一种针对无线多媒体业务的基于联合的缓存和调度的功率节省算法(英文)

Joint Buffering and Scheduling for Power Sensitive Multimedia Streaming in Wireless Networks

一种有效的节省移动终端功率损耗的方法是在保证用户服务质量的前提下,尽可能的将无线网络接口(WNI)切换至休眠状态。然而我们发现,在多媒体业务流的分组到达间隔非常短的情况下,这个策略并不十分有效。提出了一个新的功率节省算法JBS。通过在基站设置一个整形代理,对多媒体分组进行缓存,JBS很好的解决了分组到达间隔较短对功率节省性能的不利影响。进一步,通过使用我们设计的功率节省的机会调度器POS,JBS能够使系统中每个多媒体用户获得较高的吞吐量,并得到很好的分组时延性能。对JBS的性能进行了细致的仿真,结果表明JBS能够在保证用户服务质量的前提下有效降低WNI的功率损耗。

An effective strategy to save power of mobile terminals （MTs） is to switch the Wireless Network Interface （WNI） to sleep mode when the predefined quality of service （QoS） can be guaranteed during the following time interval. However, it has found that this approach alone does not always work well if the inter-packet intervals of the multimedia streaming are very short. A new power-efficient scheme, called Joint Buffering and Scheduling （JBS） was proposed. By employing a shaping proxy at the base station （BS） to buffer the streaming packets as bursts, JBS eliminated the negative impact of the shorter inter-packet intervals on the power-efficient mechanisms. Further, by using our designed Power-efficient Opportunistic Scheduler （POS）, JBS could provide each multimedia flow much higher throughput and excellent delay performance. An extensive set of simulations shows that JBS can provide each flow excellent playback quality while significantly reducing the power consumption of each WNI.