WO2015058411A1 - 联合发送方法和设备 - Google Patents

联合发送方法和设备 Download PDF

Info

Publication number
WO2015058411A1
WO2015058411A1 PCT/CN2013/085981 CN2013085981W WO2015058411A1 WO 2015058411 A1 WO2015058411 A1 WO 2015058411A1 CN 2013085981 W CN2013085981 W CN 2013085981W WO 2015058411 A1 WO2015058411 A1 WO 2015058411A1
Authority
WO
WIPO (PCT)
Prior art keywords
joint
message
sending
sta
send
Prior art date
Application number
PCT/CN2013/085981
Other languages
English (en)
French (fr)
Inventor
林英沛
张佳胤
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to ES19174139T priority Critical patent/ES2910251T3/es
Priority to EP19174139.6A priority patent/EP3588793B1/en
Priority to CN201380076195.1A priority patent/CN105247796B/zh
Priority to PCT/CN2013/085981 priority patent/WO2015058411A1/zh
Priority to EP13895902.8A priority patent/EP3043486B1/en
Priority to EP21209215.9A priority patent/EP4016858A1/en
Priority to CN201910477357.1A priority patent/CN110212950B/zh
Publication of WO2015058411A1 publication Critical patent/WO2015058411A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance

Definitions

  • the present invention relates to communication technologies, and in particular, to a joint transmission method and apparatus.
  • Coordinated Multiple Point (CoMP) technology is an effective method for extending the coverage of high data rates in the Long Term Evolution (LTE) system and improving the throughput of the cell edge and the entire system.
  • a cooperative mode in CoMP technology is Joint Transmission (JT).
  • JT Joint Transmission
  • user data is shared among nodes of cooperation, and each node simultaneously sends data to the user.
  • eNodeBK eNodeB2 eNodeB3 provides CoMP service for user UE1 belonging to eNodeB1, and these three eNodeBs simultaneously send the same data for UE1.
  • WLAN Wireless Local Area Networks
  • WLAN Wireless Local Area Networks
  • WLAN Wireless Local Area Networks
  • the WLAN is different from the LTE.
  • the LTE uses the authorized frequency band, and the base station can schedule the determined time-frequency resources to ensure coordinated management between the base stations.
  • the WLAN uses a free unlicensed frequency band, and its channel access mechanism is a contention-based access mechanism, and the AP and the STA access the channel through competition. This kind of competition mechanism brings uncertainty about the use of the channel.
  • the APs that need to coordinate the data transmission are not sure when the channel can be accessed. It is difficult to guarantee the right to use the channel at the same time, so that it is difficult to meet the synchronization of the joint transmission. It is required that the out-of-synchronization between APs will greatly reduce the performance of joint transmission.
  • a joint sending method including:
  • the initiating access point AP sends a request sending message for the joint sending to the terminal STA, where the request sending message includes a joint sending indication, and address information of the cooperative AP scheduled to participate in the joint sending, so that the STA according to the Sending an indication to the cooperative AP corresponding to the address information and the sending AP to send a message for joint transmission, so that the cooperative AP sends data to the STA according to the allowed sending message;
  • the initiating AP After receiving the allowed sending message, the initiating AP sends data to the STA according to the allowed sending message, so as to send data to the STA simultaneously with the cooperative AP.
  • the channel resources of the coordinated AP are reserved or obtained by competition.
  • the sending, by the initiating AP, sending data to the STA according to the allowed sending message includes: the sending AP receiving the first interval of the allowed sending message interval After the time, the data is sent to the STA, where the first fixed time is the same as the second fixed time, and the second fixed time is when the cooperative AP sends data to the STA and receives the interval for allowing the message to be sent. time.
  • the sending, by the initiating AP, the data sent by the sending AP includes: The number corresponding joint transmission cooperation mode transmits data to the STA.
  • the method before the sending the AP receives the permission to send the message, the method further includes: the initiating AP and the collaboration AP
  • the communication mode information is jointly transmitted, and the joint transmission communication mode information includes different AP numbers and a joint transmission cooperation mode corresponding to the number of APs.
  • the request sending message or the permission sending message is a control frame, including a frame header And a frame body; the frame header includes a subtype field subtype, and the frame body includes a category field category> meaning no field indication and a non-memory field indication element; the value of the subtype field subtype is used to indicate The request sending message or the permission sending message is a HEW Indication frame; the value of the category field category is used to indicate a joint sending indication, and the value of the indication field indication is used to indicate that the control frame is used for joint sending Request to send a control frame or an allowable transmission control frame for joint transmission; The address information is set in the indication element field indication elements.
  • the request sending message or the permission sending message is a control frame, where the control The value of the subtype field subtype of the frame through the frame header indicates that the control frame is a request transmission control frame for joint transmission or an allow transmission control frame for joint transmission; address information of the cooperative AP is set in the frame. The header is received in the address field RA.
  • a joint sending method including:
  • the cooperative AP receives the permission to send the message sent by the terminal STA, where the permission to send the message includes the joint sending indication, and the address information of the AP participating in the joint sending; the permission to send the message is that the STA sends the request sent by the sending AP. Sent after the message;
  • the cooperative AP when determining that the address information in the allowed sending message includes its own address information and has its own channel resource participating in the joint sending, according to the The message is allowed to be sent to the STA to transmit data to the STA simultaneously with the originating AP.
  • the channel resources of the coordinated AP are reserved or obtained by competition.
  • the method further includes: the cooperative AP receiving the joint sending request message sent by the STA, the joint The sending request message is used by the STA to query whether the cooperative AP participates in the joint sending, where the joint sending request message includes a joint sending indication, and address information of the cooperative AP scheduled to participate in the joint sending; the cooperative AP determines itself The address information is included in the joint transmission request message, and when it has the channel resource that participates in the joint transmission, the UE sends a joint transmission request acknowledgement message to the STA, so that the STA confirms according to the joint transmission request.
  • the message Determining, by the message, the number of the APs that are jointly sent, and including the number of the APs in the allowable sending message, and the sending, by the sending, the message to the STA, the The number of APs participating in the joint transmission included in the message is allowed to be sent, according to AP corresponding number of cooperative joint transmission mode, transmitting data to the STA.
  • the joint sending request message or the joint sending request acknowledge message is a control frame, including a frame header and a frame body; Include a subtype field subtype, the frame body includes a category field category, The indication field indication and the indication element field indication elements; the value of the subtype field subtype is used to indicate that the joint transmission request message or the joint transmission request acknowledgement message is a HEW Indication frame; the value of the category field category The value of the indication field indication is used to indicate that the control frame is a joint transmission request control frame or a joint transmission request acknowledgement control frame; the address information of the cooperative AP is set in the indication Prime field indication elements.
  • a joint sending method including:
  • the terminal STA receives the request sending message sent by the initiating AP, where the request sending message includes a joint sending indication, and address information of the cooperative AP scheduled to participate in the joint sending;
  • the terminal STA after receiving the request sending message sent by the AP, the terminal STA sends a message to the cooperative AP corresponding to the address information and the sending AP before sending the message to allow the sending of the message.
  • the STA includes: sending, by the STA, a joint sending request message to the cooperative AP, where the joint sending request message is used by the STA to query whether the cooperative AP participates in joint sending, where the JTR frame includes a joint sending indication, and the predetermined And the STA receives the joint sending request acknowledgement message returned by the coordinated AP, where the joint sending request acknowledgement message is that the cooperative AP determines that its own address information is included in the And sending, by the STA, the number of APs participating in the joint transmission according to the joint sending request acknowledgement message, and including the AP number in the joint sending request message Sending the message in the message; the STA receiving the initiating AP and the cooperating AP receiving After the sending of the message, according to the data that is allowed to be sent by the sending message, the method includes: the STA receiving the initiating AP and the cooperating AP, after receiving the allowed sending message, according to the allowed sending message The number of APs included in the joint transmission cooperation mode, and the data sent to the STA at the
  • the fourth aspect provides an initiating access point AP, including:
  • an information sending and receiving unit configured to send, to the terminal STA, a request sending message for joint sending, where the request sending message includes a joint sending indication, and a cooperative AP scheduled to participate in the joint sending Address information, such that the STA sends an allow-to-send message for joint transmission to the cooperating AP corresponding to the address information and the initiating AP according to the joint sending indication, so that the cooperating AP is allowed according to the Transmitting a message to send data to the STA; and receiving the permission to send a message;
  • a data transmission unit configured to: after the information sending and receiving unit receives the permission to send a message, send data to the STA according to the allowed sending message, to implement sending data to the STA simultaneously with the cooperative AP.
  • the data transmission unit is specifically configured to send data to the STA after the information receiving and receiving unit receives the allowed message interval for a first fixed time
  • the first fixed time is the same as the second fixed time
  • the second fixed time is a time when the cooperative AP sends data to the STA and receives the interval for allowing the message to be sent.
  • the data transmission unit is specifically configured to perform a joint transmission cooperation mode corresponding to the number of APs participating in the joint sending, Send data to the STA.
  • the information transceiver unit is further configured to: interact with the collaboration AP before receiving the permission to send a message.
  • the communication mode information is jointly transmitted, and the joint transmission communication mode information includes a different number of APs and a joint transmission cooperation mode corresponding to the number of the APs.
  • the request sending message or the permission sending message is a control frame, including a frame header And a frame body; the frame header includes a subtype field subtype, and the frame body includes a category field category> meaning no field indication and a non-memory field indication element; the value of the subtype field subtype is used to indicate The request sending message or the permission sending message is a HEW Indication frame; the value of the category field category is used to indicate a joint sending indication, and the value of the indication field indication is used to indicate that the control frame is used for joint sending The request transmission control frame or the permission transmission control frame for joint transmission; the address information of the cooperation AP is set in the indication element field indication elements.
  • the request sending message or the permission sending message is a control frame
  • the control frame indicates that the control frame is a request transmission control frame for joint transmission or an allow transmission control frame for joint transmission by using a value of a subtype field subtype of the frame header; the address information of the cooperative AP is set in The frame header is received in the address field RA.
  • a collaborative access point AP including:
  • the information transceiving unit is configured to receive an allowable sending message sent by the terminal STA, where the allowed sending message includes a joint sending indication, and address information of an AP participating in the joint sending; the allowing the sending message is that the STA is receiving the initiating AP The sent request is sent after the message is sent;
  • An information processing unit configured to determine, according to the joint sending indication included in the allowed sending message, whether the address information in the allowed sending message includes its own address information and whether it has a channel resource that participates in the joint sending;
  • a data transmission unit configured to send data to the STA according to the allowed sending message when the determining result of the information processing unit is yes, to implement sending data to the STA simultaneously with the initiating AP.
  • the information sending and receiving unit is further configured to: before receiving a message to be sent by the terminal STA, receiving a joint sending request message sent by the STA, the joint sending The request message is used by the STA to query whether the cooperative AP participates in the joint sending, where the joint sending request message includes a joint sending indication, and address information of the cooperative AP scheduled to participate in the joint sending; the information processing unit is further used.
  • the information sending and receiving unit is instructed to reply the joint sending request acknowledgement message to the STA, so that the Determining, according to the joint sending request acknowledgement message, the number of APs participating in the joint sending, and including the number of the APs in the allowed sending message; the data transmitting unit is specifically configured to receive the After allowing the message interval to be sent for a second fixed time, according to the permission to send The number of APs participating in the joint transmission is sent to the STA according to a joint transmission cooperation mode corresponding to the number of APs; the second fixed time is the same as the first fixed time, where the A fixed time is the time when the initiating AP sends data to the STA and the interval at which the message is allowed to be sent.
  • the joint sending request message or the joint sending request acknowledge message is a control frame, including a frame header and a frame body; Include a subtype field subtype, the frame body includes a category field category, an indication field indication and an indication element field indication elements;
  • the value of the segment subtype is used to indicate that the joint sending request message or the joint sending request acknowledgement message is a HEW Indication frame;
  • the value of the category field category is used to indicate a joint sending indication, and the value of the indication field indication is
  • the control frame is used to indicate that the control frame is a joint transmission request control frame or a joint transmission request acknowledgement control frame; and the address information of the coordinated AP is set in the indication element.
  • a terminal STA including:
  • the information sending and receiving unit is configured to receive a request sending message sent by the initiating AP, where the request sending message includes a joint sending indication and address information of the cooperative AP scheduled to participate in the joint sending; and, according to the joint sending indication, The cooperative AP corresponding to the address information and the originating AP send an allowable sending message for joint sending;
  • a data receiving unit configured to receive data that is sent by the initiating AP and the cooperative AP according to the permission to send a message after receiving the permission to send a message.
  • the information sending and receiving unit is further configured to: when the channel resource of the coordinated AP is obtained based on contention, send a joint sending request message to the cooperative AP, where The joint sending request message is used by the STA to query whether the cooperative AP participates in joint sending, where the JTR frame includes a joint sending indication, and the address information of the cooperative AP scheduled to participate in the joint sending; and receiving the a joint sending request acknowledgement message returned by the cooperative AP, the joint sending request acknowledgement message is when the cooperative AP determines that its own address information is included in the joint sending request message, and has its own channel resource participating in the joint sending
  • the information processing unit is configured to: determine, according to the joint sending request acknowledgement message, the number of APs participating in the joint sending, and include the number of APs in the allowed sending message; the data receiving unit Specifically, after receiving the sending AP and the cooperative AP, after receiving the allowed sending message, Joint according to the allowed transmission cooperative mode number included in the message sent by
  • the technical effect of the joint sending method and device provided by the present invention is that the initiating AP notifies the cooperating AP and the initiating AP to send data to the STA according to the allowed sending message, so that the cooperating AP sends the data to the STA according to the allowed sending message. And the initiating AP can implement synchronous transmission according to the allowed sending message, and ensure synchronous transmission of each AP participating in the cooperation when jointly transmitting.
  • FIG. 1 is an optional scenario applicable to an embodiment of a joint sending method according to the present invention
  • FIG. 2 is a schematic flowchart of an embodiment of a joint sending method according to the present invention.
  • FIG. 3 is a schematic flowchart of another embodiment of a joint sending method according to the present invention.
  • FIG. 4 is a schematic flowchart of still another embodiment of a joint sending method according to the present invention.
  • FIG. 5 is a schematic structural diagram of a MAC layer frame header control field in another embodiment of the joint sending method according to the present invention.
  • FIG. 6 is a schematic structural diagram of a CTS frame in a further embodiment of the joint transmission method according to the present invention
  • FIG. 7 is a schematic diagram of a structure of a HEW Indication frame body in another embodiment of the joint transmission method according to the present invention
  • FIG. 8 is a schematic diagram of a transmission process in another embodiment of a joint sending method according to the present invention.
  • FIG. 9 is a schematic diagram of a transmission process in another embodiment of a joint sending method according to the present invention.
  • FIG. 10 is a schematic structural diagram of an embodiment of an initiating AP according to the present invention.
  • Figure 11 is a schematic structural view of an embodiment of the collaboration
  • FIG. 12 is a schematic structural diagram of a terminal STA according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of another embodiment of a terminal STA according to the present invention.
  • Embodiments of the present invention provide a joint transmission JT method, which can be applied to a WLAN based on a competition acquisition channel.
  • FIG. 1 is an optional scenario applicable to the embodiment of the method for jointly transmitting the present invention.
  • STA1 is associated with an API
  • AP2 and AP3 are cooperative APs of an API
  • AP1, AP2, and AP3 belong to the same collaboration set.
  • the AP establishes a cooperative relationship that participates in the joint transmission, and can cooperatively send data to STA1.
  • the joint transmission method of the embodiment of the present invention will be described by using FIG.
  • the API is called the initiating AP, that is, STA1 is associated with the API, and the API will initiate the JT, requesting that AP2 and AP3 cooperate with each other to send data to STA1; and AP2 and AP3 are called cooperative APs, mainly It is the collaboration API that transfers data at the same time.
  • FIG. 2 is a schematic flowchart of a method for jointly sending a method according to the present invention.
  • the method may be performed by an AP.
  • the method in this embodiment may include:
  • the initiating access point AP sends a request sending message for joint sending to the terminal STA, where
  • the request sending message includes a joint sending indication, and address information of a cooperative AP scheduled to participate in the joint sending;
  • the initiating AP may send a request to send a message to STA1 after competing for the channel resource; and include, in the request sending message, a joint sending indication, and address information of the cooperative AP scheduled to participate in the joint sending.
  • the request sending message may be a request for joint transmission to send a JT-RTS control frame, and the JT-RTS control frame is taken as an example to describe the solution of the present invention; of course, in a specific implementation,
  • the request to send message can also be a control frame of another name or other means.
  • the joint sending indication is included in the JT-RTS control frame, so that after receiving the JT-RTS control frame, the STA, according to the joint sending indication, knows that the joint is performed next.
  • the sending method so that subsequent corresponding processing can be performed, for example, whether the cooperative AP can participate in the joint sending or the like.
  • the cooperative AP that is scheduled to participate in the joint transmission is pre-interacted by the initiating AP and the AP that establishes the cooperative relationship.
  • the API has previously established a cooperative relationship with AP2 and AP3, so it can jointly send AP2 and AP3 as scheduled participation. Collaborate the AP, and carry the address information of AP2 and AP3 in the JT-RTS control frame to notify the STA.
  • the STA may determine, according to the joint sending indication, that the processing to be performed by the STA is to send the coordinated AP corresponding to the address information included in the JT-RTS control frame and the initiating AP. Allows for the transmission of JT-CTS control frames for joint transmission.
  • the role of the JT-RTS control frame is mainly: after the initiating AP contends to the channel, the STA is notified by sending the JT-RTS control frame to the STA, for example, how many cooperative APs may be present. Participate in this joint sending, as well as the address information of these collaborative APs.
  • the function of the JT-CTS control frame is mainly that the STA sends the JT-CTS control frame to each AP participating in the joint transmission, and after receiving the JT-CTS control frame, each AP can perform synchronous data transmission according to the JT-CTS control frame.
  • the initiating AP After receiving the permission to send the message, the initiating AP sends data to the STA according to the allowed sending message, so as to send data to the STA simultaneously with the cooperative AP.
  • the allowed sending message also includes the joint sending indication and the address information of the AP participating in the joint sending.
  • the AP participating in the joint sending may be the AP scheduled to participate in the joint sending, or may be Determining the AP participating in the joint transmission will be described in detail in the following embodiments.
  • the permission to send message may be a JT-CTS control frame, and the JT-CTS control frame is taken as an example to describe the solution of the present invention; of course, in a specific implementation, the permission to send The message can also be a control frame of another name or other means.
  • the cooperative AP After receiving the JT-CTS control frame, the cooperative AP includes its own address information in determining the JT-CTS control frame according to the joint transmission indication included in the JT-CTS control frame, and has its own participation in the
  • the channel resources are jointly transmitted, data is simultaneously transmitted to the STA according to the JT-CTS control frame.
  • the channel resources that participate in the joint transmission may be reserved or may be obtained by competition.
  • the JT-CTS control frame may include the address information of the initiating AP, or may not include the address information of the initiating AP.
  • the initiating AP may transmit data to the STA according to the control frame, for example, a time interval from receiving the JT-CTS control frame for a fixed time (for example, a short interframe spacing (Short Inter- Frame Space, abbreviated as: SIFS), may refer to the SIFS that initiates the AP interval as the first fixed time) and then transmit data to the STA.
  • SIFS Short Inter- Frame Space
  • the initiating AP may not need to perform the determination of the address information or the like as the cooperative AP, and may start transmitting data to the STA directly after receiving the JT-CTS control frame at a fixed interval.
  • the initiating AP and the cooperating AP send data to the STA according to the JT-CTS control frame at the same time, which may be that the JT-CTS control frame is received, and the interval is the same fixed time (for example, the initiating AP and the cooperating AP are both received.
  • the JT-CTS control frame interval SIFS wherein the SIFS that initiates the AP interval may be referred to as a first fixed time, and the SIFS of the coordinated AP interval is referred to as a second fixed time), and data transmission to the STA is started at the same time.
  • the JT-CTS control frame may also include the number of APs participating in the joint transmission.
  • the initiating AP and the cooperative AP send data to the STA simultaneously according to the JT-CTS control frame, or may receive the data.
  • the cooperative transmission mode corresponding to the number of APs is transmitted, and data transmission to the STA is started at the same time.
  • the initiating AP and the cooperating AP may each save the jointly sent communication mode information, where the mode information may be previously interacted, and the joint sending communication mode information includes different coordinated AP numbers, and the The joint transmission cooperation mode corresponding to the number of APs.
  • the STA sends the JT-CTS control frame to the cooperative AP, and the cooperative AP is notified to send the data to the STA according to the JT-CTS control frame.
  • the cooperative AP and the initiating AP can perform synchronous transmission according to the JT-CTS control frame. For example, both the initiating AP and the cooperative AP start synchronous transmission after receiving the JT-CTS control frame interval SIFS time, thereby ensuring the participating APs. Synchronous transmission improves the joint transmission performance of the WLAN.
  • FIG. 3 is a schematic flowchart of another embodiment of the method for jointly transmitting the present invention.
  • the method may be performed by a cooperative AP.
  • the method in this embodiment may include:
  • the cooperative AP receives an allowable sending message sent by the terminal STA, where the allowed sending message includes a joint sending indication, and address information of the AP participating in the joint sending.
  • the cooperative AP such as AP2 and AP3 shown in FIG. 1, will receive the JT-CTS control frame sent by STA1, and the JT-CTS control frame is sent by the STA after receiving the JT-RTS control frame sent by the initiating AP.
  • the JT-CTS control frame in this embodiment includes the joint sending indication and the address information of the AP participating in the joint sending.
  • the AP participating in the joint sending may be an AP that is scheduled to participate in the joint sending, or may be an AP that determines to participate in the joint sending. .
  • the cooperative AP sends data to the STA simultaneously with the initiating AP according to the permission to send a message.
  • the cooperative AP determines, according to the joint sending indication included in the JT-CTS control frame, that the address information in the JT-CTS control frame includes its own address information and has its own channel resource participating in the joint transmission. And transmitting data to the STA simultaneously with the initiating AP according to the JT-CTS control frame.
  • the cooperative AP sends data to the STA simultaneously with the initiating AP according to the JT-CTS control frame, and the cooperative AP and the initiating AP may both control the JT-CTS after receiving the JT-CTS control frame. After a fixed time of the same frame interval (for example, interval SIFS), data is simultaneously transmitted to the STA.
  • a fixed time of the same frame interval for example, interval SIFS
  • the cooperative AP and the initiating AP may also, after receiving the JT-CTS control frame, after the fixed time interval of the JT-CTS control frame interval, according to the number of APs participating in the joint transmission included in the JT-CTS control frame. And transmitting the cooperation mode to the STA according to the joint transmission cooperation mode corresponding to the number of the APs.
  • the cooperative AP may also receive a joint sending request message sent by the STA before receiving the JT-CTS control frame sent by the STA, where the joint sending request message is, for example, a joint sending request control frame JTR frame, where the JTR frame is For the STA to query whether the cooperative AP participates in the joint sending, the JTR frame includes a joint sending indication, and address information of the cooperative AP scheduled to participate in the joint sending.
  • the joint sending request message is, for example, a joint sending request control frame JTR frame
  • the JTR frame is For the STA to query whether the cooperative AP participates in the joint sending
  • the JTR frame includes a joint sending indication, and address information of the cooperative AP scheduled to participate in the joint sending.
  • the cooperative AP determines that its own address information is included in the JTR frame, and has its own parameter And when the channel resource is jointly sent, the STA sends a joint transmission request acknowledgement message, for example, a joint transmission request to confirm the JTRA control frame, so that the STA can determine the number of APs participating in the joint transmission according to the JTRA control frame, and The number of APs is included in a JT-CTS control frame.
  • FIG. 4 is a schematic flowchart of still another embodiment of a joint sending method according to the present invention.
  • the method may be performed by a terminal STA.
  • the method in this embodiment may include:
  • the terminal STA receives the request sending message sent by the initiating AP, where the request sending message includes a joint sending indication, and address information of the cooperative AP scheduled to participate in the joint sending, where the cooperative AP scheduled to participate in the joint sending is As determined by the initiating AP, the initiating AP has established a cooperative relationship with the cooperative APs in advance, and the address information of the cooperative AP is obtained, and the address information of the cooperative AP can be carried in the JT-RTS control frame and sent to the STA.
  • the initiating AP may send a JT-RTS control frame to the STA after determining that it is competing for the channel resource.
  • the STA sends, according to the joint sending indication, an allowed sending message for joint sending to the cooperative AP corresponding to the address information and the initiating AP.
  • the STA After receiving the JT-RTS control frame sent by the initiating AP, the STA learns to perform joint transmission according to the joint sending indication included in the JT-RTS control frame; the STA may control the address in the frame to the JT-RTS.
  • the cooperating AP corresponding to the information and the initiating AP send a JT-CTS control frame, so that the initiating AP and the cooperating AP simultaneously transmit data to the STA according to the JT-CTS control frame.
  • the STA may also send the JT-CTS control frame to the cooperative AP and the initiating AP after receiving the JT-RTS control frame sent by the AP.
  • the cooperative AP corresponding to the address information in the RTS control frame sends a JTR frame, where the JTR frame is used by the STA to query whether the cooperative AP participates in joint transmission, where the JTR frame includes a joint sending indication, and a cooperation scheduled to participate in the joint sending.
  • AP address information The cooperative AP may return a JTRA control frame to the STA when determining that its own address information is included in the JTR frame and has its own channel resources (such as reserved or contention) participating in the joint transmission. , confirm that they can participate in this JT.
  • the STA can determine the number of APs participating in the joint transmission and the address information according to the received JTRA control frame, and include the AP number and address information in the JT-CTS control frame.
  • the STA described above queries whether the cooperative AP participates in the JT by sending a JTR control frame, and the cooperative AP notifies the STA that it can participate by replying to the JTRA control frame.
  • the way to choose In a specific implementation, the interaction between the STA and the AP may also be in other manners.
  • the STA receives data that is sent by the initiating AP and the cooperative AP according to the permission to send a message after receiving the permission to send a message.
  • the initiating AP and the cooperative AP when the JT-CTS control frame includes the number of APs of each AP that can participate in the joint transmission, the initiating AP and the cooperative AP, after receiving the JT-CTS control frame, are controlled according to the JT-CTS.
  • the joint transmission cooperation mode corresponding to the number of APs included in the frame, and the data sent to the STA at the same time, can improve the performance of the joint transmission.
  • two optional joint transmission modes will be listed; wherein, in the following description, the following embodiments of the present invention refer to several control frames used in the joint transmission method in the WLAN.
  • JT-RTS control frame JT-CTS control frame
  • JTR control frame JTR control frame
  • JTRA control frame the structure of these several control frames is first described by an embodiment.
  • This embodiment mainly describes the frame structure of the control frame used in the joint transmission method, and mainly describes two optional frame structures:
  • a frame structure is as follows: JT-RTS control frame or JT-CTS control frame, which can be indicated in the MAC frame header in the current MAC layer frame structure, see FIG. 5, FIG. 5 is still another embodiment of the joint sending method of the present invention.
  • FIG. 6 is a schematic structural diagram of a CTS frame in another embodiment of the joint sending method according to the present invention. Referring to FIG. 6, the address information of the cooperative AP may be set in the receiving address field RA of the MAC Header. In this way, when the STA or the AP receives the frame, it can determine whether the frame is a JT-RTS control frame or a JT-CTS control frame in the joint transmission mode according to the subtype in the frame.
  • Another frame structure is as follows: A new control frame is introduced. Specifically, when the subtype value in FIG. 5 is 0000-0110, it is a reserved field.
  • a control subclass is introduced: HEW Indication,
  • the subtype value of the HEW Indication can be defined as 0110.
  • the control frame required for joint transmission is set under the control frame of the HEW Indication subclass.
  • the present embodiment is only an example, and may be changed in a specific implementation; for example, the introduced control subclass may also be a name other than HEW Indication; in addition, the subtype value of the HEW Indication may also be reserved. Any other value in field 0000-0101. Table 1 Description of each subtype of the control frame after the introduction of the HEW Indication
  • the HEW Indication control frame also includes a frame header and a frame body, and the subtype field subtype is in the frame header.
  • the frame header of the HEW Indication control frame may be designed to have the same format as the existing control frame header, and the specific control information is It is placed in the frame body, so that the traditional STA can also obtain relevant information, such as NAV information, from the MAC frame header of the HEW Indication control frame to avoid interference and hidden terminal problems, and achieve backward compatibility.
  • FIG. 7 is a schematic structural diagram of a field of a HEW Indication frame body according to another embodiment of the method for jointly transmitting the present invention, where the frame body includes a category segment category, a field identifier indication, and Alimentation field indication elements.
  • the value of the category field is used to indicate the category of the HEW Indication.
  • the value of the category in this embodiment is used to indicate the joint sending indication, that is, to indicate the JT;
  • Other categories of control frames need to be introduced, other categories can be introduced in Category, and up to 256 categories can be introduced.
  • the value of the indication field Indication in the HEW Indication frame is used to indicate a different control frame type in a certain category. In this embodiment, it is used to indicate that the frame is a JT-RTS control frame or a JT-CTS control frame. For example, when Category indicates a JT category, Indication can indicate four types of control frames: JT_RTS, JT-CTS, JTR, and JTRA. table 3.
  • Table 3 The category field in the HEW Indication frame body field indicates the value of the Indication field when the JT is specified.
  • This frame is sent by initiated
  • JT-RTS coordinated AP including how
  • This frame may be sent by STA to
  • JT-CTS inform how many APs join JT
  • This frame may be sent by STA to
  • This frame may be sent to
  • JTRA respond JTR by coordinated APs
  • the indicator element field in the HEW Indication frame body Indication Elements is used to describe the specific signaling content of the control frame indicated by the Indication field.
  • Table 4_Table 7 describes the information that may be contained in the Indication Elements of the JT-RTS. JT-CTS. JTR and JTRA control frames.
  • the value of the category field category is also used to indicate a joint transmission indication, and the value of the indication field indication is used to indicate the frame. Is the JTR control frame or the JTRA control frame.
  • the address information of the cooperative AP is set in the indication element field indication elements, see MAC Address of Coordinated APs in the above table.
  • control frame HEW Indication and JT_RTS, JT-CTS, JTR and JTRA defined by the new format under the control frame
  • JT_RTS, JT-CTS, JTR and JTRA defined by the new format under the control frame
  • FIG. 8 is a schematic diagram of a transmission process in another embodiment of the joint sending method of the present invention.
  • this embodiment assumes an API (originating AP) and AP2 and AP3 (collaborative APs participating in the joint transmission) establish a cooperative relationship and perform the information exchange jointly sent.
  • the channel resources of AP2 and AP3 may be the current association.
  • the reserved channel is available; and the channel resources of the API can be reserved or competing.
  • the API After the API obtains the channel usage right, the API sends a JT-RTS control frame to the STA1, where the JT-RTS control frame includes a joint sending indication, and address information of the cooperative AP scheduled to participate in the joint sending, and may also include the cooperative AP.
  • the number The format of the specific JT-RTS control frame can be described in the previous embodiment, and is not described in detail.
  • the category field in the HEW Indication frame body can be 0, and the 0 indicates JT, which is equivalent to the joint sending indication.
  • the Indication field in the frame body takes a value of 0, and the 0 represents a JT-RTS control frame; the address information and the number of the cooperative AP may be set in the Indication Elements field.
  • STA1 After receiving the JT-RTS control frame, STA1 knows that the joint transmission is performed according to the joint transmission indication, and that the frame is a JT-RTS control frame; STA1 may send a JT-CTS control frame, the JT-CTS The control frame can be broadcast, and both the cooperative AP and the initiating AP can receive, that is, AP1, AP2, and AP3 can receive the JT-CTS control frame sent by STA1. In the JT-CTS control frame, STA1 may set a joint transmission indication and address information of each AP participating in the joint transmission.
  • each AP may include a cooperative AP and an initiating AP.
  • the cooperative AP included in the JT-CTS control frame is obtained by the STA1 from the JT-RTS control frame, and is a cooperative AP determined by the API to participate in the current JT, such as AP2 and AP3;
  • the resources are reserved.
  • STA1 sends the JT-CTS control frame
  • these cooperative APs can also participate in this JT. If the channel resources of the cooperative AP are not reserved, but the competition is obtained, then STA1 is in JT.
  • the cooperative AP that is scheduled to be received from the JT-RTS control frame carried in the CTS control frame may not participate in the JT after the STA1 sends the JT-CTS control frame, for example, the AP2 receives the JT-CTS.
  • the control frame but it does not compete for channel resources, and does not participate in joint transmission.
  • the initiating AP and the cooperative AP learn that the current joint transmission is performed according to the joint sending indication included in the JT-CTS control frame, and further determine the JT-CTS control frame. Whether the address information includes its own address information; if the JT-CTS control frame includes its own address information and has its own channel resources participating in this JT, it will start to send data to the STA.
  • AP1, AP2, and AP3 can receive the JT-CTS control frame sent by STA1, and both determine that the frame includes its own address information and the channel resources that it has participated in, and AP1, AP2, and The AP3 transmits data to the STA at the same time after the same fixed time as the JT-CTS control frame interval.
  • Figure 8 shows that API, AP2 and AP3 are both in control with JT-CTS.
  • the data is transmitted after the frame interval SIFS, such as the PLCP Protocol Data Unit (PPDU) for STA1, which is to start transmitting data to STA1.
  • SIFS such as the PLCP Protocol Data Unit (PPDU)
  • the foregoing JT-CTS control frame may include an address of the initiating AP (as described in the foregoing solution), or may not include an address of the initiating AP. If it is not included, the initiating AP sends the JT-RTS, and the received JT-CTS defaults to the JT-RTS frame, and then the data is transmitted to the STA.
  • the STA sends a JT-CTS control frame to each AP participating in the joint transmission, and each AP can transmit data to STA1 at a fixed time interval after receiving the control frame, thereby implementing joint transmission. Synchronization.
  • FIG. 9 is a schematic diagram of a transmission process in another embodiment of the method for transmitting a joint according to the present invention.
  • the AP1, the AP2, and the AP3 in the scenario shown in FIG. It is a contention-based joint transmission process, and the channel resources of the cooperative APs such as AP2 and AP3 are also obtained based on the competition, and the channel resources of the cooperative APs as in the fifth embodiment are reserved in advance.
  • the AP1, the AP2, and the AP3 first establish a collaboration relationship. After the collaboration relationship is established, if the API wants to send data to the STA1 through the cooperative mode, the API needs to jointly send the communication mode information with the AP2 and the AP3, including the association. The data sent to STA1, and the number of different cooperative APs, and the joint transmission cooperation mode corresponding to the number of APs. In addition, whether these APs interact with each other participates in this joint transmission, that is, whether they participate in collaboration.
  • the information of the joint transmission cooperation mode corresponding to the number of APs is maintained, because
  • the transmission resources used by AP2 and AP3 for joint transmission are also based on contention. This competition leads to the fact that AP2 and AP3 may not have transmission resources for joint transmission when the API competes for channel usage rights. Failure to perform joint transmission with the expected number of APs will greatly reduce the performance of joint transmission. For example, after AP1, AP2, and AP3 establish a cooperative relationship, the API wants to send data to STA1 through joint sending, and the API can communicate with AP2 and AP3 for joint transmission. AP2 and AP3 can only determine whether they are willing to send jointly and whether there is currently a transmission resource for joint transmission.
  • AP2 or AP3 may not have transmission resources for joint transmission, and therefore cannot participate in the joint transmission. If the three APs of AP1, AP2, and AP3 are planned to be jointly sent, but when the API contends to the channel usage right, AP3 cannot participate in the joint transmission, so only the API and AP2 are jointly sent. At this time, if the API and AP2 are still According to the transmission power and MCS of the original three APs participating in the joint transmission, the performance of the joint transmission is greatly reduced. Therefore, the joint transmission cooperation mode corresponding to the number of APs is maintained. Finally, several APs participate in joint transmission, and data is transmitted according to the power and MCS jointly sent by several APs to ensure the performance of joint transmission.
  • the API After the initiating AP and the cooperative AP exchange and send related information, the API starts to compete for the channel usage right. After the API contends to the channel, it sends a JT-RTS control frame to STA1, which is used to indicate the number of coordinated APs and their address information that are scheduled to be jointly sent.
  • STA1 After receiving the JT-RTS frame, STA1 sends a JTR control frame to the cooperative AP indicated in the JT-RTS, to query whether the cooperative AP can participate in the subsequent joint transmission; the JTR frame includes a joint sending indication, and a reservation. Participating in the address information of the cooperatively transmitted cooperative AP. Since it is sent to multiple APs at the same time, STA1 can broadcast the JTR frame.
  • the cooperating AP that receives the JTR frame checks if its address is in the JTR control frame sent by STA1. If it exists, it is judged whether it can participate in the next joint transmission, that is, whether it has the channel resources participating in the joint transmission, such as whether to reserve resources or compete for resources. If you can participate, you can reply to STA1 with a JTRA control frame. If you are unable to participate, the JTRA control frame will not be replied.
  • STA1 counts the number of received JTRA control frames and the address of the AP that sends these JTRAs, and determines how many APs participate in the next joint transmission, that is, determine the number of APs participating in the joint transmission. Then, STA1 will have a number of APs participating in the joint transmission, that is, the number of APs participating in the joint transmission, and the address information of these APs is placed in the JT-CTS control frame and broadcasted.
  • the AP that receives the JT-CTS control frame determines whether the address information of the UE is in the JT-CTS control frame according to the number of the total APs participating in the joint transmission indicated in the JT-CTS control frame, and if With the channel resources participating in the joint transmission, the AP (including the initiating AP and the cooperating AP) will transmit data to STA1 simultaneously with the JT-CTS control frame interval SIFS according to the joint transmission cooperation mode corresponding to the number of APs.
  • the STA1 receives the data sent by the initiating AP and the cooperative AP according to the joint transmission cooperation mode corresponding to the number of APs.
  • this embodiment does not limit the manner in which the AP replies to the JTRA, and may be TDMA, CDMA, or other multiple access methods.
  • the initiating AP of this embodiment may include: an information transceiving unit 1001 and a data transmission unit 1002;
  • the information transceiving unit 1001 is configured to send, to the terminal STA, a request sending message for joint sending, where the request sending message includes a joint sending indication, and address information of a cooperative AP scheduled to participate in the joint sending, so that the STA Sending, according to the joint sending indication, a cooperating AP corresponding to the address information and the initiating AP, an allow transmission message for joint transmission, so that the cooperating AP sends data to the STA according to the permission to send message; And receiving the permission to send a message;
  • the data transmission unit 1002 is configured to: after the information sending and receiving unit 1001 receives the permission to send a message, send data to the STA according to the permission to send message, so as to send data to the STA simultaneously with the cooperative AP.
  • the data transmission unit 1002 is specifically configured to: after the information sending and receiving list 1001 receives the allowed message interval for a first fixed time, send data to the STA, where the first fixed time and the first fixed time The second fixed time is the same, and the second fixed time is a time when the cooperative AP sends data to the STA and receives the interval for allowing the message to be sent.
  • the data transmission unit 1002 is specifically configured to send data to the STA according to a joint transmission cooperation mode corresponding to the number of APs participating in the joint transmission.
  • the information transceiving unit 1001 is further configured to: when the receiving the message is allowed to be sent, jointly transmit the communication mode information to the cooperative AP, where the joint sending communication mode information includes different APs.
  • the number and the joint transmission cooperation mode corresponding to the number of the APs.
  • the request sending message or the permission sending message is a control frame, including a frame header and a frame body; the frame header includes a subtype field subtype, and the frame body includes a category field category > refers to a field indication and
  • the value of the subtype field subtype is used to indicate that the request to send a message or the permission to send message is a HEW Indication frame; the value of the category field category is used to indicate a joint sending indication.
  • the value of the indication field indication is used to indicate that the control frame is a JT-RTS control frame or a JT-CTS control frame; and the address information of the coordinated AP is set in the indication element field indication elements.
  • the request sending message or the permission sending message is a control frame
  • the value of the subtype field subtype of the frame header indicates that the control frame is a JT-RTS control frame or a JT-CTS control frame; the address information of the cooperative AP is set in the receiving address field RA of the frame header.
  • FIG. 11 is a schematic structural diagram of an embodiment of a cooperative AP according to the present invention.
  • the cooperative AP can perform the method of any method embodiment of the present invention. This embodiment only briefly describes the structure of the cooperative AP, and the specific working principle can be combined with the method implementation. example.
  • the cooperative AP of this embodiment may include: an information transceiving unit 1101, an information processing unit 1102, and a data transmission unit 1103;
  • the information transceiving unit 1101 is configured to receive an allow-to-send message sent by the terminal STA, where the allow-to-send message includes a joint sending indication, and address information of an AP participating in the joint sending, where the sending of the message is initiated by the STA The request sent by the AP is sent after the message is sent;
  • the information processing unit 1102 is configured to determine, according to the joint sending indication included in the allowed sending message, whether the address information in the allowed sending message includes its own address information and whether it has a channel resource participating in the joint sending. ;
  • the data transmission unit 1103 is configured to: when the determination result of the information processing unit is yes, send data to the STA according to the permission to send message and the initiating AP, so as to send data to the STA at the same time as the initiating AP.
  • the information transceiving unit 1101 is further configured to: before receiving the message to be sent sent by the terminal STA, receive a joint sending request message sent by the STA, where the joint sending request message is used by the STA to query the cooperative AP. Whether to participate in the joint sending, the joint sending request message includes a joint sending indication, and address information of the cooperative AP scheduled to participate in the joint sending.
  • the information processing unit 1102 is further configured to: when determining that the address information of the user is included in the joint sending request message, and having the channel resource that participates in the joint sending, instructing the information sending and receiving unit to the STA And acknowledging the joint sending request acknowledgement message, so that the STA determines, according to the joint sending request acknowledgement message, the number of APs participating in the joint sending, and includes the AP number in the allowed sending message.
  • the data transmission unit 1103 is specifically configured to: according to the number of APs that are jointly sent according to the allowed transmission message, after the second fixed time interval of receiving the permission to send a message, according to the AP a joint transmission cooperation mode corresponding to the number, sending data to the STA; the second fixed time is the same as the first fixed time, and the first fixed time is the originating AP The time when the STA sends data and the interval at which the message is allowed to be sent is received.
  • the joint sending request message or the joint sending request acknowledgement message is a control frame, including a frame header and a frame body; the frame header includes a subtype field subtype, and the frame body includes a category field category > refers to a field indication
  • the value of the subtype field subtype is used to indicate that the joint sending request message or the joint sending request acknowledgement message is a HEW Indication frame; the value of the category field category is used for And indicating a joint sending indication, where the value of the indication field indication is used to indicate that the control frame is a JTR control frame or a JTRA control frame; and address information of the coordinated AP is set in the indication element field.
  • FIG. 12 is a schematic structural diagram of a terminal STA according to an embodiment of the present invention.
  • the STA can perform the method of any method embodiment of the present invention. This embodiment only briefly describes the structure of the STA, and the specific working principle can be combined with the method embodiment. .
  • the STA of this embodiment may include: an information transceiving unit 1201 and a data receiving unit 1202;
  • the information transceiving unit 1201 is configured to receive a request sending message sent by the initiating AP, where the request sending message includes a joint sending indication and address information of the cooperative AP scheduled to participate in the joint sending; and, according to the joint sending indication, The cooperative AP corresponding to the address information and the originating AP send an allow message to be sent for joint transmission;
  • the data receiving unit 1202 is configured to receive data that is sent by the initiating AP and the cooperative AP according to the permission to send a message after receiving the allowed sending message.
  • FIG. 13 is a schematic structural diagram of another embodiment of a terminal STA according to the present invention.
  • the information transceiver unit 1201 is further configured to: when the channel resource of the cooperative AP is And sending, according to the competition, a joint sending request message to the cooperative AP, where the joint sending request message is used by the STA to query whether the cooperative AP participates in joint sending, where the JTR frame includes a joint sending indication, and the predetermined And participating in the jointly transmitted address information of the coordinated AP; and receiving a joint sending request acknowledgement message returned by the coordinated AP, where the joint sending request acknowledgement message is that the cooperative AP determines that its own address information is included in the joint Transmitted in the request message, and sent by itself when participating in the channel resource of the joint transmission;
  • the STA further includes: an information processing unit 1203, configured to determine, according to the joint sending request acknowledgement message, the number of APs participating in the joint sending, and include the number of the APs in the allowable sending message.
  • the data receiving unit 1202 is specifically configured to: after receiving the permission to send the message, the initiating AP and the cooperating AP, according to the joint sending cooperation mode corresponding to the number of APs included in the allowed sending message, simultaneously The data sent by the STA.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the above-described method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as ROM, RAM, disk or optical disk.

Landscapes

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

Abstract

本发明提供一种联合发送方法和设备，其中方法包括：发起AP向终端STA发送请求发送消息，所述请求发送消息中包括联合发送指示、以及预定参与所述联合发送的协作AP的地址信息，以使得所述STA根据所述联合发送指示，向所述地址信息对应的协作AP以及所述发起AP发送允许发送消息；所述发起AP在接收到所述允许发送消息后，根据所述允许发送消息向所述STA发送数据，实现与所述协作AP同时向STA发送数据。本发明保证了联合发送时各AP的同步传输。

Description

联合发送方法和设备 技术领域 本发明涉及通信技术， 尤其涉及一种联合发送方法和设备。
背景技术
多点协作 (Coordinated Multiple Point , 简称： CoMP) 技术是长期演 进 （Long Term Evolution, 简称： LTE) 系统中用于扩大高数据率的覆盖范 围， 提高小区边缘乃至整个系统的吞吐量的有效方法之一， CoMP技术中的一 种协作方式是联合发送 （Joint Transmission, 简称： JT) ， 在 JT中， 用户 数据在协作的各节点之间共享，各节点同时向用户发送数据。比如， eNodeBK eNodeB2,eNodeB3为隶属于 eNodeBl的用户 UE1提供 CoMP服务，这三个 eNodeB 同时为 UE1发送相同的数据。由于网络技术和移动设备的飞速发展，基于 IEEE 802. 11标准的无线局域网络 （Wireless Local Area Networks, 简称： WLAN) 技术得到了长足的发展和广泛的应用， 当前也想要在 WLAN中使用 JT技术， 进行多接入点 （Access Point, 简称： AP) 协作传输， 使得 WLAN 中的多个 AP同时给终端 （Station, 简称： STA) 发送数据。
但是， JT技术在 WLAN中的应用遇到如下问题： WLAN与 LTE有所不同， LTE 使用的是授权的确定频段， 基站可以对确定的时频资源进行调度， 保证 各基站间的协作管理； 而 WLAN使用的是免费的非授权频段， 其信道接入机制 是基于竞争的接入机制， AP和 STA通过竞争接入信道。 这种竞争机制带来的 是对信道使用的不确定性，需要协作传输数据的各 AP不确定具体何时可以接 入信道， 难以保证同时获得信道的使用权， 从而难以满足联合发送的同步性 要求， 各 AP间的不同步会大大降低联合发送的性能。 因此， WLAN的信道竞 争机制的不确定性使得 JT技术在 WLAN中实施比较困难。 发明内容 本发明提供一种联合发送方法和设备， 以保证联合发送时各 AP的同步传 输。 第一方面， 提供一种联合发送方法， 包括：
发起接入点 AP向终端 STA发送用于联合发送的请求发送消息，所述请求 发送消息中包括联合发送指示、以及预定参与所述联合发送的协作 AP的地址 信息， 以使得所述 STA根据所述联合发送指示， 向所述地址信息对应的协作 AP以及所述发起 AP发送用于联合发送的允许发送消息， 以使得所述协作 AP 根据所述允许发送消息向所述 STA发送数据；
所述发起 AP在接收到所述允许发送消息后，根据所述允许发送消息向所 述 STA发送数据， 实现与所述协作 AP同时向 STA发送数据。
结合第一方面， 在第一种可能的实现方式中， 所述协作 AP的信道资源是 预留的或者是竞争得到的。
结合第一方面， 在第二种可能的实现方式中， 所述发起 AP根据所述允许 发送消息向所述 STA发送数据， 包括： 所述发起 AP在接收到所述允许发送消 息间隔第一固定时间之后， 向所述 STA发送数据， 所述第一固定时间与第二 固定时间相同，所述第二固定时间是所述协作 AP向所述 STA发送数据时与接 收到所述允许发送消息间隔的时间。
结合第一方面的第二种可能的实现方式， 在第三种可能的实现方式中， 所述发起 AP向所述 STA发送数据， 包括： 所述发起 AP按照与参与所述联合 发送的 AP个数对应的联合发送协作模式， 向所述 STA发送数据。
结合第一方面的第三种可能的实现方式， 在第四种可能的实现方式中， 在所述发起 AP接收到所述允许发送消息之前， 还包括： 所述发起 AP与所述 协作 AP之间交互联合发送通信模式信息，所述联合发送通信模式信息中包括 不同的 AP个数、 以及与所述 AP个数对应的联合发送协作模式。
结合第一方面至第一方面的第四种可能的实现方式中的任一种， 在第五 种可能的实现方式中， 所述请求发送消息或者所述允许发送消息是控制帧， 包括帧头和帧体； 所述帧头包括子类型字段 subtype, 所述帧体包括类别字 段 category > 指不字段 indication禾口指不兀素字段 indication elements; 所述子类型字段 subtype的取值用于指示所述请求发送消息或者所述允许发 送消息是 HEW Indication帧； 所述类别字段 category的取值用于表示联合 发送指示，所述指示字段 indication的取值用于表示所述控制帧是用于联合 发送的请求发送控制帧或者用于联合发送的允许发送控制帧；所述协作 AP的 地址信息设置在所述指示元素字段 indication elements。
结合第一方面至第一方面的第四种可能的实现方式中的任一种， 在第六 种可能的实现方式中， 所述请求发送消息或者所述允许发送消息是控制帧， 所述控制帧通过帧头的子类型字段 subtype的取值表示所述控制帧是用于联 合发送的请求发送控制帧或者用于联合发送的允许发送控制帧； 所述协作 AP 的地址信息设置在所述帧头的接收地址字段 RA中。
第二方面， 提供一种联合发送方法， 包括：
协作 AP接收终端 STA发送的允许发送消息，所述允许发送消息中包括联 合发送指示、 以及参与联合发送的 AP的地址信息； 所述允许发送消息是所述 STA在接收到发起 AP发送的请求发送消息后发送的；
所述协作 AP根据所述允许发送消息中包括的联合发送指示，在确定所述 允许发送消息中的所述地址信息包括自己的地址信息且自己具有参与所述联 合发送的信道资源时， 根据所述允许发送消息向所述 STA发送数据， 以实现 与所述发起 AP同时向 STA发送数据。
结合第二方面， 在第一种可能的实现方式中， 所述协作 AP的信道资源是 预留的或者是竞争得到的。
结合第二方面， 在第二种可能的实现方式中， 所述协作 AP接收终端 STA 发送的允许发送消息之前， 还包括： 所述协作 AP接收所述 STA发送的联合发 送请求消息，所述联合发送请求消息是用于 STA询问所述协作 AP是否参与联 合发送， 所述联合发送请求消息中包括联合发送指示、 以及预定参与所述联 合发送的协作 AP的地址信息； 所述协作 AP在确定自己的地址信息包括在所 述联合发送请求消息中， 且自己具有参与所述联合发送的信道资源时， 则向 所述 STA回复联合发送请求确认消息， 以使得所述 STA根据所述联合发送请 求确认消息确定所述参与联合发送的 AP个数， 并将所述 AP个数包括在所述 允许发送消息中； 所述根据所述允许发送消息向所述 STA发送数据， 包括： 所述协作 AP根据所述允许发送消息中包括的所述参与联合发送的 AP个数， 按照与所述 AP个数对应的联合发送协作模式， 向所述 STA发送数据。
结合第二方面的第二种可能的实现方式， 在第三种可能的实现方式中， 所述联合发送请求消息或者联合发送请求确认消息是控制帧， 包括帧头和帧 体； 所述帧头包括子类型字段 subtype , 所述帧体包括类别字段 category、 指示字段 indication禾口指示元素字段 indication elements; 所述子类型字 段 subtype的取值用于指示所述联合发送请求消息或者所述联合发送请求确 认消息是 HEW Indication帧； 所述类别字段 category的取值用于表示联合 发送指示，所述指示字段 indication的取值用于表示所述控制帧是联合发送 请求控制帧或者联合发送请求确认控制帧；所述协作 AP的地址信息设置在所 述指不兀素字段 indication elements。
第三方面， 提供一种联合发送方法， 包括：
终端 STA接收发起 AP发送的请求发送消息，所述请求发送消息中包括联 合发送指示、 以及预定参与所述联合发送的协作 AP的地址信息；
所述 STA根据所述联合发送指示， 向所述地址信息对应的协作 AP以及所 述发起 AP发送用于联合发送的允许发送消息；
所述 STA接收所述发起 AP和所述协作 AP在接收到所述允许发送消息后， 根据所述允许发送消息同时发送的数据。
结合第三方面， 在第一种可能的实现方式中， 所述终端 STA接收发起 AP 发送的请求发送消息之后， 向所述地址信息对应的协作 AP以及所述发起 AP 发送允许发送消息之前， 还包括： 所述 STA向所述协作 AP发送联合发送请求 消息，所述联合发送请求消息是用于 STA询问所述协作 AP是否参与联合发送， 所述 JTR帧中包括联合发送指示、 以及所述预定参与所述联合发送的协作 AP 的地址信息； 所述 STA接收所述协作 AP返回的联合发送请求确认消息， 所述 联合发送请求确认消息是所述协作 AP在确定自己的地址信息包括在所述联 合发送请求消息中， 且自己具有参与所述联合发送的信道资源时发送的； 所 述 STA根据所述联合发送请求确认消息确定参与联合发送的 AP个数，并将所 述 AP个数包括在所述允许发送消息中； 所述 STA接收所述发起 AP和所述协 作 AP在接收到所述允许发送消息后， 根据所述允许发送消息同时发送的数 据， 包括： 所述 STA接收所述发起 AP和协作 AP在接收到所述允许发送消息 后， 按照与所述允许发送消息中包括的 AP个数对应的联合发送协作模式， 同 时向所述 STA发送的数据。
第四方面， 提供一种发起接入点 AP， 包括：
信息收发单元， 用于向终端 STA发送用于联合发送的请求发送消息， 所 述请求发送消息中包括联合发送指示、 以及预定参与所述联合发送的协作 AP 的地址信息， 以使得所述 STA根据所述联合发送指示， 向所述地址信息对应 的协作 AP以及所述发起 AP发送用于联合发送的允许发送消息， 以使得所述 协作 AP根据所述允许发送消息向所述 STA发送数据； 以及， 接收所述允许发 送消息；
数据传输单元， 用于在所述信息收发单元接收到所述允许发送消息后， 根据所述允许发送消息向所述 STA发送数据， 实现与所述协作 AP同时向 STA 发送数据。
结合第四方面， 在第一种可能的实现方式中， 所述数据传输单元， 具体 用于在所述信息收发单元接收到所述允许发送消息间隔第一固定时间之后， 向所述 STA发送数据， 所述第一固定时间与第二固定时间相同， 所述第二固 定时间是所述协作 AP向所述 STA发送数据时与接收到所述允许发送消息间隔 的时间。
结合第四方面的第一种可能的实现方式， 在第二种可能的实现方式中， 所述数据传输单元，具体用于按照与参与所述联合发送的 AP个数对应的联合 发送协作模式， 向所述 STA发送数据。
结合第四方面的第二种可能的实现方式， 在第三种可能的实现方式中， 所述信息收发单元， 还用于在接收到所述允许发送消息之前， 与所述协作 AP 之间交互联合发送通信模式信息， 所述联合发送通信模式信息中包括不同的 AP个数、 以及与所述 AP个数对应的联合发送协作模式。
结合第四方面至第四方面的第三种可能的实现方式中的任一种， 在第四 种可能的实现方式中， 所述请求发送消息或者所述允许发送消息是控制帧， 包括帧头和帧体； 所述帧头包括子类型字段 subtype, 所述帧体包括类别字 段 category > 指不字段 indication禾口指不兀素字段 indication elements ; 所述子类型字段 subtype的取值用于指示所述请求发送消息或者所述允许发 送消息是 HEW Indication帧； 所述类别字段 category的取值用于表示联合 发送指示，所述指示字段 indication的取值用于表示所述控制帧是用于联合 发送的请求发送控制帧或者用于联合发送的允许发送控制帧；所述协作 AP的 地址信息设置在所述指示元素字段 indication elements。
结合第四方面至第四方面的第三种可能的实现方式中的任一种， 在第五 种可能的实现方式中， 所述请求发送消息或者所述允许发送消息是控制帧， 所述控制帧通过帧头的子类型字段 subtype的取值表示所述控制帧是用于联 合发送的请求发送控制帧或者用于联合发送的允许发送控制帧； 所述协作 AP 的地址信息设置在所述帧头的接收地址字段 RA中。
第五方面， 提供一种协作接入点 AP， 包括：
信息收发单元， 用于接收终端 STA发送的允许发送消息， 所述允许发送 消息中包括联合发送指示、 以及参与联合发送的 AP的地址信息； 所述允许发 送消息是所述 STA在接收到发起 AP发送的请求发送消息后发送的；
信息处理单元， 用于根据所述允许发送消息中包括的联合发送指示， 判 断所述允许发送消息中的所述地址信息是否包括自己的地址信息且自己是否 具有参与所述联合发送的信道资源；
数据传输单元， 用于在所述信息处理单元的判断结果为是时， 根据所述 允许发送消息向 STA发送数据， 以实现与所述发起 AP同时向 STA发送数据。
结合第五方面， 在第一种可能的实现方式中， 所述信息收发单元， 还用 于在接收终端 STA发送的允许发送消息之前， 接收所述 STA发送的联合发送 请求消息，所述联合发送请求消息是用于 STA询问所述协作 AP是否参与联合 发送， 所述联合发送请求消息中包括联合发送指示、 以及预定参与所述联合 发送的协作 AP的地址信息； 所述信息处理单元， 还用于在确定自己的地址信 息包括在所述联合发送请求消息中， 且自己具有参与所述联合发送的信道资 源时， 指示所述信息收发单元向所述 STA回复联合发送请求确认消息， 以使 得所述 STA根据所述联合发送请求确认消息确定所述参与联合发送的 AP个 数， 并将所述 AP个数包括在所述允许发送消息中； 所述数据传输单元， 具体 用于在接收到所述允许发送消息间隔第二固定时间之后， 根据所述允许发送 消息中包括的所述参与联合发送的 AP个数， 按照与所述 AP个数对应的联合 发送协作模式， 向所述 STA发送数据； 所述第二固定时间与第一固定时间相 同，所述第一固定时间是所述发起 AP向所述 STA发送数据时与接收到所述允 许发送消息间隔的时间。
结合第五方面的第一种可能的实现方式， 在第二种可能的实现方式中， 所述联合发送请求消息或者联合发送请求确认消息是控制帧， 包括帧头和帧 体； 所述帧头包括子类型字段 subtype, 所述帧体包括类别字段 category、 指示字段 indication禾口指示元素字段 indication elements; 所述子类型字 段 subtype的取值用于指示所述联合发送请求消息或者所述联合发送请求确 认消息是 HEW Indication帧； 所述类别字段 category的取值用于表示联合 发送指示，所述指示字段 indication的取值用于表示所述控制帧是联合发送 请求控制帧或者联合发送请求确认控制帧；所述协作 AP的地址信息设置在所 述指不兀素字段 indication elements。
第六方面， 提供一种终端 STA, 包括：
信息收发单元， 用于接收发起 AP发送的请求发送消息， 所述请求发送消 息中包括联合发送指示以及预定参与所述联合发送的协作 AP的地址信息； 以 及， 根据所述联合发送指示， 向所述地址信息对应的协作 AP以及所述发起 AP发送用于联合发送的允许发送消息；
数据接收单元， 用于接收所述发起 AP和所述协作 AP在接收到所述允许 发送消息后， 根据所述允许发送消息同时发送的数据。
结合第六方面， 在第一种可能的实现方式中， 所述信息收发单元， 还用 于当所述协作 AP的信道资源是基于竞争得到时， 向所述协作 AP发送联合发 送请求消息，所述联合发送请求消息是用于 STA询问所述协作 AP是否参与联 合发送， 所述 JTR帧中包括联合发送指示、 以及所述预定参与所述联合发送 的协作 AP的地址信息； 以及， 接收所述协作 AP返回的联合发送请求确认消 息，所述联合发送请求确认消息是所述协作 AP在确定自己的地址信息包括在 所述联合发送请求消息中， 且自己具有参与所述联合发送的信道资源时发送 的； 还包括： 信息处理单元， 用于根据所述联合发送请求确认消息确定参与 联合发送的 AP个数， 并将所述 AP个数包括在所述允许发送消息中； 所述数 据接收单元， 具体用于接收所述发起 AP和协作 AP在接收到所述允许发送消 息后， 按照与所述允许发送消息中包括的 AP个数对应的联合发送协作模式， 同时向所述 STA发送的数据。
本发明提供的联合发送方法和设备的技术效果是：发起 AP通过由 STA向 协作 AP发送允许发送消息，来通知协作 AP与发起 AP—起根据该允许发送消 息同时向 STA发送数据， 使得协作 AP和发起 AP能够依据该允许发送消息实 现同步发送， 保证了联合发送时参与协作的各 AP的同步传输。 附图说明 图 1为本发明联合发送方法实施例适用的一种可选场景；
图 2为本发明联合发送方法一实施例的流程示意图；
图 3为本发明联合发送方法另一实施例的流程示意图；
图 4为本发明联合发送方法又一实施例的流程示意图；
图 5为本发明联合发送方法又一实施例中的 MAC层帧头控制字段结构示 意图；
图 6为本发明联合发送方法又一实施例中的 CTS帧结构示意图； 图 7为本发明联合发送方法又一实施例中的 HEW Indication帧体字段结 构示意图；
图 8为本发明联合发送方法又一实施例中的传输过程示意图；
图 9为本发明联合发送方法又一实施例中的传输过程示意图；
图 10为本 明发起 AP实施例的结构示意图；
图 11为本 明协作 ΑΡ实施例的结构示意图；
图 12为本 明终端 STA—实施例的结构示意图；
图 13为本 明终端 STA另一实施例的结构示意图。
具体实施方式 本发明实施例提供了一种联合发送 JT方法，该方法可以适用于基于竞争 获得信道的 WLAN中。图 1为本发明联合发送方法实施例适用的一种可选场景， 如图 1所示， STA1关联于 API , AP2和 AP3是 API的协作 AP， AP1、 AP2和 AP3 属于同一协作集合内相互协作的 AP， 建立了参与联合发送的协作关系， 能够 协作共同向 STA1发送数据。 本发明实施例的联合发送方法， 将以图 1为例， 描述 AP1、 AP2和 AP3之间如何能够保证同时向 STA1传输数据， 满足 JT的同 步性要求。 其中， 为方便描述， 将 API称为发起 AP， 即 STA1是关联于 API 的， API将发起本次 JT， 请求 AP2和 AP3与其协作向 STA1发送数据； 而将 AP2和 AP3称为协作 AP， 主要是协作 API同时传输数据。
实施例一
图 2为本发明联合发送方法一实施例的流程示意图， 该方法可以是发起 AP执行， 如图 2所示， 本实施例的方法可以包括：
201、 发起接入点 AP向终端 STA发送用于联合发送的请求发送消息， 所 述请求发送消息中包括联合发送指示、 以及预定参与所述联合发送的协作 AP 的地址信息；
其中， 发起 AP比如图 1中的 API , 其可以在竞争到信道资源后， 向 STA1 发送请求发送消息； 在该请求发送消息中包括联合发送指示、 以及预定参与 联合发送的协作 AP的地址信息。在后续的本实施例中， 例如该请求发送消息 可以是用于联合发送的请求发送 JT-RTS控制帧， 以 JT-RTS控制帧为例来描 述本发明的方案； 当然在具体实施中， 该请求发送消息也可以是其他名称的 控制帧或者其他方式。
例如， 本实施例中， 在 JT-RTS控制帧中包括所述的联合发送指示， 这样 就使得 STA在接收到 JT-RTS控制帧后， 根据该联合发送指示， 得知接下来进 行的是联合发送方式， 从而可以执行后续相应的处理， 比如询问协作 AP是否 能参与该联合发送等。 预定参与联合发送的协作 AP， 是由发起 AP与建立协 作关系的 AP预先交互好的， 比如 API由于已经预先建立了与 AP2和 AP3的协 作关系， 所以其可以将 AP2和 AP3作为预定参与联合发送的协作 AP， 并且将 AP2和 AP3的地址信息携带在 JT-RTS控制帧中通知 STA。
STA在接收到 JT-RTS控制帧后， 根据所述联合发送指示， 可以确定接下 来 STA要做的处理就是， 向所述 JT-RTS控制帧中包括的地址信息对应的协作 AP以及发起 AP发送用于联合发送的允许发送 JT-CTS控制帧。
本实施例中， JT-RTS控制帧中的作用主要是， 由发起 AP在竞争到信道 后， 通过向 STA发送该 JT-RTS控制帧， 来通知 STA协作 AP的信息， 比如可 能有多少协作 AP参与本次联合发送， 以及这些协作 AP的地址信息。 JT-CTS 控制帧的作用主要是， 由 STA向参与联合发送的各 AP发送该 JT-CTS控制帧， 各 AP在接收到该 JT-CTS控制帧后， 就可以据此进行同步数据传输。
202、 发起 AP在接收到允许发送消息后， 根据所述允许发送消息向所述 STA发送数据， 实现与所述协作 AP同时向 STA发送数据。
其中， 允许发送消息中也会包括联合发送指示， 以及参与联合发送的 AP 的地址信息； 需要说明的是， 这里所述的参与联合发送的 AP， 可以是预定参 与联合发送的 AP， 也可以是确定参与联合发送的 AP， 在后面的实施例中将详 细说明。 在后续的本实施例中， 例如该允许发送消息可以是 JT-CTS控制帧， 以 JT-CTS控制帧为例来描述本发明的方案； 当然在具体实施中， 该允许发送 消息也可以是其他名称的控制帧或者其他方式。
协作 AP在接收到所述 JT-CTS控制帧后，根据所述 JT-CTS控制帧中包括 的联合发送指示，在确定所述 JT-CTS控制帧中包括自己的地址信息且自己具 有参与所述联合发送的信道资源时， 根据所述 JT-CTS控制帧同时向所述 STA 发送数据。 所述的具有参与所述联合发送的信道资源， 这里的信道资源可能 是预留的， 也可以是竞争得到的。
可选的， 所述 JT-CTS控制帧中可以包括发起 AP的地址信息， 也可以不 包括发起 AP的地址信息。发起 AP在接收到 JT-CTS控制帧后， 根据该控制帧 向 STA传输数据即可， 比如是与接收到 JT-CTS控制帧的时间间隔某个固定时 间 （例如间隔短帧间距 （Short Inter-Frame Space , 简称： SIFS ) ， 可以将 该发起 AP间隔的 SIFS称为第一固定时间）后向 STA传输数据。发起 AP可以 不需要如协作 AP那样进行地址信息等的判断， 可以直接在接收到 JT-CTS控 制帧后间隔固定时间即开始向 STA传输数据。
进一步的，发起 AP与协作 AP根据所述 JT-CTS控制帧同时向 STA发送数 据， 可以是在接收到 JT-CTS控制帧， 并且间隔相同的固定时间 （例如发起 AP与协作 AP均在接收到 JT-CTS控制帧间隔 SIFS , 其中， 可以将发起 AP间 隔的 SIFS称为第一固定时间， 将协作 AP间隔的 SIFS称为第二固定时间）之 后， 同时开始向 STA传输数据。
进一步的， JT-CTS控制帧中也可以包括参与联合发送的 AP个数， 这种 情况下， 发起 AP与协作 AP根据所述 JT-CTS控制帧同时向 STA发送数据， 也 可以是在接收到 JT-CTS控制帧， 并且间隔相同的固定时间之后， 按照与所述 AP个数对应的联合发送协作模式， 同时开始向 STA传输数据。
比如， 当共有两个 AP参与本次 JT时， 可以按照联合发送协作模式 Ml进 行发送； 当共有三个 AP参与本次 JT时， 可以按照联合发送协作模式 M2进行 发送； 这样采用与 AP个数适应的协作模式， 可以提高联合发送的性能。 具体 实施中， 发起 AP与协作 AP都可以各自保存联合发送通信模式信息， 该模式 信息可以是在之前交互的， 所述的联合发送通信模式信息中包括不同的协作 AP个数、 以及与所述 AP个数对应的联合发送协作模式。
本实施例的联合发送方法， 通过由 STA向协作 AP发送 JT-CTS控制帧， 来通知协作 AP与发起 AP—起根据该 JT-CTS控制帧同时向 STA发送数据，使 得协作 AP和发起 AP能够依据该 JT-CTS控制帧实现同步发送， 比如， 发起 AP和协作 AP均在接收到 JT-CTS控制帧间隔 SIFS时间后开始同步传输， 从 而保证了参与协作的各 AP的同步传输， 提高了 WLAN的联合发送性能。
实施例二
图 3为本发明联合发送方法另一实施例的流程示意图， 该方法可以是协 作 AP执行， 如图 3所示， 本实施例的方法可以包括：
301、 协作 AP接收终端 STA发送的允许发送消息， 所述允许发送消息中 包括联合发送指示、 以及参与联合发送的 AP的地址信息；
其中，协作 AP比如图 1中所示的 AP2和 AP3，将接收到 STA1发送的 JT-CTS 控制帧，该 JT-CTS控制帧是 STA在接收到发起 AP发送的 JT-RTS控制帧后发 送的， 具体可以参见实施例一。本实施例的 JT-CTS控制帧中包括联合发送指 示、 以及参与联合发送的 AP的地址信息； 该参与联合发送的 AP， 可以是预 定参与联合发送的 AP， 也可以是确定参与联合发送的 AP。
302、 协作 AP根据允许发送消息与所述发起 AP同时向 STA发送数据。 其中， 协作 AP根据所述 JT-CTS控制帧中包括的联合发送指示， 在确定 所述 JT-CTS控制帧中的所述地址信息包括自己的地址信息且自己具有参与 所述联合发送的信道资源时， 则根据所述 JT-CTS控制帧与所述发起 AP同时 向 STA发送数据。
与实施例一中类似的， 协作 AP根据 JT-CTS控制帧与发起 AP同时向 STA 发送数据， 可以是协作 AP和发起 AP在接收到所述 JT-CTS控制帧后， 均与 JT-CTS控制帧间隔相同的固定时间 （例如间隔 SIFS )之后， 同时向 STA发送 数据。
或者，协作 AP和发起 AP也可以在接收到 JT-CTS控制帧后，与所述 JT-CTS 控制帧间隔相同的固定时间之后，根据 JT-CTS控制帧中包括的参与联合发送 的 AP个数， 按照与所述 AP个数对应的联合发送协作模式， 同时向 STA发送 数据。 这种情况时， 协作 AP在接收 STA发送的 JT-CTS控制帧之前， 还可能 接收到 STA发送的联合发送请求消息， 该联合发送请求消息例如是联合发送 请求控制帧 JTR帧， 该 JTR帧是用于 STA询问协作 AP是否参与联合发送的， 所述 JTR帧中包括联合发送指示、以及预定参与所述联合发送的协作 AP的地 址信息。协作 AP在确定自己的地址信息包括在所述 JTR帧中， 且自己具有参 与所述联合发送的信道资源时， 则向 STA回复联合发送请求确认消息， 该消 息例如是联合发送请求确认 JTRA控制帧， 这样 STA就可以根据 JTRA控制帧 确定参与联合发送的 AP个数， 并将所述 AP个数包括在 JT-CTS控制帧中。
实施例三
图 4为本发明联合发送方法又一实施例的流程示意图， 该方法可以是终 端 STA执行， 如图 4所示， 本实施例的方法可以包括：
401、 终端 STA接收发起 AP发送的请求发送消息， 所述请求发送消息中 包括联合发送指示、 以及预定参与所述联合发送的协作 AP的地址信息； 其中， 预定参与所述联合发送的协作 AP是由发起 AP确定的， 发起 AP已 经预先与这些协作 AP之间建立了协作关系， 获知了该协作 AP的地址信息， 能够将协作 AP的地址信息携带在 JT-RTS控制帧中发送给 STA。 发起 AP可以 是在确定自己竞争到信道资源后给 STA发送 JT-RTS控制帧的。
402、 STA根据所述联合发送指示， 向所述地址信息对应的协作 AP以及 所述发起 AP发送用于联合发送的允许发送消息；
其中， STA在接收到发起 AP发送的 JT-RTS控制帧后， 根据该 JT-RTS控 制帧中包括的联合发送指示， 得知要进行联合发送； 则 STA可以向 JT-RTS控 制帧中的地址信息对应的协作 AP以及所述发起 AP发送 JT-CTS控制帧， 以使 得发起 AP和协作 AP根据该 JT-CTS控制帧同时向 STA发送数据。
进一步的， 如果协作 AP的信道资源是基于竞争得到的； 那么 STA在接收 发起 AP发送的 JT-RTS控制帧之后， 向协作 AP以及发起 AP发送 JT-CTS控制 帧之前， STA还可以向 JT-RTS控制帧中的地址信息对应的协作 AP发送 JTR 帧， 所述 JTR帧是 STA用于询问协作 AP是否参与联合发送的， 该 JTR帧中包 括联合发送指示、 以及预定参与所述联合发送的协作 AP的地址信息。 协作 AP在确定自己的地址信息包括在所述 JTR帧中， 且自己具有参与所述联合发 送的信道资源 （该资源比如是预留的或者是竞争得到的） 时， 可以向 STA返 回 JTRA控制帧， 确认其可以参与本次 JT。 STA根据其接收到的 JTRA控制帧 就可以确定参与联合发送的 AP个数及地址信息， 并将所述 AP个数和地址信 息包括在所述 JT-CTS控制帧中。
当然， 上述的 STA通过发送 JTR控制帧来询问协作 AP是否参与 JT、 以 及协作 AP通过回复 JTRA控制帧来通知 STA自己可以参与， 这些方式都是可 选的方式。 在具体实施中， STA与 AP之间的交互也可以采用其他方式。
403、STA接收所述发起 AP和所述协作 AP在接收到所述允许发送消息后， 根据所述允许发送消息同时发送的数据。
进一步的，当 JT-CTS控制帧中包括能够参与联合发送的各 AP的 AP个数 时，发起 AP和协作 AP在接收到所述 JT-CTS控制帧后，将按照与所述 JT-CTS 控制帧中包括的 AP个数对应的联合发送协作模式，同时向所述 STA发送的数 据， 这样可以提高联合发送的性能。
在以下的几个实施例中， 将列举两种可选的联合发送方式； 其中， 在如 下的描述中，将涉及到本发明实施例为 WLAN中的联合发送方法使用到的几种 控制帧， 比如 JT-RTS控制帧、 JT-CTS控制帧、 JTR控制帧、 JTRA控制帧， 首先通过一个实施例对这几种控制帧的结构进行说明。
实施例四
本实施例主要描述联合发送方法中使用到的控制帧的帧结构， 主要描述 两种可选的帧结构：
一种帧结构如下： JT-RTS控制帧或者 JT-CTS控制帧， 可以用目前的 MAC 层帧结构中的 MAC帧头中指示， 参见图 5， 图 5为本发明联合发送方法又一 实施例中的 MAC层帧头控制字段结构示意图。 可以用帧头中的子类型字段 subtype的取值表示该帧是 JT-RTS控制帧或者 JT-CTS控制帧。 图 6为本发 明联合发送方法又一实施例中的 CTS帧结构示意图， 参见图 6， 可以将协作 AP的地址信息设置在帧头 （MAC Header) 的接收地址字段 RA中。 这样， STA 或者 AP在接收到帧时，就可以根据帧中的 subtype确定该帧是联合发送方式 中的 JT-RTS控制帧或者 JT-CTS控制帧。
另一种帧结构如下： 引入了新的控制帧， 具体的， 图 5中的 subtype取 值是 0000-0110时是保留字段 （Reserved) ， 本实施例据此引入一个控制子 类： HEW Indication, 可以定义 HEW Indication的 subtype取值是 0110， 如表 1所示， 在该 HEW Indication子类的控制帧下设置联合发送所需要的控 制帧。 需要说明的是， 本实施例仅是举例， 在具体实施中可以进行变更； 比 如， 引入的控制子类也可以是 HEW Indication之外的其他名称； 此外， HEW Indication的 subtype取值也可以是保留字段 0000-0101中的其他任何一个 值。 表 1 引入 HEW Indication后控制帧的各子类型描述
Type Type description Subtype Subtype description
01 Control 0000-0101 Reserved
0110 HEW Indication
0111 Control Wrapper
1000 Block Ack Request
1001 Block Ack
1010 PS-Pol l
1011 RTS
1100 CTS
1101 ACK
1110 CF-End
1111 CF-End+CF-Ack
HEW Indication控制帧也包括帧头和帧体， 子类型字段 subtype在帧头 中， 该 HEW Indication控制帧的帧头可以设计为如现有的控制帧头的格式完 全一致， 而将具体的控制信息放在帧体 （Frame body) 中， 这样传统的 STA 也可以从 HEW Indication控制帧的 MAC帧头中获取相关信息，比如 NAV信息， 以避免干扰和隐终端问题， 实现后向兼容。
HEW Indication控制帧的帧体结构可以参见图 7， 图 7为本发明联合发 送方法又一实施例中的 HEW Indication帧体字段结构示意图， 帧体包括类别 段 category、指不字段 indication禾口指不兀素字段 indication elements。 其中， 类别字段 category的取值用于指示 HEW Indication的类别， 如表 2 所示， 本实施例中的 category的取值用于表示联合发送指示， 即用于指示 JT;如果在下一代 WiFi网络中需要引入其它类别的控制帧，可以在 Category 中引入其它的类别， 最多可以引入 256种类别。
表 2 HEW Indication帧体字段中 category字段取值说明
Code Meaning
0 JT
1-255 Reserved
HEW Indication帧体中的指示字段 Indication的取值用于指示某一种 Category中不同的控制帧类型， 本实施例中是用于表示该帧是 JT-RTS控制 帧或者 JT-CTS控制帧。 例如当 Category指示为 JT类别时， Indication可 以指示 JT_RTS、 JT-CTS, JTR以及 JTRA四种类别的控制帧， 具体参见如下的 表 3。
表 3 HEW Indication帧体字段中 category字段指示 JT时 Indication字段的取值说明
Indication Name Description
This frame is sent by initiated
AP to inform STA information of
JT-RTS coordinated AP， including how
many APs can join JT and Address
of these APs
This frame may be sent by STA to
JT-CTS inform how many APs join JT and
Address of these APs
This frame may be sent by STA to
request potential APs who can
JTR
join JT whether they can
perform JT now
This frame may be sent to
JTRA respond JTR by coordinated APs
who can join JT now
4-255 Reserved
HEW Indication帧体中的指示元素字段 Indication Elements用来描述 Indication字段指示的控制帧的具体信令内容。例如， 表 4_表 7分别描述了 JT-RTS. JT-CTS. JTR以及 JTRA四种类别的控制帧的 Indication Elements 中可能包含的信息。
表 4 Indication字段指示为 JT-RTS时 Indication Elements中包含的 内容
Figure imgf000016_0001
表 5 Indication字段指示为 JT-CTS时 Indication Elements中包含的
Order Information Notes 0 Category
1 JT-CTS Indication
2 Coordinated AP Number
3 MAC Address of Coordinated APs
表 6 Indication字段指示为 JTR时 Indication Elements中包含的内
Figure imgf000017_0001
表 7 Indication字段指示为 JTRA时 Indication Elements中包含的内容
Figure imgf000017_0002
由上述的表 4-表 7也可以看到， 对于 JTR控制帧或者 JTRA控制帧， 也 是由类别字段 category的取值用于表示联合发送指示， 所述指示字段 indication的取值用于表示该帧是所述 JTR控制帧或者所述 JTRA控制帧。 协作 AP的地址信息设置在指示元素字段 indication elements, 参见上述表 格中的 MAC Address of Coordinated APs。
本实施例通过引入新类型的控制帧 HEW Indication, 以及该控制帧下的 采用新格式定义的 JT_RTS、 JT-CTS, JTR以及 JTRA, 不仅使得该控制帧能够 后向兼容， 而且能够通过该控制帧实现联合发送方法中的更多的信令交互， 以及传递更多的信息比如协作 AP的数目等， 为 WLAN中的联合发送方法的实 现提供支持。
实施例五
图 8为本发明联合发送方法又一实施例中的传输过程示意图， 如图 8所 示， 以图 1所示场景中的 AP1、 AP2和 AP3为例， 本实施例假设 API (发起 AP) 与 AP2和 AP3 (参与联合发送的协作 AP) 建立协作关系并且做好了联合发送 的信息交互。 并且， 本实施例中， AP2和 AP3的信道资源可以是为本次联合 发送预留的； 而 API的信道资源可以是预留或者竞争得到的。
API在竞争获得信道使用权后， 向 STA1发送 JT-RTS控制帧， 该 JT-RTS 控制帧中包括联合发送指示、以及预定参与所述联合发送的协作 AP的地址信 息， 也可以包括这些协作 AP的个数。 具体的 JT-RTS控制帧的格式可以参见 上一个实施例所述，不再详述；比如可以将 HEW Indication帧体中的 category 字段取值为 0，该 0表示 JT，相当于联合发送指示；并且将帧体中的 Indication 字段取值为 0， 该 0表示 JT-RTS控制帧； 协作 AP的地址信息和个数可以设 置在 Indication Elements字段中。
STA1在接收到 JT-RTS控制帧后， 根据联合发送指示得知接下来进行的 是联合发送，并且得知该帧是 JT-RTS控制帧； STA1可以发送 JT-CTS控制帧， 该 JT-CTS控制帧可以是广播的， 协作 AP和发起 AP都可以接收到， 即 AP1、 AP2和 AP3都能够接收到 STA1发送的 JT-CTS控制帧。 在 JT-CTS控制帧中， STA1可以设置联合发送指示以及参与联合发送的各 AP的地址信息。
对于 JT-CTS控制帧中包括的参与联合发送的各 AP的地址信息，具体的， 其中的各 AP， 可以包括协作 AP和发起 AP。 而对于协作 AP， JT-CTS控制帧中 包括的协作 AP是 STA1从 JT-RTS控制帧中得到的，是 API确定的预定参与本 次 JT的协作 AP， 比如 AP2和 AP3; 如果协作 AP的信道资源是预留的， 那么 其实 STA1发送 JT-CTS控制帧后， 这些协作 AP也是都能够参与本次 JT的； 如果协作 AP的信道资源不是预留的， 而是竞争得到的， 那么 STA1在 JT-CTS 控制帧中携带的从 JT-RTS控制帧中得到的所述预定参与的协作 AP， 在 STA1 发送 JT-CTS控制帧后， 也不一定能够参与本次 JT， 比如 AP2接收到 JT-CTS 控制帧， 但是其没有竞争到信道资源， 也不会参与联合发送。
具体的，发起 AP与协作 AP在接收到 JT-CTS控制帧后，都会根据该 JT-CTS 控制帧中包括的联合发送指示得知本次是联合发送， 并进一步判断该 JT-CTS 控制帧中的地址信息是否包括自己的地址信息；如果 JT-CTS控制帧包括自己 的地址信息且自己具有参与本次 JT的信道资源， 才会开始向 STA发送数据。
比如图 8中所示的， AP1、 AP2和 AP3都可以接收到 STA1发送的 JT-CTS 控制帧， 并且都确定该帧中包括自己的地址信息以及自己具有参与的信道资 源， 则 AP1、 AP2和 AP3均在与所述 JT-CTS控制帧间隔相同的固定时间之后， 同时向 STA发送数据。 图 8中示出的是 API、 AP2和 AP3均在与 JT-CTS控制 帧间隔 SIFS之后传输数据， 比如所示的 PLCP协议数据单元 （PLCP Protocol Data Unit , 简称： PPDU) for STA1 , 即为开始传输数据给 STA1。
可选的， 上述的 JT-CTS控制帧中可以包含发起 AP的地址 （如上述方案 所述的），也可以不包含发起 AP的地址。如果不包含，则发起 AP在发送 JT-RTS 之后， 接收到的 JT-CTS就默认为是回应 JT-RTS的帧， 据此向 STA传输数据 即可。
本实施例的联合发送方法， 通过由 STA1向参与联合发送的各 AP发送 JT-CTS控制帧， 各 AP可以在接收到该控制帧后间隔固定时间同时向 STA1传 输数据即可， 实现了联合发送的同步性。
实施例六
图 9为本发明联合发送方法又一实施例中的传输过程示意图， 如图 9所 示， 本实施例仍以图 1所示场景中的 AP1、 AP2和 AP3为例， 只是本实施例的 描述是基于竞争的联合发送过程，协作 AP比如 AP2和 AP3的信道资源也是基 于竞争得到的， 而非如实施例五中的协作 AP的信道资源是提前预留。
本实施例中， AP1、 AP2和 AP3首先建立协作关系， 建立协作关系后， 如 果 API想通过联合发送的协作方式向 STA1发送数据，则 API需要与 AP2、 AP3 交互联合发送通信模式信息， 包括联合发送给 STA1的数据， 以及不同的协作 AP个数、 与所述 AP个数对应的联合发送协作模式等信息。 此外， 这几个 AP 之间还交互是否参与本次联合发送， 即是否参与协作。
本实施例要维护与所述 AP个数对应的联合发送协作模式的信息，是因为
AP2和 AP3用于联合发送的传输资源也是基于竞争的，这种竞争导致了在 API 竞争到信道使用权的时刻， AP2和 AP3不一定能够有传输资源供联合发送使 用。 而不能够以预计的 AP数目进行联合发送， 会大大降低联合发送的性能。 例如， AP1、 AP2和 AP3建立协作关系后， API想通过联合发送的方式向 STA1 发送数据， 则 API与 AP2和 AP3沟通能否进行联合发送。 AP2和 AP3只能判 断是否愿意进行联合发送以及当前是否有传输资源进行联合发送。 由于 API 竞争信道资源的不确定性， 当 API竞争到信道使用权时， AP2或 AP3可能没 有传输资源供联合发送使用， 因此无法参与联合发送。 如果原计划 AP1、 AP2 和 AP3三个 AP进行联合发送， 但是当 API竞争到信道使用权时， AP3无法参 加联合发送， 因而只剩下 API和 AP2联合发送。 这时， 如果 API和 AP2仍然 按照原来三个 AP都参与联合发送时的发射功率和 MCS进行发送数据，则会导 致联合发送的性能大大降低。因此要维护与所述 AP个数对应的联合发送协作 模式， 最后有几个 AP参与联合发送， 就按照几个 AP联合发送的功率和 MCS 进行发送数据， 以保证联合发送的性能。
上述发起 AP与协作 AP交互联合发送的相关信息之后， API开始竞争信 道使用权。 当 API竞争到信道以后， 向 STA1发送 JT-RTS控制帧， 用来指示 接下来要进行联合发送， 预定参与联合发送的协作 AP个数及其地址信息。
STA1收到 JT-RTS帧之后， 向 JT-RTS里指示的协作 AP发送 JTR控制帧， 用来询问这些协作 AP能否参与接下来的联合发送；所述 JTR帧中包括联合发 送指示、 以及预定参与所述联合发送的协作 AP的地址信息。 由于是同时给多 个 AP发送， STA1可以将 JTR帧广播出去。
接收到 JTR帧的协作 AP会检査自己的地址是否在 STA1发送的 JTR控制 帧中。 如果存在， 则判断自己当前能否参与接下来的联合发送， 即判断自己 是否具有参与所述联合发送的信道资源， 比如是否预留资源或者竞争到资源。 如果可以参加， 则可以向 STA1回复一个 JTRA控制帧。 如果无法参加， 则不 回复 JTRA控制帧。
STA1统计接收到的 JTRA控制帧的数目、 以及发送这些 JTRA的 AP的地 址， 判断有多少个 AP参与接下来的联合发送， 即确定参与联合发送的 AP个 数。 然后， STA1将有多少个 AP参加联合发送即参与联合发送的 AP个数， 以 及这些 AP的地址信息放入 JT-CTS控制帧中， 广播出去。
接收到 JT-CTS控制帧的 AP， 根据 JT-CTS控制帧中指示的参与联合发送 的总共 AP的个数和地址信息，判断自己的地址信息是否在 JT-CTS控制帧中， 如果在且自己具有参与联合发送的信道资源， 则 AP (包括发起 AP和协作 AP ) 将按照与 AP个数对应的联合发送协作模式，在与 JT-CTS控制帧间隔 SIFS之 后同时向 STA1发送数据。 STA1接收发起 AP和协作 AP按照所述的 AP个数对 应的联合发送协作模式发送的数据。
可选的， 本实施例不限制 AP回复 JTRA的方式， 可以是 TDMA、 CDMA或者 其他多址接入方式。
实施例七
图 10为本发明发起 AP实施例的结构示意图，该发起 AP能够执行本发明 任意方法实施例的方法， 该实施例仅对发起 AP的结构做简单说明， 其具体的 工作原理可以结合参见方法实施例。 如图 10所示， 本实施例的发起 AP可以 包括： 信息收发单元 1001和数据传输单元 1002;
信息收发单元 1001，用于向终端 STA发送用于联合发送的请求发送消息， 所述请求发送消息中包括联合发送指示、 以及预定参与所述联合发送的协作 AP的地址信息， 以使得所述 STA根据所述联合发送指示， 向所述地址信息对 应的协作 AP以及所述发起 AP发送用于联合发送的允许发送消息， 以使得所 述协作 AP根据所述允许发送消息向所述 STA发送数据； 以及， 接收所述允许 发送消息；
数据传输单元 1002， 用于在所述信息收发单元 1001接收到所述允许发 送消息后， 根据所述允许发送消息向所述 STA发送数据， 实现与所述协作 AP 同时向 STA发送数据。
进一步的， 所述数据传输单元 1002， 具体用于在所述信息收发单 1001 元接收到所述允许发送消息间隔第一固定时间之后， 向所述 STA发送数据， 所述第一固定时间与第二固定时间相同，所述第二固定时间是所述协作 AP向 所述 STA发送数据时与接收到所述允许发送消息间隔的时间。
进一步的， 所述数据传输单元 1002， 具体用于按照与参与所述联合发送 的 AP个数对应的联合发送协作模式， 向所述 STA发送数据。
进一步的， 所述信息收发单元 1001， 还用于在接收到所述允许发送消息 之前， 与所述协作 AP之间交互联合发送通信模式信息， 所述联合发送通信模 式信息中包括不同的 AP个数、以及与所述 AP个数对应的联合发送协作模式。
进一步的， 所述请求发送消息或者所述允许发送消息是控制帧， 包括帧 头和帧体； 所述帧头包括子类型字段 subtype, 所述帧体包括类别字段 category > 指不字段 indication禾口指不兀素字段 indication elements; 所 述子类型字段 subtype的取值用于指示所述请求发送消息或者所述允许发送 消息是 HEW Indication帧； 所述类别字段 category的取值用于表示联合发 送指示， 所述指示字段 indication的取值用于表示所述控制帧是 JT-RTS控 制帧或者 JT-CTS控制帧； 所述协作 AP的地址信息设置在所述指示元素字段 indication elements。
进一步的， 所述请求发送消息或者所述允许发送消息是控制帧， 所述控 制帧通过帧头的子类型字段 subtype的取值表示所述控制帧是 JT-RTS控制帧 或者 JT-CTS控制帧； 所述协作 AP的地址信息设置在所述帧头的接收地址字 段 RA中。
实施例八
图 11为本发明协作 AP实施例的结构示意图，该协作 AP能够执行本发明 任意方法实施例的方法， 该实施例仅对协作 AP的结构做简单说明， 其具体的 工作原理可以结合参见方法实施例。 如图 11所示， 本实施例的协作 AP可以 包括： 信息收发单元 1101、 信息处理单元 1 102和数据传输单元 1103;
信息收发单元 1101， 用于接收终端 STA发送的允许发送消息， 所述允许 发送消息中包括联合发送指示、 以及参与联合发送的 AP的地址信息； 所述允 许发送消息是所述 STA在接收到发起 AP发送的请求发送消息后发送的；
信息处理单元 1102，用于根据所述允许发送消息中包括的联合发送指示， 判断所述允许发送消息中的所述地址信息是否包括自己的地址信息且自己是 否具有参与所述联合发送的信道资源；
数据传输单元 1103， 用于在所述信息处理单元的判断结果为是时， 根据 所述允许发送消息与所述发起 AP向 STA发送数据， 以实现与所述发起 AP同 时向 STA发送数据。
进一步的， 所述信息收发单元 1101， 还用于在接收终端 STA发送的允许 发送消息之前， 接收所述 STA发送的联合发送请求消息， 所述联合发送请求 消息是用于 STA询问所述协作 AP是否参与联合发送，所述联合发送请求消息 中包括联合发送指示、 以及预定参与所述联合发送的协作 AP的地址信息。
所述信息处理单元 1 102， 还用于在确定自己的地址信息包括在所述联合 发送请求消息中， 且自己具有参与所述联合发送的信道资源时， 指示所述信 息收发单元向所述 STA回复联合发送请求确认消息， 以使得所述 STA根据所 述联合发送请求确认消息确定所述参与联合发送的 AP个数， 并将所述 AP个 数包括在所述允许发送消息中。
所述数据传输单元 1 103， 具体用于在接收到所述允许发送消息间隔第二 固定时间之后， 根据所述允许发送消息中包括的所述参与联合发送的 AP个 数， 按照与所述 AP个数对应的联合发送协作模式， 向所述 STA发送数据； 所 述第二固定时间与第一固定时间相同，所述第一固定时间是所述发起 AP向所 述 STA发送数据时与接收到所述允许发送消息间隔的时间。
进一步的，所述联合发送请求消息或者联合发送请求确认消息是控制帧， 包括帧头和帧体； 所述帧头包括子类型字段 subtype, 所述帧体包括类别字 段 category > 指不字段 indication禾口指不兀素字段 indication elements; 所述子类型字段 subtype的取值用于指示所述联合发送请求消息或者所述联 合发送请求确认消息是 HEW Indication帧； 所述类别字段 category的取值 用于表示联合发送指示，所述指示字段 indication的取值用于表示所述控制 帧是 JTR控制帧或者 JTRA控制帧； 所述协作 AP的地址信息设置在所述指示 兀素字段 indication elements。
实施例九
图 12为本发明终端 STA—实施例的结构示意图，该 STA能够执行本发明 任意方法实施例的方法， 该实施例仅对 STA的结构做简单说明， 其具体的工 作原理可以结合参见方法实施例。 如图 12所示， 本实施例的 STA可以包括： 信息收发单元 1201和数据接收单元 1202;
信息收发单元 1201， 用于接收发起 AP发送的请求发送消息， 所述请求 发送消息中包括联合发送指示以及预定参与所述联合发送的协作 AP的地址 信息； 以及， 根据所述联合发送指示， 向所述地址信息对应的协作 AP以及所 述发起 AP发送用于联合发送的允许发送消息；
数据接收单元 1202， 用于接收所述发起 AP和所述协作 AP在接收到所述 允许发送消息后， 根据所述允许发送消息同时发送的数据。
图 13为本发明终端 STA另一实施例的结构示意图， 如图 13所示， 在图 12所示结构的基础上， 所述信息收发单元 1201， 还用于当所述协作 AP的信 道资源是基于竞争得到时， 向所述协作 AP发送联合发送请求消息， 所述联合 发送请求消息是用于 STA询问所述协作 AP是否参与联合发送，所述 JTR帧中 包括联合发送指示、 以及所述预定参与所述联合发送的协作 AP的地址信息； 以及， 接收所述协作 AP返回的联合发送请求确认消息， 所述联合发送请求确 认消息是所述协作 AP在确定自己的地址信息包括在所述联合发送请求消息 中， 且自己具有参与所述联合发送的信道资源时发送的；
该 STA还包括： 信息处理单元 1203， 用于根据所述联合发送请求确认消 息确定参与联合发送的 AP个数， 并将所述 AP个数包括在允许发送消息中。 所述数据接收单元 1202， 具体用于接收所述发起 AP和协作 AP在接收到 所述允许发送消息后，按照与所述允许发送消息中包括的 AP个数对应的联合 发送协作模式， 同时向所述 STA发送的数据。
本领域普通技术人员可以理解： 实现上述各方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成。 前述的程序可以存储于一计算机可 读取存储介质中。 该程序在执行时， 执行包括上述各方法实施例的步骤； 而 前述的存储介质包括： R0M、 RAM, 磁碟或者光盘等各种可以存储程序代码的 介质。
最后应说明的是： 以上各实施例仅用以说明本发明的技术方案， 而非对 其限制； 尽管参照前述各实施例对本发明进行了详细的说明， 本领域的普通 技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改， 或者对其中部分或者全部技术特征进行等同替换； 而这些修改或者替换， 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要 求 书
1、 一种联合发送方法， 其特征在于， 包括：
发起接入点 AP向终端 STA发送用于联合发送的请求发送消息，所述请求 发送消息中包括联合发送指示、以及预定参与所述联合发送的协作 AP的地址 信息， 以使得所述 STA根据所述联合发送指示， 向所述地址信息对应的协作 AP以及所述发起 AP发送用于联合发送的允许发送消息， 以使得所述协作 AP 根据所述允许发送消息向所述 STA发送数据；
所述发起 AP在接收到所述允许发送消息后，根据所述允许发送消息向所 述 STA发送数据， 实现与所述协作 AP同时向 STA发送数据。
2、 根据权利要求 1所述的方法， 其特征在于， 所述协作 AP的信道资源 是预留的或者是竞争得到的。
3、 根据权利要求 1所述的方法， 其特征在于， 所述发起 AP根据所述允 许发送消息向所述 STA发送数据， 包括：
所述发起 AP在接收到所述允许发送消息间隔第一固定时间之后， 向所述 STA发送数据， 所述第一固定时间与第二固定时间相同， 所述第二固定时间 是所述协作 AP向所述 STA发送数据时与接收到所述允许发送消息间隔的时 间。
4、 根据权利要求 3所述的方法， 其特征在于， 所述发起 AP向所述 STA 发送数据， 包括：
所述发起 AP按照与参与所述联合发送的 AP个数对应的联合发送协作模 式， 向所述 STA发送数据。
5、 根据权利要求 4所述的方法， 其特征在于， 在所述发起 AP接收到所 述允许发送消息之前， 还包括：
所述发起 AP与所述协作 AP之间交互联合发送通信模式信息， 所述联合 发送通信模式信息中包括不同的 AP个数、 以及与所述 AP个数对应的联合发 送协作模式。
6、 根据权利要求 1-5任一所述的方法， 其特征在于， 所述请求发送消息 或者所述允许发送消息是控制帧， 包括帧头和帧体；
所述帧头包括子类型字段 subtype , 所述帧体包括类别字段 category、 指不字段 indication禾口指不兀素字段 indication elements; 所述子类型字段 subtype的取值用于指示所述请求发送消息或者所述允 许发送消息是 HEW Indication帧； 所述类别字段 category的取值用于表示 联合发送指示，所述指示字段 indication的取值用于表示所述控制帧是用于 联合发送的请求发送控制帧或者用于联合发送的允许发送控制帧；
所述协作 AP的地址信息设置在所述指示元素字段 indication e l ement S o
7、 根据权利要求 1-5任一所述的方法， 其特征在于，
所述请求发送消息或者所述允许发送消息是控制帧， 所述控制帧通过帧 头的子类型字段 subtype的取值表示所述控制帧是用于联合发送的请求发送 控制帧或者用于联合发送的允许发送控制帧；
所述协作 AP的地址信息设置在所述帧头的接收地址字段 RA中。
8、 一种联合发送方法， 其特征在于， 包括：
协作 AP接收终端 STA发送的允许发送消息，所述允许发送消息中包括联 合发送指示、 以及参与联合发送的 AP的地址信息； 所述允许发送消息是所述 STA在接收到发起 AP发送的请求发送消息后发送的；
所述协作 AP根据所述允许发送消息中包括的联合发送指示，在确定所述 允许发送消息中的所述地址信息包括自己的地址信息且自己具有参与所述联 合发送的信道资源时， 根据所述允许发送消息向所述 STA发送数据， 以实现 与所述发起 AP同时向 STA发送数据。
9、 根据权利要求 8所述的方法， 其特征在于， 所述协作 AP的信道资源 是预留的或者是竞争得到的。
10、 根据权利要求 8所述的方法， 其特征在于， 所述协作 AP接收终端 STA发送的允许发送消息之前， 还包括：
所述协作 AP接收所述 STA发送的联合发送请求消息，所述联合发送请求 消息是用于 STA询问所述协作 AP是否参与联合发送，所述联合发送请求消息 中包括联合发送指示、 以及预定参与所述联合发送的协作 AP的地址信息； 所述协作 AP在确定自己的地址信息包括在所述联合发送请求消息中，且 自己具有参与所述联合发送的信道资源时， 则向所述 STA回复联合发送请求 确认消息， 以使得所述 STA根据所述联合发送请求确认消息确定所述参与联 合发送的 AP个数， 并将所述 AP个数包括在所述允许发送消息中；
所述根据所述允许发送消息向所述 STA发送数据， 包括： 所述协作 AP根 据所述允许发送消息中包括的所述参与联合发送的 AP个数， 按照与所述 AP 个数对应的联合发送协作模式， 向所述 STA发送数据。
11、 根据权利要求 10所述的方法， 其特征在于， 所述联合发送请求消息 或者联合发送请求确认消息是控制帧， 包括帧头和帧体；
所述帧头包括子类型字段 subtype, 所述帧体包括类别字段 category、 指不字段 indication禾口指不兀素字段 indication elements;
所述子类型字段 subtype的取值用于指示所述联合发送请求消息或者所 述联合发送请求确认消息是 HEW Indication帧； 所述类别字段 category的 取值用于表示联合发送指示，所述指示字段 indication的取值用于表示所述 控制帧是联合发送请求控制帧或者联合发送请求确认控制帧；
所述协作 AP的地址信息设置在所述指示元素字段 indication e l ement S o
12、 一种联合发送方法， 其特征在于， 包括：
终端 STA接收发起 AP发送的请求发送消息，所述请求发送消息中包括联 合发送指示、 以及预定参与所述联合发送的协作 AP的地址信息；
所述 STA根据所述联合发送指示， 向所述地址信息对应的协作 AP以及所 述发起 AP发送用于联合发送的允许发送消息；
所述 STA接收所述发起 AP和所述协作 AP在接收到所述允许发送消息后， 根据所述允许发送消息同时发送的数据。
13、 根据权利要求 12所述的方法， 其特征在于， 所述终端 STA接收发起 AP发送的请求发送消息之后， 向所述地址信息对应的协作 AP以及所述发起
AP发送允许发送消息之前， 还包括：
所述 STA向所述协作 AP发送联合发送请求消息，所述联合发送请求消息 是用于 STA询问所述协作 AP是否参与联合发送，所述 JTR帧中包括联合发送 指示、 以及所述预定参与所述联合发送的协作 AP的地址信息；
所述 STA接收所述协作 AP返回的联合发送请求确认消息，所述联合发送 请求确认消息是所述协作 AP在确定自己的地址信息包括在所述联合发送请 求消息中， 且自己具有参与所述联合发送的信道资源时发送的；
所述 STA根据所述联合发送请求确认消息确定参与联合发送的 AP个数， 并将所述 AP个数包括在所述允许发送消息中；
所述 STA接收所述发起 AP和所述协作 AP在接收到所述允许发送消息后， 根据所述允许发送消息同时发送的数据， 包括：
所述 STA接收所述发起 AP和协作 AP在接收到所述允许发送消息后， 按 照与所述允许发送消息中包括的 AP个数对应的联合发送协作模式，同时向所 述 STA发送的数据。
14、 一种发起接入点 AP， 其特征在于， 包括：
信息收发单元， 用于向终端 STA发送用于联合发送的请求发送消息， 所 述请求发送消息中包括联合发送指示、 以及预定参与所述联合发送的协作 AP 的地址信息， 以使得所述 STA根据所述联合发送指示， 向所述地址信息对应 的协作 AP以及所述发起 AP发送用于联合发送的允许发送消息， 以使得所述 协作 AP根据所述允许发送消息向所述 STA发送数据； 以及， 接收所述允许发 送消息；
数据传输单元， 用于在所述信息收发单元接收到所述允许发送消息后， 根据所述允许发送消息向所述 STA发送数据， 实现与所述协作 AP同时向 STA 发送数据。
15、 根据权利要求 14所述的发起 AP， 其特征在于，
所述数据传输单元， 具体用于在所述信息收发单元接收到所述允许发送 消息间隔第一固定时间之后， 向所述 STA发送数据， 所述第一固定时间与第 二固定时间相同，所述第二固定时间是所述协作 AP向所述 STA发送数据时与 接收到所述允许发送消息间隔的时间。
16、 根据权利要求 15所述的发起 AP， 其特征在于，
所述数据传输单元，具体用于按照与参与所述联合发送的 AP个数对应的 联合发送协作模式， 向所述 STA发送数据。
17、 根据权利要求 16所述的发起 AP， 其特征在于，
所述信息收发单元， 还用于在接收到所述允许发送消息之前， 与所述协 作 AP之间交互联合发送通信模式信息，所述联合发送通信模式信息中包括不 同的 AP个数、 以及与所述 AP个数对应的联合发送协作模式。
18、 根据权利要求 14-17任一所述的发起 AP， 其特征在于， 所述请求发 送消息或者所述允许发送消息是控制帧， 包括帧头和帧体；
所述帧头包括子类型字段 subtype, 所述帧体包括类别字段 category、 指不字段 indication禾口指不兀素字段 indication elements; 所述子类型字段 subtype的取值用于指示所述请求发送消息或者所述允 许发送消息是 HEW Indication帧； 所述类别字段 category的取值用于表示 联合发送指示，所述指示字段 indication的取值用于表示所述控制帧是用于 联合发送的请求发送控制帧或者用于联合发送的允许发送控制帧；
所述协作 AP的地址信息设置在所述指示元素字段 indication e l ement S o
19、 根据权利要求 14-17任一所述的发起 AP， 其特征在于，
所述请求发送消息或者所述允许发送消息是控制帧， 所述控制帧通过帧 头的子类型字段 subtype的取值表示所述控制帧是用于联合发送的请求发送 控制帧或者用于联合发送的允许发送控制帧；
所述协作 AP的地址信息设置在所述帧头的接收地址字段 RA中。
20、 一种协作接入点 AP， 其特征在于， 包括：
信息收发单元， 用于接收终端 STA发送的允许发送消息， 所述允许发送 消息中包括联合发送指示、 以及参与联合发送的 AP的地址信息； 所述允许发 送消息是所述 STA在接收到发起 AP发送的请求发送消息后发送的；
信息处理单元， 用于根据所述允许发送消息中包括的联合发送指示， 判 断所述允许发送消息中的所述地址信息是否包括自己的地址信息且自己是否 具有参与所述联合发送的信道资源；
数据传输单元， 用于在所述信息处理单元的判断结果为是时， 根据所述 允许发送消息向 STA发送数据， 以实现与所述发起 AP同时向 STA发送数据。
21、 根据权利要求 20所述的协作 AP， 其特征在于，
所述信息收发单元， 还用于在接收终端 STA发送的允许发送消息之前， 接收所述 STA发送的联合发送请求消息， 所述联合发送请求消息是用于 STA 询问所述协作 AP是否参与联合发送，所述联合发送请求消息中包括联合发送 指示、 以及预定参与所述联合发送的协作 AP的地址信息；
所述信息处理单元， 还用于在确定自己的地址信息包括在所述联合发送 请求消息中， 且自己具有参与所述联合发送的信道资源时， 指示所述信息收 发单元向所述 STA回复联合发送请求确认消息， 以使得所述 STA根据所述联 合发送请求确认消息确定所述参与联合发送的 AP个数， 并将所述 AP个数包 括在所述允许发送消息中；
所述数据传输单元， 具体用于在接收到所述允许发送消息间隔第二固定 时间之后， 根据所述允许发送消息中包括的所述参与联合发送的 AP个数， 按 照与所述 AP个数对应的联合发送协作模式， 向所述 STA发送数据； 所述第二 固定时间与第一固定时间相同， 所述第一固定时间是所述发起 AP向所述 STA 发送数据时与接收到所述允许发送消息间隔的时间。
22、 根据权利要求 21所述的协作 AP， 其特征在于，
所述联合发送请求消息或者联合发送请求确认消息是控制帧， 包括帧头 和帧体；
所述帧头包括子类型字段 subtype, 所述帧体包括类别字段 category、 指不字段 indication禾口指不兀素字段 indication elements;
所述子类型字段 subtype的取值用于指示所述联合发送请求消息或者所 述联合发送请求确认消息是 HEW Indication帧； 所述类别字段 category的 取值用于表示联合发送指示，所述指示字段 indication的取值用于表示所述 控制帧是联合发送请求控制帧或者联合发送请求确认控制帧；
所述协作 AP的地址信息设置在所述指示元素字段 indication e l ement S o
23、 一种终端 STA， 其特征在于， 包括：
信息收发单元， 用于接收发起 AP发送的请求发送消息， 所述请求发送消 息中包括联合发送指示以及预定参与所述联合发送的协作 AP的地址信息； 以 及， 根据所述联合发送指示， 向所述地址信息对应的协作 AP以及所述发起 AP发送用于联合发送的允许发送消息；
数据接收单元， 用于接收所述发起 AP和所述协作 AP在接收到所述允许 发送消息后， 根据所述允许发送消息同时发送的数据。
24、 根据权利要求 23所述的 STA, 其特征在于，
所述信息收发单元， 还用于当所述协作 AP的信道资源是基于竞争得到 时， 向所述协作 AP发送联合发送请求消息， 所述联合发送请求消息是用于 STA询问所述协作 AP是否参与联合发送， 所述 JTR帧中包括联合发送指示、 以及所述预定参与所述联合发送的协作 AP的地址信息； 以及， 接收所述协作 AP返回的联合发送请求确认消息，所述联合发送请求确认消息是所述协作 AP 在确定自己的地址信息包括在所述联合发送请求消息中， 且自己具有参与所 述联合发送的信道资源时发送的；
还包括： 信息处理单元， 用于根据所述联合发送请求确认消息确定参与 联合发送的 AP个数， 并将所述 AP个数包括在所述允许发送消息中； 所述数据接收单元， 具体用于接收所述发起 AP和协作 AP在接收到所述 允许发送消息后，按照与所述允许发送消息中包括的 AP个数对应的联合发送 协作模式， 同时向所述 STA发送的数据。
PCT/CN2013/085981 2013-10-25 2013-10-25 联合发送方法和设备 WO2015058411A1 (zh)

Priority Applications (7)

Application Number Priority Date Filing Date Title
ES19174139T ES2910251T3 (es) 2013-10-25 2013-10-25 Procedimiento y dispositivo de transmisión conjunta
EP19174139.6A EP3588793B1 (en) 2013-10-25 2013-10-25 Method and device for joint transmission
CN201380076195.1A CN105247796B (zh) 2013-10-25 2013-10-25 联合发送方法和设备
PCT/CN2013/085981 WO2015058411A1 (zh) 2013-10-25 2013-10-25 联合发送方法和设备
EP13895902.8A EP3043486B1 (en) 2013-10-25 2013-10-25 Methods and devices for joint transmission in wireless lan
EP21209215.9A EP4016858A1 (en) 2013-10-25 2013-10-25 Method and device for joint transmission
CN201910477357.1A CN110212950B (zh) 2013-10-25 2013-10-25 联合发送方法和设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/085981 WO2015058411A1 (zh) 2013-10-25 2013-10-25 联合发送方法和设备

Publications (1)

Publication Number Publication Date
WO2015058411A1 true WO2015058411A1 (zh) 2015-04-30

Family

ID=52992166

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/085981 WO2015058411A1 (zh) 2013-10-25 2013-10-25 联合发送方法和设备

Country Status (4)

Country Link
EP (3) EP3588793B1 (zh)
CN (2) CN105247796B (zh)
ES (1) ES2910251T3 (zh)
WO (1) WO2015058411A1 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017012125A1 (zh) * 2015-07-23 2017-01-26 华为技术有限公司 无线接入点同步协作方法、设备及系统
CN109672492A (zh) * 2017-10-13 2019-04-23 华为技术有限公司 一种协同传输的方法、设备及系统
CN109873685A (zh) * 2017-12-05 2019-06-11 三星电子株式会社 电子设备和用于控制电子设备以进行联合传输的方法
CN111294090A (zh) * 2019-07-24 2020-06-16 展讯通信（上海）有限公司 多ap操作的反向触发系统以及接入点
WO2021233163A1 (zh) * 2020-05-21 2021-11-25 华为技术有限公司 联合传输方法及装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019040345A1 (en) * 2017-08-22 2019-02-28 Intel Corporation APPARATUS, SYSTEM AND METHOD FOR MULTIPLE ACCESS POINT (AP) CHANNEL (MACB) CHANNEL LINKAGE
KR20210142178A (ko) * 2019-03-28 2021-11-24 지티이 코포레이션 다수의 액세스 포인트 간의 공동 전송 조정
CN112188590A (zh) * 2019-07-01 2021-01-05 中兴通讯股份有限公司 多接入点辅助传输方法及装置
US20210022178A1 (en) * 2019-07-16 2021-01-21 Qualcomm Incorporated Coordinated access point (cap) transmissions to a single user
CN114501605B (zh) * 2022-01-21 2024-05-24 维沃移动通信有限公司 通信方法、装置、电子设备及存储介质
WO2024091480A1 (en) * 2022-10-26 2024-05-02 Ofinno, Llc Multi-ap transmission scheme selection

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102025403A (zh) * 2009-09-09 2011-04-20 华为技术有限公司 一种多点协作发射接收方法、设备及系统
CN102037713A (zh) * 2008-05-23 2011-04-27 诺基亚西门子通信公司 在具有分离mac架构的无线局域网中提供站关联和移动性
CN102340817A (zh) * 2010-07-21 2012-02-01 中兴通讯股份有限公司 多点协作方法及装置
CN103327621A (zh) * 2012-03-23 2013-09-25 华为技术有限公司 载波资源配置方法和演进型基站

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2465317B1 (en) * 2009-08-14 2014-08-06 BlackBerry Limited Frame structure and control signaling for downlink coordinated multi-point (comp) transmission
CN102740496B (zh) * 2012-07-30 2015-09-16 北京航空航天大学 一种系统能效优化的上行链路协作mac方法
EP3975650A1 (en) * 2012-11-08 2022-03-30 Interdigital Patent Holdings, Inc. A method and apparatus for sectorized operation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102037713A (zh) * 2008-05-23 2011-04-27 诺基亚西门子通信公司 在具有分离mac架构的无线局域网中提供站关联和移动性
CN102025403A (zh) * 2009-09-09 2011-04-20 华为技术有限公司 一种多点协作发射接收方法、设备及系统
CN102340817A (zh) * 2010-07-21 2012-02-01 中兴通讯股份有限公司 多点协作方法及装置
CN103327621A (zh) * 2012-03-23 2013-09-25 华为技术有限公司 载波资源配置方法和演进型基站

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3043486A4 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107736075A (zh) * 2015-07-23 2018-02-23 华为技术有限公司 无线接入点同步协作方法、设备及系统
WO2017012125A1 (zh) * 2015-07-23 2017-01-26 华为技术有限公司 无线接入点同步协作方法、设备及系统
CN107736075B (zh) * 2015-07-23 2020-04-21 华为技术有限公司 无线接入点同步协作方法、设备及系统
CN111556583B (zh) * 2015-07-23 2024-04-26 华为技术有限公司 无线接入点同步协作方法、设备及系统
CN111556583A (zh) * 2015-07-23 2020-08-18 华为技术有限公司 无线接入点同步协作方法、设备及系统
CN109672492B (zh) * 2017-10-13 2021-02-09 华为技术有限公司 一种协同传输的方法、设备及系统
CN109672492A (zh) * 2017-10-13 2019-04-23 华为技术有限公司 一种协同传输的方法、设备及系统
CN109873685A (zh) * 2017-12-05 2019-06-11 三星电子株式会社 电子设备和用于控制电子设备以进行联合传输的方法
WO2021013118A1 (zh) * 2019-07-24 2021-01-28 展讯通信（上海）有限公司 多ap操作的反向触发系统以及接入点
CN111294090B (zh) * 2019-07-24 2023-02-28 展讯通信（上海）有限公司 多ap操作的反向触发系统以及接入点
CN111294090A (zh) * 2019-07-24 2020-06-16 展讯通信（上海）有限公司 多ap操作的反向触发系统以及接入点
US11979861B2 (en) 2019-07-24 2024-05-07 Spreadtrum Communications (Shanghai) Co., Ltd. Reverse trigger system of multiple access point operation including common station, initializer AP and first coordinated AP, and access point
WO2021233163A1 (zh) * 2020-05-21 2021-11-25 华为技术有限公司 联合传输方法及装置

Also Published As

Publication number Publication date
CN110212950B (zh) 2021-06-29
EP3588793A1 (en) 2020-01-01
CN105247796B (zh) 2019-06-11
ES2910251T3 (es) 2022-05-12
EP4016858A1 (en) 2022-06-22
EP3043486A4 (en) 2016-10-12
EP3043486A1 (en) 2016-07-13
EP3588793B1 (en) 2022-03-02
EP3043486B1 (en) 2019-05-29
CN105247796A (zh) 2016-01-13
CN110212950A (zh) 2019-09-06

Similar Documents

Publication Publication Date Title
WO2015058411A1 (zh) 联合发送方法和设备
WO2019153756A1 (zh) 一种多接入点ap协调传输的方法以及相关装置
US10080238B2 (en) Distributed reservation contention access (DRCA) for wireless local area network (WLAN) carrier sense multiple access (CSMA) stations
US10827527B2 (en) Channel contention method and apparatus
WO2015169025A1 (zh) 并行数据传输处理方法、装置及计算机存储介质
WO2018040806A1 (zh) 传输业务数据的方法、接入点和站点
WO2016062135A1 (zh) 无线局域网络站点共享资源的方法及装置
KR102364587B1 (ko) 전이중 통신을 위한 미디어 액세스 제어
WO2015131358A1 (zh) 信道资源指示方法及装置
EP4274271A2 (en) Internet of vehicles data transmission method, transmission terminal and network side device
WO2015149294A1 (zh) 一种非授权频谱的使用方法和基站及终端
WO2015109438A1 (zh) 数据传输方法及装置
WO2015106417A1 (zh) 预留信道的方法及通信设备
CN111556583B (zh) 无线接入点同步协作方法、设备及系统
WO2015120577A1 (zh) 数据传输处理方法及装置
WO2015027414A1 (zh) 一种通信方法、站点及系统
WO2016145662A1 (zh) 上行多用户接入方法和装置
KR101913261B1 (ko) 무선통신시스템에서 신호 송수신 방법
WO2015109603A1 (zh) 竞争信道的方法和装置
US10491512B2 (en) Supporting packet query-response transactions at lower layer
WO2013064090A1 (zh) 数据传送方法和装置
Xu Establishment and Maintenance of D2D Communication

Legal Events

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

Ref document number: 13895902

Country of ref document: EP

Kind code of ref document: A1

REEP Request for entry into the european phase

Ref document number: 2013895902

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2013895902

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE