Pub Date : 2012-04-01DOI: 10.1109/WCNCW.2012.6215525
C. Olariu, Adriana Hava, Piotr Szczechowiak, Y. Ghamri-Doudane
Next generation telematic services are expected to play a key role in future automotive applications. In order to achieve strong integration between the services and the underlying network infrastructure there is a need for both simulation and emulation of the entire system. This paper presents a combined simulation and emulation approach for telematic services prototyping in an emulated wireless vehicular mesh networking environment. The ns-3 wireless mesh model, SUMO vehicular mobility model and different telematic services are integrated to demonstrate high scalability and flexibility of the proposed approach.
{"title":"Prototyping telematic services in a wireless vehicular mesh network environment","authors":"C. Olariu, Adriana Hava, Piotr Szczechowiak, Y. Ghamri-Doudane","doi":"10.1109/WCNCW.2012.6215525","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215525","url":null,"abstract":"Next generation telematic services are expected to play a key role in future automotive applications. In order to achieve strong integration between the services and the underlying network infrastructure there is a need for both simulation and emulation of the entire system. This paper presents a combined simulation and emulation approach for telematic services prototyping in an emulated wireless vehicular mesh networking environment. The ns-3 wireless mesh model, SUMO vehicular mobility model and different telematic services are integrated to demonstrate high scalability and flexibility of the proposed approach.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121438959","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}
Pub Date : 2012-04-01DOI: 10.1109/WCNCW.2012.6215501
M. Sternad, M. Grieger, Rikke Apelfrojd, T. Svensson, Daniel Aronsson, Ana Belen Martinez
Channel state information at transmitters is important for advanced transmission schemes. However, feedback and transmission control delays of multiple milliseconds in LTE systems result in severe outdating of this information at vehicular velocities. Channel prediction based on extrapolation of the short-term fading is inadequate in LTE systems at vehicular velocities and high carrier frequencies. We here propose and evaluate a simple scheme which may extend the prediction horizon when used on vehicles: Use an additional antenna, a “predictor antenna”, placed in front of the transmission antennas in the direction of travel. This is of particular interest for use with moving relays: Local access points placed on e.g. buses or trams. A measurement-based study for 20 MHz downlink channels at 2.68 GHz is reported here for both line-of-sight and non-line-of-sight conditions.
{"title":"Using “predictor antennas” for long-range prediction of fast fading for moving relays","authors":"M. Sternad, M. Grieger, Rikke Apelfrojd, T. Svensson, Daniel Aronsson, Ana Belen Martinez","doi":"10.1109/WCNCW.2012.6215501","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215501","url":null,"abstract":"Channel state information at transmitters is important for advanced transmission schemes. However, feedback and transmission control delays of multiple milliseconds in LTE systems result in severe outdating of this information at vehicular velocities. Channel prediction based on extrapolation of the short-term fading is inadequate in LTE systems at vehicular velocities and high carrier frequencies. We here propose and evaluate a simple scheme which may extend the prediction horizon when used on vehicles: Use an additional antenna, a “predictor antenna”, placed in front of the transmission antennas in the direction of travel. This is of particular interest for use with moving relays: Local access points placed on e.g. buses or trams. A measurement-based study for 20 MHz downlink channels at 2.68 GHz is reported here for both line-of-sight and non-line-of-sight conditions.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115085729","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}
Pub Date : 2012-04-01DOI: 10.1109/WCNCW.2012.6215497
G. Elkheir, Athanasios S. Lioumpas, A. Alexiou
In this paper, we present a Machine to Machine (M2M) communication scheme, where the source communicates with the corresponding destination with the help of multiple relays. Relays that participate into the communication process are selected according to three alternative selection criteria, while the non selected relays sleep for periods of fixed length. Thus, the proposed method combines cooperative communication techniques and sleep wake mechanisms. In order to enhance further energy efficiency and prolong network lifetime, we seek to determine the optimal energy allocated at each active relay, according to the minimization of the total energy consumed at the relays, under specific error performance constraints. Simulation results are provided to illustrate the performance of the proposed method.
{"title":"Energy efficient cooperative scheduling based on sleep-wake mechanisms","authors":"G. Elkheir, Athanasios S. Lioumpas, A. Alexiou","doi":"10.1109/WCNCW.2012.6215497","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215497","url":null,"abstract":"In this paper, we present a Machine to Machine (M2M) communication scheme, where the source communicates with the corresponding destination with the help of multiple relays. Relays that participate into the communication process are selected according to three alternative selection criteria, while the non selected relays sleep for periods of fixed length. Thus, the proposed method combines cooperative communication techniques and sleep wake mechanisms. In order to enhance further energy efficiency and prolong network lifetime, we seek to determine the optimal energy allocated at each active relay, according to the minimization of the total energy consumed at the relays, under specific error performance constraints. Simulation results are provided to illustrate the performance of the proposed method.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123586574","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}
Pub Date : 2012-04-01DOI: 10.1109/WCNCW.2012.6215477
J. Gambini, S. Savazzi, P. Castiglione, U. Spagnolini, G. Matz
In this paper we consider a specific case-study where M indoor femtocells share the same radio resources for communicating to the central office. An outdoor macro-cell base station increases the level of co-channel interference (cross-tier interference). Analysis of the co-tier (arising from neighboring femtocells) and cross-tier interference levels affecting the multi-femtocell communications is based on a site-specific multi-link channel model obtained from a radio measurement campaign carried out at 2.4GHz [3]. In this context, we investigate the benefits of the Wireless over Cable (FemtoWoC) paradigm, based on the concept of deferring the PHY/MAC functionalities to a remote multicell FAP (femtocell access point), while leaving to the in-home device only the analog RF processing (amplify-and-forward -AF). Based on site-specific indoor-to-indoor and outdoor-to-indoor propagation parameters, interference mitigation for the uplink is carried out at the remote multicell FAP by taking into account realistic settings where: i) indoor radio propagation is impaired by Rician fading due to static multi-path fading components; ii) communication over the cable is affected by crosstalk produced by alien xDSL services; iii) imperfect knowledge of the radio channel limits the interference rejection performance at the multicell FAP.
{"title":"Wireless over cable in femtocell systems: A case study from indoor channel measurements","authors":"J. Gambini, S. Savazzi, P. Castiglione, U. Spagnolini, G. Matz","doi":"10.1109/WCNCW.2012.6215477","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215477","url":null,"abstract":"In this paper we consider a specific case-study where M indoor femtocells share the same radio resources for communicating to the central office. An outdoor macro-cell base station increases the level of co-channel interference (cross-tier interference). Analysis of the co-tier (arising from neighboring femtocells) and cross-tier interference levels affecting the multi-femtocell communications is based on a site-specific multi-link channel model obtained from a radio measurement campaign carried out at 2.4GHz [3]. In this context, we investigate the benefits of the Wireless over Cable (FemtoWoC) paradigm, based on the concept of deferring the PHY/MAC functionalities to a remote multicell FAP (femtocell access point), while leaving to the in-home device only the analog RF processing (amplify-and-forward -AF). Based on site-specific indoor-to-indoor and outdoor-to-indoor propagation parameters, interference mitigation for the uplink is carried out at the remote multicell FAP by taking into account realistic settings where: i) indoor radio propagation is impaired by Rician fading due to static multi-path fading components; ii) communication over the cable is affected by crosstalk produced by alien xDSL services; iii) imperfect knowledge of the radio channel limits the interference rejection performance at the multicell FAP.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130152577","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}
Pub Date : 2012-04-01DOI: 10.1109/WCNCW.2012.6215471
K. Balachandran, Joseph H. Kang, Kemal Karakayali, K. Rege
Heterogeneous cellular networks comprising overlays of macro-cells and small metro-cells are susceptible to excessive interference on the uplink because of the asymmetry between the uplink and downlink signal strengths. While soft handoffs can be used to mitigate this problem, existing methods applied in homogeneous macro-cellular deployments rely on more symmetric coverage in both directions and are not as beneficial in asymmetric coverage scenarios. In this paper, we propose a novel cooperative uplink reception scheme called “Virtual Soft Handoff (VSHO)” that enables cells suffering excessive interference to cancel out-of-cell interference or decode out-of-cell users in close proximity by canceling in-cell interference, leading to significant improvement in spectral efficiency and cell-edge throughput. As an important side benefit, virtual soft handoffs also enable users served by macro-cells to benefit from selection diversity, leading to further improvement in system performance.
{"title":"Virtual soft handoff enabled dominant interference cancellation for enhanced uplink performance in heterogeneous cellular networks","authors":"K. Balachandran, Joseph H. Kang, Kemal Karakayali, K. Rege","doi":"10.1109/WCNCW.2012.6215471","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215471","url":null,"abstract":"Heterogeneous cellular networks comprising overlays of macro-cells and small metro-cells are susceptible to excessive interference on the uplink because of the asymmetry between the uplink and downlink signal strengths. While soft handoffs can be used to mitigate this problem, existing methods applied in homogeneous macro-cellular deployments rely on more symmetric coverage in both directions and are not as beneficial in asymmetric coverage scenarios. In this paper, we propose a novel cooperative uplink reception scheme called “Virtual Soft Handoff (VSHO)” that enables cells suffering excessive interference to cancel out-of-cell interference or decode out-of-cell users in close proximity by canceling in-cell interference, leading to significant improvement in spectral efficiency and cell-edge throughput. As an important side benefit, virtual soft handoffs also enable users served by macro-cells to benefit from selection diversity, leading to further improvement in system performance.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127874359","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}
Pub Date : 2012-04-01DOI: 10.1109/WCNCW.2012.6215539
R. Razavi, H. Claussen
This paper investigates the effect of small cell deployments in urban and dense urban areas from the energy consumption perspective. Considering a parametric power model for the legacy macrocell networks and the new emerging small cells, this study quantifies the power reduction gain by deploying heterogeneous networks consisting of a mixture of both technologies. As a part of the study, a framework is developed which determines the optimal network architecture in terms of the combination of small cells and macrocells. While the optimality is merely decided based on the overall power consumption performance, both capacity and coverage requirements are simultaneously addressed. The results presented in this paper are based on the field measured traffic demand data from the urban area of the Wellington, NZ. Additionally, the paper investigates the impact of future traffic growth and provides a 5-year outlook for energy consumption of the network. The presented numerical results confirm substantial power reduction gain from deploying small cells. This becomes even more critical in the future when the traffic demand is increasing and the offloading effects of small cells are most beneficial. Furthermore, this study suggests that improving the idle mode power consumption of small cells is one of the key areas which can enable significant total power reduction. This study can serve as a guideline for operators when estimating the power efficiency of their network.
{"title":"Urban small cell deployments: Impact on the network energy consumption","authors":"R. Razavi, H. Claussen","doi":"10.1109/WCNCW.2012.6215539","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215539","url":null,"abstract":"This paper investigates the effect of small cell deployments in urban and dense urban areas from the energy consumption perspective. Considering a parametric power model for the legacy macrocell networks and the new emerging small cells, this study quantifies the power reduction gain by deploying heterogeneous networks consisting of a mixture of both technologies. As a part of the study, a framework is developed which determines the optimal network architecture in terms of the combination of small cells and macrocells. While the optimality is merely decided based on the overall power consumption performance, both capacity and coverage requirements are simultaneously addressed. The results presented in this paper are based on the field measured traffic demand data from the urban area of the Wellington, NZ. Additionally, the paper investigates the impact of future traffic growth and provides a 5-year outlook for energy consumption of the network. The presented numerical results confirm substantial power reduction gain from deploying small cells. This becomes even more critical in the future when the traffic demand is increasing and the offloading effects of small cells are most beneficial. Furthermore, this study suggests that improving the idle mode power consumption of small cells is one of the key areas which can enable significant total power reduction. This study can serve as a guideline for operators when estimating the power efficiency of their network.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126441899","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}
Pub Date : 2012-04-01DOI: 10.1109/WCNCW.2012.6215535
M. Hasegawa, Y. Kon, K. Ishizu, H. Murakami, H. Harada
This paper shows autonomous optimization techniques for distributed cognitive radio architecture. Based on the context information exchange mechanism standardized in IEEE1900.4, we assume that the terminals can obtain various types of context information of radio access networks (RANs) and they can make optimal decisions by themselves using the shared information. In our research, we apply the neural network based algorithms, the learning algorithms and the distributed optimization algorithms, to realize autonomous optimization of the cognitive networks. We apply the proposed schemes to the heterogeneous type cognitive radio, whose radio resource usage can be optimized by appropriate RAN selection. First, we apply learning algorithms to appropriate parameter selection for each RAN to maximize the aggregated throughput using multiple RANs. We show that our developed autonomous learning system can autonomously improve the throughput. We also apply a neural network based optimization technique to optimize radio resource usage of the entire network. We show that the proposed scheme can distributively optimize the entire network as an autonomous cognitive dynamic wireless system.
{"title":"Autonomous optimization techniques for cognitive dynamic wireless systems","authors":"M. Hasegawa, Y. Kon, K. Ishizu, H. Murakami, H. Harada","doi":"10.1109/WCNCW.2012.6215535","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215535","url":null,"abstract":"This paper shows autonomous optimization techniques for distributed cognitive radio architecture. Based on the context information exchange mechanism standardized in IEEE1900.4, we assume that the terminals can obtain various types of context information of radio access networks (RANs) and they can make optimal decisions by themselves using the shared information. In our research, we apply the neural network based algorithms, the learning algorithms and the distributed optimization algorithms, to realize autonomous optimization of the cognitive networks. We apply the proposed schemes to the heterogeneous type cognitive radio, whose radio resource usage can be optimized by appropriate RAN selection. First, we apply learning algorithms to appropriate parameter selection for each RAN to maximize the aggregated throughput using multiple RANs. We show that our developed autonomous learning system can autonomously improve the throughput. We also apply a neural network based optimization technique to optimize radio resource usage of the entire network. We show that the proposed scheme can distributively optimize the entire network as an autonomous cognitive dynamic wireless system.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126490295","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}
Pub Date : 2012-04-01DOI: 10.1109/WCNCW.2012.6215545
Rong Huang, Chunyan Feng, Tiankui Zhang
This paper focuses on energy efficient transmission in Amplify-and-Forward (AF) relay networks with bidirectional asymmetric traffic. A joint relay selection and power allocation scheme is designed to minimize the energy consumed per bit transmitted for both one-way and two-way relay networks. Through theoretical analysis, close-form solutions for energy efficient power allocation are derived at each relay. Then the direct transmission mode or the relay consuming the least energy is chosen by the sources according to the feedback of each relay. Simulation results present the considerable energy saving ability of the proposed scheme compared with the extended best worse channel relay selection and uniform power allocation (PA) schemes.
{"title":"Energy efficient design in AF relay networks with bidirectional asymmetric traffic","authors":"Rong Huang, Chunyan Feng, Tiankui Zhang","doi":"10.1109/WCNCW.2012.6215545","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215545","url":null,"abstract":"This paper focuses on energy efficient transmission in Amplify-and-Forward (AF) relay networks with bidirectional asymmetric traffic. A joint relay selection and power allocation scheme is designed to minimize the energy consumed per bit transmitted for both one-way and two-way relay networks. Through theoretical analysis, close-form solutions for energy efficient power allocation are derived at each relay. Then the direct transmission mode or the relay consuming the least energy is chosen by the sources according to the feedback of each relay. Simulation results present the considerable energy saving ability of the proposed scheme compared with the extended best worse channel relay selection and uniform power allocation (PA) schemes.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126749117","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}
Pub Date : 2012-04-01DOI: 10.1109/WCNCW.2012.6215479
Guang Lu, Dale Seed, Michael Starsinic, Chonggang Wang, Paul Russell
There are global initiatives underway to establish a communications framework for Smart Grid systems. These efforts are led by governments, standardization bodies, and industry consortiums. This paper analyzes several challenges that are associated with communicating in Smart Grid systems and assesses the suitability of using the European Telecommunications Standards Institute's machine to machine architectures and protocols (ETSI M2M) to communicate in Smart Grid systems. The paper concludes with a presentation of an ETSI M2M compliant prototyping system that demonstrates solutions to some of the communications challenges that are found in Smart Grid systems.
{"title":"Enabling Smart Grid with ETSI M2M standards","authors":"Guang Lu, Dale Seed, Michael Starsinic, Chonggang Wang, Paul Russell","doi":"10.1109/WCNCW.2012.6215479","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215479","url":null,"abstract":"There are global initiatives underway to establish a communications framework for Smart Grid systems. These efforts are led by governments, standardization bodies, and industry consortiums. This paper analyzes several challenges that are associated with communicating in Smart Grid systems and assesses the suitability of using the European Telecommunications Standards Institute's machine to machine architectures and protocols (ETSI M2M) to communicate in Smart Grid systems. The paper concludes with a presentation of an ETSI M2M compliant prototyping system that demonstrates solutions to some of the communications challenges that are found in Smart Grid systems.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127464279","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}
Pub Date : 2012-04-01DOI: 10.1109/WCNCW.2012.6215526
Zhenhui Yuan, H. Venkataraman, Gabriel-Miro Muntean
Efficient bandwidth estimation is significant for Quality of Service (QoS) of multimedia services in IEEE 802.11 WLANs. Many bandwidth estimation solutions have been developed such as probing-based technique and cross-layer scheme. However, these solutions either introduce additional traffic or require modification to the standard protocols. This paper develops a model based bandwidth estimation algorithm at application layer when TCP traffic is delivered in the IEEE 802.11 networks. The proposed model firstly considers both TCP congestion control mechanism and IEEE 802.11 contention-based channel access mechanism. The bandwidth estimation process at the server estimates the achievable bandwidth using two types of parameters: data size to be sent and the feedback information from receivers, i.e. packet loss rate and the number of clients. The two tailed T-test analysis demonstrates that there is a 95% confidence level that there is no statistical difference between the results from the proposed bandwidth estimation algorithm and the results from the real test. Additionally, the proposed algorithm achieves higher accuracy and lower standard deviation of bandwidth, in comparison with other state-of-the art bandwidth estimation schemes.
有效的带宽估计对IEEE 802.11无线局域网中多媒体业务的QoS (Quality of Service)具有重要意义。许多带宽估计的解决方案已经被开发出来，如基于探测的技术和跨层方案。然而，这些解决方案要么引入了额外的流量，要么需要修改标准协议。本文提出了一种基于模型的IEEE 802.11网络中传输TCP流量时应用层带宽估计算法。该模型首先考虑了TCP拥塞控制机制和IEEE 802.11基于争用的信道访问机制。服务器端的带宽估计过程使用两种类型的参数来估计可实现的带宽:要发送的数据大小和接收方的反馈信息，即丢包率和客户端数量。双尾t检验分析表明，在95%的置信水平上，本文提出的带宽估计算法的结果与实际测试的结果没有统计学差异。此外，与现有的带宽估计方案相比，该算法具有更高的精度和更低的带宽标准差。
{"title":"A novel bandwidth estimation algorithm for IEEE 802.11 TCP data transmissions","authors":"Zhenhui Yuan, H. Venkataraman, Gabriel-Miro Muntean","doi":"10.1109/WCNCW.2012.6215526","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215526","url":null,"abstract":"Efficient bandwidth estimation is significant for Quality of Service (QoS) of multimedia services in IEEE 802.11 WLANs. Many bandwidth estimation solutions have been developed such as probing-based technique and cross-layer scheme. However, these solutions either introduce additional traffic or require modification to the standard protocols. This paper develops a model based bandwidth estimation algorithm at application layer when TCP traffic is delivered in the IEEE 802.11 networks. The proposed model firstly considers both TCP congestion control mechanism and IEEE 802.11 contention-based channel access mechanism. The bandwidth estimation process at the server estimates the achievable bandwidth using two types of parameters: data size to be sent and the feedback information from receivers, i.e. packet loss rate and the number of clients. The two tailed T-test analysis demonstrates that there is a 95% confidence level that there is no statistical difference between the results from the proposed bandwidth estimation algorithm and the results from the real test. Additionally, the proposed algorithm achieves higher accuracy and lower standard deviation of bandwidth, in comparison with other state-of-the art bandwidth estimation schemes.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125183887","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}
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