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首页> 外文会议>Communication Theory, Reliability, and Quality of Service, 2009. CTRQ '09 >Priority Transmission of SIP Signaling Flows in Case of IP Link Congestion
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Priority Transmission of SIP Signaling Flows in Case of IP Link Congestion

机译：IP链路拥塞时SIP信令流的优先传输

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摘要

Conceptual framework of next generation network (NGN) is based on Internet protocol (IP) transport technology, which is generally accepted as the optimal solution for delivering of next generation multimedia services. Although packet-switched networks are in the mainstream, decades of experience with circuit-switched networks still set expectations when it comes to quality of service (QoS). As opposed to circuit-switched networks, signaling flow and media flow of NGN services are mixed in transmission. That makes it difficult for an IP network node to guarantee the signaling flow packet is not discarded in case of the congestion, which results in an impossibility to trigger the framework of dynamic QoS negotiation and implement service reachability. Since the service reachability is guaranteed in the signaling flow transmission aspect, it is necessary to consider the possibility of IP network to fulfill expectations regarding the straightway and reliable transmission of signaling flows. In this paper, the link congestion effect on critical performance metrics of session initiation protocol (SIP) signaling flows is investigated by performing extensive simulation study. Our results indicate that IP network is able to guarantee transmission criteria of SIP signaling flows even in case of critical link congestion when the highest priority is assigned to them.
机译：下一代网络（NGN）的概念框架基于Internet协议（IP）传输技术，该技术通常被认为是交付下一代多媒体服务的最佳解决方案。尽管分组交换网络已成为主流，但在服务质量（QoS）方面，数十年的电路交换网络经验仍然树立了期望。与电路交换网络相反，NGN服务的信令流和媒体流在传输中混合在一起。这使得IP网络节点难以保证在拥塞的情况下不会丢弃信令流数据包，从而导致无法触发动态QoS协商框架并实现服务可达性。由于在信令流传输方面保证了服务的可达性，因此有必要考虑IP网络满足关于信令流的直线性和可靠传输的期望的可能性。本文通过进行广泛的仿真研究，研究了链路拥塞对会话发起协议（SIP）信令流的关键性能指标的影响。我们的结果表明，即使在关键链路拥塞的情况下（当为其分配最高优先级时），IP网络也能够保证SIP信令流的传输标准。

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