# US 10,485,000 B2 · User equipment, base stations and methods

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- Number: US 10,485,000 B2
- Document ID: US10485000B2
- Status: Granted
- Kind: B2
- Application number: 15/717,585
- Filed: 2017-09-27
- Published: 2018-03-29
- Granted: 2019-11-19
- Earliest claimed: 2016-09-28
- Assignees: Sharp Kabushiki Kaisha; FG Innovation Company Limited
- Applicants: Sharp Kabushiki Kaisha; FG Innovation Company Limited
- Inventors: Kamel M. Shaheen; Toshizo Nogami; Atsushi Ishii
- Web page: https://patentgrep.com/patent/US10485000B2

## CPC

- H04W 28/0958: {based on metrics or performance parameters}
- H04W 28/0252: {per individual bearer or channel (dynamic wireless traffic scheduling H04W72/12)}
- H04W 28/082: among bearers or channels
- H04W 36/0022: {for transferring data sessions between adjacent core network technologies}
- H04W 36/0094: {Definition of hand-off measurement parameters}
- H04W 36/144: {over a different radio air interface technology}
- H04W 36/1443: {between licensed networks}
- H04W 36/28: involving a plurality of connections, e.g. multi-call or multi-bearer connections
- H04W 72/51: based on terminal or device properties
- H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
- H04W 36/22: for handling the traffic
- H04W 76/27: Transitions between radio resource control [RRC] states
- H04W 76/30: Connection release
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A multi-mode capable LTE-5G new radio (NR) user equipment (UE) for receiving LTE radio resource connection (RRC) messages is described. The UE receives an LTE RRC message from an evolved node B (eNB). The UE also determines which data radio bearer (DRB) to offload to a particular 5G NR system. The UE establishes an RRC with the 5G NR system. The UE steers a particular DRB or DRBs to the 5G NR system. The UE acknowledges receiving the LTE RRC message using LTE or NR connections. The UE updates an LTE system with a status of connections to the 5G NR system.

## Claims

### Claim 1

A user equipment (UE), comprising:
a processor; and
a memory in electronic communication with the processor, wherein instructions stored in the memory are executable to:
receive an RRCConnectionReconfiguration message from an E-UTRA evolved node B (eNB), wherein the RRCConnectionReconfiguration message is received over an LTE air interface, the RRCConnectionReconfiguration message comprises information elements (IEs) indicating a new radio (NR) configuration information, and the NR configuration information indicates an identity of an NR-Signaling Radio Bearer (SRB) for NR RRC message;
perform, according to the NR configuration information, addition of the NR-SRB for NR RRC message over an NR air interface which is different from the LTE air interface;
send information indicating a failure type as NR Radio Link failure.

### Claim 2 (depends on 1)

The UE of claim 1, wherein the information indicating the failure type is sent to the E-UTRA eNB.

### Claim 3

A method performed by a user equipment (UE), comprising:
receiving an RRCConnectionReconfiguration message from an E-UTRA evolved node B (eNB), wherein the RRCConnectionReconfiguration message is received over an LTE air interface, the RRCConnectionReconfiguration message comprises information elements (IEs) indicating a new radio (NR) configuration information, and the NR configuration information indicates an identity of an NR-Signaling Radio Bearer (SRB) for NR RRC message;
performing, according to the NR configuration information, addition of the NR-SRB for NR RRC message over an NR air interface which is different from the LTE air interface; and
sending information indicating a failure type as NR Radio Link failure.

### Claim 4

An E-UTRA evolved node B (eNB), comprising:
a processor; and
a memory in electronic communication with the processor, wherein instructions stored in the memory are executable to:
send an RRCConnectionReconfiguration message to a user equipment (UE), wherein the RRCConnectionReconfiguration message is received over an LTE air interface of the UE, and the RRCConnectionReconfiguration message comprises information elements (IEs) indicating a new radio (NR) configuration information which indicates an identity of an NR-Signaling Radio Bearer (SRB) for NR RRC message and which is used to cause the UE to perform addition of the NR-SRB for NR RRC message over an NR air interface of the UE which is different from the LTE air interface; and
receive, from the UE, information indicating a failure type as NR Radio Link failure.

### Claim 5

A method performed by an E-UTRA evolved node B (eNB), comprising:
sending an RRCConnectionReconfiguration message to a user equipment (UE), wherein the RRCConnectionReconfiguration message is received over an LTE air interface of the UE, and the RRCConnectionReconfiguration message comprises information elements (IEs) indicating a new radio (NR) configuration information which indicates an identity of an NR-Signaling Radio Bearer (SRB) for NR RRC message and which is used to cause the UE to perform addition of the NR-SRB for NR RRC message over an NR air interface of the UE which is different from the LTE air interface; and
receiving, from the UE, information indicating a failure type as NR Radio Link failure.