Pseudo-Random ALOHA for Enhanced Collision-Recovery in RFID
Pseudo-Random ALOHA for Enhanced Collision-Recovery in RFID
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DOI：
10.1109/lcomm.2013.011513.122109
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发表时间：
2012-09
期刊：
影响因子：
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通讯作者：
F. Ricciato;P. Castiglione
中科院分区：
文献类型：
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作者：
F. Ricciato;P. Castiglione
在这封信中，我们激励需要重新审视第二代RFID系统中使用的MAC协议，以利用接收器结构与碰撞恢复功能在物理层。为此，我们提出了一个简单的变帧时隙ALOHA时隙选择是不随机的，在经典的计划，而是确定性计算的伪随机函数的消息被发送和帧索引。确定性时隙选择使得能够在不改变传统RFID标准的PHY调制和编码格式的情况下实现帧间连续干扰消除（ISIC）。通过仿真，我们表明，ISIC可以带来20-25%的吞吐量增益相对于传统的时隙内SIC。
In this letter we motivate the need to revisit the MAC protocol used in Gen2 RFID system in order to leverage receiver structures with Collision Recovery capabilities at the PHY layer. To this end we propose a simple variant of the Framed Slotted-ALOHA where slot selection is not random, as in the classical scheme, but instead computed deterministically by a pseudo-random function of the message to be transmitted and the frame index. Deterministic slot selection enables Inter-frame Successive Interference Cancellation (ISIC) without changing the PHY modulation and coding format of legacy RFID standard. By means of simulations we show that ISIC can bring 20-25% gain in throughput with respect to traditional intra-slot SIC.