Hybrid time slot reservation method in distributed tdma protocol

Abstract

The invention discloses a hybrid time slot reservation method in a distributed TDMA protocol, which mainly solves the problem that it is difficult to guarantee the time delay requirement in the case of service load changes in a wireless ad hoc network. The solution is: assign fixed time slots to nodes to meet basic business needs; if the load is high and the fixed time slots are not enough, then reserve dynamic time slots; because the dynamic time slot reservation process takes more time, it is not conducive to sudden Therefore, when there is a high-load burst business, nodes use competition to occupy idle time slots, and introduce priority competition and reservation negotiation mechanisms to reduce competition conflicts. The present invention combines fixed time slot division, dynamic time slot reservation, and non-reserved burst transmission together, provides data transmission capability adaptive to load changes, ensures the stability of system time delay, and improves the time slot utilization rate. It can be used in the TDMA protocol of the mobile ad hoc network.

Description

technical field [0001] The invention belongs to the technical field of communication, and particularly relates to a hybrid time slot reservation method, which is applicable to the TDMA protocol in a mobile ad hoc network, adaptively allocates time slots according to service load changes, and ensures stable time delay requirements. Background technique [0002] A wireless ad hoc network is a wireless communication network that does not require a fixed infrastructure and uses distributed management. Since the self-organizing network has the characteristics of simple deployment and the ability to adapt to dynamic changes in the network topology, it is very suitable for scenarios such as battlefields and emergency rescue, so it has received more and more attention in recent years. [0003] Since the wireless ad hoc network is a multi-hop network, the traditional competitive multiple access methods, such as carrier sense multiple access CSMA protocol, have low channel throughput ...

AI Technical Summary

Problems solved by technology

[0005] One is that nodes need to collect geographic location information of neighboring nodes before selecting a time slot, which is not easy for other mobile ad hoc networks;

[0006] The second is to dynamically adjust the frame length according to the density change. It is difficult to quickly coordinate the adjustment of the surrounding nodes at the same time, and it is impossible to guarantee a stable delay requirement.

The shortcomings of this method are: firstly, this method mainly uses the method of contention access and random backoff to apply for links. When the number of nodes is large,

[0008] When the business volume is large, the throughput of the network is low; secondly, there is no good adaptability to the business load, and the transmission delay of the system cannot be guaranteed

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