US 11,737,160 B2
Handling of PDCP during connection re-establishment
Oumer Teyeb, Solna (SE); and Gunnar Mildh, Sollentuna (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed on Jun. 16, 2021, as Appl. No. 17/349,013.
Application 17/349,013 is a continuation of application No. 16/331,633, granted, now 11,051,354, previously published as PCT/IB2018/058341, filed on Oct. 25, 2018.
Claims priority of provisional application 62/586,348, filed on Nov. 15, 2017.
Prior Publication US 2021/0345436 A1, Nov. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 76/19 (2018.01); H04W 12/10 (2021.01); H04W 76/10 (2018.01)
CPC H04W 76/19 (2018.02) [H04W 12/10 (2013.01); H04W 76/10 (2018.02)] 9 Claims
OG exemplary drawing
 
1. A method performed by a user equipment (UE), the method comprising:
establishing a connection to a Radio Access Network (RAN) via a first network node, wherein communications are provided over the connection using Signaling Radio Bearer 1 (SRB1) configured with a New Radio (NR) Packet Data Convergence Protocol (PDCP) configuration;
after the connection is suspended, receiving a Radio Resource Control (RRC) connection re-establishment message from a second network node, wherein the connection re-establishment message includes a radioResourceConfigDedicated information element (IE); and
re-establishing the connection to the RAN, the re-establishing comprising:
applying a Long-Term Evolution (LTE) PDCP configuration to SRB1;
performing a radio resource configuration procedure in accordance with the radioResourceConfigDedicated IE;
sending an RRC connection re-establishment complete message to the second network node; and
mapping at least one of an NR encryption algorithm or an NR integrity protection algorithm to an LTE algorithm.