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WO2015062270A1 - Procédé de communications sans fil et dispositif de communications sans fil - Google Patents

Procédé de communications sans fil et dispositif de communications sans fil Download PDF

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Publication number
WO2015062270A1
WO2015062270A1 PCT/CN2014/079261 CN2014079261W WO2015062270A1 WO 2015062270 A1 WO2015062270 A1 WO 2015062270A1 CN 2014079261 W CN2014079261 W CN 2014079261W WO 2015062270 A1 WO2015062270 A1 WO 2015062270A1
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WIPO (PCT)
Prior art keywords
message frame
frame
wireless communication
terminals
terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/079261
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English (en)
Chinese (zh)
Inventor
董贤东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Dongguan Yulong Telecommunication Technology Co Ltd
Original Assignee
Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Dongguan Yulong Telecommunication Technology Co Ltd
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Filing date
Publication date
Application filed by Yulong Computer Telecommunication Scientific Shenzhen Co Ltd, Dongguan Yulong Telecommunication Technology Co Ltd filed Critical Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Publication of WO2015062270A1 publication Critical patent/WO2015062270A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a wireless communication method and a wireless communication device. Background technique
  • the efficiency of the MAC (Medium Access Control) layer is proportional to the throughput of the MAC layer, in order to improve the efficiency of the MAC layer, it is necessary to increase the throughput of the MAC.
  • the factors affecting the throughput of the MAC layer are:
  • DIFS distributed (coordination function) interframe space
  • SIFS short interframe space
  • RTS request to send, request to send message frame
  • CTS clear to send message frame
  • the fixed overhead in the access delay of the transmission opportunity corresponding to STA2 includes: the time of transmitting the RTS and CTS twice, respectively.
  • the above fixed overhead occupies the time period that is originally used by STA2 to transmit data frames/aggregated data frames (MPDU/A-MPDUs), but cannot be used for STA2 to perform real data transmission, but is counted in the entire BSS. In throughput, the effective throughput of the BSS is reduced. Summary of the invention
  • the invention is based on the above problems, and proposes a new wireless communication technology, which can be shortened
  • the fixed time overhead of the STA during transmission increases the efficiency of the valid data of the MAC layer and the throughput within the area.
  • the present invention provides a wireless communication method, including: generating a message frame, where the message frame includes at least one or more identifiers of the terminals, and the identifier of each of the terminals corresponds to one or more transmission opportunities. And the one or more transmission opportunities are used for data communication between the corresponding terminal and the sender of the message frame, and the one or more terminals correspond to all the transmission opportunities that have been allocated; and the message frame is sent.
  • the AP may allocate the transmission opportunity that needs to be allocated to all the terminals in advance, and then broadcast all the allocated transmission opportunities to all the connected terminals through one message frame, so that the terminals do not need to be in contact with each other.
  • competition data communication with the AP can be realized according to the transmission opportunity that is allocated by itself. Since the transmission opportunities of all terminals are allocated in advance, there is no need to generate competition between the terminals, which reduces the overhead caused by the competition, thereby improving the efficiency of the MAC layer and improving the throughput of the entire BSS.
  • one or more corresponding transmission opportunities may be allocated; and in the case of using the directional antenna for the AP, the same transmission opportunity may also be allocated to multiple terminals.
  • the identifier of each of the terminals includes: a media access control address and/or an association identifier (AID) of the corresponding terminal.
  • the corresponding terminal in the technical solution, in the BSS (Basic Service Set), only one AP and one or more terminals communicating with the AP exist, and the MAC address and/or AID of each terminal may be adopted. This indicates the transmission opportunity assigned to the terminal.
  • the OBSS Overlapping Basic Service Set
  • the corresponding terminal can be uniquely specified by the MAC address of each terminal.
  • the method further includes: the identifier of the one or more terminals includes one or more bits of a frame header portion or a frame body portion of the media access control frame of the packet, the frame, and the frame.
  • the identifier of the terminal may be placed by using one or more reserved bits of the frame header or the frame body portion of the MAC frame.
  • the method further includes: the identifier of the one or more terminals includes one or more bits in an order domain of a frame body portion of the medium access control frame.
  • the reserved bit may be located in the order domain of the frame body part of the MAC frame. For example, it can appear in the form of IE and is placed in a certain order domain of the frame body.
  • each of the transmission opportunities includes at least a time interval of the service and a start time, or at least a start time and an end time.
  • the transmission opportunity is a time window
  • multiple STAs use different time windows to perform data communication with the AP, or use the same time window to perform data communication with the AP in different areas.
  • the terminal receiving the message frame can accurately know the transmission opportunity that is allocated by itself.
  • the data communication process with the AP is started in time, which helps to improve spectrum utilization and regional throughput.
  • the method further includes: the message frame is a broadcast message frame, a multicast message frame, or a unicast message frame.
  • the message frame may be sent in different manners such as broadcast, multicast, unicast, etc.
  • the broadcast message frame includes the MAC address of all terminals to which the transmission opportunity is allocated. And/or AID, and a transmission opportunity corresponding to each terminal;
  • the message frame is a multicast message frame, the multicast message frame includes a MAC address of all terminals in a certain group to which a transmission opportunity is allocated and/or Or AID, and a transmission opportunity corresponding to each terminal;
  • the message frame is a unicast message frame, the unicast message frame includes a specific terminal MAC address and/or AID, and corresponding to the terminal Send an opportunity.
  • the method further includes: the broadcast message frame or the multicast message frame is a beacon frame.
  • the broadcast message frame or the multicast message frame may be a beacon frame, or other types of message frames.
  • a wireless communication device including: a data processing module, generating a message frame, where the message frame includes at least one or more identifiers of the terminals, and the identifier of each of the terminals corresponds to And one or more transmission opportunities, wherein the one or more transmission opportunities are used for data communication between the corresponding terminal and the wireless communication device, and the one or more terminals correspond to all the transmission opportunities that have been allocated; data interaction Module, sending the message frame.
  • the wireless communication device may be an AP
  • the data processing module may be a chip module for data processing in the wireless communication device
  • the data interaction module is equivalent to a signal transmitting and receiving device and an antenna.
  • the AP can allocate the transmission opportunities that need to be allocated to all the terminals in advance, and then broadcast all the allocated transmission opportunities to all the connected terminals through one message frame, so that there is no need for competition between the terminals, and the AP can be based on itself.
  • the assigned transmission opportunity communicates with the AP. Since the transmission opportunities of all terminals are allocated in advance, there is no need to generate competition between the terminals, which reduces the overhead caused by the competition, thereby improving the efficiency of the MAC layer and thereby improving the throughput of the entire BSS.
  • one or more corresponding transmission opportunities may be allocated; and in the case of using the directional antenna for the AP, the same transmission opportunity may also be allocated to multiple terminals.
  • the identifier of each of the terminals includes: a media access control address and/or an association identifier (AID) of the corresponding terminal.
  • the corresponding terminal in the technical solution, in the BSS (Basic Service Set), only one AP and one or more terminals communicating with the AP exist, and the MAC address and/or AID of each terminal may be adopted. This indicates the transmission opportunity assigned to the terminal.
  • the OBSS Overlapping Basic Service Set
  • the corresponding terminal can be uniquely specified by the MAC address of each terminal.
  • the identifier of the one or more terminals includes one or more bits of a frame header portion or a frame body portion of the media access control frame of the frame.
  • the identifier of the terminal may be placed by using one or more reserved bits of the frame header or the frame body portion of the MAC frame.
  • the identifier of the one or more terminals includes one or more bits in an order domain of a frame body portion of the medium access control frame.
  • the reserved bit may be located in the order domain of the frame body part of the MAC frame. For example, it can appear in the form of IE and is placed in a certain order domain of the frame body.
  • each of the transmission opportunities includes at least a time interval of the service and a start time, or at least a start time and an end time.
  • the transmission opportunity is a time window
  • multiple STAs use different time windows to perform data communication with the AP, or use the same time window to perform data communication with the AP in different areas.
  • the terminal receiving the message frame can accurately know the transmission opportunity that is allocated by itself.
  • the data communication process with the AP is started in time, which helps to improve spectrum utilization and regional throughput.
  • the message frame is a broadcast message frame, a multicast message frame or a unicast message frame.
  • the message frame may be sent in different manners such as broadcast, multicast, unicast, etc.
  • the broadcast message frame includes the MAC address of all terminals to which the transmission opportunity is allocated. And/or AID, and a transmission opportunity corresponding to each terminal;
  • the message frame is a multicast message frame, the multicast message frame includes a MAC address of all terminals in a certain group to which a transmission opportunity is allocated and/or Or AID, and a transmission opportunity corresponding to each terminal;
  • the message frame is a unicast message frame, the unicast message frame includes a specific terminal MAC address and/or AID, and corresponding to the terminal Send an opportunity.
  • the broadcast message frame or the multicast message frame is a beacon frame.
  • the broadcast message frame or the multicast message frame may be a beacon frame, or other types of message frames.
  • the present invention also provides a wireless communication method, including: receiving a message frame, where the message frame includes at least one or more terminal identifiers, and each of the terminal identifiers corresponds to one or more Transmitting opportunities, the one or more transmission opportunities are used for data communication between the corresponding terminal and the sender of the message frame, and the one or more terminals correspond to all the transmission opportunities that have been allocated; according to the message
  • the identifier of the recipient of the frame determines a corresponding one or more transmission opportunities for data communication with the sender of the message frame.
  • the AP may allocate the transmission opportunity that needs to be allocated to all the terminals in advance, and then broadcast all the allocated transmission opportunities to all the connected terminals through one message frame, so that the terminals do not need to be in contact with each other.
  • competition data communication with the AP can be realized according to the transmission opportunity that is allocated by itself. Since the transmission opportunities of all terminals are allocated in advance, there is no need to generate competition between the terminals, which reduces the overhead caused by the competition, thereby improving the efficiency of the MAC layer and improving the throughput of the entire BSS.
  • one or more corresponding transmission opportunities may be allocated; and in the case of using the directional antenna for the AP, the same transmission opportunity may also be allocated to multiple terminals.
  • the method further includes: when the first transmission opportunity is included in the one or more transmission opportunities corresponding to the receiver of the message frame, the receiver corresponding to the first transmission opportunity is in use Sending a request to send a message frame (RTS) to the sender of the message frame, and receiving a returned clear send message frame (CTS), wherein the request is sent, before the sender communicates with the sender of the message frame
  • RTS message frame
  • CTS clear send message frame
  • each terminal needs to confirm whether the current channel is occupied by sending an RTS when using a certain transmission opportunity to interact with the AP, if the terminal does not receive within a predetermined time.
  • the current channel is occupied, for example, by a hidden node, the terminal will choose to stop using the current transmission opportunity to communicate with the AP.
  • the terminal that establishes a communication connection with the AP using the first transmission opportunity needs to avoid the signal being occupied, and other subsequent terminals can directly follow the self.
  • the assigned transmission opportunities are closely connected, so that hidden nodes and the like cannot utilize the gap between the two transmission opportunities (in this case, the minimum gap SIFS) to "preempt" the current transmission opportunity, so that subsequent terminals need not pass through
  • the RTS is sent and the CTS is received to detect the current channel, so that the length of time actually used for data communication is extended, thereby improving the efficiency of the MAC layer.
  • the identifier of each of the terminals includes: a media access control address and/or an association identifier (AID) of the corresponding terminal.
  • the corresponding terminal in the technical solution, in the BSS (Basic Service Set), only one AP and one or more terminals communicating with the AP exist, and the MAC address and/or AID of each terminal may be adopted. This indicates the transmission opportunity assigned to the terminal.
  • the OBSS Overlapping Basic Service Set
  • the corresponding terminal can be uniquely specified by the MAC address of each terminal.
  • the method further includes: the identifier of the one or more terminals includes one or more bits of a frame header portion or a frame body portion of the media access control frame of the packet, the frame, and the frame.
  • the identifier of the terminal may be placed by using one or more reserved bits of the frame header or the body portion of the MAC frame.
  • the method further includes: the identifier of the one or more terminals includes one or more bits in an order domain of a frame body portion of the medium access control frame.
  • the reserved bit may be located in the order domain of the frame body part of the MAC frame. For example, it can appear in the form of IE and is placed in a certain order domain of the frame body.
  • each of the transmission opportunities includes at least a time interval of the service and a start time, or at least a start time and an end time.
  • the transmission opportunity is a time window
  • multiple STAs use different time windows to perform data communication with the AP, or use the same time window to perform data communication with the AP in different areas.
  • the terminal receiving the message frame can accurately know the transmission opportunity that is allocated by itself.
  • the data communication process with the AP is started in time, which helps to improve spectrum utilization and regional throughput.
  • the method further includes: the message frame is a broadcast message frame, a multicast message frame, or a unicast message frame.
  • the message frame may be sent in different manners such as broadcast, multicast, unicast, etc.
  • the broadcast message frame includes the MAC address of all terminals to which the transmission opportunity is allocated. And/or AID, and a transmission opportunity corresponding to each terminal;
  • the message frame is a multicast message frame, the multicast message frame includes a MAC address of all terminals in a certain group to which a transmission opportunity is allocated and/or Or AID, and a transmission opportunity corresponding to each terminal;
  • the message frame is a unicast message frame, the unicast message frame includes a specific terminal MAC address and/or AID, and corresponding to the terminal Send an opportunity.
  • the method further includes: the broadcast message frame or the multicast message frame is a beacon frame.
  • the broadcast message frame or the multicast message frame may be a beacon frame, or other types of message frames.
  • the present invention further provides a wireless communication device, comprising: a data interaction module, receiving a message frame, wherein the message frame includes at least one or more terminal identifiers, and each of the terminal identifiers corresponds to one or more transmissions.
  • a data interaction module receiving a message frame, wherein the message frame includes at least one or more terminal identifiers, and each of the terminal identifiers corresponds to one or more transmissions.
  • Opportunity the one or more transmission opportunities are used for data communication between the corresponding terminal and the sender of the message frame, and the one or more terminals correspond to all the transmission opportunities that have been allocated; the data processing module, according to the Determining an identity of the wireless communication device, determining a corresponding one or more transmission opportunities for data communication with a sender of the message frame.
  • the wireless communication device may be a STA
  • the data processing module may be a chip module for data processing in the wireless communication device
  • the data interaction module is equivalent to a signal transceiving device and an antenna.
  • the AP can allocate the transmission opportunities that need to be allocated to all the terminals in advance, and then broadcast all the allocated transmission opportunities to all the connected terminals through one message frame, so that there is no need for competition between the terminals, and the AP can be based on itself.
  • the assigned transmission opportunity communicates with the AP. Since the transmission opportunities of all terminals are allocated in advance, there is no need to generate competition between the terminals, which reduces the overhead caused by the competition, thereby improving the efficiency of the MAC layer and thereby improving the throughput of the entire BSS.
  • the data interaction module is further configured to: when the first transmission opportunity is included in one or more transmission opportunities corresponding to the receiver of the message frame, use the first transmission Before the opportunity to communicate with the sender of the message frame, send a request to send a message frame (RTS) to the sender of the message frame, and receive a returned clear send message frame (CTS), where the request sends a message frame And the clearing of the sent message frame includes the duration of all the allocated transmission opportunities.
  • RTS message frame
  • CTS clear send message frame
  • each terminal needs to confirm whether the current channel is occupied by sending an RTS when using a certain transmission opportunity to interact with the AP, if the terminal does not receive within a predetermined time.
  • the current channel is occupied, for example, by a hidden node, the terminal will choose to stop using the current transmission opportunity to communicate with the AP.
  • the terminal that establishes a communication connection with the AP using the first transmission opportunity needs to avoid the signal being occupied, and other subsequent terminals can directly follow the self.
  • the assigned transmission opportunities are closely connected, so that a hidden node or the like cannot utilize the gap between the two transmission opportunities (in this case, the minimum gap SIFS) to "preempt" the current transmission opportunity, so that subsequent terminals need not be sent.
  • the RTS and the receiving CTS detect the current channel, which extends the length of time actually used for data communication, thereby improving the efficiency of the MAC layer.
  • the identifier of each of the terminals includes: a media access control address and/or an association identifier (AID) of the corresponding terminal.
  • the corresponding terminal in the technical solution, in the BSS (Basic Service Set), only one AP and one or more terminals communicating with the AP exist, and the MAC address and/or AID of each terminal may be adopted. This indicates the transmission opportunity assigned to the terminal.
  • the OBSS Overlapping Basic Service Set
  • the corresponding terminal can be uniquely specified by the MAC address of each terminal.
  • the identifier of the one or more terminals includes the The media access control of the frame controls the frame header portion of the frame or one or more bits of the frame body portion.
  • the identifier of the terminal may be placed by using one or more reserved bits of the frame header or the frame body portion of the MAC frame.
  • the identifier of the one or more terminals includes one or more bits in an order domain of a frame body portion of the media access control frame.
  • the reserved bit may be located in the order domain of the frame body part of the MAC frame. For example, it can appear in the form of IE and is placed in a certain order domain of the frame body.
  • each of the transmission opportunities includes at least a time interval of the service and a start time, or at least a start time and an end time.
  • the transmission opportunity is a time window
  • multiple STAs use different time windows to perform data communication with the AP, or use the same time window to perform data communication with the AP in different areas.
  • the terminal receiving the message frame can accurately know the transmission opportunity that is allocated by itself.
  • the data communication process with the AP is started in time, which helps to improve spectrum utilization and regional throughput.
  • the message frame is a broadcast message frame, a multicast message frame or a unicast message frame.
  • the message frame may be sent in different manners such as broadcast, multicast, unicast, etc.
  • the broadcast message frame includes the MAC address of all terminals to which the transmission opportunity is allocated. And/or AID, and a transmission opportunity corresponding to each terminal;
  • the message frame is a multicast message frame, the multicast message frame includes a MAC address of all terminals in a certain group to which a transmission opportunity is allocated and/or Or AID, and a transmission opportunity corresponding to each terminal;
  • the message frame is a unicast message frame, the unicast message frame includes a specific terminal MAC address and/or AID, and corresponding to the terminal Send an opportunity.
  • the broadcast message frame or the multicast message frame is a beacon frame.
  • the broadcast message frame or the multicast message frame may be a beacon frame, or other class. Type of message frame.
  • FIG. 1 is a timing chart showing a transmission opportunity corresponding to a plurality of STAs in the related art
  • FIG. 2 is a flowchart showing a sender-based wireless communication method according to an embodiment of the present invention
  • FIG. 3 is a flow chart showing a receiver-based wireless communication method according to an embodiment of the present invention.
  • FIG. 4 is a block diagram showing the structure of a message frame according to an embodiment of the present invention.
  • FIG. 5 is a timing diagram showing transmission opportunities corresponding to a plurality of STAs according to an embodiment of the present invention
  • Figure 6 shows a schematic block diagram of a sender and a receiver in accordance with an embodiment of the present invention. detailed description
  • FIG. 2 shows a flowchart of a sender-based wireless communication method according to an embodiment of the present invention
  • FIG. 3 shows an implementation according to the present invention.
  • the sender-based wireless communication method includes: Step 202: Generate a message frame, where the message frame includes at least one or more identifiers of the terminals, and each of the terminals The identifier corresponds to one or more transmission opportunities, and the one or more transmission opportunities are used for data communication between the corresponding terminal and the sender of the message frame, and the one Or multiple terminals correspond to all the transmission opportunities that have been allocated; Step 204, the message frame is sent. Meanwhile, as shown in FIG.
  • a receiver-based wireless communication method includes: receiving a message frame, where the message frame includes at least one or more terminal identifiers, and each of the terminals The identifier corresponds to one or more transmission opportunities, the one or more transmission opportunities are used for data communication between the corresponding terminal and the sender of the message frame, and the one or more terminals correspond to all the transmitted transmissions Opportunity; determining, according to the identifier of the recipient of the message frame, a corresponding one or more transmission opportunities for data communication with a sender of the message frame.
  • the AP may allocate the transmission opportunity that needs to be allocated to all the terminals in advance, and then broadcast all the allocated transmission opportunities to all the connected terminals through one message frame, so that the terminals do not need to be in contact with each other.
  • competition data communication with the AP can be realized according to the transmission opportunity that is allocated by itself. Since the transmission opportunities of all terminals are allocated in advance, there is no need to generate competition between the terminals, which reduces the overhead caused by the competition, thereby improving the efficiency of the MAC layer and improving the throughput of the entire BSS.
  • one or more corresponding transmission opportunities may be allocated; and in the case of using the directional antenna for the AP, the same transmission opportunity may also be allocated to multiple terminals.
  • a HCCA TXOP Advertisement frame is transmitted by transmitting, for example, a hybrid coordination function controlled channel access (HCCA), and is in the message frame.
  • the transmitted opportunity (TXOP, Transmission opportunity) is reserved in the domain, and the specific transmission opportunity is set and sent to the configured terminal for use.
  • FIG. 4 shows a schematic structural diagram of a message frame according to an embodiment of the present invention.
  • the "transmission opportunity reserved field” in the related art is evolved into "A-TXOP, Aggregate, Transmission opportunity", .
  • the A-TXOP can be set in a message frame in the form of an information element as shown in FIG.
  • the A-TXOP in addition to “information element identification” and “length”, it also includes an aggregate transmission opportunity subfield, which includes different transmission opportunities such as "TXOP1", “TXOP2", ...
  • TXOPn In order to establish an association between the transmission opportunity and the specifically assigned terminal, it indicates that the transmission opportunity is assigned to the terminal, and each transmission opportunity (in FIG. 4, specifically ⁇ is taken as an example, each of the other ⁇ The structure is the same, no longer detailed.) In addition to: “Duration”, “Service Interval”, “Start Time”, it also specifically indicates the assigned The identifier of the terminal, where the identifier of the terminal may specifically be a medium access control address and/or an associated identifier (AID) of the terminal.
  • AID associated identifier
  • the corresponding terminal in the technical solution, in the BSS (Basic Service Set), only one AP and one or more terminals communicating with the AP exist, and the MAC address and/or AID of each terminal may be adopted. This indicates the transmission opportunity assigned to the terminal.
  • the OBSS Overlapping Basic Service Set
  • the corresponding terminal can be uniquely specified by the MAC address of each terminal.
  • the identifier of one or more terminals in the A-TXOP may include one or more of a frame header portion or a frame body portion of the medium access control frame of the message frame in which the A-TXOP is set. Single digit.
  • the identifier of the one or more terminals may include one or more bits in an order domain of a frame body portion of the medium access control frame.
  • the identifier of the terminal may be placed by using one or more reserved bits of the frame header or the body portion of the MAC frame.
  • the reserved bit may be located in the order domain of the frame body part of the MAC frame, for example, may be in the IE The form appears and is placed in a certain order domain of the frame body.
  • each of the sending opportunities includes at least a time interval of the service and a start time, or at least a start time and an end time.
  • the transmission opportunity is a time window, and multiple STAs use different time windows to perform data communication with the AP, or use the same time window to perform data communication with the AP in different areas.
  • the method further includes: the message frame is a broadcast message frame, a multicast message frame, or a unicast message frame.
  • the message frame may be sent in different manners such as broadcast, multicast, unicast, etc.
  • the broadcast message frame includes the MAC address of all terminals to which the transmission opportunity is allocated. And/or AID, and a transmission opportunity corresponding to each terminal;
  • the message frame is a multicast message frame, the multicast message frame includes a MAC address of all terminals in a certain group to which a transmission opportunity is allocated and/or Or AID, and a transmission opportunity corresponding to each terminal;
  • the message frame is a unicast message frame, the unicast message frame includes a specific terminal MAC address and/or AID, and corresponding to the terminal Send an opportunity.
  • the method further includes: the broadcast message frame or the multicast message frame is a beacon frame.
  • the broadcast message frame or the multicast message frame may be a beacon frame, or other types of message frames.
  • the definition of the existing beacon frame body in the related art needs to be expanded to the case shown in Table 1 below:
  • the receiving STA can use the transmission opportunity included in the received message frame to perform transmission communication with the sender AP in an accurate and timely manner, and can also shorten the fixed overhead. time.
  • the STA needs to send the RTS and receive the CTS returned by the AP, so as to detect whether there are other STAs in the current channel, especially to avoid that the hidden nodes existing around are occupied. For the current channel, if the STA that sends the RTS still uses the current transmission opportunity, the data may not be transmitted normally.
  • the AP provides services for STA1, STA2, STA3, etc., and the transmission opportunities are allocated in advance, for example, STA1 uses the transmission opportunity 1, STA2 uses the transmitter 2, STA3 uses the transmission opportunity 3, and the like.
  • the transmission opportunity 1 used by STA1 is the first transmission opportunity, that is, there is a period of idle time, so that other hidden channels, etc. may preempt the corresponding channel, so it is necessary for STA1 to send the RTS and receive the CTS returned by the AP to confirm the current.
  • the real data transmission is performed after the channel is not occupied, wherein the "Duration" sub-domain of the RTS and CTS contains the duration of the transmission opportunity corresponding to all STAs to which the transmission opportunity has been allocated, thereby protecting all
  • the STA that has been assigned the transmission opportunity uses the data transmission process performed by the corresponding transmission opportunity.
  • Figure 6 shows a schematic block diagram of a sender and a receiver in accordance with an embodiment of the present invention.
  • the sender communication device 600 includes: a first data processing module 602, configured to generate a message frame, where the message frame includes at least one or more terminal identifiers, each The identifier of the terminal corresponds to one or more transmission opportunities, and the one or more transmission opportunities are used for data communication between the corresponding terminal and the sender wireless communication device 600, and the one or more terminals correspond to All the transmission opportunities that have been allocated; the first data interaction module 604, transmitting the message frame.
  • the sender communication device 600 may be an AP
  • the first data processing module 602 may be a chip module for data processing in the sender communication device 600
  • the first data interaction module 604 is equivalent to a signal transceiver device and an antenna.
  • Wait. The AP can allocate the transmission opportunities that need to be allocated to all the terminals in advance, and then broadcast all the allocated transmission opportunities to all the connected terminals through one message frame, so that there is no need for competition between the terminals, and the AP can be based on itself.
  • the assigned transmission opportunity communicates with the AP. Since the transmission opportunities of all terminals are allocated in advance, there is no need to generate competition between the terminals, which reduces the overhead brought by the competition, thereby improving the efficiency of the MAC layer and improving the throughput of the entire BSS.
  • one or more corresponding transmission opportunities may be allocated; and in the case of using the directional antenna for the AP, the same transmission opportunity may also be allocated to multiple terminals.
  • the receiver communication device 700 includes: a second data interaction module 702, configured to receive a message frame, where the message frame includes at least one or more identifiers of the terminals, and each of the terminals The identifier corresponds to one or more transmission opportunities, the one or more transmission opportunities are used for data communication between the corresponding terminal and the sender of the message frame, and the one or more terminals correspond to all the transmitted transmissions Opportunity; second data processing module 704, root Based on the identity of the recipient communication device 700, a corresponding one or more transmission opportunities are determined for data communication with the sender of the message frame.
  • the receiver communication device 700 may be a STA
  • the second data processing module 702 may be a chip module for data processing in the receiver communication device 700
  • the second data interaction module 704 is equivalent to a signal transceiver device and an antenna.
  • Wait. The AP can allocate the transmission opportunities that need to be allocated to all the terminals in advance, and then notify all the terminals of all the allocated transmission opportunities through one message frame, so that there is no need for competition between the terminals, and the transmission opportunities according to their own allocations can be obtained. , Data communication with the AP. Since the transmission opportunities of all the terminals are allocated in advance, there is no need to generate competition between the terminals, which reduces the overhead caused by the competition, thereby improving the throughput of the MAC layer and further improving the efficiency of the MAC layer.
  • each terminal including the receiving communication device 700
  • one or more corresponding transmission opportunities may be allocated; and for the AP to use the directional antenna, the same transmission opportunity may also be allocated to different regions. Multiple terminals.
  • the second data interaction module 704 is further configured to: when the first transmission opportunity is included in the one or more transmission opportunities corresponding to the receiver of the message frame, Sending a request to send a message frame (RTS) to the sender of the message frame and receiving a returned clear send message frame (CTS), wherein the request is sent before the first transmission opportunity communicates with the sender of the message frame.
  • RTS message frame
  • CTS clear send message frame
  • each terminal needs to send an RTS to confirm whether the current channel is used when using a certain transmission opportunity to interact with the AP. If the terminal does not receive the returned CTS within the predetermined time, it indicates that the current channel is occupied. For example, if it is occupied by a hidden node, the terminal will choose to stop using the current sending opportunity to perform data communication with the AP.
  • the terminal that establishes a communication connection with the AP using the first transmission opportunity needs to avoid the signal being occupied, and other subsequent terminals can directly follow the self.
  • the assigned transmission opportunities are closely connected, so that hidden nodes and the like cannot utilize the gap between the two transmission opportunities (in this case, the minimum gap SIFS) to "preempt" the current transmission opportunity, so that subsequent terminals need not pass through
  • the RTS is sent and the CTS is received to detect the current channel, so that the length of time actually used for data communication is extended, thereby improving the efficiency of the MAC layer.
  • the identifier of each of the terminals includes: a media access control address and/or an association identifier (AID) of the corresponding terminal.
  • the corresponding terminal in the technical solution, in the BSS (Basic Service Set), only one AP and one or more terminals communicating with the AP exist, and the MAC address and/or AID of each terminal may be adopted. This indicates the transmission opportunity assigned to the terminal.
  • the OBSS Overlapping Basic Service Set
  • the corresponding terminal can be uniquely specified by the MAC address of each terminal.
  • the identifier of the one or more terminals includes one or more bits of a frame header portion or a frame body portion of the media access control frame of the frame.
  • the identifier of the terminal may be placed by using one or more reserved bits of the frame header or the body portion of the MAC frame.
  • the identifier of the one or more terminals includes one or more bits in an order domain of a frame body portion of the media access control frame.
  • the reserved bit may be located in the order domain of the frame body part of the MAC frame. For example, it can appear in the form of IE and is placed in a certain order domain of the frame body.
  • each of the transmission opportunities includes at least a time interval of the service and a start time, or at least a start time and an end time.
  • the transmission opportunity is a time window
  • multiple STAs use different time windows to perform data communication with the AP, or use the same time window to perform data communication with the AP in different areas.
  • the terminal receiving the message frame can accurately know the transmission opportunity that is allocated by itself.
  • the data communication process with the AP is started in time, which helps to improve spectrum utilization and regional throughput.
  • the message frame is a broadcast message frame, a multicast message frame or a unicast message frame.
  • the message frame may be sent in different manners such as broadcast, multicast, unicast, etc.
  • the broadcast message frame includes the MAC address of all terminals to which the transmission opportunity is allocated. And/or AID, and a transmission opportunity corresponding to each terminal;
  • the message frame is a multicast message frame, the multicast message frame includes a MAC address of all terminals in a certain group to which a transmission opportunity is allocated and/or Or AID, and a transmission opportunity corresponding to each terminal;
  • the message frame is a unicast message frame, the unicast message frame includes a specific terminal MAC address and/or AID, and corresponding to the terminal Send an opportunity.
  • the broadcast message frame or the multicast message frame is a beacon frame.
  • the broadcast message frame or the multicast message frame may be a beacon frame, or other types of message frames.
  • the present application proposes a wireless communication method. And a wireless communication device can shorten the fixed time overhead of the STA in the transmission process, improve the efficiency of the effective data of the MAC layer and the throughput in the area.

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

Abstract

La présente invention concerne un procédé de communications sans fil, comprenant les étapes suivantes : générer une trame de message, la trame de message comprenant au moins un identifiant d'un ou plusieurs terminaux, l'identifiant de chaque terminal correspondant à une ou plusieurs chances d'envoi, la ou les chances d'envoi étant utilisées pour la communication de données entre des terminaux correspondants et un expéditeur de la trame de message et le ou les terminaux correspondant à toutes les chances d'envoi distribuées; et envoyer la trame de message. La présente invention concerne en outre un dispositif de communications sans fil. Au moyen de la solution technique de la présente invention, le traitement à temps fixe d'un STA dans un processus de transmission peut être raccourci et l'efficacité de données valides dans une couche MAC et le débit dans une région sont améliorés.
PCT/CN2014/079261 2013-10-29 2014-06-05 Procédé de communications sans fil et dispositif de communications sans fil Ceased WO2015062270A1 (fr)

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CN105101432B (zh) * 2015-05-29 2018-09-14 珠海市魅族科技有限公司 一种无线通信方法及设备
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