그림 1. 직교수직좌표계 Fig. 1. Rectangular coordinate system.
그림 2. 좌표결정의 원리 Fig. 2. the principle of coordinate determination.
그림 3. 제안한 알고리즘의 순서도 Fig. 3. the flowchart of the proposed algorithm.
그림 4. 결합 트래버스의 계산 Fig. 4. the computation of a coupled traverse.
그림 5. 기지국 수에 따른 이동 단말 별 위치 오차 Fig. 5. the location error of mobile node by base station number.
그림 6. 단말 수에 따른 속도 별 위치 오차 Fig. 6. the position error by speed according to number of mobile nodes.
참고문헌
- MSIP, Republic of Korea, Request on prioritization and expeditious completion of 3GPP Work Items and Study Items related to Public Safety LTE, 3GPP RP-141097, Sept. 2014.
- MarketsandMarkets, Wireless broadband in public safety (2010-2015), June 2011.
- ETSI EN 300 396-2, Terrestrial trunked radio; Technical requirements for direct mode operation; Part 2: Radio aspects," 2007.
- TTA, 3GPP work items for public safety LTE and PPDR broadband network in Korea, 3GPP RP-141098, Sept. 2014.
- ETSI TR 102 485, "Electromagnetic compatibility and Radio spectrum Matters (ERM); Technical characteristics for Broadband Disaster Relief applications (BB-DR) for emergency services in disaster situations; System Reference Document," 2006.
- Y.S. Uddin, D.M. Nicol, and T.F. Abdelzaher, "A post-disaster mobility model for delay tolerant networking," in Simulation Conference (WSC), Proceedings of the 2009 Winter, Austin: TX, pp.2785-2796, 2009.