基于802.16e协议MAC模块的研究与设计
摘要
IEEE 802.16系列标准又称为WirelessMAN空中接口标准,是由WiMAX论坛主推的宽带无线接入标准,主要应用于无线城域网(WMAN,Wireless MetropolitanArea Network)范围。本论文研究了WiMAX当前最具有发展前景的802.16e协议,并在此基础上设计出了一个高效的媒体接入控制层(MAC,Medium AccessControl)软件控制平台。
WiMAX作为3G诞生之后新兴的宽带无线技术,拥有高达75M带宽和全IP的网络架构,可以简单高效的与现有Internet网络进行无缝结合,在下一代无线网络传输技术中有着非常强劲的竞争力。无线网络传输与有线网络比较起来,具有误码率高、信道可靠性差和传输环境变化快等不利因素,如何快速有效的解决这些传输难题,是保证和提高无线网络传输质量的关键。在802.16系列协议中,MAC作为唯一与物理层传输技术紧密结合的软件控制平台,对保证无线网络传输信道的稳定和效率,起着决定性的作用。
在充分研究协议的基础上,论文在创新方面,归纳如下:
1.给出了802.16e协议的入网控制算法解决方案。论文对算法的难点进行了分析,并结合实际硬件环境设计出了有效的实现方法。在使用很少内存的情况下,可以支持多达512个用户稳定入网运行;
2.在充分研究了现有的切换技术基础上,开发出了高性能的移动切换算法。论文设计的切换算法完全达到WiMAX系统设计要求,支持在快速移动情况下切换的可靠性和稳定性,很好的解决了传统切换算法中存在的用户掉话问题;
3.完成的MAC平台具有高可移植性、高性能、运行稳定等等优点,可以支持linux和vxWorks等多种操作系统,这些成果现在已经应用到中科院计算所研制开发的宽带移动通信基站和终端原型系统上。
IEEE 802.16 standard called Air Interface for WirelessMAN standard is supported by WIMAX forum. It applies to the range of WMAN (Wireless Metropolitan Area Network) mainly. This thesis has studied 802.16e standard, to design a high-efficient software platform that has a high adaptive capacity and high performance.
IEEE 802.16 is the new developing wireless technology of broadband born after 3G, and has framework with bandwidth up to 75M and the whole IP. It can be simple and high-efficient to access to Internet, and there is very powerful competitiveness in the wireless network transmission technology of the next generation. Wireless network have the problem of high error rate, badly channel dependability and transmit environment change unfavorable soon, etc. How to solve these problems fast and effectively? It is the key to guaranteeing transmitting quality. In 802.16 serial protocols, MAC (Medium Access Control) play a decisive role as an only software platform combined closely with transmission technology of physics, to guarantee the wireless network to transmit the stability and efficiency.
On the basis of abundant researching 802.16e protocol, The main innovation of the thesis is as follows:
1. Provide solution of entry network. The difficult point of entry has been analyzed. Combine the real hardware environment and design the effective implementation method. In case of using few memory, it can support up to 512 users to network and run steadily;
2. Has studied the high-performance algorithm of handover. The algorithm of handover reaches WiMAX designing requirement, and supports user move fast. It resolves the problem that user lost signal in tradition algorithm.
3. MAC control platform have a lot Advantages such as good adaptive capacity, high performance, run steadily and so on. It has already been applied to prototype system of ICT broadband mobile communication base station and terminal now.
WiMAX作为3G诞生之后新兴的宽带无线技术,拥有高达75M带宽和全IP的网络架构,可以简单高效的与现有Internet网络进行无缝结合,在下一代无线网络传输技术中有着非常强劲的竞争力。无线网络传输与有线网络比较起来,具有误码率高、信道可靠性差和传输环境变化快等不利因素,如何快速有效的解决这些传输难题,是保证和提高无线网络传输质量的关键。在802.16系列协议中,MAC作为唯一与物理层传输技术紧密结合的软件控制平台,对保证无线网络传输信道的稳定和效率,起着决定性的作用。
在充分研究协议的基础上,论文在创新方面,归纳如下:
1.给出了802.16e协议的入网控制算法解决方案。论文对算法的难点进行了分析,并结合实际硬件环境设计出了有效的实现方法。在使用很少内存的情况下,可以支持多达512个用户稳定入网运行;
2.在充分研究了现有的切换技术基础上,开发出了高性能的移动切换算法。论文设计的切换算法完全达到WiMAX系统设计要求,支持在快速移动情况下切换的可靠性和稳定性,很好的解决了传统切换算法中存在的用户掉话问题;
3.完成的MAC平台具有高可移植性、高性能、运行稳定等等优点,可以支持linux和vxWorks等多种操作系统,这些成果现在已经应用到中科院计算所研制开发的宽带移动通信基站和终端原型系统上。
IEEE 802.16 standard called Air Interface for WirelessMAN standard is supported by WIMAX forum. It applies to the range of WMAN (Wireless Metropolitan Area Network) mainly. This thesis has studied 802.16e standard, to design a high-efficient software platform that has a high adaptive capacity and high performance.
IEEE 802.16 is the new developing wireless technology of broadband born after 3G, and has framework with bandwidth up to 75M and the whole IP. It can be simple and high-efficient to access to Internet, and there is very powerful competitiveness in the wireless network transmission technology of the next generation. Wireless network have the problem of high error rate, badly channel dependability and transmit environment change unfavorable soon, etc. How to solve these problems fast and effectively? It is the key to guaranteeing transmitting quality. In 802.16 serial protocols, MAC (Medium Access Control) play a decisive role as an only software platform combined closely with transmission technology of physics, to guarantee the wireless network to transmit the stability and efficiency.
On the basis of abundant researching 802.16e protocol, The main innovation of the thesis is as follows:
1. Provide solution of entry network. The difficult point of entry has been analyzed. Combine the real hardware environment and design the effective implementation method. In case of using few memory, it can support up to 512 users to network and run steadily;
2. Has studied the high-performance algorithm of handover. The algorithm of handover reaches WiMAX designing requirement, and supports user move fast. It resolves the problem that user lost signal in tradition algorithm.
3. MAC control platform have a lot Advantages such as good adaptive capacity, high performance, run steadily and so on. It has already been applied to prototype system of ICT broadband mobile communication base station and terminal now.
引文
[1]唐雄燕.宽带无线接入技术及应用.北京:电子工业出版社,2006.5:50-250
[2]吴彦文.固定宽带无线接入技术.北京:北京邮电大学出版社,2003.08:20-100
[3]Eugne Crozier,et al."WiMAX's technology for LOS and NLOS environment".White Paper of the WiMAX forum
[4]IEEE 802.16 Working Group.IEEE STD 802.16-2004."Air Interface for Fixed and Mobile Broadband Wireless Access Systems".IETE 2004.10:1-780
[5]IEEE 802.16 Working Group.IEEE STD 802.16e-2005."Air Interface for Fixed and Mobile Broadband Wireless Access Systems".IETE 2006.2:1-770
[6]陈静,张鹏,周正.IEEE 802.16协议物理层规范.电信工程技术与标准化,2004.3:12-16[7]王文博,郑侃.宽带无线通信OFDM技术(第二版).北京.人民邮电出版社,2007.08:10-200
[8]郭剑兰.WiMAX自适应编码调制设计与实现:[硕士学位论文].杭州:浙江大学,2006:10-30
[9]G.J.Foschini,M.J.Gans."On Limits of Wireless Communications in Fading Environment when Using Multiple Antennas".Wireless Personal Communications,1998(6):311-314
[10]Yanling Yao,Sun J.Study of UGS grant synchronization for 802.16.ISCE 2005.2005.06:105 - 110
[11]Yanling Yao,Sun J.Study of UGS grant synchronization for 802.16.ISCE 2005.2005.06:105 - 110
[12]IEEE 802.16 Working Group.IEEE STD 802.16f-2005."Air Interface for Fixed Broadband Wireless Access Systems- Amendment 1:Management Information Base".IETF,2005.12:1-230
[13]孙天泽,袁文菊登.嵌入式设计与Linux驱动开发指南--基于ARM9处理器.北京:电子工业出版社,2007.1:1-450
[14]EEE 802.16 Working Group.IEEE P802.16g/D8."Air Interface for Fixed and Mobile Broadband Wireless Access Systems Amendment 3:Management Plane Procedures and Services".IETF,2007.2:1 - 160
[15]侯春雨.线接入网用户站接入过程研究与实现:[硕士学位论文].广州:暨南大学,2005:20-45
[16]IETF RFC 2132,Dynamic Host Configuration Protocol
[17]IETF RFC 2349,TFTP Timeout Interval and Transfer Size Options
[18]张兆丰,韦岗.用于移动Internet随机接入的一种新方式.通信学报.2003,4:9-16
[19]凌永发,高飞.改进的截断二进制指数后退冲突分解算法.计算机应用.2004,3:13-16
[20]许田,叶家骏.适用于HFC网络的碰撞解决算法.电视技术.2000,10:18-20
[21]Sik Choi,Gyung-ho Hwang,Taesoo Kwon."Fast Handover Scheme for Real-time Downlink Services in IEEE 802.16e BWA Systems".IEEE VTC'05.Vol.3:2028-2032
[22]Honman B,Benjapolakul W."A handover decision procedure for mobile telephone systems using fuzzy logic".IEEE APCCAS'98.53-506
[23]Ken-Ichi Itoh,Soiehi Watanabe,Jen-Shew Shin,Takuro Sato."Performance of Handover Algorithm Based on Distance and RSSI Measurements".IEEE Transactions on Vehicular technology.Vol.51,Issue 6 2002:1460-1468
[24]Hsin-Piao Lin,Rong-Terng Juang,Ding-Bing Lin."Validation of an Improved Location-Based Handover Algorithm Using GSM Measurement Data".IEEE Transactions on Mobile Computing.Vol.4 Issue 5 2005:530-536
[25]S S Wang,Marilynn Green,Maged Malkawi."Adaptive handoff method using mobile location information".IEEE ETSBC'01:97-101
[26]Zainab R.Zaidi,Brian L.Mark."A mobility-aware Handoff Trigger Scheme for Seamless Connectivity in Cellular Networks",IEEE VTC'04.Vol.5:3471-3475
[27]PicoChip Designs Limited.Wireless Communications System Solutions[EB/OL].http://www.pieoehip.com/downloads/93f34799a354edd3982476a3dc3e7f86/PC6530_Product _Brief.pdf,2006.2
[28]毛德操,胡希明.Linux内核源代码情景分析.杭州:浙江大学出版社,2001.05:1-150
[29]WiMAX Forum."Mobile Protocol Implementation Conformance Statement(PICS)Proforma".2006.9
[30]WiMAX Forum."TSS/TP(test purposes) for Interoperability Testing of Mobile WiMAX Certification of Wave 1 - MTG".2006.12
[2]吴彦文.固定宽带无线接入技术.北京:北京邮电大学出版社,2003.08:20-100
[3]Eugne Crozier,et al."WiMAX's technology for LOS and NLOS environment".White Paper of the WiMAX forum
[4]IEEE 802.16 Working Group.IEEE STD 802.16-2004."Air Interface for Fixed and Mobile Broadband Wireless Access Systems".IETE 2004.10:1-780
[5]IEEE 802.16 Working Group.IEEE STD 802.16e-2005."Air Interface for Fixed and Mobile Broadband Wireless Access Systems".IETE 2006.2:1-770
[6]陈静,张鹏,周正.IEEE 802.16协议物理层规范.电信工程技术与标准化,2004.3:12-16[7]王文博,郑侃.宽带无线通信OFDM技术(第二版).北京.人民邮电出版社,2007.08:10-200
[8]郭剑兰.WiMAX自适应编码调制设计与实现:[硕士学位论文].杭州:浙江大学,2006:10-30
[9]G.J.Foschini,M.J.Gans."On Limits of Wireless Communications in Fading Environment when Using Multiple Antennas".Wireless Personal Communications,1998(6):311-314
[10]Yanling Yao,Sun J.Study of UGS grant synchronization for 802.16.ISCE 2005.2005.06:105 - 110
[11]Yanling Yao,Sun J.Study of UGS grant synchronization for 802.16.ISCE 2005.2005.06:105 - 110
[12]IEEE 802.16 Working Group.IEEE STD 802.16f-2005."Air Interface for Fixed Broadband Wireless Access Systems- Amendment 1:Management Information Base".IETF,2005.12:1-230
[13]孙天泽,袁文菊登.嵌入式设计与Linux驱动开发指南--基于ARM9处理器.北京:电子工业出版社,2007.1:1-450
[14]EEE 802.16 Working Group.IEEE P802.16g/D8."Air Interface for Fixed and Mobile Broadband Wireless Access Systems Amendment 3:Management Plane Procedures and Services".IETF,2007.2:1 - 160
[15]侯春雨.线接入网用户站接入过程研究与实现:[硕士学位论文].广州:暨南大学,2005:20-45
[16]IETF RFC 2132,Dynamic Host Configuration Protocol
[17]IETF RFC 2349,TFTP Timeout Interval and Transfer Size Options
[18]张兆丰,韦岗.用于移动Internet随机接入的一种新方式.通信学报.2003,4:9-16
[19]凌永发,高飞.改进的截断二进制指数后退冲突分解算法.计算机应用.2004,3:13-16
[20]许田,叶家骏.适用于HFC网络的碰撞解决算法.电视技术.2000,10:18-20
[21]Sik Choi,Gyung-ho Hwang,Taesoo Kwon."Fast Handover Scheme for Real-time Downlink Services in IEEE 802.16e BWA Systems".IEEE VTC'05.Vol.3:2028-2032
[22]Honman B,Benjapolakul W."A handover decision procedure for mobile telephone systems using fuzzy logic".IEEE APCCAS'98.53-506
[23]Ken-Ichi Itoh,Soiehi Watanabe,Jen-Shew Shin,Takuro Sato."Performance of Handover Algorithm Based on Distance and RSSI Measurements".IEEE Transactions on Vehicular technology.Vol.51,Issue 6 2002:1460-1468
[24]Hsin-Piao Lin,Rong-Terng Juang,Ding-Bing Lin."Validation of an Improved Location-Based Handover Algorithm Using GSM Measurement Data".IEEE Transactions on Mobile Computing.Vol.4 Issue 5 2005:530-536
[25]S S Wang,Marilynn Green,Maged Malkawi."Adaptive handoff method using mobile location information".IEEE ETSBC'01:97-101
[26]Zainab R.Zaidi,Brian L.Mark."A mobility-aware Handoff Trigger Scheme for Seamless Connectivity in Cellular Networks",IEEE VTC'04.Vol.5:3471-3475
[27]PicoChip Designs Limited.Wireless Communications System Solutions[EB/OL].http://www.pieoehip.com/downloads/93f34799a354edd3982476a3dc3e7f86/PC6530_Product _Brief.pdf,2006.2
[28]毛德操,胡希明.Linux内核源代码情景分析.杭州:浙江大学出版社,2001.05:1-150
[29]WiMAX Forum."Mobile Protocol Implementation Conformance Statement(PICS)Proforma".2006.9
[30]WiMAX Forum."TSS/TP(test purposes) for Interoperability Testing of Mobile WiMAX Certification of Wave 1 - MTG".2006.12