{"title":"Integration of WLAN and WiMAX with base station assisted QoS","authors":"G. A. Prasath, M. Ma, Cheng Peng Fu","doi":"10.1109/WOCN.2008.4542483","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542483","url":null,"abstract":"IEEE 802.11 is the WLAN standard for providing moderate to high speed data communication in a short range generally within a building. IEEE 802.16 (WiMAX) is the standard for broadband WMANs which can provide Internet access over a long range outdoor environment susceptible to fading inside buildings. The logical topology to extend the coverage of the broadband WiMAX is to integrate it with WLAN at customer premises equipments (CPE). However providing QoS in such an integrated environment is a challenging issue. In this paper, we have proposed an integration model and a base station assisted scheduling mechanism to be implemented at the CPE to provide QoS guarantee. We have analyzed the algorithm through extensive simulation and showed that QoS can be provided for real-time and non-real-time traffic over the broadband integrated network.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126959593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hushairi Zen, Edith Cowan, D. Habibi, Justin Wyatt, I. Ahmad
{"title":"Converging voice, video and data in WLAN with QoS support","authors":"Hushairi Zen, Edith Cowan, D. Habibi, Justin Wyatt, I. Ahmad","doi":"10.1109/WOCN.2008.4542485","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542485","url":null,"abstract":"Providing quality of service (QoS) for converging traffic in wireless local area network (WLAN) is still a major issue for the researchers and industries. Due to the limited bandwidth and exposure to unpredictable interferences in a wireless environment, efficient management and optimization of the access protocols are essential to provide acceptable QoS for real-time traffic and fairness to best-effort traffic. In this paper, we investigate the throughput and delay performance of the legacy IEEE 802.11 and the 802.11e when carrying converging data in WLAN. We evaluate our recently proposed protocol known as wireless token network protocol (WTN) and show that WTN successfully increases performance of converging traffic in WLAN by, first, decreasing the size of the frames and subframes of the MAC header, and second, by implementing centralized polling to reduce collisions of packets.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129569281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Load balanced routing to enhance the performance of optical backbone networks","authors":"P. Rajalakshmi, A. Jhunjhunwala","doi":"10.1109/WOCN.2008.4542490","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542490","url":null,"abstract":"In this paper, we identify the topological and routing technique constraints on the performance of optical backbone WDM networks with wavelength conversion at the nodes and propose techniques to over come this constraints so that the network performance is enhanced. For any session request, a lightpath has to be established on the shortest path between the node pairs. As each lightpath is a substantial revenue and long-lived, the network operator would like no lightpath request rejection (call blocking) or would like to accommodate more calls in the network before he has to upgrade his network. Hence given a network, we are proposing an analytical method to identify the critical links of the network which will cause early blocking, for the fixed shortest path routing. Once the critical links are identified, we would like to analyse the physical location of these critical links on the network topology and propose a new fixed routing technique namely, restricted routing by which the performance is enhanced as it balances the load uniformly among the links. In this routing technique, not all the calls have the shortest path. We compare the performance of the restricted routing with the optimal performance where all the links have equal blocking probability. The analysis is carried out on some of the standard backbone networks and the results show that by the restricted routing there is a significant performance improvement.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121505570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design of coaxial fed microstrip antenna for LEO satellites","authors":"N. Mariam","doi":"10.1109/WOCN.2008.4542531","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542531","url":null,"abstract":"The paper presents a step by step procedure for designing microstrip antenna for LEO satellites. The design uses transmission line method as it offers good physical insight. The design is simulated using Ansoft HFSS TM V9.2 which employs finite element method to achieve the desired specification. The paper presents simulated results for total gain and far field radiation patterns. The analysis of the simulated results confirms successful design of coaxial fed microstrip antenna.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132961033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}