2010 16th Asia-Pacific Conference on Communications (APCC)最新文献_第5页

Distributed power allocation for efficient inter-cell interference management in multi-cell OFDMA systems 多小区OFDMA系统中有效的小区间干扰管理的分布式功率分配

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679774

Soomin Ko, Hanbyul Seo, Hojoong Kwon, B. Lee

{"title":"Distributed power allocation for efficient inter-cell interference management in multi-cell OFDMA systems","authors":"Soomin Ko, Hanbyul Seo, Hojoong Kwon, B. Lee","doi":"10.1109/APCC.2010.5679774","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679774","url":null,"abstract":"In this paper, we present a new power allocation algorithm called distributed inter-cell power allocation (DIPA) that improves the throughput-fairness trade-off without inter-BS coordination for multi-cell OFDMA systems in fast time-varying environment. In order to preclude the affection of instantaneous channel variation, the DIPA is designed to operate in large time scale (or super-frame) based on the long-term average channel condition, as opposed to the user scheduling which is done in short time scale (or frame) based on the short-term instantaneous channel condition. In addition, to reflect the channel conditions of the multiple users, the DIPA is designed to determine the power allocation preferred by each user individually by using a simplified version of the water-filling scheme and then incorporate the individual power allocations into one policy. According to computer simulations the DIPA algorithm turns out to improve both the cell throughput and cell-boundary users' throughput, and increase the performance gain in the practical systems having irregular cell configuration.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"30 2 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":"116430656","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: 13

D-Proxy: Reliability in wireless networks D-Proxy:无线网络的可靠性

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679750

David Murray, Terry Koziniec, M. Dixon

引用次数: 10

Approximations for distributions of aggregate interference in spectrum sharing systems 频谱共享系统中聚合干扰分布的近似

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5680022

R. Dahama, K. Sowerby, G. Rowe

{"title":"Approximations for distributions of aggregate interference in spectrum sharing systems","authors":"R. Dahama, K. Sowerby, G. Rowe","doi":"10.1109/APCC.2010.5680022","DOIUrl":"https://doi.org/10.1109/APCC.2010.5680022","url":null,"abstract":"In spectrum sharing systems interference to the primary system from unlicensed devices (UDs) can be controlled by defining UD exclusive regions (protection regions) around the primary system. Most previous studies model UDs to be distributed in a Poisson point process outside the protection regions. However, for such systems the distribution of aggregate interference at the primary system cannot be determined and therefore, approximate distributions have been used. Previous studies however, do not analyse whether these approximations lead to underestimation or overestimation of the required size of the protection regions, which in turn causes uncertainty in the safety of the primary system. In this paper, we use lognormal and shifted-lognormal approximations for the distribution of interference, and obtain approximate sizes of the protection regions required to limit the probability of outage of the primary system to specified values. We obtain the exact protection region sizes from Monte Carlo simulations, and compare them with the approximated values, analysing their accuracy and their ability to overestimate protection regions, rather than underestimating. A single one of the two approximations is not suitable to use over the entire range of system parameters considered in this paper. We develop a novel practical approach that uses both the approximations to always generate overestimated protection regions and therefore always keeps the primary system safe.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"221 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":"132066962","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

Performance evaluation and channel modeling of IEEE 802.15.4c in urban scenarios IEEE 802.15.4c在城市场景下的性能评估与信道建模

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5680003

Bingfeng Xia, Qiao Fu, Dong Li, Lin Zhang

{"title":"Performance evaluation and channel modeling of IEEE 802.15.4c in urban scenarios","authors":"Bingfeng Xia, Qiao Fu, Dong Li, Lin Zhang","doi":"10.1109/APCC.2010.5680003","DOIUrl":"https://doi.org/10.1109/APCC.2010.5680003","url":null,"abstract":"The IEEE802.15.4 is a low-bit-rate wireless communicate standard that enables global inter-connectivity and inter-operability amongst Wireless Personal Area Network (WPAN) transceivers from different manufacturers. It is also considered as the PHY and MAC technology for Wireless Sensor Networks, which can be widely used for sensing, gathering and operating information in future smart cities. In Jan. 2009, the 802.15.4c amendment was approved to address the Chinese regulatory changes which have opened new bands for Wireless PAN using within China. However, the urban environments' impacts over its performance in the new band are still not clear. We demonstrate the viability of using IEEE 802.15.4c in urban scenarios by a series of real field experiments and result analysis. Results show that at 4dBm transmission power over 780MHz channel and with typical antenna setups, the effective transmission range is 200 meters in open scenario, 60 and 40 meters in light and heavy traffic scenarios respectively. We also show that the performance is not affected evidently by the mobility of transceivers up to the speed of 80 km/h. The most important performance factors are the availability of line-of-sight between sender and receiver in urban scenarios. We also use the famous Rappaport channel model for field experimental data fitting, and show that the model is valid even with moving massive reflectors. The empirical data and model fitting will benefit upper layer protocol design based on 802.15.4c in China in the future.","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":"130570103","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: 11

Performance evaluation of macro diversity handover technique for multi-hop relay cellular networks 多跳中继蜂窝网络宏分集切换技术性能评价

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679703

J. Sultan, N. Misran, M. Ismail, M. Islam, H. Mohamad

引用次数: 2

Delay diversity for direct sequence spread spectrum system to reduce transmitting power in Rayleigh flat-fading channel 直接序列扩频系统延迟分集降低瑞利平衰落信道的发射功率

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679706

S. Berber, Yu-Lin Tsou, Shudong Fang

引用次数: 0

Available bandwidth estimation for Gbps-class applications using 10-Gbps network interface card's hardware assistance 使用10gbps网络接口卡的硬件辅助进行gbps级应用的可用带宽估计

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679758

K. Shimizu, Katsuhiro Sebayashi, S. Kuwabara, M. Maruyama

{"title":"Available bandwidth estimation for Gbps-class applications using 10-Gbps network interface card's hardware assistance","authors":"K. Shimizu, Katsuhiro Sebayashi, S. Kuwabara, M. Maruyama","doi":"10.1109/APCC.2010.5679758","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679758","url":null,"abstract":"To use network bandwidth more efficiently, an available bandwidth estimation (ABE) algorithm has been extensively studied. An ABE system injects probe packets into networks with defined attributes such as inter-packet gaps (IPGs). Then comparing them in both the sender and receiver provides available bandwidth after analytical processes. Our goals are to construct an useful ABE system for high-speed networks where giga-bit-per-second-class traffic flows. To easily take advantage of the ABE results, we built an ABE system on an off-the-shelf PC to work closely with applications in the same system. An off-the-shelf PC architecture; however, lacks performance required for precise ABE analysis. To break such performance limitations, we implemented hardware assistance, which is useful for accurately controlling probe packet attributes and fine-resolution ABE analysis, in a 10-Gbps network interface card. We evaluated our ABE system in experimental networks with background traffic of Gbps-class video streaming. The results gave an accurate estimation, although there was a tradeoff between accuracy and probe packet disturbance to video streaming.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"17 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":"127311230","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

Impact of reading system information in inbound handover to LTE femtocell 入站切换对LTE移动基站系统信息读取的影响

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679997

Hyung-Deug Bae, N. Park

引用次数: 11

Thai-English spam SMS filtering 泰国-英语垃圾短信过滤

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679770

C. Khemapatapan

引用次数: 6

Topology broadcast in maritime mesh networks with directional antennas - A practical approach 带有定向天线的海洋网状网络中的拓扑广播。一种实用方法

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5680011

S. K. Hazra, W. Seah

引用次数: 1