Scanning optimization in 5g nr multi-rat environments
AssigneeApple Inc.
InventorsRohit R. Matolia, Alosious Pradeep Prabhakar, Vijay Venkataraman
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Abstract
Systems and methods are provided to improve candidate search and measurement in non-standalone (NSA) and standalone (SA) 5G new radio (NR) multi-radio access technology (RAT) environments. For Evolved Universal Terrestrial Radio Access Network (E-UTRAN) NR-dual connectivity (EN-DC), a user equipment (UE) skips 5G band measurements for an initial search or an out-of-service (OOS) search. For SA dual connectivity, the UE avoids 5G remaining band (RBS) scans and limits 5G deviated band search (DBS) scans to bands configured for the carrier.
Claims20
An apparatus for a user equipment (UE), the apparatus comprising:
- a memory interface to store system information in a memory device;
- and
- a processor configured to:
- determine, from the system information, whether a carrier supports a standalone (SA) operation of a first RAT or a non-standalone (NSA) operation of the first RAT in cooperation with a second RAT;
- for the NSA operation of the first RAT in cooperation with the second RAT, skip bands of the first RAT for an initial search or an out-of-service (00S) search;
- and
- for the SA operation of the first RAT:
- perform a storage list search (SLS), according to SLS search criteria, of recently used frequencies of at least the first RAT;
- in response to the SLS search criteria not being satisfied, perform a deviated band search (DBS), according to DBS search criteria, wherein for the first RAT the DBS is limited to configured bands of the carrier;
- and
- in response to the DBS search criteria not being satisfied, skip the bands of the first RAT in a remaining band search (RBS).
A method for user equipment (UE) to perform multi-radio access technology (RAT) searching in a cellular network, the method comprising:
- determining, from system information, whether a carrier of the cellular network supports a standalone (SA) operation of a first RAT or a non-standalone (NSA) operation of the first RAT in cooperation with a second RAT;
- for the NSA operation of the first RAT in cooperation with the second RAT, skipping bands of the first RAT for an initial search or an out-of-service (00S) search;
- and
- for the SA operation of the first RAT:
- performing a storage list search (SLS), according to SLS search criteria, of recently used frequencies of at least the first RAT;
- in response to the SLS search criteria not being satisfied, performing a deviated band search (DBS), according to DBS search criteria, wherein for the first RAT the DBS is limited to configured bands of the carrier;
- and
- in response to the DBS search criteria not being satisfied, skipping the bands of the first RAT in a remaining band search (RBS).
Dependencies are inferred from the claim text.