Hardware Development Of Ad Hoc Network Terminal And Improving Transmission Performance Approaches

The Ad-hoc network can be used for networking communications in infrastructure-free scenarios,and has good application potential in military communications and civil emergency communications.However,there are no mature ad-hoc terminal products available to the public in the markets.Currently commonly used wireless communication technology standards either do not support ad hoc networks and multi-hop transmission,or do not support bandwidth video transmission.Moreover,these technologies are based on CSMA/CA(Carrier Sense Multiple Access with Collision Avoidance)channel access control,which greatly reduces network performance due to channel access conflicts in large networks.This paper debugs the original Ad-hoc V2.0 hardware design solution to solve the problems and functional defects in its design.On this basis,complete the design,debugging and small batch production of Ad-hoc V2.1 hardware.Meanwhile,this paper analyzes and studies methods and measures to improve transmission performance such as multi-hop transmission and channel access control mechanism.The specific work of this article is summarized as follows:1)The circuit debugging and troubleshooting of V2.0 version.Ad-hoc V2.0hardware circuit is a circuit designed independently by the project team before,without any test after PCB making.The first work of this paper is to test and debug each unit circuit of this version of the hardware,eliminating all kinds of problems and faults in circuit design,PCB production and soldering.2)Circuit design,debugging and small batch production of V2.1 version.On the basis of V2.0 circuit debugging,part circuit design,PCB design,and function design supporting GPS second pulse are modified to make V2.1 version have better structure and function support.After the design is completed,PCB plate making,debugging and small batch production are carried out.3)Technical research to improve transmission performance,including the transplantation of BATMAN adv multi-hop routing protocol,the realization of SOTDMA and CSMA switching mechanism,improves the system's multi-hop transmission performance and transmission adaptability under different network scales.