Medium access control system and medium access control method in wireless packet network

Abstract

The invention discloses a medium access control system and a medium access control method in a wireless packet network, which mainly aim to solve the problem of the incapacity of an exposed terminal in concurrent communication in the prior art. The system comprises a medium access control module, a received signal resolving module, an antenna, a radio frequency front end, a digital-to-analogue converter, a modulation / coding module, a physical layer frame forming module, an analogue-to-digital converter, an MAC frame extraction module and a physical channel management module, wherein the medium access control module judges whether a channel is idle or not and whether a terminal is the exposed terminal or not in transmission, and if the channel is idle and the terminal is the exposed terminal, transmits an RTS frame and presets expected ACK frame detection according to a known frame; the received signal resolving module executes the expected frame detection, judges whether an ACK is received or not and executes expected frame removal to suppress inter-frame interference; and the MAC layer frame extraction module extracts an MAC layer frame from signals after the expected frame removal. The system and the method have the advantages of simple implementation, high communication concurrence, high network capacity and compatibility with a conventional IEEE 802.11 standard, and can be used for realizing a large-scale wireless self-organizing communication network.

Description

technical field [0001] The present invention relates to the field of wireless communication networks, in particular to a wireless packet network medium access control system and method realized through data link layer and physical layer cooperation, which are used to solve the problem of exposed terminals in wireless ad hoc networks and improve communication concurrency and network capacity. Background technique [0002] With the development of wireless communication technology and the popularization of wireless communication applications, ad hoc wireless packet networks composed of wireless communication devices with equal status, and wireless sensor networks connecting physical and computing environments have been more and more widely used. In this network called wireless Ad hoc, the medium access control protocol determines the actual performance and resource utilization efficiency of the network to a large extent. [0003] In the wireless Ad hoc network, the carrier sen...

AI Technical Summary

Problems solved by technology

The essence of this type of method is to strengthen the conditions that allow concurrent communication to occur, but the disadvantage is that concurrent communication and space multiplexing cannot be fully realized

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