WO2015124103A1 - 一种用户调度方法及装置 - Google Patents

一种用户调度方法及装置 Download PDF

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Publication number
WO2015124103A1
WO2015124103A1 PCT/CN2015/073127 CN2015073127W WO2015124103A1 WO 2015124103 A1 WO2015124103 A1 WO 2015124103A1 CN 2015073127 W CN2015073127 W CN 2015073127W WO 2015124103 A1 WO2015124103 A1 WO 2015124103A1
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WIPO (PCT)
Prior art keywords
user equipment
port
reference signal
network device
traffic channel
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PCT/CN2015/073127
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English (en)
French (fr)
Inventor
李远军
汪玲
苏进喜
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • 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
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a user scheduling method and apparatus.
  • the time-frequency domain locations of the reference signals of port 7 (port 7) and port 8 (port 8) in the LTE (Long Term Evolution) system are shown in Figure 1, where the time-frequency location of port 7/8/11/13
  • the time-frequency position of port9/10/12/14 is different.
  • the orthogonal sequence (walsh matrix) between the four pilot sequences of port7/8/11/13 realizes the orthogonalization of the time-frequency sequence.
  • Frequency resource multiplexing, port9/10/12/14 also uses the same multiplexing method.
  • MU-MIMO Multi-User Multiple Input Multiple Output
  • TTI Transmission Time Interval
  • a plurality of UEs User Equipments
  • the MU-MIMO scheme is supported in both TM8 mode (Transmission Mode 8, Transmission Mode 8) and Release 10 (Transmission Mode 9) in Release 10 of LTE Release 9.
  • TM8 mode Transmission Mode 8, Transmission Mode 8
  • Release 10 Transmission Mode 9
  • the NDI (New Data Indicator) is a field of DCI (Downlink Control Information) sent by the base station to the UE.
  • DCI Downlink Control Information
  • SCID scrambling identity
  • the NDI field of UE-1 is taken as 0.
  • the MU-MIMO scheme shown in Figure 2a can be implemented by taking the NDI field of UE-2 to 1.
  • the NDI field of UE-1 is taken as 0, and the NDI field of UE-2 is also taken as 0, but the SCID field of UE-1 is taken as 0, for the UE.
  • the SCID field of -2 takes 1 to implement the MU-MIMO scheme shown in Figure 2b.
  • UE-1 uses port7 and port8 (the corresponding SCID takes 0), and UE-2 also uses port7 and port8 (the corresponding SCID takes 1).
  • the MU-MIMO scheme shown in Figure 3 can be implemented.
  • Table 2 Antenna port mapping relationship of one transport block and two transport blocks for one UE in TM9 mode
  • SCID in Table 2 represents the scrambling ID (SCID) in TM9 mode, and similarly the MU-MIMO scheme shown in Figures 2a, 2b and 3 can also be implemented:
  • the DCI schedule received by the UE only indicates one transport block, and the value of the NDI field according to Table 1 or the value of Table 2 is only 1 antenna port (port 7 or port 8).
  • UE-1 may adopt the following multiple interference suppression schemes:
  • UE-1 considers that the base station does not schedule MU-MIMO (that is, only UE-1 is scheduled), so that channel estimation is performed only on the reference signal sequence corresponding to port7, and subsequent detection is performed; In this case, if the base station actually schedules the UE-2 using the same channel resource, since the signal of the UE-2 is not suppressed as the interference of the UE-1, it is obvious that the reception performance of the UE-1 is significantly deteriorated;
  • the performance requirements of the UE are obviously improved, and the method of simplifying processing or compromise processing is not conducive to interference suppression and performance improvement.
  • the actual test shows that the MU-MIMO receiving processing performance of different UEs is very different due to the different processing schemes mentioned above.
  • the UE does not have a comprehensive grasp of the base station scheduling information, and the base station cannot grasp the actual processing of the UE when performing MU-MIMO pairing scheduling. Capability, the result can only rely on the UE to make compromises according to its own processing capabilities, and the interference suppression is insufficient, resulting in poor overall performance of MU-MIMO.
  • both users use port7 and port8, but the scrambling ID (SCID) is different.
  • SCID scrambling ID
  • the reference signal positions of a total of four antenna ports of two UEs correspond to the reference signal positions of port 7 and port 8. Since port 7 and port 8 occupy the same set of time-frequency positions, the orthogonality between reference sequences is orthogonal sequence and plus The scrambling ID ensures that different scrambling IDs correspond to different m sequences.
  • the actual test m sequence is a pseudo-random sequence. Compared with the Walsh (Walsh) code scheme and the frequency domain orthogonal scheme, the orthogonality is obviously poor. Due to the lack of orthogonality between the reference signals, the channel estimation is inaccurate. For the MU-MIMO of two users, the scheme of the port 7 and port 8 is scheduled to be poor for each user.
  • the inconsistent interference suppression capability may result in poor performance of multi-user pairing transmission on the user equipment side.
  • the embodiment of the present invention provides a user scheduling method and device, which are used to solve the problem that the user equipment side receiving processing performance difference is large due to the MU-MIMO scheduling, and the interference suppression capability is inconsistent, which may result in poor user-paired transmission performance of the user equipment side.
  • the network device determines a user equipment pair that performs MU-MIMO scheduling, where the user equipment pair includes the first user equipment And a second user equipment;
  • the network device respectively instructs two user equipments in the user equipment pair to perform port detection
  • the network device sends, according to the at least one user equipment, the corresponding reference signal and the service channel, on the part of the port that is instructed to be detected, so that the network device sends the reference signal to the first user equipment and
  • the port used by the traffic channel is different from the port used to transmit the reference signal and the traffic channel to the second user equipment.
  • a determining unit configured to determine a user equipment pair that performs MU-MIMO scheduling, where the user equipment pair includes a first user equipment and a second user equipment;
  • a port detection indicating unit configured to respectively perform port detection by two user equipments in the user equipment pair by using a MAC protocol processing module
  • a scheduling unit configured to instruct the baseband processing module to send a corresponding reference signal and a traffic channel to the at least one user equipment of the user equipment pair, so that the network equipment is sent to the first user
  • the port used by the device to transmit the reference signal and the traffic channel is different from the port used to transmit the reference signal and the traffic channel to the second user equipment.
  • the network device includes: a MAC protocol processing module, a baseband processing module, and a scheduler;
  • the scheduler is configured to determine a user equipment pair that performs MU-MIMO scheduling, where the user equipment pair includes a first user equipment and a second user equipment; and the MAC protocol processing module respectively indicates that the user equipment is centered The two user equipments perform port detection; and instruct the baseband processing module to send a corresponding reference signal and a traffic channel only on the part of the user equipment indicated for the at least one user equipment of the user equipment pair, so that The port used by the network device to send the reference signal and the traffic channel to the first user equipment is different from the port used to send the reference signal and the traffic channel to the second user equipment.
  • the base station provided by the embodiment of the present invention includes: a processor, a memory, a transceiver, and a bus interface, wherein the processor, the memory, and the transceiver are connected by using a bus interface;
  • the processor is configured to read a program in the memory, and perform the following method: determining a user equipment pair that performs multi-user-multiple input multiple output MU-MIMO scheduling, where the user equipment pair includes a first user equipment and a second user equipment; respectively indicating port detection of two user equipments in the user equipment pair; and, for at least one user equipment of the user equipment pair, only the part of the port detected by the transceiver Transmitting a corresponding reference signal and a traffic channel, so that the port used by the network device to send the reference signal and the traffic channel to the first user equipment is different from the use of sending the reference signal and the traffic channel to the second user equipment Port
  • the memory is configured to store one or more executable programs, and may store data used by the processor when performing operations;
  • the transceiver is configured to send a reference signal and a traffic channel to the user equipment under the control of the processor;
  • the bus interface provides an interface, and the processor is responsible for managing the bus architecture and the usual processing.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by the processor and various circuits of memory represented by the memory.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the network device is configured to perform the MU-MIMO scheduling user equipment pair, instruct the user equipment to perform port detection, and send the corresponding reference signal and the traffic channel on the indicated port,
  • the at least one user equipment transmits the corresponding reference signal and the traffic channel only on the part of the port that is instructed to be detected, and the network device sends the reference signal and the traffic channel to the first user equipment in the user equipment pair.
  • the port used is different from the port used for transmitting the reference signal and the traffic channel to the second user equipment, and on the other hand forcing the first user equipment or the second user equipment to perform port detection according to the indicated port, so that during MU-MIMO scheduling When the difference in reception processing performance on the user equipment side is large, interference can be reduced, and multi-user paired transmission performance can be improved.
  • FIG. 1 is a schematic diagram of a reference signal position of port 7/8/9/10/11/12/13/14 in the prior art
  • FIGS. 2a and 2b are schematic diagrams of a MU-MIMO scheme for two-user and per-user single-port scheduling in the prior art
  • 3 is a schematic diagram of a MU-MIMO scheme for two-user and two-port per-user scheduling in the prior art
  • FIG. 4 is a schematic structural diagram of a network device and a user equipment according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an overall process of user scheduling according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of a user scheduling process 600 according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a user scheduling process 700 according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a user scheduling process 800 according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a scheduler according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the embodiment of the present invention provides a MU-MIMO scheduling scheme in an LTE system, which can improve channel estimation accuracy and detection performance of the UE in transmission mode 8 (TM8) and transmission mode 9 (TM9), thereby improving system capacity.
  • TM8 transmission mode 8
  • TM9 transmission mode 9
  • the device involved in the embodiment of the present invention includes a network device and a user device, and the network device may be a base station or a network device having similar functions.
  • FIG. 4 shows the structure of the network device 100 and the user device 200.
  • the network device (base station) 400 can include a scheduler 110, a MAC (Media Access Control) protocol processing module 120, a baseband processing module 130, and a radio frequency module 140.
  • the functions related to the embodiments of the present invention are described as follows:
  • the scheduler 110 is responsible for performing MU-MIMO UE pairing, determining scheduling result parameters, including PRB (Physical Resource Block) resource location, MCS (Modulation and Coding Scheme) level, and the like, and indicating baseband processing.
  • the module 130 performs coding, reference signal to time-frequency mapping, and PDSCH (Physical downlink shared channel) to time-frequency mapping.
  • the MAC protocol processing module 120 is responsible for processing the HARQ (Hybrid Automatic Repeat Request) process, that is, processing the ACK/NACK (ACKnowledgement/Non-ACKnowledgement) fed back by the UE, and the NACK fed back by the UE usually needs to be retransmitted. Corresponding to the transport block to correct the transport block that failed to transmit.
  • the baseband processing module 130 is responsible for encoding, mapping of reference signals to time-frequency resources, mapping of PDSCH to time-frequency, and the like.
  • the radio frequency module 140 is responsible for radiating the time domain baseband signal to the air at a specified power for reception by the UE.
  • the user equipment 200 can include a MAC protocol processing module 210, a baseband processing module 220, and a radio frequency module 230.
  • MAC protocol processing module 210 a MAC protocol processing module 210
  • baseband processing module 220 a baseband processing module 220
  • radio frequency module 230 a radio frequency module 230.
  • the radio frequency module 230 is responsible for receiving the radio frequency signal transmitted by the network device (base station) 100 and converting it into a baseband signal for processing by the baseband processing module 220.
  • the baseband processing module 220 performs channel estimation based on the received reference signal and performs demodulation and decoding processing on the PDSCH.
  • the MAC protocol processing module 210 is responsible for the HARQ process, that is, feeding back ACK/NACK to the network device (base station) 100 according to the decoding result of the PDSCH by the baseband processing module 220.
  • FIG. 5 is a schematic diagram of an overall process 500 of user scheduling according to an embodiment of the present invention.
  • the structure of the network device involved may be, for example, a network device (base station) 100, and the structure of the UE may be, for example, the user equipment 200.
  • the scheduling process can include the following steps 510-530:
  • Step 510 The network device determines a UE pair that performs MU-MIMO scheduling, where the UE pair includes a first user equipment (represented as UE-1) and a second user equipment (represented as UE-2).
  • the network device can perform MU-MIMO UE pairing according to spatial isolation.
  • the network device (base station) 100 is used as an example.
  • the scheduler 110 can obtain spatial channel information of the UE-1 and the UE-2 by measuring a SRS (Sounding Reference Signal) channel, thereby calculating spatial isolation information.
  • UE-1 and UE-2 can be paired for MU-MIMO scheduling beyond the isolation threshold (for example, the incoming wave angle > 30 degrees).
  • Step 520 The network device respectively instructs the two UEs in the UE pair to perform port detection.
  • Step 530 For at least one UE of the UE pair, send a corresponding reference signal and a traffic channel only on the part of the port that is indicated to be detected, so that the network device sends the reference signal and the used channel to the UE-1.
  • the port is different from the port used to transmit the reference signal and the traffic channel to UE-2.
  • the network device determines that the UE-1 or the UE-2 detects the The first port, but not transmitting the transport block on the first port, rejects the transport block retransmission for the NACK.
  • the network device is configured to perform the MU-MIMO scheduling user equipment pair, instruct the user equipment to perform port detection, and send the corresponding reference signal and the traffic channel on the indicated port,
  • the at least one user equipment transmits the corresponding reference signal and the traffic channel only on the part of the port that is instructed to be detected, and the network device sends the reference signal and the traffic channel to the first user equipment in the user equipment pair.
  • the port used is different from the port used for transmitting the reference signal and the traffic channel to the second user equipment, and on the other hand forcing the first user equipment or the second user equipment to perform port detection according to the indicated port, so that during MU-MIMO scheduling When the difference in reception processing performance on the user equipment side is large, interference can be reduced, and multi-user paired transmission performance can be improved.
  • the network device can obtain the UE protocol version information reported by the UE before scheduling the UE.
  • the network device can obtain the protocol version information reported by the UE according to the UE capability transfer process defined in the 3GPP (3rd Generation Partnership Project) 36331.
  • the protocol version information of the two UEs performing MU-MIMO pairing has the following combinations:
  • Combination case 1 UE-1 and UE-2 are both Release 9 versions;
  • Combination case 2 UE-1 and UE-2 are both Release 10 or higher;
  • Combination case 3 UE1 is Release 9 version and UE-2 is Release 10 or higher.
  • the embodiment of the present invention provides the following scheduling modes:
  • the network device performs the scheduling mode decision according to the user equipment protocol version information reported by the user equipment, so as to ensure that two user equipments that perform MU-MIMO scheduling pairing use different ports to receive the network device to send.
  • the reference signal and the traffic channel can reduce interference and improve multi-user paired transmission performance when the user equipment side reception processing performance difference is large during MU-MIMO scheduling.
  • the network device instructs UE-1 and UE-2 to detect port7 and port8 through the control channel.
  • the scheduler 110 instructs the PDCCH (Physical Downlink Control Channel) sent by the MAC protocol processing module 120 to the UE-1 (using the DCI format 2B), including There are 2 transport blocks (corresponding to port7 and port8), and the scheduler 110 instructs the PDCCH (using DCI format 2B) sent by the MAC protocol processing module 120 to the UE-2, including 2 transport blocks (corresponding to port7 and port8).
  • PDCCH Physical Downlink Control Channel
  • the scheduler 110 instructs the PDCCH (using DCI format 2B) sent by the MAC protocol processing module 120 to the UE-2, including 2 transport blocks (corresponding to port7 and port8).
  • the network device does not send a corresponding reference signal and a traffic channel on port8, and for UE-2, the network device does not send a corresponding reference signal and a traffic channel on port7.
  • the scheduler 110 indicates to the baseband processing module 130 that the reference signal corresponding to the port 8 and the PDSCH corresponding to the port 8 are not transmitted to the UE-1; the scheduler 110 indicates to the baseband processing module 130.
  • the reference signal corresponding to port 7 and the PDSCH corresponding to port 7 are not transmitted to UE-2.
  • UE-1 and UE-2 perform HARQ feedback, respectively.
  • the baseband processing module 220 of UE-1 will perform channel estimation on both port7 and port8, but since the network device does not actually UE -1 sends the reference signal corresponding to port8 and the PDSCH. Therefore, UE-1 must respond to the NACK of the transport block carried by port8 and perform normal feedback on the transport block carried by port7.
  • the PDCCH indicates 2 transmissions.
  • the baseband processing module 220 of UE-2 will perform channel estimation on both port7 and port8, but since the network device does not actually send the reference signal and PDSCH corresponding to port7 to UE-2, UE- 2 It is necessary to respond to the NACK of the transport block carried by port7 and perform normal feedback on the transport block carried by port8.
  • the network device processes the ACK/NACK fed back by UE-1 and UE-2, respectively.
  • the network device receives the NACK of the transport block on the port 8 of the UE8, the network device refuses to perform the transport block retransmission; when the user equipment receives the NACK of the transport block of the UE-2 for the port 7, the network device refuses to perform the transport block weight. pass.
  • the MAC protocol processing module 120 processes the NACK information of the UE-1: the NACK of the transport block corresponding to the port 8 of the UE-1 is not heavy.
  • the MAC protocol processing module 120 processes the NACK information of UE-2: port 7 to UE-2
  • the NACK of the corresponding transport block is not retransmitted, and the transport block corresponding to the port 8 of the UE-2 transmits the retransmitted transport block on the initially transmitted port.
  • the UE can be forced to perform channel estimation and interference suppression on two ports (ie, The signals transmitted by UE-1 and UE-2 are also estimated and suppressed, which solves the problem that the UE side receiving processing performance difference is large when MU-MIMO scheduling is performed, and the multi-user pairing transmission performance problem caused by the inconsistent interference capability is suppressed, thereby Can achieve better performance than the prior art.
  • the network device instructs UE-1 and UE-2 to detect ports 7-10 through the control channel.
  • the scheduler 110 instructs the PDCCH (using DCI format 2C) that the MAC protocol processing module 120 sends to the UE-1, including two transport blocks, and the DCI format 2C.
  • the field value corresponding to "two codewords" in Table 2 is set to 3, that is, "4 layers, port 7 to 10"; the scheduler 110 instructs the PDCCH (using DCI format 2C) that the MAC protocol processing module 120 transmits to the UE-2, where Two transport blocks are included, and the field value of "two codewords" corresponding to Table 2 in DCI format 2C is set to 3, that is, "4 layers, port 7-10".
  • the network device does not send the corresponding reference signal and traffic channel on port9 and port10.
  • the network device does not send the corresponding reference signal and traffic channel on port7 and port8.
  • the scheduler 110 indicates to the baseband processing module 130 that the reference signal corresponding to the port 9 and the port 10 and the PDSCH corresponding to the port 9 and the port 10 are not transmitted to the UE-1; the scheduler 110 is directed to the baseband.
  • the processing module 130 indicates that the reference signal corresponding to the port 7 and the port 8 and the PDSCH corresponding to the port 7 and the port 8 are not transmitted to the UE-2.
  • UE-1 and UE-2 perform HARQ feedback, respectively.
  • the baseband processing module 220 of UE-1 will perform channel estimation on ports 7-10, but the network device does not actually UE-1.
  • the UE-1 must respond to the NACK of the transport block carried by the port 9 and the port 10 of the UE-1, and perform normal feedback on the transport block carried by the port 7 and the port 8 of the UE-1; similarly, For UE-2, since the PDCCH indicates 2 transport blocks and 4 layers, the baseband processing module 220 of UE-2 will perform channel estimation on both ports 7-10, but since the network device does not actually send port7 to UE-2.
  • the UE-1 must respond to the NACK of the transport block carried by the port 7 and the port 8 of the UE-2, and perform normal feedback on the transport block carried by the port 9 and the port 10 of the UE-2.
  • the network device processes the ACK/NACK fed back by UE-1 and UE-2, respectively.
  • the network device receives the NACK of the transport block of the UE-1 for the port 9 or the port 10
  • the network device refuses to perform the transport block retransmission
  • the device receives the NACK of the UE-2 for the transport block on port7 or port8, the device refuses to perform the transport block retransmission.
  • the network device base station 100 shown in FIG.
  • the MAC protocol processing module 120 processes the NACK information of the UE-1: the NACK of the transport block corresponding to the port 9 and the port 10 of the UE-1 is not Performing retransmission, transmitting the retransmitted transport block on the initially transmitted port to the transport block corresponding to port-1 and port8 of UE-1; for UE-2, the MAC protocol processing module 120 processes the NACK information of UE-2: for the UE The NACK of the transport block corresponding to port 7 and port 8 of -2 is not retransmitted, and the transport block corresponding to port 9 and port 10 of UE-2 transmits the retransmitted transport block on the initial transmitted port.
  • the orthogonality is poor, and it is difficult to perform effective interference suppression when receiving on the UE side, and thus the performance is poor.
  • the PDCCH indicates that the UE-1 and the UE-2 detect the ports 7 to 10, but the network side controls that only the port 7 and the port 8 are actually sent to the UE-1.
  • the reference signal and the PDSCH for the UE-2, actually only transmit the reference signals of the port 9 and the port 10 and the PDSCH, so that the actual effective reference signals of the UE-1 are located at the ports 7 and port 8, and the actual effective reference signals of the UE-2 are located at the port 9 And port10, since port 7-8 and port 9-10 are different in frequency, so that there is very good orthogonality, so that the UE side can achieve more accurate channel estimation and perform effective interference suppression, that is, compared Better performance of the prior art.
  • the network device instructs UE-1 to detect port7 and/or port8 through the control channel, instructing UE-2 to detect ports 7-10.
  • the scheduler 110 instructs the PDCCH (using the DCI format 2B) that the MAC protocol processing module 120 sends to the UE-1, and may specifically include one or two according to the actual channel state.
  • the scheduler 110 instructs the PDCCH (using DCI format 2C) sent by the MAC protocol processing module 120 to the UE-2, including 2 transport blocks, and the corresponding table 2 in the DCI format 2C
  • the field value of "two codewords" is set to 3, which is "4 layers, port7 ⁇ 10".
  • the network device transmits a corresponding reference signal and a traffic channel on the port indicating the detection, and for UE-2, the network device does not transmit the corresponding reference signal and the traffic channel on port7 and port8.
  • the scheduler 110 instructs the baseband processing module 130 to transmit a reference signal and a PDSCH corresponding to one or two transport blocks of the PDCCH of the UE-1; the scheduler 110 processes the baseband
  • the module 130 indicates that the reference signal corresponding to port7 and port8 and the PDSCH corresponding to port7 and port8 are not transmitted to UE-2.
  • UE-1 and UE-2 perform HARQ feedback, respectively.
  • the baseband processing module 220 of UE-1 will perform channel estimation on the indicated detected port and respond to the transport block carried by the corresponding port.
  • ACK/NACK since the PDCCH indicates 2 transport blocks and 4 layers, the baseband processing module 220 of UE-2 will perform channel estimation on ports 7-10, but since the network device does not actually UE -2 sends the reference signal and PDSCH corresponding to port7 and port8. Therefore, UE-1 must respond to the NACK of the transport block carried by port7 and port8 of UE-2, and perform normal feedback on the transport block carried by port9 and port10 of UE-2.
  • the network device processes the ACK/NACK fed back by UE-1 and UE-2, respectively.
  • the network device receives the ACK/NACK of the transport block of the UE-1 for the port 7 or the port 8
  • the network device performs the processing according to the protocol specified manner; when the network device receives the NACK of the transport block of the UE-2 for the port 7 or port 8 , refused to transfer block retransmission.
  • the network device base station 100 shown in FIG.
  • the MAC protocol processing module 120 processes the NACK information of the UE-1: retransmitting the transport block that the UE-1 feeds back as NACK;
  • the UE-2 the MAC protocol processing module 120 processes the NACK information of the UE-2: the NACK of the transport block corresponding to the port 7 and the port 8 of the UE-2 is not retransmitted, and the transport block corresponding to the port 9 and port 10 of the UE-2 is The retransmitted transport block is transmitted on the initial port.
  • the PDCCH indicates that the UE-1 detects the port 7 and/or the port 8, and instructs the UE-2 to detect the ports 7 to 10, but controls the UE on the network side.
  • 2 Actually only transmit the reference signals of port9 and port10 and PDSCH, so that the actual effective reference signals of UE-1 are located at port7 and/or port8, and the actual effective reference signals of UE-2 are located in port9 and port10, due to port7 ⁇ 8 and port 9 to 10 are different in frequency, so that there is very good orthogonality, so that the UE side can achieve more accurate channel estimation and perform effective interference suppression, that is, obtain better than the prior art. performance.
  • the embodiment of the present invention further provides a scheduler, which can be applied to the network device in the foregoing embodiment.
  • FIG. 9 is a schematic structural diagram of a scheduler according to an embodiment of the present invention.
  • the scheduler 300 can include a determining unit 310, a port detection indicating unit 320, and a scheduling unit 330, where:
  • a determining unit 310 configured to determine a user equipment pair that performs MU-MIMO scheduling, where the user equipment pair includes a first user equipment and a second user equipment;
  • the port detection instructing unit 320 is configured to perform port detection on the two user equipments in the user equipment pair by using a MAC protocol processing module.
  • the scheduling unit 330 is configured to instruct the baseband processing module to send, according to the at least one user equipment of the user equipment pair, a corresponding reference signal and a traffic channel on the part of the indicated detected port, so that the network device is first
  • the port used by the user equipment to transmit the reference signal and the traffic channel is different from the port used to transmit the reference signal and the traffic channel to the second user equipment.
  • the port detection indication unit 320 is specifically configured to: if the protocol versions of the first user equipment and the second user equipment are not lower than 3GPP Release 9, instruct the MAC protocol processing module to indicate the first user by using a control channel
  • the device and the second user equipment both detect the port 7 and the port 8;
  • the scheduling unit 330 is specifically configured to: indicate that the baseband processing module does not send the corresponding reference signal and the service channel on the port 8 for the first user equipment, And for the second user equipment, the corresponding reference signal and the traffic channel are not sent on the port 7.
  • the port detection indication unit 320 is specifically configured to: if the protocol versions of the first user equipment and the second user equipment are not lower than 3GPP Release 10, instruct the MAC protocol processing module to indicate the first user by using a control channel
  • the device and the second user equipment both detect the port 7 to the port 10;
  • the scheduling unit 330 is specifically configured to: indicate that the baseband processing module does not send the corresponding reference signal to the first user equipment on the port 9 and the port 10 A traffic channel, and for the second user equipment not transmitting corresponding reference signals and traffic channels on port 7 and port 8.
  • the port detection indication unit is specifically configured to: if the protocol version of the first user equipment is not lower than 3GPP Release 9, and the protocol version of the second user equipment is not lower than 3GPP Release 10, indicating that the MAC protocol processing module passes the control
  • the channel indicates that the first user equipment detects the port 7 and/or the port 8, and instructs the second user equipment to detect the port 7 to the port 10;
  • the scheduling unit 330 is specifically configured to: indicate the baseband processing module for the A user equipment transmits a corresponding reference signal and a traffic channel on the port indicating the detection, and the corresponding reference signal and the traffic channel are not transmitted on the port 7 and the port 8 for the second user equipment.
  • the scheduling unit 330 is further configured to: when receiving the NACK returned by the first user equipment or the second user equipment for the transport block transmitted on the indicated first port, if it is determined that the first user is indicated.
  • the device or the second user equipment detects the first port but does not send a transport block on the first port, and instructs the MAC protocol processing module to reject the transport block retransmission for the NACK.
  • the embodiment of the present invention further provides a base station.
  • the base station mainly includes: a processor 410, a memory 420, a transceiver 430, and a bus interface 440, wherein the processor, the memory, and the transceiver Connected via a bus interface;
  • the processor 410 is configured to read a program in the memory 420, and perform the following method: determining a user equipment pair that performs multi-user-multiple input multiple output MU-MIMO scheduling, where the user equipment pair includes the first user equipment and the second User equipment; respectively, performing port detection on two user equipments in the user equipment pair; and, for at least one user equipment in the user equipment pair, transmitting, by the transceiver 430, only on the part of the port that is instructed to be detected Reference signal and traffic channel such that the port used by the network device to transmit the reference signal and the traffic channel to the first user equipment is different from the port used to transmit the reference signal and the traffic channel to the second user equipment;
  • the memory 420 is configured to store one or more executable programs, and may store data used by the processor 410 when performing operations;
  • the transceiver 430 is configured to send a reference signal and a traffic channel to the user equipment under the control of the processor 410.
  • Bus interface 440 provides an interface for the processor to manage the bus architecture and normal processing.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 410 and various circuits of memory represented by memory 420.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the processor 410 is further configured to: if the protocol versions of the first user equipment and the second user equipment are not lower than 3GPP Release 9, indicating the first user equipment and the second user equipment Detecting port 7 and port 8; and, for the first user equipment, transmitting corresponding reference signals and traffic channels only on port 7 through transceiver 430, and for port 2 only for port 2 Send the corresponding reference signal and traffic channel.
  • the processor 410 is specifically configured to: if the protocol versions of the first user equipment and the second user equipment are not lower than 3GPP Release 10, instruct the first user equipment and the second user equipment to detect Port 7 to port 10; for the first user equipment not transmitting corresponding reference signals and traffic channels on port 9 and port 10, and for the second user equipment not transmitting corresponding reference signals on port 7 and port 8 Traffic channel.
  • the processor 410 is specifically configured to: if the protocol version of the first user equipment is not lower than 3GPP Release 9, the protocol version of the second user equipment is not lower than 3GPP Release 10, indicating the first user
  • the device detects port 7 and/or port 8, and instructs the second user equipment to detect port 7 to port 10; the transceiver 430 transmits a corresponding reference signal to the first user equipment on the port indicating the detection and A traffic channel, and for the second user equipment not transmitting corresponding reference signals and traffic channels on port 7 and port 8.
  • the processor 410 is further configured to: when receiving the negative acknowledgement NACK returned by the first user equipment or the second user equipment for the transport block transmitted on the indicated first port, if the base station is determined Although the first user equipment or the second user equipment is instructed to detect the first port, but the transport block is not sent on the first port, the transport block retransmission for the NACK is rejected.
  • 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 invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the present invention is directed to a flowchart of a method, apparatus (system), and computer program product according to an embodiment of the present invention. And / or block diagram to describe. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • the computer program instructions can be provided to a general purpose computer, a special purpose computer, an embedded processor, or a processor of other programmable data processing device such that instructions executed by a processor of the computer or other programmable data processing device can be implemented in a flowchart
  • 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 blocks of a flow or a flow and/or block diagram of the flowchart.

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Abstract

一种用户调度方法及装置。该方法包括：网络设备确定进行MU-MIMO调度的用户设备对，所述用户设备对中包含第一用户设备和第二用户设备；网络设备分别指示所述用户设备对中的两个用户设备进行端口检测；网络设备针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，以使所述网络设备向第一用户设备发送参考信号和业务信道所使用的端口不同于向第二用户设备发送参考信号和业务信道所使用的端口。本发明可解决由于MU-MIMO调度时用户设备侧接收处理性能差异大，抑制干扰能力不一致会导致用户设备侧多用户配对传输性能差的问题。

Description

一种用户调度方法及装置
本申请要求在2014年02月19日提交中国专利局、申请号为201410056905.0、发明名称为“一种用户调度方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信领域，尤其涉及一种用户调度方法及装置。
背景技术
LTE(Long Term Evolution，长期演进)系统中的port7(端口7)和port8(端口8)的参考信号的时频域位置如图1所示，其中，port7/8/11/13的时频位置和port9/10/12/14的时频位置是不同的，port7/8/11/13这四个导频序列间通过正交序列(沃尔什矩阵)实现时频序列的正交化和时频资源复用，port9/10/12/14也采用相同的复用方法。
MU-MIMO(Multi-User Multiple Input Multiple Output，多用户-多输入多输出)表示在1个调度时间单位(Transmission Time Interval，TTI)中，充分利用信道的空间独立性，使用相同的时频资源调度多个UE(User Equipment，用户设备)，来提高小区整体的频谱效率。LTE Release 9中的TM8模式(Transmission Mode 8，传输模式8)和Release 10中的TM9模式(传输模式9)均支持MU-MIMO方案。36212协议定义了相应的调度方案：
表1、TM8模式下对一个UE只传输一个传输块的天线端口映射关系
禁用传输块的NDI 天线端口
0 7
1 8
NDI(New data indicator，新数据指示)是基站发给UE的DCI(Downlink control information，下行控制信息)的一个字段。NDI取0时表示当前使用port7传输该传输块，NDI取1时表示当前使用port8传输该传输块。加扰ID(SCID，Scrambling identity)是基站发给UE的DCI中的另一字段，可取值0或1，对应了port7和port8天线端口的不同参考信号序列。
对于调度2个UE且每个UE一个空间层的MU-MIMO场景，UE-1的NDI字段取0， UE-2的NDI字段取1，即可实现图2a所示的MU-MIMO方案。
对于调度2个UE且每个UE一个空间层的MU-MIMO场景，UE-1的NDI字段取0，UE-2的NDI字段也取0，但对UE-1的SCID字段取0，对UE-2的SCID字段取1，即可实现图2b所示的MU-MIMO方案。
对于调度2个UE且每个UE两个空间层的MU-MIMO场景，UE-1使用port7和port8(对应的SCID取0)，UE-2也使用port7和port8(对应的SCID取1)，即可实现图3所示的MU-MIMO方案。
表2、TM9模式下对一个UE传输1个传输块、2个传输块的天线端口映射关系
Figure PCTCN2015073127-appb-000001
表2中的nSCID表示了TM9模式下的加扰ID(SCID)，类似的也可实现图2a、图2b和图3所示的MU-MIMO方案：
对于2用户MU-MIMO(每用户1个空间层)，在DCI中对UE-1配置对应表2左侧的Value＝0，对UE-2配置Value＝2；
对于2用户MU-MIMO(每用户1个空间层)，在DCI中对应UE-1配置对应表2左侧Value＝0，对UE-2配置Value＝1；
对于2用户MU-MIMO(每用户2个空间层)，在DCI中对UE-1配置对应表2右侧的Value＝0，对UE-2配置Value＝1。
在每用户只调度了单端口的情况，由于UE端收到的DCI调度仅指示了一个传输块，并根据表1的NDI字段或表2的Value值仅在1个天线端口(port7或port8)进行接收， 不失一般性，这里假定UE-1对应的DCI指示使用port7(SCID＝0)，为了抑制使用相同时频资源的UE-2的干扰，UE-1可能采用下面的多种抑制干扰方案：
(1)最简化处理，即UE-1认为基站并没有调度MU-MIMO(即只调度了UE-1)，从而只对port7对应的参考信号序列进行信道估计，并进行后续的检测；这种情况下，如果基站实际调度了使用相同信道资源的UE-2，由于UE-2的信号作为UE-1的干扰完全没有得到抑制，则显然UE-1的接收性能会明显恶化；
(2)最复杂处理，即UE-1认为基站调度了MU-MIMO，从而会对port7(SCID＝1)、port8(SCID＝0)、port8(SCID＝1)对应的参考信号进行信道估计和干扰抑制过程；
(3)折中处理，即UE-1根据自身的能力，折中进行部分参考信道(port7(SCID＝1)、port8(SCID＝0)和port8(SCID＝1)中的1个或多个)的信道估计和干扰抑制过程。
按照最复杂处理，会明显提升对UE的性能要求，而按照简化处理或折中处理的方式又不利于干扰抑制和性能提升。实际测试显示，由于存在上述的不同处理方案，不同UE的MU-MIMO接收处理性能差异很大，UE对基站调度信息量掌握不全面，同时基站进行MU-MIMO配对调度时无法掌握UE的实际处理能力，结果只能依靠UE根据自身的处理能力做折中处理，对干扰抑制不充分，导致了MU-MIMO整体性能较差。
在每用户调度了2端口的情况，2个用户均使用port7和port8，但加扰ID(SCID)不同。比如，2个UE的总共4个天线端口的参考信号位置就对应了port7和port8的参考信号位置，由于port7和port8占同一套时频位置，参考序列间的正交性由正交序列和加扰ID来保证，不同的加扰ID对应了不同的m序列。但实际测试m序列作为一种伪随机序列，相比Walsh(沃尔什)码方案、频域正交方案，正交性明显较差。由于参考信号间的正交性不足，信道估计的不准确，对于2个用户的MU-MIMO，每用户均调度了port7和port8二个端口的方案性能较差。
由此可见，由于MU-MIMO调度时用户设备侧接收处理性能差异大，抑制干扰能力不一致会导致用户设备侧多用户配对传输性能差。
发明内容
本发明实施例提供了一种用户调度方法及装置，用于解决由于MU-MIMO调度时用户设备侧接收处理性能差异大，抑制干扰能力不一致会导致用户设备侧多用户配对传输性能差的问题。
本发明实施例提供的用户调度方法，包括：
网络设备确定进行MU-MIMO调度的用户设备对，所述用户设备对中包含第一用户设 备和第二用户设备；
所述网络设备分别指示所述用户设备对中的两个用户设备进行端口检测；
所述网络设备针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，以使所述网络设备向第一用户设备发送参考信号和业务信道所使用的端口不同于向第二用户设备发送参考信号和业务信道所使用的端口。
本发明实施例提供的调度器，包括：
确定单元，用于确定进行MU-MIMO调度的用户设备对，所述用户设备对中包含第一用户设备和第二用户设备；
端口检测指示单元，用于通过MAC协议处理模块分别指示所述用户设备对中的两个用户设备进行端口检测；
调度单元，用于指示基带处理模块针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，以使所述网络设备向第一用户设备发送参考信号和业务信道所使用的端口不同于向第二用户设备发送参考信号和业务信道所使用的端口。
本发明实施例提供的网络设备，包括：MAC协议处理模块、基带处理模块、调度器；
所述调度器，用于确定进行MU-MIMO调度的用户设备对，所述用户设备对中包含第一用户设备和第二用户设备；通过所述MAC协议处理模块分别指示所述用户设备对中的两个用户设备进行端口检测；以及，指示所述基带处理模块针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，以使所述网络设备向第一用户设备发送参考信号和业务信道所使用的端口不同于向第二用户设备发送参考信号和业务信道所使用的端口。
本发明实施例提供的基站，包括：处理器、存储器、收发机、总线接口，其中处理器、存储器与收发机之间通过总线接口连接；
所述处理器，用于读取所述存储器中的程序，执行下列方法：确定进行多用户-多输入多输出MU-MIMO调度的用户设备对，所述用户设备对中包含第一用户设备和第二用户设备；分别指示所述用户设备对中的两个用户设备进行端口检测；以及，针对所述用户设备对中的至少一个用户设备，通过所述收发机仅在所指示检测的部分端口上发送对应的参考信号和业务信道，以使所述网络设备向所述第一用户设备发送参考信号和业务信道所使用的端口不同于向所述第二用户设备发送参考信号和业务信道所使用的端口；
所述存储器，用于存储一个或多个可执行程序，可以存储处理器在执行操作时所使用的数据；
所述收发机，用于在所述处理器的控制下向所述用户设备发送参考信号和业务信道；
所述总线接口提供接口，处理器负责管理总线架构和通常的处理。
总线构架可以包括任意数量的互联的总线和桥，具体由处理器代表的一个或多个处理器和存储器代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。
本发明的上述实施例中，由于网络设备针对进行MU-MIMO调度用户设备对，指示用户设备进行端口检测以及在所指示的端口上发送对应的参考信号和业务信道时，针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，一方面使得所述网络设备向该用户设备对中的第一用户设备发送参考信号和业务信道所使用的端口不同于向第二用户设备发送参考信号和业务信道所使用的端口，另一方面强制第一用户设备或第二用户设备根据所指示的端口进行端口检测，从而在MU-MIMO调度时用户设备侧接收处理性能差异大的情况下，能够减少干扰，进而提高多用户配对传输性能。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简要介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域的普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术中port7/8/9/10/11/12/13/14的参考信号位置示意图；
图2a和图2b为现有技术中两用户且每用户单端口调度的MU-MIMO方案示意图；
图3为现有技术中两用户且每用户两端口调度的MU-MIMO方案示意图；
图4为本发明实施例中的网络设备和用户设备的结构示意图；
图5为本发明实施例提供的用户调度的总体流程示意图；
图6为本发明实施例提供的用户调度流程600的示意图；
图7为本发明实施例提供的用户调度流程700的示意图；
图8为本发明实施例提供的用户调度流程800的示意图；
图9为本发明实施例提供的调度器的结构示意图；
图10为本发明实施例提供的基站的结构示意图。
具体实施方式
本发明实施例提出了一种LTE系统中的MU-MIMO调度方案，可提升UE在传输模式8(TM8)和传输模式9(TM9)下的信道估计精度和检测性能，从而提升系统容量。
为了使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作进一步地详细描述，显然，所描述的实施例仅仅是本发明一部份实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
本发明实施例涉及到的设备包括网络设备和用户设备，所述网络设备可以是基站或者具有类似功能的网络设备。图4示出了网络设备100和用户设备200的结构。如图所示，网络设备(基站)400可包括调度器110、MAC(Media Access Control，媒体接入控制)协议处理模块120、基带处理模块130和射频模块140。与本发明实施例相关的功能描述如下：
调度器110负责进行MU-MIMO UE配对，确定调度结果参数，包括PRB(Physical Resource Block，物理资源块)资源位置、MCS(Modulation and Coding Scheme，调制和编码方案)等级等信息，并指示基带处理模块130进行编码、参考信号到时频的映射、PDSCH(Physical downlink shared channel，物理下行链路共享信道)到时频的映射。MAC协议处理模块120负责处理HARQ(Hybrid Automatic Repeat Request)过程，即对UE反馈的ACK/NACK(ACKnowledgement/Non-ACKnowledgement，肯定确认/否定确认)进行处理，对于UE反馈的NACK通常需要进行重传对应传输块，以纠正传输失败的传输块。基带处理模块130负责编码、参考信号到时频资源的映射、PDSCH到时频的映射等。射频模块140负责将时域基带信号以指定功率辐射到空中，由UE进行接收。
用户设备200可包括MAC协议处理模块210、基带处理模块220和射频模块230。与本发明实施例相关的功能描述如下：
射频模块230负责接收网络设备(基站)100发射的射频信号，并转换为基带信号供基带处理模块220处理。基带处理模块220根据接收到的参考信号进行信道估计，并对PDSCH进行解调制和译码的处理。MAC协议处理模块210负责HARQ过程，即根据基带处理模块220对PDSCH的译码结果，向网络设备(基站)100反馈ACK/NACK。
参见图5，为本发明实施例提供的用户调度的总体流程500示意图。其中涉及到的网络设备的结构可如网络设备(基站)100，UE的结构可如用户设备200。该调度过程可包括以下步骤510～530：
步骤510：网络设备确定进行MU-MIMO调度的UE对，该UE对中包含第一用户设备(表示为UE-1)和第二用户设备(表示为UE-2)。
该步骤中，网络设备可根据空间隔离度进行MU-MIMO UE配对。比如，以网络设备(基站)100为例，调度器110可通过测量SRS(Sounding Reference Signal，探测参考信号)信道获得UE-1和UE-2的空间信道信息，从而计算出空间隔离度信息，超过隔离度门限(比如来波角度>30度)即可将UE-1和UE-2配对进行MU-MIMO调度。
步骤520：网络设备分别指示该UE对中的两个UE进行端口检测。
步骤530：针对该UE对中的至少一个UE，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，以使所述网络设备向UE-1发送参考信号和业务信道所使用的端口不同于向UE-2发送参考信号和业务信道所使用的端口。
进一步地，网络设备接收到UE-1或UE-2针对所指示检测的第一端口上传输的传输块返回的NACK时，若判断所述网络设备虽然指示UE-1或UE-2检测了所述第一端口，但并未在所述第一端口上发送传输块，则拒绝针对所述NACK进行传输块重传。
本发明的上述实施例中，由于网络设备针对进行MU-MIMO调度用户设备对，指示用户设备进行端口检测以及在所指示的端口上发送对应的参考信号和业务信道时，针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，一方面使得所述网络设备向该用户设备对中的第一用户设备发送参考信号和业务信道所使用的端口不同于向第二用户设备发送参考信号和业务信道所使用的端口，另一方面强制第一用户设备或第二用户设备根据所指示的端口进行端口检测，从而在MU-MIMO调度时用户设备侧接收处理性能差异大的情况下，能够减少干扰，进而提高多用户配对传输性能。
进一步地，网络设备在对UE进行调度之前，可获得UE上报的UE协议版本信息。比如，网络设备可按照3GPP(3rd Generation Partnership Project第三代合作伙伴计划)36331中定义的UE能力传递(UE capability transfer)的过程获得UE上报的协议版本信息。
进行MU-MIMO配对的两个UE的协议版本信息存在以下组合情况：
组合情况1：UE-1和UE-2均为Release 9版本；
组合情况2：UE-1和UE-2均为Release 10或更高版本；
组合情况3：UE1为Release 9版本且UE-2为Release 10或更高版本。
根据以上这几种组合情况，本发明实施例相应提供了以下调度方式：
针对组合情况1，采用图6所示的流程600；
针对组合情况2，采用图6所示的流程600或者采用图7所示的流程700或者采用图8所示的流程800；
针对组合情况3，采用图6所述的流程600或者采用图8所示的流程800。
通过以上流程可以看出，由于网络设备根据用户设备上报的用户设备协议版本信息进行调度方式的决策，以保证进行MU-MIMO调度配对的两个用户设备使用不同的端口接收所述网络设备发送的参考信号和业务信道，从而在MU-MIMO调度时用户设备侧接收处理性能差异大的情况下，能够减少干扰，进而提高多用户配对传输性能。
参见图6，若UE-1和UE-2的协议版本均不低于Release 9，则流程600被执行：
在S610和S620中，网络设备通过控制信道指示UE-1和UE-2检测port7和port8。比如，基于图4所示的网络设备(基站)100，调度器110指示MAC协议处理模块120向UE-1发送的PDCCH(Physical Downlink Control Channel物理下行控制信道)(采用DCI格式2B)，其中包括了2个传输块(对应port7和port8)，调度器110指示MAC协议处理模块120向UE-2发送的PDCCH(采用DCI格式2B)，其中包括了2个传输块(对应port7和port8)。
在S611和S621中，对于UE-1，网络设备不在port8上发送对应的参考信号和业务信道，对于UE-2，网络设备不在port7上发送对应的参考信号和业务信道。比如，基于图4所示的网络设备(基站)100，调度器110向基带处理模块130指示对UE-1不发送port8对应的参考信号和port8对应的PDSCH；调度器110向基带处理模块130指示对UE-2不发送port7对应的参考信号和port7对应的PDSCH。
在S612和S622中，UE-1和UE-2分别进行HARQ反馈。其中，对于UE-1，由于PDCCH指示了2个传输块(对应port7和port8)，UE-1的基带处理模块220将会对port7和port8都做信道估计，但由于网络设备实际并未对UE-1发送port8对应的参考信号和PDSCH，因此UE-1必然对port8承载的传输块响应NACK，对port7承载的传输块进行正常反馈；同理，对于UE-2，由于PDCCH指示了2个传输块(对应port7和port8)，UE-2的基带处理模块220将会对port7和port8都做信道估计，但由于网络设备实际并未对UE-2发送port7对应的参考信号和PDSCH，因此UE-2必然对port7承载的传输块响应NACK，对port8承载的传输块进行正常反馈。
在S613和S623中，网络设备分别处理UE-1和UE-2反馈的ACK/NACK。其中，当网络设备接收到UE-1针对port8上的传输块的NACK时，拒绝进行传输块重传；当用户设备接收到UE-2针对port7上的传输块的NACK时，拒绝进行传输块重传。举例来说，基于图4所示的网络设备(基站)100，对于UE-1，MAC协议处理模块120处理UE-1的NACK信息：对UE-1的port8对应的传输块的NACK不进行重传，对UE-1的port7对应的传输块，在初传的port上传输重传的传输块；对于UE-2，MAC协议处理模块120处理UE-2的NACK信息：对UE-2的port7对应的传输块的NACK不进行重传，对UE-2的port8对应的传输块，在初传的port上传输重传的传输块。
将上述流程600与现有技术比较可以看出，现有技术中，对2个Release 9版本的UE，当基站均采用port7调度UE-1和UE-2(采用不同的SCID来区分参考信号)，由于信道估计序列正交性差，UE侧干扰抑制性能较差；对于2个Release 9版本的UE，基站通过PDCCH指示UE-1检测port7，并指示UE-2检测port8，而UE侧在最简化处理或折中处理时，UE-1抑制UE-2带来的干扰都不是最优的。相比现有技术，本发明实施例的流程600中，由于PDCCH指示UE-1和UE-2对于port7和port8均做检测，从而可强制UE进行2个端口的信道估计和干扰抑制(即对于UE-1，UE-2的发送的信号也被估计出并加以抑制)，解决了MU-MIMO调度时UE侧接收处理性能差异大，抑制干扰能力不一致导致的多用户配对传输性能差问题，从而能获得相比现有技术更好的性能。
参见图7，若UE-1和UE-2均为Release 10或更高版本，则流程700被执行：
在S710和S720中，网络设备通过控制信道指示UE-1和UE-2检测port7～10。比如，基于图4所示的网络设备(基站)100，调度器110指示MAC协议处理模块120向UE-1发送的PDCCH(采用DCI格式2C)，其中包括了2个传输块，且DCI格式2C中对应表2中“two codewords”的字段值设置为3，即“4 layers，port7～10”；调度器110指示MAC协议处理模块120向UE-2发送的PDCCH(采用DCI格式2C)，其中包括了2个传输块，且DCI格式2C中对应表2中“two codewords”的字段值设置为3，即“4 layers，port7～10”。
在S711和S721中，对于UE-1，网络设备不在port9和port10上发送对应的参考信号和业务信道，对于UE-2，网络设备不在port7和port8上发送对应的参考信号和业务信道。比如，基于图4所示的网络设备(基站)100，调度器110向基带处理模块130指示对UE-1不发送port9和port10对应的参考信号以及port9和port10对应的PDSCH；调度器110向基带处理模块130指示对UE-2不发送port7和port8对应的参考信号以及port7和port8对应的PDSCH。
在S712和S722中，UE-1和UE-2分别进行HARQ反馈。其中，对于UE-1，由于PDCCH指示了2个传输块和4个层，UE-1的基带处理模块220将会对port7～10都做信道估计，但由于网络设备实际并未对UE-1发送port9和port10对应的参考信号和PDSCH，因此UE-1必然对UE-1的port9和port10承载的传输块响应NACK，对UE-1的port7和port8承载的传输块进行正常反馈；同理，对于UE-2，由于PDCCH指示了2个传输块和4个层，UE-2的基带处理模块220将会对port7～10都做信道估计，但由于网络设备实际并未对UE-2发送port7和port8对应的参考信号和PDSCH，因此UE-1必然对UE-2的port7和port8承载的传输块响应NACK，对UE-2的port9和port10承载的传输块进行正常反馈。
在S713和S723中，网络设备分别处理UE-1和UE-2反馈的ACK/NACK。其中，当网络设备接收到UE-1针对port9或port10上的传输块的NACK时，拒绝进行传输块重传；当网络 设备接收到UE-2针对port7或port8上的传输块的NACK时，拒绝进行传输块重传。举例来说，基于图4所示的网络设备(基站)100，对于UE-1，MAC协议处理模块120处理UE-1的NACK信息：对UE-1的port9和port10对应的传输块的NACK不进行重传，对UE-1的port7和port8对应的传输块，在初传的port上传输重传的传输块；对于UE-2，MAC协议处理模块120处理UE-2的NACK信息：对UE-2的port7和port8对应的传输块的NACK不进行重传，对UE-2的port9和port10对应的传输块，在初传的port上传输重传的传输块。
将上述流程700与现有技术比较可以看出，现有技术中，对于2个Release 10版本的UE，通过PDCCH指示UE-1检测port7(加扰ID＝0)和port8(加扰ID＝0)，并指示UE-2检测port7(加扰ID＝1)和port8(加扰ID＝1)，由于port7和port8本就占用相同的时频资源，而且采用的不同加扰ID对应的m序列正交性较差，UE侧接收时难以进行有效的干扰抑制，从而性能较差。相比现有技术，本发明实施例的流程700中，通过PDCCH指示UE-1和UE-2对于port7～10均做检测，但并在网络侧控制对UE-1实际只发送port7和port8的参考信号和PDSCH，对UE-2实际只发送port9和port10的参考信号和PDSCH，从而巧妙实现了令UE-1的实际有效参考信号位于port7和port8，而UE-2的实际有效参考信号位于port9和port10，由于port7～8和port9～10在频率上是不同的，从而有非常好的正交性，从而令UE侧能实现更加准确的信道估计，并进行有效的干扰抑制，即获得相比现有技术更好的性能。
参见图8，若UE1不低于Release 9版本且UE-2为Release 10或更高版本，则流程800被执行：
在S810和S820中，网络设备通过控制信道指示UE-1检测port7和/或port8，指示UE-2检测port7～10。比如，基于图4所示的网络设备(基站)100，调度器110指示MAC协议处理模块120向UE-1发送的PDCCH(采用DCI格式2B)，具体可根据实际信道状态包括1个或2个传输块(对应port7和/或port8)；调度器110指示MAC协议处理模块120向UE-2发送的PDCCH(采用DCI格式2C)，其中包括了2个传输块，且DCI格式2C中对应表2中“two codewords”的字段值设置为3，即“4 layers，port7～10”。
在S811和S821中，对于UE-1，网络设备在指示检测的端口上发送对应的参考信号和业务信道，对于UE-2，网络设备不在port7和port8上发送对应的参考信号和业务信道。比如，基于图4所示的网络设备(基站)100，调度器110指示基带处理模块130发送UE-1的PDCCH的1个或2个传输块对应的参考信号和PDSCH；调度器110向基带处理模块130指示对UE-2不发送port7和port8对应的参考信号以及port7和port8对应的PDSCH。
在S812和S822中，UE-1和UE-2分别进行HARQ反馈。其中，对于UE-1，UE-1的基带处理模块220将会对所指示检测的端口做信道估计，并对相应端口承载的传输块响应 ACK/NACK；对于UE-2，由于PDCCH指示了2个传输块和4个层，UE-2的基带处理模块220将会对port7～10都做信道估计，但由于网络设备实际并未对UE-2发送port7和port8对应的参考信号和PDSCH，因此UE-1必然对UE-2的port7和port8承载的传输块响应NACK，对UE-2的port9和port10承载的传输块进行正常反馈。
在S813和S823中，网络设备分别处理UE-1和UE-2反馈的ACK/NACK。其中，当网络设备接收到UE-1针对port7或port8上的传输块的ACK/NACK时，按照协议规定方式进行处理；当网络设备接收到UE-2针对port7或port8上的传输块的NACK时，拒绝进行传输块重传。举例来说，基于图4所示的网络设备(基站)100，对于UE-1，MAC协议处理模块120处理UE-1的NACK信息：对UE-1反馈为NACK的传输块进行重传；对于UE-2，MAC协议处理模块120处理UE-2的NACK信息：对UE-2的port7和port8对应的传输块的NACK不进行重传，对UE-2的port9和port10对应的传输块，在初传的port上传输重传的传输块。
将上述流程800与现有技术比较可以看出，现有技术中，对于UE-1为Release 9版本且UE-2 Release 10或更高版本时，通过PDCCH指示UE-1检测port7(加扰ID＝0)和port8(加扰ID＝0)，并指示UE-2检测port7(加扰ID＝1)和port8(加扰ID＝1)，由于port7和port8本就占用相同的时频资源，而且采用的不同加扰ID对应的m序列正交性较差，UE侧接收时难以进行有效的干扰抑制，从而性能较差。相比现有技术，本发明实施例的流程800中，通过PDCCH指示UE-1对port7和/或port8做检测，指示UE-2对port7～10做检测，但并在网络侧控制对UE-2实际只发送port9和port10的参考信号和PDSCH，从而巧妙实现了令UE-1的实际有效参考信号位于port7和/或port8，而UE-2的实际有效参考信号位于port9和port10，由于port7～8和port9～10在频率上是不同的，从而有非常好的正交性，从而令UE侧能实现更加准确的信道估计，并进行有效的干扰抑制，即获得相比现有技术更好的性能。
基于相同的技术构思，本发明实施例还提供了一种调度器，该调度器可应用于上述实施例中的网络设备。
参见图9，为本发明实施例提供的调度器的结构示意图。如图所示，该调度器300可包括确定单元310、端口检测指示单元320、调度单元330，其中：
确定单元310，用于确定进行MU-MIMO调度的用户设备对，所述用户设备对中包含第一用户设备和第二用户设备；
端口检测指示单元320，用于通过MAC协议处理模块分别指示所述用户设备对中的两个用户设备进行端口检测；
调度单元330，用于指示基带处理模块针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，以使所述网络设备向第一 用户设备发送参考信号和业务信道所使用的端口不同于向第二用户设备发送参考信号和业务信道所使用的端口。
优选地，端口检测指示单元320具体用于：若所述第一用户设备和第二用户设备的协议版本均不低于3GPP Release 9，则指示MAC协议处理模块通过控制信道指示所述第一用户设备和所述第二用户设备均检测端口7和端口8；相应的，调度单元330具体用于：指示基带处理模块对于所述第一用户设备不在端口8上发送对应的参考信号和业务信道，且对于所述第二用户设备不在端口7上发送对应的参考信号和业务信道。
优选地，端口检测指示单元320具体用于：若所述第一用户设备和第二用户设备的协议版本均不低于3GPP Release 10，则指示MAC协议处理模块通过控制信道指示所述第一用户设备和所述第二用户设备均检测端口7至端口10；相应的，调度单元330具体用于：指示基带处理模块对于所述第一用户设备不在端口9和端口10上发送对应的参考信号和业务信道，且对于所述第二用户设备不在端口7和端口8上发送对应的参考信号和业务信道。
优选地，端口检测指示单元具体用于：若所述第一用户设备的协议版本不低于3GPP Release 9，第二用户设备的协议版本不低于3GPP Release 10，则指示MAC协议处理模块通过控制信道指示所述第一用户设备检测端口7和/或端口8，且指示所述第二用户设备检测端口7至端口10；相应的，调度单元330具体用于：指示基带处理模块对于所述第一用户设备在指示检测的端口上发送对应的参考信号和业务信道，且对于所述第二用户设备不在端口7和端口8上发送对应的参考信号和业务信道。
优选地，调度单元330还用于：接收到所述第一用户设备或第二用户设备针对所指示检测的第一端口上传输的传输块返回的NACK时，若判断虽然指示所述第一用户设备或第二用户设备检测了所述第一端口，但并未在所述第一端口上发送传输块，则指示MAC协议处理模块拒绝针对所述NACK进行传输块重传。
基于相同的原理，本发明实施例还提供了一种基站，如图10所示，该基站主要包括：处理器410、存储器420，收发机430、总线接口440，其中处理器、存储器与收发机之间通过总线接口连接；
处理器410，用于读取存储器420中的程序，执行下列方法：确定进行多用户-多输入多输出MU-MIMO调度的用户设备对，所述用户设备对中包含第一用户设备和第二用户设备；分别指示所述用户设备对中的两个用户设备进行端口检测；以及，针对所述用户设备对中的至少一个用户设备，通过收发机430仅在所指示检测的部分端口上发送对应的参考信号和业务信道，以使所述网络设备向所述第一用户设备发送参考信号和业务信道所使用的端口不同于向所述第二用户设备发送参考信号和业务信道所使用的端口；
存储器420，用于存储一个或多个可执行程序，可以存储处理器410在执行操作时所使用的数据；
收发机430，用于在处理器410的控制下向所述用户设备发送参考信号和业务信道；
总线接口440提供接口，处理器负责管理总线架构和通常的处理。
其中，在图10中，总线构架可以包括任意数量的互联的总线和桥，具体由处理器410代表的一个或多个处理器和存储器420代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。
优选地，处理器410还用于：若所述第一用户设备和所述第二用户设备的协议版本均不低于3GPP Release 9，则指示所述第一用户设备和所述第二用户设备均检测端口7和端口8；以及，针对所述第一用户设备，通过收发机430仅在端口7上发送对应的参考信号和业务信道，且针对所述第二用户设备，仅在端口8上发送对应的参考信号和业务信道。
优选地，处理器410具体用于：若所述第一用户设备和第二用户设备的协议版本均不低于3GPP Release 10，则指示所述第一用户设备和所述第二用户设备均检测端口7至端口10；针对所述第一用户设备不在端口9和端口10上发送对应的参考信号和业务信道，且针对所述第二用户设备不在端口7和端口8上发送对应的参考信号和业务信道。
优选地，处理器410具体用于：若所述第一用户设备的协议版本不低于3GPP Release 9，所述第二用户设备的协议版本不低于3GPP Release 10，则指示所述第一用户设备检测端口7和/或端口8，且指示所述第二用户设备检测端口7至端口10；通过所述收发机430对于所述第一用户设备在指示检测的端口上发送对应的参考信号和业务信道，且对于所述第二用户设备不在端口7和端口8上发送对应的参考信号和业务信道。
优选地，处理器410还用于：接收到所述第一用户设备或所述第二用户设备针对所指示检测的第一端口上传输的传输块返回的否定确认NACK时，若判断所述基站虽然指示所述第一用户设备或所述第二用户设备检测了所述第一端口，但并未在所述第一端口上发送传输块，则拒绝针对所述NACK进行传输块重传。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图 和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器，使得通过该计算机或其他可编程数据处理设备的处理器执行的指令可实现流程图中的一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图的一个流程或多个流程和/或方框图的一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (21)

  1. 一种用户调度方法，其特征在于，包括：
    网络设备确定进行多用户-多输入多输出MU-MIMO调度的用户设备对，所述用户设备对中包含第一用户设备和第二用户设备；
    所述网络设备分别指示所述用户设备对中的两个用户设备进行端口检测；
    所述网络设备针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，以使所述网络设备向所述第一用户设备发送参考信号和业务信道所使用的端口不同于向所述第二用户设备发送参考信号和业务信道所使用的端口。
  2. 如权利要求1所述的方法，其特征在于，所述网络设备分别指示所述用户设备对中的两个用户设备进行端口检测，包括：
    若所述第一用户设备和所述第二用户设备的协议版本均不低于3GPP Release 9，则所述网络设备通过控制信道指示所述第一用户设备和所述第二用户设备均检测端口7和端口8；
    所述网络设备针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，包括：
    所述网络设备针对所述第一用户设备，仅在端口7上发送对应的参考信号和业务信道，且针对所述第二用户设备，仅在端口8上发送对应的参考信号和业务信道。
  3. 如权利要求1所述的方法，其特征在于，所述网络设备分别指示所述用户设备对中的两个用户设备进行端口检测，包括：
    若所述第一用户设备和所述第二用户设备的协议版本均不低于3GPP Release 10，则所述网络设备通过控制信道指示所述第一用户设备和所述第二用户设备均检测端口7至端口10；
    所述网络设备针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，包括：
    所述用户设备针对所述第一用户设备，不在端口9和端口10上发送对应的参考信号和业务信道，且针对所述第二用户设备，不在端口7和端口8上发送对应的参考信号和业务信道。
  4. 如权利要求1所述的方法，其特征在于，所述网络设备分别指示所述用户设备对中的两个用户设备进行端口检测，包括：
    若所述第一用户设备的协议版本不低于3GPP Release 9，所述第二用户设备的协议版本 不低于3GPP Release 10，则所述网络设备通过控制信道指示所述第一用户设备检测端口7和/或端口8，且指示所述第二用户设备检测端口7至端口10；
    所述网络设备针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，包括：
    所述网络设备针对所述第一用户设备，在指示检测的端口上发送对应的参考信号和业务信道，且针对所述第二用户设备，不在端口7和端口8上发送对应的参考信号和业务信道。
  5. 如权利要求2-4中任一项所述的方法，其特征在于，所述控制信道为物理下行控制信道PDCCH，所述业务信道为物理下行链路共享信道PDSCH。
  6. 如权利要求1-4中任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备接收到所述第一用户设备或所述第二用户设备针对所指示检测的第一端口上传输的传输块返回的否定确认NACK时，若判断所述网络设备虽然指示所述第一用户设备或所述第二用户设备检测了所述第一端口，但并未在所述第一端口上发送传输块，则拒绝针对所述NACK进行传输块重传。
  7. 一种调度器，其特征在于，包括：
    确定单元，用于确定进行多用户-多输入多输出MU-MIMO调度的用户设备对，所述用户设备对中包含第一用户设备和第二用户设备；
    端口检测指示单元，用于通过媒体接入控制MAC协议处理模块，分别指示所述用户设备对中的两个用户设备进行端口检测；
    调度单元，用于指示基带处理模块针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，以使所述网络设备向所述第一用户设备发送参考信号和业务信道所使用的端口不同于向所述第二用户设备发送参考信号和业务信道所使用的端口。
  8. 如权利要求7所述的调度器，其特征在于，所述端口检测指示单元具体用于：若所述第一用户设备和所述第二用户设备的协议版本均不低于3GPP Release 9，则指示所述MAC协议处理模块通过控制信道指示所述第一用户设备和所述第二用户设备均检测端口7和端口8；
    所述调度单元具体用于：指示所述基带处理模块针对所述第一用户设备不在端口8上发送对应的参考信号和业务信道，且针对所述第二用户设备不在端口7上发送对应的参考信号和业务信道。
  9. 如权利要求7所述的调度器，其特征在于，所述端口检测指示单元具体用于：若所述第一用户设备和第二用户设备的协议版本均不低于3GPP Release 10，则指示所述MAC协 议处理模块通过控制信道指示所述第一用户设备和所述第二用户设备均检测端口7至端口10；
    所述调度单元具体用于：指示所述基带处理模块针对所述第一用户设备不在端口9和端口10上发送对应的参考信号和业务信道，且针对所述第二用户设备不在端口7和端口8上发送对应的参考信号和业务信道。
  10. 如权利要求7所述的调度器，其特征在于，所述端口检测指示单元具体用于：若所述第一用户设备的协议版本不低于3GPP Release 9，所述第二用户设备的协议版本不低于3GPP Release 10，则指示所述MAC协议处理模块通过控制信道，指示所述第一用户设备检测端口7和/或端口8，且指示所述第二用户设备检测端口7至端口10；
    所述调度单元具体用于：指示所述基带处理模块针对所述第一用户设备在指示检测的端口上发送对应的参考信号和业务信道，且针对所述第二用户设备不在端口7和端口8上发送对应的参考信号和业务信道。
  11. 如权利要求7-10中任一项所述的调度器，其特征在于，所述调度单元还用于：接收到所述第一用户设备或所述第二用户设备针对所指示检测的第一端口上传输的传输块返回的否定确认NACK时，若判断虽然指示所述第一用户设备或所述第二用户设备检测了所述第一端口，但并未在所述第一端口上发送传输块，则指示所述MAC协议处理模块拒绝针对所述NACK进行传输块重传。
  12. 一种网络设备，其特征在于，包括：媒体接入控制MAC协议处理模块、基带处理模块、调度器；
    所述调度器，用于确定进行多用户-多输入多输出MU-MIMO调度的用户设备对，所述用户设备对中包含第一用户设备和第二用户设备；通过所述MAC协议处理模块分别指示所述用户设备对中的两个用户设备进行端口检测；以及，指示所述基带处理模块针对所述用户设备对中的至少一个用户设备，仅在所指示检测的部分端口上发送对应的参考信号和业务信道，以使所述网络设备向所述第一用户设备发送参考信号和业务信道所使用的端口不同于向所述第二用户设备发送参考信号和业务信道所使用的端口。
  13. 如权利要求12所述的网络设备，其特征在于，所述调度器具体用于：若所述第一用户设备和所述第二用户设备的协议版本均不低于3GPP Release 9，则指示所述MAC协议处理模块通过控制信道，指示所述第一用户设备和所述第二用户设备均检测端口7和端口8；以及，指示所述基带处理模块针对所述第一用户设备，仅在端口7上发送对应的参考信号和业务信道，且针对所述第二用户设备，仅在端口8上发送对应的参考信号和业务信道。
  14. 如权利要求12所述的网络设备，其特征在于，所述调度器具体用于：若所述第一 用户设备和第二用户设备的协议版本均不低于3GPP Release 10，则指示所述MAC协议处理模块通过控制信道，指示所述第一用户设备和所述第二用户设备均检测端口7至端口10；指示所述基带处理模块针对所述第一用户设备不在端口9和端口10上发送对应的参考信号和业务信道，且针对所述第二用户设备不在端口7和端口8上发送对应的参考信号和业务信道。
  15. 如权利要求12所述的网络设备，其特征在于，所述调度器具体用于：若所述第一用户设备的协议版本不低于3GPP Release 9，所述第二用户设备的协议版本不低于3GPP Release 10，则指示所述MAC协议处理模块通过控制信道，指示所述第一用户设备检测端口7和/或端口8，且指示所述第二用户设备检测端口7至端口10；指示所述基带处理模块，对于所述第一用户设备在指示检测的端口上发送对应的参考信号和业务信道，且对于所述第二用户设备不在端口7和端口8上发送对应的参考信号和业务信道。
  16. 如权利要求12-15中任一项所述的网络设备，其特征在于，所述调度器还用于：
    接收到所述第一用户设备或所述第二用户设备针对所指示检测的第一端口上传输的传输块返回的否定确认NACK时，若判断所述网络设备虽然指示所述第一用户设备或所述第二用户设备检测了所述第一端口，但并未在所述第一端口上发送传输块，则指示所述MAC协议处理模块拒绝针对所述NACK进行传输块重传。
  17. 一种基站，其特征在于，包括：处理器、存储器、收发机、总线接口，其中处理器、存储器与收发机之间通过总线接口连接；
    所述处理器，用于读取所述存储器中的程序，执行下列方法：确定进行多用户-多输入多输出MU-MIMO调度的用户设备对，所述用户设备对中包含第一用户设备和第二用户设备；分别指示所述用户设备对中的两个用户设备进行端口检测；以及，针对所述用户设备对中的至少一个用户设备，通过所述收发机仅在所指示检测的部分端口上发送对应的参考信号和业务信道，以使所述网络设备向所述第一用户设备发送参考信号和业务信道所使用的端口不同于向所述第二用户设备发送参考信号和业务信道所使用的端口；
    所述存储器，用于存储一个或多个可执行程序，可以存储所述处理器在执行操作时所使用的数据；
    所述收发机，用于在所述处理器的控制下向所述用户设备发送参考信号和业务信道；
    所述总线接口，用于提供接口。
  18. 如权利要求17所述的基站，其特征在于，所述处理器具体用于：若所述第一用户设备和所述第二用户设备的协议版本均不低于3GPP Release 9，则指示所述第一用户设备和所述第二用户设备均检测端口7和端口8；以及，针对所述第一用户设备，通过所述收发机 仅在端口7上发送对应的参考信号和业务信道，且针对所述第二用户设备，仅在端口8上发送对应的参考信号和业务信道。
  19. 如权利要求17所述的基站，其特征在于，所述处理器具体用于：若所述第一用户设备和第二用户设备的协议版本均不低于3GPP Release 10，则指示所述第一用户设备和所述第二用户设备均检测端口7至端口10；针对所述第一用户设备不在端口9和端口10上发送对应的参考信号和业务信道，且针对所述第二用户设备不在端口7和端口8上发送对应的参考信号和业务信道。
  20. 如权利要求17所述的基站，其特征在于，所述处理器具体用于：若所述第一用户设备的协议版本不低于3GPP Release 9，所述第二用户设备的协议版本不低于3GPP Release 10，则指示所述第一用户设备检测端口7和/或端口8，且指示所述第二用户设备检测端口7至端口10；通过所述收发机对于所述第一用户设备在指示检测的端口上发送对应的参考信号和业务信道，且对于所述第二用户设备不在端口7和端口8上发送对应的参考信号和业务信道。
  21. 如权利要求17-20中任一项所述的基站，其特征在于，所述处理器还用于：
    接收到所述第一用户设备或所述第二用户设备针对所指示检测的第一端口上传输的传输块返回的否定确认NACK时，若判断所述基站虽然指示所述第一用户设备或所述第二用户设备检测了所述第一端口，但并未在所述第一端口上发送传输块，则拒绝针对所述NACK进行传输块重传。
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