ASAP: A MAC Protocol for Dense and Time-Constrained RFID Systems
ASAP: A MAC Protocol for Dense and Time-Constrained RFID Systems
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DOI：
10.1109/icc.2006.255711
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发表时间：
2006-12
影响因子：
2.6
通讯作者：
Girish Khandelwal;Kyounghwan Lee;A. Yener;S. Serbetli
中科院分区：
文献类型：
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作者：
Girish Khandelwal;Kyounghwan Lee;A. Yener;S. Serbetli
提出了一种新的用于射频识别(RFID)系统的媒体访问控制(MAC)协议，该协议利用了在阅读器处收集的统计信息。该协议被称为自适应时隙ALOHA协议(ASAP)，其动机是需要显著改善当前建议的用于RFID系统的MAC协议的总读取时间性能。为了完成这项任务，ASAP估计动态标签数量，并在下一轮中通过一个简单的策略来调整帧大小，该策略最大化了适当定义的效率函数。我们证明，与当前的RFID MAC协议相比，ASAP在总读取时间性能方面有显著的改进。接下来，我们将扩展设计以在现实场景中实现可靠的ASAP性能，例如存在对帧大小的限制，以及标签在读取器场中以恒定速度移动的移动RFID系统。我们还考虑了标签可能由于物理故障或临时故障而无法响应的情况，并在这些场景中展示了健壮性。
We introduce a novel medium access control (MAC) protocol for radio frequency identification (RFID) systems which exploits the statistical information collected at the reader. The protocol, termed adaptive slotted ALOHA protocol (ASAP), is motivated by the need to significantly improve the total read time performance of the currently suggested MAC protocols for RFID systems. In order to accomplish this task, ASAP estimates the dynamic tag population and adapts the frame size in the subsequent round via a simple policy that maximizes an appropriately defined efficiency function. We demonstrate that ASAP provides significant improvement in total read time performance over the current RFID MAC protocols. We next extend the design to accomplish reliable performance of ASAP in realistic scenarios such as the existence of constraints on frame size, and mobile RFID systems where tags move at constant velocity in the reader's field. We also consider the case where tags may fail to respond because of a physical breakdown or a temporary malfunction, and show the robustness in those scenarios as well.