Physical layer protocol data unit transmission method and device
A physical layer protocol and data unit technology, applied in the field of communication, can solve the problems that the receiving end cannot complete the switching of data processing state, large data processing delay, etc., and achieve the effect of less information overhead
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Embodiment approach 1
[0040] Such as image 3 As shown, in the first possible implementation mode, a frame extension (FE, frame extension) is added after the last OFDM symbol of the current transmission, in order to provide some extra time for the receiving end to process the received data. It can also be seen that in the last OFDM symbol, some of them are padding bits, which are padding in English. This part of the padding is the padding of the physical layer, that is, it does not participate in encoding and decoding. Therefore, the receiving end does not need to decode this part, saving the time required for data processing. In order to let the receiving end know where decoding should stop, the first possible implementation also proposes to indicate the payload length (payload length) of the user in the HE-SIGB.
[0041] The length of the Frame extension is a function of the current transmission bandwidth, MCS, number of streams, padding duration, and processing capability of the receiving end....
Embodiment approach 2
[0046] The second possible implementation manner and the first possible implementation manner are similar in nature. Such as Figure 4 As shown, the second possible implementation also proposes to add a signal extension (SE, signal extension, that is, a frame extension of a possible implementation) after the last OFDM symbol, in order to provide some additional time for the receiving end Processing for receiving data. It can be seen that the last OFDM symbol also includes a part of filling bits, that is, padding. The second possible implementation mode is called post-FEC padding, which is essentially padding of the physical layer and does not participate in encoding and decoding. The pre-FEC padding in the second possible implementation mode is different from the post-FEC padding. The pre-FEC padding needs to participate in encoding and decoding, and the receiving end needs to process a part of the padding in the same way as information bits.
[0047] Since the function of p...
Embodiment approach 3
[0052] Such as Figure 5 As shown, the third possible implementation mode is the same as the first and second possible implementation modes in that after the last OFDM symbol (OFDM Symbol), a section of Frame extension (signal extension, in Figure 5 It is recorded as frameext), the purpose is to provide some extra time for the receiving end to process the received data. The difference is that in the third possible implementation manner, this part of signal extension is optional, and can be set to 0 if necessary. At the same time, if Figure 5 As shown, the third possible implementation also proposes that the last OFDM symbol also includes a part of padding bits, that is, padding. The padding of the physical layer is recorded as PHY Padding and does not participate in encoding and decoding.
[0053] Since the function of PHY padding is also to prevent the receiving end from processing, it saves the time required to process data. Therefore, the sending end also needs to tell...
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