Novel multi-channel medium access control method of wireless sensing network

A technology of wireless sensor network and medium access control, which is applied in the direction of wireless network protocol, wireless communication, network topology, etc., can solve the problems of unfavorable network throughput and interference, increase network communication overhead, control channel dependence, etc., to avoid Effects of signal conflict, success rate improvement, and reliability improvement

Active Publication Date: 2010-12-22
山东普赛通信科技股份有限公司
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Problems solved by technology

In this way, the time slice can be effectively used, but in this way, the nodes need to exchange control information on the control channel before each communication to reserve the time slice, which increases the network communication overhead and the dependence on the control channel, which is not conducive to Networks improve throughput and rely on interference

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  • Novel multi-channel medium access control method of wireless sensing network
  • Novel multi-channel medium access control method of wireless sensing network
  • Novel multi-channel medium access control method of wireless sensing network

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Embodiment Construction

[0051] Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:

[0052] The hardware platform required by the present invention is a radio frequency chip supporting multi-channel communication, such as CC2420, CC2520, CC1100 and the like produced by TI. In the early stage of networking, all nodes in the wireless sensor network broadcast beacons on the control channel, and at the same time listen to the beacons on the listening channel regularly. Figure 5-8 is the send / listen data flow diagram.

[0053] This MAC protocol adopts the multi-channel communication mode of parallel negotiation. Each node uses its own MAC address as a seed, and generates a pseudo-random sequence according to a fixed pseudo-random sequence generator. The node switches between multiple channels according to this pseudo-random sequence, that is, switches channels once in each wake-up period. In this way, other nodes only need to know the MAC addr...

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Abstract

The invention discloses a novel multi-channel medium access control method of a wireless sensing network, comprising the following steps of extracting a clock, a physical address and superframe information from a received beacon; taking the extracted physical address as a seed by an arbitrary node which receives beacons of other nodes to obtain a pseudo random sequence and calculating channels located by other nodes according to the pseudo random sequence; acquiring an awakening time slice of a receiving party according to the extracted superframe information and carrying out random delay andsignal strength detection by the arbitrary node when the arbitrary node sends data to the receiving party. The invention enhances the reliability of the network, efficiently avoids signal conflict bydividing a large superframe into a plurality of small time slices, simultaneously realizes a mechanism that nodes with different superframe sizes are mutually communicated and also ensures that transmission of generated data is not influenced by utilizing the withdrawn mechanism after collision so as to realize successful current data communication.

Description

technical field [0001] The invention relates to a novel multi-channel medium access control method of wireless sensor network. Background technique [0002] Wireless sensor network (WSN) is a multi-hop self-organizing network system formed by a large number of inexpensive micro sensor nodes deployed in the monitoring area through wireless communication. In the multi-channel MAC communication protocol, many nodes in the network are scattered in different channels, which reduces the communication competition, especially the multi-channel MAC communication protocol negotiated in parallel, overcomes the bottleneck problem of the control channel and greatly improves the network throughput. and network immunity. In the multi-channel mac mechanism in the existing wireless sensor network, the entire network adopts a unique big slot (super frame), and the signal strength detection used is only realized by hardware, and there is no effective mechanism to avoid collision in software. ...

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Application Information

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IPC IPC(8): H04W28/16H04W80/02H04W84/18
Inventor 陈冬岩邵珠瑜秦绍华
Owner 山东普赛通信科技股份有限公司
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