2012 26th Biennial Symposium on Communications (QBSC)最新文献

On noisy source vector quantization via a subspace constrained mean shift algorithm 基于子空间约束均值移位算法的噪声源矢量量化研究

2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-06-21 DOI: 10.1109/QBSC.2012.6221361

Y. A. Ghassabeh, T. Linder, G. Takahara

引用次数: 14

Wireless multiple-input single-output optical links with coherent detection 无线多输入单输出光链路相干检测

2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221339

Mingbo Niu, Julian Cheng, J. Holzman

引用次数: 0

Scheduling vs. pseudo-scheduling models in IEEE 802.16j wireless relay networks IEEE 802.16j无线中继网络中的调度与伪调度模型

2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221360

B. Jaumard, T. Murillo, S. Sebbah

{"title":"Scheduling vs. pseudo-scheduling models in IEEE 802.16j wireless relay networks","authors":"B. Jaumard, T. Murillo, S. Sebbah","doi":"10.1109/QBSC.2012.6221360","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221360","url":null,"abstract":"Given the relatively low costs associated with its deployment and its capacity to deliver last mile wireless broadband access, WiMAX and LTE are the current technologies of choice to effectively meet the increasing demand for high bandwidth services and applications. In the literature, several pseudo scheduling algorithms, which are very often time-independent, have been proposed to optimize the scheduling horizon without taking care of the sequencing of packets within the scheduling period. In this paper, we develop an optimization model having in mind to perform \"true\" scheduling, not only optimizing the scheduling horizon but taking into account the allocation of resources over a given time window. We propose a two-step solution scheme. The first step relies on a model, which chooses among a set of possible configurations (a set of transmitting links over a predetermined period of time slots) with end-to-end transmissions. The second step consists in a time ordering of those configurations, in order to complete the scheduling process. In our experiments, we compare our solution scheme with one of those so-called \"scheduling\" in order to investigate how the throughput varies depending on whether we use pseudo=scheduling vs. \"true\" scheduling. The results show how explicitly considering nodal buffers can make a meaningful difference on the forms of scheduling, depending on the assumptions on the buffer sizes.","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133910222","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

Fairness in delay-aware cross layer data transmission scheme for wireless sensor networks 无线传感器网络延迟感知跨层数据传输方案的公平性

2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221370

I. Al-Anbagi, M. Erol-Kantarci, H. Mouftah

{"title":"Fairness in delay-aware cross layer data transmission scheme for wireless sensor networks","authors":"I. Al-Anbagi, M. Erol-Kantarci, H. Mouftah","doi":"10.1109/QBSC.2012.6221370","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221370","url":null,"abstract":"Prioritization of the data collected by the Wireless Sensor Networks (WSNs) can provide promising performance enhancements for applications that monitor and control the critical systems. Particularly, in smart grid, defense and e-health applications, delivering high priority data with low latency is important. Previous works have focused on various cross layer approaches for providing Quality of Service (QoS) in WSNs. However, in the ad hoc nature of WSNs it is highly challenging to become aware of selfish nodes that may exploit those QoS-aware approaches. In our previous work, we have proposed a delay-aware cross layer technique for WSNs. In this paper, we propose a cross layer scheme that is both fairness-aware and delay-aware. Our fairness in delay-aware cross layer data transmission scheme (FDRX) is based on delay-estimation and data prioritization steps that are performed before the data transmission by the application layer. If the estimated delay is higher than the acceptable latency range for the high priority data, MAC layer parameters respond to the delay requirements of the application and vary channel access mechanism in a fair manner. Our results show that the proposed FDRX scheme is able to reduce end-to-end delay for data demanding timely delivery while the latency of the other packets is slightly impacted. Furthermore, our approach is able to maintain acceptable performance in terms packet delivery and energy consumption.","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126181921","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: 17

Multiaccess interference whitening for TH-BPSK IR-UWB systems TH-BPSK IR-UWB系统的多址干扰白化

2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221362

H. Yazdani, A. M. Rabiei, N. Beaulieu

引用次数: 2

GPS-aided Doppler spread estimation in a mobile system gps辅助移动系统的多普勒扩频估计

2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221377

Min Zheng, Kemal Ozdemir

引用次数: 0

Multiple cognitive nodes in wireless sensor networks 无线传感器网络中的多认知节点

2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221381

F. Aalamifar, P. A. Khoozani, M. Ibnkahla

引用次数: 6

Space division multiplexing access aided cognitive radio networks 空间分割多路接入辅助认知无线网络

2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221341

M. Hefnawi

{"title":"Space division multiplexing access aided cognitive radio networks","authors":"M. Hefnawi","doi":"10.1109/QBSC.2012.6221341","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221341","url":null,"abstract":"This paper investigates the performance of space division multiple access (SDMA) schemes in cognitive radio systems (CR) with multiple primary users (PUs) and secondary users (SUs) sharing the same spectrum. By adding more constraints to the conventional SDMA schemes and using the optimization of the Lagrange multipliers we developed an iterative weights calculating method to determine the new cognitive beamforming (BF) vectors for the secondary network. The beamformer is designed to maximize the signal-to-interference plus noise ratio (SINR) at the secondary base station, defined as the ratio of the desired cognitive signal power to the total interference power from all other secondary and primary users, while controlling the interference levels to the PUs. Using simulation, the performance of the conventional SDMA schemes is compared to the constrained one. It is noted that at low SNR the symbol error rate (SER) and the system capacity obtained for the CR system are very close to the ones obtained by the traditional schemes. It is also noted that as we increase the SNR of the CR, the gap between the system capacity of the constrained SDMA scheme and that of the traditional one becomes significant.","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124766928","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: 10

Self-organizing sensor networks: Coverage problem 自组织传感器网络:覆盖问题

2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221358

T. Sheltami, Ashraf S. Hasan Mahmoud, Khalid Alafari, E. Shakshuki

引用次数: 3

A skipped-hop transmission protocol using cooperative communication 一种使用协作通信的跳跃传输协议

2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221346

Tran Trung Duy, H. Kong

引用次数: 0