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Double-channel reservation access control method in mobile Ad Hoc network

An access control and dual-channel technology, which is applied in the direction of using the return channel for error prevention/detection, wireless communication, electrical components, etc., can solve problems such as concealment, and achieve the effect of improving transmission opportunities, good multi-access performance, and good compatibility

Inactive Publication Date: 2012-09-19
JINAN UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] For the defects and deficiencies of the prior art, the purpose of the present invention is to design a dual-channel reserved access control method in a mobile Ad Hoc network, which improves the network throughput under single-hop and multi-hop networks, and solves the problem of Problems with hidden terminals and exposed terminals

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  • Double-channel reservation access control method in mobile Ad Hoc network
  • Double-channel reservation access control method in mobile Ad Hoc network
  • Double-channel reservation access control method in mobile Ad Hoc network

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Embodiment

[0037] figure 1 As a sequence diagram of the present invention, the time on RCH and TCH is divided into time slots of equal length, called reservation time slot (RS) and data packet transmission time slot (TS), respectively. In the RS on the RCH, each node sends RTS or CTS packets for channel reservation, and then sends DATA in the TS on the TCH for ACK confirmation.

[0038]Each RS slot on the RCH includes NMS contention mini-slots (CMS), the sending time of RTS and CTS packets, and 2 short interframe spaces (SIFS), where SIFS generally includes signal round-trip propagation time, receiver Processing time, sending and receiving conversion time. SIFS (Short Interframe Space) is a fixed value in the 802.11 series of wireless LANs, which is the smallest inter-frame space, so the node using SIFS has the highest priority to access the wireless link; it is equal to the node switching from the sending state to the receiving state and can The time required for correct decoding, or ...

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Abstract

The invention discloses a double-channel reservation access control method in a mobile Ad Hoc network, comprising reservation slot selection, contention mini-slot selection and RTS / CTS handshaking, and packet data transmission and confirmation. The method improves network throughput under the single-hop network and multi-hop network, and simultaneously solves the hidden terminal and exposed terminal problems. Furthermore, the method provided by the invention can be realized on hardware.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a dual-channel reserved access control method in a mobile Ad Hoc network. Background technique [0002] The IEEE802.11DCF protocol provides distributed access control, and is one of the most concerned protocols in the research and application of MAC protocols in Ad Hoc networks. IEEE802.11 DCF is a MAC protocol based on the CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance) mechanism. The protocol adopts the mode of sharing a single channel, and completes the access process of distributed data services through the DATA-ACK two-way handshake or RTS-CTS-DATA-ACK four-way handshake mechanism. The four-way handshake mechanism basically solves the problem of hidden terminals and exposed terminals. terminal problem. At the same time, the collision of data packets in the shared single-channel mode is controlled through technologies such as carrier sense, collision a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04L1/16
Inventor 张多英刘凯
Owner JINAN UNIVERSITY
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