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电子收费系统车载单元LLC子层研究
引用本文:张威,李跃辉,景为平. 电子收费系统车载单元LLC子层研究[J]. 计算机工程, 2011, 37(8): 246-248. DOI: 10.3969/j.issn.1000-3428.2011.08.086
作者姓名:张威  李跃辉  景为平
作者单位:南通大学江苏省专用集成电路设计重点实验室,江苏,南通,226019
基金项目:中华人民共和国交通运输部基金资助项目,江苏省交通厅基金资助项目,江苏省研究生创新工程基金资助项目
摘    要:采用通用微控制器实现电子收费(ETC)专用短程通信的逻辑链路控制(LLC)子层时存在功耗大、速度慢等缺点。针对该问题,通过研究ETC系统中车载单元LLC子层协议的工作原理,提出以专用逻辑电路实现LLC子层的功能,给出2种类型服务在该层的状态转换方式。利用Verilog HDL在FPGA上实现该层的功能,结果证明了该方法的有效性。

关 键 词:电子收费  专用短程通信  逻辑链路控制  状态分析  FPGA实现  Verilog HDL语言

Study on LLC Sub-layer of On-board Unit in ETC System
ZHANG Wei,LI Yue-hui,JING Wei-ping. Study on LLC Sub-layer of On-board Unit in ETC System[J]. Computer Engineering, 2011, 37(8): 246-248. DOI: 10.3969/j.issn.1000-3428.2011.08.086
Authors:ZHANG Wei  LI Yue-hui  JING Wei-ping
Affiliation:(Jiangsu Province Key Laboratory of ASIC,Nantong University,Nantong 226019,China)
Abstract:There are some disadvantages of high power dissipation,low speed and so on when the general microcontroller is used to implement the Logical Link Control(LLC) sub-layer of Dedicated Short-Range Communication(DSRC) in Electronic Toll Collection(ETC) system.By analyzing working principle of LLC sub-layer protocol of on-board unit in ETC system,this paper proposes a LLC sub-layer protocol which is implemented by specific logical circuit.The state transition modes of two types of services are presented.The function of LLC sub-layer is realized in Verilog HDL,and FPGA experimental results show the effectiveness of the method.
Keywords:Electronic Toll Collection(ETC); Dedicated Short-Range Communication(DSRC); Logical Link Control(LLC); state analysis; implementation with FPGA; Verilog HDL;
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