radio frame, Yi=nRNTI¥:0 , A=39827, D=65537, URNTI θ a corresponding temporary radio network identifier, NCCEI k is the number of CCE of a PDCCH control domain carried by the kth subframe, and f(L, I) is a function with the input therein being component carrier index I and aggregation level L. f(L, L or 1 , where N is a multiple of L. Within different subframes, the ways of generating user-specific search spaces corresponding to various component carriers implementing carrier-to-carrier scheduling and being carrier-to-carrier schedule are different from each other. The step of determining by a user equipment a user-specific search space by monitoring a physical downlink control channel according to component carrier indices comprises: determining a control channel element (CCE) corresponding to the candidate PDCCH m in the user-specific search space according to the following formula: where 1 = 0,..., Ll, m=0,..., M(L)-1, M(L) is the number of PDCCH candidates to be detected in the search space, V.^nROTj/ 0, A=39827, D=65537, L s/J, LJ represents a rounding, ns is the time slot number in a radio frame, is a corresponding temporary radio network identifier, NCCEI K is the number of CCE of a PDCCH control domain carried by the kth subframe, and f(T) is a function with the input therein being the I-component carrier index. The initial configurations generated by user-specific search spaces corresponding to various component carriers implementing carrier-to-carrier scheduling and being carrier-to-carrier schedule are different from each other. The step of determining by a user equipment a search space that monitors a physical downlink control channel according to component carrier indices comprises: determining a control channel element (CCE) corresponding to a PDCCH candidate m in the user-specific search space Sk(L} according to the following formula: where í = 0,..., Ll, m=0,..., M(L)-1, MIL) is the number of PDCCH candidates to be detected in the search space Sk{L}, A=39827 , D=65537, L^/^J, LJ represents a rounding, ns is a time slot number in a radio frame, is a corresponding temporary radio network identifier, NCCE, k θ the CCE number of a PDCCH control domain carried by the kth subframe, and f(T) is a function with the input therein being component carrier index I. f(T)=216-T The component carrier indices of various component carriers are configured according to the following way: setting the component carrier index of the component carrier implementing intercarrier scheduling as designated value, and configuring the component carrier indices of the various carriers the remaining components being scheduled between carriers sequentially following the designated high to low or low to high according to their frequency point locations, with the designated value being 0; or, configuring the component carrier indices of the various component carriers implementing intercarrier scheduling and being intercarrier scheduling from high to low or from low to high according to their frequency point locations; or, randomly configuring component carrier indices for the various component carriers implementing intercarrier scheduling and being intercarrier scheduling; or, configuring component carrier indices according to carrier indication domains corresponding to the various component carriers implementing intercarrier scheduling and being intercarrier scheduling. Before the step of determining by a user equipment of a user-specific search space that monitors a PDCCH according to component carrier indices, the method further comprises: the evaluation by the user equipment on whether there are at least two continuous component carriers with their bands being less than or equal to a designated frequency bandwidth after being aggregated into component carriers implementing scheduling between carriers and being scheduled between carriers, if so, then the user equipment does not determine the space of user-specific fetching that monitors the PDCCH according to component carrier indices; and if not, then the user equipment determines the user-specific search space which monitors the PDCCH according to the component carrier indices. When intercarrier scheduling is allowed, on component carriers implementing intercarrier scheduling, the common search space when the user equipment monitors the PDCCH is N times of the common search space corresponding to the component carriers implementing intercarrier scheduling, where N is not greater than a sum of the number of component carriers implementing cross-carrier scheduling and the number of component carriers being scheduled cross-carrier. When the sizes of the information domains of the downlink control information formats configured on the component carriers implementing scheduling between carriers and component carriers being scheduled between carriers are different, after the step of determining by means of a user equipment a space specific search engine monitoring a physical downlink control channel according to component carrier indices, the method further comprises: monitoring the PDCCH via the user equipment for the various component carriers in an independent search space of the various component carriers. When the sizes of information domains of downlink control information formats configured on component carriers implementing scheduling between carriers and component carriers being scheduled between carriers are the same, after the step of determining by means of a user equipment a user-specific search space monitoring a physical downlink control channel according to component carrier indices, the method further comprises: monitoring the PDCCH via the user equipment for the various component carriers in a search space shared, with the shared search space including search space constituted by the search spaces of the various component carriers. When intercarrier scheduling is allowed, if the information domain size of a downlink control information format (DCI format) under a user-specific search space condition is the same as the DCI format under a space condition search engine, and the DCI format under the user-specific search space condition and the DCI format under the common search space condition use the same cyclic redundancy checksum encoded by a temporary radio network identifier, the PDCCH monitoring is carried out only in accordance with the DCI format of the common search space, or the PDCCH monitoring is carried out only in accordance with the DCI format of the user-specific search space. In order to solve the above problem, the present invention also provides a method for detecting downlink control information, comprising: when inter-carrier scheduling is allowed, if the information domain size of a control information format link (DCI format) under a user-specific search space condition is the same as the DCI format under a common search space condition, and the DCI format under the user-specific search space condition and the DCI format under the condition of common search space use the same cyclic redundancy checksum encoded by the same temporary radio network identifier, adding bits to the DCI format in the user-specific search space so that the information domain of the DCI format under the condition of user-specific search space is different from the information domain of the DCI format under the condition of common search space; and carrying out the detection of downlink control information by means of the apparatus according to the size of the information domain of the DCI format after bits have been added therein. The step of adding bits comprises one or more zero bits. In order to solve the problem described above, the present invention also provides a user equipment configured to: when inter-carrier scheduling is allowed, determine a user-specific search space that monitors a physical downlink control channel (PDCCH) according to the component carrier indices, wherein the component carrier indices comprise component carrier indices corresponding to a plurality of component carriers implementing intercarrier scheduling and being intercarrier scheduling. The user equipment is configured to determine a channel control element (CCE) corresponding to a PDCCH candidate m in the user-specific search space Sk{L} according to the following formula: where i = 0,..., Ll, m=0,..., M(i)-1, M(L) is the number of PDCCH candidates to be detected in the search space Sk{L}, k = ln/2j II . . . L ' J , LJ represents a rounding, ns and a time slot number in a radio frame, ír-i=nJWri0O, A=39827, D=65537, riRNTi is a corresponding temporary radio network identifier, NCCE, k è The CCE number of a PDCCH control domain carried by the kth subframe, and f (L, I) is a function with the input therein being component carrier index I and aggregation level L. L or 1 , where N and a multiple of L. The user equipment is configured to determine a channel control element (CCE) corresponding to a PDCCH candidate m in the user-specific search space S^(L> according to the following formula: +m)tnod[WCCEJ/£ j} + / "(-1 + /(0) mod D where i = 0,..., Ll, m=0,..., M(L)-1, M(L) is the number of PDCCH candidates to be detected in search space Sfc(L>, Yi=nRNTz7t0, A=39827, D=65537, LJ represents a rounding, n3 is a time slot number in a radio frame, «RNTZ is a match radio network temporary identifier, f(I) is a function with the input therein being component carrier index I, and NCCE, k is the CCE number of a PDCCH control domain carried by the kth subframe. The user equipment is configured to determine a control channel element (CCE) corresponding to a candidate PDCCH m in the user-specific search space Sk{L according to the following formula: where i = 0,..., Ll, π =0,..., M(L)-1, M(L> is the number of PDCCH candidates to be detected in the search space S^(L) , A=39827, D=65537 z L -I represents a rounding, ns is a time slot number in a radio frame, nj^ri is a corresponding radio network temporary identifier, f(T) is a function with the input therein being the I component carrier index, NCCEI K is the CCE number of a PDCCH control domain carried by the kth subframe.f(t)=2U - /. The user equipment is further configured to: receive the component carrier indices of the various configured component carriers as follows: determine the component carrier component carrier index by implementing intercarrier scheduling as a designated value, with the designated value to be 0, and sequentially setting the component carrier indices for the remaining various component carriers being scheduled between carriers subsequently to the designated high to low or low to high according to the frequency point locations therefrom; or, configuring the component carrier indices of the various component carriers by implementing intercarrier scheduling and being intercarrier scheduling from high to low or from low to high according to the frequency point locations therefrom; or, randomly configuring component carrier indices for the various component carriers implementing intercarrier scheduling and being intercarrier scheduling; or, configuring component carrier indices according to carrier indication domains corresponding to the various component carriers implementing intercarrier scheduling and being intercarrier scheduling. The user equipment is further configured to, before determining the search space for PDCCH monitoring in accordance with the component carrier indices, to evaluate whether there are at least two continuous component carriers with bands therefrom being less than or equal to one width of designated frequency band after being aggregated into the component carriers implementing inter-carrier scheduling and being inter-carrier scheduling, and if so, then the user equipment does not determine the search space for monitoring the PDCCH according to the carrier indices of component; and if not, then the user equipment determines the search space for monitoring the PDCCH according to the component carrier indices. When intercarrier scheduling is allowed, on component carriers implementing intercarrier scheduling, a common search space when the user equipment monitors the PDCCH is N times the common search space corresponding to component carriers implementing intercarrier scheduling, where N is not greater than a sum of the number of component carriers implementing cross-carrier scheduling and the number of component carriers being scheduled cross-carrier. The user equipment is further configured for, when the sizes of information domains of the downlink control information formats configured on the component carriers implementing scheduling between carriers and component carriers being scheduled between carriers are different, after having determined the space specific search engine monitoring the physical downlink control channel according to the component carrier indices, carry out PDCCH monitoring on the various component carriers in a search space independent of the various component carriers. The user equipment is further configured for, when the information domain sizes of the downlink control information formats configured on the component carriers implementing scheduling between carriers and component carriers being scheduled between carriers are equal, after having determined the space specific search engine that monitors the physical downlink control channel in accordance with the component carrier indices, carry out PDCCH monitoring on the various component carriers in a shared search space including a search space constituted by search space of the various component carriers. The user equipment is further configured to, when inter-carrier scheduling is allowed, if the information domain size of a downlink control information format (DCI format) under a user-specific search space condition is the even the size of the DCI format under a common search space condition, and the DCI format under the user-specific search space condition and the DCI format under the common search space condition use cyclic redundancy check encoded by the same identifier temporary radio network, to carry out PDCCH monitoring only in accordance with the DCI format of the common search space, or to carry out the PDCCH monitoring only in accordance with the DCI format of the user-specific search space. In order to solve the above problem, the present invention also provides an apparatus for detecting downlink control information, comprising a network side device and a user equipment, wherein: The network-side device is configured to: when inter-carrier scheduling is allowed, if the size of an information domain of a downlink control information format (DCI format) under a user-specific search space condition is the same as the size of the DCI format under a common search space condition, and the DCI format under the user-specific search space condition and the DCI format under the common search space condition use cyclic redundancy check encoded by same radio network temporary identifier, add bits to the DCI format in the user-specific search space so that the DCI format information domain under the user-specific search space condition is different from the DCI format information domain under the condition of common search space,- and The user equipment is configured to carry out detection of downlink control information in accordance with the size of the DCI format information domain after bits have been added therein. The network-side device is configured to add bits as follows: add one or more zero bits. In order to solve the above problem, the present invention also provides a network-side device configured to: when inter-carrier scheduling is allowed, if the size of an information domain of a downlink control information format ( DCI format) under a user-specific search space condition is the same as the information domain of the DCI format under a common search space condition, and the DCI format under the user-specific search space condition and the DCI format under the common search space condition use cyclic redundancy check encoded by the same radio network temporary identifier, add bits to the DCI format in the user-specific search space so that the DCI format information domain under the condition of user-specific search space is different from the DCI format under the condition of common search space and the user equipment carries out information detection. downlink control action according to the size of the DCI format domain after bits have been added there. The network-side device is configured to add bits as follows: add one or more zero bits. In summary, the present invention solves the problem of monitoring the PDCCH on the UE side due to the fact that the size of the DCI format information domain under the user-specific search space condition and the size of the format information domain DCI under common search space condition can be the same when inter-carrier scheduling is allowed in LTE-Advanced carrier aggregation scenario. Furthermore, the problem of how to define the search space for the UE to detect the PDCCH when inter-carrier scheduling is allowed is solved. BRIEF DESCRIPTION OF THE FIGURES FIG. 1 is a schematic diagram of a frame structure of an FDD mode in the related prior art; FIG. 2 is a schematic diagram of a quad structure of a TDD mode in the related prior art; and FIG. 3 is a diagrammatic scheme of a method for detecting downlink control information according to an embodiment of the present invention. Preferred Embodiments of the Present Invention The method and apparatus for detecting downlink control information provided by the present invention are used to manage PDCCH monitoring in the carrier aggregation system. The present invention presents a method for detecting downlink control information and, as shown in Fig. 3, comprises: step 301: when it allows scheduling between carriers, the user equipment (UE) determines a user-specific search space which monitors a physical downlink control channel (PDCCH) in accordance with component carrier indices, wherein the component carrier indices comprise component carrier indices corresponding to various component carriers implementing intercarrier scheduling and being scheduled between carriers. The search space of the PDCCH can be determined in particular according to the following three methods: 1) the relative positions between the initial positions of the user-specific search space corresponding to various component carriers are fixed by implementing intercarrier scheduling and being scheduled between carriers. The user equipment determines the user-specific search space by changing the CCE formula corresponding to a PDCCH candidate in the search space Sk{L} in R8: L • {(^ + m + f(L, Z)) mod |_ATCCEA IL J} + i where 1 = 0,..., Ll, m=0,..., M(L)-1, g θ number of PDCCH candidates to be detected in the search space S^lL >, NCCE, k is the CCE number of a PDCCH control domain carried by the kth subframe, and f(L,I) is a function with the input therein being component-carrier index I and aggregation level L. The definition of f(L, I) can refer to the following formula: -k or ■> ' > , where N is a multiple of L, for example, N is 16. The rest of the drawing is the same as for of LTE Version 8. 2) within different subframes, the ways of generating user-specific search space corresponding to various component carriers implementing intercarrier scheduling and being intercarrier scheduling are different from each other. That is, the user-specific search space can be determined by changing the Yk formula: with respect to the UE-specific search space, L takes the values of 1, 2, 4, and 8. rt=μ(rt .,+/(/))mod£> / k = n /2 I where Yi^n^^O, A=39827, D=65537, L s' J, n3 is a slot number in a frame radio. IRUTI is the corresponding temporary radio network identifier (RNTI). f(I) is a function with the component carrier index I being the input therefrom. The definition of f (T) can refer to the following formula: /(Z) = 216-/ The rest of the drawing is the same as in LTE Version 8. 3) the initial settings generated by the user-specific search space corresponding to several component carriers implementing carrier-to-carrier scheduling and being carrier-to-carrier schedule are different from each other. The method to determine the PDCCH search space can also be performed by changing the formula Y. 1: determining the CCE corresponding to the candidate PDCCH m in the user-specific search space Sk{í) according to the following formula: L • {(Yk + w) m°d L^CCE,* 1L J} +1 With respect to the UE-specific search space, L assumes the values of 1, 2, 4, and 8. n =(X-í;_1)modZ> Yl = nRNTI + /(-O * θ £ = K/2 | where A=39827, D=65537, L sl J , ns and a slot number in a radio frame, is the corresponding RNTI (Radio Network Temporary Identifier) of the user equipment, f (I) is a function with the component-carrier index I being the input therefrom. The definition of f(I) can refer to the following formula: /(7) = 2.6-Z The remaining drawing is the same as for LTE Version 8. In this case, the multi-carrier component carrier indices are configured as follows: setting the component carrier index of the component carrier implementing intercarrier scheduling as assigned value, with assigned value being The e can be represented as 000 when it is represented as a binary, and sequentially setting the component carrier indices of the remaining component carriers being scheduled between carriers subsequently 5 to the designated high to low or low to high value of according to the frequency point locations there; or, configuring the component carrier indices of the various component carriers by implementing scheduling between carriers and being scheduled between 10 carriers from high to low or from low to high according to the frequency point locations therefrom; or, randomly configuring component carrier indices of the various component carriers implementing intercarrier scheduling and being intercarrier scheduling; or, configuring component carrier indices according to carrier indication domains corresponding to the various component carriers implementing intercarrier scheduling and being intercarrier scheduling. For more detailed description in relation to the above-mentioned method for extending the search space of the PDCCH monitoring, this concerns the situation of extending scheduling between carriers, to the I component carrier index corresponding to each component carrier, through the default of component carrier index I corresponding to several component carriers implementing intercarrier scheduling and being intercarrier scheduling, the index corresponding to component carriers implementing intercarrier scheduling can be set to 0, the other component carriers that need to be Scheduled between carriers can be arranged in a large to small order according to the bandwidth size and can also be arranged in a small to large order, varying their value from 1 to 4 . For more detailed description in relation to the above-mentioned method for extending the PDCCH monitoring search spaces, this concerns the situation of enabling inter-carrier scheduling for the I-component-carrier index corresponding to each component-carrier, by defaulting the component carrier index I corresponding to various component carriers implementing intercarrier scheduling and being intercarrier scheduling, these component carriers being arranged in an order of large to small according to bandwidth size, and can also be arranged in an order of small to large, varying their value from 0 to 4. For more detailed description in relation to the above-mentioned method for enlarging the PDCCH monitoring search space, this concerns the situation of enabling inter-carrier scheduling for the I-component-carrier index corresponding to each component-carrier, by defaulting the component carrier index I corresponding to several component carriers implementing intercarrier scheduling and being intercarrier schedule, and the I index is randomly allocated to these component carriers, varying their value from 0 to 4 . For more detailed description in relation to the above-mentioned method for enlarging the PDCCH monitoring search space, this concerns the situation of enabling inter-carrier scheduling, for the I-component-carrier index corresponding to each component-carrier, the index of component carrier I of them can be allocated according to the CIF values corresponding to multiple component carriers implementing intercarrier scheduling and being intercarrier scheduling, varying their value from 0 to 4. For example, if the CIF value is 010, then the I component carrier index is 2. For more detailed description, when intercarrier scheduling is allowed, if the bands of at least two continuous component carriers after aggregation are less than or equal to the designated frequency bandwidth on the component carriers implementing intercarrier and component carrier scheduling being scheduled between carriers, it is not necessary to expand the search space for the UE to monitor the PDCCH, i.e., the user equipment does not determine the user-specific search space for PDCCH monitoring according to the component carrier indices; otherwise, the user equipment determines the user-specific search space for monitoring the PDCCH according to the component carrier indices. Frequency bandwidth is 20MHz, or can be set to other values as needed. Furthermore, when inter-carrier scheduling is allowed, on component carriers implementing inter-carrier scheduling, the common search space when the user equipment monitors the PDCCH is N times the common search space corresponding to the component carriers implementing inter-carrier scheduling. carriers, where N is not greater than the sum of the number of component carriers implementing intercarrier scheduling and the number of component carriers being intercarrier scheduling. When intercarrier scheduling is allowed, if the information domain size of the downlink control information format (DCI format) under the user-specific search space condition is the same as the DCI format under the space condition. common search, and the DCI format under the user-specific search space condition and the DCI format under the common search space condition use Cyclic Redundancy Checksum (CRC) encoded by the same Temporary Radio Network Identifier (RNTI) ), a method of adding bits to the user-specific search space DCI format can be adopted in this situation to make the sizes of the information domains thereafter different. When intercarrier scheduling is allowed, if the size of the information domain of the DCI format under the user-specific search space condition is the same as the DCI format under the common search space condition, and the DCI format under the condition of the user-specific search space and the DCI format under the common search space condition use the same cyclic redundancy checksum (CRC) encoded by the radio network temporary identifier (RNTI), the PDCCH monitoring can only be carried carried out in accordance with the DCI format of the common search space, i.e. in that overlapping search space, if the DCI format is detected, and processing will be carried out only in accordance with the DCI format of the common search space. When intercarrier scheduling is allowed, if the size of the information domain of the DCI format under the user-specific search space condition is the same as the DCI format under the common search space condition, and the DCI format under the condition of the user-specific search space and the DCI format under the common search space condition use the same cyclic redundancy checksum (CRC) encoded by the radio network temporary identifier (RNTI), the PDCCH monitoring can only be carried carried out in accordance with the DCI format of the user-specific search space, i.e. in that overlapping search space, if the DCI format is detected, and processing will be carried out only in accordance with the DCI format of the search space specific user. Form of Achievement I In the LTE-Advanced carrier aggregation scenario, when inter-carrier scheduling is allowed, the blocking rate of UE monitoring can be reduced by enlarging the PDCCH user-specific search space on the component carriers implementing inter-carrier scheduling. Regarding how to expand the PDCCH user-specific search space during intercarrier scheduling, there are the following methods: Method 1: when intercarrier scheduling is allowed, the upper layer will notify the physical layer to schedule which other carriers component on a certain component carrier, that is, the index of which component carrier will be acquired, here the parameter of that index can be set to I, and the range of values is {0, 1, 2, 3, 4} . Then, when intercarrier scheduling is allowed, the PDCCH monitoring user-specific search space can be expanded according to the component carriers to be scheduled and the CCE corresponding to the PDCCH candidate m in the search space Sjc<L) can be defined by the following formula: L • + m + f(L, /)) mod ATCCE * / LJ} + i / where 1=0,..., Ll, m=0,..., M(L )-1, M(L) is the number of PDCCH candidates to be detected in the search space SkIL). f(L, I) is a function with the component carrier index I and aggregation level L being the input therefrom. The definition of f(L,I) can refer to the following formula: f(L,I) = M(L) • I Where the value of N is preferably 16. The rest of the drawing is the same as for the LTE Version 8. Method II: when scheduling between carriers is allowed, the upper layer will notify the physical layer to schedule which other component carriers of a certain component carrier, i.e., the index of which component carrier will be obtained, here, the parameter of this index can be set to I, and the value range is {0, 1, 2, 3, 4}. Then, when inter-carrier scheduling is allowed, the PDCCH monitoring user-specific search space can be expanded according to the component carriers to be scheduled and the CCE corresponding to the PDCCH candidate m in the search space can be defined by the following formula: L • + m) m°d L^VCCE,* 1L J} +* where f=0,..., Ll, M(L)-1, M(L> is the number of PDCCH candidates to be detected in the search space Sk{L) . With respect to the common search space, Yk=Q, L takes the values of 4 and 8. With respect to the user-specific search space, L takes the values of 1, 2, 4, and 8. (-< «- !+/(/)) mod D k = n/2 where Y.^nj^r^O, A=39827, D=65537, L sl J, n3 and a slot number in a radio frame , nmi7i is a corresponding RNTI (Radio Network Temporary Identifier). f(I) is a function with the I-component carrier index being its input. The definition of f (I) can refer to the following formula: /(/) = 216-7 The rest of the drawing is the same as in LTE Version 8. Method III: when intercarrier scheduling is allowed, the upper level will notify the physical layer to schedule which other component carriers in a certain component carrier, ie the index of which component carrier will be acquired, here the parameter of that index can be set to I, and the range of values is {0, 1, 2, 3, 4} . Then, when intercarrier scheduling is allowed, the PDCCH monitoring user-specific search space can be expanded according to the component carriers to be scheduled and the CCE corresponding to the PDCCH candidate m in the search space S^(L> can be defined by the following formula: L • {(Yk + m)mod|_NCC£ k / LJ} + i where i=0,..., Ll, m=0,..., MlL)-1, is the number of PDCCH candidates to be detected in the Sk{L} search space. With respect to the common search space, Yk=0, L takes the values of 4 and 8. With respect to the UE-specific search space, L takes the values of 1, 2, 4, and 8. Yk = (^ - Yk-i) mod D £ = R/2| where Y-i=nJUJTx^0, A=39827, D=65537, L st J , ns and a slot number in a radio frame, n^x is a corresponding RNTI (Radio Network Temporary Identifier). f(I) is a function with the I-component carrier index being its input. The definition of f(T) can refer to the following formula: /(/) = 216-Z The remaining drawing is the same as LTE Version 8. Regarding the above method to expand the PDCCH monitoring user-specific search space , this concerns the problem of the I component carrier index corresponding to each component carrier in the situation where scheduling between carriers is allowed, and there are four methods: Method I: when scheduling between carriers is allowed, the carrier index of component I corresponding to several component carriers implementing the scheduling between carriers and being scheduled between carriers, the index corresponding to the carriers of components implementing scheduling between carriers is set to 0, the other component carriers that need to be scheduled between carriers can be arranged in an order of large to small according to the frequency point immediately after 0, and can also be arranged and m an order of small to large, and their value ranges from 1 to 4. Method II: when intercarrier scheduling is allowed, the component carrier index I corresponding to multiple component carriers implementing intercarrier scheduling and being scheduled between carriers can be predefined, these component carriers can be arranged in an order from large to small according to the frequency point and can also be arranged in an order from small to large, and their value ranges from 0 to 4. Method III: when scheduling between carriers is allowed, the component carrier index I corresponding to multiple component carriers implementing the carrier scheduling and being scheduled between carriers can be predefined, the index I is randomly allocated to these component carriers and their value ranges from 0 to 4. Method IV: when scheduling between carriers is allowed, the carrier index of component I is allocated according to the CIF values corresponding to multiple component carriers implementing cross-carrier scheduling and being scheduled cross-carrier and their value ranges from 0 to 4. For example, if the CIF value is 010, then the carrier index of component I is 2. Embodiment II In the LTE-Advanced carrier aggregation scenario, when inter-carrier scheduling is allowed, the common search space for the UE to monitor PDCCH can be expanded. In particular, on component carriers implementing intercarrier scheduling, the common search space can be expanded several times or only once, according to the number of other carriers scheduled. For example, when a component carrier implementing inter-carrier scheduling can schedule two other component carriers, the UE can monitor the PDCCH in the common search space which is three times its own common search space in that component carrier implementing scheduling between carriers. Form of Achievement III Regarding the LTE -Advanced carrier aggregation scenario of Embodiments I and II, when scheduling between carriers is allowed, in the method that can expand the PDCCH search space in component carriers by implementing carrier scheduling, if the bands if two continuous component carriers after aggregation are less than or equal to 20 MHz in the component carriers implementing inter-carrier scheduling and being inter-carrier scheduling, the search space for the UE to monitor the PDCCH need not be expanded. Embodiment IV In the LTE-Advanced carrier aggregation scenario, when carrier scheduling is allowed, the solution to expand search space described in Embodiments I, II and III is applied in the following two configuration conditions . Configuration I: when the sizes of the information domains of the DCI formats configured in the component carriers implementing inter-carrier scheduling and being inter-carrier scheduling are different, the UE will respectively monitor the PDCCH for the above-mentioned component carriers in its own search space independent. The independent search search space described here refers to the search space corresponding to the above component carrier itself. At the same time, this entire search space belongs to this component carrier implementing intercarrier scheduling. For example, since the A component carrier implementing intercarrier scheduling can schedule the PDCCHs on the X and Y component carriers, X and Y can also refer to the A component carrier itself. Then, when intercarrier scheduling is allowed, the UE carries out the corresponding PDCCH monitoring in the search space corresponding to the X and Y component carriers, respectively, and the search space corresponding to X and Y belongs to the A component carrier. Configuration II: when the sizes of the domains information of the DCI formats configured on the component carriers implementing intercarrier scheduling and being intercarrier scheduling are the same, the UE will monitor the PDCCH for the above component carriers in the common search space. The common search space written here refers to a search space constituted by the search space of the aforementioned component carriers. At the same time, this entire search space belongs to this component carrier implementing intercarrier scheduling. For example, since the A component carrier implementing carrier scheduling can schedule the PDCCHs on the X and Y component carriers, X and Y can also refer to the A component carrier itself. Then, when intercarrier scheduling is allowed, the UE carries out the corresponding PDCCH monitoring in the common search space constituted by the search space corresponding to the X and Y component carriers, respectively, and the search space corresponding to X and Y belongs to the A component carrier. V In the LTE-Advanced carrier aggregation scenario, when scheduling between carriers is allowed, if the size of the DCI format information domain under the user-specific search space condition is the same as the DCI format information domain under the common search space condition, and the DCI format under the user-specific search space condition and the DCI format under the common search space condition use the same cyclic redundancy checksum (CRC) encoded by the temporary identifier of radio network (RNTI), zero bits can be added in such a method to DCI format of the user-specific search space in that situation, so that the sizes of the information domains there are different. For example, when intercarrier scheduling is allowed, CIF need not be added to the common search space DCI format, and CIF needs to be added to the user-specific search space. Assuming that the bandwidth of the component carrier implementing intercarrier scheduling that needs to monitor the common search space is 5 MHz, then the size of the DCI format 0 and DCI IA format information domains of the search space common is 25 bits (see table 1), and the bandwidth of the component carrier scheduled between carriers is 1.4 MHz, furthermore, you need to monitor the DCI IB format in the user-specific search space of that DCI IB format under the 1.4 MHz bandwidth is also 25 bits, after CIF has been added there (see table 7). At that time, 1 zero bit can be added to the DCI 1B format, so that the size of the information domain therein is different from the DCI 0 and IA format of the common search space. Thus, the situation that when the common search space and the specific search space overlap, there are two DCI formats with the same information domain size is avoided. The above method can eliminate the error probability when the UE monitors the PDCCH, since the DCI format with such information domain size is monitored, but which DCI format cannot be reported last, and after the domain size information has changed, the DCI format can be definitively distinguished. Form of Achievement VI In the LTE-Advanced carrier aggregation scenario, when scheduling between carriers is allowed, the size of the DCI format information domain under the user-specific search space condition may be the same as the DCI format information domain under the common search space, when the common search space and the user-specific search space overlap, these DCI formats will not be distinguished. There can be the following two solutions: Method I: when the common search space and the user-specific search space are overlapped, if the size of the DCI format information domain under the common search space to be monitored is the same of the information domain size of the DCI format under the user-specific search space, and the DCI format under the user-specific search space and the DCI format under the common search space condition use the same temporary network identifier of radio to encode the CRC, PDCCH monitoring will be carried out only according to the DCI format in the common search space, i.e., in that overlapping search space, if a DCI format is detected, processing will be carried out only according to the DCI format in the common search space. Method II: when the common search space and the user-specific search space are overlapped, if the size of the DCI format information domain under the common search space to be monitored is the same as the size of the information domain of the DCI format under the user-specific search space, and the DCI format under the user-specific search space, and the DCI format under the common search space condition use the same radio network temporary identifier to encode the CRC, the PDCCH monitoring will be carried out only in accordance with the DCI format in the user-specific search space, i.e. in that overlapping search space, if a DCI format is detected, and processing will be carried out only in accordance with the DCI format in the user-specific search space. Technicians skilled in the field will realize that all or part of the steps in the above method can be performed by means of cable connection program instructions, the program may be stored on a computer-supported storage medium, such as readable memory, or magnetic or optical disk. Alternatively, all or part of the above embodiments may be implemented by means of one or more integrated circuits. Accordingly, the respective module/unit in the above embodiments can be implemented through the use of a functional hardware or software module. As such, the present invention is not limited to any particular combination of hardware or software. The above are only mere particular embodiments of the invention, however, the scope of protection of the present invention is not limited thereto; changes or replacements that can be easily designed by the person skilled in the field within the technical scope disclosed in the present invention shall be covered by the scope of protection of the present invention. As such, the scope of protection of the present invention shall be based on the scope of protection of the claims. INDUSTRIAL APPLICABILITY The present invention solves the problem of UE-side PDCCH monitoring in that the size of the information domain of the DCI format under the condition of user-specific search space and the size of the information domain of the DCI format under the condition of common search space can be the same when inter-carrier scheduling is allowed in LTE-Advanced carrier aggregation scenario. Furthermore, the problem of how to define the search space for the UE to detect the PDCCH when inter-carrier scheduling is allowed is solved.
权利要求:
Claims (22) [0001] 1. METHOD FOR DETECTING DOWNLINK CONTROL INFORMATION, comprising when scheduling via carriers is allowed, whether it is possible to determine by means of a user equipment a user-specific search space that monitors a physical downlink control channel, PDCCH, according to component carrier indices, wherein the component carrier indices include a plurality of component carriers implementing intercarrier scheduling and being intercarrier scheduling; and relative positions are fixed between start positions of user-specific search spaces corresponding to several component carriers implementing intercarrier scheduling and being intercarrier scheduling; characterized in that the step of determining by a user equipment a user-specific search space that monitors a physical downlink control channel according to component carrier indices comprises; determine a control channel element, CCE, corresponding to a candidate PDCCH m in the user-specific search space Sk(L) according to the following formula: [0002] 2. METHOD, according to claim 1 characterized by: N f(L, I) = L ’ I or f (L, I) = M(L) • I, of L. [0003] 3. METHOD, according to claim 1, characterized in that the component carrier indices of several component carriers are configured as follows: defining the component carrier index of the component carrier by implementing intercarrier scheduling as a designated value, and configuring the component carrier indices of the various remaining component carriers being scheduled between carriers sequentially subsequent to the designated high to low or low to high value according to their frequency point locations, with the designated value being 0; or, configuring the component carrier indices of the various component carriers implementing intercarrier scheduling and being intercarrier scheduling from high to low or from low to high according to frequency point locations therefrom; or, randomly configuring component carrier indices for the various component carriers implementing intercarrier scheduling and being intercarrier scheduling; or, configuring component carrier indices according to carrier indication domains corresponding to the various component carriers implementing intercarrier scheduling and being intercarrier scheduling. [0004] 4. METHOD according to claim 1, characterized in that before the step of determining by a user equipment of a user-specific search space that monitors a PDCCH according to the component carrier indices, the method comprises further: the assessment by the user equipment as to whether there are at least two continuous component carriers with their bands being less than or equal to a designated frequency bandwidth after being aggregated into component carriers implementing inter-carrier scheduling and being inter-carrier scheduling , if so, then the user equipment does not determine the user-specific search space by monitoring the PDCCH according to the component carrier indices; and if not, then the user equipment determines the user-specific search space by monitoring the PDCCH according to the component carrier indices. [0005] 5. METHOD, according to claim 1, characterized in that when scheduling between carriers is allowed, in component carriers implementing scheduling between carriers, the common search space when the user equipment monitors the PDCCH is N times the search space corresponding to component carriers implementing intercarrier scheduling, where N is not greater than a sum of the number of component carriers implementing intercarrier scheduling and the number of component carriers being intercarrier scheduling. [0006] 6. METHOD according to claim 1, characterized in that when the sizes of information domains of downlink control information formats configured on component carriers implementing scheduling between carriers and component carriers being scheduled between carriers are different, after the step of determining by a user equipment a user-specific search space that monitors a physical downlink control channel according to component carrier indices, the method further comprises: monitoring PDCCH by the equipment user for the multiple component carriers in a search space independent of the multiple component carriers. [0007] 7. METHOD according to claim 1, characterized in that when the sizes of information domains of downlink control information formats configured on component carriers implementing scheduling between carriers and component carriers being scheduled between carriers are equal, after the step of determining by a user equipment a user-specific search space that monitors a physical downlink control channel according to component carrier indices, the method further comprises: monitoring PDCCH by the equipment user for the multiple component carriers in a shared search space, with the shared space including search space constituted by the search spaces of the multiple component carriers. [0008] 8. METHOD according to claim 1, characterized in that when scheduling between carriers is allowed, if the size of an information domain of a downlink control information format, DCI format, under a search space condition is the same as the size of the DCI format under a common search space condition, and the DCI format under the user specific search space condition and the DCI format under the common search space condition use the same sum of cyclic redundancy control encoded by a radio network temporary identifier, PDCCH monitoring is carried out in accordance with the DCI format of the common search space, or the PDCCH monitoring is carried out only in accordance with the DCI format of the user-specific search space. [0009] 9. METHOD FOR DETECTING DOWNLINK CONTROL INFORMATION, characterized by comprising: when inter-carrier scheduling is allowed, if the information domain size of a downlink control information format, DCI format, under a space condition specific search space is the same as the DCI format under a common search space condition, and the DCI format under the user specific search space condition and the DCI format under the common search space condition use the same sum of cyclic redundancy control coded by the same radio network temporary identifier, add bits to the DCI format in the user-specific search space so that the DCI format information domain under the user-specific search space condition is different of the information domain of the DCI format under the condition of common search space; and carrying out the detection of control information by the downlink equipment according to the size of the information domain of the DCI format after bits have been added therein. [0010] 10. METHOD according to claim 9, characterized in that the step of adding bits comprises adding one or more zero bits. [0011] 11. USER EQUIPMENT, configured to: when inter-carrier scheduling is allowed, determine a user-specific search space that monitors a physical downlink control channel, PDCCH, according to component carrier indices, in which the component carrier indices include multiple component carriers implementing intercarrier scheduling and being intercarrier scheduling; and relative positions are fixed between start positions of user-specific search spaces corresponding to several component carriers implementing intercarrier scheduling and being intercarrier scheduling; characterized in that the step of determining by a user equipment a user-specific search space that monitors a physical downlink control channel according to component carrier indices comprises; determine a control channel element, CCE, corresponding to a candidate PDCCH m in the user-specific search space Sk(L) according to the following formula: [0012] 12. USER EQUIPMENT according to claim 11, characterized in that N f(L,I) = L ’ I or f(L, I) = M(L) ■ I of L. [0013] 13. USER EQUIPMENT according to claim 11, characterized in that the user equipment is further configured to: receive the component carrier indexes of the various component carriers configured as follows: determine the component carrier index of the component implementing intercarrier scheduling as a designated value, with the assigned value being 0, and sequentially configuring the component carrier indices for the various component carriers that remain being scheduled between carriers subsequently to the designated high to low or low a high according to the frequency point locations there; or, configuring the component carrier indices of the various component carriers by implementing intercarrier scheduling and being intercarrier scheduling from high to low or from low to high according to the frequency point locations therefrom; or, randomly configuring component carrier indices for the various component carriers implementing intercarrier scheduling and being intercarrier scheduling; or, configuring component carrier indices according to carrier indication domains corresponding to the various component carriers implementing intercarrier scheduling and being intercarrier scheduling. [0014] 14. USER EQUIPMENT according to claim 11, characterized in that the user equipment is further configured to: before determining the search space for PDCCH monitoring according to the component carrier indices, assess whether there are at least two carriers component carriers with bands therefrom being less than or equal to a designated frequency bandwidth after being aggregated into component carriers implementing carrier-to-carrier scheduling and being carrier-to-carrier schedule, and if so, then the user equipment does not determine the search space for monitoring the PDCCH in accordance with the component carrier indices; and if not, then the user equipment determines the search space for monitoring the PDCCH according to the component carrier indices. [0015] 15. USER EQUIPMENT according to claim 11, characterized in that, when scheduling between carriers is allowed, in component carriers implementing scheduling between carriers, a common search space when the user equipment monitors the PDCCH is N times the common search space corresponding to the component carriers implementing cross-carrier scheduling, where N is not greater than a sum of the number of component carriers implementing cross-carrier scheduling and the number of component carriers being scheduled cross-carrier. [0016] 16. USER EQUIPMENT according to claim 11, characterized in that the user equipment is further configured for: when the sizes of the information domains of the downlink control information formats configured on the component carriers implementing carrier-carrier scheduling of component being scheduled between carriers are different, after having determined the user-specific search space that monitors the physical downlink control channel according to the component carrier indices, carry out PDCCH monitoring on the various carriers. component in a search space independent of the various component carriers. [0017] 17. USER EQUIPMENT according to claim 11, characterized in that the user equipment is further configured for: when the sizes of the information domains of the downlink control information formats configured on the component carriers implementing carrier-carrier scheduling of component being scheduled between carriers are the same, after having determined the user-specific search space that monitors the physical downlink control channel according to the component carrier indices, carry out PDCCH monitoring on the various carriers. component in a shared search space, with the shared search space including a search space constituted by the search space of the various component carriers. [0018] 18. USER EQUIPMENT according to claim 11, characterized in that the user equipment is further configured to: when inter-carrier scheduling is allowed, if the information domain size of a downlink control information format, format DCI, under a user-specific search space condition is the same as the DCI format under a common search space condition, and the DCI format under the user-specific search space condition and the DCI format under the space condition search engines use the same cyclic redundancy check encoded by a temporary radio network identifier, the PDCCH monitoring is carried out only according to the DCI format of the common search space, or the PDCCH monitoring is carried out only according to the DCI format of the user-specific search space. [0019] 19. APPARATUS FOR DETECTING DOWNWARD LINK CONTROL INFORMATION, characterized in that it comprises a device on the network side and a user equipment, in which: the device on the network side is configured for: when scheduling between carriers is allowed, if the size of an information domain of a downlink control information format (DCI format) under a user-specific search space condition is the same as the size of the DCI format under a common search space condition, and the format DCI under user-specific search space condition and DCI format under common search space condition use cyclic redundancy check encoded by the same radio network temporary identifier, add bits to DCI format in user-specific search space such that the information domain of the DCI format under the user-specific search space condition is different from the information domain of the format DCI under the condition of common search space; and the user equipment is configured to: carry out detection of downlink control information in accordance with the size of the DCI format information domain after bits have been added therein. [0020] 20. APPARATUS according to claim 19, characterized in that the apparatus on the network side is configured to add bits as follows: add one or more zero bits. [0021] 21. NETWORK SIDE DEVICE, characterized by being configured for: when inter-carrier scheduling is allowed, if the size of an information domain of a downlink control information format, DCI format, under a space condition of user-specific search is the same as the DCI format under a common search space condition, and the DCI format under the user-specific search space condition and the DCI format under the common search space condition use cyclic redundancy check encoded by the same temporary radio network identifier, add bits to the DCI format in the user-specific search space so that the information domain of the DCI format under the user-specific search space condition is different from the DCI format under the common search space condition and the user equipment carry out downlink control information detection according to the size of the format domain. the DCI after bits have been added there. [0022] 22. DEVICE ON THE NETWORK SIDE, according to claim 21, characterized in that the device on the network side is configured to add bits as follows: add or one plus zero bits.
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同族专利:
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引用文献:
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法律状态:
2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]| 2020-01-21| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]| 2020-03-17| B15K| Others concerning applications: alteration of classification|Free format text: AS CLASSIFICACOES ANTERIORES ERAM: H04W 24/08 , H04W 72/12 Ipc: H04L 5/00 (2006.01), H04W 72/12 (2009.01) | 2021-03-30| B09A| Decision: intention to grant [chapter 9.1 patent gazette]| 2021-05-11| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 11/05/2021, OBSERVADAS AS CONDICOES LEGAIS. |
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申请号 | 申请日 | 专利标题 CN201010154679.1|2010-04-02| CN201010154679.1A|CN101848483B|2010-04-02|The detection method of a kind of Downlink Control Information and device| PCT/CN2010/076248|WO2011120278A1|2010-04-02|2010-08-23|Detection method and detection device of downlink control information| 相关专利
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