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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 utilization rate of uplink channel resources in broadband satellite networks and to guarantee different service quality requirements of multimedia services, an appropriate media access control protocol needs to be adopted. BTDAMA can significantly reduce the latency of self-similar services and improve resource utilization. But it does not distinguish between business types, can not guarantee the service quality of high-priority business, but also resulted in a certain degree of waste of resources. Based on BTDAMA, a bandwidth allocation algorithm based on service priority is proposed. Different distribution schemes are adopted for different service types, which not only ensures the service quality of all kinds of services but also improves the resource utilization ratio.