WO2019141233A1 - 一种协作传输控制的方法、装置及系统 - Google Patents

一种协作传输控制的方法、装置及系统 Download PDF

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Publication number
WO2019141233A1
WO2019141233A1 PCT/CN2019/072313 CN2019072313W WO2019141233A1 WO 2019141233 A1 WO2019141233 A1 WO 2019141233A1 CN 2019072313 W CN2019072313 W CN 2019072313W WO 2019141233 A1 WO2019141233 A1 WO 2019141233A1
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WIPO (PCT)
Prior art keywords
primary
information
interference
transmission
slave
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PCT/CN2019/072313
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English (en)
French (fr)
Inventor
廖湘柏
刘应状
于健
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2020539702A priority Critical patent/JP6985521B2/ja
Publication of WO2019141233A1 publication Critical patent/WO2019141233A1/zh
Priority to US16/931,551 priority patent/US11683077B2/en
Priority to US18/317,619 priority patent/US20230283330A1/en

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    • 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
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0212—Channel estimation of impulse response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/27—Control channels or signalling for resource management between access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • the present application relates to the field of communication technologies, and in particular, to techniques for cooperative transmission control in a communication system.
  • WLAN devices are becoming more and more dense.
  • APs access points
  • increasingly dense APs also bring more inter-cell interference. How to prevent inter-user or inter-cell interference through the control of cooperative transmission between APs and improve the quality of service to users is a problem to be considered.
  • the present application provides a method, device, and system for cooperative transmission control, which are used to implement cooperative transmission between multiple APs to prevent interference.
  • a method and apparatus for cooperative transmission control is provided.
  • the method is applied to the access point AP or to the station STA corresponding to the slave AP.
  • the method includes: receiving, from an access point AP, a coordinated transmission request sent by a primary AP, where the coordinated transmission request carries negotiation parameter information; when the secondary AP wants to cooperate with the primary AP according to the negotiation parameter information,
  • the slave AP sends the interference test information to the primary AP, and receives the decision information sent by the primary AP according to the interference test information whether to perform coordinated transmission.
  • the primary AP may perform uplink transmission by the STAs in the cell to be scheduled, and the downlink transmission may be performed by the STAs in the cell that the AP may be scheduled to be scheduled, but is not limited thereto.
  • the dual decision conditions of inter-cell configuration parameter sharing and interference test are used to determine whether to perform coordinated transmission, so that the access point can know the interference situation in advance, preventing interference when actually performing cooperative transmission, and causing unnecessary retransmission. Improve communication efficiency.
  • the slave AP when the slave AP does not want to cooperate with the primary AP according to the negotiation parameter information, the slave AP does not feed back the primary AP within a preset time, or The primary AP sends the first response information, indicating that the secondary AP cannot perform coordinated transmission.
  • the secondary AP when the secondary AP wants to cooperate with the primary AP, the secondary AP sends second response information to the primary AP, to indicate that the secondary AP wants to perform coordinated transmission; It can be understood that the second response information is sent together with the interference test information or separately.
  • the coordinated transmission request carries first indication information, where the first indication information is used to indicate whether the interference test information is sent together with the second response information.
  • the decision information is carried in the cooperation confirmation frame or carried in an uplink transmission trigger frame sent to the STA to be scheduled.
  • the negotiation parameter information includes at least one of the following: an antenna number of the primary AP, and a spatial flow number of the primary AP corresponding cell.
  • the sending the interference test information from the AP to the primary AP includes: if the number of spatial streams is less than or equal to the number of antennas of the primary AP, and the number of antennas of the secondary AP is greater than the number of antennas of the primary AP.
  • the slave AP sends the interference test information to the primary AP by using the first precoding matrix Q 2 , where the Q 2 is generated by the slave AP according to a preset first criterion to avoid receiving data from the primary AP.
  • the precoding matrix of the interference or, if the number of the spatial streams is smaller than the number of antennas of the primary AP, and the number of antennas of the secondary AP is less than or equal to the number of antennas of the primary AP, the secondary AP sends the second indication information to the primary AP.
  • the slave AP can determine the beamforming mode to avoid interference by differently configuring the parameters for the cell, thereby effectively avoiding interference.
  • the device is defined in a functional form, and may be an access node AP or a site STA, for example, may be an access device or a site device, or may be a chip or a functional module in the device, and may be implemented by software, hardware, or The hardware executes the corresponding software to implement the above method.
  • the apparatus can include a processor and a memory.
  • the processor is configured to support the apparatus to perform the corresponding functions of the first aspect method described above.
  • the memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device.
  • the apparatus can also include a communication interface for supporting communication between the apparatus and other network elements.
  • the communication interface can be a transceiver.
  • the device may include a transceiver unit, where the transceiver unit is configured to receive a coordinated transmission request sent by the primary AP, send interference test information to the primary AP, and receive the primary AP according to the interference test.
  • the information of the information transmission indicates whether or not to perform cooperative transmission.
  • the device may further include a processing unit, configured to determine, according to the negotiation parameter information, that the communication is to be performed in cooperation with the primary AP.
  • the method is applied to the primary access point AP or to the station STA corresponding to the primary AP.
  • the method includes: the primary access point AP sends a coordinated transmission request to the at least one secondary access point AP, where the coordinated transmission request carries the negotiation parameter information; when the secondary AP wants to cooperate with the primary AP according to the negotiation parameter information During transmission, the primary AP receives the interference test information sent by the secondary AP; the primary AP performs a reception interference test according to the interference test information to determine whether the interference is greater than or equal to a predetermined threshold; according to the determination result, The primary AP sends a decision message to the secondary AP to indicate whether the secondary AP performs coordinated transmission.
  • the primary AP may perform uplink transmission by the STAs in the cell to be scheduled, and the downlink transmission may be performed by the STAs in the cell that the AP may be scheduled to be scheduled, but is not limited thereto.
  • the dual decision conditions of inter-cell configuration parameter sharing and interference test are used to determine whether to perform coordinated transmission, so that the access point can know the interference situation in advance, preventing interference when actually performing cooperative transmission, and causing unnecessary retransmission. Improve communication efficiency.
  • the primary AP when the slave AP determines that the primary AP does not cooperate with the primary AP according to the negotiation parameter information, the primary AP does not receive the feedback from the AP within a preset time, or Receiving the first response information sent by the slave AP, indicating that the slave AP cannot perform coordinated transmission.
  • the primary AP when the slave AP wants to cooperate with the primary AP, the primary AP receives the second response information sent by the secondary AP, and is used to indicate that the secondary AP wants to perform coordinated transmission.
  • the second response information is sent together with the interference test information, or sent separately.
  • the coordinated transmission request carries first indication information, where the first indication information is used to indicate whether the interference test information is sent together with the second response information.
  • the decision information is carried in the cooperation confirmation frame or carried in the trigger frame of the uplink transmission of the station STA to be scheduled.
  • the negotiation parameter information includes at least one of the following: the number of antennas of the primary AP and the number of spatial streams of the primary AP corresponding to the cell.
  • the primary AP receives the interference test information sent by the AP, including: if the number of spatial streams is less than or equal to the number of antennas of the primary AP, and the number of antennas of the secondary AP is greater than the antenna of the primary AP.
  • the master AP receives the interference test using the first precoding matrix information transmitted from the AP Q 2, Q 2 is the said determined from the AP in accordance with a predetermined first standard to avoid receiving the master AP
  • the data generates an interference precoding matrix; or, if the number of spatial streams is smaller than the number of antennas of the primary AP, and the number of antennas of the secondary AP is less than or equal to the number of antennas of the primary AP, the primary AP also receives the sent by the secondary AP.
  • the second indication information is used to indicate that the primary AP receives the received equalization matrix W 1 of the data, and receives the interference test information that is sent by the AP from the second precoding matrix Q 2 ′, where the Q 2 ′ W 1 is a receiving equalization matrix of the precoding matrix and the primary AP receiving data for the slave AP to transmit data, which is determined by the AP according to the preset second standard to avoid interference with the primary AP receiving data.
  • the slave AP can determine the beamforming mode to avoid interference by differently configuring the parameters for the cell, thereby effectively avoiding interference.
  • the device for cooperative transmission control is provided that can implement a corresponding method in the second aspect.
  • the device is defined in a functional form, and may be an access node AP or a site STA, for example, may be an access device or a site device, or may be a chip or a functional module in the device, and may be implemented by software, hardware, or The hardware executes the corresponding software to implement the above method.
  • the apparatus can include a processor and a memory.
  • the processor is configured to support the apparatus to perform the corresponding functions of the second aspect method described above.
  • the memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device.
  • the apparatus can also include a communication interface for supporting communication between the apparatus and other network elements.
  • the communication interface can be a transceiver.
  • the device may include a transceiver unit, where the transceiver unit is configured to send a coordinated transmission request to the at least one slave AP, receive the interference test information sent by the slave AP, and send the interference test information to the slave AP.
  • the transmission decision information indicates whether the slave AP performs coordinated transmission.
  • the device may further include a processing unit, configured to perform a receiving interference test according to the interference test information to determine whether the interference is greater than or equal to a predetermined threshold.
  • a method and apparatus for cooperative transmission control is provided.
  • the method is applied to the access point AP or to the station STA corresponding to the slave AP.
  • the method includes: receiving, from an access point AP, a coordinated transmission request sent by a primary AP, where the coordinated transmission request carries negotiation parameter information; when the secondary AP wants to cooperate with the primary AP according to the negotiation parameter information, The slave AP sends the first response information to the primary AP to indicate that the slave AP wants to perform coordinated transmission; the slave AP receives interference test information sent by the primary AP; and the slave AP according to the interference test information interference Test the results to determine whether to perform collaborative transmission.
  • the primary AP may perform downlink transmission on the STAs in the cell to be scheduled, and the uplink STA may be transmitted from the STAs in the cell to be scheduled by the AP, but is not limited thereto.
  • the dual decision conditions of inter-cell configuration parameter sharing and interference test are used to determine whether to perform coordinated transmission, so that the access point can know the interference situation in advance, preventing interference when actually performing cooperative transmission, and causing unnecessary retransmission. Improve communication efficiency.
  • the slave AP determines that the primary AP does not cooperate with the primary AP according to the negotiation parameter information, the slave AP does not feed back the primary AP within a preset time, or The primary AP sends the second response information, indicating that the secondary AP cannot perform coordinated transmission.
  • the slave AP determines whether to perform coordinated transmission according to the interference test result of the interference test information, including: if the interference is less than or equal to a predetermined threshold, the slave AP to the to-be-scheduled The second station STA sends a trigger frame, and the second STA is scheduled to perform uplink data transmission; if the interference is greater than the predetermined threshold, the slave AP does not send the trigger frame; or, if the interference is less than a predetermined threshold, The slave AP sends a trigger frame to the second STA to be scheduled, and the second STA is scheduled to perform uplink data transmission; if the interference is greater than or equal to a predetermined threshold, the slave AP does not send the trigger frame.
  • the interference test information includes information about a corresponding training field in a downlink data packet sent by the primary AP to the first STA to be scheduled; or the interference test information is the primary AP. And transmitting, by the first STA, information of a corresponding field in a separate data packet sent before the downlink data packet.
  • the transmission of the trigger frame is in the downlink data. Initiating during transmission of the packet, the uplink data transmission of the second STA to be scheduled ends before the end of the transmission of the data field in the downlink data packet, or ends simultaneously with the transmission of the data field in the downlink data packet Or when the interference test information includes information of a corresponding field in the individual data packet sent by the primary AP to the first STA, the transmission of the trigger frame is sent to the first STA in the primary AP.
  • the uplink data transmission of the second STA to be scheduled ends before the end of the transmission of the data field in the downlink data packet, or in the downlink data packet
  • the transfer of the data field ends at the same time.
  • the negotiation parameter information includes at least one of the following: the number of antennas of the primary AP and the number of spatial streams of the primary AP corresponding to the cell.
  • the receiving, by the AP, the interference test information sent by the primary AP includes: receiving, by the AP, the interference sent by the primary AP by using the selected receiving equalization matrix that prevents the primary AP from interfering with the received data. Test information; wherein, if the number of spatial streams is less than or equal to the number of antennas of the primary AP, and the number of antennas of the AP is greater than the number of antennas of the primary AP, the secondary AP selects the first received equalization matrix W 2 according to the first criterion.
  • the secondary AP selects the second received equalization matrix W 2 ' according to the second criterion and the master AP transmits data precoding matrix Q 1; test before receiving the interference information sent by the AP from the AP master, further comprising: sending the first indication information to the master AP from the AP, for indicating the The primary AP transmits a precoding matrix Q 1 of data .
  • the slave AP can determine the beamforming mode to avoid interference by differently configuring the parameters for the cell, thereby effectively avoiding interference.
  • the device for cooperative transmission control is provided that can implement a corresponding method in the third aspect.
  • the device is defined in a functional form, and may be an access node AP or a site STA, for example, may be an access device or a site device, or may be a chip or a functional module in the device, and may be implemented by software, hardware, or The hardware executes the corresponding software to implement the above method.
  • the apparatus can include a processor and a memory.
  • the processor is configured to support the apparatus to perform the corresponding functions of the method of the third aspect described above.
  • the memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device.
  • the apparatus can also include a communication interface for supporting communication between the apparatus and other network elements.
  • the communication interface can be a transceiver.
  • the device may include a transceiver unit, where the transceiver unit is configured to receive a coordinated transmission request sent by the primary AP, send the first response information to the primary AP, and receive the interference test sent by the primary AP. information.
  • the device may further include a processing unit, configured to determine whether to perform coordinated transmission according to the interference test result of the interference test information.
  • a method and apparatus for cooperative transmission control is provided.
  • the method is applied to the primary access point AP or to the station STA corresponding to the primary AP.
  • the method includes: the primary access point AP sends a coordinated transmission request to the secondary AP, where the coordinated transmission request carries the negotiation parameter information; when the secondary AP wants to cooperate with the primary AP according to the negotiation parameter information, Receiving, by the primary AP, the first response information sent by the secondary AP to indicate that the secondary AP desires to perform coordinated transmission; the primary AP sends interference test information to the secondary AP; and the interference test information is used by the secondary AP Perform interference tests to determine if a coordinated transmission is taking place.
  • the primary AP may perform downlink transmission on the STAs in the cell to be scheduled, and the uplink STA may be transmitted from the STAs in the cell to be scheduled by the AP, but is not limited thereto.
  • the dual decision conditions of inter-cell configuration parameter sharing and interference test are used to determine whether to perform coordinated transmission, so that the access point can know the interference situation in advance, preventing interference when actually performing cooperative transmission, and causing unnecessary retransmission. Improve communication efficiency.
  • the slave AP determines that the primary AP does not cooperate with the primary AP according to the negotiation parameter information, the primary AP does not receive the feedback from the AP within a preset time, or And receiving the second response information sent by the slave AP, to indicate that the slave AP cannot perform coordinated transmission.
  • the method further includes: the primary AP receiving the first indication information sent by the secondary AP, where the first indication information is used to indicate a precoding matrix Q of the primary AP sending data. 1; test information using the interference of Q 1 is transmitted.
  • the slave AP can determine the beamforming mode to avoid interference by differently configuring the parameters for the cell, thereby effectively avoiding interference.
  • the interference test information includes information about a corresponding training field in a downlink data packet sent by the primary AP to a STA to be scheduled; or the interference test information is given by the primary AP.
  • the information of the corresponding field in the individual data packet sent by the scheduling station STA before sending the downlink data packet is mentioned.
  • the negotiation parameter information includes at least one of the following: the number of antennas of the primary AP and the number of spatial streams of the primary AP corresponding to the cell.
  • the device is defined in a functional form, and may be an access node AP or a site STA, for example, may be an access device or a site device, or may be a chip or a functional module in the device, and may be implemented by software, hardware, or The hardware executes the corresponding software to implement the above method.
  • the apparatus can include a processor and a memory.
  • the processor is configured to support the apparatus to perform the corresponding functions of the method of the fourth aspect described above.
  • the memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device.
  • the apparatus can also include a communication interface for supporting communication between the apparatus and other network elements.
  • the communication interface can be a transceiver.
  • the apparatus may include a transceiver unit, where the transceiver unit is configured to send a coordinated transmission request to the slave AP, receive the first response information sent by the slave AP, and send interference to the slave AP. Test information.
  • the device may further comprise a processing unit, configured to determine information to be sent, or process the received information.
  • the application also provides a computer storage medium having stored thereon a computer program (instructions) that, when executed on a computer, cause the computer to perform the method of any of the above aspects.
  • the application also provides a computer program product, when run on a computer, causing the computer to perform the method of any of the above aspects.
  • the present application also provides a chip for cooperative transmission control in which instructions are stored that, when run on a communication device, cause the communication device to perform the corresponding methods described in the various aspects above.
  • the present application also provides an apparatus for cooperative transmission control, comprising a memory, a processor, and a computer program stored on the memory and operable on the processor, the processor executing the computer program to implement the above aspects Corresponding method.
  • the present application also provides an apparatus for cooperative transmission control, comprising a processor for coupling with a memory and reading instructions in the memory, and implementing the corresponding method described in the above aspects in accordance with the instructions.
  • a processor for coupling with a memory and reading instructions in the memory, and implementing the corresponding method described in the above aspects in accordance with the instructions.
  • the memory can be integrated in the processor or independently of the processor.
  • the present application also provides an apparatus for cooperative transmission control, comprising a processor that, when executing a computer program, implements the corresponding method described in the above aspects.
  • the present application also provides a system for cooperative transmission control, including the apparatus on the primary AP side provided above, and at least one apparatus provided on the secondary side of the AP, which system components respectively implement the corresponding methods described in the above aspects.
  • 1 is a network system architecture involved in the present application
  • FIG. 2 is a flow chart of a first embodiment of a method for cooperative transmission control provided by the present application
  • FIG. 3 is a schematic diagram of a format of cooperative (parallel) transmission request information provided by the present application.
  • FIG. 4 is a flowchart of a second embodiment of a method for cooperative transmission control provided by the present application.
  • FIG. 5 is a flowchart of a first embodiment of another method for cooperative transmission control provided by the present application.
  • FIG. 6 is a flowchart of a second embodiment of another method for cooperative transmission control provided by the present application.
  • FIG. 7a is a schematic diagram of a cooperative (parallel) transmission response information format provided by the present application.
  • FIG. 7b is a schematic diagram of another cooperative (parallel) transmission response information format provided by the present application.
  • FIG. 7c is a schematic diagram of another cooperative (parallel) transmission response information format provided by the present application.
  • 7d is a schematic diagram of a cooperative (parallel) transmission response information and interference test information transmission manner provided by the present application;
  • 7e is a schematic diagram of another cooperative (parallel) transmission response information format provided by the present application.
  • 7f is a schematic diagram of another cooperative (parallel) transmission response information format provided by the present application.
  • 7g is a schematic diagram of a cooperative (parallel) transmission response information and interference test information transmission manner provided by the present application;
  • 7h is a schematic diagram of another cooperative (parallel) transmission response information format provided by the present application.
  • FIG. 8a is a schematic diagram of an AP2 scheduling occasion provided by the present application.
  • FIG. 8b is another schematic diagram of an AP2 scheduling occasion provided by the present application.
  • FIG. 9 is a schematic structural diagram of an apparatus for simplified cooperative transmission control provided by the present application.
  • FIG. 10 is a schematic structural diagram of a simplified network device provided by the present application.
  • Multiple in this application means two or more.
  • the term “and/or” in the present application is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist at the same time. There are three cases of B alone.
  • the character "/" in this article generally indicates that the contextual object is an "or” relationship.
  • the terms “first”, “second”, and the like in this application are used to distinguish different objects, and do not limit the order of the different objects.
  • the Access Point (AP) mentioned in this application is a network device deployed in a radio access network to provide wireless communication functions for terminal devices. It can be responsible for scheduling and configuring STAs. Up/down transmission.
  • the access point may include various forms of macro base stations, micro base stations, relay stations, access points, etc., including as systems and devices that improve upon peer devices in conventional wireless telecommunications systems.
  • Such advanced or next-generation devices may be included in a long-term evolution LTE communication system, a 5G communication system, a future evolution system, or a plurality of communication fusion systems, and devices having access point functions in systems employing different wireless access technologies
  • the name may vary.
  • the above-mentioned devices that provide wireless communication functions for STAs are collectively referred to as an access point or an AP.
  • cooperative transmission refers to a communication mode in which at least two APs/STAs perform communication transmission within a cell, but in order to avoid mutual interference between two cells. This cooperative transmission can also be called parallel transmission because at least two AP/STAs are transmitting at the same time.
  • FIG. 1 shows a network system architecture involved in the present application.
  • this system there are two or more APs, and for each AP, there are one or more STAs associated with them.
  • a plurality of APs have one primary AP (such as AP1) and at least one secondary AP (such as AP2, AP3, etc.), and the AP1 is a primary AP that is contending for the channel usage right or the AC is elected from the AP group.
  • primary AP such as AP1
  • secondary AP such as AP2, AP3, etc.
  • the AP1 may also be an access point that the AP group elects or competes as an AP group control point according to a predetermined rule, and may be an AP group.
  • Implement control and management functions such as transmission and resources, and coordinate multiple APs for coordinated transmission.
  • the control and management functions of the AP group can be implemented by an additional access controller (Access Controller, AC for short).
  • the AP group can also be configured with an additional AC to coordinate multiple APs for coordinated transmission. Wired transmission may be used between APs, APs, and ACs, or wireless transmission may be used.
  • the downlink transmission of AP2 may cause strong interference to AP1 received upstream due to the close distance.
  • the downlink transmission of AP1 may cause strong interference to AP2 received in the uplink;
  • the cell of AP1 and the cell of AP2 cannot be cooperatively transmitted, which results in low communication efficiency. Therefore, in the present application, interference control is achieved while improving communication efficiency by cooperative transmission control between the primary AP and the secondary AP.
  • FIG. 2 is a flowchart of a first embodiment of a method for cooperative transmission control according to an embodiment of the present application. This embodiment is described by taking an example of an AP1 to be uplink transmission and an AP 2 to be downlink transmission. , but not limited to this, the station corresponding to the scheduled AP1 is STA1, and the station corresponding to the scheduled AP2 is STA2.
  • the present embodiment and the subsequent embodiments take the AP2 as the slave access point as an example, and describe the whole from the perspective of the interaction, but the improvement in the system is not the step of the interaction side. Must be implemented together, the technical solution proposed in this application has improvements on each side of the system.
  • the method includes:
  • an AP After an AP obtains the channel usage right, or after it has been elected in the system, it is determined to be the primary (that is, AP1).
  • the other APs in the system are the secondary APs (for example, AP2, AP3, ).
  • the data transmission of AP1 and the scheduling of AP1 correspond to station STA1.
  • the AP1 determines that the STA1 is scheduled to perform uplink transmission, and sends a coordinated transmission request to the secondary AP (such as the AP2).
  • the information format of the coordinated transmission request may be an action frame. For details, refer to FIG. 3 and FIG.
  • a schematic diagram of a cooperative (cooperative) transmission request information format is provided, which may carry negotiation parameter information, optionally including at least one of the following: the number of antennas of the AP1, the number of spatial streams in the AP1 cell 1, and the basic service set color.
  • BSS Color Basic Service Set Color
  • BSS Color is used to identify the cell and the sending address of the AP1 service (that is, the address of the AP1)
  • the uplink and downlink indications are used to indicate whether the AP1 is uplink or downlink (in the present embodiment, the uplink) and the receiving address.
  • the bandwidth/resource block in which the STA1 to be scheduled transmits data does not constitute a limitation on the present application, and may include, for example, transmission power, modulation and coding information, and the like.
  • the AP2 determines, according to the negotiation parameter information, whether to perform coordinated transmission with the AP1.
  • the AP2 may determine whether to perform coordinated transmission with the AP1. For example, the AP2 determines whether it can perform cooperative transmission with the AP1 according to the number of the spatial streams and the number of antennas of the AP1, and the number of its own antennas.
  • the AP2 cannot prevent interference with the uplink data received by the AP1 through the spatial reservation direction, and cannot perform cooperative transmission;
  • the number of spatial streams is less than or equal to the number of antennas of AP1, and the number of antennas of AP2 is greater than the number of antennas of AP1, or if the number of spatial streams is smaller than the number of antennas of AP1, and the number of antennas of AP2 is less than or equal to the number of antennas of AP1, AP2
  • the spatial reservation direction can be used to prevent the AP1 from receiving the uplink data, and the coordinated transmission can be performed.
  • the foregoing is only an example of the present application.
  • the AP2 determines whether to cooperate with the AP1, and is not limited to this manner.
  • the step is an optional step.
  • the AP2 determines that the AP1 does not perform coordinated transmission with the AP1, the information that cannot be cooperatively transmitted may be fed back to the AP1 by using the step.
  • the AP2 is configured.
  • the cooperative transmission request may not be replied within a preset time to enable the AP1 to determine that the AP2 cannot perform cooperative transmission, and the operation of the step is not required.
  • AP1 may continue to select a secondary cell (such as AP3) of other cells for cooperative transmission, or perform single cell transmission.
  • a secondary cell such as AP3
  • FIG. 7a shows a format of cooperative (collaborative) transmission response information, which first includes a traditional short training field (Legacy Short Training Field). , referred to as L-STF), Legacy Long Training Field (L-LTF for short), Legacy Signal Field (L-SIG) for ensuring backward compatibility, and Indicates the length of the data.
  • L-STF traditional short training field
  • L-LTF Legacy Long Training Field
  • L-SIG Legacy Signal Field
  • the preamble further includes a Next Generation Signaling A/B (hereinafter referred to as NG-SIG-A/B) for carrying signaling information for the NG standard, where NG indicates a code number, and On behalf of Next Generation, of course, other codes can also be used.
  • NG-STF Next Generation Short Training Field
  • NG-LTF Next Generation Long Training Field
  • MIMO Multiple input and multiple output
  • AGC Automatic Gain Control
  • the NG-LTF field may contain multiple NG-LTF symbols for performing channel measurement on multiple space-time streams.
  • a Data field portion for carrying the MAC frame, wherein the data field indicates that AP2 wishes to perform cooperative transmission.
  • the interference test information may be sent or sent separately with the response information that is determined to be cooperatively transmitted, and the frame structure sent together may be sent together by using a data packet structure as shown in FIG. 7b.
  • the frame structure may also adopt a data packet structure as shown in FIG. 7c, wherein a padding field is further disposed between the interference test information and the data field; and the case of separately transmitting may be as shown in FIG. 7d, the interference test information and the The response information frames are separated by a short frame spacing. In both cases, whether the interference test information exists after the data field may be indicated by a bit indication of the signaling field of the response information.
  • the cooperative transmission request sent by the AP1 may also indicate whether the data packet of the response information that the AP2 wants to transmit carries the interference test information.
  • the interference test information may be an interference test sequence, and some existing sequences in the 802.11 standard, such as a Legacy Long Training Field (L-LTF), may be used for a long throughput training sequence (High Throughput LTF (abbreviated as HT-LTF), very high image rate training sequence (Very HT LTF, referred to as VHT-LTF), high efficiency long training sequence (High Efficient LTF, referred to as HE-LTF), can also be Random sequence.
  • L-LTF High Throughput LTF
  • VHT-LTF very high image rate training sequence
  • HE-LTF high efficiency long training sequence
  • HE-LTF high Efficient LTF
  • the interference test information may be transmitted by using a precoding matrix Q 2 that prevents interference on the received data of the AP1.
  • Inter-channel estimation information the application is not limited thereto. Or taking into account the situation of the receiving end in the cell of AP2, using other precoding matrix for transmission.
  • the AP1 performs interference test according to the received interference test information, and determines that the AP2 does not perform coordinated transmission with the AP2.
  • the AP1 may determine, according to the data field of the response information, whether the AP2 is to perform cooperative transmission. Optionally, whether the interference test information exists after the data field is determined according to the corresponding bit indication.
  • the AP1 tests whether the interference of the AP2 exceeds a predetermined threshold by using the interference test information. If the threshold is exceeded, the AP2 may choose not to perform coordinated transmission with the AP2. Optionally, the interference equal to the threshold may also be selected not to perform cooperative transmission with the AP2.
  • the information may be carried in a separate cooperation confirmation frame and sent to the AP2, or carried in an omni-directional transmission of the uplink transmission trigger frame for the STA1.
  • the information may be a corresponding bit indication in the frame, such as a 1-bit indication. The value is 0 or 1.
  • the information may also be a corresponding identifier, such as a reserved identifier or an identifier of an AP in which a non-peripheral cell exists, indicating that AP1 does not wish to perform coordinated transmission.
  • the AP1 performs an interference test according to the received interference test information to determine cooperative transmission with the AP2.
  • the AP1 may determine, according to the data field of the response information, whether the AP2 is to perform cooperative transmission. Optionally, whether the interference test information exists after the data field is determined according to the corresponding bit indication.
  • the AP1 tests whether the interference of the AP2 exceeds a predetermined threshold by using the interference test information. If the threshold is not exceeded, the AP2 may perform coordinated transmission with the AP2. Optionally, if the interference is equal to the predetermined threshold, the coordinated transmission with the AP2 may also be selected.
  • the information may be carried in a separate cooperation confirmation frame and sent to the AP2, or carried in an omni-directional transmission of the uplink transmission trigger frame for the STA1.
  • the information may be a corresponding bit indication in the frame, such as a 1-bit indication. If the value is 0 or 1, the information may also be a corresponding identifier, such as the identifier of AP2, indicating that AP1 wants to perform coordinated transmission.
  • AP1 sends an uplink data transmission trigger frame to STA1 to be scheduled, and STA1 performs uplink data transmission after receiving the trigger frame. . If AP1 feeds back through the trigger frame, whether or not the coordinated transmission is selected, STA1 performs uplink data transmission after receiving the trigger frame.
  • AP2 is the cooperative acknowledgment frame is received or after said trigger frame to STA2 transmits downlink data to be scheduled (S105 interference if the test information is transmitted as Q 2 through a specific precoding matrix, Then, the downlink data is also transmitted by using Q 2 to perform coordinated transmission with AP1.
  • the cooperative transmission of the AP2 and the AP1 has the same end time or the downlink transmission end time of the AP2 is earlier than the uplink transmission end time of the AP1, and the time information of the uplink transmission of the AP1 can be carried by any of the foregoing messages or frames.
  • steps S103 and S104 and S105 have no necessary sequence, which is only different processing for different situations.
  • steps S106 and S107 and S108 and S109 have no inevitable sequence, which is only different processing for different situations.
  • a method for cooperative transmission control in the embodiment of the present application determines whether to perform coordinated transmission by using a dual decision condition of parameter sharing and interference test between cells, so that the access point can know the interference situation in advance and prevent the actual coordinated transmission. Interference, resulting in unnecessary retransmissions, improves communication efficiency.
  • FIG. 4 is a flow chart of a second embodiment of a method for cooperative transmission control provided by the present application.
  • the difference between this embodiment and the first embodiment is that the embodiment determines the case of cooperative transmission for the AP2, and specifically distinguishes the transmission control flow that the AP2 needs to perform cooperative transmission under different conditions, and the same or similar content as the first embodiment This embodiment will not be described again.
  • the method includes:
  • S201 The cooperative transmission request sent by the AP1, and the AP2 receives the coordinated transmission request sent by the AP1, where the negotiation parameter information is carried.
  • the information of carrying the negotiation parameters mainly includes: the number of antennas of AP1 and the number of spatial streams of cell 1. This step is similar to S101 in the first embodiment. For details, refer to S101, and details are not described herein again.
  • AP2 can determine whether it can cooperate with AP1 for transmission according to its own number of antennas. If the number of the spatial streams is less than or equal to the number of antennas of the AP1, and the number of antennas of the AP2 is greater than the number of antennas of the AP1, the AP2 can unilaterally pass the spatial reservation direction to prevent interference on the uplink data received by the AP1, and can perform cooperative transmission.
  • the precoding matrix Q 2 that prevents interference with the received data of the AP1 can be selected for data transmission.
  • the AP2 sends, to the AP1, response information that is determined to be cooperatively transmitted.
  • This step is an optional step, and the interference test information sent in step S204 may be used to indicate that AP2 determines to perform cooperative transmission.
  • the information format of the response information may adopt a data packet structure as shown in FIG. 7a, wherein the data field indicates that AP2 wishes to perform cooperative transmission.
  • the AP2 sends interference test information to the AP1.
  • the interference test information may be sent together with the response information that is determined to be cooperatively transmitted (the specific information format may be referred to FIG. 7b or FIG. 7c) or separately. (For details, refer to FIG. 7d.
  • the interference test information can be transmitted using the precoding matrix Q 2 .
  • AP2 matrix receiving the equalization matrix W 1 Q 'AP1 and receiving data according to the parameter information negotiated, for determining the coordinated transmission by a double AP1 beamforming aspect, AP2 and determines precoding transmission data.
  • the AP2 can determine whether it can perform cooperative transmission with the AP1 according to the number of its own antennas. If the number of the spatial streams is smaller than the number of antennas of the AP1, and the number of antennas of the AP2 is less than or equal to the number of antennas of the AP1, the spatial reservation direction can be prevented to interfere with the uplink data received by the AP1, and cooperative transmission can be performed.
  • the AP2 In addition to determining the precoding matrix Q 2 ' of the own transmitting end, the AP2 must determine that the AP1 uses a certain receiving equalization matrix to receive data, that is, the AP2 uses the sending. End beamforming, AP1 uses receiver beamforming.
  • the response message format can be employed in a packet structure as shown in FIG. 7e, wherein the data field, except for carrying AP2 whether coordinated transmission collaboration response message further carries information of the equalization matrix W AP1 receives reception data 1 used.
  • the AP2 sends interference test information to the AP1.
  • the interference test information may be sent or transmitted separately with the response information that is determined to be cooperatively transmitted. Transmission may be employed together in the manner shown in FIG. 7F, similar to FIG. 7C, padding to the data field and the interference between the test information set, this field is used to prepare AP1 using received data fields carried equalization matrix W 1 using a pair of AP2 Q 2 'The interference test information sent; the separate transmission can be in the manner shown in Figure 7g.
  • S202-S204 and S205-S207 have no necessary sequence, which is only different processing for different situations.
  • the AP1 performs an interference test according to the received interference test information, and determines that the AP2 does not perform coordinated transmission with the AP2.
  • the AP1 AP2 test exceeds a predetermined threshold value, for the case of S202-S204, it is desirable, after the transmission of data Q 2, will not cause interference to AP1, AP2 but if the acquired Q 2 Not accurate enough, or considering that the receiver in the cell adopts other precoding matrices, interference may occur. If the threshold is exceeded, the AP2 may not choose to perform coordinated transmission with the AP2. If the threshold is not exceeded, the AP2 may perform coordinated transmission with the AP2. Optionally, the interference equal to the threshold may be selected not to perform coordinated transmission with the AP2, or may be selected to perform cooperative transmission with the AP2.
  • the data transmitted by Q 2 ' when AP1 receives with W 1 , will not cause interference to AP1, but if Q 2 ' or W 1 acquired by AP 2 is not accurate enough, or considering the receiving end within a cell taken other pre-coding matrix, the reception AP1 considered STA1 transmitting data, using the W 1 may not be received, the interference may occur. If the threshold is exceeded, the AP2 may not choose to perform coordinated transmission with the AP2. If the threshold is not exceeded, the AP2 may perform coordinated transmission with the AP2. Optionally, the interference equal to the threshold may be selected not to perform coordinated transmission with the AP2, or may be selected to perform cooperative transmission with the AP2.
  • This step is similar to S107 in the first embodiment.
  • S107 For details, refer to S107, and details are not described herein again.
  • the AP1 performs interference test according to the received interference test information to determine cooperative transmission with the AP2.
  • the AP1 tests whether the interference of the AP2 exceeds a predetermined threshold by using the interference test information. If the threshold is not exceeded, the AP2 may perform coordinated transmission with the AP2. Optionally, the interference equal to the threshold may be selected for cooperative transmission with the AP2.
  • AP1 is selected cooperative transmission, for the case of a unilateral beamforming, AP2 cooperative acknowledgment frame is received or the rear of the trigger frame, Q 2 using the STA2 transmits downlink data to be scheduled, the AP1 performs cooperative transmission ; for the case of beamforming both ways, AP2 cooperative acknowledgment frame is received or the rear of the trigger frame, using the Q 2 'STA2 transmits downlink data to be scheduled, AP1 using the W 1 STA1 transmits reception schedule Upstream data.
  • the cooperative transmission of the AP2 and the AP1 has the same end time or the downlink transmission end time of the AP2 is earlier than the uplink transmission end time of the AP1, and the time information of the uplink transmission of the AP1 can be carried by any of the foregoing messages or frames.
  • This step is similar to S109 in the first embodiment.
  • S109 For other detailed descriptions, refer to S109, and details are not described herein again.
  • steps S208 and S209 and S210 and S211 have no necessary sequence, which is only different processing for different situations.
  • a method for cooperative transmission control determines a beamforming manner to avoid interference by different conditions for a cell configuration parameter, and combines the double decision condition of the interference test to determine whether to perform coordinated transmission, so that beamforming can be performed.
  • the space control mode prevents interference when actually performing cooperative transmission, causes unnecessary retransmission, and improves communication efficiency.
  • FIG. 5 is a flowchart of a first embodiment of another method for cooperative transmission control provided by the present application, where the primary access point AP1 is to be downlinked and from the access point AP2.
  • the scenario to be transmitted in the uplink is described as an example.
  • the site to be scheduled by AP1 is STA1
  • the site corresponding to AP2 is STA2.
  • the present embodiment and the subsequent embodiments are generally described from the perspective of interaction, but the steps of the interaction sides in the system must not be performed together.
  • the technical solution proposed by the present application Improvements are made on each side of the system. The explanations and details of the same contents as those of the foregoing embodiments are not disclosed and described herein.
  • the method includes:
  • S301 A cooperative transmission request sent by the AP1, the AP2 receives a coordinated transmission request sent by the AP1, where the coordinated transmission request carries the negotiation parameter information;
  • an AP After an AP obtains the channel usage right, or after it is elected in the system, it is determined to be the primary AP (ie, AP1), and other APs in the system are secondary APs (for example, AP2, AP3, ). The data transmission of AP1 and the scheduling of AP1 corresponding station STA1 are guaranteed.
  • the AP1 determines that STA1 is scheduled to perform downlink transmission, and transmits a coordinated transmission request to at least one secondary AP (such as AP2).
  • the information format of the coordinated transmission request may be an action frame.
  • the frame structure may be specifically related to FIG.
  • AP1 antenna number may carry negotiation parameter information, optionally including at least one of the following: AP1 antenna number, AP1
  • the number of the spatial stream of the cell 1 and the basic service set color (Basic Service Set Color, BSS Color for short) are used to identify the cell and the sending address (that is, the address of the AP1) served by the AP1, and the uplink and downlink indications are used to indicate whether the AP1 is uplink or downlink.
  • the downlink the receiving address
  • the above parameter information does not constitute a limitation on the present application, and may include, for example, transmission power, modulation and coding information, and the like.
  • the AP2 determines, according to the negotiation parameter information, whether to perform coordinated transmission with the AP1.
  • the AP2 may determine whether to perform coordinated transmission with the AP1. For example, the AP2 may determine whether the AP1 can perform cooperative transmission according to the number of the spatial streams and the number of antennas of the AP1 according to the number of antennas.
  • the AP2 cannot prevent interference with the uplink data received by the AP1 through the spatial reservation direction, and cannot perform cooperative transmission;
  • the number of spatial streams is less than or equal to the number of antennas of AP1, and the number of antennas of AP2 is greater than the number of antennas of AP1, or if the number of spatial streams is smaller than the number of antennas of AP1, and the number of antennas of AP2 is less than or equal to the number of antennas of AP1, AP2
  • the spatial reservation direction can be used to prevent the AP1 from receiving the uplink data, and the coordinated transmission can be performed.
  • the foregoing is only an example of the present application.
  • the AP2 determines whether to cooperate with the AP1, and is not limited to this manner.
  • the step is an optional step.
  • the AP2 determines that the AP1 does not perform coordinated transmission with the AP1, the information that cannot be cooperatively transmitted may be fed back to the AP1 by using the step.
  • the AP2 is configured.
  • the cooperative transmission request may not be replied within a preset time to enable the AP1 to determine that the AP2 cannot perform cooperative transmission, and the operation of the step is not required.
  • AP1 may continue to select a secondary cell (such as AP3) of other cells for cooperative transmission, or perform single cell transmission.
  • a secondary cell such as AP3
  • the AP2 determines that the AP1 is to perform coordinated transmission with the AP1, it sends the response information to the AP1 to determine the coordinated transmission.
  • the information may be in the existing information format, as shown in Figure 7a. The related description in Embodiment 1 is not described here, wherein the data field indicates that AP2 wishes to perform coordinated transmission.
  • S305 AP1 sends interference test information, and AP2 receives interference test information.
  • AP1 can separately send interference test information to AP2, and the other can also use the downlink data packet sent to STA1 as interference test information.
  • AP1 sends a separate downlink data packet to STA1 in advance to test interference before sending a downlink data packet to STA1.
  • the second is to use AP1 to formally contact STA1.
  • the transmitted downlink packet is used to test the interference.
  • the data packet can be an existing information format, as shown in Figures b and g, where the NG-STF and NG-LTF portions can be used as test sequences.
  • the AP2 may receive the receiving equalization matrix W 2 that prevents the AP1 from interfering with the received data, or adopt other receiving equalization matrices for reception according to the situation of the transmitting end in the cell of the AP2.
  • S306 and AP2 perform interference test according to the interference test information, and determine that the cooperative transmission is not performed with the AP1.
  • the AP2 tests whether the interference of the AP1 exceeds a predetermined threshold by using the interference test information. If the threshold is exceeded, the AP1 may choose not to perform coordinated transmission with the AP1. Then, AP2 does not schedule its corresponding STA2, and does not schedule STA2 for uplink data transmission. The downlink data transmission of AP1 to STA1 is guaranteed. Therefore, regardless of whether AP2 participates in cooperative transmission, the downlink data transmission of AP1 is not affected as usual. Optionally, the case where the interference is equal to the threshold may also be determined not to perform cooperative transmission with the AP1.
  • S307 and AP2 perform interference test according to the interference test information, and determine to perform cooperative transmission with AP1.
  • the AP2 tests whether the interference of the AP1 exceeds a predetermined threshold by using the interference test information. If the threshold is not exceeded, the AP1 may perform coordinated transmission with the AP1. Optionally, the interference is equal to the threshold value, and the coordinated transmission with the AP1 may also be determined.
  • STA2 is scheduled to perform uplink data transmission, and AP2 can send a trigger frame to STA2 to schedule STA2 for uplink data transmission.
  • the format of the interference test information sent by the AP1 in the S305 is different.
  • the format in which the AP2 sends the trigger frame and the scheduled STA2 performs the uplink data transmission is different.
  • the AP1 sends the interference test information to the AP2 separately, or the AP1 sends a separate downlink data packet to the STA1 to test the interference in advance.
  • the transmission of the trigger frame is The data field in the downlink data packet of the next frame that is officially sent to STA1 by AP1 is started before the end of the transmission of the data field in the next frame, and may be started simultaneously with the downlink data packet transmission of the next frame, or may be arbitrarily in the process of downlink data packet transmission of the next frame.
  • the time start is started, but the uplink data transmission of the scheduled second STA needs to end before the end of the transmission of the data field in the downlink data packet of the next frame, or the data in the downlink data packet of the next frame
  • the transmission of the field ends at the same time
  • the interference is tested against the downlink data packet sent by STA1 to STA1.
  • the corresponding training field can be used as the test sequence, such as the Next Generation Short Training Field (NG-STF) and the next generation.
  • the section of the Next Generation Long Training Field (NG-LTF) can be used as the test sequence.
  • the transmission of the trigger frame is in the downlink data packet. The transmission is initiated during transmission, and the scheduled uplink data transmission of the second STA ends before the end of the transmission of the data field in the downlink data packet, or ends simultaneously with the transmission of the data field in the downlink data packet.
  • steps S303 and S304 and S305 have no necessary sequence, which is only different processing for different situations.
  • steps S306 and S307 and S308 have no necessary sequence, which is only different processing for different situations.
  • a method for cooperative transmission control in the embodiment of the present application determines whether to perform coordinated transmission by using a dual decision condition of parameter sharing and interference test between cells, so that the access point can know the interference situation in advance and prevent the actual coordinated transmission. Interference, resulting in unnecessary retransmissions, improves communication efficiency.
  • FIG. 6 is a flowchart of a second embodiment of another method for cooperative transmission control provided by the present application.
  • the difference between this embodiment and the third embodiment is that the embodiment determines the case of cooperative transmission for the AP2, and specifically distinguishes the transmission control flow that the AP2 needs to perform cooperative transmission under different conditions, and the same or similar content as the third embodiment is This embodiment will not be described again.
  • the method includes:
  • S401 A cooperative transmission request sent by the AP1, the AP2 receives a coordinated transmission request sent by the AP1, where the coordinated transmission request carries the negotiation parameter information;
  • the information of carrying the negotiation parameters mainly includes: the number of antennas of AP1 and the number of spatial streams of cell 1. This step is similar to S301 in the third embodiment. For details, refer to S301, and details are not described herein again.
  • AP2 the negotiation based on the parameter information determined by unilateral beamforming cooperative transmission with the AP1, and determines whether the received equalization matrix W 2.
  • the AP2 can determine whether it can perform cooperative transmission with the AP1 according to the number of its own antennas. If the number of the spatial streams is less than or equal to the number of antennas of the AP1, and the number of antennas of the AP2 is greater than the number of antennas of the AP1, the AP2 may perform receiving beamforming on the data received by the AP1 to prevent the AP1 from interfering with receiving uplink data. Collaborative transfer is possible.
  • the AP 2 may receive the receiving equalization matrix W 2 that prevents the AP1 from interfering with the received data.
  • Channel estimation information the application is not limited thereto.
  • AP2 determines to perform coordinated transmission with the AP1, the AP2 sends, to the AP1, response information that is determined to be cooperatively transmitted.
  • AP2 determines that it wants to perform coordinated transmission with AP1, it sends the response information that is determined to be coordinated transmission to AP1, and can be sent through the cooperative transmission response frame.
  • the information format can be in the existing information format, as shown in Figure 7a. The foregoing embodiment is not described herein again, wherein the data field indicates that AP2 wishes to perform coordinated transmission.
  • the AP2 can determine whether it can perform cooperative transmission with the AP1 according to the number of its own antennas. If the number of spatial streams is smaller than the number of antennas of the AP1, and the number of antennas of the AP2 is less than or equal to the number of antennas of the AP1, the spatial reservation direction may be used to prevent the AP1 from interfering with the uplink data received by the spatial reservation direction, and the coordinated transmission may be performed.
  • the receiving equalization matrix W 2 ' of the received data AP2 must also determine that AP1 uses some precoding matrix Q 1 to transmit data, that is, AP1 adopts transmitting beamforming, and AP2 adopts receiving beamforming.
  • the AP2 determines that the AP1 is to perform cooperative transmission with the AP1, it sends the response information that is determined to be cooperatively transmitted to the AP1, and may be sent through the cooperative transmission response frame, and the information format may adopt an existing information format, as shown in FIG. 7h, where the data field is In addition to the cooperative response information carrying whether the AP2 is to be cooperatively transmitted, the indication information of the precoding matrix Q 1 used by the AP1 to transmit data is carried.
  • S406 AP1 sends interference test information, and AP2 receives interference test information.
  • AP1 can separately send interference test information to AP2, and the other can also use the downlink data packet sent to STA1 as interference test information.
  • AP1 sends a separate downlink data packet to STA1 in advance to test interference before sending a downlink data packet to STA1.
  • the second is to use AP1 to formally contact STA1.
  • the transmitted downlink packet is used to test the interference.
  • the data packet can be an existing information format, as shown in Figures b and g, where the NG-STF and NG-LTF portions can be used as test sequences.
  • AP2 may receive the receiving equalization matrix that prevents AP1 from interfering with its received data, or adopt other receiving equalization matrix for receiving in consideration of the situation of the transmitting end in the cell of AP2.
  • S407 and AP2 perform interference test according to the interference test information, and determine that the cooperative transmission is not performed with AP1.
  • AP2 AP1 test test information exceeds a predetermined threshold value (optional, may be equal to the threshold), for the case of unilateral beamforming, ideally, when using W 2 for AP2 receives, AP1 It will not cause interference, but if the W 2 obtained by AP2 is not accurate enough, or other receiving equalization matrix is taken in consideration of the transmitting end in the cell, interference may occur.
  • a predetermined threshold value (optional, may be equal to the threshold)
  • AP1 when using Q 1 transmits AP1, AP2 using W 2 'when receiving, AP1 thereof will not interfere, but if Q 1 of AP2 acquires or W 2' is not enough Accurate, or AP1 takes into account the receiver in the cell, adopts other precoding matrix, or AP2 adopts other receiving equalization matrix, which may cause interference.
  • AP2 may choose not to perform cooperative transmission with the AP1. Then, AP2 does not schedule its corresponding STA2, and does not schedule STA2 for uplink data transmission. The downlink data transmission of AP1 to STA1 is guaranteed. Therefore, regardless of whether AP2 participates in cooperative transmission, the downlink data transmission of AP1 is not affected as usual.
  • S408 and AP2 perform interference test according to the interference test information, and determine to perform cooperative transmission with the AP1.
  • the AP2 tests whether the interference of the AP1 exceeds a predetermined threshold by using the interference test information. If the threshold is not exceeded, the AP1 may perform coordinated transmission with the AP1. Optionally, if the interference is equal to the predetermined threshold, the cooperative transmission with the AP1 may also be determined.
  • the STA2 is scheduled to perform uplink data transmission.
  • the scheduling STA2 performs uplink data transmission, and the AP2 sends a trigger frame to the STA2 to schedule the STA2 to perform uplink data transmission.
  • the format of the AP1 transmitting interference test information in S406 is different.
  • the form in which AP2 sends the trigger frame and schedules STA2 to perform uplink data transmission is also different:
  • the AP1 sends the interference test information to the AP2 separately, or the AP1 sends a separate downlink data packet to the STA1 to test the interference.
  • the AP2 scheduling timing diagram shown in Figure 8a shows the transmission of the trigger frame.
  • the transmission of the data field in the downlink data packet of the next frame is performed before the end of the transmission of the data field in the downlink data packet of the next frame that is officially sent to the STA1, and the transmission of the data field in the downlink data packet of the next frame. End before ending, or end with the transmission of the data field in the downlink data packet of the next frame;
  • the interference is tested for the downlink data packet sent by the STA1 to the STA1, and the NG-STF and the NG-LTF part can be used as the test sequence, as shown in the AP2 scheduling timing diagram shown in FIG. 8b, where the trigger frame is The transmission is initiated during the transmission of the downlink data packet, and the uplink data transmission of the scheduled second STA ends before the end of the transmission of the data field in the downlink data packet, or the transmission of the data field in the downlink data packet At the same time.
  • steps S402 and S403 and S404 and S405 have no necessary sequence, which is only different processing for different situations.
  • S407 and S408 and S409 have no necessary sequence, which is only different processing for different situations.
  • a method for cooperative transmission control determines a beamforming manner to avoid interference by different conditions for a cell configuration parameter, and combines the double decision condition of the interference test to determine whether to perform coordinated transmission, so that beamforming can be performed.
  • the space control mode prevents interference when actually performing cooperative transmission, causes unnecessary retransmission, and improves communication efficiency.
  • the above methods are all described by the AP. It can be understood that, in some scenarios, the STAs of the station may also be equivalent to the primary AP or the secondary AP, and implement the foregoing method embodiments.
  • FIG. 9 is a schematic structural diagram of a device for simplified cooperative transmission control provided by the present application.
  • the corresponding functional modules are included: a transceiver unit 901 and a processing unit 902.
  • AP2 the related function of the slave AP
  • AP1 the related function of the primary AP
  • the transceiver unit 901 is configured to implement the related functions of the AP1/AP2 to send and receive information or data.
  • the processing unit 902 is configured to implement the related functions of the AP1/AP2 processing information or data, and the following describes the implementation of the related network device. No longer. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner. The following is an example of dividing each functional module by using corresponding functions.
  • the embodiment of the present application further provides a network device.
  • the network device can be used as a cooperative transmission control device on the AP side of the access point for performing the steps performed by AP1 or AP2 in any of the Figures 2 and 4 to 6. It should be noted that the network device may also be a station STA having the above method equivalent to AP1 or AP2.
  • Figure 10 shows a simplified schematic diagram of the structure of a network device.
  • Network device 100 includes a 1001 portion and a 1002 portion.
  • the 1001 part is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals; the 1002 part is mainly used for baseband processing, and controls the network device 100.
  • the 1001 portion may be generally referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver.
  • the 1002 portion is typically the control center of the network device 100, and may be generally referred to as a processing unit, control unit, processor, or controller, etc., for controlling the network device 100 to perform the steps performed by the AP1 or AP2 in the above-described related embodiments.
  • a processing unit control unit, processor, or controller, etc.
  • the transceiver unit of the 1001 part which may also be called a transceiver, or a transceiver, etc., includes an antenna and a radio frequency unit, wherein the radio frequency unit is mainly used for radio frequency processing.
  • the device for implementing the receiving function in the 1001 portion may be regarded as a receiving unit
  • the device for implementing the transmitting function may be regarded as a transmitting unit, that is, the 1001 portion includes a receiving unit and a transmitting unit.
  • the receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit, etc.
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit or the like.
  • the 1002 portion may include one or more boards, each of which may include one or more processors and one or more memories for reading and executing programs in the memory to implement baseband processing functions and network devices 100 controls. If multiple boards exist, the boards can be interconnected to increase processing power. As an optional implementation manner, multiple boards share one or more processors, or multiple boards share one or more memories, or multiple boards share one or more processes at the same time. Device.
  • the memory and the processor may be integrated or independently.
  • the 1001 portion and the 1002 portion may be integrated or may be independently arranged.
  • all the functions in the 1002 part can be implemented in one chip, and some functions can be integrated in one chip, and another part of the functions are integrated in one or more other chips, which is not limited in this application.
  • the network device acts as a related function device in the primary access point AP1 or AP1, when performing the steps performed by AP1:
  • the transceiving unit can be used to perform the steps performed by AP1 in S101, S103, S104, S105, S107, and/or S109 of FIG. 2, and/or other steps in the present application.
  • the processing unit can be used to perform S106 and/or S108 of Figure 2, and/or perform other steps in this application.
  • the transceiving unit can be used to perform the steps performed by AP1 in S201, S203, S204, S206, S207, S209, and/or S211 of FIG. 4, and/or other steps in the present application.
  • the processing unit can be used to perform S208 and/or S210 of Figure 4, and/or perform other steps in the present application.
  • the transceiving unit can be used to perform the steps performed by AP1 in S301, S303, S304, and/or S305 of FIG. 5, and/or other steps in the present application.
  • the processing unit can be used to perform other steps in this application.
  • the transceiving unit can be used to perform the steps performed by AP1 in S401, S403, S405, and/or S406 of FIG. 6, and/or other steps in the present application.
  • the processing unit can be used to perform other steps in this application.
  • the network device acts as a related function device from the access point AP2 or AP2, when performing the steps performed by the AP2:
  • the transceiver unit can be configured to perform S101, S103, S104, S105, S107, and/or S109 of FIG.
  • the steps performed by AP2, and/or other steps in this application can be used to perform S102 of Figure 2, and/or perform other steps in the application.
  • the transceiving unit can be used to perform the steps performed by AP2 in S201, S203, S204, S206, S207, S209, and/or S211 of FIG. 4, and/or other steps in the present application.
  • the processing unit can be used to perform S202 and/or S205 of Figure 4, and/or perform other steps in this application.
  • the transceiving unit can be used to perform the steps performed by AP2 in S301, S303, S304, S305, and/or S308 of FIG. 5, and/or other steps in the present application.
  • the processing unit can be used to perform S306 and/or S307 of Figure 5, and/or perform other steps in this application.
  • the transceiving unit can be used to perform the steps performed by AP2 in S401, S403, S405, S406, and/or S409 of FIG. 6, and/or other steps in the present application.
  • the processing unit can be used to perform S407 and/or S408 of Figure 6, and/or perform other steps in the present application.
  • the device on the primary AP side may be an access node AP or a STA having a corresponding access function, for example, an access device or a site device, or a chip or function in the device.
  • the module can be implemented by software, hardware, or by executing corresponding software through hardware.
  • the specific implementation of the device from the AP side may be an access node AP or a STA having a corresponding access function, for example, an access device or a site device, or a chip or function in the device.
  • the module can be implemented by software, hardware, or by executing corresponding software through hardware.
  • the present application further provides a system for cooperative transmission control, including the device on the primary AP side in the above embodiment (which may also be a STA device that implements the function of the primary AP side), and the AP-side device (which may also implement the above). Site STA device functioning from the AP side).
  • the application also provides a computer program product that, when run on a computer, causes the computer to perform any of the methods provided above.
  • the present application also provides a chip in which instructions are stored, which, when run on each of the above-described devices, cause each device to perform the method provided above.
  • the application also provides a computer storage medium having stored thereon a computer program (instructions) that, when executed on a computer, cause the computer to perform the method of any of the above aspects.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • a software program it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server or data center via wired (eg coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device that includes one or more servers, data centers, etc. that can be integrated with the media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)) or the like.
  • a magnetic medium eg, a floppy disk, a hard disk, a magnetic tape
  • an optical medium eg, a DVD
  • a semiconductor medium such as a solid state disk (SSD)

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Abstract

本申请实施例公开了一种协作传输控制的方法、装置及系统。其中，主接入点和从接入点之间通过小区间配置参数共享和干扰测试的双重判决条件来决定是否进行协作传输，并进一步针对小区配置参数的情况不同确定避免干扰的波束成形方式，并结合干扰测试的双重判决条件来决定是否进行协作传输，使得接入点能提前获知干扰情况，防止实际进行协作传输时产生干扰，造成不必要的重传，提高了通信效率。

Description

一种协作传输控制的方法、装置及系统
本申请要求于2018年1月19日提交中国国家知识产权局、申请号为201810054522.8、发明名称为“一种协作传输控制的方法、装置及系统”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
本申请涉及通信技术领域，尤其涉及通信系统中的协作传输控制的技术。
背景技术
随着无线网络的发展以及无线局域网(Wireless Local Area Network，简称为WLAN)技术的不断普及，WLAN设备变得越来越密集。由于无线接入点(Access Point，简称为AP)易于部署，越来越密集的AP也带来了更多的小区间的干扰。如何通过AP之间协作传输的控制来防止用户间或小区间的干扰，提升对用户的服务质量，是需要考虑的问题。
发明内容
本申请提供一种协作传输控制的方法、装置及系统，用以实现多AP之间协作传输，防止干扰。
第一方面，提供一种协作传输控制的方法和装置。
在一种可能的设计中，该方法应用于从接入点AP上，也可以是相当于从AP的站点STA上。该方法包括：从接入点AP接收主AP发送的协作传输请求，所述协作传输请求携带协商参数信息；当所述从AP根据所述协商参数信息欲与所述主AP协作传输时，所述从AP向所述主AP发送干扰测试信息，并接收主AP根据所述干扰测试信息发送的指示是否进行协作传输的决定信息。可以理解的，该设计中，主AP可以待调度小区内的站点STA进行上行传输，从AP可以待调度小区内的站点STA进行下行传输，但不限于此。
在该设计中，通过小区间配置参数共享和干扰测试的双重判决条件来决定是否进行协作传输，使得接入点能提前获知干扰情况，防止实际进行协作传输时产生干扰，造成不必要的重传，提高了通信效率。
在一种可能的设计中，当所述从AP根据所述协商参数信息不欲与所述主AP协作传输时，所述从AP在预设时间内不对所述主AP进行反馈，或向所述主AP发送第一响应信息，用于指示所述从AP无法进行协作传输。
在一种可能的设计中，当所述从AP欲与所述主AP协作传输时，所述从AP向所述主AP发送第二响应信息，用于指示所述从AP希望进行协作传输；可以理解，所述第二响应信息与所述干扰测试信息一起发送，或分开送。
在一种可能的设计中，所述协作传输请求携带第一指示信息，所述第一指示信息用于指示所述干扰测试信息是否与所述第二响应信息一起发送。
在一种可能的设计中，所述决定信息携带在协作确认帧中或携带在发给待调度的站点STA的上行传输触发帧中。
在一种可能的设计中，所述协商参数信息包括以下至少一项：主AP的天线 数、主AP对应小区的空间流数。
在一种可能的设计中，所述从AP向所述主AP发送干扰测试信息，包括：若所述空间流数小于等于主AP的天线数，且从AP的天线数大于主AP的天线数，则所述从AP采用第一预编码矩阵Q 2向所述主AP发送所述干扰测试信息，所述Q 2为所述从AP根据预设第一标准确定的避免对主AP接收数据产生干扰的预编码矩阵；或，若所述空间流数小于主AP的天线数，且从AP的天线数小于等于主AP的天线数，则所述从AP向所述主AP发送第二指示信息，用于指示所述主AP接收数据的接收均衡矩阵W 1，并采用第二预编码矩阵Q 2’发送所述干扰测试信息，所述Q 2’和W 1分别为所述从AP根据预设第二标准确定的避免对主AP接收数据产生干扰的从AP发送数据的预编码矩阵和主AP接收数据的接收均衡矩阵。根据该设计，从AP可以通过针对小区配置参数的情况不同确定避免干扰的波束成形方式，有效避免干扰。
在一种可能的设计中，所述第一标准为H 21Q 2＝0，H 21为主AP和从AP间的信道估计信息；所述第二标准为W 1H 21Q 2’＝0，H 21为主AP和从AP间的信道估计信息。
相应的，提供一种协作传输控制的装置，该装置可以实现第一方面中的对应的方法。例如，该装置以功能形式限定，可以是接入节点AP或站点STA，例如：可以为接入设备或站点设备，也可以为这些设备中的芯片或功能模块，可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。
在一种可能的设计中，该装置可以包括处理器和存储器。该处理器被配置为支持该装置执行上述第一方面方法中相应的功能。存储器用于与处理器耦合，其保存该装置必要的程序(指令)和数据。另外该装置还可以包括通信接口，用于支持该装置与其他网元之间的通信。该通信接口可以是收发器。
在一种可能的设计中，该装置可以包括收发单元，其中，收发单元，用于接收主AP发送的协作传输请求，向所述主AP发送干扰测试信息，并接收主AP根据所述干扰测试信息发送的指示是否进行协作传输的决定信息。可选的，该装置还可以包括处理单元，该处理单元用于根据所述协商参数信息确定欲与所述主AP协作传输。
第二方面，提供一种协作传输控制的方法和装置。
在一种可能的设计中，该方法应用于主接入点AP上，也可以是相当于主AP的站点STA上。该方法包括：主接入点AP向至少一个从接入点AP发送协作传输请求，所述协作传输请求携带协商参数信息；当所述从AP根据所述协商参数信息欲与所述主AP协作传输时，所述主AP接收所述从AP发送的干扰测试信息；所述主AP根据所述干扰测试信息进行接收干扰测试确定干扰是否大于或大于等于预定门限值；根据确定结果，所述主AP向所述从AP发送决定信息指示所述从AP是否进行协作传输。可以理解的，该设计中，主AP可以待调度小区内的站点STA进行上行传输，从AP可以待调度小区内的站点STA进行下行传输，但不限于此。
在该设计中，通过小区间配置参数共享和干扰测试的双重判决条件来决定是否进行协作传输，使得接入点能提前获知干扰情况，防止实际进行协作传输时产生干扰，造成不必要的重传，提高了通信效率。
在一种可能的设计中，当所述从AP根据所述协商参数信息确定不与所述主 AP协作传输时，所述主AP在预设时间内接收不到所述从AP的反馈，或接收到所述从AP发送的第一响应信息，用于指示所述从AP无法进行协作传输。
在一种可能的设计中，当所述从AP欲与所述主AP协作传输时，所述主AP接收所述从AP发送的第二响应信息，用于指示所述从AP希望进行协作传输；可选的，所述第二响应信息与所述干扰测试信息一起发送，或分开送。
在一种可能的设计中，所述协作传输请求携带第一指示信息，所述第一指示信息用于指示所述干扰测试信息是否与所述第二响应信息一起发送。
在一种可能的设计中，所述决定信息携带在协作确认帧中或携带在待调度的站点STA上行传输的触发帧中。
在一种可能的设计中，所述协商参数信息包括以下至少一项：主AP的天线数、主AP对应小区的空间流数。
在一种可能的设计中，所述主AP接收所述从AP发送的干扰测试信息，包括：若所述空间流数小于等于主AP的天线数，且从AP的天线数大于主AP的天线数，则所述主AP接收所述从AP采用第一预编码矩阵Q 2发送的所述干扰测试信息，所述Q 2为所述从AP根据预设第一标准确定的避免对主AP接收数据产生干扰的预编码矩阵；或，若所述空间流数小于主AP的天线数，且从AP的天线数小于等于主AP的天线数，则所述主AP还接收所述从AP发送的第二指示信息，用于指示所述主AP接收数据的接收均衡矩阵W 1，并接收所述从AP采用第二预编码矩阵Q 2’发送的所述干扰测试信息，所述Q 2’和W 1分别为所述从AP根据预设第二标准确定的避免对主AP接收数据产生干扰的从AP发送数据的预编码矩阵和主AP接收数据的接收均衡矩阵。根据该设计，从AP可以通过针对小区配置参数的情况不同确定避免干扰的波束成形方式，有效避免干扰。
在一种可能的设计中，所述第一标准为H 21Q 2＝0，H 21为主AP和从AP间的信道估计信息；所述第二标准为W 1H 21Q 2’＝0，H 21为主AP和从AP间的信道估计信息。
相应的，提供一种协作传输控制的装置，该装置可以实现第二方面中的对应的方法。例如，该装置以功能形式限定，可以是接入节点AP或站点STA，例如：可以为接入设备或站点设备，也可以为这些设备中的芯片或功能模块，可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。
在一种可能的设计中，该装置可以包括处理器和存储器。该处理器被配置为支持该装置执行上述第二方面方法中相应的功能。存储器用于与处理器耦合，其保存该装置必要的程序(指令)和数据。另外该装置还可以包括通信接口，用于支持该装置与其他网元之间的通信。该通信接口可以是收发器。
在一种可能的设计中，该装置可以包括收发单元，其中，收发单元，用于向至少一个从AP发送协作传输请求，接收所述从AP发送的干扰测试信息，并向所述从AP发送发送决定信息指示所述从AP是否进行协作传输。可选的，该装置还可以包括处理单元，该处理单元用于根据所述干扰测试信息进行接收干扰测试确定干扰是否大于或大于等于预定门限值。
第三方面，提供一种协作传输控制的方法和装置。
在一种可能的设计中，该方法应用于从接入点AP上，也可以是相当于从AP的站点 STA上。
该方法包括：从接入点AP接收主AP发送的协作传输请求，所述协作传输请求携带协商参数信息；当所述从AP根据所述协商参数信息欲与所述主AP协作传输时，所述从AP向所述主AP发送第一响应信息用于指示所述从AP希望进行协作传输；所述从AP接收主AP发送的干扰测试信息；所述从AP根据所述干扰测试信息的干扰测试结果，确定是否进行协作传输。可以理解的，该设计中，主AP可以待调度小区内的站点STA进行下行传输，从AP可以待调度小区内的站点STA进行上行传输，但不限于此。
在该设计中，通过小区间配置参数共享和干扰测试的双重判决条件来决定是否进行协作传输，使得接入点能提前获知干扰情况，防止实际进行协作传输时产生干扰，造成不必要的重传，提高了通信效率。
在一种可能的设计中，当所述从AP根据所述协商参数信息确定不与所述主AP协作传输时，所述从AP在预设时间内不对所述主AP进行反馈，或向所述主AP发送第二响应信息，用于指示所述从AP无法进行协作传输。
在一种可能的设计中，所述从AP根据所述干扰测试信息的干扰测试结果，确定是否进行协作传输，包括：若干扰小于等于预定门限值，则所述从AP向待调度的第二站点STA发送触发帧，调度所述第二STA进行上行数据传输；若干扰大于预定门限值，则所述从AP不发送所述触发帧；或，若干扰小于预定门限值，则所述从AP向待调度的第二STA发送触发帧，调度所述第二STA进行上行数据传输；若干扰大于等于预定门限值，则所述从AP不发送所述触发帧。
在一种可能的设计中，所述干扰测试信息包括所述主AP发给待调度的第一STA的下行数据分组中相应的训练字段的信息；或，所述干扰测试信息为所述主AP给所述第一STA发送下行数据分组之前发送的单独数据分组中相应的字段的信息。
在一种可能的设计中，当所述干扰测试信息包括所述主AP发给所述第一STA的下行数据分组中相应的训练字段的信息时，所述触发帧的传输在所述下行数据分组的传输过程中启动，所述待调度的第二STA的上行数据传输在所述下行数据分组中的数据字段的传输结束之前结束，或者与所述下行数据分组中的数据字段的传输同时结束；或当所述干扰测试信息包括所述主AP发给所述第一STA的单独数据分组中相应的字段的信息时，所述触发帧的传输在所述主AP发给所述第一STA的下行数据分组中的数据字段的传输结束前启动，所述待调度的第二STA的上行数据传输在所述下行数据分组中的数据字段的传输结束之前结束，或者与所述下行数据分组中的数据字段的传输同时结束。
在一种可能的设计中，所述协商参数信息包括以下至少一项：主AP的天线数、主AP对应小区的空间流数。
在一种可能的设计中，所述从AP接收主AP发送的干扰测试信息，包括：所述从AP通过选定的避免主AP对其接收数据产生干扰的接收均衡矩阵接收主AP发送的干扰测试信息；其中，若所述空间流数小于等于主AP的天线数，且从AP的天线数大于主AP的天线数，则所述从AP根据第一标准选定第一接收均衡矩阵W 2；或，若所述空间流数小于主AP的天线数，且从AP的天线数小于等于主AP 的天线数，则所述从AP根据第二标准选定第二接收均衡矩阵W 2’和所述主AP发送数据的预编码矩阵Q 1；所述从AP接收主AP发送的干扰测试信息之前，还包括：所述从AP向所述主AP发送第一指示信息，用于指示所述主AP发送数据的预编码矩阵Q 1。根据该设计，从AP可以通过针对小区配置参数的情况不同确定避免干扰的波束成形方式，有效避免干扰。
在一种可能的设计中，所述第一标准为W 2H 21＝0，H 21为主AP和从AP间的信道估计信息；所述第二标准为W 2’H 21Q 1＝0，H 21为主AP和从AP间的信道估计信息。
相应的，提供一种协作传输控制的装置，该装置可以实现第三方面中的对应的方法。例如，该装置以功能形式限定，可以是接入节点AP或站点STA，例如：可以为接入设备或站点设备，也可以为这些设备中的芯片或功能模块，可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。
在一种可能的设计中，该装置可以包括处理器和存储器。该处理器被配置为支持该装置执行上述第三方面方法中相应的功能。存储器用于与处理器耦合，其保存该装置必要的程序(指令)和数据。另外该装置还可以包括通信接口，用于支持该装置与其他网元之间的通信。该通信接口可以是收发器。
在一种可能的设计中，该装置可以包括收发单元，其中，收发单元，用于接收主AP发送的协作传输请求，向所述主AP发送第一响应信息，并接收主AP发送的干扰测试信息。可选的，该装置还可以包括处理单元，该处理单元用于根据所述干扰测试信息的干扰测试结果确定是否进行协作传输。
第四方面，提供一种协作传输控制的方法和装置。
在一种可能的设计中，该方法应用于主接入点AP上，也可以是相当于主AP的站点STA上。该方法包括：主接入点AP向从AP发送协作传输请求，所述协作传输请求携带协商参数信息；当所述从AP根据所述协商参数信息欲与所述主AP协作传输时，所述主AP接收所述从AP发送的第一响应信息用于指示所述从AP希望进行协作传输；所述主AP向所述从AP发送干扰测试信息；所述干扰测试信息用于所述从AP进行干扰测试以确定是否进行协作传输。可以理解的，该设计中，主AP可以待调度小区内的站点STA进行下行传输，从AP可以待调度小区内的站点STA进行上行传输，但不限于此。
在该设计中，通过小区间配置参数共享和干扰测试的双重判决条件来决定是否进行协作传输，使得接入点能提前获知干扰情况，防止实际进行协作传输时产生干扰，造成不必要的重传，提高了通信效率。
在一种可能的设计中，当所述从AP根据所述协商参数信息确定不与所述主AP协作传输时，所述主AP在预设时间内接收不到所述从AP的反馈，或接收到所述从AP发送的第二响应信息，用于指示所述从AP无法进行协作传输。
在一种可能的设计中，所述方法还包括：所述主AP接收所述从AP发送的第一指示信息，所述第一指示信息用于指示所述主AP发送数据的预编码矩阵Q 1；所述干扰测试信息采用所述Q 1进行发送。根据该设计，从AP可以通过针对小区配置参数的情况不同确定避免干扰的波束成形方式，有效避免干扰。
在一种可能的设计中，所述干扰测试信息包括所述主AP发给待调度站点STA 的下行数据分组中相应的训练字段的信息；或，所述干扰测试信息为所述主AP给所述待调度站点STA发送下行数据分组之前发送的单独数据分组中相应的字段的信息。
在一种可能的设计中，所述协商参数信息包括以下至少一项：主AP的天线数、主AP对应小区的空间流数。
相应的，提供一种协作传输控制的装置，该装置可以实现第四方面中的对应的方法。例如，该装置以功能形式限定，可以是接入节点AP或站点STA，例如：可以为接入设备或站点设备，也可以为这些设备中的芯片或功能模块，可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。
在一种可能的设计中，该装置可以包括处理器和存储器。该处理器被配置为支持该装置执行上述第四方面方法中相应的功能。存储器用于与处理器耦合，其保存该装置必要的程序(指令)和数据。另外该装置还可以包括通信接口，用于支持该装置与其他网元之间的通信。该通信接口可以是收发器。
在一种可能的设计中，该装置可以包括收发单元，其中，收发单元，用于向从AP发送协作传输请求，接收所述从AP发送的第一响应信息，并向所述从AP发送干扰测试信息。可选的，该装置还可以包括处理单元，该处理单元用于确定待发送的信息，或处理接收的信息。
本申请还提供了一种计算机存储介质，其上储存有计算机程序(指令)，当该程序(指令)在计算机上运行时，使得计算机执行上述任一方面所述的方法。
本申请还提供了一种计算机程序产品，当其在计算机上运行时，使得计算机执行上述任一方面所述的方法。
本申请还提供了一种用于协作传输控制的芯片，其中存储有指令，当其在通信设备上运行时，使得通信设备执行上述各方面所述的对应方法。
本申请还提供了一种协作传输控制的装置，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现上述各方面所述的对应方法。
本申请还提供了一种协作传输控制的装置，包括处理器，该处理器用于与存储器耦合，并读取存储器中的指令，并根据所述指令实现上述各方面所述的对应方法。可以理解的，该存储器可以集成在处理器中，也可以独立于处理器之外。
本申请还提供了一种协作传输控制的装置，包括处理器，所述处理器执行计算机程序时实现上述各方面所述的对应方法。
本申请还提供了一种协作传输控制的系统，包括上述提供的主AP侧的装置，以及至少一个上述提供的从AP侧的装置，这些系统组成分别实现上述各方面所述的对应方法。
可以理解地，上述提供的任一种装置、计算机存储介质、计算机程序产品、芯片、系统均用于实现上文所提供的对应的方法，因此，其所能达到的有益效果可参考对应的方法中的有益效果，此处不再赘述。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对本申请实施例描述中所需要使用的附图作简单的介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施 例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据本申请实施例的内容和这些附图获得其他的附图。
图1是本申请涉及的一种网络系统架构；
图2是本申请提供的一种协作传输控制的方法的第一个实施例的流程图；
图3是本申请提供的一种协作(并行)传输请求信息格式示意图；
图4是本申请提供的一种协作传输控制的方法的第二个实施例的流程图；
图5是本申请提供的另一种协作传输控制的方法的第一个实施例的流程图；
图6是本申请提供的另一种协作传输控制的方法的第二个实施例的流程图；
图7a是本申请提供的一种协作(并行)传输响应信息格式示意图；
图7b是本申请提供的另一种协作(并行)传输响应信息格式示意图；
图7c是本申请提供的另一种协作(并行)传输响应信息格式示意图；
图7d是本申请提供的一种协作(并行)传输响应信息与干扰测试信息传输方式示意图；
图7e是本申请提供的另一种协作(并行)传输响应信息格式示意图；
图7f是本申请提供的另一种协作(并行)传输响应信息格式示意图；
图7g是本申请提供的一种协作(并行)传输响应信息与干扰测试信息传输方式示意图；
图7h是本申请提供的另一种协作(并行)传输响应信息格式示意图；
图8a是本申请提供的一种AP2调度时机示意图；
图8b是本申请提供的另一种AP2调度时机示意图；
图9是本申请提供的一种简化的协作传输控制的装置结构示意图；
图10是本申请提供的一种简化的网络设备结构示意图。
具体实施方式
为使本申请解决的技术问题、采用的技术方案和达到的技术效果更加清楚，下面将以实施例的形式结合附图对本申请的技术方案作进一步详细的描述。所述详细的描述通过使用方框图、流程图和/或示例提出了设备和/或过程的各种实施例。由于这些方框图、流程图和/或示例包含一个或多个功能和/或操作，所以本领域技术人员将理解可以通过许多硬件、软件、固件或它们的任意组合单独和/或共同实施这些方框图、流程图或示例内的每个功能和/或操作。
本申请中“多个”是指两个或两个以上。本申请中的术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。本申请中的术语“第一”、“第二”等是为了区分不同的对象，并不限定该不同对象的顺序。
本申请中，名词“网络”和“系统”经常交替使用，但本领域的技术人员可以理解其含义。本申请所提及的所有“站点(Station，简称为STA)”/“终端”，在一些情况下可以是指移动设备，例如移动电话、个人数字助理、手持或膝上型计算机以及具有电信能力的类似设备，有些情况下还可以是穿戴设备等，还可以是指可端接用户的通信会话的任何硬件或软件组件。此外，“用户终端”、“User Equipment”、“UE”、“终 端设备”、“用户设备”、“用户代理”、“User Agent”、“UA”、“用户装备”、“移动设备”和“设备”等皆是与本文中“站点(Station，简称为STA)”/“终端”同义的替代术语。为方便描述，本申请中，上面提到的设备统称为站点或STA。
本申请中提及的“接入点(Access Point，简称为AP)”，是一种网络设备，部署在无线接入网中用以为终端设备提供无线通信功能的装置，能够负责调度和配置STA的上/下行传输。所述接入点可以包括各种形式的宏基站、微基站、中继站、接入点等等，包括作为对传统无线电信系统中的对等设备改进的系统和设备。这种高级或下一代设备可以包含在长期演进LTE通信系统、5G通信系统、未来演进系统或者多种通信融合系统中，在采用不同的无线接入技术的系统中，具备接入点功能的设备名称可能会有所不同。为方便描述，本申请中，上述为STA提供无线通信功能的装置统称为接入点或AP。
本申请中提及的“协作传输”，是指至少两个AP/STA都进行小区内的通信传输，但为避免两个小区的相互干扰，进行协作的传输方式。这种协作传输，也可以因为至少两个AP/STA同时都在传输，因而称作并行传输。
图1给出了本申请涉及的一种网络系统架构，该系统中，存在2个或多个AP，对于每个AP，存在1个或多个与其关联的STA。此外，多个AP中存在一个主AP(如AP1)和至少一个从AP(如AP2、AP3等)，该AP1为竞争到信道使用权或AC从AP组选举出来的主AP，作为AP组中，进行联合传输时，其传输优先保证的接入点。作为主AP的AP1可以是其传输优先保证的接入点，可选的，该AP1还可以是AP组根据预定规则选举出来或竞争出来作为AP组控制点的接入点，其可以对AP组实行传输、资源等控制和管理功能，并可协调多个AP进行协作传输。可选的，AP组的控制和管理功能可以通过一个额外的接入控制器实现(Access Controller，简称为AC)，AP组还可以设置一个额外的AC，用于协调多个AP进行协作传输。AP之间、AP和AC之间均可以采用有线传输，也可以采用无线传输。
在该系统中，如果AP1调度其小区中的STA1进行上行传输，而同时AP2调度其小区中的STA2进行下行传输，由于距离较近，AP2的下行传输会对上行接收的AP1造成可能的强干扰；或者，如果AP1调度其小区中的STA1进行下行传输，而同时AP2调度其小区中的STA2进行上行传输，由于距离较近，AP1的下行传输会对上行接收的AP2造成可能的强干扰；为了避免干扰，则AP1的小区与AP2的小区不能进行协作传输，这样导致通信效率不高。因此，本申请中，通过在主AP和从AP间的协作传输控制，实现干扰控制的同时提高通信效率。
实施例一
系统中，主接入点(AP1)与至少一个从接入点(AP2、AP3等)之间若要进行协作传输，需采用本实施例的方法进行协作传输控制，从而防止造成小区间的干扰。根据本申请的实施例，图2为本申请提供的一种协作传输控制的方法的第一个实施例的流程图，该实施例以AP1待上行传输和AP2待下行传输的场景为例进行说明，但不限于此，AP1对应调度的站点为STA1，AP2对应调度的站点为STA2。为了便于方案理解，在描述时，本实施例及后续实施例皆以AP2作为从接入点为例，并从交互多方的角度进行整体描述，但绝非限定系统中改进在于交互各侧的步骤必须合在一起执行，本申请提出的技术方案，在系统中每一侧均有改进。
该方法包括：
S101、从接入点AP接收AP1发送的协作传输请求，其中携带协商参数信息。
某AP获取信道使用权后，或在系统中已被选举出来后，确定为主(即，AP1)，系统中其他AP为从AP(如，AP2、AP3……)，此时系统中需要保证AP1的数据传输和AP1对应站点STA1的调度。AP1确定要调度STA1进行上行传输，向从AP(如AP2)发送协作传输请求，可选的该协作传输请求的信息格式可以采用动作(Action)帧，该帧结构具体可参见图3，图3给出了一种协作(协作)传输请求信息格式示意图，可以携带协商参数信息，可选的，包括有以下至少一项：AP1的天线数、AP1小区1内的空间流数、基本服务集合颜色(Basic Service Set Color，简称为BSS Color)用于标识AP1服务的小区、发送地址(即AP1的地址)、上下行指示用于指示AP1是上行还是下行(本实施例中是上行)、接收地址(即AP2的地址)、要调度的STA1发送数据的带宽/资源块；以上参数信息不构成对本申请的限制，例如还可以有发送功率、调制与编码信息等。
S102、AP2根据所述协商参数信息，确定是否要与所述AP1进行协作传输。
AP2可根据所述协商参数信息，确定是否要与AP1协作传输，例如AP2根据所述空间流数和AP1的天线数信息，结合自身的天线数确定能否与AP1进行协作传输。比如，若所述空间流数等于AP1的天线数，而AP2的天线数小于等于AP1的天线数，则AP2无法通过空间预留方向防止对AP1接收上行数据产生干扰，无法进行协作传输；若所述空间流数小于等于AP1的天线数，而AP2的天线数大于AP1的天线数，或者，若所述空间流数小于AP1的天线数，而AP2的天线数小于等于AP1的天线数，则AP2可以通过空间预留方向防止对AP1接收上行数据产生干扰，可以进行协作传输；以上仅为本申请的示例，AP2确定是否要与AP1协作，不限于此方式。
S103、当AP2确定不与所述AP1进行协作传输，AP2向AP1反馈无法进行协作传输的信息。
该步骤为可选步骤，当AP2确定不与所述AP1进行协作传输，可以通过该步骤反馈无法进行协作传输的信息以告知AP1；可选的，如果确定不与所述AP1进行协作传输，AP2也可以在预设时间内不对所述协作传输请求进行回复以使AP1确定AP2无法进行协作传输，这时就不需要该步骤的操作。
对于AP2无法进行协作传输的情况，AP1可以继续选择其他小区的从AP(如AP3)进行协作传输，或者进行单小区传输。
S104、当AP2确定要与所述AP1进行协作传输，所述AP2向所述AP1发送确定要协作传输的响应信息。
该步骤为可选步骤，还可通过步骤S105中发送的干扰测试信息表示AP2确定要协作传输。该响应信息的信息格式可以采用现有的信息格式，如图7a所示，图7a给出了一种协作(协作)传输响应信息格式示意图，其中首先包含了传统短训练字段(Legacy Short Training Field,简称为L-STF)，传统长训练字段(Legacy Long Training Field,简称为L-LTF)，传统信令字段(Legacy Signal Field，简称为L-SIG)，用于保证后向兼容性，并且指示数据的时长。前导码还包括下一代信令A和/或B(Next Generation Signaling A/B，简称为NG-SIG-A/B)，用于携带针对NG标准的信令信息，其中NG指示一个代号，可以代表Next Generation(下一代)，当然也可以采用其他代号。后续为下一代短训练字段(Next Generation Short Training Field，简称为NG-STF)和下一代 长训练字段(Next Generation Long Training Field，简称为NG-LTF)，分别用来进行多入多出(Multiple Input Multiple Output，简称为MIMO)情况下的自动增益控制(Automatic Gain Control，简称为AGC)和信道测量。其中NG-LTF字段可能包含多个NG-LTF符号，用来进行多个空时流上的信道测量。然后是数据(Data)字段部分，用来承载MAC帧，其中，数据字段指示AP2希望进行协作传输。
S105、当AP2确定要与所述AP1进行协作传输，所述AP2向所述AP1发送干扰测试信息。
当所述步骤S104存在时，所述干扰测试信息，可以与所述确定要协作传输的响应信息一起发送或者分开发送，一起发送的帧结构可以采用如图7b所示的数据分组结构，一起发送的帧结构还可以采用如图7c所示的数据分组结构其中干扰测试信息与数据字段之间还设置有填充字段；分开发送的情形，可以如图7d所示，所述干扰测试信息与所述响应信息帧以短帧间距进行分隔。其中，这两种情况，均可通过所述响应信息的信令字段的比特指示，来指示所述数据字段后是否存在干扰测试信息。
可以理解的，在步骤S101中，AP1发送的协作传输请求中，也可以指示是否希望AP2发送的响应信息的数据分组携带干扰测试信息。
所述干扰测试信息，可以为干扰测试序列，可以采用802.11标准中的一些已有序列，如传统长训练序列(Legacy Long Training Field，简称为L-LTF)，可以为高吞吐率长训练序列(High Throughput LTF，简称为HT-LTF)，非常高图怒涛率长训练序列(Very HT LTF，简称为VHT-LTF)，高效长训练序列(High Efficient LTF，简称为HE-LTF)，也可以为随机的序列。
该干扰测试信息可以采用防止对AP1接收数据产生干扰的预编码矩阵Q 2进行发送，所述Q 2的选取标准可选的为：H 21Q 2＝0,其中，H 21为AP1和AP2之间的信道估计信息，本申请不限于此。或考虑到AP2的小区内的接收端情况，采用其他预编码矩阵进行发送。
S106、所述AP1根据接收的所述干扰测试信息，进行干扰测试确定不与AP2进行协作传输。
如果所述步骤104存在，则AP1可根据响应信息的数据字段确定AP2是否要进行协作传输，可选的，根据相应比特指示确定所述数据字段后是否存在干扰测试信息。
所述AP1通过干扰测试信息测试AP2的干扰是否超过预定门限值，若超过门限值，则可以选择不与所述AP2进行协作传输。可选的，干扰等于门限值的情况也可以选择不与所述AP2进行协作传输。
S107、当AP1选择不与所述AP2进行协作传输，发送指示不与AP2协作传输的信息。
该信息可以携带在单独的协作确认帧中发给AP2，或携带在全向发送的针对STA1的上行传输触发帧中，该信息可以是所述帧中对应的比特指示，如1比特指示，取值为0或1，该信息也可以是相应标识，如一个预留标识或者非周边小区存在的AP的标识，表示AP1不希望进行协作传输。
S108、所述AP1根据接收的所述干扰测试信息，进行干扰测试确定与AP2进行协作传输。
如果所述步骤104存在，则AP1可根据响应信息的数据字段确定AP2是否要进行协作传输，可选的，根据相应比特指示确定所述数据字段后是否存在干扰测试信息。
所述AP1通过干扰测试信息测试AP2的干扰是否超过预定门限值，若没有超过门限 值，则可以选择与所述AP2进行协作传输。可选的，干扰等于预定门限值的情况，也可以选择与所述AP2进行协作传输。
S109、当AP1选择与所述AP2进行协作传输，发送指示与AP2协作传输的信息。
该信息可以携带在单独的协作确认帧中发给AP2，或携带在全向发送的针对STA1的上行传输触发帧中，该信息可以是所述帧中对应的比特指示，如1比特指示，取值为0或1，该信息也可以是相应标识，如AP2的标识，表示AP1希望进行协作传输。
需要说明的，如果AP1通过单独的协作确认帧进行反馈，无论是否选择协作传输，随后AP1都会向其待调度的STA1发送上行数据传输触发帧，STA1接收到所述触发帧后，进行上行数据传输。如果AP1通过所述触发帧进行反馈，无论是否选择协作传输，STA1接收到所述触发帧后，进行上行数据传输。
如果AP1选择了协作传输，则AP2接收到所述协作确认帧或所述触发帧后，向待调度的STA2发送下行数据(如果S105中干扰测试信息通过特定的预编码矩阵如Q 2进行发送，则该下行数据也采用Q 2进行发送)，进行与AP1的协作传输。需要说明的，AP2与AP1的协作传输，其结束时间相同或者AP2的下行传输结束时间早于AP1的上行传输结束时间，AP1上行传输的时间信息可以通过前述的任意消息或帧携带。
还需要说明的，所述步骤S103与S104和S105无必然的先后顺序，其只是针对不同情况的不同处理。S106和S107与S108和S109无必然的先后顺序，其只是针对不同情况的不同处理。
本申请实施例的一种协作传输控制的方法，通过小区间配置参数共享和干扰测试的双重判决条件来决定是否进行协作传输，使得接入点能提前获知干扰情况，防止实际进行协作传输时产生干扰，造成不必要的重传，提高了通信效率。
实施例二
图4为本申请提供的一种协作传输控制的方法的第二个实施例的流程图。本实施例与实施例一的区别在于，该实施例针对AP2确定要协作传输的情况，并具体区分了不同条件下，AP2要协作传输的传输控制流程，与实施例一相同或类似的内容在本实施例中不再赘述。
该方法包括：
S201、AP1发送的协作传输请求，AP2接收AP1发送的协作传输请求，其中携带协商参数信息。
携带协商参数信息主要包括有：AP1的天线数和小区1的空间流数。该步骤与实施例一中S101类似，详细说明参见S101，在此不再赘述。
S202、AP2根据所述所述协商参数信息，确定通过单方面波束成形与所述AP1进行协作传输，并确定AP2发送数据的预编码矩阵Q 2。
AP2可根据空间流数和AP1的天线数信息，结合自身的天线数确定能否与AP1进行协作传输。若所述空间流数小于等于AP1的天线数，而AP2的天线数大于AP1的天线数，则AP2可以单方面通过空间预留方向防止对AP1接收上行数据产生干扰，可以进行协作传输。其中，可选定防止对AP1接收数据产生干扰的预编码矩阵Q 2进行数据传输。所述Q 2的选取标准可选的为：H 21Q 2＝0,其中，H 21为AP1和AP2之间的信道估计信息，本申请不限于此。
S203、所述AP2向所述AP1发送确定要协作传输的响应信息。
该步骤为可选步骤，还可通过步骤S204中发送的干扰测试信息表示AP2确定要协作传输。该响应信息的信息格式可以采用如图7a所示的数据分组结构，其中数据字段指示AP2希望进行协作传输。
S204、所述AP2向所述AP1发送干扰测试信息。
当所述步骤S203存在时，所述干扰测试信息，可以与所述确定要协作传输的响应信息一起发送(具体信息格式可以参见图7b或图7c)或者分开发送(具体信息格式可以参见图7d)，该干扰测试信息可采用预编码矩阵Q 2进行发送。
S205、AP2根据所述所述协商参数信息，确定通过双方面波束成形与所述AP1进行协作传输，并确定AP2发送数据的预编码矩阵Q 2’和AP1接收数据的接收均衡矩阵W 1。
AP2可根据所述空间流数和AP1的天线数信息，结合自身的天线数确定能否与AP1进行协作传输。若所述空间流数小于AP1的天线数，而AP2的天线数小于等于AP1的天线数，则可以双方面通过空间预留方向防止对AP1接收上行数据产生干扰，可以进行协作传输。
确定可以双方面通过空间预留方向防止对AP1接收上行数据产生干扰，AP2除了需要确定自己发送端的预编码矩阵Q 2’，还得确定AP1采用某种接收均衡矩阵去接收数据，即AP2采用发送端波束成形，AP1采用接收端波束成形。AP2的Q 2’和AP1的W 1通过以下可选的标准确定：W 1H 21Q 2’＝0，其中，H 21为AP1和AP2之间的信道估计信息，本申请不限于此。
S206、所述AP2向所述AP1发送确定要协作传输的响应信息，其中，携带AP1接收数据的接收均衡矩阵W 1的指示信息。
该响应信息的信息格式可以采用如图7e所示的数据分组结构，其中的数据字段，除了携带AP2是否要协作传输的协作响应信息，还携带AP1接收数据所用的接收均衡矩阵W 1的信息。
S207、所述AP2向所述AP1发送干扰测试信息。
所述干扰测试信息，可以与所述确定要协作传输的响应信息一起发送或者分开发送。一起发送可以采用如图7f所示的方式，与图7c类似，数据字段与干扰测试信息之间设置有填充字段，该字段用于AP1准备利用数据字段所携带的接收均衡矩阵W 1对AP2利用Q 2’发送的干扰测试信息；分开发送可以采用如图7g所示的方式。
需要说明的，S202-S204与S205-S207没有必然的先后顺序，其只是针对不同情况的不同处理。
S208、所述AP1根据接收的所述干扰测试信息，进行干扰测试确定不与AP2进行协作传输。
所述AP1通过干扰测试信息测试AP2的干扰是否超过预定门限值，针对S202-S204的情况，理想的，经过Q 2发送的数据，将不会对AP1造成干扰，但若AP2获取的Q 2不够准确，或者考虑到小区内的接收端采取了其他预编码矩阵，则有可能产生干扰。若超过门限值，则可以选择不与所述AP2进行协作传输，若没有超过门限值，则可以选择与所述AP2进行协作传输。可选的，干扰等于门限值的情况可以选择不与所述AP2进行协作传输，也可以选择与所述AP2进行协作传输。
针对S205-S207的情况，理想的，经过Q 2’发送的数据，当AP1利用W 1进行接收时， 将不会对AP1造成干扰，但若AP2获取的Q 2’或W 1不够准确，或者考虑到小区内的接收端采取了其他预编码矩阵，而AP1考虑了STA1发送数据的接收，可能不会采用W 1进行接收，则有可能产生干扰。若超过门限值，则可以选择不与所述AP2进行协作传输，若没有超过门限值，则可以选择与所述AP2进行协作传输。可选的，干扰等于门限值的情况可以选择不与所述AP2进行协作传输，也可以选择与所述AP2进行协作传输。
S209、当AP1选择不与所述AP2进行协作传输，发送指示不与AP2协作传输的信息。
该步骤与实施例一中S107类似，详细说明参见S107，在此不再赘述。
S210、所述AP1根据接收的所述干扰测试信息，进行干扰测试确定与AP2进行协作传输。
所述AP1通过干扰测试信息测试AP2的干扰是否超过预定门限值，若没有超过门限值，则可以选择与所述AP2进行协作传输。可选的，干扰等于门限值的情况可以选择与所述AP2进行协作传输。
S211、当AP1选择与所述AP2进行协作传输，发送指示与AP2协作传输的信息。
如果AP1选择了协作传输，针对单方面波束成形的情况，AP2接收到所述协作确认帧或所述触发帧后，采用所述Q 2向待调度的STA2发送下行数据，进行与AP1的协作传输；针对双方面波束成形的情况，AP2接收到所述协作确认帧或所述触发帧后，采用所述Q 2’向待调度的STA2发送下行数据，AP1采用所述W 1接收调度的STA1发送上行数据。需要说明的，AP2与AP1的协作传输，其结束时间相同或者AP2的下行传输结束时间早于AP1的上行传输结束时间，AP1上行传输的时间信息可以通过前述的任意消息或帧携带。
该步骤与实施例一中S109类似，相关的其他详细说明参见S109，在此不再赘述。
还需要说明的，所述步骤S208和S209与S210和S211无必然的先后顺序，其只是针对不同情况的不同处理。
本申请实施例的一种协作传输控制的方法，通过针对小区配置参数的情况不同确定避免干扰的波束成形方式，并结合干扰测试的双重判决条件来决定是否进行协作传输，使得能通过波束成形的空间控制方式，防止实际进行协作传输时产生干扰，造成不必要的重传，提高了通信效率。
实施例三
根据本申请的实施例，图5为本申请提供的另一种协作传输控制的方法的第一个实施例的流程图，该实施例以主接入点AP1待下行传输和从接入点AP2待上行传输的场景为例进行说明，但不限于此，AP1对应调度的站点为STA1，AP2对应调度的站点为STA2。为了便于方案理解，在描述时，本实施例及后续实施例皆从交互多方的角度进行整体描述，但绝非限定系统中交互各侧的步骤必须合在一起执行，本申请提出的技术方案，在系统中每一侧均有改进。其中，与前述实施例相同内容的解释和细节，在此不再展开和赘述。
该方法包括：
S301、AP1发送的协作传输请求，AP2接收AP1发送的协作传输请求，所述协作传输请求携带协商参数信息；
某AP获取信道使用权后，或在系统中已被选举出来后，确定为主AP(即，AP1)，系统中其他AP为从AP(如，AP2、AP3……)，此时系统中需要保证AP1的数据传输和 AP1对应站点STA1的调度。AP1确定要调度STA1进行下行传输，向至少一个从AP(如AP2)发送协作传输请求。可选的该协作传输请求的信息格式可以采用动作(Action)帧，该帧结构具体可参见图3，可以携带协商参数信息，可选的包括有以上至少一项：AP1的天线数、AP1的小区1的空间流数、基本服务集合颜色(Basic Service Set Color，简称为BSS Color)用于标识AP1服务的小区、发送地址(即AP1的地址)、上下行指示用于指示AP1是上行还是下行(本实施例中是下行)、接收地址(即AP2的地址)、STA1接收数据的带宽/资源块；以上参数信息不构成对本申请的限制，例如还可以有发送功率、调制与编码信息等。
S302、AP2根据所述所述协商参数信息，确定是否要与所述AP1进行协作传输。
AP2可根据所述协商参数信息，确定是否要与AP1协作传输，例如AP2可根据所述空间流数和AP1的天线数信息，结合自身的天线数确定能否与AP1进行协作传输。比如，若所述空间流数等于AP1的天线数，而AP2的天线数小于等于AP1的天线数，则AP2无法通过空间预留方向防止对AP1接收上行数据产生干扰，无法进行协作传输；若所述空间流数小于等于AP1的天线数，而AP2的天线数大于AP1的天线数，或者，若所述空间流数小于AP1的天线数，而AP2的天线数小于等于AP1的天线数，则AP2可以通过空间预留方向防止对AP1接收上行数据产生干扰，可以进行协作传输；以上仅为本申请的示例，AP2确定是否要与AP1协作，不限于此方式。
S303、当AP2确定不与所述AP1进行协作传输，AP2向AP1反馈无法进行协作传输的信息。
该步骤为可选步骤，当AP2确定不与所述AP1进行协作传输，可以通过该步骤反馈无法进行协作传输的信息以告知AP1；可选的，如果确定不与所述AP1进行协作传输，AP2也可以在预设时间内不对所述协作传输请求进行回复以使AP1确定AP2无法进行协作传输，这时就不需要该步骤的操作。
对于AP2无法进行协作传输的情况，AP1可以继续选择其他小区的从AP(如AP3)进行协作传输，或者进行单小区传输。
S304、当AP2确定要与所述AP1进行协作传输，所述AP2向所述AP1发送确定要协作传输的响应信息。
AP2确定要与AP1进行协作传输时，向AP1发送确定要协作传输的响应信息，可以通过协作传输响应帧发送，其信息格式可以采用现有的信息格式，如图7a所示，具体说明可参见实施一中的相关描述，在此不再赘述，其中，数据字段指示AP2希望进行协作传输。
S305、AP1发送干扰测试信息，AP2接收干扰测试信息。
AP1发送干扰测试信息可选的有两类实现方式，一是AP1可以单独针对AP2发送干扰测试信息，二是也可以将发给STA1的下行数据分组复用作为干扰测试信息，通过全向发送的方式使AP2能够接收。对于第二种方式，还可以分成两种情况，一是AP1在正式的对STA1发送下行数据分组之前，先提前发送对STA1的一单独下行数据分组，来测试干扰，二是用AP1正式对STA1发送的下行数据分组来测试干扰，该数据分组可以是现有的信息格式，如图b和g所示，其中NG-STF和NG-LTF部分可以作为测试序列。
AP2可以采用防止AP1对其接收数据产生干扰的接收均衡矩阵W 2进行接收，或考虑到AP2的小区内的发送端情况，采用其他接收均衡矩阵进行接收。所述W 2的选取标准可 选的为：H 21W 2＝0,其中，H 21为AP1和AP2之间的信道估计信息，本申请不限于此。
S306、AP2根据干扰测试信息进行干扰测试，确定不与AP1进行协作传输。
AP2通过干扰测试信息测试AP1的干扰是否超过预定门限值，若超过门限值，则可以选择不与所述AP1进行协作传输。则，AP2不对其对应的STA2进行调度，不调度STA2进行上行数据传输，而AP1对STA1的下行数据传输因为要保证，所以无论AP2是否参与协作传输，AP1的下行数据传输照常进行不受影响。可选的，干扰等于门限值的情况也可以确定不与所述AP1进行协作传输。
S307、AP2根据干扰测试信息进行干扰测试，确定与AP1进行协作传输。
AP2通过干扰测试信息测试AP1的干扰是否超过预定门限值，若没有超过门限值，则可以选择与所述AP1进行协作传输。可选的，干扰等于门限值的情况也可以确定与所述AP1进行协作传输。
S308、当AP2选择与所述AP1进行协作传输，则调度STA2进行上行数据传输。
调度STA2进行上行数据传输，AP2可向STA2发送触发帧，来调度STA2进行上行数据传输。
针对S305中AP1发送干扰测试信息的形式不同，AP2发送触发帧和调度STA2进行上行数据传输的形式也有不同：
针对AP1单独针对AP2发送干扰测试信息，或者AP1先提前发送对STA1的一单独下行数据分组来测试干扰的情况，可以如图8a给出的AP2调度时机示意图所示，所述触发帧的传输在AP1正式发给STA1的下一帧的下行数据分组中的数据字段的传输结束前启动，可以与下一帧的下行数据分组传输同时开始，也可以在下一帧的下行数据分组传输的过程中任意时刻启动，但所述调度的第二STA的上行数据传输需在所述下一帧的下行数据分组中的数据字段的传输结束前结束，或与所述下一帧的下行数据分组中的数据字段的传输同时结束；
针对用AP1正式对STA1发送的下行数据分组来测试干扰，其中可以采用相应的训练字段作为测试序列，如采用下一代短训练字段(Next Generation Short Training Field，简称为NG-STF)和下一代长训练字段(Next Generation Long Training Field，简称为NG-LTF)部分可以作为测试序列的情况，可以如图8b给出的AP2调度时机示意图所示，所述触发帧的传输在该下行数据分组中的传输过程中启动，所述调度的第二STA的上行数据传输在该下行数据分组中的数据字段的传输结束之前结束，或者与该下行数据分组中的数据字段的传输同时结束。
还需要说明的，所述步骤S303与S304和S305无必然的先后顺序，其只是针对不同情况的不同处理。S306与S307和S308无必然的先后顺序，其只是针对不同情况的不同处理。
本申请实施例的一种协作传输控制的方法，通过小区间配置参数共享和干扰测试的双重判决条件来决定是否进行协作传输，使得接入点能提前获知干扰情况，防止实际进行协作传输时产生干扰，造成不必要的重传，提高了通信效率。
实施例四
图6为本申请提供的另一种协作传输控制的方法的第二个实施例的流程图。本实施例与实施例三的区别在于，该实施例针对AP2确定要协作传输的情况，并具体区分了不 同条件下，AP2要协作传输的传输控制流程，与实施例三相同或类似的内容在本实施例中不再赘述。
该方法包括：
S401、AP1发送的协作传输请求，AP2接收AP1发送的协作传输请求，所述协作传输请求携带协商参数信息；
携带协商参数信息主要包括有：AP1的天线数和小区1的空间流数。该步骤与实施例三中S301类似，详细说明参见S301，在此不再赘述。
S402、AP2根据所述所述协商参数信息，确定通过单方面波束成形与所述AP1进行协作传输，并确定接收均衡矩阵W 2。
AP2可根据所述空间流数和AP1的天线数信息，结合自身的天线数确定能否与AP1进行协作传输。若所述空间流数小于等于AP1的天线数，而AP2的天线数大于AP1的天线数，则AP2可以单方面通过对自己接收的数据进行接收波束成形，防止AP1对其接收上行数据产生干扰，可以进行协作传输。
AP2可以采用防止AP1对其接收数据产生干扰的接收均衡矩阵W 2进行接收，所述W 2的选取标准可选的为：H 21W 2＝0,其中，H 21为AP1和AP2之间的信道估计信息，本申请不限于此。
S403、当AP2确定要与所述AP1进行协作传输，所述AP2向所述AP1发送确定要协作传输的响应信息。
AP2确定要与AP1进行协作传输时，向AP1发送确定要协作传输的响应信息，可以通过协作传输响应帧发送，其信息格式可以采用现有的信息格式，如图7a所示，具体说明详见前述实施例，在此不再赘述，其中，数据字段指示AP2希望进行协作传输。
S404、AP2根据所述所述协商参数信息，确定通过双方面波束成形与所述AP1进行协作传输，并确定接收均衡矩阵W 2’和AP1发送数据的预编码矩阵Q 1。
AP2可根据所述空间流数和AP1的天线数信息，结合自身的天线数确定能否与AP1进行协作传输。若所述空间流数小于AP1的天线数，而AP2的天线数小于等于AP1的天线数，则可以双方面通过空间预留方向防止AP1对其接收上行数据产生干扰，可以进行协作传输。AP2除了需要确定自己接收数据的接收均衡矩阵W 2’，还得确定AP1采用某种预编码矩阵Q 1去发送数据，即AP1采用发送端波束成形，AP2采用接收端波束成形。AP1的Q 1和AP2的W 2’通过以下可选的标准确定：W 2’H 21Q 1＝0，其中，H 21为AP1和AP2之间的信道估计信息，本申请不限于此。
S405、当AP2确定要与所述AP1进行协作传输，所述AP2向所述AP1发送确定要协作传输的响应信息和AP1的预编码矩阵Q 1的指示信息。
AP2确定要与AP1进行协作传输时，向AP1发送确定要协作传输的响应信息，可以通过协作传输响应帧发送，其信息格式可以采用现有的信息格式，如图7h所示，其中的数据字段，除了携带AP2是否要协作传输的协作响应信息，还携带了AP1发送数据所用的预编码矩阵Q 1的指示信息。
S406、AP1发送干扰测试信息，AP2接收干扰测试信息。
AP1发送干扰测试信息可选的有两类实现方式，一是AP1可以单独针对AP2发送干扰测试信息，二是也可以将发给STA1的下行数据分组复用作为干扰测试信息，通过全向发送的方式使AP2能够接收。对于第二种方式，还可以分成两种情况，一是AP1在正式的 对STA1发送下行数据分组之前，先提前发送对STA1的一单独下行数据分组，来测试干扰，二是用AP1正式对STA1发送的下行数据分组来测试干扰，该数据分组可以是现有的信息格式，如图b和g所示，其中NG-STF和NG-LTF部分可以作为测试序列。
AP2可以采用防止AP1对其接收数据产生干扰的接收均衡矩阵进行接收，或考虑到AP2的小区内的发送端情况，采用其他接收均衡矩阵进行接收。
S407、AP2根据干扰测试信息进行干扰测试，确定不与AP1进行协作传输。
AP2通过干扰测试信息测试AP1的干扰是否超过预定门限值(可选的，也可以等于门限值)，针对单方面波束成形的情况，理想情况下，当AP2利用W 2进行接收时，AP1将不会对其产生干扰，但若AP2获取的W 2不够准确，或者考虑到小区内的发送端，采取了其他接收均衡矩阵，则有可能产生干扰。针对双方面波束成形的情况，理想情况下，当AP1利用Q 1进行发送，AP2利用W 2’进行接收时，AP1将不会对其产生干扰，但若AP2获取的Q 1或W 2’不够准确，或者AP1考虑到小区内的接收端，采取了其他预编码矩阵，或者AP2采用了其他接收均衡矩阵，则有可能产生干扰。
若干扰超过门限值(可选的，也可以等于门限值)，则AP2可以选择不与所述AP1进行协作传输。则，AP2不对其对应的STA2进行调度，不调度STA2进行上行数据传输，而AP1对STA1的下行数据传输因为要保证，所以无论AP2是否参与协作传输，AP1的下行数据传输照常进行不受影响。
S408、AP2根据干扰测试信息进行干扰测试，确定与AP1进行协作传输。
AP2通过干扰测试信息测试AP1的干扰是否超过预定门限值，若没有超过门限值，则可以选择与所述AP1进行协作传输。可选的，干扰等于预定门限值的情况，也可以确定与AP1进行协作传输。
S409、当AP2选择与所述AP1进行协作传输，则调度STA2进行上行数据传输。
确定调度STA2进行上行数据传输，AP2向STA2发送触发帧，来调度STA2进行上行数据传输。
针对S406中AP1发送干扰测试信息的形式不同，AP2发送触发帧和调度STA2进行上行数据传输的形式也有不同：
针对AP1单独针对AP2发送干扰测试信息，或者AP1先提前发送对STA1的一单独下行数据分组来测试干扰的情况，可以如图8a给出的AP2调度时机示意图所示，所述触发帧的传输与AP1正式发给STA1的下一帧的下行数据分组中的数据字段的传输结束前启动，所述调度的第二STA的上行数据传输在所述下一帧的下行数据分组中的数据字段的传输结束之前结束，或与所述下一帧的下行数据分组中的数据字段的传输同时结束；
针对用AP1正式对STA1发送的下行数据分组来测试干扰，其中NG-STF和NG-LTF部分可以作为测试序列的情况，可以如图8b给出的AP2调度时机示意图所示，所述触发帧的传输在该下行数据分组的传输过程中启动，所述调度的第二STA的上行数据传输在该下行数据分组中的数据字段的传输结束之前结束，或者与该下行数据分组中的数据字段的传输同时结束。
还需要说明的，所述步骤S402和S403与S404和S405无必然的先后顺序，其只是针对不同情况的不同处理。S407与S408和S409无必然的先后顺序，其只是针对不同情况的不同处理。
本申请实施例的一种协作传输控制的方法，通过针对小区配置参数的情况不同确定 避免干扰的波束成形方式，并结合干扰测试的双重判决条件来决定是否进行协作传输，使得能通过波束成形的空间控制方式，防止实际进行协作传输时产生干扰，造成不必要的重传，提高了通信效率。
需要说明的，以上方法皆以AP进行描述，可以理解的是，某些场景下，站点STA也可以相当于上述主AP或从AP，实现上述各方法实施例。
上述主要从系统各实体之间交互进行协作传输控制的流程角度对本申请实施例提供的方案进行了介绍。可以理解的是，各实体，为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对主AP、从AP进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现，参见附图9，附图9为本申请提供的一种简化的协作传输控制的装置结构示意图，该装置90包括相应功能模块：收发单元901和处理单元902。该装置为从AP侧的装置时，用以实现上述从AP(AP2)的相关功能，该装置为主AP侧的装置时，用以实现上述主AP(AP1)的相关功能，其中，所述收发单元901用以实现上述AP1/AP2收发信息或数据的相关功能，所述处理单元902用以实现上述AP1/AP2处理信息或数据的相关功能，具体可见下文相关网络设备实现的描述，在此不再赘述。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。下面以采用对应各个功能划分各个功能模块为例进行说明。
本申请实施例还提供了一种网络设备。该网络设备可以作为接入点AP侧的协作传输控制装置用于执行图2、图4-图6任一附图中AP1或AP2所执行的步骤。需要说明的，该网络设备也可以是具备实现上述方法相当于AP1或AP2的站点STA。图10示出了一种简化的网络设备结构示意图。网络设备100包括1001部分以及1002部分。1001部分主要用于射频信号的收发以及射频信号与基带信号的转换；1002部分主要用于基带处理，对网络设备100进行控制等。1001部分通常可以称为收发单元、收发机、收发电路、或者收发器等。1002部分通常是网络设备100的控制中心，通常可以称为处理单元、控制单元、处理器、或者控制器等，用于控制网络设备100执行上述相关实施例中关于AP1或AP2所执行的步骤。具体可参见上述相关部分的描述。
1001部分的收发单元，也可以称为收发机，或收发器等，其包括天线和射频单元，其中射频单元主要用于进行射频处理。可选的，可以将1001部分中用于实现接收功能的器件视为接收单元，将用于实现发送功能的器件视为发送单元，即1001部分包括接收单元和发送单元。接收单元也可以称为接收机、接收器、或接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
1002部分可以包括一个或多个单板，每个单板可以包括一个或多个处理器和一个或多个存储器，处理器用于读取和执行存储器中的程序以实现基带处理功能以及对网络设 备100的控制。若存在多个单板，各个单板之间可以互联以增加处理能力。作为一种可选的实施方式，也可以是多个单板共用一个或多个处理器，或者是多个单板共用一个或多个存储器，或者是多个单板同时共用一个或多个处理器。其中，存储器和处理器可以是集成在一起的，也可以是独立设置的。在一些实施例中，1001部分和1002部分可以是集成在一起的，也可以是独立设置的。另外，1002部分中的全部功能可以集成在一个芯片中实现，也可以部分功能集成在一个芯片中实现，另外一部分功能集成在其他一个或多个芯片中实现，本申请对此不进行限定。
例如，该网络设备作为主接入点AP1或者AP1中的相关功能装置，在执行AP1所执行的步骤时：
在一种实现方式中，收发单元可用于执行图2的S101、S103、S104、S105、S107和/或S109中AP1所执行的步骤，和/或本申请中的其他步骤。处理单元可用于执行图2的S106和/或S108，和/或执行本申请中的其他步骤。
例如，在另一种实现方式中，收发单元可用于执行图4的S201、S203、S204、S206、S207、S209和/或S211中AP1所执行的步骤，和/或本申请中的其他步骤。处理单元可用于执行图4的S208和/或S210，和/或执行本申请中的其他步骤。
例如，在另一种实现方式中，收发单元可用于执行图5的S301、S303、S304和/或S305中AP1所执行的步骤，和/或本申请中的其他步骤。处理单元可用于执行本申请中的其他步骤。
例如，在另一种实现方式中，收发单元可用于执行图6的S401、S403、S405和/或S406中AP1所执行的步骤，和/或本申请中的其他步骤。处理单元可用于执行本申请中的其他步骤。
又例如，该网络设备作为从接入点AP2或者AP2中的相关功能装置，在执行AP2所执行的步骤时：
在一种实现方式中，收发单元可用于执行图2的S101、S103、S104、S105、S107和/或S109
中AP2所执行的步骤，和/或本申请中的其他步骤。处理单元可用于执行图2的S102，和/或执行本申请中的其他步骤。
例如，在另一种实现方式中，收发单元可用于执行图4的S201、S203、S204、S206、S207、S209和/或S211中AP2所执行的步骤，和/或本申请中的其他步骤。处理单元可用于执行图4的S202和/或S205，和/或执行本申请中的其他步骤。
例如，在另一种实现方式中，收发单元可用于执行图5的S301、S303、S304、S305和/或S308中AP2所执行的步骤，和/或本申请中的其他步骤。处理单元可用于执行图5的S306和/或S307，和/或执行本申请中的其他步骤。
例如，在另一种实现方式中，收发单元可用于执行图6的S401、S403、S405、S406和/或S409中AP2所执行的步骤，和/或本申请中的其他步骤。处理单元可用于执行图6的S407和/或S408，和/或执行本申请中的其他步骤。
上述提供的任一种网络设备及对应装置中相关内容的解释及有益效果均可参考上文提供的对应的方法实施例，此处不再赘述。
以上提供的主AP侧的装置，其具体实现形式可以是接入节点AP或者具备相应接入 功能的站点STA，例如：可以为接入设备或站点设备，也可以为这些设备中的芯片或功能模块，可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。
以上提供的从AP侧的装置，其具体实现形式可以是接入节点AP或者具备相应接入功能的站点STA，例如：可以为接入设备或站点设备，也可以为这些设备中的芯片或功能模块，可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。
上述提供的任一种网络设备及对应装置中相关内容的解释及有益效果均可参考上文提供的对应的方法实施例，此处不再赘述。
本申请还提供了一种协作传输控制的系统，包括上述实施方式中主AP侧的装置(还可以是实现上述主AP侧功能的STA装置)，以及接入AP侧装置(还可以是实现上述从AP侧功能的站点STA装置)。
本申请还提供了一种计算机程序产品，当其在计算机上运行时，使得计算机执行上述提供的任一种方法。
本申请还提供了一种芯片，其中存储有指令，当其在上述各设备上运行时，使得各设备执行上述提供的方法。
本申请还提供了一种计算机存储介质，其上储存有计算机程序(指令)，当该程序(指令)在计算机上运行时，使得计算机执行上述任一方面所述的方法。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器/控制器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (36)

  1. 一种协作传输控制的方法，其特征在于，所述方法包括：
    从接入点AP接收主AP发送的协作传输请求，所述协作传输请求携带协商参数信息；
    当所述从AP根据所述协商参数信息欲与所述主AP协作传输时，所述从AP向所述主AP发送干扰测试信息，并接收主AP根据所述干扰测试信息发送的指示是否进行协作传输的决定信息。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    当所述从AP根据所述协商参数信息不欲与所述主AP协作传输时，所述从AP在预设时间内不对所述主AP进行反馈，或向所述主AP发送第一响应信息，用于指示所述从AP无法进行协作传输。
  3. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    当所述从AP欲与所述主AP协作传输时，所述从AP向所述主AP发送第二响应信息，用于指示所述从AP希望进行协作传输；
    所述第二响应信息与所述干扰测试信息一起发送，或分开送。
  4. 根据权利要求3所述的方法，其特征在于，所述协作传输请求携带第一指示信息，所述第一指示信息用于指示所述干扰测试信息是否与所述第二响应信息一起发送。
  5. 根据权利要求1所述的方法，其特征在于，所述决定信息携带在协作确认帧中或携带在发给待调度的站点STA的上行传输触发帧中。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述协商参数信息包括以下至少一项：主AP的天线数、主AP对应小区的空间流数。
  7. 根据权利要求6所述的方法，其特征在于，所述从AP向所述主AP发送干扰测试信息，包括：
    若所述空间流数小于等于主AP的天线数，且从AP的天线数大于主AP的天线数，则所述从AP采用第一预编码矩阵Q 2向所述主AP发送所述干扰测试信息，所述Q 2为所述从AP根据预设第一标准确定的避免对主AP接收数据产生干扰的预编码矩阵；
    或，若所述空间流数小于主AP的天线数，且从AP的天线数小于等于主AP的天线数，则所述从AP向所述主AP发送第二指示信息，用于指示所述主AP接收数据的接收均衡矩阵W 1，并采用第二预编码矩阵Q 2’发送所述干扰测试信息，所述Q 2’和W 1分别为所述从AP根据预设第二标准确定的避免对主AP接收数据产生干扰的从AP发送数据的预编码矩阵和主AP接收数据的接收均衡矩阵。
  8. 根据权利要求7所述的方法，其特征在于，
    所述第一标准为H 21Q 2＝0，H 21为主AP和从AP间的信道估计信息；
    所述第二标准为W 1H 21Q 2’＝0，H 21为主AP和从AP间的信道估计信息。
  9. 一种协作传输控制的方法，其特征在于，所述方法包括：
    主接入点AP向至少一个从接入点AP发送协作传输请求，所述协作传输请求携带协商参数信息；
    当所述从AP根据所述协商参数信息欲与所述主AP协作传输时，所述主AP 接收所述从AP发送的干扰测试信息；
    所述主AP根据所述干扰测试信息进行接收干扰测试确定干扰是否大于或大于等于预定门限值；
    根据确定结果，所述主AP向所述从AP发送决定信息指示所述从AP是否进行协作传输。
  10. 根据权利要求9所述的方法，其特征在于，所述方法还包括：
    当所述从AP根据所述协商参数信息确定不与所述主AP协作传输时，所述主AP在预设时间内接收不到所述从AP的反馈，或接收到所述从AP发送的第一响应信息，用于指示所述从AP无法进行协作传输。
  11. 根据权利要求9所述的方法，其特征在于，所述方法还包括：
    当所述从AP欲与所述主AP协作传输时，所述主AP接收所述从AP发送的第二响应信息，用于指示所述从AP希望进行协作传输；
    所述第二响应信息与所述干扰测试信息一起发送，或分开送。
  12. 根据权利要求11所述的方法，其特征在于，所述协作传输请求携带第一指示信息，所述第一指示信息用于指示所述干扰测试信息是否与所述第二响应信息一起发送。
  13. 根据权利要求9所述的方法，其特征在于，所述决定信息携带在协作确认帧中或携带在待调度的站点STA上行传输的触发帧中。
  14. 一种协作传输控制的方法，其特征在于，所述方法包括：
    从接入点AP接收主AP发送的协作传输请求，所述协作传输请求携带协商参数信息；
    当所述从AP根据所述协商参数信息欲与所述主AP协作传输时，所述从AP向所述主AP发送第一响应信息用于指示所述从AP希望进行协作传输；
    所述从AP接收主AP发送的干扰测试信息；
    所述从AP根据所述干扰测试信息的干扰测试结果，确定是否进行协作传输。
  15. 根据权利要求14所述的方法，其特征在于，所述方法还包括：
    当所述从AP根据所述协商参数信息确定不与所述主AP协作传输时，所述从AP在预设时间内不对所述主AP进行反馈，或向所述主AP发送第二响应信息，用于指示所述从AP无法进行协作传输。
  16. 根据权利要求14所述的方法，其特征在于，所述从AP根据所述干扰测试信息的干扰测试结果，确定是否进行协作传输，包括：
    若干扰小于等于预定门限值，则所述从AP向待调度的第二站点STA发送触发帧，调度所述第二STA进行上行数据传输；若干扰大于预定门限值，则所述从AP不发送所述触发帧；
    或，若干扰小于预定门限值，则所述从AP向待调度的第二STA发送触发帧，调度所述第二STA进行上行数据传输；若干扰大于等于预定门限值，则所述从AP不发送所述触发帧。
  17. 根据权利要求16述的方法，其特征在于，所述干扰测试信息包括所述主AP发给待调度的第一STA的下行数据分组中相应的训练字段的信息；
    或，所述干扰测试信息包括所述主AP给所述第一STA发送下行数据分组之 前发送的单独数据分组中相应的字段的信息。
  18. 根据权利要求17所述的方法，其特征在于，
    当所述干扰测试信息包括所述主AP发给所述第一STA的下行数据分组中相应的训练字段的信息时，所述触发帧的传输在所述下行数据分组的传输过程中启动，所述待调度的第二STA的上行数据传输在所述下行数据分组中的数据字段的传输结束之前结束，或者与所述下行数据分组中的数据字段的传输同时结束；或
    当所述干扰测试信息包括所述主AP发给所述第一STA的单独数据分组中相应的字段的信息时，所述触发帧的传输在所述主AP发给所述第一STA的下行数据分组中的数据字段的传输结束前启动，所述待调度的第二STA的上行数据传输在所述下行数据分组中的数据字段的传输结束之前结束，或者与所述下行数据分组中的数据字段的传输同时结束。
  19. 根据权利要求14-18任一项所述的方法，其特征在于，所述协商参数信息包括以下至少一项：主AP的天线数、主AP对应小区的空间流数。
  20. 根据权利要求19所述的方法，其特征在于，所述从AP接收主AP发送的干扰测试信息，包括：
    所述从AP通过选定的避免主AP对其接收数据产生干扰的接收均衡矩阵接收主AP发送的干扰测试信息；
    其中，若所述空间流数小于等于主AP的天线数，且从AP的天线数大于主AP的天线数，则所述从AP根据第一标准选定第一接收均衡矩阵W 2；
    或，若所述空间流数小于主AP的天线数，且从AP的天线数小于等于主AP的天线数，则所述从AP根据第二标准选定第二接收均衡矩阵W 2’和所述主AP发送数据的预编码矩阵Q 1；所述从AP接收主AP发送的干扰测试信息之前，还包括：所述从AP向所述主AP发送第一指示信息，用于指示所述主AP发送数据的预编码矩阵Q 1。
  21. 一种协作传输控制的方法，其特征在于，所述方法包括：
    主接入点AP向从AP发送协作传输请求，所述协作传输请求携带协商参数信息；
    当所述从AP根据所述协商参数信息欲与所述主AP协作传输时，所述主AP接收所述从AP发送的第一响应信息用于指示所述从AP希望进行协作传输；
    所述主AP向所述从AP发送干扰测试信息；
    所述干扰测试信息用于所述从AP进行干扰测试以确定是否进行协作传输。
  22. 根据权利要求21所述的方法，其特征在于，所述方法还包括：
    当所述从AP根据所述协商参数信息确定不与所述主AP协作传输时，所述主AP在预设时间内接收不到所述从AP的反馈，或接收到所述从AP发送的第二响应信息，用于指示所述从AP无法进行协作传输。
  23. 根据权利要求21所述的方法，其特征在于，所述方法还包括：所述主AP接收所述从AP发送的第一指示信息，所述第一指示信息用于指示所述主AP发送数据的预编码矩阵Q 1；
    所述干扰测试信息采用所述Q 1进行发送。
  24. 根据权利要求21-23任一项所述的方法，其特征在于，所述干扰测试信 息包括所述主AP发给待调度站点STA的下行数据分组中相应的训练字段的信息；
    或，所述干扰测试信息为所述主AP给所述待调度站点STA发送下行数据分组之前发送的单独数据分组中相应的字段的信息。
  25. 一种协作传输控制的装置，其特征在于，所述装置应用于从接入点AP侧，包括：
    接收单元，用于接收主AP发送的协作传输请求，所述协作传输请求携带协商参数信息；
    发送单元，用于当所述从AP根据所述协商参数信息欲与所述主AP协作传输时，向所述主AP发送干扰测试信息；
    所述接收单元，还用于接收主AP根据所述干扰测试信息发送的指示是否进行协作传输的决定信息。
  26. 根据权利要求25所述的装置，其特征在于，所述协商参数信息包括以下至少一项：主AP的天线数、主AP对应小区的空间流数。
  27. 根据权利要求26所述的装置，其特征在于，所述发送单元还用于：
    若所述空间流数小于等于主AP的天线数，且从AP的天线数大于主AP的天线数，采用第一预编码矩阵Q 2向所述主AP发送所述干扰测试信息，所述Q 2为所述从AP根据预设第一标准确定的避免对主AP接收数据产生干扰的预编码矩阵；
    或，若所述空间流数小于主AP的天线数，且从AP的天线数小于等于主AP的天线数，向所述主AP发送第一指示信息，用于指示所述主AP接收数据的接收均衡矩阵W 1，并采用第二预编码矩阵Q 2’发送所述干扰测试信息，所述Q 2’和W 1分别为所述从AP根据预设第二标准确定的避免对主AP接收数据产生干扰的从AP发送数据的预编码矩阵和主AP接收数据的接收均衡矩阵。
  28. 一种协作传输控制的装置，其特征在于，所述装置应用于主接入点AP侧，包括：
    发送单元，用于向至少一个从接入点AP发送协作传输请求，所述协作传输请求携带协商参数信息；
    接收单元，用于当所述从AP根据所述协商参数信息欲与所述主AP协作传输时，接收所述从AP发送的干扰测试信息；
    处理单元，用于根据所述干扰测试信息进行接收干扰测试确定干扰是否大于或大于等于预定门限值；
    所述发送单元，还用于根据所述处理单元的确定结果，向所述从AP发送决定信息指示所述从AP是否进行协作传输。
  29. 一种协作传输控制的装置，其特征在于，所述装置应用于从接入点AP侧，包括：
    接收单元，用于接收主AP发送的协作传输请求，所述协作传输请求携带协商参数信息；
    发送单元，用于当所述从AP根据所述协商参数信息欲与所述主AP协作传输时，向所述主AP发送第一响应信息用于指示所述从AP希望进行协作传输；
    所述接收单元，还用于接收主AP发送的干扰测试信息；
    处理单元，用于根据所述干扰测试信息的干扰测试结果，确定是否进行协作 传输。
  30. 根据权利要求29所述的装置，其特征在于，所述处理单元还用于，若干扰小于等于预定门限值，通过所述发送单元向待调度的站点STA发送触发帧，调度所述STA进行上行数据传输；若干扰大于预定门限值，使所述发送单元不发送所述触发帧；或，若干扰小于预定门限值，通过所述发送单元向待调度的站点STA发送触发帧，调度所述STA进行上行数据传输；若干扰大于等于预定门限值，使所述发送单元不发送所述触发帧；
    所述发送单元还用于，根据所述处理单元的控制，发送所述触发帧或不发送所述触发帧。
  31. 根据权利要求29或30所述的装置，其特征在于，所述协商参数信息包括以下至少一项：主AP的天线数、主AP对应小区的空间流数。
  32. 根据权利要求31所述的装置，其特征在于，所述接收单元还用于，通过选定的避免主AP对其接收数据产生干扰的接收均衡矩阵接收主AP发送的干扰测试信息；
    所述处理单元还用于：
    若所述空间流数小于等于主AP的天线数，且从AP的天线数大于主AP的天线数，根据第一标准选定第一接收均衡矩阵W 2；
    或，若所述空间流数小于主AP的天线数，且从AP的天线数小于等于主AP的天线数，根据预设第二标准确定避免主AP对从AP接收数据产生干扰的主AP发送数据的预编码矩阵Q 1和第二接收均衡矩阵W 2’；
    所述发送单元，还用于在所述处理单元确定所述Q 1后，向所述主AP发送第一指示信息，用于指示所述Q 1。
  33. 一种协作传输控制的装置，其特征在于，所述装置应用于主接入点AP侧，包括：
    发送单元，用于向从AP发送协作传输请求，所述协作传输请求携带协商参数信息；
    接收单元，用于当所述从AP根据所述协商参数信息欲与所述主AP协作传输时，接收所述从AP发送的第一响应信息用于指示所述从AP希望进行协作传输；
    所述发送单元，还用于向所述从AP发送干扰测试信息；
    所述干扰测试信息用于所述从AP进行干扰测试以确定是否进行协作传输。
  34. 根据权利要求33所述的装置，其特征在于，所述接收单元还用于，接收所述从AP发送的第一指示信息，所述第一指示信息用于指示所述主AP发送数据的预编码矩阵Q 1；
    所述发送单元还用于，采用所述Q 1发送所述干扰测试信息。
  35. 一种计算机可读存储介质，其上存储有计算机程序，其特征在于，该程序被处理器执行时实现如权利要求1至24中任一项所述的方法。
  36. 一种协作传输控制的装置，包括处理器，其特征在于，所述处理器执行计算机程序时实现如权利要求1至24中任一项所述的方法。
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