WO2015081474A1 - Procédé de planification collaborative et dispositif réseau - Google Patents

Procédé de planification collaborative et dispositif réseau Download PDF

Info

Publication number
WO2015081474A1
WO2015081474A1 PCT/CN2013/088348 CN2013088348W WO2015081474A1 WO 2015081474 A1 WO2015081474 A1 WO 2015081474A1 CN 2013088348 W CN2013088348 W CN 2013088348W WO 2015081474 A1 WO2015081474 A1 WO 2015081474A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
network device
cell
phase
compensation amount
Prior art date
Application number
PCT/CN2013/088348
Other languages
English (en)
Chinese (zh)
Inventor
杨敬
陈拓
马霓
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380002987.4A priority Critical patent/CN103875292B/zh
Priority to PCT/CN2013/088348 priority patent/WO2015081474A1/fr
Publication of WO2015081474A1 publication Critical patent/WO2015081474A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes

Definitions

  • the present invention relates to the field of communications, and in particular, to a cooperative scheduling method and a network device. Background technique
  • RSRP Reference Signal Receiving Power
  • RSRQ Reference Signal Receiving Quality
  • the channel capacity of the cell may be saturated, which may easily cause the cell service throughput to fail to meet the user's needs, thereby further reducing the user experience.
  • the physical downlink control channel may be used in a multi-cell cooperation mode.
  • the PDCCH and the Physical Downlink Shared Channel (PDSCH) are transmitted in a separate manner, that is, the primary serving cell and the coordinated cell of the UE cooperate to provide communication services for the UE, and the PDCCH channel is delivered by the primary serving cell, PD SCH
  • the channel can be transmitted according to the state of the current channel, and the system side adaptively selects a coordinated cell with better channel quality by cooperation between multiple cells.
  • Embodiments of the present invention provide a cooperative scheduling method and apparatus, which can improve transmission performance in a case where multiple cells are not strictly synchronized.
  • a network device for a wireless communication system, in which a primary serving cell and a coordinated cell of a user terminal UE cooperate to provide a communication service for the UE, where the network device includes an acquiring unit and a control unit;
  • the acquiring unit is configured to acquire a phase compensation amount of the first signal relative to the second signal, where the first signal is a physical downlink shared channel PDSCH signal that is sent by the coordinated cell to the UE, and the second signal is a physical downlink control channel PDCCH signal transmitted to the UE by the primary serving cell;
  • the control unit is configured to control the coordinated cell to perform a phase precompensated first signal according to the phase compensation amount acquired by the acquiring unit, so that the phase precompensated first signal and the The second signal is synchronized.
  • the acquiring unit includes a first acquiring module and a determining module;
  • the first acquiring module is configured to acquire an uplink timing offset of the coordinated cell with respect to the primary serving cell;
  • the determining module is configured to determine a phase compensation amount of the first signal relative to the second signal according to the uplink timing deviation acquired by the first acquiring module.
  • the first acquiring module is specifically configured to:
  • the first acquiring module is specifically configured to:
  • first time point is a time when the uplink SRS arrives at the coordinated cell
  • second time Point is the time when the uplink SRS arrives at the primary serving cell
  • the determining module is specifically configured to:
  • the result of inverting the uplink timing offset and adding a preset first margin value is determined as the phase compensation amount.
  • control unit in combination with the first aspect to the fourth possible implementation manner of the first aspect, includes a second acquiring module and a sending module;
  • the second acquiring module is configured to acquire a first signal after performing phase pre-compensation according to the phase compensation amount
  • the sending module is configured to send the phase pre-compensated first signal acquired by the second acquiring module to the coordinated cell, and send, by the coordinated cell, the phase pre-compensated first signal.
  • control unit in combination with the first aspect to the fourth possible implementation manner of the first aspect, includes a sending module;
  • the sending module is configured to send the phase compensation amount to the coordinated cell, and acquire, by the coordinated cell, a first signal that is phase pre-compensated according to the phase compensation amount, and after the phase pre-compensation is transmitted The first signal.
  • control unit in combination with the first aspect to the first possible implementation manner of the first aspect, is specifically configured to:
  • X(k)' x(k)e ⁇ .
  • ⁇ the phase compensation amount
  • ⁇ a constant
  • N the Fourier transform length
  • a cooperative scheduling method for a wireless communication system, in which a primary serving cell and a coordinated cell of a user terminal UE cooperate to provide a communication service for the UE, and the method includes:
  • the network device acquires a phase compensation amount of the first signal relative to the second signal, where the first signal is a physical downlink shared channel PDSCH signal that is sent by the coordinated cell to the UE, and the second signal is the primary service a physical downlink control channel PDCCH signal transmitted by the cell to the UE;
  • the first signal is a physical downlink shared channel PDSCH signal that is sent by the coordinated cell to the UE
  • the second signal is the primary service a physical downlink control channel PDCCH signal transmitted by the cell to the UE
  • the network device controls the coordinated cell to transmit a first signal after phase pre-compensation according to the phase compensation amount, so that the phase pre-compensated first signal and the second signal are synchronized.
  • the acquiring, by the network device, the phase compensation amount of the first signal relative to the second signal includes:
  • the network device determines a phase compensation amount of the first signal relative to the second signal according to the uplink timing offset.
  • the first aspect of the second aspect is The implementation manner of the foregoing, the acquiring, by the network device, the uplink timing offset of the coordinated cell with respect to the primary serving cell includes:
  • the network device acquires a preset uplink timing offset of the coordinated cell with respect to the primary serving cell.
  • the network device when the uplink signal sent by the UE is transmitted on the coordinated cell, according to the real-time measurement result
  • the uplink timing offset relative to the transmission on the primary serving cell includes:
  • the network device obtains a first time point and a second time point according to the uplink sounding reference signal SRS that is sent by the UE, where the first time point is a time when the uplink SRS arrives at the coordinated cell, where The second time point is a time when the uplink SRS arrives at the primary serving cell;
  • the network device calculates the uplink timing offset according to the first time point and the second time point.
  • the network device determines, according to the uplink timing offset
  • the phase compensation amount of the first signal relative to the second signal includes:
  • the network device determines, after the inverse of the uplink timing offset, a result of adding a preset first margin value as the phase compensation amount.
  • the network device controls, after the phase-precompensation, the coordinated cell to perform phase pre-compensation according to the phase compensation amount
  • the first signal specifically includes:
  • the network device sends the phase pre-compensated first signal to the coordinated cell, and the phase pre-compensated first signal is transmitted by the coordinated cell.
  • the network device controls, after the phase-precompensation, the coordinated cell to perform phase pre-compensation according to the phase compensation amount
  • the first signal specifically includes:
  • Transmitting, by the network device, the phase compensation amount to the coordinated cell acquiring, by the coordinated cell, a first signal after phase precompensation according to the phase compensation amount, and transmitting the first phase after the phase precompensation signal.
  • the performing the phase pre-compensation according to the phase compensation amount includes:
  • ⁇ is a phase compensation amount; and is a constant;
  • N is a Fourier transform length.
  • a network device for a wireless communication system, in which a primary serving cell and a coordinated cell of a user terminal UE cooperate to provide a communication service for the UE, where the network device includes a processor and a memory.
  • the memory is in communication with the processor, the program code is stored in the memory, and the processor is configured to invoke program code stored in the memory to perform the method of any one of the second aspects.
  • An embodiment of the present invention provides a cooperative scheduling method and a network device, which are used in a wireless communication system, where a primary serving cell and a coordinated cell of a UE cooperate to provide a communication service for the UE, and the method includes: acquiring, by the network device a phase compensation amount of a signal relative to a second signal, where the first signal is a PDSCH signal transmitted by the coordinated cell to the UE, and the second signal is a PDCCH that is sent by the primary serving cell to the UE Signaling; then the network device controls the coordinated cell to transmit according to the phase The bit compensation amount performs a phase precompensated first signal such that the phase precompensated first signal and the second signal are synchronized.
  • phase pre-compensated first signal is offset with the phase compensation amount on the multipath of the delay spectrum with respect to the first signal, so that the second signal can be cooperatively scheduled. Synchronization can further avoid the situation that the time when the first signal arrives at the UE in the prior art is not synchronized with the time when the second signal arrives at the UE, thereby improving the transmission performance in the case where the multi-cell is not strictly synchronized.
  • FIG. 1 is a collaborative scheduling method according to Embodiment 1 of the present invention.
  • FIG. 2 is a scenario diagram of a time when a first signal arrives at a UE lags behind a time when a second signal arrives at a UE according to Embodiment 1 of the present invention
  • FIG. 3 is a scenario diagram of a time when a first signal arrives at a UE and a time when a second signal arrives at a UE according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic diagram of a PDCCH and PDSCH transmission separation according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic structural diagram 1 of a network device according to Embodiment 3 of the present invention
  • FIG. 7 is a schematic structural diagram 2 of a network device according to Embodiment 3 of the present invention
  • FIG. 8 is a schematic structural diagram 3 of a network device according to Embodiment 3 of the present invention
  • FIG. 10 is a schematic structural diagram of a network device according to Embodiment 4 of the present invention
  • An embodiment of the present invention provides a cooperative scheduling method, where the method is used in a wireless communication system, where a primary serving cell and a coordinated cell of a UE cooperate to provide a service for the UE, as shown in FIG. 1 .
  • it may include:
  • the network device acquires a phase compensation amount of the first signal with respect to the second signal, where the first signal is a PDSCH signal that is sent by the coordinated cell to the UE, and the second signal is the primary serving cell.
  • cooperative scheduling between multiple cells is performed by using a manner in which PDCCH and PDSCH are transmitted separately.
  • the network device determines that the UE is allocated a PDSCH in the coordinated cell, and the PDCCH is allocated in the primary serving cell, and the PDSCH signal sent by the coordinated cell to the UE is regarded as a first signal; the primary serving cell
  • the PDCCH signal transmitted to the UE is treated as a second signal.
  • the primary serving cell and the coordinated cell may be managed by the same base station, where the network device is located in the base station; and the primary serving cell and the coordinated cell may also be managed by different base stations, where the network The device is the base station of the primary serving cell and the upper-layer network device of the base station of the coordinated cell, which is not specifically limited in this embodiment of the present invention.
  • the manner in which the PDCCH and the PDSCH are transmitted separately is likely to cause the coordinated two cells to fail to perform accurate signal synchronization. Specifically, the following two situations may occur:
  • the UE performs synchronous tracking on the signal based on the Cell-specific Reference Signal (CRS) of the primary serving cell, and searches for the first-path position of the first signal as the timing synchronization point.
  • CRS Cell-specific Reference Signal
  • the UE may advance several sample points as the timing synchronization point of the UE on the basis of the first path position.
  • the UE performs the OFDM signal receiving process according to the new timing synchronization point.
  • the UE Before performing the time-frequency conversion, the UE performs the operation of the Cyclic prefix (CP). It can be seen from Fig. 2 that under the protection of the CP, several sampling points in advance as the timing synchronization point of the UE will not affect the acquisition of the complete OFDM signal.
  • CP Cyclic prefix
  • the UE does not significantly affect the reception processing of the signal if the lag value does not exceed the CP.
  • the CRS is a common pilot of the cell, and the specific sequence of the CRS and the occupied time-frequency location are related to the physical cell ID.
  • the UE performs downlink channel estimation, synchronization tracking, and downlink measurement based on the CRS.
  • 3GPP R 3rd Generation Partnership Project Release
  • 3GPP R9 3rd Generation Partnership Project R9
  • 3GPP RI O protocol the downlink PDCCH signaling is related to channel estimation and demodulation through CRS. code.
  • the UE performs synchronization tracking on the signal based on the CRS of the primary serving cell, and searches for the first path position of the first signal as a synchronization point.
  • the UE may be in the first path position. Based on several sample points in advance, the timing synchronization point of the UE is used.
  • the UE After the synchronization, the UE performs the OFDM signal reception process according to the new timing synchronization point. Before performing the time-frequency conversion, the UE performs the operation of removing the CP. As shown in FIG. 3, in this scenario, the UE does not receive the first signal. Complete, and will introduce the OFMD ISL. In the case of coordinated scheduling transmission, the signal of the coordinated cell of the UE and the primary serving cell may be out of synchronization, which may cause performance loss. Especially in the scenario of the above case 2, the performance loss is more serious.
  • DRS channel estimation usually uses Wiener filtering to improve performance.
  • Wiener filtering the Wiener filter coefficient in the frequency domain is usually a base. Produced by the prior model.
  • the non-specialized UE is calculated based on the Wiener filter coefficient of the prior model, the timing deviation problem of the UE is considered in the modeling.
  • the timing deviation is generally limited to several samples (tens of nanoseconds), but the timing deviation generated in at least one of the following cases, for example: Global Positioning System , GPS)
  • GPS Global Positioning System
  • There is a transmission delay of 3.3 ns if the air gap distance is 50 meters, it means a difference of 165 ns); the transmission delay deviation caused by the device is not ideal, so that the time when the first signal arrives at the UE and the time when the second signal arrives at the UE
  • the timing offset may be much more than a few tens of nanoseconds. This situation will cause the DRS channel estimation prior model to not match the real signal, which will seriously affect the performance of the DRS channel estimation.
  • the DRS is a user-specific demodulation pilot, which can directly carry the downlink precoding/beamforming weight, and can also directly carry the power information. Therefore, channel estimation by DRS can obtain equivalent weighted channel information, which means that the system side can achieve transparency of the UE's transmission weight and power information.
  • the network device acquires a phase compensation amount of the first signal with respect to the second signal, and the phase compensation amount may synchronize the phase pre-compensated first signal and the second signal in cooperative scheduling.
  • phase compensation amount can be obtained as follows:
  • the network device After acquiring the uplink timing offset of the coordinated cell with respect to the primary serving cell, the network device determines a phase compensation amount of the first signal relative to the second signal according to the uplink timing offset, where the uplink timing offset may be preset
  • the network device may also be obtained according to the real-time measurement result, which is not specifically limited in this embodiment of the present invention.
  • the network device controls the coordinated cell to transmit a first signal that is phase pre-compensated according to the phase compensation amount, so that the phase pre-compensated first signal and the second signal are synchronized.
  • the network device acquires a phase of the first signal relative to the second signal After the compensation amount, the network device controls the coordinated cell to transmit a first signal after phase pre-compensation according to the phase compensation amount.
  • the embodiment of the present invention provides a method for the following two network devices to control the coordinated cell to transmit the phase precompensated first signal:
  • the phase pre-compensation is performed on the first signal according to the phase compensation amount, and the first signal after phase pre-compensation is obtained, and then the phase pre-compensation is performed. And transmitting a first signal to the coordinated cell, where the phase pre-compensated first signal is transmitted by the coordinated cell;
  • Manner 2 The network device sends the obtained phase compensation amount to the coordinated cell, and the coordinated cell performs phase pre-compensation on the first signal according to the phase compensation amount, and obtains phase pre-compensation.
  • the phase pre-compensated first signal is transmitted after the first signal.
  • the embodiment of the present invention does not specifically limit the manner in which the network device controls the coordinated cell to transmit the phase pre-compensated first signal.
  • the method for performing phase pre-compensation on the first signal by the network device or the coordinated cell according to the phase compensation amount may be as follows:
  • the first signal is phase precompensated in combination with the formula (1).
  • N x(k)e N Equation (1)
  • ⁇ is the phase compensation amount
  • ⁇ is the phase compensation amount
  • ⁇ is a constant
  • N is the Fourier transform length, depending on the bandwidth of the coordinated cell. Exemplarily, if it is a 20M bandwidth, N can be set to 2048; if it is 10M Bandwidth, then N can be set to 1024.
  • the phase precompensated first signal can be obtained.
  • An embodiment of the present invention provides a cooperative scheduling method, where the method is used in a wireless communication system, where a primary serving cell and a coordinated cell of a UE cooperate to provide the UE
  • the communication service includes: the network device acquiring a phase compensation amount of the first signal relative to the second signal, where the first signal is a PDSCH signal that is sent by the coordinated cell to the UE, and the second signal is Transmitting, by the primary serving cell, a PD C CH signal to the UE; and then the network device controls the coordinated cell to transmit a first signal after phase pre-compensation according to the phase compensation amount.
  • the phase pre-compensated first signal is offset with the phase compensation amount on the multipath of the delay spectrum with respect to the first signal, so that the second signal can be cooperatively scheduled.
  • the synchronization can prevent the situation that the time when the first signal arrives at the UE in the prior art is not synchronized with the time when the second signal arrives at the UE, thereby improving the transmission performance in the case where the multi-cell is not strictly synchronized.
  • An embodiment of the present invention provides a cooperative scheduling method, where the method is used in a wireless communication system, in which a primary serving cell and a coordinated cell of a UE cooperate to provide a service for the UE, and the embodiment of the present invention combines a PDSCH and a PDCCH to transmit a separate signal.
  • the description of the technology, as shown in Figure 4, includes:
  • the network device determines that the UE is allocated a PDSCH in the coordinated cell, and a PDCCH is allocated in the primary serving cell.
  • the PDCCH and the PDSCH may be separately transmitted in a multi-cell cooperative manner.
  • the embodiment of the present invention firstly provides the following conditions for the network device to determine cooperative scheduling for the UE:
  • the system side identifies the user capability, and identifies the protocol version supported by the UE and the Multiple-Input Multiple-Out-put (MIMO) capability.
  • MIMO Multiple-Input Multiple-Out-put
  • the protocol version supported by the UE may be a CRS-based transmission mode (transmission mode, ⁇ ) 2, ⁇ 3, ⁇ 4, ⁇ 5, ⁇ 6; or the protocol version supported by the UE may be DRS-based ⁇ 7, 8, 9 10;
  • transmission mode transmission mode 2, ⁇ 3, ⁇ 4, ⁇ 5, ⁇ 6
  • DRS-based ⁇ 7, 8, 9 10 transmission mode 2, ⁇ 3, ⁇ 4, ⁇ 5, ⁇ 6; or the protocol version supported by the UE may be DRS-based ⁇ 7, 8, 9 10;
  • the version is not specifically limited.
  • TM7 is the R8 protocol feature
  • TM8 is the R9 protocol feature
  • TM9 is the R10 protocol feature
  • TM 10 is the R1 1 post-protocol feature.
  • the base station of each serving cell receives relevant measurement parameters fed back by the UE, for example, RSRP, RSRQ, and the like of the serving cell and the neighboring cell, and receives channel quality indicator (CQI) measurement information of each service cell.
  • relevant measurement parameters fed back by the UE for example, RSRP, RSRQ, and the like of the serving cell and the neighboring cell, and receives channel quality indicator (CQI) measurement information of each service cell.
  • CQI channel quality indicator
  • the system side determines whether the UE is at the edge of the serving cell according to the relevant measurement parameters fed back by the UE and the received CQI of each serving cell.
  • whether the UE is at the cell edge may be determined according to the reference signal received power RSRP. For example, if the RSRP of the serving cell is the RSRP of the neighboring cell, it may be determined that the UE is at the edge of the serving cell.
  • the edge UE with DRS determines to cooperatively schedule and transmit the UE.
  • the specific process of separating the PDCCH and the PDSCH from the UE may be briefly described as follows:
  • R8 edge users it is switched to TM7 mode through high-level signaling; for R9 edge users, it is switched to TM8 mode through high-level signaling; for R10 edge users, It is switched to TM9 mode by high-level signaling, and for R1 1 edge users, it is switched to TM 10 mode by higher layer signaling.
  • the network device determines that the UE is allocated a PDSCH in the coordinated cell, and a PDCCH is allocated in the primary serving cell.
  • the PDSCH is allocated to the UE by the coordinated cell of the UE, and the PDCCH is allocated by the primary serving cell of the UE to the UE because the signaling packet is transmitted by the primary serving cell (ie, the serving cell) to make the whole
  • the cooperative scheduling process does not feel the handover, and the transmission of the data packet by the coordinated cell (ie, the neighboring cell) can alleviate the channel load of the primary serving cell, thereby enabling the user to obtain better quality of service without feeling the handover. , improve user experience, and avoid the frequency of ping-pong switching It happens.
  • FIG. 5 is only a scenario diagram showing a separation of PDCCH and PDSCH transmission.
  • the primary serving cell and the coordinated cell are managed by different base stations, where the network device is The base station of the primary serving cell and the upper-layer network device of the base station of the coordinated cell, but as described in step 101, the primary serving cell and the coordinated cell may also be managed by the same base station, which is in the embodiment of the present invention. This is not specifically limited.
  • the network device acquires an uplink timing offset of the coordinated cell with respect to the primary serving cell.
  • the network device may obtain the uplink timing offset by:
  • the uplink timing deviation of the cell of the UE relative to the primary service cell is pre-stored in the network device, and the network device may obtain the preset uplink timing offset.
  • the uplink timing offset is a priori information for the coordinated cell of the UE, and is applicable to all UEs that access the coordinated cell, and may be performed according to multiple times of real-time measurement of the uplink timing offset of the coordinated cell and the serving cell.
  • the statistical determination is not specifically limited in the embodiment of the present invention.
  • the network device may obtain the uplink timing offset by:
  • a method for obtaining, by the network device, an uplink timing offset when the uplink signal transmitted by the UE is transmitted on the coordinated cell with respect to the uplink serving cell according to the real-time measurement result is as follows:
  • the network device obtains a first time point and a second time point according to the pilot of the sounding reference signal (SRS) sent by the UE, where the first time point is the uplink The time when the SRS arrives at the coordinated cell, and the second time point is that the uplink SRS arrives at the primary service The time of the community.
  • SRS sounding reference signal
  • the pilot of the uplink SRS is mainly used for measuring and estimating the quality of the uplink channel, and calculating a signal to interference plus noise ratio (SINR) of the uplink channel, specifically for supporting the UE.
  • SINR signal to interference plus noise ratio
  • the first time point and the second time point can be measured by the uplink SRS pilot.
  • the network device calculates the uplink timing offset according to the first time point and the second time point. That is, the difference between the first time point and the second time point may be specifically obtained, thereby acquiring the uplink timing deviation, that is,
  • Upstream timing deviation first time point-second time point formula (2) It can be seen from the formula (2) that the uplink timing deviation may be a positive value or a negative value, which is not used by the embodiment of the present invention. Specifically limited.
  • the network device determines, according to the uplink timing offset, a phase compensation amount of the first signal relative to the second signal.
  • the first signal is a PDSCH signal that is sent by the coordinated cell to the UE
  • the second signal is a PDCCH signal that is sent by the primary serving cell to the UE.
  • the embodiment of the present invention may estimate the phase compensation amount according to the uplink timing offset.
  • the result of the inverse of the uplink timing offset may be determined as a phase compensation amount; or, in combination with the analysis of the first case in the embodiment shown in FIG. 1, when the first signal arrives at the UE during cooperative scheduling, The time lags behind the time when the second signal arrives at the UE. If the hysteresis value does not exceed the CP, the acquisition of the complete OFDM signal is not affected.
  • the result of the inverse of the uplink timing offset and the preset first margin value is determined as The phase compensation amount, wherein the first margin value may be a positive number or a negative number, which is not specifically limited in the embodiment of the present invention, and the value of the first margin is in a range from 0 to CP.
  • the network device controls the coordinated cell to transmit a first signal that is phase pre-compensated according to the phase compensation amount, so that the phase pre-compensated first signal and the second signal are synchronized. Specifically, after the network device acquires a phase compensation amount of the first signal with respect to the second signal, the network device controls the coordinated cell to transmit a first signal that is phase pre-compensated according to the phase compensation amount.
  • the method for the network device to control the phase-precompensated first signal of the coordinated cell may be referred to the description of step 102 in the embodiment shown in FIG. 1 , and details are not described herein again.
  • the method for the phase pre-compensation of the first signal by the network device or the coordinated cell of the UE may refer to the description of step 102 in the embodiment shown in FIG. 1 , and details are not described herein again. .
  • An embodiment of the present invention provides a cooperative scheduling method, where the method is used in a wireless communication system, where a primary serving cell and a coordinated cell of a UE cooperate to provide a communication service for the UE, and the method includes: acquiring, by the network device a phase compensation amount of a signal relative to the second signal, wherein the first signal is a PDSCH signal transmitted by the coordinated cell to the UE, and the second signal is a PD that is sent by the primary serving cell to the UE C CH signal; then the network device controls the coordinated cell to transmit a first signal after phase pre-compensation according to the phase compensation amount.
  • the phase pre-compensated first signal is offset with the phase compensation amount on the multipath of the delay spectrum with respect to the first signal, so that the second signal can be cooperatively scheduled.
  • the synchronization can prevent the situation that the time when the first signal arrives at the UE in the prior art is not synchronized with the time when the second signal arrives at the UE, thereby improving the transmission performance in the case where the multi-cell is not strictly synchronized.
  • An embodiment of the present invention provides a network device 600, which is used in a wireless communication system, where a primary serving cell and a coordinated cell of a user terminal UE cooperate to provide a communication service for the UE, and the network device 600 in this embodiment can use
  • the network device 600 includes an obtaining unit 601 and a control unit 602.
  • the obtaining unit 601 is configured to acquire a phase of the first signal relative to the second signal a compensation amount, where the first signal is a physical downlink shared channel PDSCH signal that is sent by the coordinated cell to the UE, and the second signal is a physical downlink control channel PDCCH signal that is sent by the primary serving cell to the UE .
  • the control unit 602 is configured to control the coordinated cell to perform a phase precompensated first signal according to the phase compensation amount acquired by the acquiring unit 601, so that the phase precompensated first signal and The second signal is synchronized.
  • the acquiring unit 601 specifically includes a first acquiring module 601 1 and a determining module 6012.
  • the first obtaining module 601 1 is configured to acquire an uplink timing offset of the coordinated cell with respect to the primary serving cell.
  • the determining module 6012 is configured to determine a phase compensation amount of the first signal relative to the second signal according to the uplink timing offset acquired by the first acquiring module 601 1 .
  • the first acquiring module 601 1 is specifically configured to acquire an uplink timing offset of the coordinated cell with respect to the primary serving cell as follows:
  • the first obtaining module 601 1 obtains, according to the real-time measurement result, an uplink timing offset when the uplink signal transmitted by the UE is transmitted on the coordinated cell, and when it is transmitted on the primary serving cell, specifically:
  • first time point is a time when the uplink SRS arrives at the coordinated cell
  • second time Point is the time when the uplink SRS arrives at the primary serving cell
  • the determining module 6012 is specifically configured to determine, according to the uplink timing offset acquired by the first acquiring module 601 1 , a phase compensation amount of the first signal relative to the second signal:
  • the result of inverting the uplink timing offset and adding a preset first margin value is determined as the phase compensation amount.
  • control unit 602 may control the coordinated cell to transmit the first signal after the phase pre-compensation according to the phase compensation amount acquired by the acquiring unit 601 as follows:
  • control unit 602 includes a second obtaining module 6021 and a sending module 6022.
  • the second obtaining module 6021 is configured to acquire a first signal after phase precompensation according to the phase compensation amount.
  • the sending module 6022 is configured to send the phase pre-compensated first signal acquired by the second acquiring module 6021 to the coordinated cell, and send the phase pre-compensated first by the coordinated cell. signal.
  • control unit 602 specifically includes a sending module 6022.
  • the sending module 6022 is configured to send the phase compensation amount to the coordinated cell, obtain, by the coordinated cell, a first signal that is phase pre-compensated according to the phase compensation amount, and transmit the phase pre-compensation After the first signal.
  • control unit 602 is specifically configured to:
  • the method for performing the cooperative scheduling by using the network device 600 may be referred to the description of the first embodiment or the second embodiment, and details are not described herein again.
  • An embodiment of the present invention provides a network device, where the primary serving cell and the coordinated cell of the UE cooperate to provide a communication service for the UE, where the acquiring unit acquires the first signal relative to the second signal.
  • a phase compensation amount where the first signal is a physical downlink shared channel PDSCH signal transmitted by the coordinated cell to the UE, and the second signal is a physical downlink control channel that is sent by the primary serving cell to the UE a PDCCH signal;
  • the control unit controls the coordinated cell to transmit a phase precompensated first signal according to the phase compensation amount acquired by the acquiring unit, so that the phase precompensated first signal and the second Signal synchronization.
  • the control unit controls the phase pre-compensated first signal transmitted by the coordinated cell to perform the same degree of offset as the phase compensation amount on the multipath of the delay spectrum with respect to the first signal. Therefore, the second signal can be synchronized in the cooperative scheduling, so that the time when the first signal arrives at the UE in the prior art is not synchronized with the time when the second signal arrives at the UE, so that the multi-cell is not strictly synchronized. Launch performance.
  • the embodiment of the present invention provides a network device 1000, which is used in a wireless communication system, where a primary serving cell and a coordinated cell of a user terminal UE cooperate to provide a communication service for the UE, and the network device 1000 in this embodiment can use
  • the corresponding operation in the foregoing method embodiment is performed.
  • the network device 1000 includes a processor 1001 and a memory 1002.
  • the memory 1002 is in communication with the processor 1001, and the program is stored in the memory 1002.
  • a code, and the processor 1001 is configured to invoke the program code stored in the memory 1002, and perform the following operations:
  • the first signal is a physical downlink shared channel PDSCH signal that is sent by the coordinated cell to the UE
  • the second signal is sent by the primary serving cell Physical downlink control for the UE Channel PDCCH signal.
  • the acquiring the phase compensation of the first signal relative to the second signal may include:
  • the acquiring the uplink timing offset of the coordinated cell with respect to the primary serving cell may include:
  • the obtaining, according to the real-time measurement result, the uplink timing deviation when the uplink signal transmitted by the UE is transmitted on the coordinated cell with respect to the uplink transmission on the primary serving cell may include:
  • first time point is a time when the uplink SRS arrives at the coordinated cell
  • second time Point is the time when the uplink SRS arrives at the primary serving cell
  • the determining, according to the uplink timing offset, the phase compensation amount of the first signal relative to the second signal may include:
  • controlling, by the coordinated cell, the first signal after the phase pre-compensation according to the phase compensation amount includes:
  • controlling, by the coordinated cell, the first signal after performing phase pre-compensation according to the phase compensation amount includes:
  • Transmitting the phase compensation amount to the coordinated cell and acquiring, by the coordinated cell, a first signal after phase precompensation according to the phase compensation amount, and transmitting the phase precompensated first signal.
  • the method for performing the cooperative scheduling by the network device 1 may refer to the description of the first embodiment or the second embodiment, and details are not described herein again.
  • the network device provided by the embodiment of the present invention, because the processor can call and execute the program code stored in the memory, so that the first signal after the phase pre-compensation according to the phase compensation amount is transmitted by the coordinated cell Performing the same degree of offset as the phase compensation amount on the multipath of the time delay spectrum with respect to the first signal, and synchronizing with the second signal during cooperative scheduling, thereby preventing the first signal from reaching the UE in the prior art.
  • the moment is not synchronized with the moment when the second signal arrives at the UE, thereby improving the transmission performance in the case where the multi-cell is not strictly synchronized.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiment of the present embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention may be embodied in the form of a software product in the form of a software product, or a part of the technical solution, which is stored in a storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. Medium.

Abstract

L'invention concerne un procédé de planification collaborative et un dispositif réseau, qui peuvent améliorer les performances de transmission au cas où de multiples cellules ne sont pas strictement synchronisées. Le procédé est utilisé pour un système de communications sans fil. Une cellule de service principale et une cellule collaborative d'un équipement utilisateur (UE) dans le système collaborent l'une avec l'autre afin de fournir un service de communications à l'UE. Le procédé comprend les étapes suivantes : un dispositif réseau obtient une quantité de compensation de phase d'un premier signal relatif à un second signal, le premier signal étant un signal de canal physique partagé en liaison descendante (PDSCH) transmis par la cellule collaborative à l'UE et le second signal étant un signal de canal physique de commande en liaison descendante (PDCCH) transmis par la cellule de service principale à l'UE ; ensuite, le dispositif réseau commande la cellule collaborative afin qu'elle transmette le premier signal obtenu une fois que la pré-compensation de phase est réalisée en fonction de la quantité de compensation de phase, afin de permettre au premier signal et au second signal obtenus après la réalisation de pré-compensation de phase d'être synchrones. La présente invention peut s'appliquer au domaine des communications.
PCT/CN2013/088348 2013-12-02 2013-12-02 Procédé de planification collaborative et dispositif réseau WO2015081474A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201380002987.4A CN103875292B (zh) 2013-12-02 2013-12-02 一种协作调度方法和网络设备
PCT/CN2013/088348 WO2015081474A1 (fr) 2013-12-02 2013-12-02 Procédé de planification collaborative et dispositif réseau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/088348 WO2015081474A1 (fr) 2013-12-02 2013-12-02 Procédé de planification collaborative et dispositif réseau

Publications (1)

Publication Number Publication Date
WO2015081474A1 true WO2015081474A1 (fr) 2015-06-11

Family

ID=50912435

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/088348 WO2015081474A1 (fr) 2013-12-02 2013-12-02 Procédé de planification collaborative et dispositif réseau

Country Status (2)

Country Link
CN (1) CN103875292B (fr)
WO (1) WO2015081474A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109089269A (zh) 2017-06-14 2018-12-25 华为技术有限公司 通信方法、终端和网络设备
CN109219130B (zh) * 2017-06-30 2020-01-21 华为技术有限公司 一种同步方法及装置
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101917381A (zh) * 2010-08-20 2010-12-15 西安电子科技大学 协作多点传输系统中小区间延迟差补偿方法
CN102547968A (zh) * 2012-01-16 2012-07-04 电信科学技术研究院 一种协作多点传输下行同步方法及装置
WO2013136298A2 (fr) * 2012-03-14 2013-09-19 Nokia Siemens Networks Oy Procédé et appareil de production d'informations de retour de relation de phase inter-points d'émission pour le multi-points coordonné d'émission jointe

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102545985B (zh) * 2012-01-13 2014-05-07 电信科学技术研究院 协作多点传输中的干扰规避方法和装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101917381A (zh) * 2010-08-20 2010-12-15 西安电子科技大学 协作多点传输系统中小区间延迟差补偿方法
CN102547968A (zh) * 2012-01-16 2012-07-04 电信科学技术研究院 一种协作多点传输下行同步方法及装置
WO2013136298A2 (fr) * 2012-03-14 2013-09-19 Nokia Siemens Networks Oy Procédé et appareil de production d'informations de retour de relation de phase inter-points d'émission pour le multi-points coordonné d'émission jointe

Also Published As

Publication number Publication date
CN103875292B (zh) 2018-03-09
CN103875292A (zh) 2014-06-18

Similar Documents

Publication Publication Date Title
US11637721B2 (en) Methods and arrangements for channel estimation
US9106276B2 (en) Method and apparatus for reference signal transmission and reception
TWI723027B (zh) 無線網路中用於設備到設備定位的同步
CN111406421A (zh) 切换执行中的多波束随机接入过程
KR102052169B1 (ko) 동적 TDD UL/DL 구성 가능 셀들 및/또는 CoMP 셀들로의 핸드오버
JP6197244B2 (ja) 同一チャネルセル干渉を処理するための方法、装置、及びシステム
JP6283110B2 (ja) セル同期および同期セルインジケーション
CN115226110A (zh) 用于无执照频谱的物联网设计
WO2014142505A1 (fr) Procédé de réception d'informations de synchronisation pour communication directe entre équipements utilisateurs, et appareil correspondant
WO2011047077A2 (fr) Compte-rendu d'informations de temporisation pour assistance à une transmission de données en liaison descendante
TW201342839A (zh) 長期進化分時雙工(lte tdd)的連接模式間隙量測
CN107431598B (zh) 负荷获知信道状态参考信号传输
JP2019533924A (ja) Ｎｕｍｅｒｏｌｏｇｙに基づく同期および非同期動作の間の適合化
KR20140135700A (ko) 무선 통신 시스템에서 이웃 셀에 대한 측정 수행 방법 및 장치
AU2017219686B2 (en) NB-loT receiver operating at minimum sampling rate
CN103220249A (zh) 一种信息的传输、配置方法及装置
CN103220119A (zh) 一种检测载波同步的方法及装置
CN102077485A (zh) 信道预编码方法、装置及系统
WO2015081474A1 (fr) Procédé de planification collaborative et dispositif réseau
WO2013135185A1 (fr) Procédé de communication, équipement d'utilisateur et dispositif côté réseau
WO2013181944A1 (fr) Procédé et dispositif de synchronisation de fréquence
CN107113275A (zh) 一种数据传输方法、装置和系统
EP3834354A1 (fr) Accès multiple dans un système de communication sans fil
WO2014082503A1 (fr) Procédé et dispositif de suivi de synchronisation de liaison descendante durant une commutation td-scdma
CN117676794A (zh) 估计上行定时提前量的方法、网络设备、装置及存储介质

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: 13898806

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: 13898806

Country of ref document: EP

Kind code of ref document: A1