Telefonaktiebolaget Lm Ericsson (publ)

Markus Hanhisalo

Noamen Ben Henda

Vesa Lehtovirta

Prajwol Kumar Nakarmi

Shabnam Sultana

Zhang Fu

Helena Vahidi Mazinani

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.

Privacy protection for sidelink communications

A method performed by a network equipment of a communication network to dynamically provide trust information to a communication device registered or being registered to the communication network is provided. The method includes determining a trust information for each of one or more access networks. The trust information indicates whether each of the one or more access networks is trusted. The method further includes indicating to the communication device whether the one or more access networks is trusted for a current session or a later session. A method performed by a communication device registered or being registered with a communication network to dynamically receive trust information is also provided. The method includes receiving a message including a protected trust information list from a network equipment. The method further includes verifying the protection of the message. The method further includes storing the protected trust information list.

Methods for trust information in communication network and related communication equipment and communication device

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ESPOO, Finland

Markus Hanhisalo