Patent ID: 11889438
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A method performed in a wireless device for performing Proximity Services (ProSe) operation on a non-serving carrier, the wireless device being served by a network node on a cell on a serving carrier, the method comprising:
sending a gap request to a network node for performing ProSe operation on a target cell of the non-serving carrier;
obtaining:
a first gap configuration for a case that the target cell on the non-serving carrier is known to the wireless device, wherein the first gap configuration comprises a first gap of a first duration before the start of a Prose operation duration, wherein the ProSe operation duration includes transmission durations that correspond to subframes expected to be used for ProSe, and
a second gap configuration for a case that the target cell on the non-serving carrier is unknown to the wireless device, wherein the second gap configuration comprises a second gap of a second duration before start of the ProSe operation duration;

determining whether the target cell on the non-serving carrier is known or unknown to the wireless device based on the wireless device being synchronized to the target cell on the non-serving carrier by knowing a timing of the target cell and being able to receive radio signals from the target cell; and
applying one of the first gap configuration and the second gap configuration for
performing the ProSe operation on the target cell on the non-serving carrier, wherein the wireless device is not scheduled on the cell on the serving carrier during one of:
the duration of the gap of the first gap configuration for the case that the target cell on the non-serving carrier is known to the wireless device, and
the duration of the gap of the second gap configuration for the case that the target cell on the non-serving carrier is unknown to the wireless device, and wherein the duration of the gap of the first gap configuration and the second gap configuration is lesser than a ProSe transmission period.