CAJ | 학술논문

Ultra-Wideband(UWB)技术被认为是最适合进行室内无线定位的技术,IEEE802.15.4a给出的TW-TOA(Two Way Time of Arrival)测距协议中采用的是基于时间戳报文的接收-发送周转时延消除的方法,但是同类设备在相同的环境下其周转时延是相同的,所以为了减少测距双方的数据通信量,提出了一种基于固定周转时延的测距方法；为了提高Hello帧的可靠性提出了在初次定位以及在定位过程中当周转时延发生严重漂移的情况下发送基于停-等协议的Hello报文；同时给出了与IEEE802.15.4兼容的MAC子层协议的格式,并给出了Hello报文格式以及包含品质因子的测距应答帧格式。
Ultra-Wideband(UWB)기술피인위시최괄합진행실내무선정위적기술,IEEE802.15.4a급출적TW-TOA(Two Way Time of Arrival)측거협의중채용적시기우시간착보문적접수-발송주전시연소제적방법,단시동류설비재상동적배경하기주전시연시상동적,소이위료감소측거쌍방적수거통신량,제출료일충기우고정주전시연적측거방법；위료제고Hello정적가고성제출료재초차정위이급재정위과정중당주전시연발생엄중표이적정황하발송기우정-등협의적Hello보문；동시급출료여IEEE802.15.4겸용적MAC자층협의적격식,병급출료Hello보문격식이급포함품질인자적측거응답정격식。
Ultra-Wideband( UWB) technology is considered to be the most suitable for indoor wireless location. TW-TOA(Two Way Time of Arrival) Ranging protocol in IEEE802. 15. 4a is based on the reception of timestamp packets to eliminate the receive-send turnover delay. The turnover delay of the same kind of equipment in the same conditions is always the same,so the fixed turnover ranging method is proposed to reduce the ranging data traffic on both sides. In order to improve the reliability of the Hello frame, the protocol is put forward that Hello packets should be sent based on the stop-wait protocol in the initial positioning stage and when the turnover delay drifts seriously during the positioning. At last,the format of MAC sub-layer,compatible with IEEE802. 15. 4,Hello packet and the ranging response packet with the FoM( Figure of Merit) are given.