scholarly journals QoS Supported IPTV Service Architecture over Hybrid-Tree-Based Explicit Routed Multicast Network

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Chih-Chao Wen ◽  
Cheng-Shong Wu
Keyword(s):  
Traffic Engineering ◽  
Routing Algorithm ◽  
Video Stream ◽  
Ip Multicast ◽  
Channel Switching ◽  
High Quality ◽  
Service Architecture ◽  
Signaling Mechanism ◽  
Iptv Service ◽  
Standard Quality

With the rapid advance in multimedia streaming and multicast transport technology, current IP multicast protocols, especially PIM-SM, become the major channel delivery mechanism for IPTV system over Internet. The goals for IPTV service are to provide two-way interactive services for viewers to select popular program channel with high quality for watching during fast channel surfing period. However, existing IP multicast protocol cannot meet above QoS requirements for IPTV applications between media server and subscribers. Therefore, we propose a cooperative scheme of hybrid-tree based on explicit routed multicast, called as HT-ERM to combine the advantages of shared tree and source tree for QoS-supported IPTV service. To increase network utilization, the constrained shortest path first (CSPF) routing algorithm is designed for construction of hybrid tree to deliver the high-quality video stream over watching channel and standard quality over surfing channel. Furthermore, the Resource Reservation Protocol- Traffic Engineering (RSVP-TE) is used as signaling mechanism to set up QoS path for multicast channel admission control. Our simulation results demonstrated that the proposed HT-ERM scheme outperforms other multicast QoS-based delivery scheme in terms of channel switching delay, resource utilization, and blocking ratio for IPTV service.

An Efficient K-Shortest Paths Based Routing Algorithm

2012 ◽  
Vol 532-533 ◽  
pp. 1775-1779
Author(s):  
Jian Lian ◽  
Yan Zhang ◽  
Cheng Jiang Li
Keyword(s):  
Computer Networks ◽  
Shortest Path ◽  
Traffic Engineering ◽  
Routing Algorithm ◽  
Shortest Paths ◽  
Routing Algorithms ◽  
Dijkstra Algorithm ◽  
Link State

We present an efficient K-shortest paths routing algorithm for computer networks. This Algorithm is based on enhancements to currently used link-state routing algorithms such as OSPF and IS-IS, which are only focusing on finding the shortest path route by adopting Dijkstra algorithm. Its desire effect to achieve is through the use of K-shortest paths algorighm, which has been implemented successfully in some fileds like traffic engineering. The correctness of this Algorithm is discussed at the same time as long as the comparison with OSPF.

The Effect of Campus Culture on the Cultivation of Ethnic High Quality Talent

2012 ◽  
Vol 452-453 ◽  
pp. 564-567
Author(s):  
Ben Zhang ◽  
Yang Gao ◽  
Xiao Hong Liu
Keyword(s):  
Cultural Construction ◽  
Campus Culture ◽  
Scientific Development ◽  
Social Culture ◽  
High Quality ◽  
The People ◽  
Comprehensive Development ◽  
Standard Quality ◽  
Core Requirements ◽  
National Universities

With the nation's development and expansion , "high-quality" has become an important standard quality to judge talent. While the campus culture is part of the composition of college, powerful culture plays an important role in cultivating the talent with high quality. The influence of campus culture is extraordinarily significant especially in the process of cultivating minority of high-quality personnel in the national universities. The Third Plenary Session of our party clearly put forward that: "To adhere to the people-oriented, pursuit coordinated and sustainable development, to promote social economic and people's all-round development. Core requirements of the scientific development concept and is to adhere to the people-oriented and realize human's comprehensive development." The realization of human's comprehensive development, should improve people's material life, strengthen cultural construction, enrich people's spiritual life, and enhance the quality of people; It is basic requirements of the talents cultivation. Nowadays, culture has become an important part of comprehensive national strength. As part of the social culture, campus culture is significant in talents cultivation. China is a multi-ethnic country, but the economy of many minority areas is still backward and the school education level is low, strengthening the cultivation of talents is the key point. Some national universities have made the institute of campus culture construction and draw the relevant conclusions: "to strengthen the construction of campus culture is the need of social culture and the core need to enhance competence of the university. " This paper will expound the influence of particularity of the ethnic national college that has on the minority high-quality cultivation from the needs of talents training .

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