University of Sussex
IEEE_TCOM_Bit Query.pdf (1.6 MB)

From M-ary Query to Bit Query: a new strategy for efficient large-scale RFID identification

Download (1.6 MB)
journal contribution
posted on 2023-06-09, 20:17 authored by Jian Su, Yongrui Chen, Zhengguo ShengZhengguo Sheng, Zhong Huang, Alex X Liu
The tag collision avoidance has been viewed as one of the most important research problems in RFID communications and bit tracking technology has been widely embedded in query tree (QT) based algorithms to tackle such challenge. Existing solutions show further opportunity to greatly improve the reading performance because collision queries and empty queries are not fully explored. In this paper, a bit query (BQ) strategy based Mary query tree protocol (BQMT) is presented, which can not only eliminate idle queries but also separate collided tags into many small subsets and make full use of the collided bits. To further optimize the reading performance, a modified dual prefixes matching (MDPM) mechanism is presented to allow multiple tags to respond in the same slot and thus significantly reduce the number of queries. Theoretical analysis and simulations are supplemented to validate the effectiveness of the proposed BQMT and MDPM, which outperform the existing QT-based algorithms. Also, the BQMT and MDPM can be combined to BQMDPM to improve the reading performance in system efficiency, total identification time, communication complexity and average energy cost.


Publication status

  • Published

File Version

  • Accepted version


IEEE Transactions on Communications




Institute of Electrical and Electronics Engineers

Page range


Department affiliated with

  • Engineering and Design Publications

Research groups affiliated with

  • Advanced Communications, Mobile Technology and IoT (ACMI) Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date


First Open Access (FOA) Date


First Compliant Deposit (FCD) Date


Usage metrics

    University of Sussex (Publications)


    No categories selected