Title:
FREQUENCY-SPECTRUM DYNAMIC CONTROL METHOD AND SYSTEM OF OFDMA BACKSCATTER NETWORK
Document Type and Number:
WIPO Patent Application WO/2021/213553
Kind Code:
A3
Abstract:
The present invention provides a frequency-spectrum dynamic control method and system of an orthogonal frequency-division multiple access (OFDMA) backscatter network, comprising: step 1: a central control node obtaining network spectrum occupancy information, and reading the number of active nodes in the spectrum and the current total number of sub-channels; step 2: the central control node encoding the total number of sub-channels, and broadcasting the wireless channel after modulation; step 3: a backscatter tag decoding the broadcast modulated wireless channel by means of a demodulation circuit to obtain the total number of new sub-channels, and, taking the total number of sub-channels as a parameter, controlling the symbol rate in the backscatter communication process. The present invention solves the spectrum waste of a large-capacity OFDMA backscatter network in a situation where there is a small amount of equipment; can also be used to adjust the data rate of the network, and, in the case of poor network SNR, can improve the reliability of communication by means of reducing the symbol rate or increasing the symbol length.
Inventors:
ZHU FENGYUAN (CN)
FENG YUDA (CN)
LI QIANRU (CN)
TIAN XIAOHUA (CN)
WANG XINBING (CN)
FENG YUDA (CN)
LI QIANRU (CN)
TIAN XIAOHUA (CN)
WANG XINBING (CN)
Application Number:
PCT/CN2021/100810
Publication Date:
December 16, 2021
Filing Date:
June 18, 2021
Export Citation:
Assignee:
UNIV SHANGHAI JIAOTONG (CN)
International Classes:
H04W16/10; H04L27/26
Domestic Patent References:
| WO2015149513A1 | 2015-10-08 |
Foreign References:
| CN111565393A | 2020-08-21 | |||
| CN109412992A | 2019-03-01 |
Other References:
YIN JIECHEN: "Research on Broadband OFDMA Random Access Technology", CHINESE DOCTORAL DISSERTATIONS FULL-TEXT DATABASE, 25 March 2016 (2016-03-25), pages 1 - 160, XP055878069
RENJIE ZHAO;FENGYUAN ZHU;YUDA FENG;SIYUAN PENG;XIAOHUA TIAN;HUI YU;XINBING WANG: "OFDMA-Enabled Wi-Fi Backscatter", MOBILE COMPUTING AND NETWORKING, 5 August 2019 (2019-08-05), pages 1 - 15, XP058475433, ISBN: 978-1-4503-6169-9, DOI: 10.1145/3300061.3300121
RENJIE ZHAO;FENGYUAN ZHU;YUDA FENG;SIYUAN PENG;XIAOHUA TIAN;HUI YU;XINBING WANG: "OFDMA-Enabled Wi-Fi Backscatter", MOBILE COMPUTING AND NETWORKING, 5 August 2019 (2019-08-05), pages 1 - 15, XP058475433, ISBN: 978-1-4503-6169-9, DOI: 10.1145/3300061.3300121
Attorney, Agent or Firm:
DUAN&DUAN LAW FIRM (CN)
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