MARC 主機 00000nam  2200325   4500 
001    AAI3159371 
005    20060228143338.5 
008    060228s2005                        eng d 
020    0496922467 
035    (UnM)AAI3159371 
040    UnM|cUnM 
100 1  Bunnjaweht, Dahmmaet 
245 10 On the investigation of physical layer multiple path 
       connections in a wireless network 
300    163 p 
500    Source: Dissertation Abstracts International, Volume: 65-
       12, Section: B, page: 6543 
500    Director:  Mark A. Wickert 
502    Thesis (Ph.D.)--University of Colorado at Colorado Springs,
       2005 
520    Future generations of wireless systems are designed for 
       multimedia communication, with a wide range of data types 
       and rates all sharing the same wireless infrastructure. In
       order to provide services with high capacity and desired 
       quality of service, the system requires efficient resource
       allocation. In the system based on a code division 
       multiple access technique, every user contributes to the 
       interference characteristics of the system. This 
       interference power is proportional to the transmitter 
       power. It is clear that power control is the most 
       important factor which allows more efficient resource 
       sharing by balancing received signal quality and 
       interference power 
520    The multiple path connections idea is well-studied in the 
       network layer of a wired infrastructure. Here we 
       investigate a similar idea in the physical layer of a 
       wireless access network. There is a major difference in 
       the sense of channel existence. In the wired network, 
       where the channels always exist, algorithms are based on 
       smart queues and routings. In the physical layer of a 
       wireless network, in contrast, channels are based on radio
       resource availability. Hence, based on the limited radio 
       resource, we propose an opportunity-driven multiple 
       connections scheme for resource sharing 
520    The proposed scheme is studied under two different types 
       of channels based on wideband code division multiple 
       access standard, the dedicated channel and the common 
       packet channel. The dedicated channel represents real-time
       traffic, while the common packet channel represents non-
       real-time traffic. Wideband code division multiple access 
       technology is chosen because it has emerged as the most 
       widely adopted third generation interface. The results 
       obtained are encouraging. Even with a simple algorithm, 
       capacity improvement from the proposed scheme can be seen 
590    School code: 0892 
590    DDC 
650  4 Engineering, Electronics and Electrical 
690    0544 
710 20 University of Colorado at Colorado Springs 
773 0  |tDissertation Abstracts International|g65-12B 
856 40 |uhttp://pqdd.sinica.edu.tw/twdaoapp/servlet/
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