Data transmission method and device

A data transmission and data field technology, applied in the field of data transmission, can solve problems such as insufficient robustness of confirmation frames, affecting system throughput, slowing down of data frame transmission rate, etc.

Active Publication Date: 2017-03-15
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If an MCS with a high false alarm rate is used at the same time, the confirmation frame will not be robust enough; if an MCS with a low packet error rate is used at the same time, the transmission rate of the data frame will slow down, which will affect the system throughput.

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  • Data transmission method and device

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Embodiment Construction

[0230] In the embodiment of the present invention, a relatively simplified data packet for resource scheduling indication is designed in combination with the characteristics of the acknowledgment frame. Control frames like Acknowledgment (English abbreviation: ACK) frame and Block acknowledgment (BlockACK, English abbreviation: BA) frame have the following characteristics:

[0231] 1. A transmission mode with relatively high robustness is required. Generally, it needs to work under MCS with a low packet error rate. Since the frame length itself is small, the number of symbols required for transmission will not be large.

[0232] 2. If parameters such as the number of space-time streams and MCS are relatively fixed, the size of the resource block occupied by it may be relatively fixed, and no additional resources may be required to indicate the number of symbols it occupies.

[0233] Based on the above characteristics, the embodiment of the present invention designs the data pa...

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Abstract

The embodiment of the invention discloses a data transmission method, and the method is used for reducing the expenditure of a system. According to the embodiment of the invention, a data packet transmitted by an AP (access point) to a station STA comprises resource dispatching information and data field. The resource dispatching information comprises first indication information, and the first indication information indicates that the data field comprises a first time block and a second time block. The first time block and the second time block are respectively provided with an MAC frame, and respectively employ the same physical parameters of space-time stream for transmission. The station STA analyzes the MAC frames carried by the first and second time blocks. Therefore, the method achieves the transmission of different MAC frames at the same subband, improves the data interaction efficiency of the AP and the station STA, and reduces the expenditure of the system.

Description

technical field [0001] The invention relates to the communication field, in particular to a data transmission method and device. Background technique [0002] Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, English abbreviation: OFDM) is the basic transmission mode of current wireless communication, widely used in Long Term Evolution (Long Term Evolution, English abbreviation: LTE), global microwave interconnection access (Worldwide Interoperability for Microwave Access, English abbreviation: WiMAX), Wireless Fidelity (Wireless Fidelity, English abbreviation: WiFi) and other wireless communication systems. Not only that, OFDM is also further applied to fixed network transmission, such as optical fiber, copper twisted wire, cable and other transmission methods. The basic principle of OFDM is to compress the subcarrier spacing to the minimum within the allowable range of the orthogonality of the subcarriers. On the one hand, it can ensu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L27/26
CPCH04L5/0007H04L5/003H04L27/2601H04L5/00
Inventor 吴伟民于健郭宇宸杨讯刘乐
Owner HUAWEI TECH CO LTD
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