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Prior work on anti-collision for Radio Frequency IDentification (RFID) systems usually schedule adjacent readers to exclusively interrogate tags for avoiding reader collisions. Although such a pattern can effectively deal with collisions, the lack of readers' collaboration wastes numerous times on the scheduling process and dramatically degrades the throughput of identification. Even worse, the tags within the overlapped interrogation regions of adjacent readers (termed as contentious tags), even if the number of such tags is very small, introduce a significant delay to the identification process. In this paper, the authors propose a new strategy for collision resolution. First, they shelve the collisions and identify the tags that do not involve reader collisions. Second, they perform a joint identification, in which adjacent readers collaboratively identify the contentious tags.
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