Synchronous and asynchronous MAC protocol smooth transient method in distributing network
A distributed network and smooth transition technology, applied in the direction of electrical components, transmission systems, etc., can solve the problems of high convergence speed requirements of synchronization algorithms, limitations of synchronization accuracy, and synchronization accuracy limitations, so as to achieve flexible use, avoid interference, The effect of reducing complexity
Inactive Publication Date: 2007-01-03
THE PLA INFORMATION ENG UNIV
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[0007] The disadvantages of this method are: on the one hand, additional overhead is required to achieve synchronization between nodes, and the convergence speed of the synchronization algorithm is high; on the other hand, it is difficult to judge whether the network is fully synchronized; and even if synchronization has been achieved, The nodes in the network will also switch between the synchronous state and the asynchronous state continuously, and the synchronization accuracy of this method is also limited to a certain extent;
[0008] To sum up, the existing algorithms usually bring a lot of overhead, and need to periodically maintain the synchronization between nodes, and the accuracy of synchronization is also limited
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[0024] The purpose of the present invention is to design a synchronous MAC protocol and an asynchronous MAC protocol for the mobile ad hoc network respectively, adopt different MAC protocols for different states of the nodes, and finally realize the smooth transition of the network between different states. The synchronous node mentioned in the present invention refers to that strict time synchronization can be realized by a certain network clock reference between nodes, so the synchronous MAC protocol is adopted in communication; Strict time synchronization, so asynchronous MAC protocol is usually used in communication.
[0025] In order to achieve the above object, the core idea of the present invention is: the node publishes the channel allocation information of the synchronous protocol or the channel allocation information of the asynchronous protocol according to the protocol being run, and obtains and maintains the channel allocation information of the adjacent node by ...
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A smooth transition method of synchronous and asynchronous MAC protocol in distributed network includes maintaining and issuing channel distribution information of synchronous protocol and asynchronous protocol by node, judging whether adjacent node is synchronous one or asynchronous one according to channel distribution information, selecting idle time slot to send data by synchronous node according to channel distribution information and finalizing data transmission in idle period of channel by asynchronous node according to channel distribution information.
Description
technical field [0001] The invention relates to a method for smooth transition of synchronous and asynchronous MAC protocols in a distributed network, in particular to a method for realizing smooth communication between nodes respectively using synchronous and asynchronous MAC protocols in a mobile ad hoc network. Background technique [0002] Mobile ad hoc network is a general mobile communication method. The mobile ad hoc network is a multi-hop temporary autonomous system composed of a group of mobile nodes with wireless transceivers. The communication system is a distributed control network without a center. It does not need the support of network infrastructure, and can form a network anytime and anywhere to realize multi-hop mobile communication. [0003] The node of the mobile ad hoc network has both the functions of router and host. When the node acts as the host, it runs user-oriented applications. When the node acts as a router, it runs the corresponding routing pr...
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IPC IPC(8): H04L29/06
Inventor 李青于宏毅张效义张大龙
Owner THE PLA INFORMATION ENG UNIV