2008 Australasian Telecommunication Networks and Applications Conference最新文献_第7页

Measuring Available Bandwidth: pathChirp's Chirp Train Structure Remodeled 测量可用带宽:pathChirp的Chirp序列结构重构

2008 Australasian Telecommunication Networks and Applications Conference Pub Date : 2008-12-01 DOI: 10.1109/ATNAC.2008.4783354

S. Suthaharan, S. Kumar

{"title":"Measuring Available Bandwidth: pathChirp's Chirp Train Structure Remodeled","authors":"S. Suthaharan, S. Kumar","doi":"10.1109/ATNAC.2008.4783354","DOIUrl":"https://doi.org/10.1109/ATNAC.2008.4783354","url":null,"abstract":"Measuring available bandwidth over a network path is required by many applications including end-to-end admission control and server selection. In order to measure the available bandwidth, the end hosts need network information, such as packet delay, at intermediate systems. Several techniques have been proposed to address this problem. We have selected the most recently proposed algorithm called pathChirp and proposed an alternative approach. The main goal of pathChirp is to get the delay information at the intermediate systems by using the concept of self-induced congestion (which uses chirp train packets) in order to estimate the available bandwidth. However there are scenarios where pathChirp cannot provide accurate available bandwidth. We use the pathChirp mechanism as our underlying tool and modify its structure of chirp train. In the modified structure, the rate of the odd inter-chirp packet will be the same as the rate of previous even inter-chirp packet. Additionally, rate of inter-chirp packets will be increased exponentially with even power rather than both even and odd power as done in pathChirp scheme. Purpose of this new structure is to capture more network information using three different time-shifted chirp trains, and subsequently to find a better estimate for the available bandwidth. Our theory and simulation results support this claim.","PeriodicalId":143803,"journal":{"name":"2008 Australasian Telecommunication Networks and Applications Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124329894","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: 8

Radiation Losses from a Single Wire Earth Return Power Line with Bends 带弯曲的单线回地电力线的辐射损耗

2008 Australasian Telecommunication Networks and Applications Conference Pub Date : 2008-12-01 DOI: 10.1109/ATNAC.2008.4783315

C. Kikkert, G. Reid

引用次数: 7

Servicing Best Effort Traffic Using nrtPS on Fixed WiMAX 在固定WiMAX上使用nrtPS服务最佳努力流量

2008 Australasian Telecommunication Networks and Applications Conference Pub Date : 2008-12-01 DOI: 10.1109/ATNAC.2008.4783345

S. Perera, Harsha Sirisena

引用次数: 1

Design & Implementation of a Secure Sensitive Information System for Wireless Mobile Devices 无线移动设备安全敏感信息系统的设计与实现

2008 Australasian Telecommunication Networks and Applications Conference Pub Date : 2008-12-01 DOI: 10.1109/ATNAC.2008.4783293

Xianping Wu, Huy Hoang Ngo, P. D. Le, B. Srinivasan

引用次数: 1

Minimization of Error in Pitch Detection algorithm using Discrete Fractional Cosine Transform 基于离散分数余弦变换的基音检测算法误差最小化

2008 Australasian Telecommunication Networks and Applications Conference Pub Date : 2008-12-01 DOI: 10.1109/ATNAC.2008.4783358

M. Hasan, M. L. Kabir

引用次数: 1

Capacity and power control in spread spectrum macro-diversity radio networks revisited 扩频宏分集无线网络的容量和功率控制

2008 Australasian Telecommunication Networks and Applications Conference Pub Date : 2008-12-01 DOI: 10.1109/ATNAC.2008.4783335

V. Rodriguez, R. Mathar, A. Schmeink

引用次数: 6

On Multi-Channel MAC Protocols in Cognitive Radio Networks 认知无线网络中的多通道MAC协议研究

2008 Australasian Telecommunication Networks and Applications Conference Pub Date : 2008-12-01 DOI: 10.1109/ATNAC.2008.4783340

A.K.-L. Yau, P. Komisarczuk, Paul D. Teal

{"title":"On Multi-Channel MAC Protocols in Cognitive Radio Networks","authors":"A.K.-L. Yau, P. Komisarczuk, Paul D. Teal","doi":"10.1109/ATNAC.2008.4783340","DOIUrl":"https://doi.org/10.1109/ATNAC.2008.4783340","url":null,"abstract":"Cognitive Radio (CR) exploits underutilized licensed spectrums to improve its bandwidth availability. Using CR technology, a node is able to adapt its transmission and reception radio parameters including channel frequency dynamically according to local spectrum availability. For channel access between wireless nodes, a cognitive Medium Access Control (MAC) protocol is necessary to coordinate the CRs. Multi-channel MAC protocol extensions have been proposed in IEEE802.11 to enable a node to operate in multiple channels in order to improve network-wide throughput. These multi-channel MAC protocols have several functions that can be leveraged by cognitive MAC protocols due to their similarities in certain aspects, though the CR has an additional requirement to cope with the existence of licensed users that have higher authority over the channels. Current research in cognitive MAC protocols assumes the availability of a common control channel at all times, which is an approach in the multi-channel MAC protocols. This approach has certain hardware requirements that may not be readily available at CR nodes. Hence, other approached may be necessary. In this paper, various types of multi-channel MAC protocols are reviewed, followed by discussion of their merits and demerits in multi-channel environments. The purpose is to show the additional functionalities and challenges that each multi-channel MAC protocol has to offer and address in order to operate in multihop CR networks. By providing discussion on possible technology leverage from multi-channel to cognitive MAC protocols, we aim to establish a foundation for further research and discussion.","PeriodicalId":143803,"journal":{"name":"2008 Australasian Telecommunication Networks and Applications Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131515295","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: 18

Joint Time-domain/Frequency-domain Impulsive Noise Reduction in OFDM-based Power Line Communications 基于ofdm的电力线通信时域/频域脉冲噪声联合降噪

2008 Australasian Telecommunication Networks and Applications Conference Pub Date : 2008-12-01 DOI: 10.1109/ATNAC.2008.4783311

K. Al-Mawali, A. Sadik, Z. M. Hussain

引用次数: 40

Self-restraint Admission Control for adhoc WLANs 自适应无线局域网的自我约束准入控制

2008 Australasian Telecommunication Networks and Applications Conference Pub Date : 2008-12-01 DOI: 10.1109/ATNAC.2008.4783320

Hushairi Zen, D. Habibi, I. Ahmad

引用次数: 5

Source Localisation in Wireless Sensor Networks Based on Optimised Maximum Likelihood 基于优化最大似然的无线传感器网络源定位

2008 Australasian Telecommunication Networks and Applications Conference Pub Date : 2008-09-01 DOI: 10.1109/ATNAC.2008.4783329

Mohammed Rahman, Edith Cowan, D. Habibi, I. Ahmad, M. Z. Rahman

引用次数: 5