[go: up one dir, main page]

WO2012088902A1 - Procédé et système d'envoi de signal de référence de sondage utilisés pour un système de transmission multipoint coordonné - Google Patents

Procédé et système d'envoi de signal de référence de sondage utilisés pour un système de transmission multipoint coordonné Download PDF

Info

Publication number
WO2012088902A1
WO2012088902A1 PCT/CN2011/078741 CN2011078741W WO2012088902A1 WO 2012088902 A1 WO2012088902 A1 WO 2012088902A1 CN 2011078741 W CN2011078741 W CN 2011078741W WO 2012088902 A1 WO2012088902 A1 WO 2012088902A1
Authority
WO
WIPO (PCT)
Prior art keywords
srs
cell
configuration information
coordinated
base station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2011/078741
Other languages
English (en)
Chinese (zh)
Inventor
王瑜新
郝鹏
陈艺戬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZTE Corp
Original Assignee
ZTE Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Publication of WO2012088902A1 publication Critical patent/WO2012088902A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • the present invention relates to a method and system for transmitting a Sounding Reference Signal (SRS) for a CoMP (Coordinated Multi-point) transmission system.
  • SRS Sounding Reference Signal
  • CoMP Coordinatd Multi-point
  • the uplink physical channel of the LTE (Long Term Evolution) system includes a physical random access channel (PRACH), a physical uplink shared channel (PUSCH), and a physical uplink control channel (PUCCH, Physical). Uplink control channel ).
  • PRACH physical random access channel
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • Uplink control channel PUSCH has two different cyclic prefixes (CP, Cyclic Prefix) lengths, which are Normal Cyclic Prefix and Extended Cyclic Prefix.
  • CP Cyclic Prefix
  • Each sub-frame of a PUSCH consists of two slots (Slots).
  • the Demodulation Reference Signal (DMRS) position is different in the subframe.
  • 1 is a schematic diagram of a time domain position of a demodulation reference signal in the prior art. As shown in FIG.
  • each subframe contains two DMRS symbols
  • FIG. 1a is a schematic diagram of a DMRS time domain position when a normal cyclic prefix is used.
  • Each subframe contains 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols, including DMRS symbols, the OFDM symbol represents the time domain position of one subframe, and
  • FIG. 1b is the DMRS time when the extended cyclic prefix is used. Schematic diagram of the location of the domain, each subframe containing 12 time domain data OFDM symbols.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the multi-point coordinated transmission technology utilizes the coordinated transmission of the transmit antennas of multiple cells to achieve higher capacity and reliable transmission of the wireless link at the cell edge, and can effectively solve the problem of cell edge interference.
  • the basic principle of multipoint transmission and the structure diagram of multi-cell joint processing are shown in Fig. 2.
  • Downlink CoMP is divided into two categories: Joint Processing/Joint Transmission (JP/JT, Joint Processing/Joint Transmission) and Coordinated Scheduling/Beamforming (CS/CB, Coordinated Scheduling/Beamforming).
  • JT data is simultaneously transmitted from multiple cells, and the transmission data, scheduling, and channel state information are only exchanged between multiple transmission points in the cooperation set; in CS/CB, only the serving cell sends data to the UE, The scheduling and beamforming information interacts in the CoMP collaboration set.
  • Different cells participating in transmission or cooperation form a cooperation set.
  • one cell is a serving cell, and the remaining cells are coordinated cells.
  • SRS is a signal used between a UE and a base station to measure channel state information (CSI).
  • CSI channel state information
  • the UE sends an uplink SRS on the last data symbol of the transmitting subframe according to the bandwidth indicated by the eNB, the frequency domain location, the sequence cyclic shift, the period, and the subframe offset, and the eNB receives the uplink SRS according to the received SRS.
  • the uplink CSI of the UE is determined, and operations such as frequency domain selection scheduling and closed loop power control are performed according to the obtained CSI.
  • the SRS sequence sent by the UE is obtained by cyclically shifting a root sequence 7 (n) in the time domain. Different cyclic shifts are performed on the same root sequence, and different SRSs can be obtained.
  • the sequence, and the obtained SRS sequences are mutually orthogonal, and therefore, these SRS sequences can be allocated to different UEs for use in implementing code division multiple access between UEs.
  • equation (1) s is indicated by 3-bit signaling, which are 0, 1, 2, 3, 4, 5, 6 and
  • Equation (1) can be regarded as dividing the SRS sequence into 8 parts at equal intervals in the time domain, but since the SRS sequence length is a multiple of 12, the minimum length of the SRS sequence is 24.
  • the frequency domain bandwidth of the SRS is configured in a tree structure. Each SRS bandwidth configuration corresponds to a tree structure.
  • the SRS bandwidth of the highest layer (or the first layer) (SRS-Bandwidth) corresponds to the maximum SRS bandwidth of the SRS bandwidth configuration, or SRS bandwidth. range.
  • the UE calculates its own SRS bandwidth according to the signaling indication of the base station, and then determines the initial frequency domain position of the SRS according to the upper layer signaling frequency domain position “ ⁇ c transmitted by the eNB.
  • the UE transmits the SRS only on the last single carrier frequency division multiplexing (SC-FDMA) symbol of the subframe.
  • SC-FDMA single carrier frequency division multiplexing
  • UE-domain SRS configuration parameters related to four a cell-specific (cell-specific) sub-frame period (T SFC) and proprietary sub-frame offset ( ⁇ ), and the UE-specific (UE-specific) of Period ( ) and subframe offset ( ⁇ ).
  • Table 1 and Table 2 show the cell-specific period and subframe offset in the Frequency Division Duplex (FDD) and Time Division Duplex (TDD) systems, respectively.
  • the cell-specific period and subframe offset give the time domain subframe position where all UEs in the cell may transmit SRS, while in other subframes, the use of the last SC-FDMA symbol is independent of the SRS transmission.
  • the cell-specific one SRS transmission period in the cell is 5 subframes, and the subframe 0 and subframe 1 positions in each cycle will be Can be used by the UE to send SRS.
  • the sequence used by the SRS is selected from the demodulation pilot sequence group.
  • the SRS bandwidth of the UE is 4 resource blocks (RB, Resource Block), the computer generated (CG, Computer Generated) with a length of 2 RBs is used. Sequence; When the SRS bandwidth of the UE is greater than 4 RBs, a corresponding length of Zadoff-Chu (ZC) sequence is used.
  • RB Resource Block
  • CG Computer Generated
  • the sub-carriers of the SRS are placed at intervals, that is, the SRS is transmitted using a comb structure.
  • the number of frequency combs in the LTE system is 2, which also corresponds to a time domain repeat coefficient value (RPF, RePetition Factor) of 2.
  • RPF time domain repeat coefficient value
  • 4 is a schematic view of a comb structure of a prior art SRS.
  • the UE transmits the SRS for the even or odd subcarriers using only the frequency domain index based on the frequency comb comb position indication of the 1-bit upper layer signaling.
  • This comb structure allows more UEs to send SRS within the same SRS bandwidth.
  • multiple UEs may use different cyclic shifts on the same frequency comb, and then send SRS through code division multiplexing, or two UEs may be combed on different frequencies and transmitted by frequency division multiplexing.
  • SRS SRS
  • a UE that transmits an SRS within a certain SRS bandwidth (4 RBs) can use 8 cyclic shifts and 2 frequency combs that can be used, so the UE has a total of 16 A resource that can be used to send SRS, that is, up to 16 SRSs can be sent simultaneously within this SRS bandwidth.
  • Uplink single-user multiple-input multiple-output (SU-MIMO, Single User Multiple Input Multiple) is not supported in LTE systems. Output ), the UE can only transmit one SRS at each moment, so one UE only needs one SRS resource. Therefore, within the above SRS bandwidth, the system can simultaneously multiplex up to 16 UEs.
  • SU-MIMO Single User Multiple Input Multiple
  • the advanced LTE (LTE-A, LTE-Advanced) system is a next-generation evolution system of the LTE system. It supports SU-MIM0 on the uplink and can use up to 4 antennas as uplink transmit antennas. That is to say, the UE can simultaneously transmit SRS on multiple antennas at the same time, and the eNB needs to estimate the state on each channel according to the SRS received on each antenna.
  • each base station in the cooperation set needs to obtain downlink channel information of the base station to the UE, which requires the UE to feed back downlink channel information to each base station in the cooperation set, and the feedback amount is large.
  • the base station can obtain the downlink channel information by measuring the SRS and then using the channel reciprocity.
  • how to properly configure the SRS transmission thereby improving the channel estimation quality of the SRS by the receiving end (base station) is a problem to be solved, and no specific Implementation plan.
  • the main object of the present invention is to provide a method and system for transmitting measurement reference signals for a coordinated multi-point transmission system, which can improve the channel estimation quality of the SRS by the base station and greatly reduce the feedback amount of the UE.
  • a method for transmitting a measurement reference signal for a coordinated multi-point transmission system comprising: transmitting, by a base station, configuration information of a measurement reference signal SRS and transmitting the configuration information to a user terminal;
  • the user terminal transmits an SRS to the base station according to the obtained configuration information.
  • the setting configuration information for sending the SRS includes:
  • the cell-specific subframe period and the cell-specific subframe offset ⁇ SFC of each cell of the coordinated multi-point transmission system cooperation set in the configuration information are set to be consistent.
  • the setting configuration information for sending the SRS includes:
  • the transmit power of the time-frequency resource location that matches the time-frequency location occupied by the SRS transmission information of the serving cell is set to 0; or in the configuration information of the coordinated cell, the setting is cancelled or masked. Selecting data or SRS in the coordinated cell that overlaps with the time-frequency resource location where the SRS transmission information of the serving cell is located; or selecting according to the received SRS resource occupation information and/or parameter configuration information of the base station from the coordinated cell or the neighboring cell.
  • the base station sets the configuration information of the measurement reference signal SRS and sends the configuration information to the user terminal, and the method further includes: the base station sending a message to the base station of the neighboring cell, where the message includes the SRS resource occupation information and/or the parameter. Configuration information.
  • the base station sends a message to the base station of the neighboring cell through the X2 interface.
  • the SRS resource occupation information and/or parameter configuration information includes: an SRS occupation indication on each physical resource block, and/or a frequency comb position occupancy indication of the SRS, and/or a SRS transmission sequence J
  • the method further includes: increasing the number of frequency combs of the SRS to a coordinated multipoint transmission system to
  • the setting of the configuration information for sending the SRS includes: setting, in the configuration information, the UE that uses the coordinated multipoint transmission in the serving cell and the UE of the coordinated cell to perform orthogonal multiplexing by means of frequency division multiplexing FDM; or setting the use in the serving cell
  • the coordinated multi-point transmission UE and the coordinated cell UE respectively use different frequency combs.
  • the method further includes: between the cooperative sets, between the base stations through the X2 interface, or through the base station
  • the interface of the part interacts with the configuration information of each cell, and/or the cells of the cooperation set
  • the SRS resource occupation information and/or parameter configuration information is sent to a base station of a neighboring cell through an X2 interface.
  • the interaction includes: interacting the SRS resource occupation information and/or parameter configuration information between the base stations through the X2 interface or for a message for CoMP related information interaction.
  • the cells in the collaboration set are synchronized with each other.
  • a measurement reference signal transmission system for a coordinated multipoint transmission system including a base station and a user terminal, wherein
  • a base station configured to send configuration information of the SRS and send the configuration information to the user terminal;
  • the user terminal is configured to send an SRS to the base station according to the obtained configuration information.
  • the base station is specifically configured to:
  • the transmit power of the time-frequency resource location that matches the time-frequency location occupied by the SRS transmission information of the serving cell is set to 0; or in the configuration information of the coordinated cell, the setting is cancelled or masked.
  • the configuration information is used to avoid scheduling cell edge users in the cell on the physical resource block concerned by the SRS resource occupation information and/or parameter configuration information.
  • the base station sets the configuration information of the measurement reference signal SRS and sends the configuration information to the user terminal, and the method further includes: the base station sending a message to the base station of the neighboring cell, where the message includes SRS resource occupancy information and/or parameter configuration information.
  • the base station sends a message to the base station of the neighboring cell through the X2 interface.
  • the SRS resource occupation information and/or parameter configuration information includes: an SRS occupation indication on each physical resource block, and/or a frequency comb location occupancy indication of the SRS, and/or a SRS transmission sequence, and/or an SRS transmission bandwidth. And/or SRS starting physical resource block location, and/or user-specific SRS period and subframe offset index, and/or SRS hopping bandwidth, and/or SRS cyclic shift, and/or SRS
  • the number of transmit antennas, and/or the duration of the SRS, or, in a coordinated multipoint transmission system increase the number of frequency combs of the SRS to 3 or 4, and set the coordinated multipoint in the serving cell in the configuration information.
  • the transmitted UE and the UE of the coordinated cell perform orthogonal multiplexing in a frequency division multiplexing manner; or the UE in the serving cell that uses coordinated multipoint transmission and the UE in the coordinated cell respectively use different frequency combs.
  • the base station sets the configuration information of the SRS to be sent to the user terminal, and the user terminal sends the SRS to the base station according to the obtained configuration information.
  • the channel estimation quality of the SRS is improved by each base station in the cooperation set, so that the base station can use the channel reciprocity to obtain the downlink channel information, which greatly reduces the feedback amount of the UE.
  • FIG. 1B is a schematic diagram of a DMRS time domain position when a normal cyclic prefix is used in the prior art
  • FIG. 1b is a schematic diagram of a DMRS time domain position when an extended cyclic prefix is used in the prior art
  • FIG. 3 is a schematic diagram of the frequency domain initial position of the UE transmitting different SMSs in the prior art
  • FIG. 4 is a schematic view of a comb structure of a prior art SRS
  • FIG. 5 is a flowchart of an SRS configuration method for a coordinated multipoint transmission system according to the present invention. detailed description
  • FIG. 5 is a flowchart of a method for configuring an SRS for a coordinated multipoint transmission system according to the present invention. As shown in FIG. 5, the method includes:
  • Step 500 The base station sets the configuration information of the SRS to be sent to the user terminal.
  • the method for setting the configuration information for sending SRS is as follows:
  • the cell-specific subframe period FC and the cell-specific subframe offset ⁇ of each cell of the coordinated multi-point transmission system cooperation set in the configuration information are set to be consistent, so that each cell in the cooperation group transmits the SRS at the same time, thereby improving The quality of the channel estimate; or,
  • the transmit power of the time-frequency resource location that matches the time-frequency location occupied by the SRS transmission information of the serving cell is set to 0, where the coordinated cell base station of the coordinated multi-point transmission system can pass the high-level letter.
  • the configuration information is indicated to the UE in the cell; or in the configuration information of the coordinated cell, the time-frequency resource location where the SRS transmission information in the coordinated cell and the serving cell is located is set or dropped Overlapping data or SRS; or, according to the received SRS resource occupation information and/or parameter configuration information of the base station from the coordinated cell or the neighboring cell, selecting the SRS frequency domain position of the coordinated cell or the neighboring cell base station does not overlap
  • the location is the SRS frequency domain location of the current cell; or the SRS resource occupation information and/or parameter configuration information from the coordinated cell or the neighboring cell base station is received, and the SRS resource occupation information and/or parameters are avoided as much as possible.
  • the cell edge user in the cell is scheduled on the physical resource block concerned by the configuration information.
  • the base station sets the configuration information of the measurement reference signal SRS and sends the configuration information to the user terminal, and the method further includes: the base station sending a message to the base station of the neighboring cell, where the message includes the SRS resource occupation information and/or the parameter configuration information. .
  • the base station sends a message to the base station of the neighboring cell through the X2 interface.
  • the SRS resource occupation information and/or parameter configuration information includes: an SRS occupation indication on each physical resource block, and/or a frequency comb position occupancy indication of the SRS, and/or a SRS transmission sequence.
  • the number of frequency combs of the SRS is increased to 3 or 4, and the UE in the serving cell using the coordinated multipoint transmission and the UE in the coordinated cell are frequency division multiplexed (FDM) in the configuration information.
  • the method performs orthogonal multiplexing, that is, respectively, using different frequency combs, or setting UEs that use coordinated multipoint transmission in the serving cell and UEs of the coordinated cell to use different frequency combs respectively.
  • the step further includes: performing, by using the X2 interface, the base station by using the configuration information of the cells of the cooperation set and/or the SRS resource occupation information and/or the parameter configuration information of the cells in the cooperation set.
  • Inter cite/cell or interact within the base station (intra cite/cell) through an interface inside the base station.
  • the cells in the collaborative set are synchronized with each other.
  • Step 501 The user terminal sends an SRS to the base station according to the obtained configuration information.
  • the receiving end can use the linear minimum mean square error (LMMSE) or the minimum mean square error (MMSE) or other channel estimation methods to perform accurate channel on the received SRS according to the configuration information of the cooperative centralized interaction. It is estimated to achieve reliable coordinated multi-point downlink transmission.
  • LMMSE linear minimum mean square error
  • MMSE minimum mean square error
  • the specific implementation method of the channel estimation does not belong to the protection scope of the present invention, and the specific implementation thereof is not limited to the scope of protection of the present invention.
  • a method for transmitting a reference signal transmission system for a coordinated multipoint transmission system including a base station and a user terminal,
  • the base station is configured to send configuration information of the SRS and send the configuration information to the user terminal.
  • the method is specifically configured to: set a cell-specific subframe period and a cell-specific subframe offset ⁇ of each cell of the coordinated multi-point transmission system cooperation set in the configuration information to be consistent; or
  • the coordinated cell base station of the coordinated multi-point transmission system may indicate the configuration information to the UE in the cell by using the high layer signaling; or in the configuration information of the coordinated cell.
  • the SRS resource occupation information and/or parameter configuration information of the base station is selected as a location of the SRS frequency domain of the current cell that does not overlap with the SRS frequency domain location of the coordinated cell or the neighboring cell base station; or according to the received coordinated cell or
  • the SRS resource occupation information and/or parameter configuration information of the neighboring cell base station is used to avoid scheduling the cell edge users in the current cell on the physical resource block concerned by the SRS resource occupation information and/or the parameter configuration information.
  • the base station sets the configuration information of the measurement reference signal SRS and sends the configuration information to the user terminal, and the method further includes: the base station sending a message to the base station of the neighboring cell, where the message includes the SRS resource occupation information and/or the parameter configuration information. .
  • the base station sends a message to the base station of the neighboring cell through the X2 interface.
  • the SRS resource occupation information and/or parameter configuration information includes: an SRS occupation indication on each physical resource block, and/or a frequency comb position occupancy indication of the SRS, and/or a SRS transmission sequence J
  • the UE-specific SRS parameter information sent by the X2 interface that is, the information content of the interaction includes one or several UE-specific SRS parameters:
  • the bandwidth of SRS ( srs-Bandwidth/srs-BandwidthAp ) is set to: ENUMERATED ⁇ bwO, bwl , bw2, bw3 ⁇ ;
  • the bandwidth of the frequency domain Hopping ( srs-HoppingBandwidth ) is set to: ENUMERATED ⁇ hbwO, hbwl , hbw2, hbw3 ⁇ ;
  • the starting position of the allocated physical resource block ( freqDomainPosition/freqDomainPositionAp ), set to: NTEGER ( 0...23 );
  • SRS transmission period (single or until not enabled) (duration), set to BOOLEAN;
  • the SRS configuration index ( srs-Configlndex/srs-ConfiglndexAp ) represents the period and start subframe, set to INTEGER (0..1023 ) /INTEGER (0..32 );
  • the transmission structure ( transmissionComb/transmissionCombAp ) is set to INTEGER (0, 1, 2, 3 );
  • the cyclic shift amount of the sequence (cyclicShift/cyclicShiftAp) is set to ENUMERATED ⁇ csO, csl, cs2, cs3, cs4, cs5, cs6, cs7 ⁇ .
  • SRS transmit antenna number ( srs-AntennaPort/srs-AntennaPortAp ), set to INTEGER (0, 1, 2, 4);
  • the IE format is shown in Table 3 below:
  • the number of frequency combs of the SRS is increased to 3 or 4, and the UE in the serving cell using the coordinated multipoint transmission and the UE in the coordinated cell are frequency division multiplexed (FDM) in the configuration information.
  • the method performs orthogonal multiplexing, that is, respectively using different frequency combs; or setting UEs using coordinated multipoint transmission in the serving cell and UEs of the coordinated cell respectively using different frequency combs.
  • the user terminal is configured to send an SRS to the base station according to the obtained configuration information.
  • the first embodiment is configured to set, in the configuration information, a cell-specific subframe period ⁇ and a cell-specific subframe offset of each cell of the coordinated multi-point transmission system cooperation set to be consistent,
  • the SRS resource occupation information and/or parameter configuration information of each cell in the configuration information and/or the cooperation set interacts between the collaboration sets.
  • the configuration information of each cell of the cooperation set interacts between the base stations (inter cite/cell) or through the internal interface of the base station (intra cite/cell) through the X2 interface.
  • the base station performs accurate channel estimation on the received SRS using a linear minimum mean square error (LMMSE) channel estimation method according to the configuration information of the cooperative centralized interaction.
  • LMMSE linear minimum mean square error
  • the channel estimation method of the LMMSE is as shown in the formula (1), and the channel estimation of the kth user or kth transmitting and receiving antenna link is:
  • H k ⁇ E(h k h k H )S k H ( ⁇ P ⁇ EihA ⁇ S " + R I + a 2 I eye r l y
  • A is the transmit power of the kth user or kth transmit and receive antenna link, indicating the frequency domain correlation value of the kth user or kth transmit receive antenna link , the SRS symbol sequence to user k or k-th receive antenna transmission link transmission
  • [eta] is the conjugate transpose
  • R £ ⁇ x ff ⁇ , / other cell interference for a user, a cooperating set from the cells
  • 2 is the noise power
  • y is the signal received by the receiver.
  • the base station After estimating the channel, the base station uses channel reciprocity to obtain downlink channel information to implement Reliable collaborative multi-point downlink transmission.
  • the coordinated cell base station of the coordinated multi-point transmission system indicates that the UE in the cell sets the transmit power of the corresponding time-frequency resource location to 0 through the high-layer signaling.
  • the time-frequency resource location is consistent with the time-frequency location occupied by the SRS transmission information of the serving cell; or, the location of the time-frequency resource in which the SRS transmission information of the serving cell overlaps with the serving cell is overlapped or muted Data or SRS; or, according to the received SRS occupation indication information from the coordinated cell base station, selecting a location that does not overlap with the SRS frequency domain location of the coordinated cell base station as the SRS frequency domain location of the local cell; or, according to the received
  • the SRS occupation indication information from the coordinated cell base station is used to avoid scheduling the cell edge users in the local cell on the physical resource block concerned by the SRS occupation indication information. And, the configuration information of each cell of the cooperation set and/or the SRS occupation indication information of each cell in the cooperation set are exchanged between the cooperation sets.
  • the configuration information of each cell of the cooperation set interacts between the base stations (inter cite/cell) or through the internal interface of the base station (intra cite/cell) through the X2 interface.
  • the base station performs accurate channel estimation on the received SRS using a linear minimum mean square error (LMMSE) channel estimation method according to the configuration information of the cooperative centralized interaction.
  • LMMSE linear minimum mean square error
  • the SRS received by the receiving end has a neighboring area of ⁇ , especially 0.
  • the channel estimation method of LMMSE is as shown in formula (1), wherein
  • R jE ⁇ x ff ⁇ , / is the user interference of other cells, is 0.
  • the base station After estimating the channel ⁇ , the base station uses the channel reciprocity to obtain the downlink channel information to achieve reliable coordinated multi-point downlink transmission.
  • the third embodiment is configured to increase the number of frequency combs of the SRS to 3 or 4 in the coordinated multipoint transmission system, and set, in the configuration information, the UE in the serving cell that uses the coordinated multipoint transmission and the UE in the coordinated cell.
  • the multiplexing multiplexing method performs orthogonal multiplexing, that is, different frequency combs are respectively used; or the UEs that use coordinated multipoint transmission in the serving cell and the UEs of the coordinated cell respectively use different frequency combs.
  • Coordination set configuration information of each cell and/or SRS occupation indication information of each cell in the cooperation set Interact between collaboration sets.
  • the interference problem between the serving cell CoMP UE and the coordinated cell non-CoMP UE is solved in an FDM manner by using different frequency comb combs for neighboring cells.
  • the transmission information and/or configuration information of each cell of the cooperation set interacts between the base stations (inter cite/cell) or through the internal interface of the base station (intra cite/cell) through the X2 interface.
  • the base station performs accurate channel estimation on the received SRS using a linear minimum mean square error (LMMSE) channel estimation method according to the configuration information of the cooperative centralized interaction.
  • LMMSE linear minimum mean square error
  • the SRS received by the receiving end has a neighboring zone interference of zero.
  • the base station uses channel reciprocity to obtain downlink channel information to achieve reliable coordinated multi-point downlink transmission.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention porte sur un procédé et un système d'envoi d'un signal de référence de sondage (SRS) utilisés pour un système de transmission multipoint coordonné. Le procédé comprend les opérations suivantes : une station de base règle des informations de configuration pour envoyer un SRS et délivre les informations de configuration à un terminal utilisateur, et le terminal utilisateur envoie, conformément aux informations de configuration obtenues, le SRS à la station de base. Par le procédé de la présente invention, la qualité d'estimation de canal SRS par chaque station de base dans un ensemble coordonné est améliorée, de sorte que la station de base puisse obtenir des informations de canal de liaison descendante par utilisation d'une réciprocité de canal, ce qui permet ainsi de réduire fortement la quantité de rétroaction d'un UE.
PCT/CN2011/078741 2010-12-31 2011-08-23 Procédé et système d'envoi de signal de référence de sondage utilisés pour un système de transmission multipoint coordonné Ceased WO2012088902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010617303.XA CN102065557B (zh) 2010-12-31 2010-12-31 用于协作多点传输系统的测量参考信号发送方法及系统
CN201010617303.X 2010-12-31

Publications (1)

Publication Number Publication Date
WO2012088902A1 true WO2012088902A1 (fr) 2012-07-05

Family

ID=44000585

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/078741 Ceased WO2012088902A1 (fr) 2010-12-31 2011-08-23 Procédé et système d'envoi de signal de référence de sondage utilisés pour un système de transmission multipoint coordonné

Country Status (2)

Country Link
CN (1) CN102065557B (fr)
WO (1) WO2012088902A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI703878B (zh) * 2015-03-14 2020-09-01 美商高通公司 互反頻道之聲探參考信號之多工

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102065557B (zh) * 2010-12-31 2016-03-30 中兴通讯股份有限公司 用于协作多点传输系统的测量参考信号发送方法及系统
CN102857957B (zh) * 2011-06-29 2017-10-03 中兴通讯股份有限公司 具有互易性的移动通信系统的信号处理方法及其装置
CN102395163B (zh) * 2011-06-30 2017-09-15 中兴通讯股份有限公司 协作多点传输系统中信息的交互方法及协作多点传输系统
CN102427396A (zh) * 2011-08-15 2012-04-25 中兴通讯股份有限公司 一种小区间上行解调参考信号的信息交互方法和基站
CN103427960A (zh) * 2012-05-14 2013-12-04 上海贝尔股份有限公司 多点协作的信息反馈方法与装置
CN103428723B (zh) * 2012-05-25 2016-06-15 上海贝尔股份有限公司 多点协作中测量srs的方法与设备
WO2014008661A1 (fr) * 2012-07-13 2014-01-16 华为技术有限公司 Procédé et équipement d'attribution de ressources
TW201818762A (zh) * 2012-07-23 2018-05-16 美商內數位專利控股公司 在ｄｓｓ蘋帶唯上鏈操作中頻率同步、功率控制及胞元配置方法及裝置
CN104521156B (zh) * 2012-08-03 2019-07-30 德克萨斯仪器股份有限公司 用于协作多点通信的上行链路信令
CN104104625B (zh) 2013-04-10 2019-03-15 中兴通讯股份有限公司 保证预编码后rb组间信道相位连续性的方法和基站
CN104796232A (zh) * 2014-01-18 2015-07-22 上海朗帛通信技术有限公司 一种在非授权频谱上的传输方法和装置
CN104320220B (zh) * 2014-10-31 2017-07-11 武汉邮电科学研究院 一种上行多点协作的方法及系统
CN106922207B (zh) * 2014-12-16 2020-08-11 富士通株式会社 基于探测参考信号的下行信道估计方法、装置以及通信系统
US10075271B2 (en) * 2015-03-14 2018-09-11 Qualcomm Incorporated Reciprocal channel sounding reference signal allocation and configuration
CN106375074A (zh) * 2015-07-21 2017-02-01 中兴通讯股份有限公司 一种测量参考信号的传输方法及系统
CN108134624B (zh) * 2016-12-01 2020-06-30 维沃移动通信有限公司 一种参考信号发送、接收方法、发送端及接收端
CN108282285B (zh) * 2017-01-05 2020-06-02 华为技术有限公司 信号传输方法和装置
CN108667579B (zh) 2017-03-30 2021-08-03 华为技术有限公司 一种数据发送方法、相关设备及系统
CN110912664B (zh) * 2018-09-17 2022-08-05 中国移动通信有限公司研究院 一种信息配置的方法和设备
CN111385823B (zh) * 2018-12-29 2023-08-01 南京中兴新软件有限责任公司 信号的处理方法及装置
CN118574231A (zh) * 2020-11-25 2024-08-30 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置
CN117296256A (zh) * 2022-04-26 2023-12-26 北京小米移动软件有限公司 无线通信方法、装置、通信设备及存储介质
CN116760667A (zh) * 2023-07-18 2023-09-15 北京航空航天大学 一种时分双工蜂窝网络下多小区信道联合估计的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101795145A (zh) * 2010-02-08 2010-08-04 中兴通讯股份有限公司 测量参考信号的发送方法及系统
CN101841921A (zh) * 2010-04-29 2010-09-22 北京邮电大学 协作多点场景下信道探测导频的发送方法
CN101848541A (zh) * 2009-03-27 2010-09-29 大唐移动通信设备有限公司 一种探测参考信号发送的方法及设备
CN102065557A (zh) * 2010-12-31 2011-05-18 中兴通讯股份有限公司 用于协作多点传输系统的测量参考信号发送方法及系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101848541A (zh) * 2009-03-27 2010-09-29 大唐移动通信设备有限公司 一种探测参考信号发送的方法及设备
CN101795145A (zh) * 2010-02-08 2010-08-04 中兴通讯股份有限公司 测量参考信号的发送方法及系统
CN101841921A (zh) * 2010-04-29 2010-09-22 北京邮电大学 协作多点场景下信道探测导频的发送方法
CN102065557A (zh) * 2010-12-31 2011-05-18 中兴通讯股份有限公司 用于协作多点传输系统的测量参考信号发送方法及系统

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI703878B (zh) * 2015-03-14 2020-09-01 美商高通公司 互反頻道之聲探參考信號之多工
US11374711B2 (en) 2015-03-14 2022-06-28 Qualcomm Incorporated Reciprocal channel sounding reference signal multiplexing
US11916826B2 (en) 2015-03-14 2024-02-27 Qualcomm Incorporated Reciprocal channel sounding reference signal multiplexing

Also Published As

Publication number Publication date
CN102065557B (zh) 2016-03-30
CN102065557A (zh) 2011-05-18

Similar Documents

Publication Publication Date Title
WO2012088902A1 (fr) Procédé et système d'envoi de signal de référence de sondage utilisés pour un système de transmission multipoint coordonné
CN114944903B (zh) 无线通信系统中终端和基站发送/接收信号的方法和设备
CN110754056B (zh) 在无线通信系统中发送和接收参考信号的方法及其设备
TWI492589B (zh) 加強探測參考訊號傳輸的方法及其通訊裝置
CN110392996B (zh) 在无线通信系统中跟踪相位噪声的方法及其装置
KR101757301B1 (ko) 프리코딩된 사운딩 참조신호를 이용하여 ｃｏｍｐ 통신을 수행하는 장치 및 그 방법
CN105122669B (zh) 在无线通信系统中报告信道状态信息的方法和设备
WO2012167589A1 (fr) Procédé et système d'envoi de signal srs
KR101979852B1 (ko) 무선 통신 시스템에서 채널상태정보 전송 방법 및 장치
CN104335499B (zh) 上行链路探测参考信号的传输
KR102140742B1 (ko) 무선 접속 시스템에서 tti 번들링 방법 및 이를 위한 장치
JP6208340B2 (ja) 無線通信システムにおいて信号送受信方法及び装置
US20130189930A1 (en) Flexible Radio Channel Sounding
WO2012019414A1 (fr) Trame radio et procédé d'envoi d'un signal de référence de sondage dans un système de communications mobiles
WO2010121538A1 (fr) Procédé de configuration de signal de sondage de référence et dispositif utilisé dans une transmission multipoint coordonnée
JP6608833B2 (ja) Ｆｄｒ伝送を支援する無線接続システムにおけるリソース割当て方法及び装置
JP2016197871A (ja) 無線通信システムにおいてチャネル状態情報（ｃｓｉ）送信方法及び装置
KR20150073971A (ko) 무선 통신 시스템에서 하향링크 제어 신호를 수신 또는 전송하기 위한 방법 및 이를 위한 장치
WO2013062386A1 (fr) Procédé et appareil de renvoi d'informations d'état de canal agrégées dans un système de transmission multipoint coordonnée
WO2016095110A1 (fr) Procédé et appareil d'estimation de canal de liaison descendante basés sur un signal de référence de sondage, et système de communication
CN107210988A (zh) 在无线通信系统中通过设备对设备通信终端产生信号的方法和装置
WO2013085336A1 (fr) Procédé et appareil pour émettre/recevoir un canal de commande descendant dans un système de communication sans fil
CN104094659A (zh) 无线基站装置、用户终端、无线通信系统以及无线通信方法
WO2011012087A1 (fr) Méthode, dispositif et système de transmission de signaux de sondage de référence
WO2013109060A1 (fr) Procédé et appareil pour la transmission de données sortantes dans un système de communication sans fil

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11853863

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11853863

Country of ref document: EP

Kind code of ref document: A1