摘要： 长期演进(LTE)系统在分组交换域内承载语音业务，但对延迟和丢包敏感的语音业务服务质量较难得到保证。为此，提出一种排队延迟感知的语音分组调度机制，根据队列长度、信道条件、排队延迟以及业务最大允许延迟来确定用户调度优先级，从而实现用户资源的合理分配。理论分析和仿真结果表明，与VSM调度机制相比，该调度机制在确保时延和系统吞吐量满足要求的前提下，能有效地利用网络资源，降低丢包率，提高用户公平性。
关键词:
语音业务,
资源分配,
调度优先级,
服务质量,
排队延迟
Abstract: Long Term Evolution(LTE) system carries voice business in the packet-switched domain. The voice business quality of delay and packet loss-sensitivity is difficult to be ensured. Therefore, this paper presents a voice business scheduling mechanism of Queueing Delay Aware(QDA). It determines the users’ scheduling priority according to the queue length, the channel conditions, the queuing delay and business maximum permissible delay, and allocates user resources. Theoretical analysis and simulation results show that the proposed scheduling mechanism can effectively use network resources, reduce the packet loss rate and improve user fairness under the condition that delay and system throughput meet the requirements compared with the VoIP Scheduling Model(VSM) scheduling mechanism.
Key words:
voice business,
resource allocation,
scheduling priority,
Quality of Service(QoS),
queueing delay
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