US 11,310,855 B2Granted

Methods and systems for managing bearer configuration of user equipment with EN-DC capability

AssigneeSamsung Electronics Co., Ltd.

InventorsDanish Ehsan Hashmi, Pratibha Kattemane Satyaganapati, Shouvik Guha, Arijit Sen, Ramesh Chandra Vuppala, Satheesh Kumar Rampelli

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Abstract

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Methods and systems for managing bearer configuration of user equipment (UE) with Evolved-Universal Terrestrial Radio Access Network-New Radio-Dual Connectivity (E-UTRAN-NR-DC) (EN-DC) capability. The UE detects connectivity issues in the UE itself and in interfaces connecting between a NR network with the UE, a LTE network, or an EPC that require disabling NR capability of the UE. The bearer configuration is determined and updated based on the detected connectivity issues. The UE signals the LTE network about the disabling of NR capability, requests enabling of data transfer through bearers of a MCG bearers associated with the LTE network in a current MCG RRC session, and prevents addition of SCG bearers associated with the NR network. The UE recovers data in the SCG bearers, lost due the issues in the NR network, through the MCG bearers. The UE can send a Tracking Area Update (TAU) to indicate the disabling of NR capability if the connectivity issues persist.

Claims16

Dependent claims

A method for managing bearer configuration of a User Equipment (UE) with Evolved-Universal Terrestrial Radio Access Network-New Radio-Dual Connectivity (E-UTRAN-NR-DC) (EN-DC) capability, the method comprising:

detecting, by the UE, an interruption of an ongoing data session due to occurrence of at least one connectivity issue in at least one interface associated with a Fifth Generation (5G) network of the UE;
determining, by the UE, a bearer configuration of the UE;
based on determining that the bearer configuration is one of a Master Cell Group (MCG) split bearer and a Secondary Cell Group (SCG) split bearer, signaling, by the UE, that the at least one connectivity issue is detected in the UE to a Fourth Generation (4G) network to which the UE is connected;
periodically performing, by the UE, 5G signal measurements, wherein the 5G measurements are performed with a periodicity of a first predefined time period;
detecting whether the at least one connectivity issue continues to persist after expiration of the first predefined time period, wherein persistence of the at least one connectivity issue is detected by at least one of the UE and the 4G network;
determining, by the UE, a count of failed attempts to connect to the 5G network if the at least one connectivity issue continues to persist after the expiration of the first predefined time period, wherein the count is incremented if the at least one connectivity issue continues to persist;
determining, by the UE, that the count is greater than a predefined threshold number of failed attempts;
performing, by the UE, at least one of:
requesting the 4G network to prevent adding SCG bearers in a current MCG Radio Resource Control (RRC) session;
requesting the 4G network to disable the SCG bearers;
and
sending a first Tracking Area Update (TAU) to the 4G network after releasing the current MCG RRC session if there is no ongoing transfer of priority data through the MCG bearers,
wherein the first TAU indicates disabling of NR capability of the UE, and
wherein recovery of the ongoing data session is initiated in a new MCG RRC session.

11 more elements

A User Equipment (UE), with Evolved-Universal Terrestrial Radio Access Network-New Radio-Dual Connectivity (E-UTRAN-NR-DC) (EN-DC) capability, for managing bearer configuration of the UE, the UE comprising at least one processor configured to:

detect interruption in an ongoing data session due to an occurrence of at least one connectivity issue in at least one interface associated with a Fifth Generation (5G) network of the UE;
determine a bearer configuration of the UE;
based on determining that the bearer configuration is one of a Master Cell Group (MCG) split bearer and a Secondary Cell Group (SCG) split bearer, signal a Fourth Generation (4G) that the at least one connectivity issue is detected in the UE;
periodically perform 5G signal measurements, wherein the 5G measurements are performed with a periodicity of a first predefined time period;
detect whether the at least one connectivity issue continues to persist after expiration of the first predefined time period, wherein persistence of the at least one connectivity issue is detected by at least one of the UE and the 4G network;
determine a count of failed attempts to connect to the 5G network if the at least one connectivity issue continues to persist after the expiration of the first predefined time period, wherein the count is incremented if the at least one connectivity issue continues to persist;
determine that the count is greater than a predefined threshold number of failed attempts;
perform at least one of:
request the 4G network to prevent adding SCG bearers in a current MCG Radio Resource Control (RRC) session;
request the 4G network to disable the SCG bearers;
and
send a first Tracking Area Update (TAU) to the 4G network after releasing the current MCG RRC session if there is no ongoing transfer of priority data through the MCG bearers,
wherein the first TAU indicates disabling of NR capability of the UE, and wherein recovery of the ongoing data session is initiated in a new MCG RRC session.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/787,746Filed 11 Feb 2020
Priority: IN 20194100554112 Feb 2019
Published: US 2020/0260515 A113 Aug 2020
Granted: 19 Apr 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification27 codes

H04W 76/15
Connection setup: setup of multiple wireless link connections
H04L 5/001
The frequencies being orthogonal, e.g. OFDM or DMT: the frequencies being arranged in component carriers
H04L 5/0055
Allocation of signalling, i.e. of overhead other than pilot signals: physical resource allocation for ACK/NACK
H04W 8/24
Processing or transfer of terminal data, e.g. status or physical capabilities: transfer of terminal data

Family

US 2020/0260515 A1Pre-grant publication · published 13 Aug 2020
US 11,246,179 B2Related patent
US 11,310,855 B2This patent

From the US filing history. Foreign family members aren’t listed.

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