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Channel feedback reduction schemes for opportunistic scheduling in multicast OFDMA systems 多播OFDMA系统中机会调度的信道反馈缩减方案
2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679772
Soomin Ko, Yung-Jun Yoo, B. Lee
{"title":"Channel feedback reduction schemes for opportunistic scheduling in multicast OFDMA systems","authors":"Soomin Ko, Yung-Jun Yoo, B. Lee","doi":"10.1109/APCC.2010.5679772","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679772","url":null,"abstract":"In this paper, we present new feedback reduction schemes that reduce the feedback load needed for opportunistic scheduling in the multicast OFDMA system. Considering the characteristics of the multicast system that the feedback of the user with the poorest channel condition dictates the transmission rate, we designed the proposed schemes such that it can reduce the total feedback load by sacrificing the feedback of the users with good average channel condition. Specifically, the BS divides the users into two disjoint sets, i.e., the set consisting of the users with poor average channel condition and that consisting of the users with good average channel condition, and makes the users in the former set feed back fine-grained condition of the channels while the users in the latter set feed back coarse-grained condition of the channels. Numerical results reveal that the proposed schemes reduce the total feedback load substantially with a marginal loss of the throughput.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130926807","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
Parametric Protocol for Energy Efficient Cluster Head Selection (PPEECS) in WSNs 无线传感器网络中高效簇头选择的参数化协议
2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679765
M. Khulbe, P. Srivastava, R. Jain
{"title":"Parametric Protocol for Energy Efficient Cluster Head Selection (PPEECS) in WSNs","authors":"M. Khulbe, P. Srivastava, R. Jain","doi":"10.1109/APCC.2010.5679765","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679765","url":null,"abstract":"Energy Efficient Routing is a crucial issue in Wireless sensor networks (WSNs). This paper proposes a novel algorithm, Parametric Protocol for Energy Efficient Cluster Head Selection (PPEECS) in WSN, which consists of two phases; Region formation phase and Cluster Head (CH) selection phase. In prior phase we divide the network into several regions depending upon node density distribution. The later phase allocates a CH per region. The CH selection depends upon relevant parameters related to energy dissipation of nodes. This routing protocol increases the overall lifetime of the network by uniform and effective energy utilization. Simulations show that PPEECS increases network lifetime by all metrics i.e. FND (First Node Dies) by 22%, HNA (Half of the Nodes Alive) by 60% and LND (Last Node Dies) by 50% when compared with an existing protocol, LEACH. Also, PPEECS has a better network lifetime when compared with multihop-LEACH; FND -74%, HNA - 53% and LND - 43 %.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132275464","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
A novel femtocell open access mechanism in the uplink in the CDMA system 在CDMA系统的上行链路中提出了一种新的移动基站开放接入机制
2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679747
Ben Niu, Yunzhou Li, Xiaofeng Zhong, Shidong Zhou
{"title":"A novel femtocell open access mechanism in the uplink in the CDMA system","authors":"Ben Niu, Yunzhou Li, Xiaofeng Zhong, Shidong Zhou","doi":"10.1109/APCC.2010.5679747","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679747","url":null,"abstract":"The femtocell is a recommended solution to the indoor coverage and throughput problem. In this paper, we study a scenario with only one femtocell access point, one subscriber and N nonsubscribers in CDMA system. Considering the limitation of the backhaul throughput and all the users' benefits, we design a novel femtocell open access mechanism based on the greedy algorithm. The analysis and simulations suggest that our mechanism brings profit to both the subscribers and the nonsubscribers, and increases the system throughput at the same time. The simulations also imply that this flexible mechanism outperforms closed access and hybrid access mechanisms.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127850844","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
Efficient sensor node deployment schemes for AOFSN AOFSN中高效的传感器节点部署方案
2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679994
Li-Mei Peng, Chan-Hyun Youn, Xin-Wan Li
{"title":"Efficient sensor node deployment schemes for AOFSN","authors":"Li-Mei Peng, Chan-Hyun Youn, Xin-Wan Li","doi":"10.1109/APCC.2010.5679994","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679994","url":null,"abstract":"In this paper, the sensor node deployment schemes are studied for the all optical fiber sensor networks (AOFSN). Sensor node deployment strategy is very crucial to the sensing efficiency in terms of the high sensing accuracy and low sensing cost, etc. High sensing accuracy requires high coverage ratio and low blind ratio, while low sensing cost requires fewer amounts of sensor nodes/switches and low overlapping ratio. Given the above requirements, we apply the concept of close packing and propose two-dimensional Close-Packing based Sensor node Deployment (2-D CPSD) scheme, and the two-dimensional Closest-Packing Sensor node Deployment (2-D CestPSD) scheme. Then the CestPSD scheme is extended to a three-dimensional application and is named as 3-D CestPSD. The AOFSN applying the 2-D/3-D CestPSD schemes can obtain the maximum coverage, minimum blind ratio under the premise of maintaining no overlapping ratio between any two nodes' sensing range. The network performances are numerically analyzed and compared with some other node distribution schemes in terms of coverage ratio, overlapping ratio, blind ratio, and node density.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124610207","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
Relaying MIMO for cooperative mobile networks 合作移动网络中继MIMO
2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679704
Nafis Imtiaz Zaman, T. Kanakis, P. Rapajic
{"title":"Relaying MIMO for cooperative mobile networks","authors":"Nafis Imtiaz Zaman, T. Kanakis, P. Rapajic","doi":"10.1109/APCC.2010.5679704","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679704","url":null,"abstract":"Relay networks achieve high performance by utilizing cooperation between nodes that can be classified as multi-hop networks and cooperative MIMO relaying networks. Cooperative diversity is a transmission technique to overcome fading, multipath and inter-channel interference. As an important part of “spatial diversity” systems, cooperative diversity involving multi hop data relays is a solution to improve propagation performance, expanding coverage and enhancing system capacity in such wireless environments. In a cooperative diversity system, the “third party” mobile devices acting as relays to help the main transmission link for improving the performance such as bit error rate (BER), data rate, coverage. This paper is a study of analyzing the system performance for MIMO-Relaying MIMO in different wireless channel and results show the better performance of cooperative communication.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125070632","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
Smarter searching for a network packet database 更智能地搜索网络数据包数据库
2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5680009
W. Kenworthy
{"title":"Smarter searching for a network packet database","authors":"W. Kenworthy","doi":"10.1109/APCC.2010.5680009","DOIUrl":"https://doi.org/10.1109/APCC.2010.5680009","url":null,"abstract":"Bioinformatics has developed some very sophisticated algorithms used for searching within the large amounts of data produced by sequencing projects. Introduced here is a method that leverages these algorithms for processing computer network data traffic to find and classify information in a way that avoids many of the operations that are required of more traditional methods of processing network data packets. It can be used to avoid processing the data through a protocol stack in order to extract the content to make it ready for searching as well as being able to a access the advanced search capabilities developed for biological data. Raw data (for example whole Ethernet packets or strings/ motifs) can be directly searched for within a database of structure signatures to indicate packets of interest via structures within the query packet. The structures referred to here are the “patterns of patterns” within the data. This paper describes the results obtained by creating a searchable database based on bioinformatics techniques and searching it using sample data.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122009972","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
Single and Dual physical link failures stability effect on degree three WDM networks 单、双物理链路故障对三级WDM网络稳定性的影响
2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5680021
J. Gutierrez, T. Riaz, J. Pedersen, O. Madsen, K. Georgakilas, K. Katrinis, A. Tzanakaki
{"title":"Single and Dual physical link failures stability effect on degree three WDM networks","authors":"J. Gutierrez, T. Riaz, J. Pedersen, O. Madsen, K. Georgakilas, K. Katrinis, A. Tzanakaki","doi":"10.1109/APCC.2010.5680021","DOIUrl":"https://doi.org/10.1109/APCC.2010.5680021","url":null,"abstract":"This paper studies the effects of Single and Dual physical link failures to the stability of WDM networks when deployed as regular 3-degree structures. The failure impact on the source-destination pair connections is evaluated for the different topology scenarios. In this way it is possible to provide an overview of the failure effects and their relation to network metrics such as availability or cost. The results quantify how much the different network interconnection designs are affected by Single and Dual Physical link failures. The case study treats a realistic scenario, the interconnection of the NSFNET topology nodes. The main conclusions show that, when networks are designed under the same conditions, there is a linear relation between average downtime and ratio of connections affected by failures. Moreover, the most expensive optimized topologies to deploy provide higher availability.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128986235","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
A modulation recognition method based on carrier frequency estimation and decision theory 一种基于载波频率估计和决策理论的调制识别方法
2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5680015
Xudong Liu, Jinzhao Su, Wei Wu
{"title":"A modulation recognition method based on carrier frequency estimation and decision theory","authors":"Xudong Liu, Jinzhao Su, Wei Wu","doi":"10.1109/APCC.2010.5680015","DOIUrl":"https://doi.org/10.1109/APCC.2010.5680015","url":null,"abstract":"This paper concerns modulation recognition for blind modulated signals. We use the decision theory, which is popularly used in most researches, to discriminate eleven analog and digital modulated signals with nine key parameters. The carrier frequency is important to calculate some other key parameters. However, for the blind signals, the carrier frequency is unknown, so we propose a method for estimating carrier frequency based on a short frame of intermediate frequency signals. Simulations for different types of analog and digital signals corrupted by band-limited Gaussian White Noise have been carried out. The results show that all types of modulated signals can be determined with success rate greater than 95% when SNR is higher than 10dB.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129725479","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: 5
Potential throughput based access point selection 基于接入点选择的潜在吞吐量
2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679995
Suhua Tang, N. Taniguchi, O. Shagdar, M. Tamai, H. Yomo, Akio Hasegawa, T. Ueda, R. Miura, S. Obana
{"title":"Potential throughput based access point selection","authors":"Suhua Tang, N. Taniguchi, O. Shagdar, M. Tamai, H. Yomo, Akio Hasegawa, T. Ueda, R. Miura, S. Obana","doi":"10.1109/APCC.2010.5679995","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679995","url":null,"abstract":"Mobile nodes in wireless LANs connect themselves to the Internet via their associated access points (AP). Although more and more APs are being deployed, nodes tend to gather around some common hotspots, contending for few APs and leaving other APs idle. The traffic unbalance affects both per-node throughput and network throughput. In this paper, we aim to solve this problem by AP selection. We jointly consider the two key factors—channel availability and link quality—that determine the achievable throughput of a node, and suggest the potential throughput (PT) metric for AP selection. The PT metric is defined as the maximal throughput that can be achieved by a node if it exclusively occupies the remaining idle channel. In this way, a node can achieve higher throughput by associating with a farther but less used AP and the congestion of the network can be alleviated. The simulation results show that the PT metric can greatly improve the total throughput when nodes are unevenly distributed around APs. The testbed experiments with the off-the-shelf WLAN cards also confirm that the per-node throughput can be effectively improved with the proposed method.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"245 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125784664","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
Space frequency block coding with grouped phase rotation for asymmetric MIMO-OFDM system 非对称MIMO-OFDM系统的分组相位旋转空间频率分组编码
2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679715
A. Nakajima, Kenichiro Tanaka, Akinori Ohashi, Hiroshi Hattori, A. Okazaki, H. Kubo
{"title":"Space frequency block coding with grouped phase rotation for asymmetric MIMO-OFDM system","authors":"A. Nakajima, Kenichiro Tanaka, Akinori Ohashi, Hiroshi Hattori, A. Okazaki, H. Kubo","doi":"10.1109/APCC.2010.5679715","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679715","url":null,"abstract":"To improve quality of wireless communication, transmit/receive diversity techniques in multiple-input multiple-output (MIMO) system have been investigated vigorously. In this paper, we consider an asymmetric MIMO orthogonal frequency division multiplexing (MIMO-OFDM) system in the case of high speed mobility for frequency-selective fading channel. For conventional schemes, e.g., cyclic delay diversity (CDD), space-time/space-frequency block coding (STBC/SFBC), and quasi orthogonal STBC/SFBC (QOSTBC/QOSFBC), it is difficult to obtain high channel quality while keeping high data rate and low computational complexity of demodulation in asymmetric MIMO-OFDM system. Therefore, in this paper, we propose a joint use of SFBC and grouped phase rotation (GPR), and evaluate the average bit error rate (BER) performances by computer simulation.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116828434","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
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