Telefonaktiebolaget LM Ericsson (publ)
Traffic Steering Between LTE and NR

Abstract:

System comprising a mobility management entity, MME (103), a first Radio Access node, RAN (102, eNB) offering Long Term Evolution, LTE, access, and a second radio access node, RAN (108, gNB) offering New Radio, NR, access; a user entity, UE (101), supporting both Long Term Evolution, LTE, and New Radio, NR, Radio Access Technology, RAT. The MME (103) is resolving (74) a Radio Access Technology restriction information, RAT RI, from the at least two instances of RAT RI pertaining to restrictions for a UE as to support dual connectivity over LTE access and NR access respectively for a Packet Data Network, PDN, connectivity session. The first RAN (102) is receiving (75) the resolved RAT RI and is enforcing (77) bearer setup in accordance with the resolved RAT RI.