| 摘要: |
| 无线重编程适用于各种应用场景下对传感器节点进行灵活的配置和升级.考虑到无线重编程会带来很大的通信开销和更新开销,提出了一种新的轻量级无线编程方法——EasiLWR.它通过函数级差异对比,计算新老代码中存在的差异代码.在无线传输时,仅传输差异代码,大幅减少了需要传输的代码量,有效降低了通信开销.它利用代码转移将部分需要频繁升级的代码存储在RAM中并加以执行,当进行重编程时,只需要对RAM进行写操作.从而避免了对Flash的写操作,缩短了更新时间,有效降低了更新开销.实验结果表明,与现有无线重编程方法相比,EasiLWR在降低通信开销及更新开销方面优势显著. |
| 关键词: 传感器网络 无线重编程 函数级差异代码 代码转移 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金(61003293);国家科技重大专项(2010ZX03006-003-02);中国科学院计算技术研究所知识创新项目(20106030) |
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| EasiLWR:A Lightweight Wireless Reprogramming Approach for Sensor Network |
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QIU Jie-Fan1,2, LI Dong1, SHI Hai-Long1,2, CUI Li1
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1.Institute of Computing Technology, The Chinese Academy of Sciences, Beijing 100190, China;2.Graduate University, The Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| Wireless reprogramming approach of sensor node is a requirement for flexible configuration and update. Considering the communication overhead and the program overhead,this paper presents a novel lightweight wireless reprogramming approach–EasiLWR with the following merits.By comparing the functions of the new program and the old program,the different codes between functions are transferred instead of entire codes.The communication overhead is reduced.Moreover,using the code shift,the parts of program,which need frequently update are stored and implemented in RAM rather than in the internal Flash of microcontroller unit(MCU).This translates to a reduced programming time.The experimental results show the outperformance of EasiLWR. |
| Key words: sensor network wireless reprogramming difference code of function code shift |
