US 12,464,590 B2
Radio access technology switching based on network support
Sohrab Ahmad, Hyderabad (IN); Bhanu Kiran Janga, Hyderabad (IN); Osama Lotfallah, San Diego, CA (US); Abhishek Bhatnagar, San Diego, CA (US); and Quanling Zhang, Shanghai (CN)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Appl. No. 17/997,088
Filed by QUALCOMM INCORPORATED, San Diego, CA (US)
PCT Filed Jun. 21, 2020, PCT No. PCT/CN2020/097306
§ 371(c)(1), (2) Date Oct. 25, 2022,
PCT Pub. No. WO2021/258231, PCT Pub. Date Dec. 30, 2021.
Prior Publication US 2023/0189371 A1, Jun. 15, 2023
Int. Cl. H04W 76/18 (2018.01)
CPC H04W 76/18 (2018.02) 30 Claims
OG exemplary drawing
 
1. A method for wireless communication at a user equipment (UE) supporting a first radio access technology and a second radio access technology, comprising:
establishing a connection with a network device according to the first radio access technology;
transmitting, to a first network node via the connection associated with the first radio access technology, a first request associated with a bearer for a communication service, the first request comprising parameters associated with the second radio access technology;
receiving, from the first network node, a response indicating that the first request is rejected, the response comprising a rejection cause that is one of a set of preconfigured causes;
determining that the second radio access technology is unsupported by the first network node for communications with the UE based at least in part on the rejection cause being one of the set of preconfigured causes; and
transmitting, to the first network node based at least in part on the determining, a second request associated with the bearer for the communication service, the second request exclusive of the parameters associated with the second radio access technology.