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Traffic-adapted radio sensor network channel access control method

A channel access control and wireless sensor technology, applied in the field of multi-hop wireless sensor networks, can solve the problems of inability to adaptively adjust the delay, unmet real-time requirements, etc. Effect

Inactive Publication Date: 2007-09-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In short, most of the current competition-based wireless sensor network MAC protocols sacrifice time delay for energy saving. Sexual needs are not met

Method used

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  • Traffic-adapted radio sensor network channel access control method
  • Traffic-adapted radio sensor network channel access control method
  • Traffic-adapted radio sensor network channel access control method

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The technical scheme of the present invention will be further described below in conjunction with accompanying drawings and embodiments.

[0019] In an embodiment of the present invention, the scene is a linear multi-hop topology composed of 11 nodes, the first node is a source node, and the last node is a sink node. An ideal route is adopted in the simulation, and an optimal route is calculated based on global information. In the simulation, the interval at which the source node generates packets is varied from 1 second to 15 seconds to represent the change of traffic in the network. In each flow condition, 10 independent simulations were performed, and the average value was calculated as the final result. The simulation time is 1000 seconds. Some other important simulation parameters are shown in Table 1.

[0020] control packet length

10bytes

Slot Length (Slot Time)

1ms

Sync frame contention window size

(SYNC_CW)

31 slots

...

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PUM

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Abstract

This invention relates to a method of flowing of wireless sensor networks Adaptive Channel Access control, being the same with multi-hop wireless sensor networks. When the network initializes, at first synchronization formed virtual cluster between nodes, each node adopting cyclical interception sleep mechanism to reduce the consumption of energy nodes as much as possible in the state. In the same virtual cluster, remained an interception sleep scheduling between the nodes, started interception at the same time. Sending and receiving data between nodes adopt RTS / CTS / DATA / ACK mechanism for reliable transmission, but also according to its own queue in the packet predict the number of network traffic changes, adaptive duty cycle adjust, reduce packet transmission time. At the same time, Interception is adopted adaptive mechanism to reduce wait delay because of node sleep. The invention of the method in different network traffic circumstances can be lower latency, power consumption and throughput performance has also been some improvement.

Description

technical field [0001] The invention relates to a traffic self-adaptive wireless sensor network channel access control method, which can adapt to changes in network traffic, has the advantages of high energy efficiency, small time delay and the like, and is suitable for multi-hop wireless sensor networks. Background technique [0002] The Channel Access Control (MAC) protocol determines the usage of the channel and allocates limited communication resources between communication nodes. It is one of the key network protocols to ensure efficient communication in the network. In wireless sensor networks, some special requirements are put forward for the MAC protocol. The nodes of wireless sensor networks are generally powered by batteries. Compared with traditional Ad hoc networks, there are more stringent requirements for energy consumption. Therefore, maximizing the service life of the network is a priority for network designers. Performance such as delay should be considered...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/56H04W52/02H04W56/00
CPCY02D30/70
Inventor 何晨陈国铭蒋铃鸽
Owner SHANGHAI JIAO TONG UNIV
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