空地通信系统的包信道复用算法设计

Design of Packet Channel Multiplexing Algorithm for Space-Earth Communication System

以具有复杂包业务特点的空地通信系统为对象,针对传统包信道复用算法具有高处理时延、高丢包率和低系统吞吐量等缺点,设计了一种新的包信道复用算法,可根据包到达率、复合数据包域长度和允许时延来动态选取包信道复用时间.给出新包信道复用算法的时间阈值参考,并对算法进行仿真.结果表明,新算法在保证高包信道复用效率的前提下,可以有效降低包信道复用时延和丢包率,增加有效数据的传输速率,提高系统吞吐量.

Aiming at a space-earth communication system with complex packet service, we propose a new packet channel muhiplexing algorithm to solve the problems of high processing delay, high packet loss rate, and low system throughput of traditional packet channel multiplexing with the traditional algorithms. In the new algo- rithm, the packet channel multiplexing time is dynamically selected based on packet arriving velocity, packet field length, and allowed time delay. Then the time reference threshold of the new packet channel multiple- xing algorithm is given and the algorithm is simulated. The results show that the new algorithm can ensure high packet channel multiplexing efficiency, depress packet channel multiplexing delay, increase transmission velocity of effective data, and improve system throughput.