Physical sidelink control channel transmission for sidelink inter-user equipment resource allocation

An apparatus, comprising:

• at least one processor;
• and
• at least one memory comprising computer program code,
• the at least one memory and computer program code are configured, with the at least one processor, to cause the apparatus at least to:
• receive, based on a decision of a user equipment, a resource allocation from the user equipment;
• receive from the user equipment, a notification of a determination of whether to transmit, from the user equipment, a sidelink control information associated to a transmission using the resource allocation over a control channel;
• and
• receive the transmission of the sidelink control information over the control channel using the resource allocation,
• wherein the transmission of the sidelink control information comprises an indicator which indicates whether the control channel is transmitted by the user equipment or by the apparatus, and which triggers the user equipment or the apparatus to measure a channel busy ratio of other user equipment in proximity to the user equipment or the apparatus.

An apparatus, comprising:

• at least one processor;
• and
• at least one memory comprising computer program code,
• the at least one memory and computer program code are configured, with the at least one processor, to cause the apparatus at least to:
• receive, based on a decision of a user equipment, a resource allocation from the user equipment;
• receive from the user equipment, a notification of a determination of whether to transmit, from the user equipment, a sidelink control information associated to a transmission using the resource allocation over a control channel;
• and
• receive the transmission of the sidelink control information over the control channel using the resource allocation,
• wherein when the apparatus is informed or determines not to transmit the sidelink control information over the control channel for an associated second channel using the resource allocation, the apparatus is further caused to listen to the sidelink control information from other sidelink user equipment in proximity to detect possible second channel resource collision.

An apparatus, comprising:

• at least one processor;
• and
• at least one memory comprising computer program code,
• the at least one memory and computer program code are configured, with the at least one processor, to cause the apparatus at least to
• allocate resources to a user equipment;
• determine whether a first sidelink control information for a transmission of the user equipment using the allocated resources is to be transmitted on a first control channel;
• and
• transmit, to the user equipment, the first sidelink control information over the control channel using the allocated resources;
• and
• receive, from the user equipment, the transmission using the allocated resources on a second control channel,
• wherein the transmission of the first sidelink control information comprises an indicator which indicates whether the first control channel is transmitted by the apparatus or by the user equipment, and which triggers the apparatus or the user equipment to measure a channel busy ratio of other user equipment in proximity to the apparatus or the user equipment.