2010 16th Asia-Pacific Conference on Communications (APCC)最新文献_第7页

Novel autocorrelation based spectrum sensing methods for cognitive radios 基于自相关的认知无线电频谱感知新方法

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679691

Wang Jun, Bi Guangguo

引用次数: 5

Primary system interference analysis for cognitive radio transmission power control 认知无线电发射功率控制初级系统干扰分析

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679695

Meng-Jung Ho, S. Berber, K. Sowerby

{"title":"Primary system interference analysis for cognitive radio transmission power control","authors":"Meng-Jung Ho, S. Berber, K. Sowerby","doi":"10.1109/APCC.2010.5679695","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679695","url":null,"abstract":"Cognitive radio (CR) improves radio spectrum utilization and offers new opportunities for future wireless services. It is designed to operate in frequency bands that are licensed to other primary radio users while ensuring no harmful interference to the licensed users' operations. By knowing the geo-locations of the CRs and the licensed users, it is possible to allow CR to access licensed bands without causing interference. In this paper, a transmission power control scheme for CRs is proposed to minimise the interference to licensed users. The scheme utilises mainly location information to estimate primary systems service reliability as the main power control indicator to determine the transmission power. Primary system interference analysis has been conducted as a part of the scheme and a model of an exclusion zone centred on a primary transmitter (PT) has been developed. This model is also specified by the Federal Communications Commission (FCC). Interference analysis at the centre and the edge of the exclusion zone has been performed by other researchers. In this paper, an analysis of the interference power level across the entire coverage area has been conducted. The effect of shadowing has also been included in the evaluation. The interference power statistics have been analysed for the entire coverage area. Analytic studies and Monte Carlo simulations are in agreement.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"60 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":"133377058","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

Fair data flows scheduling schema for multihop wireless ad hoc networks 多跳无线自组织网络的公平数据流调度方案

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5680004

Hamidreza Salarian, P. Khadivi

{"title":"Fair data flows scheduling schema for multihop wireless ad hoc networks","authors":"Hamidreza Salarian, P. Khadivi","doi":"10.1109/APCC.2010.5680004","DOIUrl":"https://doi.org/10.1109/APCC.2010.5680004","url":null,"abstract":"One of the most critical problems in multihop wireless networks is the fair allocation of bandwidth among different nodes. Although there are significant researches on the fairness issues in single-hop wireless networks, research on multihop fairness rarely found in the literature. A user in multi-hop network, besides the contention with other nodes to obtain the channel in physical layer, must find a solution for the inevitable contention between its own and the relayed traffic in the network layer. Accordingly, a suitable mechanism is needed to schedule data flows in network layer fairly. In this paper, a new algorithm is proposed which tries to allocate node's bandwidth fairly between different contention traffic flows. The main purpose of this algorithm, named HBPQ (History Based Priority Queuing) is the prevention of starvation occurrence for any active flow in the network. HBPQ uses a satisfaction function to measure the user's gratifications and tries to bring close the satisfaction of users. If HBPQ is used for flow scheduling in multihop wireless ad-hoc networks, the simulation results show that each active network's flow, receives a throughput proportional to distance between its source and destination and existing traffic load on its traversed path.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"1995 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":"130405887","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

Analytical modeling of multi-service systems with multi-service sources 具有多服务源的多服务系统分析建模

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679781

M. Głąbowski, M. Sobieraj, M. Stasiak

引用次数: 11

Multi-user and channel dependent scheduling based adaptive power saving for LTE and beyond system 基于多用户和信道相关调度的LTE及以上系统自适应节能

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679748

Liu Liu, X. She, Lan Chen

引用次数: 15

Reliable data delivery in low energy ad hoc sensor networks 低能量自组织传感器网络中的可靠数据传输

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679762

K. Daabaj, M. Dixon, Terry Koziniec, David Murray

{"title":"Reliable data delivery in low energy ad hoc sensor networks","authors":"K. Daabaj, M. Dixon, Terry Koziniec, David Murray","doi":"10.1109/APCC.2010.5679762","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679762","url":null,"abstract":"Reliable delivery of data is a classical design goal for reliability-oriented collection routing protocols for ad hoc wireless sensor networks (WSNs). Guaranteed packet delivery performance can be ensured by careful selection of error free links, quick recovery from packet losses, and avoidance of overloaded relay sensor nodes. Due to limited resources of individual senor nodes, there is usually a trade-off between energy spending for packets transmissions and the appropriate level of reliability. Since link failures and packet losses are unavoidable, sensor networks may tolerate a certain level of reliability without significantly affecting packets delivery performance and data aggregation accuracy in favor of efficient energy consumption. However a certain degree of reliability is needed, especially when hop count increases between source sensor nodes and the base station as a single lost packet may result in loss of a large amount of aggregated data along longer hops. An effective solution is to jointly make a trade-off between energy, reliability, cost, and agility while improving packet delivery, maintaining low packet error ratio, minimizing unnecessary packets transmissions, and adaptively reducing control traffic in favor of high success reception ratios of representative data packets. Based on this approach, the proposed routing protocol can achieve moderate energy consumption and high packet delivery ratio even with high link failure rates. The proposed routing protocol was experimentally investigated on a testbed of Crossbow's TelosB motes and proven to be more robust and energy efficient than the current implementation of TinyOS2.x MultihopLQI.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"9 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":"124197059","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

Protocol proxy scheme for emulating OSPF for IP+optical network management 模拟OSPF的IP+光网络管理协议代理方案

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5680016

S. Tsunoda, N. Kitsuwan, E. Oki, T. Miyamura, K. Shiomoto

{"title":"Protocol proxy scheme for emulating OSPF for IP+optical network management","authors":"S. Tsunoda, N. Kitsuwan, E. Oki, T. Miyamura, K. Shiomoto","doi":"10.1109/APCC.2010.5680016","DOIUrl":"https://doi.org/10.1109/APCC.2010.5680016","url":null,"abstract":"This paper proposes a protocol proxy scheme that can emulate the open shortest path first (OSPF) protocol in an effective and flexible manner. It is implemented in our developed network emulator, which is used to test network controllers for IP optical network management. In the protocol scheme, OSPF protocol emulation is achieved by combining an OSPF protocol proxy (introduced here) and an OSPF peer state manager based on existing OSPF protocol software. The protocol proxy produces OSPF packets holding link state advertisements with customized extensions including MPLS and GMPLS, while the OSPF peer state manager implements neighbor establishment via the proxy. The protocol proxy has two main functions: rewrite OSPF packets originated by the OSPF peer state manager and generate OSPF packets to inform the updated topology to the network controller. To implement the customized OSPF extensions, only the protocol proxy software need be modified; the existing OSPF software for the OPSF peer state manager is not touched. This makes the implementation of the OSPF emulation easy and flexible. Furthermore, the protocol proxy obtains the network topology information from the resource simulator, which is managed in a centralized manner. This reduces the amount of processing resources required and is scalable in terms of network size. We develop a prototype of the network emulator including OSPF protocol emulation with the protocol proxy scheme. The effectiveness of the protocol proxy scheme is confirmed by an experiment on 40 nodes.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"110 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":"122624737","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

Analytical performance evaluation of IEEE 802.15.4 with multiple transmission queues for providing QoS under non-saturated conditions IEEE 802.15.4多传输队列在非饱和条件下提供QoS的分析性能评价

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679712

Youn-Soon Shin, Kang-Woo Lee, Jong-Suk Ahn

{"title":"Analytical performance evaluation of IEEE 802.15.4 with multiple transmission queues for providing QoS under non-saturated conditions","authors":"Youn-Soon Shin, Kang-Woo Lee, Jong-Suk Ahn","doi":"10.1109/APCC.2010.5679712","DOIUrl":"https://doi.org/10.1109/APCC.2010.5679712","url":null,"abstract":"This paper investigates the effects of adopting multiple transmission queues in IEEE 802.15.4 to differentiate frame sending priorities for providing QoS (Quality of Service) services. By employing different contention window operational parameters for various traffic classes like IEEE 802.11e, the multi-queue system can send frames of higher priority class more rapidly than those of the lower ones. For the performance evaluation of multi-queue's behavior under both saturated and unsaturated traffic conditions, this paper proposes an analytical model which integrates models for conventional 802.15.4 and legacy 802.11e. To enhance the accuracy, furthermore, the model accommodates the deferment behaviors and transmission retries that have not been accounted in traditional 802.15.4 models. Our analytical model predicts that the multi-queue scheme separates the throughput of two different classes by up to 46% without wasting the bandwidth when the two classes contend over the wireless channel. Simulation results validate our model's accuracy within 7% discrepancy at maximum.","PeriodicalId":402292,"journal":{"name":"2010 16th Asia-Pacific Conference on Communications (APCC)","volume":"23 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":"114593110","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

Mobility-based handover decision mechanism to relieve ping-pong effect in cellular networks 基于移动性的切换决策机制缓解蜂窝网络中的乒乓效应

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5680000

Jaheon Gu, S. Bae, M. Chung, K. Cheon, A. Park

引用次数: 13

Performance analysis of overlap FFT filter-bank for dynamic spectrum access applications 动态频谱接入中重叠FFT滤波器组的性能分析

2010 16th Asia-Pacific Conference on Communications (APCC) Pub Date : 2010-10-01 DOI: 10.1109/APCC.2010.5679690

M. Umehira, M. Tanabe

引用次数: 11