A dynamic and static mixed time slot allocation method and system

Abstract

The present invention provides a dynamic and static mixed time slot allocation method and system, which are applied to wireless self-organizing networks. The time frame structure in the network and the length of each time slot in the time frame are set according to the capacity of nodes in the network Yes, the time slots in the network are divided into static time slots and dynamic time slots. Allocate each static time slot to a preset fixed node; allocate unoccupied dynamic time slots to dynamic nodes accessing the network according to a preset dynamic time slot allocation strategy. It makes up for the defects of using static access mode or dynamic access mode alone, and improves the flexibility of network entry and exit of nodes in the wireless ad hoc network.

Description

technical field [0001] The present invention relates to the technical field of mobile ad hoc network communication, and more specifically, relates to a dynamic and static mixed time slot allocation method and system. Background technique [0002] Wireless ad hoc network (Ad Hoc network) is a research focus of communication technology, and it is also one of the important development and research directions of communication technology. The nodes in the wireless ad hoc network are mobile and can move freely at any possible speed. Some nodes will increase the distance from other nodes as they move, and they will withdraw from the network; some nodes will also move with the movement. The process of establishing communication with other nodes and entering the network occurs, so the network has no fixed topology structure, and the topology structure changes with the change of nodes, which is random and unpredictable. [0003] TDMA is a wireless ad hoc network channel access method...

AI Technical Summary

Problems solved by technology

However, there are certain defects in this method, especially in the wireless ad hoc network, when a new node that has not allocated a time slot for it joins the network, that is, when the node enters the network, there is no available time slot, which will cause the node Unable to access the channel for data transmission

The dynamic TDMA access method is allocated in real time through a certain access strategy, which can improve the utilization rate of time slots, but it will inevitably lead to access conflicts, that is, the same time slot is allocated for two nodes, and according to the access Different access policies may lead to unaware access conflicts

[0004] Therefore, both the pure dynamic TDMA access method and the static TDMA access method have defects in the wireless self-organizing network, and there is no effective allocation strategy and time slot release strategy for nodes entering and exiting the network at an uncertain time. Improve the flexible network access and exit of nodes

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