协作与中继传输系统的MAC层协议设计与实现
摘要
3GPP对下一代移动通信IMT-Advanced系统提出了最高数据速率至1Gbit/s的传输目标和更大带宽的需求,无线频段向频率资源更丰富的高频段扩展。在标准的指定和讨论中,协作与中继技术由于对小组组网尤其是边缘覆盖能力的提升而受到更多关注,成为LTE-Advanced用于提高频谱效率的两项关键技术。论文结合项目工作,分别对中继试验系统和协作多点传输系统中的MAC层协议设计与实现进行了研究。
基于高频段中继项目,论文阐述了MAC层协议的设计,进行子层和功能模块的划分,描述了业务数据和控制数据的处理流程。HARQ作为高频段中继系统采用的差错控制方式,论文介绍了它的基本原理,设计了选择重传的HARQ流程。另外,直传／中继模式的切换是在物理层和MAC层的共同配合下完成的,论文对模式切换流程进行了设计。
之后,论文介绍了高频段中继试验系统中MAC层协议实现的硬件环境,阐述了子层和功能模块的软件实现方法,并对MAC PDU.本地控制信息和本地指示信息的格式进行了说明。总结了MAC层调试遇到的问题及解决方法、系统测试方法及结果分析,对HARQ的实现效果进行了测试分析。
接着,论文对协作多点传输系统中MAC层的资源调度方案进行了详细论述。介绍了协作多点1传输的基本原理和分类,以及小区间资源管理策略。搭建静态协作集划分的联合传输系统仿真平台,对小区边缘用户的判定方法进行了描述。阐述了联合传输系统中的轮询调度方案和比例公平调度方案,并对这两种调度方案进行了仿真分析,证明可以提高小区边缘用户吞吐量。
论文设计的MAC层协议部分在试验系统平台上实现,可以作为今后系统进一步研究和开发的基础。仿真的CoMP系统资源调度方案实现复杂度较低,对今后CoMP系统的工程实现具有一定意义。
A transmission aim, which has maximum data speed up to1Gbit/s, broader bandwidth and wireless band expanding to high frequency, was proposed by3GPP for the next generation mobile communication IMT-Advanced systems. In the discussion and appointment of the standards, cooperation and relay are two key technologies for LTE-Advanced to improve the spectrum efficiency due to their capability to enhance the cell edge coverage. This paper, combined with the projects, focus on the protocol design and implementation of MAC layer in the cooperation and relay transmission trail system, respectively.
Based on the High Frequency (HF) Relay project, the MAC layer protocol design and implementation is described, processing of service data and control data is detailed. The principle of HARQ which is applied as the error control method of the HF relay system is introduced. HARQ process of select repeat is also designed. Mode switch of the relay system is under the cooperation of physical and MAC layer and it is designed in this paper.
The hardware environment of the MAC layer protocol implementation in the HF relay trial system is introduced and software implementation scheme of the sub-layer and functional module is described. The format of MAC PDU, local control information and local index information is illustrated. The problem and the corresponding resolution during the debugging of MAC layer implementation, system testing method and result analysis are concluded while the effect of the HARQ implementation is also analyzed.
Resource scheduling scheme of the MAC layer in the Coordinated Multi-point transmission system is detailed. The principle and classification of the coordinated multi-point as well as the inter-cell resource management strategy is introduced. The joint transmission system simulation platform of the static cooperating set division is built and the determination method of the cell edge users is depicted. Two scheduling schemes in the joint transmission system, the polling scheduling approach and proportional fair scheduling method, are simulated and proved that they can enable the improvement of cell edge user throughput.
Part of the MAC layer protocol designed in this paper has already been implemented in the transmission trail system and can be used as the foundation of research and development for the relay system in the future. The resource scheduling algorithm has low implementation complexity in the CoMP scenario and is useful for the project implementation of CoMP system.
基于高频段中继项目,论文阐述了MAC层协议的设计,进行子层和功能模块的划分,描述了业务数据和控制数据的处理流程。HARQ作为高频段中继系统采用的差错控制方式,论文介绍了它的基本原理,设计了选择重传的HARQ流程。另外,直传／中继模式的切换是在物理层和MAC层的共同配合下完成的,论文对模式切换流程进行了设计。
之后,论文介绍了高频段中继试验系统中MAC层协议实现的硬件环境,阐述了子层和功能模块的软件实现方法,并对MAC PDU.本地控制信息和本地指示信息的格式进行了说明。总结了MAC层调试遇到的问题及解决方法、系统测试方法及结果分析,对HARQ的实现效果进行了测试分析。
接着,论文对协作多点传输系统中MAC层的资源调度方案进行了详细论述。介绍了协作多点1传输的基本原理和分类,以及小区间资源管理策略。搭建静态协作集划分的联合传输系统仿真平台,对小区边缘用户的判定方法进行了描述。阐述了联合传输系统中的轮询调度方案和比例公平调度方案,并对这两种调度方案进行了仿真分析,证明可以提高小区边缘用户吞吐量。
论文设计的MAC层协议部分在试验系统平台上实现,可以作为今后系统进一步研究和开发的基础。仿真的CoMP系统资源调度方案实现复杂度较低,对今后CoMP系统的工程实现具有一定意义。
A transmission aim, which has maximum data speed up to1Gbit/s, broader bandwidth and wireless band expanding to high frequency, was proposed by3GPP for the next generation mobile communication IMT-Advanced systems. In the discussion and appointment of the standards, cooperation and relay are two key technologies for LTE-Advanced to improve the spectrum efficiency due to their capability to enhance the cell edge coverage. This paper, combined with the projects, focus on the protocol design and implementation of MAC layer in the cooperation and relay transmission trail system, respectively.
Based on the High Frequency (HF) Relay project, the MAC layer protocol design and implementation is described, processing of service data and control data is detailed. The principle of HARQ which is applied as the error control method of the HF relay system is introduced. HARQ process of select repeat is also designed. Mode switch of the relay system is under the cooperation of physical and MAC layer and it is designed in this paper.
The hardware environment of the MAC layer protocol implementation in the HF relay trial system is introduced and software implementation scheme of the sub-layer and functional module is described. The format of MAC PDU, local control information and local index information is illustrated. The problem and the corresponding resolution during the debugging of MAC layer implementation, system testing method and result analysis are concluded while the effect of the HARQ implementation is also analyzed.
Resource scheduling scheme of the MAC layer in the Coordinated Multi-point transmission system is detailed. The principle and classification of the coordinated multi-point as well as the inter-cell resource management strategy is introduced. The joint transmission system simulation platform of the static cooperating set division is built and the determination method of the cell edge users is depicted. Two scheduling schemes in the joint transmission system, the polling scheduling approach and proportional fair scheduling method, are simulated and proved that they can enable the improvement of cell edge user throughput.
Part of the MAC layer protocol designed in this paper has already been implemented in the transmission trail system and can be used as the foundation of research and development for the relay system in the future. The resource scheduling algorithm has low implementation complexity in the CoMP scenario and is useful for the project implementation of CoMP system.
引文
[1]http://expo2010.ifeng.com/dongtai/detail 2010 06/22/1654849 0.shtml
[2]王文博,郑侃.宽带无线通信OFDM技术.人民邮电出版社.2003年10月.
[3]Ajay R Mishra.Advanced Cellular Network Planning and Optimisation 2G/2.5G/3G/...Evolution to 4G.机械工业出版社.2008.8
[4]赵晓秋等.3G/B3G网络核心技术与应用.机械工业出版社.2008.1
[5]陶小峰,戴佐俊,唐超等.广义蜂窝网络结构及切换模式-群小区及群切换.电子学报.第12A期.2004年12月.
[6]郑淑琴.LTE-Advanced MAC子层干扰管理策略研究与实现.[学位论文].北京.北京邮电大学.2011年.
[7]沈嘉,索士强,全海洋等.3GPP长期演进(LTE)技术原理与系统设计.人民邮电出版社.2008年11月：P321.
[8]Stefania Sesia,Issam Toufik,Matthew Baker. LTE-The UMTS Long Term Evolution From Theory to Practice. John Wiley & Sons Ltd.2009.
[9]孔晓琨.基于LTE的上行HARQ研究及其MAC层实现.[学位论文].西安.西安电子科技大学.2010年.
[10]EP8548A 1.3(DES0212) User Manual.Embedded Planet,Inc.2007.P9.
[11]MPC8548E PowerQUICCTM Ⅲ Integrated Processor Family Reference Manual,Rev.2.Freescale Semiconductor,Inc.2007.P230.
[12]Jonathan Corbet,Alessandro Rubini & Greg Korah-Hartman.Linux设备驱动程序.中国电力出版社.2006年1月.P435.
[13]周卫东,蔺妍,刘利强.嵌入式操作系统VxWorks中网络协议存储池原理及实现.
[14]Wind River Workbench User's Guide 3.0.Wind River Systems,Inc.2007.P3.
[15]王卓.LTE-Advanced系统中的协作传输技术研究.[学位论文].北京.北京邮电大学.2011年.
[16]杨姗.LTE-A CoMP系统的关键技术研究及性能分析.[学位论文].北京.北京邮电大学.2012年.
[17]Mamoru Sawahashi,Yoshihisa Kishiyama,Akihito Morimoto,etc.Coordinated multipoint transmission reception techniques for LTE-advanced.IEEE wireless communications.2010.17(3).
[18]丁奇,杨桢.大话移动通信.人民邮电出版社.2011年.P256.
[19]3GPP R3-070702, "Reply LS to R3-070527/R1-071242 on Backhaul(X2 interface) Delay". Mar.2007.
[20]3GPP TR 36.814 V9.0.0(2010-03).
[2]王文博,郑侃.宽带无线通信OFDM技术.人民邮电出版社.2003年10月.
[3]Ajay R Mishra.Advanced Cellular Network Planning and Optimisation 2G/2.5G/3G/...Evolution to 4G.机械工业出版社.2008.8
[4]赵晓秋等.3G/B3G网络核心技术与应用.机械工业出版社.2008.1
[5]陶小峰,戴佐俊,唐超等.广义蜂窝网络结构及切换模式-群小区及群切换.电子学报.第12A期.2004年12月.
[6]郑淑琴.LTE-Advanced MAC子层干扰管理策略研究与实现.[学位论文].北京.北京邮电大学.2011年.
[7]沈嘉,索士强,全海洋等.3GPP长期演进(LTE)技术原理与系统设计.人民邮电出版社.2008年11月：P321.
[8]Stefania Sesia,Issam Toufik,Matthew Baker. LTE-The UMTS Long Term Evolution From Theory to Practice. John Wiley & Sons Ltd.2009.
[9]孔晓琨.基于LTE的上行HARQ研究及其MAC层实现.[学位论文].西安.西安电子科技大学.2010年.
[10]EP8548A 1.3(DES0212) User Manual.Embedded Planet,Inc.2007.P9.
[11]MPC8548E PowerQUICCTM Ⅲ Integrated Processor Family Reference Manual,Rev.2.Freescale Semiconductor,Inc.2007.P230.
[12]Jonathan Corbet,Alessandro Rubini & Greg Korah-Hartman.Linux设备驱动程序.中国电力出版社.2006年1月.P435.
[13]周卫东,蔺妍,刘利强.嵌入式操作系统VxWorks中网络协议存储池原理及实现.
[14]Wind River Workbench User's Guide 3.0.Wind River Systems,Inc.2007.P3.
[15]王卓.LTE-Advanced系统中的协作传输技术研究.[学位论文].北京.北京邮电大学.2011年.
[16]杨姗.LTE-A CoMP系统的关键技术研究及性能分析.[学位论文].北京.北京邮电大学.2012年.
[17]Mamoru Sawahashi,Yoshihisa Kishiyama,Akihito Morimoto,etc.Coordinated multipoint transmission reception techniques for LTE-advanced.IEEE wireless communications.2010.17(3).
[18]丁奇,杨桢.大话移动通信.人民邮电出版社.2011年.P256.
[19]3GPP R3-070702, "Reply LS to R3-070527/R1-071242 on Backhaul(X2 interface) Delay". Mar.2007.
[20]3GPP TR 36.814 V9.0.0(2010-03).