完整后设资料纪录
DC 栏位语言
dc.contributor.author苏文山en_US
dc.contributor.authorWen-Shan Suen_US
dc.contributor.author王莅君en_US
dc.contributor.authorLi-Chun Wangen_US
dc.date.accessioned2014-12-12T01:13:02Z-
dc.date.available2014-12-12T01:13:02Z-
dc.date.issued2007en_US
dc.identifier.urihttp://140.113.39.130/cdrfb3/record/nctu/#GT009492510en_US
dc.identifier.urihttp://hdl.handle.net/11536/37937-
dc.description.abstract近年來,IEEE 802.16e 无线都会网路(wireless metropolitan area networks, WMANs) 变得非常的受欢迎,这是因为此网路有比IEEE 802.11 无线区域网路 (wireless local area networks, WLANs) 还要大很多的覆盖面积,然而过大的覆盖面积,很容易受到地形和距離的影响,因而造成使用者接收到的讯号强度太低;因此为了克服这个问题,许多的文章提出了讯号转传的概念來解决这一方面的间题,而由于中继站(Relay Stations, RSs) 具有转传讯号的功能,所以在现今的无线网路中,中继站被广泛地使用在其中。
在现今的文章中,中继站通常被应用在提升细胞系统边界使用者的讯号强度,然而在一个细胞系统中,基地台(Base Station, BS) 透过一个中继站在去做转传的工作需要经过兩个传输程序的时间,即是一个从基地台到中继站的时间,另一个是从中继站到使用者的时间,因此如果这兩个传输程序所经过的时间被考虑进去的话,那么增加中继站有可能会降低整个系统的容量,所以决定一个资料的传送是经由直接传送或是经过转传可由讯号的强度或是传送量來做选取。
在这篇論文,我们主要的研究方向是要在细胞系统裡寻找一个最佳的中继站放置的位置,让整个系统的容量能够达到最高的狀态。我们考量兩个中继站选取的方法去决定是否这个转传的时机是必需和正确的;一个是以讯号强度來做选取,而另一个是以传送量來做选取的动作。在这篇論文的结果中,我们可以发现以讯号强度來做选取的方法,可能有一些中继站放置位置的系统容量会低于没有加中继站的情况产生;另外以传送量來做选取的方法,我们可发现应用此方法去
做选取能够确保中站继放置在任何位置都能产生不低于没有加中继站的情况。我们也确认了一个最佳的中继站放置位置能够达到最高的系统容量。此外增加中继站的另一个优点就是能让更多的使用者能够达到最低的通讯可靠度,以及降低布建成本,所以我们还做了一个研究是当中继站被布建在最佳的位置时,这整个细胞系统所能达到的最大覆盖面积。
zh_TW
dc.description.abstractIn recent years, the IEEE 802.16e wireless metropolitan area networks (WMANs) is becoming very popular. Due to larger coverage compared to the IEEE 802.11 wireless local area networks (WLAN). However, the larger coverage is easy to be influenced by terrain and distance e®ects. In order to overcome those issues, the concept of relay stations (RSs) is suggested.
Relay stations are usually used to enhance the signal strength for the users close to the cell boundary. However, transmission through a relay station needs two transmission phases, i.e., one is from the base station (BS) to the relay station and the other is from relay station to mobile stations (MSs). Thus, relay may also decrease system capacity if two-phase transmission time is considered. As a result, whether or not data are transmitted by one-hop or two-hop phases should be determined based on both signal strength and throughput. In this paper, we investigate the optimal relay location aiming to maximize system capacity. We consider two relay selection rules for determining whether a two-hop transmission is necessary: signal strength-oriented and throughput-oriented. We ‾nd that the signal strength-oriented two-hop transmission may yield even lower system capacity than the one-hop transmission.
Based on the throughput-oriented rule, we find that the throughput in the two-hop transmission can be higher than that in the one-hop transmission at some locations. We also identify the optimal relay location that can achieve the highest system capacity, In addition, we also investigate the maximal coverage of the radio after placing RS at the optimal location.
en_US
dc.language.isoen_USen_US
dc.subject中继站zh_TW
dc.subject最佳中继站位置zh_TW
dc.subject多跃式zh_TW
dc.subject最大覆盖面积zh_TW
dc.subjectRelay Stationen_US
dc.subjectOptimal Relay Locationen_US
dc.subjectMulti-Hopen_US
dc.subjectCapacity Enhancementen_US
dc.subjectCoverage Enhancementen_US
dc.title多跃式细胞系统之最佳中继站位置设计zh_TW
dc.titleDesign of Optimal Relay Location in Multi-Hop Cellular Systemsen_US
dc.typeThesisen_US
dc.contributor.department电机学院通讯与网路科技产业专班zh_TW
显示于类别:Thesis


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