US 11,153,793 B2Granted

Reducing data latency when cellular access is barred

AssigneeQUALCOMM Incorporated

InventorsFeilu Liu, Suli Zhao, Can Zhao, Mona Agrawal

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Abstract

Wireless communication methods, devices, and systems to reduce latency when network access (e.g., cellular network access) is barred are described. A method includes receiving, by a user equipment (UE) from an application, a request for at least one of establishment of a packet data unit (PDU) session or uplink (UL) data transfer via a previously established PDU session. The method additionally includes evaluating that access to a first network (e.g., a 3rd Generation Partnership Project (3GPP) network) is barred. The method also includes determining that the access barring time exceeds a threshold, and checking, in response to the determining, that configured policies permit the PDU session to be on a second network (e.g., a non-3GPP network). The method further includes transferring data of the PDU session in accordance with the configured policies. Other aspects and features are also claimed and described.

Claims24

Dependent claims

A method of performing wireless communication, the method comprising:

receiving, by a user equipment (UE) from an application, a request for at least one of establishment of a packet data unit (PDU) session or uplink (UL) data transfer via a previously established PDU session;
evaluating, by the UE in response to the request, that the requested establishment of the PDU session or UL data transfer via the previously established PDU session to a first network is barred by access control and an access barring time;
determining, by the UE, that the access barring time exceeds a threshold;
setting to unavailable, by the UE in response to the determining, an access control availability status for the PDU session;
assessing a consolidated first network availability status based, at least in part, on the access control availability status for the PDU session and a non-access control availability status of the UE;
detecting, by the UE, that the consolidated first network availability status for the PDU session was changed to unavailable as a result of the setting;
checking, by the UE in response to the detecting, that configured policies permit the requested or previously established PDU session to be on a second network;
and
transferring, by the UE, data of the requested or previously established PDU session on the second network in accordance with the configured policies, while the non-access control availability status of the UE with respect to the first network is set to available, based, at least in part, on the detecting.

6 more elements

A wireless communication apparatus, the apparatus comprising:

one or more computer processors;
and
one or more memories coupled to the one or more computer processors, wherein the one or more computer processors are configured to:
receive, by a user equipment (UE) from an application, a request for at least one of establishment of a packet data unit (PDU) session or uplink (UL) data transfer via a previously established PDU session;
evaluate, by the UE in response to the request, that the requested establishment of the PDU session or UL data transfer via the previously established PDU session to a first network is barred by access control and an access barring time;
determine, by the UE, that the access barring time exceeds a threshold;
set to unavailable, by the UE in response to the determination, an access control availability status for the PDU session;
assess a consolidated first network availability status based, at least in part, on the access control availability status for the PDU session and a non-access control availability status of the UE;
detect, by the UE, that the consolidated first network availability status for the PDU session was changed to unavailable as a result of the setting;
check, by the UE in response to the detection, that configured policies permit the requested or previously established PDU session to be on a second network;
and
transfer data of the requested or previously established PDU session on the second network in accordance with the configured policies, while the non-access control availability status of the UE with respect to the first network is set to available.

9 more elements

A non-transitory computer-readable medium having instructions recorded thereon that, when enacted by one or more computer processors, cause the one or more computer processors to:

receive, by a user equipment (UE) from an application, a request for at least one of establishment of a packet data unit (PDU) session or uplink (UL) data transfer via a previously established PDU session;
evaluate, by the UE in response to the request, that the requested establishment of the PDU session or UL data transfer via the previously established PDU session to a first network is barred by access control and an access barring time;
determine, by the UE, that the access barring time exceeds a threshold;
set to unavailable, by the UE in response to the determination, an access control availability status for the PDU session;
assess a consolidated first network availability status based, at least in part, on the access control availability status for the PDU session and a non-access control availability status of the UE;
detect, by the UE, that the consolidated first network availability status for the PDU session was changed to unavailable as a result of the setting;
check, by the UE in response to the detection, that configured policies permit the requested or previously established PDU session to be on a second network;
and
transfer data of the requested or previously established PDU session on the second network in accordance with the configured policies, while the non-access control availability status of the UE with respect to the first network is set to available.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/387,275Filed 17 Apr 2019
Published: US 2020/0336953 A122 Oct 2020
Granted: 19 Oct 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04W 48/18
Access restriction ; Network selection; Access point selection: selecting a network or a communication service
H04W 48/02
Access restriction ; Network selection; Access point selection: access restriction performed under specific conditions
H04W 36/00226
Between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]: wherein the core network…
H04W 36/0055
Control or signalling for completing the hand-off: transmission or use of information for re-establishing the radio link