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:
Jul. 22, 2025
Filed:
Feb. 05, 2021
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
Zhang Fu, Stockholm, SE;
Markus Hanhisalo, Espoo, FI;
Shabnam Sultana, Montreal, CA;
Noamen Ben Henda, Vällingby, SE;
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm, SE;
Abstract
Security and privacy mechanisms are provided to protect the L2 identifiers used in groupcast communications over the sidelink (e.g., PC5 interface) without requiring a UE to periodically refresh the L2 identifiers, which may cause extra signaling overhead, increased latency and greater risk of synchronization issues. To prevent tracking of a UE, a group identifier (ID) is used as a source layer 2 (L2) ID in groupcast messages. Additionally, a message authentication code (MAC) is introduced into the group discovery procedure to authenticate the UE sending a group discovery request.