一种改进的宽带卫星网络MAC协议

摘要

为了提高宽带卫星网络上行信道资源的利用率,同时保障多媒体业务的不同服务质量要求,需要采用合适的媒体接入控制协议.BTDAMA可以显著减少自相似业务的等待时延,并且提高了资源利用率.但它没有区分业务类型,不能保证高优先级业务的服务质量,也造成了一定程度上资源的浪费.在BTDAMA的基础上提出了一种基于业务优先级的带宽分配算法,针对不同的业务类型采用不同的分配方案,不仅保证了各类业务的服务质量,同时提高了资源利用率.%In order to improve the uplink channel resource utilization of broadband satellite network, while guarantee the quality of different multimedia services, it needs to adopt an appropriate media access control protocol. Burst target demand assignment multiple access (BTDAMA) significantly reduced the wait time of self-similar services, and improved the resource utilization. But it did not distinguish the business type, did not guarantee the quality of high-priority services, and caused a certain degree of the waste of resources. In this paper, an assignment algorithm of bandwidth is proposed, which is on the basis of business priority. By using different distribution scheme for different service types, it is useful to guarantee the quality of all kinds of business, and improves the resource utilization.