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    • 专利摘要:
    METHOD AND SYSTEM FOR TRANSMITING POSITION REFERENCE SIGNAL. The present disclosure provides a method and system for transmitting a position reference signal, which includes: obtaining a position reference signal (PRS) sequence currently required with a length of 2XNPRSRB, where N PRSRB is the bandwidth of the PRS configured by high-layer signaling, which is represented by a unit of a resource block; determine the position of the PRS sequence in a physical resource block; and transmitting the PRS sequence obtained at the given position. With the method of the present disclosure, a currently needed PRS sequence is obtained directly, or in principle, a PRS sequence with the maximum extent is generated, and then the currently necessary PRS sequence is intercepted from the PRS sequence with the maximum extent. The present disclosure ensures that an effective PRS sequence can be obtained in any circumstance, thus guaranteeing the performance of the PRS positioning function.
    公开号:BR112012001283B1
    申请号:R112012001283-5
    申请日:2009-12-30
    公开日:2020-12-08
    发明作者:Xun Yang；Bo Dai；Guanghui Yu；Weijun Li
    申请人:Zte Corporation；
    IPC主号:
    专利说明:

    TECHNICAL FIELD
    The present disclosure relates to the field of mobile communications, particularly a method and system for transmitting a position reference signal. BACKGROUND
    An Orthogonal Frequency Division Multiplexing (OFDM) technology is a multi-carrier modulation communication technology in essence and is one of the core technologies for 4-generation mobile communication. In the frequency domain, the OFDM multipath channel is characterized by selective frequency fading. To overcome such fading, a channel is divided into multiple subchannels in the frequency domain, the frequency spectrum characteristic of each subchannel is approximately flat, and each OFDM subchannel is orthogonal to the other. Therefore, overlapping sub-channel frequency spectra is allowed, so that the frequency spectrum feature can be used to the greatest extent.
    A Long Term Evolution (LTE) system is an important program of the 3rd Generation Partner Organization. Figure 1 shows a frame structure under a Frequency Division Duplex (FDD) mode in an LTE system. As shown in Figure 1, a 10 ms ratio frame comprises twenty intervals over a 0.5 ms span, which are numbered No. 0 ~ No. 19. An interval 2i and interval 2i + 1 comprise a subframe i of an extension of lms. When the LTE system uses a subframe with a normal cyclic prefix, a range includes 7 uplink / downlink signals and has an extension of 7 uplink / downlink signals; when the LTE system uses a subframe with an extended cyclic prefix, the slot includes 6 uplink / downlink signals and has an extension of 6 uplink / downlink signals.
    A Resource Element (RE) is a subcarrier in an OFDM symbol. If the LTE system uses a subframe with a normal cyclic prefix, then 12 contiguous subcarriers and 7 contiguous OFDM symbols constitute a Downlink Resource Block (RB); if the LTE system uses a subframe with an extended cyclic prefix, then 12 contiguous subcarriers and 6 contiguous OFDM symbols constitute an RB that is 180kHz in the frequency domain and has a time span of a normal interval in the time domain, as shown in Figure 2. In terms of resource allocation, the resource is allocated by a unit of a resource block.
    The LTE system supports the application of a system of Multiple Inputs and Multiple Outputs of 4 antennas (MIMO), and a corresponding antenna port no. 0, antenna port no. 1, antenna port no. 2 and antenna port no. ° 3 use Full Bandwidth Cell Specific Reference Signals (CRSs). When the cyclic prefix of a subframe is a normal cyclic prefix, the position of a CRS in a physical resource block is shown in Figure 3a; when the cyclic prefix of a subframe is an extended cyclic prefix, the position of the CRS in a physical resource block is shown as in Figure 3b. In addition, there is also a specific reference signal per UE, which is only transmitted at the time and frequency domain position where a UE-specific physical downlink channel (PDSCH) is located, in which the CRS functions include measuring the quality of the downlink channel and estimating (demodulation) of the downlink channel.
    A base station needs to measure the position of an UE in a cell, so that it can carry out configuration and programming of the UE effectively. At present, the CRS is configured to measure the UE, but, due to the semi-aesthetic configuration of the CRS energy, the positioning performance of the UE is limited.
    At present, the solution to the above problem is to perform positioning by transmitting a position reference signal (PRSs), thus to ensure the positioning accuracy of the UE. The PRS transmission cycles are 160ms, 320ms, 640ms and 1280ms, and the numbers of contiguous subframes transmitted with the PRS are 1, 2, 4 and 6. The sequence of
    defined according to the following formula:
    on what
    is an index of an interval
    the PRS bandwidth configured by high-layer signaling. The formula for generating a pseudo-random sequence w is defined as follows:
    x2 is generated according to the initial value of a pseudo-random sequence

    calculated according to the following formula generates a pseudo-random sequence
    of each OFDM symbol:


    The PRS sequence
    is mapped to the complex modulation ak (pl) symbol
    on the antenna port p of the interval ns according to the following formula,
    where k is the index of a subcarrier in the OFDM symbol l.
    When the system's cyclic prefix is normal cyclic:
    on what
    is the maximum downward bandwidth. When the system's cyclic prefix is an extended cyclic prefix:
    on what
    the initial frequency domain position of the PRS in a physical resource block,
    represents rounding down. According to represents the identity of a cell), each radio frame generates a pseudo-random sequence
    and the time and frequency position of a PRS in a physical resource block is as shown in Figure 4a and Figure 4b. Since the PRS ^ shlft initial frequency domain position in the physical resource block is randomly generated, it is not good to reduce the interference of a neighboring cell through cell design.
    Additionally, in the existing solutions, a sequence
    with fixed extension
    generated first when the
    PRS is transmitted, then the sequence of
    is obtained according to the difference in
    However how does the length of the pre-generated sequence determine
    represents the transmitted PRS data and
    shows that
    is obtained from
    so when
    is not equal to 0, m will certainly be beyond the scope of m values, and as a result
    will be negligible and effective PRS sequence data cannot be obtained.
    In ERICSSON ET AL: “Draft CR 36.21”, 3GPP DRAFT; R1- 092854, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTER; 650, ROUTE DES LUCIOLES; F-06921 SOPHIA- ANTIPOLIS CEDEX; FRANCE, no. Los Angeles, UAS; July 7, 2009, the reference signal sequence
    is defined by
    where ns is the slot number within a radio frame, is the number of the OFDM symbol within the slot and NPRSRB is the bandwidth for positioning reference signals configured by higher layers. The pseudo-random sequence generator must be initialized with
    at the beginning of each OFDM symbol, where
    In ERICSSON ET AL: “Remaining issues on OTDOA positioning”, 3GPP DRAFT; R1-092731, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTER; 650, ROUTE DES LUCIOLES; F-06921 SOPHIA-ANTIPOLIS CEDEX; FRANCE, no. Los Angeles, USA; June 24, 2009, the PRS standard and the associated string are addressed. The pseudo-random QPSK sequence used for CRS is defined as follows: the reference signal sequence
    is defined by
    where ns is the slot number within a radio frame, l is the number of the OFDM symbol within the slot. The pseudo-random sequence generator must be initialized with
    each OFDM symbol, where
    In LG ELECTRONICS: “Details on PRS Sequence”, 3GPP DRAFT; R1-092483_LG_PRS_SEQUENCE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTER; 650, ROUTE DES LUCIOLES; F-06921 SOPHIA-ANTIPOLIS CEDEX; FRANCE, no. Los Angeles, USA; June 24, 2009, this contribution provides the discussion and views on the following issues: PRS sequence number in conjunction with PCI; String type PRS; PRS sequence mapping; and PRS sequence frequency. SUMMARY
    The technical problem to be solved by the present disclosure is to provide a method for transmitting a position reference signal to ensure that an effective PRS sequence can be obtained under any circumstances, thus guaranteeing the performance of a PRS positioning function.
    To solve the technical problem mentioned above, the present disclosure provides a method for transmitting a position reference signal, which includes: generating a currently required position reference signal (PRS) sequence with an extension of
    , where NPRS
    RB is the PRS bandwidth configured by high-layer signaling, and represented by the unit of a resource block; determine a position of the PRS sequence in a physical resource block; and transmitting the PRS sequence obtained at the given position.
    The PRS sequence with the extension of 2XNPRSRB can be represented by

    where ns is an index of an interval in a radio frame, l is the index of an OFDM symbol in an interval,
    the maximum downlink bandwidth, and c (i) the first pseudo-random sequence generated by an initial kinit value of a pseudo-random sequence.
    The method may include; generate a currently needed position reference signal (PRS) sequence with a length of
    on what
    is the bandwidth of the PRS configured by the high layer signaling and represented by the unit of a resource block; determine a position of the PRS sequence in a physical resource block; transmit the PRS sequence acquired at the given position.
    Generate the currently needed PRS sequence with the extension of
    may include: generating a PRS sequence with an extension of
    on what
    the maximum downlink bandwidth; and intercept the PRS sequence with the extension of
    from the PRS sequence with the extension of

    The PRS sequence ls
    with the extent of
    It's:
    where if an index of an interval in a radio frame, l is an index of an OFDM symbol in an interval, and
    it is a second pseudo-random sequence generated by an initial value and init of a pseudo-random sequence.
    Intercepting the PRS sequence with the length of
    of the PRS sequence generated with the length of
    may include: the PRS sequence generated with the length of
    is represented by
    , on what
    and

    When the subframe is a non-MBSFN subframe,
    AND
    the identity of a cell; when the subframe is an MBSFN subframe,
    on what
    an identity of a subframe.
    Determining an initial shift frequency domain position of the PRS sequence in the physical resource block can
    where a third pseudo-random sequence (c (i ”) is generated according to cinit =
    cell identity.
    In a non-MBSFN subframe, determining the position of the PRS sequence in the physical resource block can be: when a system's cyclic prefix is a normal cyclic prefix:
    when a system's cyclic prefix is an extended cyclic prefix:

    In an MBSFN subframe, determining the position of the PRS sequence in the physical resource block can be:
    where l is an index of an OFDM symbol in a range, k is an index of a subcarrier in an OFDM symbol l, p is an antenna port, and vshift is an initial frequency domain position of a PRS sequence in a physical resource block.
    Transmitting the PRS sequence obtained at the given position may include: when the PRS sequence and data carried by a physical downlink control (PDCCH) channel are transmitted on the same RE, only the data carried by the PDCCH is transmitted;
    Transmitting the PRS sequence obtained at the given position may include: when the PRS sequence and data carried by a Physical Downlink Shared Channel (PDSCH) are transmitted on the same RE, PDSCHs of versions R10 and R9 are mapped to carriers exclusive to one ported with PRS; and when the PRS and data carried by a PDSCH of version R8 are transmitted in the same Resource Element (RE), only the PRS data in the RE are transmitted.
    Transmitting the PRS sequence obtained at the given position may include: when the PRS sequence and data carried by a PDSCH are transmitted in the same RE, the energy of each PRS RE is the same as the energy of a PDSCH RE that carries the data in the OFDM symbol where the PRS RE is located; and when the PRS sequence and data carried by a PDSCH are transmitted in different REs, the energy of each PRS RE is 6 times the PDSCH RE energy that it carries from the data in the OFDM symbol where the PRS RE is located .
    Transmitting the PRS sequence obtained at the given position may include: the transmission energy of the PRS sequence being the same as that of the transmission energy of a Cell-Specific Reference Signal (CRS); or the transmission energy of the PRS sequence is configured through signaling.
    The present disclosure further provides a system for transmitting a position reference signal, which includes a PRS sequence acquisition unit, a positioning unit and a transmission unit; where the PRS sequence acquisition unit is configured to obtain a PRS sequence currently needed with an extension of
    , where NPRSRBe is the PRS bandwidth configured by high-layer signaling; the positioning unit is configured to determine a PRS sequence position obtained by the PRS sequence obtaining unit in a physical resource block; and the transmission unit is configured to transmit the PRS sequence obtained by the PRS sequence obtaining unit at the position determined by the positioning unit.
    Where the PRS sequence with the length of is represented by:


    Where ns is an index of a slot in a radio frame, reads the index of an OFDM symbol in a slot,
    and the maximum bandwidth of the downlink ev 7 and a first c C „: t pseudo-random sequence generated by an initial value init of a pseudo-random sequence.
    The present disclosure further provides a system for transmitting a position reference signal, which includes a PRS sequence acquisition unit, a positioning unit and a transmission unit; where the PRS sequence acquisition unit is configured to acquire a currently needed PRS sequence with a length of
    on what
    -and the PRS bandwidth configured by the high layer signaling; the positioning unit is configured to determine a position in the PRS sequence acquired by the PRS sequence acquisition unit in a physical resource block; and the transmission unit is configured to transmit the PRS sequence acquired by the PRS sequence acquiring unit at the position determined by the positioning unit.
    The PRS sequence acquisition unit may include a PRS sequence generation unit and an intercept unit; where the PRS sequence generation unit is configured to generate a PRS sequence with a length of
    on what
    the maximum downlink RB bandwidth, and the intercepting unit is configured to intercept the PRS sequence with an extension of
    from the PRS sequence with the extension
    Therefore, it is evident that, with the transmission method and transmission system provided in the present disclosure, a currently needed PRS sequence can be obtained directly, or a PRS sequence with the maximum extent is generated first, and then the sequence of PRS Currently needed PRS is intercepted from the PRS sequence to the maximum extent. The method and the system guarantee that an effective PRS sequence can be obtained in any circumstance, in order to guarantee the implementation of the PRS positioning function. BRIEF DESCRIPTION OF THE DRAWINGS
    Figure 1 shows a schematic diagram of a radio frame structure in an LTE system;
    Figure 2 shows a schematic diagram of a physical resource block in an LTE system with a bandwidth of 5MHz;
    Figure 3a is a schematic diagram of the position of a specific reference signal per cell of an LTE system in a physical resource block;
    Figure 3b is another schematic diagram of the position of a specific reference signal per cell of an LTE system in a physical resource block;
    Figure 4a is a schematic diagram of the position of a PRS in a physical resource block according to the existing solution;
    Figure 4b is another schematic diagram of the position of a PRS in a physical resource block according to the existing solution;
    Figure 5 is a schematic diagram of the position of a PRS in a physical resource block when the subframe is an MBSFN;
    Figure 6 is a flow chart of a PRS transmission method based on an embodiment of the present disclosure;
    Figure 7 is a flowchart of an example of applying a method for positioning based on the PRS transmission method of the present disclosure; and
    Figure 8 is a schematic diagram of a PRS transmission system based on an embodiment of the present disclosure. DETAILED DESCRIPTION
    In the following, the technical solution of the present disclosure is described in detail in combination with the drawings and modalities.
    Figure 6 is a flow chart of a PRS transmission method based on an embodiment of the present disclosure. As shown in Figure 6, the method of transmitting PRS based on the modality of the present disclosure includes:
    Step 600: Obtain a PRS string currently needed with an extension of
    , which is represented by a unit of a resource block; there are two specific ways to perform it, as follows: The first way: directly generate the PRS sequence currently
    with the extent of
    on what
    and the PRS band configured by high-layer signaling, this
    where n is an index of an interval in a radio frame, l is the index of an OFDM symbol in an interval,
    is maximum downlink bandwidth c (i) is a pseudo-random sequence generated according to c init and a pseudo-random sequence.
    In a subframe of Non-Multidiffusion Diffusion Single Frequency Network (MBSFN where
    when the subframe is an MBSFN,
    on what
    identity of an MBSFN subframe
    With the first way, a PRS sequence
    currently needed can be directly, which avoids the procedure in PRS with a predetermined extent is intercept is performed, thus making it convenient and straightforward.
    The second way: first, the PRS sequence
    with the maximum extent
    and generated according to the downlink bandwidth; the PRS sequence
    in this modality it is defined according to the following formula:
    where s is an index of an interval in a radio frame, l is the index of an OFDM symbol in an interval of time,
    the maximum downlink bandwidth,
    is a pseudo-random sequence generated according to
    The specific generation method is not described in detail here again due to the fact that it is similar to the method described as above.
    When the subframe is a non-MBSFN subframe,
    on what
    when the subframe is an MBSFN subframe,
    on what
    is the identity of an MBSFN subframe
    So the PRS sequence currently needed
    is intercepted from the PRS sequence
    on what
    on what
    on what
    the PRS bandwidth configured by high-layer signaling, and
    intercepted extent depends on the scope of q, eh represents the starting position of the intercept.
    With the second way, the sequence
    is generated according to the maximum extension
    and then the start position of intercepting
    limited by

    In such a way, when the PRS sequence
    is intercepted, the intercept can be started from a fixed position of the PRS sequence
    , and the interception can be deployed dynamically accordingly and the interception can be with the current PRS bandwidth. If
    , that is, h = 0, then the interception can be started from the starting position of the sequence of
    , then the interception can be started from the end position of the sequence of
    , that is, deducting the PRS sequence with from the start position; unnecessary extension if
    , then the current band NPRS
    PRS, that is, h is generated according to the bandwidth of the current PRSa, eh
    and then the RBe PRS NPRS sequence intercepted at the h position of the
    PRS l, ns
    In the second way, a PRS sequence
    with the maximum downlink bandwidth extension is generated first, and then a sequence
    de with the currently required extension of bandwidth is intercepted from the effective PRS sequence can be obtained in any circumstance, in order to guarantee the realization of the PRS positioning function.
    Step 601 can be combined arbitrarily, that is, the position of the PRS sequence
    in a physical resource block.
    The specific method to perform this step is: first, obtain the initial frequency domain position 'vshift of the PRS sequence

    in which every radio frame generates a pseudo-random sequence
    wake up with
    identityfrequency
    PRS in the physical resource block is generated randomly.
    It can also be defined that
    circumstance, the position of the initial frequency domain determined, which helps to reduce the interference of neighboring cells through cell design.
    Then, the position of the
    in the configured physical resource block it is obtained according to the initial frequency domain position Vshltt.
    Next, the obtaining of the physical resource positions of the PRS 'sequence
    in a non-MBSFN frame and an MBSFN frame are described respectively. (1) In a non-MBSFN frame when a system's cyclic prefix is a normal cyclic prefix, the position of the PRS sequence
    in the configured physical resource block is:
    where k is the index of a subcarrier in the OFDM symbol l; when a system's cyclic prefix is an extended cyclic prefix, the position of the PRS sequence
    in the configured physical resource block is:
    where k is the index of a subcarrier in the OFDM symbol l (2) In an MBSFN subframe the position of the PRS sequence
    in the configured physical resource block, as shown in Figure 5 is
    where k is the index of a subcarrier in the OFDM symbol l
    Using the formula mentioned above in the MBSFN has some advantages, which include a simple mapping subframe, similar to the form of mapping adopted for the normal cyclic prefix and extended cyclic prefix, thus being achieved using the same method. All of these advantages help to reduce the complexity of the realization.
    The order of Step 600 and Step 601 can be combined arbitrarily, that is, the position of the PRS sequence
    in the physical resource block can also be determined first, then the PRS sequence currently required with the extension of
    or the position of the PRS sequence
    in the physical resource block is determined in the process to obtain the PRS sequence currently required with the extension of

    Step 602: Broadcast the PRS sequence
    determined physical resource position; where the sequence of
    is mapped to the
    complex modulation symbol 'in the interval s of the antenna port p and then it is transmitted, that is
    that represents that the PRS sequence
    is transmitted in carrier k at / OFDM of th in the range of the antenna port p
    When PRS and data from a physical downlink control channel (PDCCH), a physical hybrid ARQ indicator channel (PHICH), a primary synchronization channel (PSCH), a secondary synchronization channel (SSCH) or a channel physical diffusion (PBCH) are transmitted in the same RE, the PRS symbol in the RE is censored (or covered), that is, only the data from the PDCCH, PHICH, PSCH, SSCH or PBCH are transmitted, or in other words, the PRS in the RE is not transmitted.
    When the PRS and the PDSCH data are transmitted in the same bandwidth, the PDSCHs of RIO and R9 versions avoid the mapping of PRS when mapped to the resource area, that is, when the data carried by PDSCHs of RIO and R9 versions deploy rate correlation, the data extent after code rate correlation is calculated according to the resource from which the resource occupied by the PRS is deducted, that is, PDSCHs of RIO and R9 versions avoid any carrier mapped with the PRS when mapping is deployed.
    When the data carried by the PDSCH version R8 and the PRS are transmitted in the same RE, the data from the PDSCH version R8 are censored, in other words, the data carried by the PDSCH version R8 in the RE is not transmitted, and only the data of PRS in the RE are transmitted.
    Additionally, when the PRS and the data transported by the PDSCH are transmitted in the same bandwidth or in the same physical resource block, the energy of each PRS RE is consistent with the energy of another PDSCH RE in the OFDM symbol where the PRS RE is located, which can ensure that the entire system has a unified energy, making control operations simpler; when the PRS and the data transported by the PDSCH are transmitted in different bandwidths, the energy of each PRS RE is 6 times the energy of another RE in the OFDM symbol in which the PRS RE is located, under the condition that the total energy is constant, the energy of the PRS RE is increased, thus improving the PRS transmission performance; in special circumstances, the transmission energy can be 0, that is, it does not transmit the PRS; or the PRS transmission energy can be the same as the CRS transmission energy; or the PRS transmission energy can be configured through signaling, ie
    , k, ll, ns, where is the energy regulation factor, and the value of á is controlled by high-layer signaling.
    Figure 7 is a flow chart of an example of applying a method for positioning based on the PRS transmission method of the present disclosure. As shown in Figure 7, the method for positioning based on the PRS transmission method of the present disclosure includes the following steps:
    Step 700: a base station transmits configuration information to a UE.
    In this step, the configuration information includes a set of position collaboration cells (the set of position collaboration cells at least includes cell IDs), the generation cycle and initial PRS subframe, and the quantity of the subframe transmitted consecutively every time and bandwidth to transmit the subframe consecutively every time.
    Step 701: the base station obtains a currently needed PRS sequence
    with an extension of

    Step 702: the base station determines the position of the
    PRS
    , without a physical resource block.
    Step 703: the base station transmits the sequence of
    PRS l
    at the given physical resource position.
    Step 701 and Step 702 mentioned above are not performed in sequence and can be performed at the same time.
    The specific realization of Steps 701 to 703 is similar to that of the PRS transmission method steps according to the modality as shown in Figure 6 and is not described in detail again here.

    Step 704: The UE receives the PRS according to the configuration information of the base station and implements positioning.
    After that, the UE will return the position information to the base station.
    Figure 8 is a schematic diagram of a system for transmitting a position reference signal according to an embodiment of the present disclosure. As shown n
    Figure 8, the system for transmitting position reference signals includes a PRS sequence acquisition unit, a positioning unit and a transmission unit; where the PRS sequence acquisition unit is configured to obtain a PRS sequence currently
    is the bandwidth of the
    configured by high-layer signaling; where the PRS sequence acquisition unit can directly generate the currently needed PRS sequence
    bandwidth
    on what
    width configured by high-layer signaling; the PRS sequence acquisition unit still includes a PRS sequence generation unit and a PRS sequence unit
    on what
    interception, by the PRS sequence generation unit; the positioning unit is configured to determine the position of the
    obtained by the unit of obtaining
    PRS sequence in a physical resource block; the transmission unit is configured to transmit the PRS sequence obtained by the PRS sequence obtaining unit at the position determined by the positioning unit.
    The implantation of units in the system for transmitting position reference signals is similar to the implantation mentioned above of the method for transmitting a position reference signal and is not described again here.
    The foregoing description refers only to the illustrative modalities of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have several changes and modifications.
    权利要求:
    Claims (10)
    [0001]
    1. Method for transmitting a position reference signal, characterized by comprising: obtaining a position reference signal (PRS) sequence currently required with an extension of
    [0002]
    2. Method for transmitting a position reference signal, characterized by understanding: generating a sequence of Position Reference Signal (PRS) currently required, with an extension of
    [0003]
    Method according to either of claims 1 or 2, characterized in that when the subframe is a non-MBSFN, 210 cell cell
    [0004]
    4. Method, according to 1, characterized by determining an initial frequency domain position vshift of the PRS sequence in the physical resource block to be:
    [0005]
    5. Method according to claim 4, characterized in that: in a non-MBSFN subframe, determining the position of the PRS sequence in the physical resource block is: when the cyclic prefix of a system is a normal cyclic prefix:
    [0006]
    6. Method, according to claim 1, characterized by the transmission of the PRS sequence obtained in the determined position comprises: when the PRS sequence and data transported by a Physical Downlink Control Channel (PDCCH) are transmitted in the same Element Resource (RE), only the data carried by the PDCCH is transmitted.
    [0007]
    Method according to either of claims 1 or 2, characterized in that the transmission of the PRS sequence obtained in the determined position comprises: when the PRS sequence and the data carried by a PDSCH are transmitted in the same bandwidth RE, a power of each PRS ER is consistent with the same power as a PDSCH ER carrying the data in an OFDM symbol in which the PRS ER is located; and when the PRS sequence and the data carried by a PDSCH are transmitted in different RE bandwidths, a power of each PRS ER is 6 times the power of a PDSCH ER carrying the data in the OFDM symbol where the PRS ER is located.
    [0008]
    Method according to either of claims 1 or 2, characterized in that the transmission of the PRS sequence obtained at the given position comprises: the transmission power of the PRS sequence is the same as the transmission power of a Specific Reference Signal Cell (CRS); or the transmission power of the PRS sequence is configured through signaling.
    [0009]
    9. System for transmitting a position reference signal, characterized by comprising a PRS sequence acquisition unit, a positioning unit and a transmission unit, in which the PRS sequence acquisition unit is configured to obtain a PRS currently 2 x NNPRS required with an RB extension, where RB is a PRS bandwidth configured by high layer signaling; the positioning unit is configured to determine a PRS sequence position obtained by the PRS sequence obtaining unit in a physical resource block; and the transmission unit is configured to transmit the PRS sequence obtained by the PRS sequence obtaining unit at the position determined by the positioning unit; where the PRS sequence with the 2XNRB extension is represented by
    [0010]
    10. System for transmitting a position reference signal, characterized by comprising a PRS sequence acquisition unit, a positioning unit and a transmission unit; wherein the PRS sequence acquisition unit is configured to obtain a currently required 2 x N NPRS PRS sequence with an RB extension, where RB is a PRS bandwidth configured by high layer signaling; the positioning unit is configured to determine a PRS sequence position obtained by the PRS sequence obtaining unit in a physical resource block; the transmission unit is configured to transmit the PRS sequence obtained by the PRS sequence obtaining unit at the position determined by the positioning unit; wherein the PRS sequence acquisition unit comprises a PRS sequence generation unit and an intercept unit; wherein the generation unit configured to generate a PRS sequence of PRS sequence generation; where the PRS sequence with which is an index of an interval in a radio frame, is the index of an OFDM symbol in an interval, and v 7 is a pseudo-random sequence generated by an initial init value of a pseudo-random sequence; wherein the interception of a PRS sequence with the extension from the PRS sequence generated with the extension of the RB comprises: PRS sequence generated with the extension of is
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    EP2439965B1|2016-05-11|
    EP2439965A1|2012-04-11|
    JP5478721B2|2014-04-23|
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    MX2012001001A|2012-03-16|
    CN101616360A|2009-12-30|
    US8654727B2|2014-02-18|
    BR112012001283A2|2016-02-23|
    EP2439965A4|2015-01-21|
    KR101364951B1|2014-02-19|
    JP2012533238A|2012-12-20|
    US20120093101A1|2012-04-19|
    WO2011009277A1|2011-01-27|
    KR20120035942A|2012-04-16|
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    法律状态:
    2019-01-15| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-11-12| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2019-11-19| B15K| Others concerning applications: alteration of classification|Free format text: AS CLASSIFICACOES ANTERIORES ERAM: H04W 4/02 , H04W 4/12 , H04L 27/26 Ipc: H04W 4/02 (2018.01), G01S 1/20 (1968.09), H04L 5/0 |
    2020-09-01| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-12-08| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 08/12/2020, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    CN2009101615214A|CN101616360B|2009-07-24|2009-07-24|Method and system for sending positioning reference signal|
    CN200910161521.4|2009-07-24|
    PCT/CN2009/076288|WO2011009277A1|2009-07-24|2009-12-30|Method and system for transmitting position reference signal|
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