Method used for data sending of subchannel-modulation mode and device

Abstract

The invention relates to a method used for data sending of a subchannel-modulation mode, comprising a DATA part for utilizing a first modulation coding mode to construct a first physical frame unit by a first MAC frame, a DATA part for utilizing a second modulation coding mode to construct a first physical frame unit by a second MAC frame, a combining structure for combining the first physical frame unit and the second physical frame unit into a physical frame unit, and a physical layer superframe, wherein, the first modulation coding mode is a modulation coding mode defined in 802.11a / g / n protocol; and the second modulation coding mode is a modulation coding mode based on the subchannel-modulation mode and the physical layer superframe is used for sending combining structures containing the physical frame units. The method not only can lead the currently-transmitted frame header to be read and understood by other subchannel-modulation mode sites, but also can lead the frame header to be read and understood by the 802.11a / g / n site, thus being capable of realizing forward compatibility of the existing 802.11a / g / n site to the subchannel-modulation mode sites in the transmission of the subchannel-modulation mode signals.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a method and a device for sending data in a sub-channel-modulation mode. Background technique [0002] Aiming at the deficiencies of 802.11a / g / n technology in physical layer data transmission and MAC (Media Access Control) access, a sub-channel-modulation technology and a physical layer superframe technology are proposed to improve the performance of WLAN respectively. Physical layer and MAC layer performance. In the description of the sub-channel-modulation technique, the sub-channel is the abbreviation of the sub-carrier channel in OFDM (Orthogonal Frequency Division Multiplexing). [0003] The sub-channel-modulation method technology is the technology that different sub-channels of OFDM symbols adopt different modulation methods according to different SNRs: high-order modulation is used in sub-channels with high SNR, and high-order modulation is used ...

AI Technical Summary

Problems solved by technology

[0006] (1) 802.11a / g / n stations will not be able to recognize such physical frames or physical frame units at all;

[0007] (2) Other stations using sub-channel-modulation will be able to know that the current physical frame or physical frame unit is transmitted using sub-channel-modulation, but cannot read the information of the frame header

[0008] Therefore, when the transmitting site directly uses sub-channel-modulated physical frames or physical frame units to transmit data, it can only be used to Transmission to any non-current communication station in the local area network, which will limit the use of sub-channel-modulation technology

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