The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2020
Filed:
Mar. 04, 2016
Origin Wireless, Inc., Boston, MA (US);
Hang Ma, Greenbelt, MD (US);
Yan Chen, ChengDu, CN;
Feng Han, San Diego, CA (US);
Zhung-Han Wu, Silver Spring, MD (US);
Zoltan Safar, Ellicott City, MD (US);
K. J. Ray Liu, Potomac, MD (US);
Origin Wireless, Inc., Greenbelt, MD (US);
Abstract
The predicted explosive growth in the number of wireless devices and mobile applications utilizing wireless networks makes it time for engineers to face the high network densification challenge where massive numbers of terminal devices (TDs) coexist and require both high-rate and low-latency wireless data transmissions. We describe a multiple access point (AP) Time-Reversal Division Multiple Access (TRDMA) downlink system that utilizes the natural spatial and temporal focusing properties of Time Reversal (TR) based communications, where the interference to unintended receivers is automatically at least partially mitigated. As a result, in some implementations, the TRDMA system can achieve full or nearly-full spectrum reuse without any coordination among APs. The performance of the TRDMA system is investigated in both an open access model where an AP is open to all the TDs and a closed access model where an AP is only open to specific TDs. It is shown that in the open access model, the TRDMA system can be easily extended by adding more APs to fit various scenarios. In the closed access model, the TRDMA system is failure-robust such that the performance degradation caused by neighboring APs is graceful. Moreover, the packet delay of the TRDMA system can be much lower than that of the IEEE 802.11 based system.