A medium access control method and system for nodes in a full-duplex wireless local area network
A medium access control, wireless local area network technology, applied in transmission system, wireless communication, duplex signal operation and other directions, can solve the problem of duplex opportunity FD-MAC cannot be used, FD-MAC throughput performance is not achieved, ignore duplex opportunity, etc. question
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Embodiment 1
[0097] Embodiment 1: The AP has the advantage of accessing the medium, and the AP preferentially accesses the medium
[0098] At the beginning, the system state is as follows Figure 8 As shown, the AP has a data packet sent to the Client 1 and Client 2 .
[0099] 1. The AP prepares to send a target client 1 The data packet, generate backoff count (backoff count), backoff count=x;
[0100] 2. The AP checks the transmission intent table and finds that the Client 1 There is a transmission intention, and the AP sets the backoff count to 0;
[0101] 3. The AP sends the data packet immediately, because the Client 1 There are also data packets sent to the AP, and the data packets sent by the AP can lead to a duplex data transmission, (because the Client 1 After sending the data packet, there is no transmission intention to the AP, and the Client will set "more data" to 0);
[0102] 4. After the data transmission is completed, the AP will update the transmission intention tab...
Embodiment 2
[0103] Embodiment 2: The AP does not have the advantage of accessing the medium, and the Client accesses the medium before the AP
[0104] At the beginning, the system state is as follows Figure 10 As shown, the AP has a data packet sent to the Client 1 and Client 2 .
[0105] 1. The AP prepares to send a target client 2 data packets, generate backoff count, backoffcount=x;
[0106] 2. The AP checks the transmission intent table and finds that the Client 2 There is no transmission intention, and the AP does not change the backoff count;
[0107] 3. The AP receives the 1 data packets, AP and Client establish duplex communication, (due to Client 1 After sending the data packet, there is still a transmission intention to the AP, and the Client will set "more data" to 1);
[0108] 4. After the data transmission is completed, the AP will update the transmission intention table, and then the system status is as follows Figure 10 shown.
Embodiment 3
[0109] Embodiment 3: AP uses POLL to inquire about the client's transmission intention
[0110] The system state at the beginning of the transfer is as follows Figure 12 As shown, Client 1 and Client 2 There are a large number of data packets sent to the AP, and the AP only sends them to the Client 1 There is a data packet, and one constructed by the AP is sent to the Client 1 POLL (with POLL 1 Indicates) has reached the head of the team.
[0111] 1. AP prepares to send POLL 1 ;
[0112] 2. AP sends POLL immediately 1 , due to Client 1 A data packet is sent to the AP, and the POLL sent by the AP can prompt the Client to 1 Initiate a transfer (because the Client 1 After sending the data packet, there is still a transmission intention to the AP, and the Client will set "more data" to 1);
[0113] 3. After the data transmission is completed, the AP will update the transmission intent table;
[0114] 4. After the AP sends POLL, it finds that none of the targets is a C...
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