MILCOM 2008 - 2008 IEEE Military Communications Conference最新文献

Simple, optimal, and robust random access 简单、最优、健壮的随机访问

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-12-01 DOI: 10.1109/MILCOM.2008.4753315

Amir-Hamed Mohsenian-Rad, Jianwei Huang, M. Chiang, V. Wong

引用次数: 0

Directional antenna based time division scheduling in wireless ad hoc networks 无线自组网中基于定向天线的时分调度

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-17 DOI: 10.1109/MILCOM.2008.4753581

Shaohua Li, D. Cho

{"title":"Directional antenna based time division scheduling in wireless ad hoc networks","authors":"Shaohua Li, D. Cho","doi":"10.1109/MILCOM.2008.4753581","DOIUrl":"https://doi.org/10.1109/MILCOM.2008.4753581","url":null,"abstract":"Conventional omni-antenna ad hoc MAC protocols, such as the IEEE 802.11, use RTS/CTS mechanism to avoid collision but waste much space by reserving the wireless media over a large area. Using directional antenna is a good solution to increase spatial reuse, however, packet collision caused by hidden nodes and deafness problem are serious. Recently, many schemes based on directional antenna in ad hoc networks have been proposed, however, most of the schemes have not solved the hidden node and deafness problem completely. In our paper, in order to solve these problem, a node self scheduling based MAC protocol is proposed. For guaranteeing the transmission of data, we let all the nodes overhear control messages at a fixed period periodically. Through utilizing these overhear periods, our proposed scheme can efficiently reduce hidden node problem and the deafness problems, which is a specific problem in directional antenna based network. Through simulation result, we have found that our scheme performs better than conventional protocol in the static Ad hoc network with respect to throughput and end to end delay. That is, our proposed scheme provides a good method to solve the hidden nodes, deafness problem and also reduce much interferences to guarantee the data transmission in wireless Ad hoc networks.","PeriodicalId":434891,"journal":{"name":"MILCOM 2008 - 2008 IEEE Military Communications Conference","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133987888","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: 2

Superposition data transmission for cognitive radios: Performance and algorithms 认知无线电的叠加数据传输:性能和算法

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-17 DOI: 10.1109/MILCOM.2008.4753558

Heejung Yu, Y. Sung, Y. Lee

{"title":"Superposition data transmission for cognitive radios: Performance and algorithms","authors":"Heejung Yu, Y. Sung, Y. Lee","doi":"10.1109/MILCOM.2008.4753558","DOIUrl":"https://doi.org/10.1109/MILCOM.2008.4753558","url":null,"abstract":"For improvement of achievable rate region in cognitive radio channels, a transmission method for secondary users is proposed. At first, the rate region of the sensing based cognitive radio scheme in which secondary users access the channel based on their channel sensing results with sensing error is analyzed. In the multiuser information theory, it is well-known that interference channel cases where both users transmit their own signal simultaneously achieve better rate region than the time-sharing method based on sensing outcomes. Based on this theoretical result, we propose the new transmission scheme in which a secondary transmitter relays primary userpsilas signal with a full-duplex amplify and forward (AF) manner while transmitting its own data at the same time. In the proposed method, we take account of practical implementation issues which are ignored in the theoretical method guaranteeing an upper bound of a rate region. With different geometric locations and power ratios between the relaying signal and the secondary userpsilas one, we evaluate the achievable rate region of the proposed method and compare with those of the conventional ones.","PeriodicalId":434891,"journal":{"name":"MILCOM 2008 - 2008 IEEE Military Communications Conference","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116305545","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

A new band AMC scheme for military use of indoor Mobile WiMAX system 一种新的军用室内移动WiMAX系统频段AMC方案

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-17 DOI: 10.1109/MILCOM.2008.4753543

Woo-Chan Kim, Soo-Yong Jeon, D. Cho

{"title":"A new band AMC scheme for military use of indoor Mobile WiMAX system","authors":"Woo-Chan Kim, Soo-Yong Jeon, D. Cho","doi":"10.1109/MILCOM.2008.4753543","DOIUrl":"https://doi.org/10.1109/MILCOM.2008.4753543","url":null,"abstract":"Indoor wireless communication systems have been developed to improve cell coverage and throughput with low cost in indoor environment. Among several indoor wireless communication systems such as mobile WiMAX (worldwide interoperability for microwave access) system, WPAN (wireless personal area network) and WLAN (wireless local area network), the mobile WiMAX is one of the promising next-generation wireless communication systems and considered for military use by the U.S. Army. In indoor environment, a band AMC mode which is one of subchannel allocation modes in the mobile WiMAX system is mainly used since it is appropriate to the fixed or low mobility environments. However, the conventional band AMC mode is optimized for the outdoor environment, so it will cause many problems in the indoor environment. In this paper, we propose a new band AMC operation suited for the indoor environment. The proposed band AMC operation allocates the resource flexibly in indoor environment and it is compatible with the existing mobile WiMAX standard. The numerical analysis and simulation results show that a channel utilization of the proposed band AMC mode is higher than that of the conventional band AMC mode.","PeriodicalId":434891,"journal":{"name":"MILCOM 2008 - 2008 IEEE Military Communications Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132894505","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: 0

An enhanced multimode power loading algorithm applicable to large dimensional OFDM systems 一种适用于大尺寸OFDM系统的增强型多模功率加载算法

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-17 DOI: 10.1109/MILCOM.2008.4753544

E. Choi, Wan Choi, B. Womack

引用次数: 3

Selective discrete wavelet packet trnasform-based energy detector for cognitive radios 基于选择性离散小波包变换的认知无线电能量检测器

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-17 DOI: 10.1109/MILCOM.2008.4753628

Sunghyun Kim, Youngwoo Yoon, Hyungsu Jeon, Minjae Kim, Hyuckjae Lee

引用次数: 15

The optimal throughput order of wireless ad hoc networks and how to achieve it 无线自组织网络的最优吞吐量顺序及其实现方法

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-16 DOI: 10.1109/MILCOM.2008.4753142

Shirish S. Karande, Zheng Wang, H. Sadjadpour, J. Garcia-Luna-Aceves

引用次数: 2

A general framework for the capacity analysis of wireless ad hoc networks 无线自组织网络容量分析的一般框架

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-16 DOI: 10.1109/MILCOM.2008.4753590

Hyunchul Kim, Zheng Wang, H. Sadjadpour, J. Garcia-Luna-Aceves

{"title":"A general framework for the capacity analysis of wireless ad hoc networks","authors":"Hyunchul Kim, Zheng Wang, H. Sadjadpour, J. Garcia-Luna-Aceves","doi":"10.1109/MILCOM.2008.4753590","DOIUrl":"https://doi.org/10.1109/MILCOM.2008.4753590","url":null,"abstract":"In this paper, we introduce a general framework for computation of throughput capacity of wireless ad-hoc networks under all kinds of information modalities. We consider point-to-point communication for unicast, multicast, broadcast and any type of anycast routing and under physical model assumption. The general communication is denoted as (n, m, k)-cast where n is the number of nodes in the network, m+1 is the number of elements in (n, m, k)-cast group and k(klesm) is the number of destinations that receive packets from the source in each (n, m, k)-cast group. For example, (m=k=1) and (m=k=n) represent unicast and broadcast routings respectively. We demonstrate that the upper bound of throughput capacity is given by O(radicm(radic(nk))-1) bits/second. The lower bound of throughput capacity is computed as Omega(radicm((nkd)(n))-1), Omega((nkd2(n))-1) and Omega(n-1) bits/second when m=O(d-2(n)), Omega(k)=(d-2(n))=O(m) and Omega(d-2(n))=k respectively, where d(n) is a network parameter. The upper bound capacity is achieved based on (n, m, k)-cast tree constructed for routing and transport capacity while the lower bound capacity is achieved based on TDMA scheme and connected cell graph along (n, m, k)-cast tree.","PeriodicalId":434891,"journal":{"name":"MILCOM 2008 - 2008 IEEE Military Communications Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133606703","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: 2

Multiple-access capacity gains using multiuser detection under uniform linear power spacing 在均匀线性功率间隔下使用多用户检测获得多址容量

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-01 DOI: 10.1109/MILCOM.2008.4753357

J. Niedzwiecki, B. Hombs, J. Farkas, Yiftach Eisenberg, J. Tranquilli

引用次数: 3

Analysis of adaptive WRED and CBWFQ algorithms on tactical edge 战术边缘自适应WRED和CBWFQ算法分析

MILCOM 2008 - 2008 IEEE Military Communications Conference Pub Date : 2008-11-01 DOI: 10.1109/MILCOM.2008.4753371

Ming-Jye Sheng, K.I. Park, T. Mak

{"title":"Analysis of adaptive WRED and CBWFQ algorithms on tactical edge","authors":"Ming-Jye Sheng, K.I. Park, T. Mak","doi":"10.1109/MILCOM.2008.4753371","DOIUrl":"https://doi.org/10.1109/MILCOM.2008.4753371","url":null,"abstract":"The military precedence-based assured service (PBAS) has been a prominent topic of discussion for the past several years. Whereas there are no official PBAS requirements for such converged services in the GIG, there is a general consensus that a PBAS capability is needed for the military operation under bandwidth constraint environment and that the associated functions and requirements should be clearly defined and documented. Each of network-centric projects also develops its own unique DSCP plan to support specific PBAS capability. One of the hardest challenges is to support the end-to-end QoS interoperability with different DSCP plans across these networks. This paper provides stochastic models for adaptive WRED and CBWFQ algorithms to analyze delay and throughput of each DSCP flow of a DSCP plan. It is time consuming for network-centric project engineer to use a packet level granularity simulator when investigating the performance and behavior of large and complex networks. This analytical model provides a simple tool to help network engineer understand and manage DSCP plan more effectively in support of various network deployment scenarios.","PeriodicalId":434891,"journal":{"name":"MILCOM 2008 - 2008 IEEE Military Communications Conference","volume":"216 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":"114982044","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