US 11,991,763 B2
Sidelink connection request based on congestion level
Youngdae Lee, Seoul (KR); Taehun Kim, Seoul (KR); and Jongwoo Hong, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/295,358
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jan. 17, 2020, PCT No. PCT/KR2020/000849
§ 371(c)(1), (2) Date May 19, 2021,
PCT Pub. No. WO2020/153667, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 10-2019-0007818 (KR), filed on Jan. 22, 2019; application No. 10-2019-0007819 (KR), filed on Jan. 22, 2019; and application No. 10-2019-0007911 (KR), filed on Jan. 22, 2019.
Prior Publication US 2022/0015166 A1, Jan. 13, 2022
Int. Cl. H04W 76/14 (2018.01); H04W 72/0453 (2023.01); H04W 72/52 (2023.01); H04W 92/18 (2009.01)
CPC H04W 76/14 (2018.02) [H04W 72/0453 (2013.01); H04W 72/52 (2023.01); H04W 92/18 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for a first wireless device in a wireless communication system, the method comprising:
receiving, from a radio access network (RAN) node, system information including a sidelink configuration via a Broadcast Control Channel (BCCH),
wherein the sidelink configuration includes information on resource pools which are used for several wireless devices to perform sidelink transmissions;
selecting one or more carriers from the resource pools;
determining a congestion level of the one or more carriers based on Channel Busy Ratio (CBR) measurements on the one or more carriers;
triggering a connection establishment procedure for a PC5 connection between the first wireless device and a second wireless device for a specific service, wherein the connection establishment procedure is mapped to the one or more carriers;
selecting a first carrier having a lowest congestion level from the one or more carriers for the specific service;
allocating a sidelink grant for the first carrier for the specific service;
transmitting, to the second wireless device, a connection request message in the connection establishment procedure on the first carrier based on the allocated sidelink grant, wherein the connection request message includes information for the first carrier;
monitoring the one or more carriers mapped to the connection establishment procedure;
receiving, from the second wireless device, a connection response message in response to the connection request message on a second carrier, where the second carrier is a carrier among the one or more carriers mapped to the connection establishment procedure; and
performing carrier reselection upon receiving the connection response message on the second carrier in response to the connection request message.