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9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732)最新文献

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The performance analysis and simulation of header compression in VoIP services over cellular links 蜂窝链路上VoIP业务报头压缩的性能分析与仿真
9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732) Pub Date : 2003-09-21 DOI: 10.1109/APCC.2003.1274437
Yichuan Wu, Jianping Zheng, Kui Huang
{"title":"The performance analysis and simulation of header compression in VoIP services over cellular links","authors":"Yichuan Wu, Jianping Zheng, Kui Huang","doi":"10.1109/APCC.2003.1274437","DOIUrl":"https://doi.org/10.1109/APCC.2003.1274437","url":null,"abstract":"In future all IP cellular system, the requirement in terms of voice quality and spectrum efficiency for voice over IP services will reasonably be similar to current requirement on the circuit switched voice services. Hence, comparing with payload, the relatively large IP/UDP/RTP headers of wireless VoIP must be reduced in size by header compression. This paper detailedly analyzes two main header compression algorithms used in current wireless VoIP services. By simulation, the performance of these algorithms in cellular links is evaluated and compared.","PeriodicalId":277507,"journal":{"name":"9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117084530","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
IPv4/IPv6 SIP interworking methods in dual-stack network 双栈组网下的IPv4/IPv6 SIP互通方式
9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732) Pub Date : 2003-09-21 DOI: 10.1109/APCC.2003.1274275
Y. Kawarasaki, T. Shibata, T. Takahashi
{"title":"IPv4/IPv6 SIP interworking methods in dual-stack network","authors":"Y. Kawarasaki, T. Shibata, T. Takahashi","doi":"10.1109/APCC.2003.1274275","DOIUrl":"https://doi.org/10.1109/APCC.2003.1274275","url":null,"abstract":"Session initiation protocol (SIP) is important for end-to-end communication services. Furthermore, a dual-stack network is important for the transition from IPv4 to IPv6. There are few proposals for IPv4/IPv6 SIP interworking methods in dual-stack networks. In a dual-stack network, the IP versions of the originating and terminating terminals are determined at the time of session initiation, so a protocol translation determination function is needed to minimize the amount of protocol translation. In this paper we propose two IPv4/IPv6 SIP interworking methods that eliminate unnecessary IPv4/IPv6 translations. We evaluated the existing methods and the proposed methods.","PeriodicalId":277507,"journal":{"name":"9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114898026","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: 9
Finite-difference time-domain computation of pulse propagation in relatively long nonlinear optical fiber 脉冲在较长非线性光纤中传播的时域有限差分计算
9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732) Pub Date : 2003-09-21 DOI: 10.1109/APCC.2003.1274364
P. Kaewplung, T. Angkaew
{"title":"Finite-difference time-domain computation of pulse propagation in relatively long nonlinear optical fiber","authors":"P. Kaewplung, T. Angkaew","doi":"10.1109/APCC.2003.1274364","DOIUrl":"https://doi.org/10.1109/APCC.2003.1274364","url":null,"abstract":"We propose the use of FDTD method for, simulating pulse propagation in relatively long fiber and also a condition to determine the calculation step size. The results are compared with those from the split-step Fourier method.","PeriodicalId":277507,"journal":{"name":"9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125425340","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
User based network (WAN) traffic analysis 基于用户的网络(WAN)流量分析
9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732) Pub Date : 2003-09-21 DOI: 10.1109/APCC.2003.1274281
C. Dethe, D. Wakde
{"title":"User based network (WAN) traffic analysis","authors":"C. Dethe, D. Wakde","doi":"10.1109/APCC.2003.1274281","DOIUrl":"https://doi.org/10.1109/APCC.2003.1274281","url":null,"abstract":"Today's complex network traffic is the aggregation of traffic generated by individual sources on network. Therefore access pattern of users is of immense importance in order to model and simulate the network traffic using user characteristics. In this study we identify the parameter matrix to characterise the individual user and compute their correlation analysis in order to find their independence, useful criterion for modeling.","PeriodicalId":277507,"journal":{"name":"9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732)","volume":"44 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123276118","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
The design and application of mobile awareness mechanism in wireless ad hoc networks without GPS 无GPS无线自组网中移动感知机制的设计与应用
9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732) Pub Date : 2003-09-21 DOI: 10.1109/APCC.2003.1274330
Chun-Hung Chen, Ho-Ting Wu, Kai-Wei Ke
{"title":"The design and application of mobile awareness mechanism in wireless ad hoc networks without GPS","authors":"Chun-Hung Chen, Ho-Ting Wu, Kai-Wei Ke","doi":"10.1109/APCC.2003.1274330","DOIUrl":"https://doi.org/10.1109/APCC.2003.1274330","url":null,"abstract":"A mobile ad hoc network is a wireless multihop network without any existing infrastructure. Thus when one node wants to transmit data to another node, it should depend on other nodes to forward it. In such a networking environment, the movement of highly mobile nodes may frequently result in the link breakdown, thus causing network inefficiency and data loss. In this paper, we develop a simple heuristic mechanism to characterize the instant mobility of network nodes. We assume that all network nodes can move arbitrarily, and none of them is equipped with any positioning device (such as the GPS system). Each mobile node is (at any time) classified as either a low mobility node or a high mobility node. A mobile node estimates its own mobility type by comparing the signal strength of consecutive received messages sent by its low mobility neighboring nodes. It then broadcasts this mobility type information to its neighbors. The mobility estimation algorithm is thus fully distributed and self organized. We then apply the estimated mobility characteristics to the construction of the end-to-end routing path. Two methods of selecting low mobility nodes as the primary intermediate routing nodes are presented. Performance evaluations via simulations have demonstrated the robustness of such a mobile awareness algorithm.","PeriodicalId":277507,"journal":{"name":"9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123460745","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
Radiation characteristics of inclined slot antenna on conducting spherical cavity 斜槽天线在导电球腔上的辐射特性
9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732) Pub Date : 2003-09-21 DOI: 10.1109/APCC.2003.1274241
C. Phongcharoenpanich, D. Boonrod, M. Krairiksh
{"title":"Radiation characteristics of inclined slot antenna on conducting spherical cavity","authors":"C. Phongcharoenpanich, D. Boonrod, M. Krairiksh","doi":"10.1109/APCC.2003.1274241","DOIUrl":"https://doi.org/10.1109/APCC.2003.1274241","url":null,"abstract":"This paper presents theoretical investigations of the characteristics such as radiation pattern, half-power beamwidth, directivity, front-to-back ratio and polarization of an inclined slot on spherical surface. The total fields inside the cavity are formulated by means of the combination of TE and TM modes. The unknown coefficients of the fields are determined by imposing the boundary conditions. The voltage distribution along the slot is reasonably assumed to be the sinusoidal functions. The numerical results of radiation characteristics for various radii of the spherical surface are illustrated. The comparisons between horizontal slot and inclined slot are reported. The result of the analysis shows that this technique is very useful for the design of spherical slot array antenna of any orientation.","PeriodicalId":277507,"journal":{"name":"9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123910092","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
New call blocking probability (NCBP) in improved adaptive quality of service (AdQoS) for wireless multimedia communications using hierarchical cellular approach 基于分层蜂窝方法的改进自适应服务质量(AdQoS)无线多媒体通信中的新呼叫阻塞概率(NCBP)
9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732) Pub Date : 2003-09-21 DOI: 10.1109/APCC.2003.1274442
S. Kandasamy, Prihandoko, B. Ali, V. Prakash, R. Kalos
{"title":"New call blocking probability (NCBP) in improved adaptive quality of service (AdQoS) for wireless multimedia communications using hierarchical cellular approach","authors":"S. Kandasamy, Prihandoko, B. Ali, V. Prakash, R. Kalos","doi":"10.1109/APCC.2003.1274442","DOIUrl":"https://doi.org/10.1109/APCC.2003.1274442","url":null,"abstract":"The maintenance of quality of service (QoS) in a wireless environment is a difficult problem. Most researchers have already acknowledged adaptive techniques as the appropriate method to deal with the fluctuation of QoS in a wireless cellular network. This paper proposes an improved new call blocking probability (NCBP) from an adaptive QoS (AdQoS) to support the QoS guarantee. Besides using an adaptive technique, this method utilizes a hierarchical cellular approach with a bandwidth reallocation algorithm to determine the acceptance or rejection of a new call. The approach would improve the NCBP performance of the multimedia application over high-speed wireless cellular networks.","PeriodicalId":277507,"journal":{"name":"9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128243873","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: 6
Design of an optical fiber link employing QPSK format with SCM scheme 采用单片机方案设计QPSK格式的光纤链路
9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732) Pub Date : 2003-09-21 DOI: 10.1109/APCC.2003.1274338
Z. Zan, S. Hitam, W. Adnan, M. Yaacob, M. Abdullah
{"title":"Design of an optical fiber link employing QPSK format with SCM scheme","authors":"Z. Zan, S. Hitam, W. Adnan, M. Yaacob, M. Abdullah","doi":"10.1109/APCC.2003.1274338","DOIUrl":"https://doi.org/10.1109/APCC.2003.1274338","url":null,"abstract":"The multiplexing technique used in this paper offers many advantages over the traditional multiplexing techniques such as the ability to carry larger capacity in the same bandwidth, the cost-effectiveness of the components and higher service modularity. The quadrature phase shift keying (QPSK) format with sub-carrier multiplexing (SCM) scheme will allow a larger capacity to be transmitted as each waveform represents two bits. In this paper the performance of the two channel- QPSK format with SCM scheme is presented and discussed.","PeriodicalId":277507,"journal":{"name":"9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129229247","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
Incoercible secure electronic voting scheme based on chaffing and winnowing 基于干扰和筛选的不可强制安全电子投票方案
9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732) Pub Date : 2003-09-21 DOI: 10.1109/APCC.2003.1274478
N. C. Kiong, A. Samsudin
{"title":"Incoercible secure electronic voting scheme based on chaffing and winnowing","authors":"N. C. Kiong, A. Samsudin","doi":"10.1109/APCC.2003.1274478","DOIUrl":"https://doi.org/10.1109/APCC.2003.1274478","url":null,"abstract":"This paper investigates the feasibility of Rivest's chaffing and winnowing (C&W) paradigm in providing incoercibility into electronic voting (e-voting) scheme. We begin with analysis the previous attempts to introduce incoercibility into e-voting scheme and then present the basic idea behind the C&W. We show that by using C&W, we could achieve incoercibility without sacrificing other security requirements or relying on some forms of physical assumption. Our scheme is secure against both passive and active coercers if the adversaries could not prescribe the random value of the number theory in used.","PeriodicalId":277507,"journal":{"name":"9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130909741","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
Penang engineering smart-support 槟城工程智能支持
9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732) Pub Date : 2003-09-21 DOI: 10.1109/APCC.2003.1274340
S. Jamaludin, Lee Chang Wei, J. Chan, Ong Con Nie, A. Shahril
{"title":"Penang engineering smart-support","authors":"S. Jamaludin, Lee Chang Wei, J. Chan, Ong Con Nie, A. Shahril","doi":"10.1109/APCC.2003.1274340","DOIUrl":"https://doi.org/10.1109/APCC.2003.1274340","url":null,"abstract":"Achieving greater efficiencies in productivity and smart approach of information technology (IT) to fulfill the business needs in a company is always important issues, especially in a challenging research and development (R&D) environment. Today, the need of electronically accessing information and sharing information in a group of people is a must in organization. These needs are important for the peoples to work more efficiency and productivity. This paper is to illustrate the smart approaches taken by CTDG Penang engineering computing supporting total Penang R&D users. These approaches mainly will concentrate more on Windows environment with the implementation of features available using Microsoft Windows 2000 Server operating system. In these paper we will discuss further more on the challenges that GTDG Penang R&D Center facing in Windows base environment, the smart approach by implementation of Microsoft Windows 2000 server, the impact of the implementation to R&D users and the benefits of implementing Microsoft Windows 2000 server achieved through better security, manageability, users support and uptime.","PeriodicalId":277507,"journal":{"name":"9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732)","volume":"25 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126370482","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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