WiFi의 간섭을 평가하기 위한 IEEE 802.15.4 채널분석기의 구현

다국어 초록 (Multilingual Abstract)

In this paper, an implementation of concurrent backoff delay process on a single chip with IEEE 802.15.4 hardware and 8051 processor core that can be used for analyzing the interference on IEEE 802.15.4 channels due to WiFi traffics is studied. The backoff delay process of IEEE 802.15.4 CSMA-CA algorithm is explained. The characteristics of random number generator, timer, and CCA register included in the single chip are described with their control procedure in order to implement the process. A concurrent backoff delay process to evaluate multiple IEEE 802.15.4 channels is proposed, and a method to service the associated tasks at sequentially ordered backoff delay events occurring on the channels is explained. For the implementation of the concurrent backoff delay process on a single chip IEEE 802.15.4 hardware, the elements for the single channel backoff delay process and their control procedure are used to be extended to multiple channels with little modification. The medium access delay on each channel, which is available after execution of the concurrent backoff delay process, is displayed on the LCD of an IEEE 802.15.4 channel analyzer. The experimental results show that we can easily identify the interference on IEEE 802.15.4 channels caused by WiFi traffics in comparison with the way displaying measured channel powers.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 단일 채널 IEEE 802.15.4 CSMA-CA 알고리즘의 구현
• 3. 다중 채널에 대한 병렬적인 백오프지연과정 구현
• 4. WiFi 간섭을 평가하기 위한 IEEE 802.15.4 채널분석기의 구현 및 시험
• 5. 결론
• References

참고문헌 (Reference)

1 G. Thonet, "ZigBee-WiFi Coexistence" Schneider Electric White Paper and Test Report 1-38, 2008

2 ZigBee Alliance, "ZigBee and Wireless Frequency Coexistence" ZigBee White Paper 2007

3 R. Zhou, "ZiFi : Wireless LAN Discovery via ZigBee Interference Signatures" 49-60, 2010

4 Texas Instrument, "Z-Stack User's Guide for SmartRF05EB and CC2530, Document Number :SWRU189 Ver. 1.6"

5 LAN MAN Standards Committee of the IEEE Computer Society, "Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low Rate Wireless Personal Area Networks (WPANs)"

6 J. Ansari, "WiSpot : Fast and Reliable Detection of Wi-Fi Networks using IEEE 802. 15. 4 Radios" 35-44, 2011

7 LAN MAN Standards Committee of the IEEE Computer Society, "Part 11 : Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)Specifications"

8 R. Xu, "MuZi :Multi-channel ZigBee Networks for Avoiding WiFi Interference" 323-329, 2011

9 HAL Drivers Application Programming Interface, "Document Number : SWRA193 Version 1.4"

10 P. Yi, "Developing ZigBeee Deployment Guideline Under WiFi Interference for Smart Grid Applications" 2 (2): 110-120, 2011

11 Texas Instrument, "CC253x System-on-Chip Solution for 2.4-GHz IEEE 802.15.4 and ZigBee Applications : User's Guide"