RFID中增强碰撞恢复的伪随机Aloha算法
Pseudo-random Aloha for Enhanced Collision-recovery in RFID
摘要：
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，我们建议考虑一个简单的变种的帧时隙Aloha与伪随机（确定性）插槽选择相反的经典随机选择。伪随机接入自然地允许实现帧间连续干扰消除（ISIC），而不改变传统RFID标准的PHY调制和编码格式。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帧内SIC。除此之外，我们阐述了利用伪随机接入协议结合先进的物理层技术的RFID应用的背景下的潜力。
英文摘要：
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 to consider a simple variant of the Framed Slotted Aloha with pseudo-random (deterministic) slot selection as opposite to the classical random selection. Pseudo-random access allows naturally to implement 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-frame SIC. Besides that, we elaborate on the potential of leveraging pseudo-random access protocols in combination with advanced PHY techniques in the context of RFID applications.
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