Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375478
K. Kitayama, Kunihiko Takahashi, M. Yamamoto
ALM (Application Level Multicast) is one of the promising ways for resolving multicast incentive problem of non-multicast hosts not implementing multicast routing protocol. ALM protocol is implemented in application layer, which means it is easier to be altered by end users than lower layer protocols. Malicious users would like to get higher position in ALM tree because it can obtain higher throughput and lower delay. They also would not like other hosts to be connected because of forwarding burden will bring them wireless throughput degradation. This paper evaluates performance improvement perceived by a malicious user and shows that surprisingly it can obtain performance improvement only with almost 50% probability. We also investigate the reason why this performance effect and show that link sharing with other ALM hosts in long hops is one of the reasons of performance degradation of malicious users.
{"title":"Performance evaluation of cheating host in ALM over wireless multi-hop networks","authors":"K. Kitayama, Kunihiko Takahashi, M. Yamamoto","doi":"10.1109/APCC.2009.5375478","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375478","url":null,"abstract":"ALM (Application Level Multicast) is one of the promising ways for resolving multicast incentive problem of non-multicast hosts not implementing multicast routing protocol. ALM protocol is implemented in application layer, which means it is easier to be altered by end users than lower layer protocols. Malicious users would like to get higher position in ALM tree because it can obtain higher throughput and lower delay. They also would not like other hosts to be connected because of forwarding burden will bring them wireless throughput degradation. This paper evaluates performance improvement perceived by a malicious user and shows that surprisingly it can obtain performance improvement only with almost 50% probability. We also investigate the reason why this performance effect and show that link sharing with other ALM hosts in long hops is one of the reasons of performance degradation of malicious users.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114540132","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375675
Yang Cui, Yubin Xu, X. Sha, Rongqing Xu, Zhe Ding
In this paper, a novel multi-radio packet scheduling algorithm, QU, is proposed for real-time traffic on generic link layer (GLL). First, a scheduling-utility function is designed to represent the utility of scheduling a packet to a radio access with the goal to guarantee QoS and improve spectrum utilization. Second, using this utility function, a multi-radio packet scheduling model is presented based on joint consideration of QoS, fairness and spectrum efficiency, while the solution for this model is NP problem; Finally, Hopfield neural network (HNN) is used to fast and efficiently find an optimal solution for the scheduling model. Simulation results show that, compared with M-LWDF and PLR algorithms, QU algorithm has lower packet loss ratio and higher spectrum efficiency while could meet the allowable maximum delay requirement.
{"title":"A novel multi-radio packet scheduling algorithm for real-time traffic on generic link layer","authors":"Yang Cui, Yubin Xu, X. Sha, Rongqing Xu, Zhe Ding","doi":"10.1109/APCC.2009.5375675","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375675","url":null,"abstract":"In this paper, a novel multi-radio packet scheduling algorithm, QU, is proposed for real-time traffic on generic link layer (GLL). First, a scheduling-utility function is designed to represent the utility of scheduling a packet to a radio access with the goal to guarantee QoS and improve spectrum utilization. Second, using this utility function, a multi-radio packet scheduling model is presented based on joint consideration of QoS, fairness and spectrum efficiency, while the solution for this model is NP problem; Finally, Hopfield neural network (HNN) is used to fast and efficiently find an optimal solution for the scheduling model. Simulation results show that, compared with M-LWDF and PLR algorithms, QU algorithm has lower packet loss ratio and higher spectrum efficiency while could meet the allowable maximum delay requirement.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124477283","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375483
Yin Wang, Zhiyu Huang
Self-cancellation schemes have received a lot of attention due to their simple implementation and high efficiency to suppress intercarrier interference (ICI) in Orthogonal Frequency Division Multiplexing (OFDM) systems. Among those ICI self-cancellation methods, Symmetric Conjugate Symbol Repetition (SCSR) has been proven to have the best bit error ratio (BER) performance for phase noise suppression. In this paper, we investigate the performance of OFDM systems with SCSR ICI self-cancellation in the presence of both phase noise (PHN) and carrier frequency offset (CFO), and derive analytical expressions to calculate error probability evaluated by symbol error ratio (SER) over AWGN and Rayleigh flat fading channels. An approach of second order approximation of PHN/CFO has been performed to estimate the residual ICI, which could provide more accurate results. Simulation results show perfect agreement with those obtained by theoretical analysis, which could be used to estimate MQAM-OFDM system error probability, facilitating the design of the overall system.
{"title":"Error probability analysis of OFDM systems with ICI self-cancellation over AWGN and Rayleigh flat-fading channels","authors":"Yin Wang, Zhiyu Huang","doi":"10.1109/APCC.2009.5375483","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375483","url":null,"abstract":"Self-cancellation schemes have received a lot of attention due to their simple implementation and high efficiency to suppress intercarrier interference (ICI) in Orthogonal Frequency Division Multiplexing (OFDM) systems. Among those ICI self-cancellation methods, Symmetric Conjugate Symbol Repetition (SCSR) has been proven to have the best bit error ratio (BER) performance for phase noise suppression. In this paper, we investigate the performance of OFDM systems with SCSR ICI self-cancellation in the presence of both phase noise (PHN) and carrier frequency offset (CFO), and derive analytical expressions to calculate error probability evaluated by symbol error ratio (SER) over AWGN and Rayleigh flat fading channels. An approach of second order approximation of PHN/CFO has been performed to estimate the residual ICI, which could provide more accurate results. Simulation results show perfect agreement with those obtained by theoretical analysis, which could be used to estimate MQAM-OFDM system error probability, facilitating the design of the overall system.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124511026","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375618
T. Hori, Yosuke Yokoyama, Hirai Hiroaki, Yukimasa Nagai, Toshiaki Tomisawa, N. Shimizu, A. Shibuya
UWB is a short range (up to 10m) wireless communication technology which provides high throughput with low transmission and high reliability. We developed a PHY prototype conformed to ECMA-368, one of UWB standards, and a network simulator for evaluating MAC throughput of ECMA-368. In this paper, we propose an evaluation method considering the characteristic of PHY, the channel model and the propagation loss derived from our PHY prototype. This enables throughput evaluation in various usage models. The evaluation result shows that an application that needed 200 Mbps throughput is available at range up to 2 m. The throughput is enough to transmit a HDTV stream about 50 Mbps up to about 6 m and to transmit two HDTV streams within 3 m.
{"title":"A throughput evaluation for UWB system considering performance of a PHY prototype","authors":"T. Hori, Yosuke Yokoyama, Hirai Hiroaki, Yukimasa Nagai, Toshiaki Tomisawa, N. Shimizu, A. Shibuya","doi":"10.1109/APCC.2009.5375618","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375618","url":null,"abstract":"UWB is a short range (up to 10m) wireless communication technology which provides high throughput with low transmission and high reliability. We developed a PHY prototype conformed to ECMA-368, one of UWB standards, and a network simulator for evaluating MAC throughput of ECMA-368. In this paper, we propose an evaluation method considering the characteristic of PHY, the channel model and the propagation loss derived from our PHY prototype. This enables throughput evaluation in various usage models. The evaluation result shows that an application that needed 200 Mbps throughput is available at range up to 2 m. The throughput is enough to transmit a HDTV stream about 50 Mbps up to about 6 m and to transmit two HDTV streams within 3 m.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"220 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121623636","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375631
Han Tingting, S. Xian, Jian Nianchuan, Fung Leewo, P. Jinsong
This article discussed the principles of designation for the constellations configuration of the analogous terrestrial planets' global navigation and positioning, and analyzed an initial configuration example of the Mars Global Navigation Satellite System Constellation. Also, the method to assess the optimal constellation design was discussed. This study can give a reference about designing and establishing the Mars navigation satellites constellation system for future.
{"title":"A preliminary designation of constellation distribution for Mars GNSS","authors":"Han Tingting, S. Xian, Jian Nianchuan, Fung Leewo, P. Jinsong","doi":"10.1109/APCC.2009.5375631","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375631","url":null,"abstract":"This article discussed the principles of designation for the constellations configuration of the analogous terrestrial planets' global navigation and positioning, and analyzed an initial configuration example of the Mars Global Navigation Satellite System Constellation. Also, the method to assess the optimal constellation design was discussed. This study can give a reference about designing and establishing the Mars navigation satellites constellation system for future.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131456557","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375561
J. Jeong, Chang-Hee Lee
We propose optical noise suppression techniques for wavelength-locked Fabry-Perot laser diode (F-P LD) and demonstrate high capacity WDM-PON at 2.5 Gb/s. The noise suppressor located only at the central office enables smooth upgrade of deployed WDM-PON without modification of the outside plant. We also investigate system performance as a function of location of the noise suppressor. The impairment of noise suppressed optical signal will be also addressed.
{"title":"Optical noise suppression techniques for wavelength-locked Fabry-Perot laser diode","authors":"J. Jeong, Chang-Hee Lee","doi":"10.1109/APCC.2009.5375561","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375561","url":null,"abstract":"We propose optical noise suppression techniques for wavelength-locked Fabry-Perot laser diode (F-P LD) and demonstrate high capacity WDM-PON at 2.5 Gb/s. The noise suppressor located only at the central office enables smooth upgrade of deployed WDM-PON without modification of the outside plant. We also investigate system performance as a function of location of the noise suppressor. The impairment of noise suppressed optical signal will be also addressed.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131510219","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375622
Minseok Kim, Sungbo Ahn, Daehyoung Hong, Jaechan Lim
We consider a relay-assisted wireless communication system where relays are given the capability of scheduling function. We evaluate and compare the performances of voice over internet protocol (VoIP) in orthogonal frequency division multiple access (OFDMA) systems where two different scheduling capabilities of relays are employed in each system. In the system with relays that have the scheduling capability, channel-resource allocation is not performed efficiently, which results in degraded performance of the system compared to the system with the relays that do not have the scheduling capability as shown in the simulation result.
{"title":"Performance analysis of VoIP according to relay capability in OFDMA-based systems","authors":"Minseok Kim, Sungbo Ahn, Daehyoung Hong, Jaechan Lim","doi":"10.1109/APCC.2009.5375622","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375622","url":null,"abstract":"We consider a relay-assisted wireless communication system where relays are given the capability of scheduling function. We evaluate and compare the performances of voice over internet protocol (VoIP) in orthogonal frequency division multiple access (OFDMA) systems where two different scheduling capabilities of relays are employed in each system. In the system with relays that have the scheduling capability, channel-resource allocation is not performed efficiently, which results in degraded performance of the system compared to the system with the relays that do not have the scheduling capability as shown in the simulation result.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131786493","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375480
Lee-Chin Lau, K. Chung, K. Chan
The IEEE 802.16(d) mesh mode is proposed for the next generation wireless mesh network. It specifies two mechanisms to schedule data transmission, namely centralized scheduling and distributed scheduling. In this paper, we evaluate the performance of VoIP traffic over an IEEE 802.16(d) mesh network using the distributed scheduling. The problems of the system in supporting voice traffic are identified. To solve these problems, we propose a Cycle-based Scheduling (CBS) as an extension to the original standard to improve the QoS of VoIP traffic whilst increase the channel utilization of the network. Our preliminary simulation results show that CBS can greatly improve the QoS support of the IEEE 802.16(d) mesh mode for VoIP traffic.
{"title":"On supporting VoIP traffic in multi-hop IEEE 802.16 (d) mesh networks","authors":"Lee-Chin Lau, K. Chung, K. Chan","doi":"10.1109/APCC.2009.5375480","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375480","url":null,"abstract":"The IEEE 802.16(d) mesh mode is proposed for the next generation wireless mesh network. It specifies two mechanisms to schedule data transmission, namely centralized scheduling and distributed scheduling. In this paper, we evaluate the performance of VoIP traffic over an IEEE 802.16(d) mesh network using the distributed scheduling. The problems of the system in supporting voice traffic are identified. To solve these problems, we propose a Cycle-based Scheduling (CBS) as an extension to the original standard to improve the QoS of VoIP traffic whilst increase the channel utilization of the network. Our preliminary simulation results show that CBS can greatly improve the QoS support of the IEEE 802.16(d) mesh mode for VoIP traffic.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131789516","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375615
H. Al-Aamri, M. Abolhasan, T. Wysocki
This paper presents Heterogeneity Ratio (HR) as a new routing metric for heterogeneous MANETs. This metric is the ratio of number of powerful nodes to hop count that is used to select the best path to destination. Node heterogeneity is modeled in terms of: types and number of different interfaces, power, and transmission ranges. Our proposed routing metric is based on developing route discovery algorithm that is implemented on the top of On-demand Tree-based Routing Protocol (OTRP)[2] to accommodate nodes heterogeneity. Simulation results show that using HR with OTRP Heterogeneity Aware outperforms other metrics like minimal hop count and maximal number of powerful nodes.
{"title":"Routing metric for multi-interface and power-aware nodes in heterogeneous MANETs","authors":"H. Al-Aamri, M. Abolhasan, T. Wysocki","doi":"10.1109/APCC.2009.5375615","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375615","url":null,"abstract":"This paper presents Heterogeneity Ratio (HR) as a new routing metric for heterogeneous MANETs. This metric is the ratio of number of powerful nodes to hop count that is used to select the best path to destination. Node heterogeneity is modeled in terms of: types and number of different interfaces, power, and transmission ranges. Our proposed routing metric is based on developing route discovery algorithm that is implemented on the top of On-demand Tree-based Routing Protocol (OTRP)[2] to accommodate nodes heterogeneity. Simulation results show that using HR with OTRP Heterogeneity Aware outperforms other metrics like minimal hop count and maximal number of powerful nodes.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132637250","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375494
Z. Wang, Hui-fang Chen, Lei Xie, Kuang Wang
In this paper, we address retransmission strategies of the generation-based network coding in the packet network. Our discussion focuses on how to make the retransmission more efficient. We investigate four retransmission strategies, quasi Classical ReTransmission strategy (CRT), Random ReTransmission strategy (RRT), Racket-Loss-Edge-based ReTransmission strategy (PLERT) and Minimum ReTransmission strategy (MRT). The PLERT strategy and the MRT strategies are the main contributions of this paper.
{"title":"Retransmission strategies of the generation-based network coding in packet networks","authors":"Z. Wang, Hui-fang Chen, Lei Xie, Kuang Wang","doi":"10.1109/APCC.2009.5375494","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375494","url":null,"abstract":"In this paper, we address retransmission strategies of the generation-based network coding in the packet network. Our discussion focuses on how to make the retransmission more efficient. We investigate four retransmission strategies, quasi Classical ReTransmission strategy (CRT), Random ReTransmission strategy (RRT), Racket-Loss-Edge-based ReTransmission strategy (PLERT) and Minimum ReTransmission strategy (MRT). The PLERT strategy and the MRT strategies are the main contributions of this paper.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"29 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132995943","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}
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