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US 11,115,890 B2Granted
Method and apparatus for triggering transmission carrier reselection procedure due to high congestion level in wireless communication system
AssigneeLG Electronics Inc.
InventorsYoungdae Lee, Taehun Kim, Jongwoo Hong
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Abstract
A method and apparatus for triggering a transmission carrier reselection procedure due to high congestion level in a wireless communication system is provided. A wireless device, which selects a carrier and performs data transmission on the carrier, determines that a congestion level of the carrier is not below a threshold for carrier reselection, and triggers the carrier reselection.
Claims9
A method performed by a wireless device in a wireless communication system, the method comprising:
- selecting a first carrier;
- allocating a sidelink resource on the first carrier for a first sidelink logical channel;
- measuring a channel busy ratio (CBR) value for the first carrier;
- obtaining (i) a first CBR threshold for carrier reselection and (ii) a second CBR threshold for keeping the first carrier, based on a priority of the first sidelink logical channel, wherein the first CBR threshold and the second CBR threshold are related to the priority of the first sidelink logical channel;
- determining that (i) the CBR value for the first carrier is higher than or equal to the first CBR threshold and (ii) the CBR value for the first carrier is higher than or equal to the second CBR threshold;
- constructing a media access control (MAC) protocol data unit (PDU) to be transmitted with the sidelink resource on the first carrier, wherein the MAC PDU includes first data from the first sidelink logical channel before the determination, while the MAC PDU does not include second data from the first sidelink logical channel after the determination;
- and
- transmitting the MAC PDU based on the sidelink resource on the first carrier.
5 more elements
A wireless device in a wireless communication system, the wireless device comprising:
- a memory;
- a transceiver;
- and
- a processor, operably coupled to the memory and the transceiver, and configured to:
- select a first carrier,
- allocate a sidelink resource on the first carrier for a first sidelink logical channel;
- measure a channel busy ratio (CBR) value for the first carrier;
- obtain (i) a first CBR threshold for carrier reselection and (ii) a second CBR threshold for keeping the first carrier, based on a priority of the first sidelink logical channel, wherein the first CBR threshold and the second CBR threshold are related to the priority of the first sidelink logical channel;
- determine that (i) the CBR value for the first carrier is higher than or equal to the first CBR threshold and (ii) the CBR value for the first carrier is higher than or equal to the second CBR threshold;
- construct a media access control (MAC) protocol data unit (PDU) to be transmitted with the sidelink resource on the first carrier, wherein the MAC PDU includes first data from the first sidelink logical channel before the determination, while the MAC PDU does not include second data from the first sidelink logical channel after the determination;
- and
- control the transceiver to transmit the MAC PDU based on the sidelink resource on the first carrier.
9 more elements
Dependencies are inferred from the claim text.