Satellite Network Multi QoS Objective Routing Algorithm
In Chap. 4 , we described satellite network traffic engineering from the aspect of the entire network to prevent network congestion. Satellite network traffic engineering can balance the load of the whole network and improve the operational efficiency of
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Satellite Network Multi QoS Objective Routing Algorithm
5.1 Introduction In Chap. 4, we described satellite network traffic engineering from the aspect of the entire network to prevent network congestion. Satellite network traffic engineering can balance the load of the whole network and improve the operational efficiency of the satellite network system. However, it is not enough for providing the QoS services for the users. In recent years, the types and volume of business in the Internet have increased dramatically. Satellite networks, as an indispensible part of the global communication system, face the same problems as the Internet. The rapid increase of business types and volume requires satellite networks to be more reliable and provide more efficient service/ Moreover, a lot of new emerging business has QoS requirements. These QoS requirements come from the users’ business needs. For example, some real-time business has a high requirement on the end-to-end delay. Some business, such as voice call, is sensitive to the delay jitters. And there are also some types of business that have high requirements on both delay and jitter. Therefore, how to meet the different QoS requirements of different users is a challenging problem. Previous researches always focus on one single QoS requirement. For example, the delay jitters of the satellite network is improved in [1] from the aspect of flow switching. The switching of the satellite network is divided into two categories by Akyildiz et al.: Inter-satellite switching and ISL switching. The inter-satellite switching refers to the UDL link reconnection when a terrestrial gateway leaves its current entrance or exit satellite. The ISL switching refers to the path recalculation when some ISLs are no longer available with the movement of satellites. The delay jitter caused by flow switching is mitigated through location management and handover management in [1]. Location management is in charge of tracking and positioning of the user terminal for the access call, while handover management ensures the ongoing call is not affected by the changes of the service unit. The location management protocol processes the queuing and storage information in the local database while sending paging signals to locate the network users. The handover management analyzes the differences of user switching between a F. Long, Satellite Network Robust QoS-aware Routing, DOI: 10.1007/978-3-642-54353-1_5, National Defense Industry Press, Beijing and Springer-Verlag Berlin Heidelberg 2014
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5 Satellite Network Multi QoS Objective Routing Algorithm
terrestrial network and a satellite network. It adopts a new switching management algorithm, hence improves the QoS of the network. Similar to [1], the delay jitters of the satellite network were also improved from the aspect of link switching in [2]. The ATM-based satellite network was used as the research object in [2], and dynamic satellite network routing was also introduced in this chapter. The dynamic network topology is deemed as k perio
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