Mechanisms for Reducing Collision in an Auto-ID-based Environment

• Main Authors: Ding-Wu Ho, 何丁武
• Other Authors: Chi-Chun Lo
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/20669034279543797410

碩士 === 國立交通大學 === 資訊管理研究所 === 92 === Auto-ID architecture proposed a new technology to identify products and goods embedded special designed tag, instead of conventional identification triggered by Bar Code. This new technology of identification practices RFID proposed standard coordinated with the distribution information structure. The anti-collision mechanism addressed in Auto-ID specification adopts a similar procedure of calling the roll. The inefficiency and higher collision probability will occur in the procedure of roll call when many products and goods must be identified. According above, the mechanisms proposed here must be developed to foster the efficiency of identification. The proposed anti-collision mechanisms, adapted CSMA/CA and combined BT scheme, try to boost the original anti-collision mechanism and reduce the inefficiency of identification. According to the simulation, adapted CSMA/CA mechanism is suitable when the amount of tag is not larger than 512; otherwise, combined BT scheme is more suitable than adapted CSMA/CA mechanism since adapted CSMA/CA would cause the identifying loss. Verified with the conclusion of simulation, the mechanisms proposed here can foster the efficiency of identification as anticipated.