Method for reducing media access collision of wireless local area network by cross-layer structure

Abstract

The invention relates to a method for reducing media access conflict of a wireless local area network through cross-layer architecture, belonging to the computer communication field. The method comprises two parts of processing of node interception messages and processing of transmitted messages during the process of message transmission; a sequence mark is set for each node; following status information is stored in various nodes: node sequence marks used for transmission of the prior message of the nodes, node sequence marks of messages intercepted lately and physical addresses of the node sequence marks; node interception reads corresponding control information for all received messages; and the status that whether a transmitting buffer of the node is empty and a transmitting node sequence mark which is represented by a nonnegative integer are added into a message header during the process of packaging the messages into frames. The method fully utilizes the status information of the various nodes in the network through the cross-layer architecture to reduce the probability of the conflict in a small-scale wireless local area network and then further achieve the aim of improving the message capacity in the wireless local area network.

Description

technical field [0001] The invention belongs to the field of computer communication, in particular to the communication in the wireless packet network, and relates to the problem of conflict avoidance and communication capacity improvement in medium and small-scale wireless local area networks accessed by shared media. Background technique [0002] Wireless local area network (abbreviated as WLAN) is a short-distance wireless packet data communication technology, which is suitable for providing network access services for mobile terminals in public places such as libraries and airports, or in environments where wiring is not possible. The establishment of a communication network has strong flexibility and broad application prospects. [0003] Currently, the wireless local area network technologies adopted in China are mainly technical standards such as the physical layer and media access control formulated in the IEEE802.11 series standards. In terms of media access control...

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Problems solved by technology

[0007]In the traditional network architecture design, in order to simplify the function design, the structure of layered design is generally adopted, such as the OSI7-layer model and TCP / IP architecture, these layers The design of the packet network played an important role in the early days, but with the development of modern network technology, especially wireless networks, the limitations of layered design gradually emerged, and the isolated design between layers affected the further development of network technology , in this context, the idea of ​​cross-layer design is gradually accepted by designers and has become a hot spot in modern wireless network research

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