2010 16th Asia-Pacific Conference on Communications (APCC)最新文献_第3页

Compact ultra-wideband metamaterial antenna 紧凑型超宽带超材料天线

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5680013

A. Alhawari, A. Ismail, M. A. Mahdi

{"title":"Compact ultra-wideband metamaterial antenna","authors":"A. Alhawari, A. Ismail, M. A. Mahdi","doi":"10.1109/APCC.2010.5680013","DOIUrl":"https://doi.org/10.1109/APCC.2010.5680013","url":null,"abstract":"A negative index metamaterial antenna is presented in this paper for ultra-wideband (UWB) applications; which operates in C and X-bands. The proposed antenna is composed of three-unit cells of left-handed metamaterial (LHM) where these LHM unit cells are composed of a combination of modified octagonal spiral resonator (OSR), octagonal split-ring resonator (OSRR), capacitance-loaded strip (CLS), and wire that exhibit negative electrical permittivity (ɛ) and negative magnetic permeability (μ) simultaneously. A trident-shaped feeding strip is used to feed all the three LHM unit cells respectively; which are united into a single line feeding strip on top of substrate surface, whereas the wire and ground plane are deposited in the bottom of substrate surface. By using of these techniques, we were able to produce an antenna solely from metamaterial that is for the first time used in antenna design. Return loss simulation showed that this antenna achieves 94% bandwidth for VSWR < 2 over the frequency band of 4.8–13.4 GHz, with a maximum gain of 2.7 at 11 GHz. The far-field radiation patterns, which show good Omnidirectional performance, are also discussed here.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"30 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":"134449103","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

Dynamic Time based Burst Assemble scheme to reduce energy consumption in OBS network with Low-Power Idle 基于动态时间的突发组合方案在低功耗空闲状态下降低OBS网络的能耗

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679761

Dong-Ki Kang, Won-Hyuk Yang, Jae-Young Lee, Young-Chon Kim

引用次数: 6

Investigation on resource assignment and power control schemes for uplink MU-MIMO in multi-cell environments for LTE/LTE-advanced LTE/LTE-advanced多小区环境下上行MU-MIMO资源分配与功率控制方案研究

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679713

Daisuke Nishikawa, T. Kawamura, Y. Kishiyama, Takehiro Nakamura

{"title":"Investigation on resource assignment and power control schemes for uplink MU-MIMO in multi-cell environments for LTE/LTE-advanced","authors":"Daisuke Nishikawa, T. Kawamura, Y. Kishiyama, Takehiro Nakamura","doi":"10.1109/APCC.2010.5679713","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679713","url":null,"abstract":"This paper investigates capacity gains for uplink multi-user (MU)-MIMO in a multi-cell environment with single-carrier frequency division multiple access (SC-FDMA) used in LTE/LTE-Advanced. In the SC-FDMA MU-MIMO uplink, contiguous resource blocks (RBs) must be assigned in the frequency domain to each user in order to retain the SC-FDMA property, and the same bandwidth, i.e., the same set of RBs, needs to be assigned to the users that are simultaneously multiplexed in the spatial domain to utilize the inter-user orthogonality of demodulation reference signals. Furthermore, in a multi-cell environment, cell-edge users in particular cause severe fluctuation in inter-cell interference, which also depends on the number of simultaneously multiplexed users in MU-MIMO operation. To alleviate these problems, this paper proposes efficient resource assignment and transmission power control schemes to improve cell throughput without degrading the cell-edge user throughput. Based on system-level simulations, we show that by using the proposed schemes, the cell throughput performance achieved via uplink MU-MIMO is increased by approximately 20% and 40%, for 1-by-4 and 2-by-8 uplink antenna configurations, respectively, with almost the same cell-edge user throughput as that of the single-user MIMO case.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"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":"117325085","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

Transmission scheduling for PHY-layer wireless network coding 物理层无线网络编码的传输调度

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679717

H. Yomo, M. Bandai, Takashi Watanabe, S. Obana

{"title":"Transmission scheduling for PHY-layer wireless network coding","authors":"H. Yomo, M. Bandai, Takashi Watanabe, S. Obana","doi":"10.1109/APCC.2010.5679717","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679717","url":null,"abstract":"This paper addresses a transmission scheduling for wireless multi-hop network employing physical layer wireless network coding (PL-WNC). With PL-WNC, two distant nodes first transmit packets to an intermediate relay simultaneously, which then amplifies and forwards the received signal. The destination nodes decode the desired signals by using the a priori information which are their own packets or packets overheard from the other nodes. The achievable performance of PL-WNC depends not only on traffic pattern within a network but also on the probability for each destination node to have the a priori information for decoding the desired information. In this paper, we introduce a scheduling strategy for PL-WNC, which decides source-destination pairs of PL-WNC, taking account of traffic pattern as well as overhearing probability among nodes. The selected sources transmit packets only when the destinations are expected to have the a priori information with high probability. We define a parameter for each source node to decide whether it should transmit a packet when scheduled, and investigate its impact on the achievable throughput. Our simulation results show that our proposed scheduling significantly improves throughput of PL-WNC.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"272 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":"115245368","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

Effects of time-to-trigger parameter on handover performance in SON-based LTE systems 触发时间参数对基于son的LTE系统切换性能的影响

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5680001

Yejee Lee, Bongjhin Shin, Jaechan Lim, Daehyoung Hong

{"title":"Effects of time-to-trigger parameter on handover performance in SON-based LTE systems","authors":"Yejee Lee, Bongjhin Shin, Jaechan Lim, Daehyoung Hong","doi":"10.1109/APCC.2010.5680001","DOIUrl":"https://doi.org/10.1109/APCC.2010.5680001","url":null,"abstract":"In this paper, we evaluate handover (HO) performance when we apply various time-to-trigger (TTT) methods in self-organizing network (SON)-based long term evolution (LTE) systems. Although TTT can mitigate the wasteful ping-pong HO effect, it also can cause undesirable radio link failure (RLF) due to delayed HO. The optimal HO timings that produce the lowest ping-pong rate within allowable RLF rate vary depending on user equipment (UE) speeds and neighboring cell configurations. To achieve efficient HO timings, we propose and investigate two methods: “adaptive” and “grouping.” In the “adaptive method,” we select the adaptive TTT value for each UE speed based on RLF rate of 2%. The “grouping method” classifies UE speeds into three ranges and assigns the proper TTT value to each range. To apply the LTE specification more effectively, we suggest the criteria of grouping, and propose the proper TTT value for each range. We consider HO in two neighboring cell configurations: from a macro cell to either a macro cell or a pico cell. Simulation results show that the HO performance of the “adaptive method” is greatly improved compared to that of applying fixed TTT values. The results also show that the performance of the “grouping method”, using proposed criteria and proper TTT values, is comparable to that of the “adaptive method.”","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"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":"122903192","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: 91

Experimental evaluation of multiple signal identification based on cyclostationarity in spectrum sharing scenarios 频谱共享场景下基于循环平稳性的多信号识别实验评估

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679693

H. Harada, H. Fujii, S. Miura, T. Ohya

{"title":"Experimental evaluation of multiple signal identification based on cyclostationarity in spectrum sharing scenarios","authors":"H. Harada, H. Fujii, S. Miura, T. Ohya","doi":"10.1109/APCC.2010.5679693","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679693","url":null,"abstract":"An important and widely used detection technique is cyclostationarity-based feature detection because the method does not require prior information such as the signal bandwidth or frame format, and time and frequency synchronization are likewise not required. The problem with conventional cyclostationarity-based feature detection is that the detection probability of weak signals degrades if multiple signals with different received-power levels are captured simultaneously. Multiple signal identification has been studied in order to solve such a problem. The iterative detection method suppresses the effects of previously-detected signals in the cyclic auto-correlation domain, and so improves the detection probability of weak signals. In this paper, the multiple signal identification method is evaluated based on testbed experiments. In addition, the modification of the multiple signal identification method in which the effects of other signals are previously-relieved is proposed and applied to the testbed instead of the iterative detection method. The detection performance levels of the conventional and proposed detection methods are evaluated and compared to the results of computer simulations. The results reveal the effectiveness of the proposed detection method in spectrum sharing scenarios.","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":"130106981","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

Improved multicanonical algorithm for outage probability estimation in MIMO channels MIMO信道中断概率估计的改进多范式算法

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679720

P. Wijesinghe, U. Gunawardana, R. Liyanapathirana

引用次数: 2

From macrocell to microcell system to offer road communication to vehicle 从宏蜂窝到微蜂窝系统为车辆提供道路通信

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679749

Takahiko Yamada, P. T. Hoa

{"title":"From macrocell to microcell system to offer road communication to vehicle","authors":"Takahiko Yamada, P. T. Hoa","doi":"10.1109/APCC.2010.5679749","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679749","url":null,"abstract":"In future, mobile multimedia services will become popular as widely as the use of the cellular phone today. It makes the bandwidth required for each multimedia service increase rapidly, and such kind of communication will be dominant since the development of machine-machine communications for human interactivity in the multimedia age. For this demand, the micro-cell will become a major role in substitution of the macro-cell. This paper proposes a new paradigm of mobile network system where a virtual single cell over connected micro-cells used to release the traffic load of macro-cells, and an IP-based paging network offering mobile users the seamless connection between networks through vertical handover functionality. New connected micro-cells network is to support vehicular users the broadband mobile services like mobile tele-medicine, teleconferences, online-game, etc and can be used for ITS (Intelligent Transport System) and shares the traffic load with the Macro-cell network. In order to become feasible, the first important issue need to be solved is mobility management because it is supposed to server for fast moving terminals. This paper also presents the virtual single cell mechanism; an LMC (Logical Macro Cell) and multi-polling to LMC to make resource reservation to adapt to quick change of access points of fast MT. Performance of achievements is reported to evaluate our proposal.","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":"115790335","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 analysis of the P2P traffic characteristics on file transfers between prefectures and between Autonomous Systems in the Winny network Winny网络中县际和自治系统间文件传输的P2P流量特征分析

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679754

Takashi Koizumi, Masahiro Yoshida, S. Ohzahata, K. Kawashima

{"title":"An analysis of the P2P traffic characteristics on file transfers between prefectures and between Autonomous Systems in the Winny network","authors":"Takashi Koizumi, Masahiro Yoshida, S. Ohzahata, K. Kawashima","doi":"10.1109/APCC.2010.5679754","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679754","url":null,"abstract":"Peer-to-peer (P2P) file-sharing applications are now widely used. The traffic generated by the P2P applications occupies a significant proportion of Internet traffic, and has an enormous impact on the backbone networks. Since these peers communicate by constructing virtual overlay routes, which are constructed independently from the IP networks topology, the characteristics of P2P traffic between regional networks such as those in prefectures and Autonomous Systems (ASs) have become an important issue. Consequently, it is necessary to understand the actual status of the characteristics of traffic matrices in order to construct and manage future networks. In this paper, we measured and analyzed the file transfer characteristics, such as traffic matrices, between prefectures and between ASs, by identifying file transfers between peers in Winny network, one of the most popular P2P applications in Japan. The results reveal that Winny increases traffic between prefectures and ASs, because file transfers in Winny network does not take account of locality.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"62 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":"121274742","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

Performance evaluation of the vehicular ad-hoc network using the modified binary countdown scheme 基于改进二进制倒计时方案的车载自组网性能评价

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679705

K. Hashiura, H. Habuchi

引用次数: 5