System and method for determining establishment causes for emergency sessions
AssigneeBlackBerry Limited
InventorsChen Ho Chin, Richard C. Burbidge
Life of this patent
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Abstract
A method for initiating a Packet Switched emergency call using a user equipment (UE) is presented. The UE includes a plurality of protocol layers. The plurality of protocol layers including an IMS sublayer, a non-access stratum (NAS) layer and an access stratum (AS) layer. The method includes generating an ATTACH REQUEST using the UE. The ATTACH REQUEST has an attach type. The method includes retrieving the attach type of the ATTACH REQUEST using the NAS layer of the UE, and generating an RRC CONNECTION REQUEST. The RRC CONNECTION REQUEST includes an RRC establishment cause based upon the attach type of the attach request.
Claims18
A method for initiating a Packet Switched (PS) emergency call using a user equipment (UE), the UE including a plurality of protocol layers, the plurality of protocol layers including an Internet Protocol (IP) Multimedia Subsystem (IMS) sublayer, a non-access stratum (NAS) layer and an access stratum (AS) layer, the method comprising:
- generating, at the UE, a first request comprising an indicator that indicates a request type;
- determining, at the UE, a Radio Resource Control (RRC) establishment cause based on the request type, wherein the RRC establishment cause indicates that the UE is requesting an establishment of an RRC connection for an emergency call via a PS network;
- and
- generating, at the UE, an RRC CONNECTION REQUEST, the RRC CONNECTION REQUEST including the RRC establishment cause.
A user equipment (UE), comprising:
- a plurality of protocol layers, the plurality of protocol layers including an Internet Protocol (IP) Multimedia Subsystem (IMS) sublayer, a non-access stratum (NAS) layer and an access stratum (AS) layer;
- a memory;
- and
- at least one hardware processor communicatively coupled with the memory and configured to:
- generate, at the UE, a first request comprising an indicator that indicates a request type;
- determine, at the UE, a Radio Resource Control (RRC) establishment cause based on the request type, wherein the RRC establishment cause indicates that the UE is requesting an establishment of an RRC connection for an emergency call via a Packet Switched (PS) network;
- and
- generate, at the UE, an RRC CONNECTION REQUEST, the RRC CONNECTION REQUEST including the RRC establishment cause.
A non-transitory computer-readable medium storing instructions which, when executed, cause a computing device to perform operations for initiating a Packet Switched (PS) emergency call using a user equipment (UE), the operations comprising:
- generating, at the UE, a first request comprising an indicator that indicates a request type, wherein the UE comprises a plurality of protocol layers, the plurality of protocol layers including an Internet Protocol (IP) Multimedia Subsystem (IMS) sublayer, a non-access stratum (NAS) layer and an access stratum (AS) layer;
- and
- determining, at the UE, a Radio Resource Control (RRC) establishment cause based on the request type, wherein the RRC establishment cause indicates that the UE is requesting an establishment of an RRC connection for an emergency call via a PS network;
- and
- generating, at the UE, an RRC CONNECTION REQUEST, the RRC CONNECTION REQUEST including the RRC establishment cause.
Dependencies are inferred from the claim text.