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2005 Asia-Pacific Conference on Communications最新文献

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The application of piggybacking technique in Ad hoc WLAN 搭载技术在Ad hoc无线局域网中的应用
2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554126
Sun Qiang, Liu Tong-pei, Chen Hui-ming
{"title":"The application of piggybacking technique in Ad hoc WLAN","authors":"Sun Qiang, Liu Tong-pei, Chen Hui-ming","doi":"10.1109/APCC.2005.1554126","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554126","url":null,"abstract":"The technique of piggybacking reserved contention window is applied to EDCA mechanism of 802.11e in this paper, and a simple and practical algorithm is provided to maintain the stack table. The simulation results show that it can further enhance the QoS performance of ad hoc wireless local area network when the network is in the high load","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132814029","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
Low Latency Algorithms of Iterative Codes for Wireless Broadband Communication Systems 无线宽带通信系统中迭代码的低延迟算法
2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554157
D. Choi, J. Jeong, Ji-Won Jung
{"title":"Low Latency Algorithms of Iterative Codes for Wireless Broadband Communication Systems","authors":"D. Choi, J. Jeong, Ji-Won Jung","doi":"10.1109/APCC.2005.1554157","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554157","url":null,"abstract":"This paper presents low latency and computation algorithms of iterative codes such as turbo codes, turbo product codes (TPC), and low density parity check (LDPC) codes for use in wireless broadband communication systems. Due to high coding complexity of iterative codes, this paper focus on lower complexity and/or latency algorithms that are easily implementable in hardware To reduce the latency, this paper proposes some kinds of low latency algorithm for each iterative codes","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134322018","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
Intelligent Photonic Network System Based on Optical Cross Connect and Overlay Model 基于光交叉连接和叠加模型的智能光子网络系统
2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554103
Y. Koike, T. Toide, A. Sutoh, M. Murakami, K. Oda
{"title":"Intelligent Photonic Network System Based on Optical Cross Connect and Overlay Model","authors":"Y. Koike, T. Toide, A. Sutoh, M. Murakami, K. Oda","doi":"10.1109/APCC.2005.1554103","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554103","url":null,"abstract":"We developed a carrier-based photonic cross connect system, which has an automatic light wave path setting function and a network management function. This system is also based on the overlay model in which the topologies between the client network element (NE) layer and carrier's optical cross connect (OXC) layer are independently processed. Signaling between client NEs and the OXCs enabled automatic optical path setting between two client NEs through a OXC network. The system also supports connections specified in the ITU-T standard of automatic switched transport network (ASTN), namely permanent connection (PC), soft permanent connection (SPC) and switched connection (SC). Moreover, we implemented integrated optical network management including optical transport network (OTN) management and control plane (C-plane) management. There is a high expectation that our system will accommodate increased Internet traffic demand and reduce network operation costs of Internet service providers (ISP) and carriers in the near future","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"506 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133500779","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
On Temporal Smoothing for Two-Dimensional Direction-of-Arrival Estimation of Coherent Signals in Multiplicative/Additive Noises Environment 乘加噪声环境下相干信号二维到达方向估计的时间平滑方法
2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554031
Hong Jiang, Shuxun Wang
{"title":"On Temporal Smoothing for Two-Dimensional Direction-of-Arrival Estimation of Coherent Signals in Multiplicative/Additive Noises Environment","authors":"Hong Jiang, Shuxun Wang","doi":"10.1109/APCC.2005.1554031","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554031","url":null,"abstract":"In this paper, temporal smoothing technology is extended for solving two-dimensional (2-D) direction-of-arrival (DOA) estimation of coherent signals problem in multiplicative/additive noises environment. To detect the signals of interest (SOIs) from complicated noises and interferences, a 2-D DOA estimation algorithm is firstly proposed exploiting third-order cyclic moment of cyclostationary signals. Due to the more rapid changes of multipath reflection coefficients than their DOAs in real wireless scenarios, temporal smoothing to resolve multiple directions of coherent signals is considered, which is helpful in solving the angle ambiguity problem in 2-D estimation case using a planar array. Compared with spatial smoothing based 2-D method, in which multiple sub-planar array structure need to be grouped, the proposed method has less complexity and further array aperture extension. Also, it can detect SOIs, suppress multiplicative/additive stationary noises and remove interfering signal with different cyclic frequency","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130309023","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: 7
Analytical Approach for Maximizing the Average Code Rate of Incremental Redundancy Schemes 最大化增量冗余方案平均码率的解析方法
2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554106
E. Uhlemann, L. Rasmussen
{"title":"Analytical Approach for Maximizing the Average Code Rate of Incremental Redundancy Schemes","authors":"E. Uhlemann, L. Rasmussen","doi":"10.1109/APCC.2005.1554106","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554106","url":null,"abstract":"An analytical design procedure for maximizing the average code rate of incremental redundancy retransmission schemes is presented. Union bounds are used as the tool to select good puncturing patterns and to obtain bounds on frame error rate for the punctured codes. This, in turn, is used for determining the optimal packet size of each retransmission, so that the average code rate is maximized","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122947027","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
Design of a CMOS Highly Linear Channel-Select Filter and Programmable Gain Amplifier for a WPAN Zero-IF Receiver 用于WPAN零中频接收机的CMOS高线性通道选择滤波器和可编程增益放大器的设计
2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554099
Yeon-kug Moon, H. Seo, Yong-Kuk Park, Kwang-Ho Won, Myunghyun Yoon, Jun-Jae Yoo, Seong-Dong Kim
{"title":"Design of a CMOS Highly Linear Channel-Select Filter and Programmable Gain Amplifier for a WPAN Zero-IF Receiver","authors":"Yeon-kug Moon, H. Seo, Yong-Kuk Park, Kwang-Ho Won, Myunghyun Yoon, Jun-Jae Yoo, Seong-Dong Kim","doi":"10.1109/APCC.2005.1554099","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554099","url":null,"abstract":"This paper describes a low-voltage and low-power channel selection analog front end with continuous-time low pass filters and highly linear programmable-gain amplifier (PGA). The filters were realized as balanced Gm-C biquadratic filters to achieve a low current consumption. High linearity and a constant wide bandwidth are achieved by using a new transconductance (Gm) cell. The PGA has a voltage gain varying from 0 to 65 dB, while maintaining a constant bandwidth. A filter tuning circuit that requires an accurate time base but no external components is presented. With a 1-Vrms differential input and output, the filter achieves -85 dB THD and a 78 dB signal-to-noise ratio. Both the filter and PGA were implemented in a 0.18 mum 1P6M n-well CMOS process. They consume 3.2 mW from a 1.8 V power supply and occupy an area of 0.19 mm 2","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123029984","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
Choice of Root in Root-MUSIC for OFDM Carrier Frequency Offset Estimation OFDM载波频偏估计中根- music根的选择
2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554117
Qi Cheng
{"title":"Choice of Root in Root-MUSIC for OFDM Carrier Frequency Offset Estimation","authors":"Qi Cheng","doi":"10.1109/APCC.2005.1554117","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554117","url":null,"abstract":"In this paper, the performance of the root-MUSIC for the blind carrier frequency offset estimation is examined. The CFO root is normally chosen as the one closest to the unit circle. From our experimental study, it is found that the performance can be significantly improved if the CFO root is picked up as the one giving rise to a minimum value of the MUSIC polynomial","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124034098","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
Testing the Performance of Wireless LAN 无线局域网的性能测试
2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554108
G. Kbar, W. Mansoor
{"title":"Testing the Performance of Wireless LAN","authors":"G. Kbar, W. Mansoor","doi":"10.1109/APCC.2005.1554108","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554108","url":null,"abstract":"WLANs based on 802.11 standards are rapidly becoming popular in computer networks. Despite the advantages that have been obtained from this technology, its performance in terms of throughput, response time and security affected by many environmental factors such as distance, blockage, authentication mechanism and type of encryption used during the authentication and the data transmission. There are other security issues such as vulnerability to attack by the man-in-the-middle (MiM) attack which becomes a great concern for users and owners. However, the focus of this paper is for testing the WLAN performance under different conditions. The test results and recommendation can be used by designer and networks users to understand the limitation and how to improve the use of WLAN to optimize its capability. It is clear from the results obtained during the test, that WLAN response time is more affected by network load and very little effect by the size of encryption of WEP used in WLAN. The signal strength is very well affected by distance and blockage, which also affects the throughput. However, the throughput would be affected more with network load","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121373406","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
Seamnless Handover for Hotspot Network Using Adaptive Flow Control Method 基于自适应流量控制的热点网络无缝切换
2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554110
F. Yamagata, G. Kanazawa, H. Ogumaf, S. Kameda, H. Nakase, K. Tsubouchi
{"title":"Seamnless Handover for Hotspot Network Using Adaptive Flow Control Method","authors":"F. Yamagata, G. Kanazawa, H. Ogumaf, S. Kameda, H. Nakase, K. Tsubouchi","doi":"10.1109/APCC.2005.1554110","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554110","url":null,"abstract":"We have proposed hotspot network based on layer 2 forwarding for seamless handover. Key functions of the proposed hotspot network are movement notification packet sending for changing forwarding path and adaptive flow control at handover for keeping throughput. A mobile terminal sends the movement notification packet in order to change address table in nodes of the hotspot network after changing connection from previous access point to new access point. To realize adaptive flow control, MT controls transmission control protocol (TCP) offered window size. The mobile terminal closes the offered window before handover and opens the window after handover. We have evaluated performance of the proposed network using network test bench. IEEE 802.11b modems were used as wireless interfaces. The degradation of throughput at handover was reduced compared with that of conventional method without adaptive flow control","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"321 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115838698","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 of MultiWARP Routing Protocol for Multi-hop Wireless Ad-hoc Network 多跳无线自组网中MultiWARP路由协议的性能研究
2005 Asia-Pacific Conference on Communications Pub Date : 2005-12-12 DOI: 10.1109/APCC.2005.1554168
S. Van Der Werf, K. Chung
{"title":"Performance of MultiWARP Routing Protocol for Multi-hop Wireless Ad-hoc Network","authors":"S. Van Der Werf, K. Chung","doi":"10.1109/APCC.2005.1554168","DOIUrl":"https://doi.org/10.1109/APCC.2005.1554168","url":null,"abstract":"This paper presents the performance results of the multi-hop wireless ad-hoc routing protocol (multiWARP). MultiWARP is a hybrid routing protocol that minimizes the number of route request (RREQ) packets transmitted between nodes in a directed way, termed \"covercasting\", in the reactive mode. The proactive component utilizes routing table minimization to decrease the amount of data contained within route update (RUPDT) packets, as well as a novel supernode mechanism for diverse networks. A vital feature of a wireless ad-hoc routing protocol is the ability to repair broken routes that can occur due to movement of the nodes. MultiWARP uses the existing routing table at each node to repair broken routes and/or optimize routes on the fly. The performance evaluation has been carried out using the IEEE 802.11 MAC layer and observing the behaviour of the network by introducing a TCP traffic source between mobile nodes","PeriodicalId":176147,"journal":{"name":"2005 Asia-Pacific Conference on Communications","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116796185","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
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