12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)最新文献_第3页

Performance evaluation of priority-based multimedia transmission with the PCF in an IEEE 802.11 standard wireless LAN IEEE 802.11标准无线局域网中PCF基于优先级的多媒体传输性能评估

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965323

Takahiro Suzuki, S. Tasaka

{"title":"Performance evaluation of priority-based multimedia transmission with the PCF in an IEEE 802.11 standard wireless LAN","authors":"Takahiro Suzuki, S. Tasaka","doi":"10.1109/PIMRC.2001.965323","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965323","url":null,"abstract":"This paper proposes two kinds of priority scheduling schemes, which are referred to as priority scheme I and priority scheme II, for multimedia transmission with the PCF (point coordination function) of the IEEE 802.11 standard MAC protocol. This paper focuses on a single BSA (basic service area) in an infrastructure network and adopts a hierarchical scheduling architecture. In the architecture, the AP (access point) schedules wireless terminals, and each wireless terminal schedules voice, video and data sources. In priority scheme I, wireless terminals exert priority control where voice and video transmission is given higher priority over data transmission. On the other hand, priority scheme II carries out priority control at both AP and wireless terminals. By simulation, we compare the performance of priority scheme I, priority scheme II and a non-priority scheme. Numerical results show that these priority schemes can support a larger number of multimedia wireless terminals than the non-priority scheme under the same condition.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133609124","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}

引用次数: 48

Frequency-time domain transmit power adaptation for a multicarrier system in fading channels 衰落信道下多载波系统的频域发射功率自适应

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965500

Jiho Jang, K. Lee, Yong-Hwan Lee

引用次数: 17

Multi-hop cellular networks: the architecture and routing protocols 多跳蜂窝网络:体系结构和路由协议

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965324

Ananthapadmanabha R, B. S. Manoj, C. Siva, Ram Murthy

{"title":"Multi-hop cellular networks: the architecture and routing protocols","authors":"Ananthapadmanabha R, B. S. Manoj, C. Siva, Ram Murthy","doi":"10.1109/PIMRC.2001.965324","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965324","url":null,"abstract":"Multi-hop cellular network (MCN) is an architecture proposed by Lin and Hsu (see INFOCOM 2000. IEEE, 2000) for wireless communication & MCNs combine the benefits of having a fixed infrastructure of base stations and the flexibility of ad-hoc networks. They are capable of achieving much higher throughput than current cellular systems, which can be classified as single-hop cellular networks (SCNs). This work concentrates on MCNs and SCNs using the IEEE 802.11 standard for wireless LANs. We provide a general overview of the architecture and the issues involved in the design of MCNs, in particular the challenges to be met in the design of a routing protocol. We extend the work of Lin and Hsu to enhance the throughput of such networks further. We propose a routing protocol for use in such networks. We conduct extensive experimental studies on the performance of MCNs and SCNs under various load conditions (both TCP and UDP). Then studies clearly indicate that MCNs with the proposed routing protocol are a viable alternative for SCNs, in fact they provide much higher throughput.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115192554","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}

引用次数: 102

A frame synchronization method for adaptive array antennas in digital mobile communications 数字移动通信中自适应阵列天线的帧同步方法

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965435

K. Fukawa, H. Suzuki

引用次数: 1

Capacity of a multihop mesh arrangement of radio cells connected by free-space optical links 由自由空间光链路连接的无线电单元的多跳网格排列的容量

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965319

S. Krishnamurthy, A. Acampora

{"title":"Capacity of a multihop mesh arrangement of radio cells connected by free-space optical links","authors":"S. Krishnamurthy, A. Acampora","doi":"10.1109/PIMRC.2001.965319","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965319","url":null,"abstract":"Provision of multimedia services to both stationary and non-stationary terminals is one of the key challenges in modern day telecommunications. A multi-tiered cellular radio system may provide adequate capacity needed to ensure reliable delivery of high quality broadband services to home, office, and mobile users. At the lowest tier, one may envisage picocellular base stations interconnected via short, highly focused free-space optical links, in a multihop mesh arrangement, thereby eliminating the need for new broadband access cabling to backhand traffic from the base stations. Ultimately, the traffic generated in these picocells must be relayed to an entry/exit port (end-office) of the core network. An intelligent routing/load-balancing strategy will help avoid hot spots on the mesh and increase network capacity. The performance metric would be the probability that a newly generated virtual connection must be blocked to maintain QoS guarantees, within this mesh network. A new dynamic routing/load-balancing algorithm is proposed to achieve high performance in terms of blocking probability in the presence of both uniform and nonuniform traffic distributions. Simulation results show that the algorithm dramatically helps in reducing congestion at hot spots in the network. For a toroidal grid configuration it is seen that the new dynamic routing to different end-offices achieves a 20% reduction in blocking probability when compared with a routing scheme wherein picocells have static affiliations with end-offices.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124366699","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}

引用次数: 8

Optimum bandwidth per sub-carrier of multicarrier/DS-CDMA for broadband packet wireless access in reverse link 反向链路中宽带分组无线接入的多载波/DS-CDMA每子载波最优带宽

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965314

S. Suwa, H. Atarashi, S. Abeta, M. Sawahashi

{"title":"Optimum bandwidth per sub-carrier of multicarrier/DS-CDMA for broadband packet wireless access in reverse link","authors":"S. Suwa, H. Atarashi, S. Abeta, M. Sawahashi","doi":"10.1109/PIMRC.2001.965314","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965314","url":null,"abstract":"This paper elucidates the optimum bandwidth per subcarrier in the reverse link for multicarrier (MC)/DS-CDMA using a 10 to 80 MHz bandwidth in a multipath fading channel with numerous resolved multipaths, taking into account all major effects, ie, the improvement in the Rake time diversity effect and the degradation in the path search and the channel estimation due to multipath interference (MPI). The simulation results show that the improvement in radio link performance is almost saturated at a bandwidth of greater than 40 MHz (the corresponding number of multipaths is 12-48) when the spreading factor of the channel is SF = 32, and the best performance is achieved at the bandwidth of approximately 20 MHz when SF = 4 with two-branch antenna diversity reception. This is generated by the tradeoff between the improvement in the Rake time diversity effect and the increased MPI in addition to the degradation in the path search and channel estimation accuracy associated with a lower average received signal-to-interference plus background noise power ratio. Therefore, we conclude that MC/DS-CDMA, where each carrier has the bandwidth of approximately 20-40 MHz, is one of the most promising candidates for broadband packet wireless access in the reverse link.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124440373","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}

引用次数: 18

On the capacity of TDMA cellular systems with dynamic channel assignment, power control and adaptive modulation 动态信道分配、功率控制和自适应调制的TDMA蜂窝系统容量研究

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965318

David A. J. Pearce, A. Burr, T. Tozer

引用次数: 3

Estimation of the local mean power over Nakagami fading channels 中上衰落信道的局部平均功率估计

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965471

Young-Chai Ko, Mohamed-Slim Alouini

引用次数: 8

Parallel acquisition of PN sequences in Rayleigh fading channel and the application to the multi-carrier CDMA systems 瑞利衰落信道中PN序列的并行采集及其在多载波CDMA系统中的应用

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965311

J. Moon, Yong-Hwan Lee

引用次数: 3

Experimental DSP-based CDMA modem for Ka-band satellite systems: low complexity code acquisition and tracking scheme 基于dsp的实验性ka波段卫星系统CDMA调制解调器:低复杂度码采集与跟踪方案

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965304

A. Conti, D. Dardari

引用次数: 2