基于TD-SCDMA系统的HSPA技术研究
摘要
高速分组接入(HSPA)技术借助于在Node B上采用快速链路自适应控制和快速物理层重传及传输合并以及快速分组调度等技术实现分组数据业务的高速接入,从而达到高吞吐量、低时延和高峰值速率的系统性能。不但能够满足下一个阶段的应用需求,而且对3G今后发展起到承前启后的作用。HSPA技术正日益成为移动通信领域研究的热点。
本文在对HSPA的原理、背景技术进行了讨论的基础上,研究了HSPA在TD-SCDMA移动通信系统中的应用,并根据高速上行分组接入(HSUPA)的特点,重点研究了HSUPA在TD-SCDMA系统中的两种具体实现方案,通过比较得出两种方案对系统性能产生的不同影响;并研究了用户设备(UE)的功率控制技术。
另外,本文结合TD-SCDMA系统,重点研究了HSPA的两种关键技术自适应调制编码(AMC)和混合自动重传请求(HARQ)。为了克服测量误差对AMC的影响,采用了最大似然(ML)信道质量估计算法,并根据仿真结果对算法进行了修正,修正后的算法能够较为准确的估计信道质量。针对HARQ的技术特点,重点研究了HARQ中ChaseCombining方案的算法实现,并对HSUPA中HARQ的Chase Combining方案做了仿真,采用Chase Combining的HARQ可以降低误块率,并具有显著的容量增益。
最后,通过基于TD-SCDMA系统的高速上行分组接入(HSDPA)动态链路仿真,进一步验证了AMC中的ML信道质量估计修正算法具有明显改善HSDPA性能,提高系统吞吐量的功能;同时,也验证了采用Chase Combining的HARQ与AMC技术相结合,能有效克服AMC的缺点,显著改善系统性能。
It can achieve the high volume of goods handled, the low delay and crest value speed of the system performance, resorting to fast technical realization integrated data service and so on link adaptive control and fast physical level retransmit and transmission combining as well as fast grouping dispatch in the HSPA technology on Node B high speed connection. It not only has meet the next stage application service need, but also has great influence on the further development of 3G. HSPA is growing into the hot area as the study of the 3rd generation mobile communication systems.
This paper studied the applications of HSPA in the TD-SCDMA based on the theory and background technique of HSPA, and put emphases on the two kinds of embodies of HSUPA in the TD-SCDMA based on the characteristic of HSUPA. This paper also studied the power controlling skills of UE in addition to AMC skills.
On the other side, this paper mainly studied two key skills of HSPA in TD-SCDMA system: AMC and HARQ. We bring forward ML algorithm for the channel quality estimation to overcome the affection of delaying. By which arithmetic is modified, we conclude that channel quality can be more exactly estimated by modified arithmetic. This paper mainly studied the arithmetic achievement of the Chase Combing scheme of HARQ and link simulation Chase Combining method of HARQ in the HSUPA. We conclude that the HAPQ adopting Chase Combining method can reduce BLER, even clearly increase capacity.
At last, we farther approved that ML algorithm for the channel quality estimation of AMC can improve HSDPA capability and increase throughput of system by HSDPA link simulation. At the same time, we also approved that combination of HARQ and AMC adopting Chase Combining method can efficiently overcome the defects of AMC and improve system capability.
本文在对HSPA的原理、背景技术进行了讨论的基础上,研究了HSPA在TD-SCDMA移动通信系统中的应用,并根据高速上行分组接入(HSUPA)的特点,重点研究了HSUPA在TD-SCDMA系统中的两种具体实现方案,通过比较得出两种方案对系统性能产生的不同影响;并研究了用户设备(UE)的功率控制技术。
另外,本文结合TD-SCDMA系统,重点研究了HSPA的两种关键技术自适应调制编码(AMC)和混合自动重传请求(HARQ)。为了克服测量误差对AMC的影响,采用了最大似然(ML)信道质量估计算法,并根据仿真结果对算法进行了修正,修正后的算法能够较为准确的估计信道质量。针对HARQ的技术特点,重点研究了HARQ中ChaseCombining方案的算法实现,并对HSUPA中HARQ的Chase Combining方案做了仿真,采用Chase Combining的HARQ可以降低误块率,并具有显著的容量增益。
最后,通过基于TD-SCDMA系统的高速上行分组接入(HSDPA)动态链路仿真,进一步验证了AMC中的ML信道质量估计修正算法具有明显改善HSDPA性能,提高系统吞吐量的功能;同时,也验证了采用Chase Combining的HARQ与AMC技术相结合,能有效克服AMC的缺点,显著改善系统性能。
It can achieve the high volume of goods handled, the low delay and crest value speed of the system performance, resorting to fast technical realization integrated data service and so on link adaptive control and fast physical level retransmit and transmission combining as well as fast grouping dispatch in the HSPA technology on Node B high speed connection. It not only has meet the next stage application service need, but also has great influence on the further development of 3G. HSPA is growing into the hot area as the study of the 3rd generation mobile communication systems.
This paper studied the applications of HSPA in the TD-SCDMA based on the theory and background technique of HSPA, and put emphases on the two kinds of embodies of HSUPA in the TD-SCDMA based on the characteristic of HSUPA. This paper also studied the power controlling skills of UE in addition to AMC skills.
On the other side, this paper mainly studied two key skills of HSPA in TD-SCDMA system: AMC and HARQ. We bring forward ML algorithm for the channel quality estimation to overcome the affection of delaying. By which arithmetic is modified, we conclude that channel quality can be more exactly estimated by modified arithmetic. This paper mainly studied the arithmetic achievement of the Chase Combing scheme of HARQ and link simulation Chase Combining method of HARQ in the HSUPA. We conclude that the HAPQ adopting Chase Combining method can reduce BLER, even clearly increase capacity.
At last, we farther approved that ML algorithm for the channel quality estimation of AMC can improve HSDPA capability and increase throughput of system by HSDPA link simulation. At the same time, we also approved that combination of HARQ and AMC adopting Chase Combining method can efficiently overcome the defects of AMC and improve system capability.
引文
[1]彭林.第三代移动通信技术[M].北京;电子工业出版社,2003;4-6.
[2]李世鹤,杨贵亮,李峰.TD-SCDMARTT的空间接口技术综述[J].电信建设,2001,(2);20-31.
[3]李世鹤.TD-SCDMA第三代移动通信系统标准[M].北京;人民邮电出版社,2003;1-3.
[4]李世鹤,李军.IMT-2000及TD-SCDMA系统[J].通信世界,2000,13;7-8.
[5]谢俊松,范平志.移动高速数据传输与HSDPA最新进展[J].计算机应用,2002,22(2);1-4.
[6]3GPP TS 25.306 V5.2.0.UTRA High Speed Downlink Packet Access(HSDPA); Overall description,Stage 2[S].Sophia Antipolis Valbonne;3rd Generation Partnership Project,2002.
[7]3GPP TR 25.808 V6.0.0.FDD Enhanced uplink; Physical LayerAspects[R].Sophia Antipolis Valbonne;3rd Generation Partnership Project,2005.
[8]谢显中.TD-SCDMA第三代移动通信系统技术与实现[M].北京;电子工业出版社,2003;5-38.
[9]彭木根,王文博.TD-SCDMA移动通信系统[M].北京;机械工业出版社,2005;18-20.
[10]李小文,李贵勇,陈贤亮.TD-SCDMA移动通信系统、信令及实现[M].北京;人民邮电出版社,2003;9-10.
[11]Paul Bender,Peter Black.CDMA/HDR;A Bandwidth-Efficient High-Speed Wireless Data Service for Nomadic Users.IEEE Communications Magazine,2000,(3);70-77.
[12]Theodore S.Rappaport.无线通信原理与应用[M].北京;电子工业出版社,1999;205-243.
[13]3GPP TS 25.855 V5.4.0.High Speed Downlink Packet Access(HSDPA); Overall UTRAN Description[S].Sophia Antipolis Valbonne;3rd Generation Partnership Project,2003.
[14]3GPP TS 25.308 V5.4.0.UTRA High Speed Downlink Packet Access(HSDPA); Overall description.Stage 2[S].Sophia Antipolis Valbonne;3rd Generation Partnership Project,2003.
[15]3GPP TR 25.848 V4.0.0.Physical Layer Aspects of UTRA High Speed Downlink Packet Access[R].Sophia Antipolis Valbonne;3rd Generation Partnership Project,2001.
[16]3GPP TR 25.835 V1.0.0.Report on Hybrid ARQ Type Ⅱ/Ⅲ[R].Sophia Antipolis Valbonne;3rd Generation Partnership Project,2000.
[17]3GPP TR 25.858 V4.0.0.Physical layer aspects of UTRA High Speed Downlink Packet Access[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2001.
[18] 3GPP TR 25.950 V4.0.1.UTRA High Speed Downlink Packet Access[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2005.
[19] 3GPP TR 25.804 V6.0.0. Feasibility Study on Uplink Enhancements for UTRA TDD[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2005.
[20] 3GPP TR 25.896 V6.0.0. Feasibility Study for Enhanced Uplink for UTRA FDD[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2004.
[21] 3GPP TS 25.224 V5.6.0. Physical layer procedures (TDD) [S]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2003.
[22] 3GPP TR 25.826 V1.0.0. 3.84 Mcps TDD Enhanced uplink; Physical Layer Aspects[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2006.
[23] 3GPP TS 25.309 V6.5.0 . FDD Enhanced uplink:Overall Description,Stage 2[S]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2005.
[24] 3GPP TS 25.102 V5.2.0. User Equipment (UE) radio transmission and reception (TDD) [S]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2002.
[25] 3GPP TR 25.877 V5.1.0.High Speed Downlink Packet Access: Iub/Iur protocol aspects[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2002.
[26] 3GPP TS 25.321 V5.3.0. Medium Access Control (MAC) Protocol Specification[S]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2002.
[27] Mansour A.Aldajanj and Ali H, Aqyed . Adaptive Predictive Power Control for the Uplink Channel in DS-CDMA Cellular Systems[J]. IEEE Trans. Inform. Theory, 2003, 52(6): 1447-1462.
[28] M.Andersin. Real-time estimation of the signal to Interference ratio in cellular radio systems[J]. In Proceedings IEEE Vehicular Technology Conference, 1997, 2 (3): 1089-1093.
[29] A.j.Goldsmith and P.P.Varaiya.Capacity of fading channels with channel side information [J]. IEEE Trans. Inform. Theory, 1997, 43 (6): 1986-1992.
[30] 3GPP TR 25.827 VI.0.0. 1.28 Mcps TDD Enhanced uplink; Physical Layer Aspects[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2006.
[31] 3GPP TS 25.222 V7.1.0. Multiplexing and channel coding (TDD) [S]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2006.
[2]李世鹤,杨贵亮,李峰.TD-SCDMARTT的空间接口技术综述[J].电信建设,2001,(2);20-31.
[3]李世鹤.TD-SCDMA第三代移动通信系统标准[M].北京;人民邮电出版社,2003;1-3.
[4]李世鹤,李军.IMT-2000及TD-SCDMA系统[J].通信世界,2000,13;7-8.
[5]谢俊松,范平志.移动高速数据传输与HSDPA最新进展[J].计算机应用,2002,22(2);1-4.
[6]3GPP TS 25.306 V5.2.0.UTRA High Speed Downlink Packet Access(HSDPA); Overall description,Stage 2[S].Sophia Antipolis Valbonne;3rd Generation Partnership Project,2002.
[7]3GPP TR 25.808 V6.0.0.FDD Enhanced uplink; Physical LayerAspects[R].Sophia Antipolis Valbonne;3rd Generation Partnership Project,2005.
[8]谢显中.TD-SCDMA第三代移动通信系统技术与实现[M].北京;电子工业出版社,2003;5-38.
[9]彭木根,王文博.TD-SCDMA移动通信系统[M].北京;机械工业出版社,2005;18-20.
[10]李小文,李贵勇,陈贤亮.TD-SCDMA移动通信系统、信令及实现[M].北京;人民邮电出版社,2003;9-10.
[11]Paul Bender,Peter Black.CDMA/HDR;A Bandwidth-Efficient High-Speed Wireless Data Service for Nomadic Users.IEEE Communications Magazine,2000,(3);70-77.
[12]Theodore S.Rappaport.无线通信原理与应用[M].北京;电子工业出版社,1999;205-243.
[13]3GPP TS 25.855 V5.4.0.High Speed Downlink Packet Access(HSDPA); Overall UTRAN Description[S].Sophia Antipolis Valbonne;3rd Generation Partnership Project,2003.
[14]3GPP TS 25.308 V5.4.0.UTRA High Speed Downlink Packet Access(HSDPA); Overall description.Stage 2[S].Sophia Antipolis Valbonne;3rd Generation Partnership Project,2003.
[15]3GPP TR 25.848 V4.0.0.Physical Layer Aspects of UTRA High Speed Downlink Packet Access[R].Sophia Antipolis Valbonne;3rd Generation Partnership Project,2001.
[16]3GPP TR 25.835 V1.0.0.Report on Hybrid ARQ Type Ⅱ/Ⅲ[R].Sophia Antipolis Valbonne;3rd Generation Partnership Project,2000.
[17]3GPP TR 25.858 V4.0.0.Physical layer aspects of UTRA High Speed Downlink Packet Access[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2001.
[18] 3GPP TR 25.950 V4.0.1.UTRA High Speed Downlink Packet Access[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2005.
[19] 3GPP TR 25.804 V6.0.0. Feasibility Study on Uplink Enhancements for UTRA TDD[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2005.
[20] 3GPP TR 25.896 V6.0.0. Feasibility Study for Enhanced Uplink for UTRA FDD[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2004.
[21] 3GPP TS 25.224 V5.6.0. Physical layer procedures (TDD) [S]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2003.
[22] 3GPP TR 25.826 V1.0.0. 3.84 Mcps TDD Enhanced uplink; Physical Layer Aspects[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2006.
[23] 3GPP TS 25.309 V6.5.0 . FDD Enhanced uplink:Overall Description,Stage 2[S]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2005.
[24] 3GPP TS 25.102 V5.2.0. User Equipment (UE) radio transmission and reception (TDD) [S]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2002.
[25] 3GPP TR 25.877 V5.1.0.High Speed Downlink Packet Access: Iub/Iur protocol aspects[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2002.
[26] 3GPP TS 25.321 V5.3.0. Medium Access Control (MAC) Protocol Specification[S]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2002.
[27] Mansour A.Aldajanj and Ali H, Aqyed . Adaptive Predictive Power Control for the Uplink Channel in DS-CDMA Cellular Systems[J]. IEEE Trans. Inform. Theory, 2003, 52(6): 1447-1462.
[28] M.Andersin. Real-time estimation of the signal to Interference ratio in cellular radio systems[J]. In Proceedings IEEE Vehicular Technology Conference, 1997, 2 (3): 1089-1093.
[29] A.j.Goldsmith and P.P.Varaiya.Capacity of fading channels with channel side information [J]. IEEE Trans. Inform. Theory, 1997, 43 (6): 1986-1992.
[30] 3GPP TR 25.827 VI.0.0. 1.28 Mcps TDD Enhanced uplink; Physical Layer Aspects[R]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2006.
[31] 3GPP TS 25.222 V7.1.0. Multiplexing and channel coding (TDD) [S]. Sophia Antipolis Valbonne: 3~(rd) Generation Partnership Project, 2006.