Method and device for realizing dynamic time slot allocation

Abstract

The invention discloses a method and device for realizing dynamic time slot allocation. The method includes: a server sorts the nodes that need to allocate time slots according to the dynamic priority table, and when each node has a burst of emergency traffic, according to the priority The level dynamically allocates time slots for each node; the server selects the appropriate sending time slot for each node according to the message length of the burst emergency traffic. The dynamic allocation time slot of the present invention is based on the dynamic priority table, and the server allocates the time slot to each network node according to the priority; at the same time, the appropriate time slot can be selected according to the length information of the message sent by each node and the time slot used by the node last time. The transmission time slot greatly improves the utilization rate of the time slot, and ensures the timely and effective communication of the data link emergency node information; it also meets the transmission needs of the node emergency message information, and solves the existing problems in the network in the prior art. When sending business flows, it cannot adapt to the problem of a network with a dynamically changing scale.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for realizing dynamic time slot allocation. Background technique [0002] In recent years, TDMA (full name in English: time division multiple access, Chinese name: time division multiple access) access method has been favored in the research and development of data links because of its advantages of less resource occupation, good anti-interception and anti-interference. received more and more attention. The time slot allocation algorithm of TDMA is a key element of responding to the network management strategy. It divides the channel into time slots, obtains higher channel utilization efficiency through clear channel allocation, and significantly improves the ability of the network to handle different types of services, making the communication system Delay and bandwidth allocation are controllable. Time slot allocation mainly includes three a...

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Problems solved by technology

However, this method takes the system parameters of the entire network as input, and it is difficult to predict the overall parameters of the network when there are many nodes in the system or the nodes move freely, especially when there are sudden traffic flows in the network, it cannot adapt to the network with dynamic changes in scale. It has poor flexibility , poor scalability and practicability

[0005] In the dynamic time slot allocation method, the disadvantage of the D-TDMA protocol is that it does not implement space division multiplexing in the request time frame and data time frame, and the number of data time slots needs to be preset, which will cause waste of data time slots or insufficient; the disadvantage of the P-TDMA protocol lies in two points. First, if a node does not have a request for sending time slots in the Claim subframe, it will cause a waste of time slots. When there are many nodes in the network that do not have a request for sending time slots, A large overhead will be introduced in the information exchange of nodes; the other is that the priority table of the network is pre-set, resulting in no chance for new nodes in the network to compete for time slots; the disadvantage of FCSA and FPRP protocols is that the protocol The parameters of the protocol are fixed and need to be pre-estimated. Only when the node density and mobility performance are within a certain range, these parameters can work well. The protocol confuses the node priority and service priority, and cannot fully realize the QoS guarantee, resulting in The phenomenon of wasting information slots in some network situations

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