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

Claim 8:
9. 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 wireless device comprising:
a receiver and a transmitter configured to communicate with the network node;
a processor circuit operatively coupled to the receiver and the transmitter; and
a memory operatively coupled to the processor circuit and storing program instructions for execution by the processor circuit, such that the processor circuit is configured to:
send a gap request to the network node for performing ProSe operation on a target cell of the non-serving carrier;
obtain:
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;

determine 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
apply 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,

wherein the duration of the gap of the first gap configuration and the second gap configuration is lesser than a ProSe transmission period, wherein the processor is further configured to:
obtain by determining whether the target cell on the non-serving carrier, on which the wireless device is to perform the ProSe operation, is known or unknown to the wireless device, and to:
determine a duration of a 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
determine a duration of a gap of a second gap configuration for the case that the target cell on the non-serving carrier is unknown to the wireless device, and wherein the wireless device is further configured to signal the determined durations to the network node.