基于DVB-S2/RCS协议的卫星系统性能研究
|
摘要
快速发展的地面通信网络极大地方便了人们的生活,可是在一些偏远地区,仍然存在通信资源不足的状况。宽带多媒体卫星通信系统具有覆盖范围大、受地理条件限制小等优势,能满足人们的通信需求,因而,建立宽带多媒体卫星通信系统具有重要意义。
卫星通信系统包括信号传输与处理技术、资源分配、流量控制等关键技术,本文搭建了基于DVB-S2/RCS协议的宽带多媒体卫星通信仿真系统,并对其性能进行研究。该系统前向链路基于DVB-S2协议,反向链路基于DVB-RCS协议,地面站通过光纤互连,对该系统性能的研究内容及结果主要分为三部分：
(1)研究并仿真分析了前向链路采用不同调制编码方式时,信道的信息效率、频谱效率和误码率。结果表明,相同调制方式下,信息效率、频谱效率随着编码效率的增加而增加,信道符号速率、误码率随着编码效率的增加而减小。
(2)反向链路基于MF-TDMA的频率、时隙资源位置分配算法。反向链路资源分配包括用户竞争入网方式及资源申请算法、无线资源管理器(RRM)资源数量分配算法及位置安排算法。该部分重点对RRM资源位置安排算法进行研究。改进RCP fit算法,提出可变带宽信道预留资源位置分配算法,并仿真比较了不同算法时的资源碎片及包延迟。结果表明,与RCP fit算法相比,可变带宽RCP fit算法在不增加系统时隙碎片的基础上,降低了宽带实时业务(如视频)的链路时延,提高了服务质量,该算法具有适用性。另外,对于实时业务,包抖动会影响业务服务质量,本文通过仿真对比了采用JRA算法前后语音包的抖动,验证了JRA算法是降低实时业务包抖动的有效算法。
(3)地面站光纤网流量控制对业务时延的影响。提出了基于链路利用状况的流量控制方法,并进行仿真分析。结果表明,基于星型拓扑结构的地面站光纤网具有便于中心节点管理其它节点的优点；基于链路利用状况的流量控制方法可在不改变发射端速率的情况下降低网络拥塞,提高服务质量,增强网络整体性能。
With the rapid development of terrestrial communication network, life become more and more convenient. However, there is no enough communication resources in some areas. Brandband multimedia satellite communication system has advantagy of large coverage area, small limitation from geographical conditions, which can meet people communication needs, thus, it is important to establish satellite communication system.
Key technologies of satellite communication system contain signal transmission and processing, resource allocation, flow control. In the paper, a broadband multimedia satellite communication system based on DVB-S2/RCS is researched. In the system, forward link bases on DVB-S2, return link bases on DVB- RCS, and ground stations are connected by optical fiber. Research and results of system performance contain three parts:
(1) Information efficiency, spectrum efficiency and bit error rate(BER) in channel were simulated and analyzed when different Coding and Modulation is employed in forward link. The results show that information efficiency and spectrum efficiency increase with code rate increasing, while symbol rate and BER decrease with code rate decreasing.
(2)Frequency and time slots resources position allocation algorithms are researched in return link based on DVB-RCS. Return link resources allocation includes RCSTs access, resource request, resources number allocation and resources position allocation. The part has an emphasis on resources position allocation. Adaptive bandwidth RCP fit algorithm is proposed by improving RCP fit. Resource fragments and packet delay are compared between adaptive bandwidth RCP fit and RCP fit. The results show that, to real time traffic like video, adaptive bandwidth RCP fit decreases packet delay and improve QoS while it does not increase resource fragments compared to RCP fit, which proves adaptive bandwidth RCP fit is correct. In addition, jitter affects QoS to real time traffic, so voice packets jitter are compared between JRA or no JRA, which improves JRA is an effective algorithm decreasing packets jitter.
(3)Flow control of ground station optical fiber network has an effect on service delay. A kind of flow control method based on link usage is proposed and simulated. The research results show that ground-station fiber network using star topology structure has better performance on management of the center node over other nodes. The network congestion of satellite communication scheme using the link usage-based flow control method is reduced without changing source rate, moreover, quality of service and the whole network performance are improved.
卫星通信系统包括信号传输与处理技术、资源分配、流量控制等关键技术,本文搭建了基于DVB-S2/RCS协议的宽带多媒体卫星通信仿真系统,并对其性能进行研究。该系统前向链路基于DVB-S2协议,反向链路基于DVB-RCS协议,地面站通过光纤互连,对该系统性能的研究内容及结果主要分为三部分：
(1)研究并仿真分析了前向链路采用不同调制编码方式时,信道的信息效率、频谱效率和误码率。结果表明,相同调制方式下,信息效率、频谱效率随着编码效率的增加而增加,信道符号速率、误码率随着编码效率的增加而减小。
(2)反向链路基于MF-TDMA的频率、时隙资源位置分配算法。反向链路资源分配包括用户竞争入网方式及资源申请算法、无线资源管理器(RRM)资源数量分配算法及位置安排算法。该部分重点对RRM资源位置安排算法进行研究。改进RCP fit算法,提出可变带宽信道预留资源位置分配算法,并仿真比较了不同算法时的资源碎片及包延迟。结果表明,与RCP fit算法相比,可变带宽RCP fit算法在不增加系统时隙碎片的基础上,降低了宽带实时业务(如视频)的链路时延,提高了服务质量,该算法具有适用性。另外,对于实时业务,包抖动会影响业务服务质量,本文通过仿真对比了采用JRA算法前后语音包的抖动,验证了JRA算法是降低实时业务包抖动的有效算法。
(3)地面站光纤网流量控制对业务时延的影响。提出了基于链路利用状况的流量控制方法,并进行仿真分析。结果表明,基于星型拓扑结构的地面站光纤网具有便于中心节点管理其它节点的优点；基于链路利用状况的流量控制方法可在不改变发射端速率的情况下降低网络拥塞,提高服务质量,增强网络整体性能。
With the rapid development of terrestrial communication network, life become more and more convenient. However, there is no enough communication resources in some areas. Brandband multimedia satellite communication system has advantagy of large coverage area, small limitation from geographical conditions, which can meet people communication needs, thus, it is important to establish satellite communication system.
Key technologies of satellite communication system contain signal transmission and processing, resource allocation, flow control. In the paper, a broadband multimedia satellite communication system based on DVB-S2/RCS is researched. In the system, forward link bases on DVB-S2, return link bases on DVB- RCS, and ground stations are connected by optical fiber. Research and results of system performance contain three parts:
(1) Information efficiency, spectrum efficiency and bit error rate(BER) in channel were simulated and analyzed when different Coding and Modulation is employed in forward link. The results show that information efficiency and spectrum efficiency increase with code rate increasing, while symbol rate and BER decrease with code rate decreasing.
(2)Frequency and time slots resources position allocation algorithms are researched in return link based on DVB-RCS. Return link resources allocation includes RCSTs access, resource request, resources number allocation and resources position allocation. The part has an emphasis on resources position allocation. Adaptive bandwidth RCP fit algorithm is proposed by improving RCP fit. Resource fragments and packet delay are compared between adaptive bandwidth RCP fit and RCP fit. The results show that, to real time traffic like video, adaptive bandwidth RCP fit decreases packet delay and improve QoS while it does not increase resource fragments compared to RCP fit, which proves adaptive bandwidth RCP fit is correct. In addition, jitter affects QoS to real time traffic, so voice packets jitter are compared between JRA or no JRA, which improves JRA is an effective algorithm decreasing packets jitter.
(3)Flow control of ground station optical fiber network has an effect on service delay. A kind of flow control method based on link usage is proposed and simulated. The research results show that ground-station fiber network using star topology structure has better performance on management of the center node over other nodes. The network congestion of satellite communication scheme using the link usage-based flow control method is reduced without changing source rate, moreover, quality of service and the whole network performance are improved.
引文
[1]Timothy Pratt, Charles Bostian, Jeremy Allnutt卫星通信(第2版)[M].甘良才.北京：电子工业出版社,2005：3-5.
[2]闵士权.我国下一代通信卫星研究现状和发展策略思考[A].第六届卫星通信新业务新技术学术年会[C].北京,2010.24-34.
[3]闰忠文.新一代宽带多媒体卫星通信系统[A].第三届全国因特网与音频广播发展研讨会[C].北京,2003.25-29.
[4]闰忠文.空中交换机：中国的宽带卫星系统构想[A].中国卫星通信广播电视技术第七届国际研讨会[C].北京,2006：1-6.
[5]Apostolos Destounis, Athanasios Panagopoulos. Dynamic Power Allocation for Broadband Multi-Beam Satellite Communication Networks. Communications Letters,2011,15(4):380-382.
[6]Qinghua Zheng, Yongling Song, Jun Liu. A Resource Reservation and Scheduling Algorithm for Learning On-Demand System over Satellite and Cable Network[J]. Proceedings of the IEEE Fourth International Symposium on Multimedia Software Engineering,2002:166-173.
[7]Mohammad Mahfujur Rashid, Md. Rafiqul Islam, AHM Zahirul Alam. Rain Fade and It's Effect Analysis for Earth-to-Satellite Microwave Link Based on Measured Rainfall Statistics in Bangladesh[J]. IEEE 9th Malaysia Internatioanal Conference,2009:244-249.
[8]Erdenekhuu Norinpel. Microwave Attenuation due to Dust and Sand Storm in earth-Satellite Link[J]. IFOST 2007:599-601.
[9]Bruce Bennett, Christohper Holt. DVB-S2 BENEFITS FOR MILITARY BROADCAST SYSTEMS[J]. Military Communications Conference,2005: 148-154.
[10]Jong Gyu Oh, Joon Tae Kim. An Alternative Carrier Frequency Synchronization Scheme for DVB-S2 Systems[J]. Military Communications Conference, 2010:529-533.
[11]安宁.基于TDMA的GEO卫星系统接入控制方式的研究[D].吉林：吉林大学,2007.
[12]吴宏瑞,惠晓威,姜仑. MF—TDMA宽带多媒体通信卫星系统无线资源分配 的研究与设计[J].世界科技研究与发展,2009,31(3)：484-488.
[13]Ki-Dong Lee, Yong-Hoon Cho, Ho-Jin Lee. Optimal Scheduling for Timeslot Assignment in MF-TDMA Broadband Satellite Communications[C]. Vehicular Technology Conference,2002,3:1560-1564.
[14]Huan Yao, Thomas Royster IV, Jeffrey McLamb. JITTER-AWARE TIME-FREAUENCY RESOURCE ALLOCATION AND PACKING ALGORITHM[J]. Military Communications Conference,2010:1-6.
[15]董启甲,张军,张涛.星上MF-TDMA系统信道管理方法[J].电子与信息学报,2009,31(10)：2378-2384.
[16]Seungcheon Kim, Abbas Jamalipour. A Flow Control Scheme Using Broadcsat Information for Internet Services in Multiple-Beam Satellite Networks [J]. IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS,2004, 22(3):482-491.
[17]Seungjin Moon, Seung Hwan Lee, Seung Hyong Rhee. A Flow Control for Reliable Unidirectional Satellite Broadcast Systems[J].ICTC 2010:292-296.
[18]ETSI EN 302 307, v1.1.2, "Digital Video Broadcasting (DVB); Second generation framing structure, channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications"
[19]ETSI EN 301790, v1.4.1, "Digital Video Broadcasting (DVB):Interaction Channel for Satellite distribution Systems"
[20]Aradhana Narula-Tam, Huan Yao, Julee Pandya. Resource Request Strategies for Dynamic Resource Allocation in a Satellite Network [J]. IEEE,2007:1-7.
[21]P.Koutsakis. On providing dynamic resource allocation based on multimedia traffic prediction in satellite system[J]. Computer communicatons,2006,30(15): 404-415.
[22]Dionysia K.Petraki, Markos P.Anastasopoulos, Panayotis G.Cottis. Dynamic resource allocation for DVB-RCS networks[J]. Int.J.Commun.Syst.Network 2008, 26:189-210.
[23]郭庆,王振永,顾学迈.卫星通信系统[M].北京：电子工业出版社,2010：423.
[24]朱建丰,李文华,何新生.卫星多波束天线覆盖特性仿真建模研究[J].通信对抗,2010,(2)：31-35.
[25]Jihwan P.Choi, Vincent W.S. Chan. Optimum Power and Beam Allocation Based on traffic Demands and Channel conditions Over Satellite Downlinks[J]. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS,4(6):2983-2993.
[26]Avadh Nandra, Jivesh Govil, Harkeerat Kaur. Optimization of Satellite Link Design[J]. SECON,2008:147-152.
[27]M.A. Vazquez Castro A. Cardoso R. Rinaldo. Encapsulation and Framing Efficiency of DVB-S2 Satellite Systems[C].Vehicular Technology Conference, 2004:2896-2900.
[28]陆凌晓.卫星移动信道模型分析及信道模拟器方案设计[D].黑龙江：哈尔滨工业大学,2007.
[29]Oriol Sallent, Ramon Agusti. Adaptive S-ALOHA CDMA as an Alternative Way of Integrating Services in Mobile Environments[J]. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY,2000,49(3):936-947.
[30]Bogdan Timus, Pablo Soldati, Dongwoo Kim. Cross-Layer Resource Allocation Model for Cellular-Relaying Network Performance Evaluation[J]. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY,2011,60(6):2765-2776.
[31]David W. Petr, K.M.S.Murthy, Victor S. Modeling and Simulation of the Resource Allocation Porcess in a Bandwidth-on-Demand Satellite Communications Network[J]. IEEE Journal on Areas in Communications,1992, 10(2):465-477.
[32]Barsocchi P. et al. Radio resource management across multiple protocol layers in satellite networks:a tutorial overview[J]. International Journal of Space Communications and Networking 2005,23:265-305.
[33]M.Angeles Vazquez Castro, D.Pradas Fernandez, Catherine Morlet. Cross-Layer Rate Control of VoIP over DVB-S2/RCS[J]. Mobile and Wireless Communications Summit,2007:1-5.
[34]贺坚,王祖林.一种应用于DVB-RCS卫星通信系统的存储优化带宽请求算法[J].通信与网络,2008,(12)：109-112.
[35]秦勇,张军,张涛.基于带宽按需分配的卫星无线资源管理技术研究综述[J].计算机科学,2010,37(2)：23-30.
[36]Maria Kalama, Guray Acar, Barry GEvans.VoIP over DVB-RCS Satellite Systems:A novel Capacity Request Mechanism for improved Voice Activity Detection[J]. Vehicular Technology Conference,2008:2957-2961.
[37]A.Omari, GSeco-Granados, M.A.Vazquez-Castro. ANALYSIS OF THE EFFICIENCY AND DELAY OF BANDWIDTH REQUEST ALGORITHMS IN DVB-RCS[J].2006, Satellite and Space Communications:165-169.
[38]Ki-Kong Lee, Yong-Hoon Cho, Ho-Jin Lee.Optimal Scheduling for Timeslot Assignment in MF-TDMA Broadband Satellite Communications[J]. Vehicular Technology Conference,2002:1560-1564.
[39]Jung-Min Park,Uday Savagaonkar,Edwin K.P. Chong. Allocation of QoS Connections in MF-TDMA Satellite Systems:A Two-Phase Approach. Vehicular Technology,2005,54(1):177-189.
[40]N.Yazdani. Multi-Frequency Time-Division Multiple-Access(MF-TDMA) Resource Packing[C].Proceedings of the 2008 IEEE Military Communications Conference (MILCOM),2008:1-8.
[41]顾畹仪,李瑞国.光纤通信系统(修订版)[M].北京：北京邮电大学出版社,2010：1-3.
[42]毕云阶.论光纤通信技术的主要特征及技术优势[J].科技信息,2007,(28)：71-71.
[43]张涛.济南网通城域光传输网组网设计及应用[D].北京：北京邮电大学,2010.
[44]王光全,乔月强,孙改霞.长途光缆骨干传输网的规划与建设[J].邮电设计技术,2002,(1)：10-15.
[45]R.Metzig, E.Diedrich, R.Reissig. THE TANDEM-X GROUND STATION NETWORK[C]. Geoscience and Remote Sensing Symposium (IGARSS) 2011 IEEE International,2011,902-905.
[46]何宁,王磊.递归型多业务宽带GEO卫星网络跨层流量控制算法研究[J].武汉大学学报,2010,35(5)：532-536.
[47]R.Srikant. The Mathematics of Internet Congestion Control. Cambirdge, MA:Birkhauser,2004.
[48]Nanying Yin Bay Networks Inc. Rate-based Flow Control and It's Application in IP/ATM Internetworks[C]. IEEE Electronics Industries Forum of New England,1997:295-301.
[49]Lee K-K, Cho Y-H, Lee H-J. Improving efficiency of timeslot assignment for non-real time data in a DVB-RCS return link:modeling and algorithm[J]. ETRI Journal 2003,25:211-218.
[50]Antoni Morell, Gonzalo Seco-Granados. Joint Time Slot Optimization and Fair Bandwidth Allocation for DVB-RCS Systems. Global Telecommunications Conference[C],2006:1-5.
[2]闵士权.我国下一代通信卫星研究现状和发展策略思考[A].第六届卫星通信新业务新技术学术年会[C].北京,2010.24-34.
[3]闰忠文.新一代宽带多媒体卫星通信系统[A].第三届全国因特网与音频广播发展研讨会[C].北京,2003.25-29.
[4]闰忠文.空中交换机：中国的宽带卫星系统构想[A].中国卫星通信广播电视技术第七届国际研讨会[C].北京,2006：1-6.
[5]Apostolos Destounis, Athanasios Panagopoulos. Dynamic Power Allocation for Broadband Multi-Beam Satellite Communication Networks. Communications Letters,2011,15(4):380-382.
[6]Qinghua Zheng, Yongling Song, Jun Liu. A Resource Reservation and Scheduling Algorithm for Learning On-Demand System over Satellite and Cable Network[J]. Proceedings of the IEEE Fourth International Symposium on Multimedia Software Engineering,2002:166-173.
[7]Mohammad Mahfujur Rashid, Md. Rafiqul Islam, AHM Zahirul Alam. Rain Fade and It's Effect Analysis for Earth-to-Satellite Microwave Link Based on Measured Rainfall Statistics in Bangladesh[J]. IEEE 9th Malaysia Internatioanal Conference,2009:244-249.
[8]Erdenekhuu Norinpel. Microwave Attenuation due to Dust and Sand Storm in earth-Satellite Link[J]. IFOST 2007:599-601.
[9]Bruce Bennett, Christohper Holt. DVB-S2 BENEFITS FOR MILITARY BROADCAST SYSTEMS[J]. Military Communications Conference,2005: 148-154.
[10]Jong Gyu Oh, Joon Tae Kim. An Alternative Carrier Frequency Synchronization Scheme for DVB-S2 Systems[J]. Military Communications Conference, 2010:529-533.
[11]安宁.基于TDMA的GEO卫星系统接入控制方式的研究[D].吉林：吉林大学,2007.
[12]吴宏瑞,惠晓威,姜仑. MF—TDMA宽带多媒体通信卫星系统无线资源分配 的研究与设计[J].世界科技研究与发展,2009,31(3)：484-488.
[13]Ki-Dong Lee, Yong-Hoon Cho, Ho-Jin Lee. Optimal Scheduling for Timeslot Assignment in MF-TDMA Broadband Satellite Communications[C]. Vehicular Technology Conference,2002,3:1560-1564.
[14]Huan Yao, Thomas Royster IV, Jeffrey McLamb. JITTER-AWARE TIME-FREAUENCY RESOURCE ALLOCATION AND PACKING ALGORITHM[J]. Military Communications Conference,2010:1-6.
[15]董启甲,张军,张涛.星上MF-TDMA系统信道管理方法[J].电子与信息学报,2009,31(10)：2378-2384.
[16]Seungcheon Kim, Abbas Jamalipour. A Flow Control Scheme Using Broadcsat Information for Internet Services in Multiple-Beam Satellite Networks [J]. IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS,2004, 22(3):482-491.
[17]Seungjin Moon, Seung Hwan Lee, Seung Hyong Rhee. A Flow Control for Reliable Unidirectional Satellite Broadcast Systems[J].ICTC 2010:292-296.
[18]ETSI EN 302 307, v1.1.2, "Digital Video Broadcasting (DVB); Second generation framing structure, channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications"
[19]ETSI EN 301790, v1.4.1, "Digital Video Broadcasting (DVB):Interaction Channel for Satellite distribution Systems"
[20]Aradhana Narula-Tam, Huan Yao, Julee Pandya. Resource Request Strategies for Dynamic Resource Allocation in a Satellite Network [J]. IEEE,2007:1-7.
[21]P.Koutsakis. On providing dynamic resource allocation based on multimedia traffic prediction in satellite system[J]. Computer communicatons,2006,30(15): 404-415.
[22]Dionysia K.Petraki, Markos P.Anastasopoulos, Panayotis G.Cottis. Dynamic resource allocation for DVB-RCS networks[J]. Int.J.Commun.Syst.Network 2008, 26:189-210.
[23]郭庆,王振永,顾学迈.卫星通信系统[M].北京：电子工业出版社,2010：423.
[24]朱建丰,李文华,何新生.卫星多波束天线覆盖特性仿真建模研究[J].通信对抗,2010,(2)：31-35.
[25]Jihwan P.Choi, Vincent W.S. Chan. Optimum Power and Beam Allocation Based on traffic Demands and Channel conditions Over Satellite Downlinks[J]. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS,4(6):2983-2993.
[26]Avadh Nandra, Jivesh Govil, Harkeerat Kaur. Optimization of Satellite Link Design[J]. SECON,2008:147-152.
[27]M.A. Vazquez Castro A. Cardoso R. Rinaldo. Encapsulation and Framing Efficiency of DVB-S2 Satellite Systems[C].Vehicular Technology Conference, 2004:2896-2900.
[28]陆凌晓.卫星移动信道模型分析及信道模拟器方案设计[D].黑龙江：哈尔滨工业大学,2007.
[29]Oriol Sallent, Ramon Agusti. Adaptive S-ALOHA CDMA as an Alternative Way of Integrating Services in Mobile Environments[J]. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY,2000,49(3):936-947.
[30]Bogdan Timus, Pablo Soldati, Dongwoo Kim. Cross-Layer Resource Allocation Model for Cellular-Relaying Network Performance Evaluation[J]. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY,2011,60(6):2765-2776.
[31]David W. Petr, K.M.S.Murthy, Victor S. Modeling and Simulation of the Resource Allocation Porcess in a Bandwidth-on-Demand Satellite Communications Network[J]. IEEE Journal on Areas in Communications,1992, 10(2):465-477.
[32]Barsocchi P. et al. Radio resource management across multiple protocol layers in satellite networks:a tutorial overview[J]. International Journal of Space Communications and Networking 2005,23:265-305.
[33]M.Angeles Vazquez Castro, D.Pradas Fernandez, Catherine Morlet. Cross-Layer Rate Control of VoIP over DVB-S2/RCS[J]. Mobile and Wireless Communications Summit,2007:1-5.
[34]贺坚,王祖林.一种应用于DVB-RCS卫星通信系统的存储优化带宽请求算法[J].通信与网络,2008,(12)：109-112.
[35]秦勇,张军,张涛.基于带宽按需分配的卫星无线资源管理技术研究综述[J].计算机科学,2010,37(2)：23-30.
[36]Maria Kalama, Guray Acar, Barry GEvans.VoIP over DVB-RCS Satellite Systems:A novel Capacity Request Mechanism for improved Voice Activity Detection[J]. Vehicular Technology Conference,2008:2957-2961.
[37]A.Omari, GSeco-Granados, M.A.Vazquez-Castro. ANALYSIS OF THE EFFICIENCY AND DELAY OF BANDWIDTH REQUEST ALGORITHMS IN DVB-RCS[J].2006, Satellite and Space Communications:165-169.
[38]Ki-Kong Lee, Yong-Hoon Cho, Ho-Jin Lee.Optimal Scheduling for Timeslot Assignment in MF-TDMA Broadband Satellite Communications[J]. Vehicular Technology Conference,2002:1560-1564.
[39]Jung-Min Park,Uday Savagaonkar,Edwin K.P. Chong. Allocation of QoS Connections in MF-TDMA Satellite Systems:A Two-Phase Approach. Vehicular Technology,2005,54(1):177-189.
[40]N.Yazdani. Multi-Frequency Time-Division Multiple-Access(MF-TDMA) Resource Packing[C].Proceedings of the 2008 IEEE Military Communications Conference (MILCOM),2008:1-8.
[41]顾畹仪,李瑞国.光纤通信系统(修订版)[M].北京：北京邮电大学出版社,2010：1-3.
[42]毕云阶.论光纤通信技术的主要特征及技术优势[J].科技信息,2007,(28)：71-71.
[43]张涛.济南网通城域光传输网组网设计及应用[D].北京：北京邮电大学,2010.
[44]王光全,乔月强,孙改霞.长途光缆骨干传输网的规划与建设[J].邮电设计技术,2002,(1)：10-15.
[45]R.Metzig, E.Diedrich, R.Reissig. THE TANDEM-X GROUND STATION NETWORK[C]. Geoscience and Remote Sensing Symposium (IGARSS) 2011 IEEE International,2011,902-905.
[46]何宁,王磊.递归型多业务宽带GEO卫星网络跨层流量控制算法研究[J].武汉大学学报,2010,35(5)：532-536.
[47]R.Srikant. The Mathematics of Internet Congestion Control. Cambirdge, MA:Birkhauser,2004.
[48]Nanying Yin Bay Networks Inc. Rate-based Flow Control and It's Application in IP/ATM Internetworks[C]. IEEE Electronics Industries Forum of New England,1997:295-301.
[49]Lee K-K, Cho Y-H, Lee H-J. Improving efficiency of timeslot assignment for non-real time data in a DVB-RCS return link:modeling and algorithm[J]. ETRI Journal 2003,25:211-218.
[50]Antoni Morell, Gonzalo Seco-Granados. Joint Time Slot Optimization and Fair Bandwidth Allocation for DVB-RCS Systems. Global Telecommunications Conference[C],2006:1-5.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |