WO2017012090A1 - Procédé et dispositif de configuration de port de signal de référence de démodulation de liaison descendante (dmr) - Google Patents

Procédé et dispositif de configuration de port de signal de référence de démodulation de liaison descendante (dmr) Download PDF

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Publication number
WO2017012090A1
WO2017012090A1 PCT/CN2015/084776 CN2015084776W WO2017012090A1 WO 2017012090 A1 WO2017012090 A1 WO 2017012090A1 CN 2015084776 W CN2015084776 W CN 2015084776W WO 2017012090 A1 WO2017012090 A1 WO 2017012090A1
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Prior art keywords
terminal
initial value
sequence
random sequence
cell
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PCT/CN2015/084776
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English (en)
Chinese (zh)
Inventor
吴强
孙昊
张旭
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华为技术有限公司
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Priority to PCT/CN2015/084776 priority Critical patent/WO2017012090A1/fr
Priority to CN201580041239.6A priority patent/CN106664695B/zh
Publication of WO2017012090A1 publication Critical patent/WO2017012090A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for configuring a downlink DMRS (De Modulation Reference Signal) port.
  • DMRS Demodulation Reference Signal
  • the downlink data scheduling is performed by a PDCCH (Physical Downlink Control Channel)/ePDCCH (Enhanced Physical Downlink Control Channel). It is implemented that one PDCCH/ePDCCH signaling can only schedule one downlink data transmission.
  • PDCCH Physical Downlink Control Channel
  • ePDCCH Enhanced Physical Downlink Control Channel
  • 3GPP 3 rd Generation Partnership Project , Third Generation Partnership Project
  • MU-MIMO Multi-User Multiple -Input Multiple-Output, multi-user multiple input multiple output
  • the base station dynamically allocates DMRS ports to the terminal through PDCCH/ePDCCH signaling, and the base station uses different downlink DMRS ports to simultaneously transmit downlink data to multiple terminals.
  • the downlink DMRS port of the terminal is semi-statically configured by the base station, that is, the downlink DMRS port of the terminal is fixed for a period of time.
  • the downlink DMRS ports of some terminals are the same.
  • the base station cannot enable the MU-MIMO technology to transmit downlink data to such terminals, thereby reducing system throughput.
  • the current method of configuring the downlink DMRS port may be because the different terminals may correspond to the same downlink DMRS port, and the base station cannot enable the MU-MIMO technology to cause the system to swallow. Defects with reduced throughput.
  • the embodiment of the invention provides a method and a device for configuring a downlink DMRS port, which are used to prevent different terminals from corresponding to the same downlink DMRS port, so as to implement the effect that the base station can enable the MU-MIMO technology to improve the system throughput.
  • the first aspect provides a method for configuring a downlink DMRS port, including:
  • the terminal ID is a globally unique identifier or a wireless network temporary identifier RNTI.
  • the calculating the random sequence corresponding to the terminal according to the terminal ID and the cell ID including:
  • the initial value is calculated according to the terminal ID and the cell ID, including:
  • the initial value is calculated according to the terminal ID and the cell ID by using the following rules:
  • ID1 is the terminal ID
  • ID2 is the cell ID
  • A is a constant.
  • the calculating the random sequence corresponding to the terminal according to the initial value includes:
  • converting the initial value to an initial value expressed in binary includes:
  • the initial value is converted to an initial value expressed in binary as follows:
  • i denotes the number of the bit
  • the value of m is equal to the length of the initial value expressed in binary minus one
  • Determining the first sequence according to the initial value expressed in binary comprising:
  • the bit weight in the initial value expressed in binary is taken as the first sequence.
  • x 1 (i) is determined as follows:
  • x 1 (i) (x 1 (i-m+3)+x 1 (i-m+2)+x 1 (i-m+1)+x 1 (im)) mod2.
  • determining the second sequence includes:
  • the second sequence is determined using the following rules:
  • the calculating the random sequence corresponding to the terminal according to the first sequence and the second sequence includes:
  • the random sequence is calculated using the following rules:
  • determining, by the random sequence, the terminal in the any one of the subframes The port number of the corresponding downlink DMRS port including:
  • the specified bit corresponding to the any one of the subframes is determined by using the following rules:
  • P is the specified bits, N being the number of cycles of the cycle of the radio frame number, R is the number of radio frames included in the cycle, n f of the subframe is located at any of a radio frame number of a radio frame L is the number of wireless subframes included in the radio frame, and n s is the subframe number of any one of the subframes.
  • a second aspect provides an apparatus for configuring a downlink DMRS port, including:
  • a determining unit configured to determine a terminal identifier ID of the terminal, and a cell ID of a cell where the terminal is currently located;
  • a calculating unit configured to calculate a random sequence corresponding to the terminal according to the terminal ID and the cell ID;
  • the determining unit is further configured to, according to the random sequence, determine, according to the random sequence, a port number of a downlink demodulation reference signal DMRS port corresponding to the terminal in the any one subframe, and the port number
  • the corresponding downlink DMRS port is used as a downlink DMRS port that the terminal can adopt in any one of the subframes.
  • the terminal ID is a globally unique identifier or a wireless network temporary identifier RNTI.
  • the calculating unit calculates the terminal according to the terminal ID and the cell ID Corresponding random sequence, specifically:
  • the calculating unit calculates an initial value according to the terminal ID and the cell ID
  • the calculating unit is specifically:
  • the initial value is calculated according to the terminal ID and the cell ID by using the following rules:
  • ID1 is the terminal ID
  • ID2 is the cell ID
  • A is a constant.
  • the computing unit when calculating the random sequence corresponding to the terminal according to the initial value, is specifically:
  • the computing unit when converting the initial value into an initial value expressed in binary, is specifically:
  • the initial value is converted to an initial value expressed in binary as follows:
  • i denotes the number of the bit
  • the value of m is equal to the length of the initial value expressed in binary minus one
  • the calculating unit determines the first sequence according to the initial value expressed in binary, the calculating unit is specifically:
  • the bit weight in the initial value expressed in binary is taken as the first sequence.
  • x 1 (i) is determined as follows:
  • x 1 (i) (x 1 (i-m+3)+x 1 (i-m+2)+x 1 (i-m+1)+x 1 (im)) mod2.
  • the second sequence is determined using the following rules:
  • the calculating unit calculates, according to the first sequence, the second sequence, a random corresponding to the terminal
  • the sequence is specific, it is:
  • the random sequence is calculated using the following rules:
  • the determining unit determines, according to the random sequence, that the terminal is in any one of the foregoing When the port number of the downlink DMRS port corresponding to the subframe is specified as follows:
  • the determining unit is further configured to:
  • the specified bit corresponding to the any one of the subframes is determined by using the following rules:
  • P is the specified bits, N being the number of cycles of the cycle of the radio frame number, R is the number of radio frames included in the cycle, n f of the subframe is located at any of a radio frame number of a radio frame L is the number of wireless subframes included in the radio frame, and n s is the subframe number of any one of the subframes.
  • a method for configuring a downlink DMRS port is provided: determining a terminal identifier ID of a terminal, and a cell ID of a cell where the terminal is currently located; and according to the terminal ID and the cell The ID calculates a random sequence corresponding to the terminal, and determines, according to the random sequence, a port number of the downlink DMRS port corresponding to the terminal in any one subframe, and uses the downlink DMRS port corresponding to the port number as The downlink DMRS port that the terminal can adopt in any one of the subframes.
  • the ports corresponding to the terminals in different subframes may also be different, and the ports corresponding to different terminals in a certain period of time. The probability of being the same is small, so the probability of the base station enabling the MU-MIMO technology is increased, thereby improving the system throughput.
  • FIG. 1 is a flowchart of configuring a downlink DMRS port according to an embodiment of the present invention
  • 3A is a schematic diagram of an apparatus for configuring a downlink DMRS port according to an embodiment of the present invention
  • FIG. 3B is another schematic diagram of an apparatus for configuring a downlink DMRS port according to an embodiment of the present invention.
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the letter “/” in this article generally indicates that the contextual object is an "or" relationship.
  • a method for configuring a downlink DMRS port is provided in the embodiment of the present invention, and the specific process is as follows:
  • Step 100 Determine a terminal ID of the terminal, and a cell ID of a cell where the terminal is currently located;
  • Step 110 Calculate a random sequence corresponding to the terminal according to the terminal ID and the cell ID.
  • Step 120 Determine, for any one subframe, a port number of the downlink DMRS port corresponding to the terminal in any one subframe according to the random sequence, and use the downlink DMRS port corresponding to the port number as the downlink DMRS that the terminal can adopt in any one subframe. port.
  • the terminal ID may be a globally unique identifier.
  • the first N bits of the globally unique identifier of different terminals in the same cell may be the same.
  • the first N bits of the calculated random sequence are It may be the same. If the port number of the corresponding downlink DMRS port corresponding to the terminal in any one subframe is determined according to the random sequence in step 120, the port number is determined according to the first N bits of the random sequence, then different The downlink DMRS port determined by the terminal may be the same. Therefore, the terminal ID may also be an RNTI (Radio Network Tempory Identity) in order to avoid determining the same downlink DMRS port sequence for different terminals.
  • RNTI Radio Network Tempory Identity
  • the value of the cell ID may be [0, 503], and when the terminal ID is RNTI, the value of the terminal ID may be [0, 65535]. It should be noted that, with the development of the communication technology, the value range of the cell ID and the value range of the terminal ID may be changed, and are not limited to the above-mentioned value range, and will not be described in detail herein.
  • the random sequence corresponding to the terminal is calculated according to the initial value.
  • the initial value is calculated based on the terminal ID and the cell ID using the following rules:
  • ID1 is the terminal ID
  • ID2 is the cell ID
  • A is a constant, and optionally, A is 14.
  • the random sequence corresponding to the terminal is calculated according to the first sequence and the second sequence.
  • the initial value is converted to an initial value expressed in binary as follows:
  • i denotes the number of the bit
  • the value of m is equal to the length of the initial value expressed in binary minus one
  • the bit weight in the initial value expressed in binary is taken as the first sequence.
  • c init 1 * 2 5 + 1 * 2 4 + 1 * 2 3 + 0 * 2 2 + 0 * 2 1 + 0*2 0 , it can be inferred that x 1 (0), x 1 (1) and x 1 (2) are all 0, x 1 (3), x 1 (4) and x 1 (5) Is 1.
  • c init 1 * 2 5 + 1 * 2 4 + 1 * 2 3 + 0 * 2 2 + 0 * 2 1 +1*2 0
  • x 1 (1) and x 1 (2) are both 0, x 1 (0), x 1 (3), x 1 (4), and x 1 (5) Both are 1.
  • x 1 (i) when i is less than or equal to m.
  • i When calculating a random sequence, i may be greater than m.
  • x 1 (i) is determined as follows:
  • x 1 (i) (x 1 (i-m+3)+x 1 (i-m+2)+x 1 (i-m+1)+x 1 (im))mod2 (Equation 3)
  • c init 1 * 2 5 + 1 * 2 4 + 1 * 2 3 + 0 * 2 2 + 0 * 2 1 + 1*2 0
  • x 1 (1) and x 1 (2) are both 0, x 1 (0), x 1 (3), x 1 (4), and x 1 (5) are both 1
  • formula 3 can be used, which can be as follows:
  • m may also be other values, but the calculation process is similar, and no further description is given here.
  • Equation 5 in order to improve the random sequence calculated by different terminals, with the same probability, Equation 5 can be further optimized as follows:
  • the port number of the downlink DMRS port corresponding to the terminal in any one subframe is determined according to the random sequence, the following may be adopted:
  • Determining a value in a specified bit corresponding to any one of the subframes from the random sequence, using the port number corresponding to the determined value as the port number of the downlink DMRS port, or matching the determined value with the specified bit The values in the bits of the relationship are combined, and the port number corresponding to the combined value is used as the port number of the downlink DMRS port.
  • port 8 corresponds to 1 and port 7 corresponds to 0.
  • the specified bit is the 5th bit in the random sequence. If the value 1 in the 5th bit is 1, the port 8 is used as the downlink DMRS port; if the 5th If the value bit in the bit is 0, then port 7 is used as the downstream DMRS port.
  • port 8 corresponds to 11, 00, port 7 corresponds to 10, 01, and the designated bit is the fifth bit in the random sequence, and the bit that matches the specified bit with the preset bit is the third bit.
  • the value in the 5th bit is 1, and the value in the 3rd bit is 1, then port8 is used as the downlink DMRS port; if the value in the 5th bit is 0, if in the 3rd bit If the value is 0, port8 is used as the downlink DMRS port; if the value in the 5th bit is 0, if the value in the 3rd bit is 1, port7 is used as the downlink DMRS port; if the 5th bit is used The value in the value is 1, and if the value in the third bit is 0, port 7 is used as the downstream DMRS port.
  • bit described above in accordance with the preset relationship with the specified bit is a bit that is non-contiguous with the specified bit.
  • bit that conforms to the preset bit with the specified bit may also be a bit that is continuous with the specified bit.
  • port 8 corresponds to 11, 00, port 7 corresponds to 10, 01, and the designated bit is the fifth bit in the random sequence, and the bit that matches the specified bit with the preset bit is the fourth bit.
  • the value in the 5th bit is 1, and the value in the 4th bit is 1, then port8 is used as the downlink DMRS port; if the value in the 5th bit is 0, if in the 4th bit If the value is 0, port8 is used as the downlink DMRS port; if the value in the 5th bit is 0, if the value in the 4th bit is 1, port7 is used as the downlink DMRS port; if the 5th bit is used The value in is 1 and if the value in the 4th bit is 0, port 7 is used as the downstream DMRS port.
  • the specified bit corresponding to any subframe is determined by the following rules:
  • N is the number of cycles of the cyclic period of the radio frame number
  • R is the number of radio frames included in the cycle
  • n f is the radio frame number of the radio frame in which any sub-frame is located
  • L is the radio frame The number of wireless subframes included
  • n s is the subframe number of any subframe.
  • the cycle period of one radio frame number refers to the change of the radio frame number from 0 to the maximum value of the radio frame number.
  • the radio frame number ranges from [0, 1, 2, ..., 1023], when the radio frame number starts to change from 0 to 1023, the cycle period of the first radio frame number ends, and the cycle period of the second radio frame number starts, and the radio frame number changes from 0 to change.
  • the cycle period of the second radio frame number ends, and the third radio frame number period is started, and the loop is repeated until the end.
  • Step 200 Determine an RNTI used by the terminal 1 in the current cell, and a cell ID of the current cell.
  • Step 210 Calculate an initial value of 121 according to the RNTI and the cell ID by using Equation 1.
  • Step 220 Display 121 in binary It can be concluded that x 1 (0), x 1 (3), x 1 (4), x 1 (5), and x 1 (6) are all 1, x 1 (1), and x 1 (2) are 0. ;
  • Step 230 Calculate x 1 (i) when i is greater than 6 by using formula 3;
  • Step 240 Calculate x 2 (i) using Equation 4.
  • Step 250 Calculate the random sequence C according to the calculated x 1 (i) and x 2 (i) using Equation 5;
  • Step 260 For any subframe, select one from the random sequence according to formula seven The specified bit corresponding to the subframe;
  • Step 270 Determine a port number of a downlink DMRS port corresponding to the value in the specified bit.
  • Step 280 The terminal 1 transmits or receives data by using a downlink DMRS port corresponding to the determined port number.
  • an embodiment of the present invention provides an apparatus for configuring a downlink DMRS port, where the apparatus includes a determining unit 30 and a calculating unit 31, where:
  • a determining unit 30 configured to determine a terminal identifier ID of the terminal, and a cell ID of a cell where the terminal is currently located;
  • the calculating unit 31 is configured to calculate a random sequence corresponding to the terminal according to the terminal ID and the cell ID;
  • the determining unit 30 is further configured to: determine, according to the random sequence, the port number of the downlink demodulation reference signal DMRS port corresponding to the terminal in any one subframe according to the random sequence, and use the downlink DMRS port corresponding to the port number as the terminal.
  • the terminal ID is a globally unique identifier or a wireless network temporary identifier RNTI.
  • the calculating unit 31 when calculating the random sequence corresponding to the terminal according to the terminal ID and the cell ID, is specifically:
  • the random sequence corresponding to the terminal is calculated according to the initial value.
  • the calculating unit 31 when calculating the initial value according to the terminal ID and the cell ID, is specifically:
  • the initial value is calculated based on the terminal ID and the cell ID using the following rules:
  • ID1 is the terminal ID
  • ID2 is the cell ID
  • A is a constant.
  • the calculating unit 31 when calculating the random sequence corresponding to the terminal according to the initial value, is specifically:
  • the random sequence corresponding to the terminal is calculated according to the first sequence and the second sequence.
  • the calculating unit 31 is specifically:
  • the initial value is converted to an initial value expressed in binary as follows:
  • i denotes the number of the bit
  • the value of m is equal to the length of the initial value expressed in binary minus one
  • the calculating unit 31 when determining the first sequence according to the initial value expressed in binary, is specifically:
  • the bit weight in the initial value expressed in binary is taken as the first sequence.
  • x 1 (i) is determined as follows:
  • x 1 (i) (x 1 (i-m+3)+x 1 (i-m+2)+x 1 (i-m+1)+x 1 (im)) mod2.
  • the calculating unit 31 determines the second sequence, specifically:
  • the second sequence is determined using the following rules:
  • the calculating unit 31 calculates the random sequence corresponding to the terminal according to the first sequence and the second sequence, the specific:
  • the determining unit 30 determines, according to the random sequence, the port number of the downlink DMRS port corresponding to the terminal in any one subframe, specifically:
  • the determining unit 30 is further configured to:
  • the specified bit corresponding to any subframe is determined by the following rules:
  • N is the number of cycles of the cyclic period of the radio frame number
  • R is the number of radio frames included in the cycle
  • n f is the radio frame number of the radio frame in which any sub-frame is located
  • L is the radio frame The number of wireless subframes included
  • n s is the subframe number of any subframe.
  • the device of the present invention provides an apparatus for configuring a downlink DMRS port, including at least one processor 301, a communication bus 302, a memory 303, and at least one communication interface 304.
  • the communication bus 302 is used to implement the connection and communication between the above components, and the communication interface 304 is used to connect and communicate with external devices.
  • the memory 303 is configured to store executable program code, and the processor 301 executes the program code for:
  • the port number of the downlink demodulation reference signal DMRS port corresponding to the terminal in any one subframe is determined according to the random sequence, and the downlink DMRS port corresponding to the port number is used as the downlink that the terminal can adopt in any subframe.
  • DMRS port is used as the downlink that the terminal can adopt in any subframe.
  • processor 301 can also perform other operations performed by the determining unit 30 and the calculating unit 31 in FIG. 3A, and details are not described herein again.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention may employ computer-usable storage media (including but not limited to disks) in one or more of the computer-usable program code embodied therein. The form of a computer program product implemented on a memory, CD-ROM, optical memory, or the like.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Abstract

L'invention concerne un procédé et un dispositif pour configurer un port DMRS de liaison descendante. Le procédé dans la solution comprend les étapes consistant : à déterminer un identifiant de terminal (ID) d'un terminal et un ID de cellule d'une cellule dans laquelle se trouve le terminal actuellement ; à calculer une séquence aléatoire correspondant au terminal sur la base de l'ID de terminal et l'ID de cellule ; et, pour l'une quelconque sous-trame, à déterminer un numéro de port correspondant à un port de DMRS de liaison descendante lorsque le terminal est sous l'une quelconque d'une sous-trame selon la séquence aléatoire, et prendre le port de DMRS de liaison descendante correspondant au numéro de port en tant que port de DMRS de liaison descendante qui peut être utilisé lorsque le terminal est sous une sous-trame quelconque. Dans la solution, étant donné que des ports correspondant à des terminaux sous des sous-trames différentes peuvent également être différents, la probabilité que tous les ports correspondant à différents terminaux à l'intérieur d'une période de temps soient identiques est faible. Ainsi, la probabilité qu'une station de base active la technologie MU-MIMO est améliorée, ce qui améliore le débit du système.<sb />
PCT/CN2015/084776 2015-07-22 2015-07-22 Procédé et dispositif de configuration de port de signal de référence de démodulation de liaison descendante (dmr) WO2017012090A1 (fr)

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CN201580041239.6A CN106664695B (zh) 2015-07-22 2015-07-22 一种配置下行解调参考信号dmrs端口的方法及装置

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CN109150433B (zh) * 2017-06-16 2022-02-01 展讯通信（上海）有限公司 Dmrs端口调度和接收的设置方法、基站、终端及可读介质
CN109391571B (zh) * 2017-08-11 2020-12-04 华为技术有限公司 相位噪声估计方法及设备
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