2011 International Conference on Communications and Information Technology (ICCIT)最新文献_第3页

WiMax: Cross layer bandwidth allocation Strict Priority Based Adaptive Modulation and Coding WiMax:跨层带宽分配严格优先级自适应调制和编码

2011 International Conference on Communications and Information Technology (ICCIT) Pub Date : 2011-03-29 DOI: 10.1109/ICCITECHNOL.2011.5762697

Ihsan Shahwan, Ali Muhammed, Muath A. Obaidat, R. Dorsinville

{"title":"WiMax: Cross layer bandwidth allocation Strict Priority Based Adaptive Modulation and Coding","authors":"Ihsan Shahwan, Ali Muhammed, Muath A. Obaidat, R. Dorsinville","doi":"10.1109/ICCITECHNOL.2011.5762697","DOIUrl":"https://doi.org/10.1109/ICCITECHNOL.2011.5762697","url":null,"abstract":"Scheduling is a fundamental component in resource (bandwidth and power) management in NG wireless networks and plays the main role in providing QoS requirements such as delay, throughput and packet loss for different classes of service in 802.16d networks. In this paper we propose a novel scheduling algorithm Strict Priority Based Adaptive modulation and Coding (SP_AMC_Based) that can grantee QoS between different connections belong to different users by the means of cross layer design between MAC and PHY layers in the process of bandwidth allocation to the contrary of most existing protocols that are base solely on MAC layer. Without loss of generality, the protocol serves a number of users with different connections (flows) that have different QoS requirements. The scheduler considers user current channel condition, connection QoS requirement and packet delay to select a user to be scheduled. The proposed scheduling algorithm is investigated through simulation and performance comparison with WFQ[1] scheduler. The results show a better performance of the proposed scheduler compared with WFQ algorithm.","PeriodicalId":211631,"journal":{"name":"2011 International Conference on Communications and Information Technology (ICCIT)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121441823","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

Tunable multi-wavelength SOA based linear cavity fiber laser source for optical communications applications 用于光通信应用的可调谐多波长SOA线性腔光纤激光源

2011 International Conference on Communications and Information Technology (ICCIT) Pub Date : 2011-03-29 DOI: 10.1109/ICCITECHNOL.2011.5762701

M. Ummy, N. Madamopoulos, R. Dorsinville

引用次数: 4

Relational universal index structure for evaluating XML twig queries 用于评估XML分支查询的关系通用索引结构

2011 International Conference on Communications and Information Technology (ICCIT) Pub Date : 2011-03-29 DOI: 10.1109/ICCITECHNOL.2011.5762659

Samir Mohammad, Patrick Martin, W. Powley

引用次数: 3

Adaptive Parallel Concatenation Turbo Codes for Wireless Sensor Networks 无线传感器网络的自适应并行串接Turbo码

2011 International Conference on Communications and Information Technology (ICCIT) Pub Date : 2011-03-29 DOI: 10.1109/ICCITECHNOL.2011.5762675

Nashat Abughalieh, K. Steenhaut, A. Nowé

{"title":"Adaptive Parallel Concatenation Turbo Codes for Wireless Sensor Networks","authors":"Nashat Abughalieh, K. Steenhaut, A. Nowé","doi":"10.1109/ICCITECHNOL.2011.5762675","DOIUrl":"https://doi.org/10.1109/ICCITECHNOL.2011.5762675","url":null,"abstract":"Wireless Sensor Networks (WSNs) consist of a set of small devices with limited energy resources, reduced processing capabilities and a radio frequency communication unit with limited transmission power. In some applications, wireless channels between nodes are prone to high noise and interference, where Automatic Repeat Request (ARQ) techniques are inefficient for the power loss in packets retransmissions. Error Correcting Codes (ECC) can be used to reduce the number of retransmissions. The high processing power and processing time of ECC powerful decoders make it unsuitable to be implemented in sensor nodes. Simple ECC techniques come with high redundancy in the transmitted packets and low correction ability. In this paper we present a powerful ECC technique for sensor networks based on Parallel Concatenation Turbo Codes. The soft-decision iterative decoder is implemented at the base station and a low power turbo encoder and error correction circuit are implemented at the sensor nodes. This approach enhances the reliability of the network communications, while being energy- and delay efficient. We also tested effect of increasing number of communication hops and variant interleaver memory sizes.","PeriodicalId":211631,"journal":{"name":"2011 International Conference on Communications and Information Technology (ICCIT)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125094507","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

Navigation system based DTN routing in sparse vehicular networks 稀疏车辆网络中基于DTN路由的导航系统

2011 International Conference on Communications and Information Technology (ICCIT) Pub Date : 2011-03-29 DOI: 10.1109/ICCITECHNOL.2011.5762673

H. Higaki

引用次数: 4

Visual management of workflows in web development frameworks web开发框架中工作流的可视化管理

2011 International Conference on Communications and Information Technology (ICCIT) Pub Date : 2011-03-29 DOI: 10.1109/ICCITECHNOL.2011.5762699

M. Karam, H. Safa, H. Mneimneh, J. Dargham, H. Mcheick

引用次数: 2

Service Oriented Manager in Grid system 网格系统中面向服务的管理器

2011 International Conference on Communications and Information Technology (ICCIT) Pub Date : 2011-03-29 DOI: 10.1109/ICCITECHNOL.2011.5762677

Entisar S. Alkayal, F. Essa

引用次数: 0

A visual system for automatically recommending alternative link structures for web pages 为网页自动推荐可供选择的链接结构的可视化系统

2011 International Conference on Communications and Information Technology (ICCIT) Pub Date : 2011-03-29 DOI: 10.1109/ICCITECHNOL.2011.5762680

H. Ramadhan, A. Al-Hosni

引用次数: 0

Evaluating the QoS of WLANs for the IEEE 802.11 EDCF in real-time applications 基于IEEE 802.11 EDCF的无线局域网实时应用的QoS评估

2011 International Conference on Communications and Information Technology (ICCIT) Pub Date : 2011-03-29 DOI: 10.1109/ICCITECHNOL.2011.5762689

R. Qashi, Martin Bogdan, K. Hanssgen

引用次数: 11

On the scalability of wireless multi-hop broadcast protocols with respect to density in VANET 论VANET中无线多跳广播协议的密度可扩展性

2011 International Conference on Communications and Information Technology (ICCIT) Pub Date : 2011-03-29 DOI: 10.1109/ICCITECHNOL.2011.5762702

M. Slavik, I. Mahgoub

{"title":"On the scalability of wireless multi-hop broadcast protocols with respect to density in VANET","authors":"M. Slavik, I. Mahgoub","doi":"10.1109/ICCITECHNOL.2011.5762702","DOIUrl":"https://doi.org/10.1109/ICCITECHNOL.2011.5762702","url":null,"abstract":"Multi-hop wireless broadcast is a critical component in ad-hoc wireless networks. Vehicular Ad-hoc Networks (VANET) in particular utilize broadcast as a primary communication mechanism in many applications. Such networks exhibit situations of very high node densities so it is important that the broadcast protocols used to support applications on these networks scale well to high densities. This work evaluates existing broadcast protocols in terms of this scalability using both a high-level simulation assuming an ideal medium (WiBDAT) and a standard detailed wireless simulation (JiST/SWANS). Four broadcast methods and protocols, each having been used as a forwarding node selection algorithm in VANET, are chosen for evaluation: stochastic broadcast, distance method, Advanced Adaptive Gossiping (AAG), and Multi-Point Relaying (MPR). Results show a distinct performance difference in terms of rebroadcast efficiency at high densities. Protocols using network topology information, AAG and MPR, become inefficient at high densities. Stochastic broadcast and the distance method, which use neighbor count directly to calculate retransmit thresholds, are shown to be highly adaptive to node density.","PeriodicalId":211631,"journal":{"name":"2011 International Conference on Communications and Information Technology (ICCIT)","volume":"113 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133969492","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