无线接入系统的资源分配及实现

Resource Allocation and Realization in Wireless Access System

无线接入系统的资源分配在考虑传输带宽利用率的同时,还要兼顾业务的服务质量(QoS),另外,还与设备硬件有关,其中最主要的是存储器;不同的业务具有不同的特性,使得其接纳控制、队列调度只有和业务特性相对应时才能获得好的性能。并且接纳控制和分组调度存在相互影响的关系,调度不及时的队列占用了较多的存储容量,则当有新分组到达时可能由于存储空间不足而导致丢弃,所以分组调度部件要考虑队列优先级,还要考虑队列大小,以获得服务的公平性。

Besides the utility efficiency of the transmission bandwidth, the quality of service is also to be considered in the resource allocation in wireless access systems. Moreover, the resource allocation has a relationship with the hardware of the facility, especially the memory. As different services have different characteristics, the admission control and queue schedule should correspond to the service characteristics to obtain better performance. The admission control and queue schedule affect each other, so if the queues not scheduled in time occupy much memory capacity, it is likely the new packets that are arriving would be dropped because of limited memory capacity. So the part of packet schedule not only has to consider the PRI and also has to consider the size of the queue to obtain equity of services.