CAJ | 학술논문

当前立体空间内多种网络重叠覆盖，在收益率、用户体验等因素的驱动下，运营商在其掌握的异构网络间进行无缝切换势在必行。但在一些安全环境中，例如遇到一些需要与外界联系的紧急情况，收益和并不能成为触发切换的唯一条件，网络拥堵也会是影响通信至关重要的一个因素。提出一个新的基于SIP协议的异构网络拥塞识别切换的技术。不仅基于信号的强度，而且还基于目标网络的状态来融入新的SIP消息切换策略。由于SIP协议与下层协议无关，因此可以比较容易地配置到运营商的环境，具有一定的实用性。仿真结果表明，使用该机制可以在保证QoS的前提下，让用户以较小的代价切换到目标网络。
당전입체공간내다충망락중첩복개，재수익솔、용호체험등인소적구동하，운영상재기장악적이구망락간진행무봉절환세재필행。단재일사안전배경중，례여우도일사수요여외계련계적긴급정황，수익화병불능성위촉발절환적유일조건，망락옹도야회시영향통신지관중요적일개인소。제출일개신적기우SIP협의적이구망락옹새식별절환적기술。불부기우신호적강도，이차환기우목표망락적상태래융입신적SIP소식절환책략。유우SIP협의여하층협의무관，인차가이비교용역지배치도운영상적배경，구유일정적실용성。방진결과표명，사용해궤제가이재보증QoS적전제하，양용호이교소적대개절환도목표망락。
Various networks overlay in the three-dimensional space. Under the driving factor in return and user experi-ence, operators for seamless handoff are imperative in the heterogeneous network. But in some environments, such as con-tacting with the outside world in case of emergency, return can’t be the only condition for triggering switch;network con-gestion will also be one of the factors that affect the communication. This paper proposes a new congestion identification method merging SIP technology for heterogeneous network handover. Based not only on the intensity of the signal, but also the status of the target network, it proposes the SIP message as the new switching strategy. Because the SIP protocol has nothing to do with the lower layer protocol, so it can be easily configured to the operator’s environment and will have a certain practicality. The simulation results show that, the method can be used to switch to the target network under the premise of QoS with lower cost.