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A Proposed RED-based Scheduling Scheme for QoS in WiMAX Networks 一种基于red的WiMAX网络QoS调度方案
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800558
Po-Chun Ting, Chia-Yu Yu, N. Chilamkurti, Wang Tung-Hsien, C. Shieh
{"title":"A Proposed RED-based Scheduling Scheme for QoS in WiMAX Networks","authors":"Po-Chun Ting, Chia-Yu Yu, N. Chilamkurti, Wang Tung-Hsien, C. Shieh","doi":"10.1109/ISWPC.2009.4800558","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800558","url":null,"abstract":"IEEE 802.16 standard defines the broadband wireless access specification for WiMAX, but it did not specify a standard scheme for scheduling algorithms and admission control. As a result, we propose an uplink scheduling scheme called Random Early Detection based Deficit Fair Priority Queue (RED-based DFPQ) for WiMAX. RED-based DFPQ adjusts the deficit counter of rtPS based on the current queue length. Our proposed scheme improves the transmission quality of rtPS traffic in WiMAX networks. Our simulation results show that RED-based DFPQ enhances the throughput of rtPS, reduces the delay of rtPS and avoids the starvation of lower priority service classes when compared with other scheduling schemes.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126581416","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: 21
Collision Avoidance Multi-rate MAC Protocol: Solving Performance Anomaly in Multi-rate network 避免碰撞的多速率MAC协议:解决多速率网络中的性能异常
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800574
J.-T. Sung, C. Ke, N. Chilamkurti, Yueh-Min Huang
{"title":"Collision Avoidance Multi-rate MAC Protocol: Solving Performance Anomaly in Multi-rate network","authors":"J.-T. Sung, C. Ke, N. Chilamkurti, Yueh-Min Huang","doi":"10.1109/ISWPC.2009.4800574","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800574","url":null,"abstract":"Fading is one of the common characters of a wireless channel. Many rate adaptation mechanisms were proposed to enhance the IEEE 802.11 systems, but these may cause multiple rates in a single network. However, IEEE 802.11 DCF faces the performance anomaly in multi-rate network, that is, when the stations with different rates collide, the low-rate station will greatly degrade the high-rate station. In this paper, we propose a collision avoidance multi-rate MAC (CAMR-MAC) protocol, which is different from the current solutions for performance anomaly. Current performance anomaly solutions are to assign different priorities to stations with different rates based on the IEEE 802.11 DCF protocol, which is still a fully contention based protocol. The simulation results show that CAMR-MAC not only improves the network throughput but also effectively guarantees the temporal fairness of all stations.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"282 20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126952035","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: 6
Adaptive Token Polling MAC Protocol for Wireless Underwater Networks 无线水下网络自适应令牌轮询MAC协议
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800562
Gunilla E. Burrowes, J. Khan
{"title":"Adaptive Token Polling MAC Protocol for Wireless Underwater Networks","authors":"Gunilla E. Burrowes, J. Khan","doi":"10.1109/ISWPC.2009.4800562","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800562","url":null,"abstract":"The opportunities and applications for a large group of coordinating autonomous underwater vehicles (AUV) is exciting and provides greater exploration opportunities than fixed sensor nodes or using a single AUV. The work presented in this paper is the development of a Medium Access Control Protocol for a cluster of small autonomous vehicles working in a centralized network topology. Acoustic communication links are typically used for underwater operations, however are substantially limited by the physics of acoustic propagation which require essentially new scheduling protocols to those being used and developed for packet radio networks. This paper provides a discussion and overview of the essential issues for developing a new MAC protocol for a cluster of closely operating underwater vehicles and presents some performance results for a proposed Adaptive Token Polling Protocol.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115236658","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: 7
Performance Improvement by Efficient Polling in WiMAX Network WiMAX网络中高效轮询的性能改进
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800598
F. Yin, G. Pujolle, Ken Chen
{"title":"Performance Improvement by Efficient Polling in WiMAX Network","authors":"F. Yin, G. Pujolle, Ken Chen","doi":"10.1109/ISWPC.2009.4800598","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800598","url":null,"abstract":"In order to support different bandwidth allocation requirements from different applications, IEEE 802.16 standard suite defines two main polling modes, unicast polling and contention-based polling. Although the specification introduces four service classes to adaptively implement the polling mechanisms for different type of traffics, it does not specify exactly how these polling modes could be used for efficient bandwidth allocation. In this paper, we investigate the polling mechanisms in IEEE 802.16 networks, and propose a simple but efficient polling mechanism to improve the performance. The simulation results show that the proposed polling mechanism can utilize the uplink bandwidth efficiently and achieve better performance.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121880042","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: 1
A Multi-Dimensional Architectural Approach to Behavior-Intensive Adaptive Pervasive Applications 行为密集型自适应普适应用的多维架构方法
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-01 DOI: 10.1109/ISWPC.2009.4800554
Nasreddine Aoumeur, Kamel Barkaoui, G. Saake
{"title":"A Multi-Dimensional Architectural Approach to Behavior-Intensive Adaptive Pervasive Applications","authors":"Nasreddine Aoumeur, Kamel Barkaoui, G. Saake","doi":"10.1109/ISWPC.2009.4800554","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800554","url":null,"abstract":"Pervasive applications are featured by their transient interactions, explicit surrounding contexts and by the flow of activities. Towards transparently tackling these features yet rigorously modelling and validating such applications, this contribution capitalizes on SE advances: (1) explicit separation of concerns (e.g. interaction-centric functionalities and context-awareness); (2) flexible description of intrinsic rules governing any behavior-intensive task; and (3) concern-based transient architectural connectors to cope with adaptability. More precisely, we propose a multi-concern architectural approach that explicitly separate interaction concerns from context-aware ones. Each concern is first independently conceived through tailored ECA architectural connectors. These concerns are then accordingly integrated at the fine-grained activity level.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126014053","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: 3
An Integrated Load Balancing Scheme for Future Wireless Networks 面向未来无线网络的集成负载均衡方案
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2008-11-01 DOI: 10.1109/ISWPC.2009.4800569
Eng Hwee Ong, J. Khan
{"title":"An Integrated Load Balancing Scheme for Future Wireless Networks","authors":"Eng Hwee Ong, J. Khan","doi":"10.1109/ISWPC.2009.4800569","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800569","url":null,"abstract":"With the emerging IEEE 802.11n standard, the WLAN is poised as a promising ubiquitous networking technology to support multimedia applications where providing QoS becomes imperative. However, the 802.11 WLAN is not designed to support delay sensitive traffic. This problem is magnified during a handover and typically results in excessive handover latency and packet loss. In addition, a 802.11 WLAN handover process is predominantly based on the physical layer detection without QoS considerations. This often causes overloading of access points and consequently all its associated connections would suffer from high delay. The former can be resolved by reducing handover latency to achieve seamless handover and the latter can be mitigated by employing link layer detection in the 802.11 WLAN handover process and having an appropriate admission control scheme. Although the IEEE 802.11e standard supports prioritized QoS, it cannot guarantee strict QoS required by real-time services under heavy load. In this paper, we proposed an integrated load balancing scheme incorporating (i) QoS-based fast handover to support seamless handover by eliminating both detection and scanning phases from the 802.11 WLAN handover process; and (ii) soft admission control to protect QoS of existing connections when resources are low. This synergy allows us to perform QoS-related handover opportunistically and guarantees service QoS during and after handover respectively. Simulations showed that our proposed integrated load balancing scheme is capable of providing seamless handover and QoS provisioning for real-time VoIP services in terms of bounded delay and packet loss when considering multimedia traffic.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114390571","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: 22
Performance of Adaptive MIMO System Based on Beam-Nulling 基于波束零化的自适应MIMO系统性能研究
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2008-07-23 DOI: 10.1109/ICC.2009.5198804
M. Gheryani, Zhiyuan Wu, Y. Shayan
{"title":"Performance of Adaptive MIMO System Based on Beam-Nulling","authors":"M. Gheryani, Zhiyuan Wu, Y. Shayan","doi":"10.1109/ICC.2009.5198804","DOIUrl":"https://doi.org/10.1109/ICC.2009.5198804","url":null,"abstract":"In this paper, \"beam-nulling\" is proposed to send signals over a generated subspace orthogonal to the weakest spatial subchannel fed back from the receiver. Signal-to-interference-plus-noise ratio (SINR) of MMSE receiver is derived for beam-nulling. Then the associated average bit-error rate (BER) of beam-nulling is given numerically and verified by simulation results. Simulation results are provided to compare beam-nulling with beamforming at the same data rate. To improve performance further, beam-nulling is concatenated with linear dispersion code. Simulation results are also provided to compare the concatenated scheme with beamforming.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129607678","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: 4
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