US 10,757,590 B2Granted

User equipment (UE) and methods for registration of circuit-switched (CS) services in multi-mode operation

AssigneeApple Inc.

InventorsDeepak Dash, Nitin Gowda Basavarajappa, Anuroop Sobhan Madupu

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Abstract

Embodiments of a User Equipment (UE) and methods for communication in multi-mode environments are generally described herein. The UE may operate in a failure state as part of a packet-switched (PS) communication session with a PS network, such as a 3GPP LTE network. The UE may determine that a circuit-switched (CS) communication session with a CS network is to be established. The UE may transmit, while operating in the failure state of the PS communication session, a CS registration message to a CS base station of the CS network as part of an establishment of the CS communication session. The UE may refrain from transmission, while operating in the failure state, of messages to the PS network for the establishment of the CS communication session.

Claims13

Dependent claims

An apparatus of a user equipment (UE) configured for multi-mode operation in an Evolved Universal Terrestrial Radio Access Network (E-UTRAN), the apparatus comprising:

processing circuitry;
and
memory coupled to the processing circuitry,
the processing circuitry configured to:
configure the UE to operate in an Evolved Packet System (EPS) Mobility Management (EMM) REGISTERED (EMM-REGISTERED) state when attached to an Evolved Packet Core Network (EPC);
configure the UE to operate in an EMM-DEREGISTERED state when unattached to the EPC;
initiate a combined attach procedure for the multi-mode operation when the UE is in the EMM-DEREGISTERED state to attempt to attach to the EPC, the combined attach procedure to attach to the EPC for both EPS and non-EPS services;
configure the UE to enter an EMM-DEREGISTERED.ATTEMPTING-TO-ATTACH state if the combined attach procedure has failed;
when the UE is in the EMM-DEREGISTERED.ATTEMPTING-TO-ATTACH state, the processing circuitry is to configure the UE to use requests for non-EPS services from a connection management (CM) layer of the UE to attempt to trigger the combined attach procedure, if mobility management backoff timer T3346 is not running or to attempt to select GSM/EDGE Radio Access Network (GERAN) or Universal Terrestrial Radio Access Network (UTRAN) radio-access technology (RAT) and proceed with the appropriate mobility management (MM) and call control (CC) specific procedures;
initiate a combined tracking area updating (TAU) procedure when the UE is in the EMM-REGISTERED state;
configure the UE to enter a EMM-REGISTERED.ATTEMPTING-TO-UPDATE state if the combined TAU procedure has failed;
when the UE is in the EMM-REGISTERED.ATTEMPTING-TO-UPDATE state, the processing circuitry is to configure the UE to use requests for non-EPS services from the CM layer to trigger the combined TAU procedure, if the mobility management backoff timer T3346 is not running, or to attempt to select the GERAN or the UTRAN radio access technology and proceed with the appropriate MM and CC specific procedures,
wherein if the combined attach procedure is successful, the processing circuitry configures the UE for the multi-mode operation comprising packet-switched (PS) operation for the EPS services and circuit-switch (CS) operation for the non-EPS services;
and
wherein the memory is configured to store an indication of the UE's state.

12 more elements

A non-transitory computer-readable storage medium that stores instructions for execution by processing circuitry a user equipment (UE) to configure the UE for multi-mode operation in an Evolved Universal Terrestrial Radio Access Network (E-UTRAN), the processing circuitry configured to:

configure the UE to operate in an Evolved Packet System (EPS) Mobility Management (EMM) REGISTERED (EMM-REGISTERED) state when attached to an Evolved Packet Core Network (EPC);
configure the UE to operate in an EMM-DEREGISTERED state when unattached to the EPC;
initiate a combined attach procedure when the UE is in the EMM-DEREGISTERED state to attempt to attach to the EPC, the combined attach procedure to attach for both EPS and non-EPS services;
configure the UE to enter an EMM-DEREGISTERED.ATTEMPTING-TO-ATTACH state if the combined attach procedure has failed;
when the UE is in the EMM-DEREGISTERED.ATTEMPTING-TO-ATTACH state, the processing circuitry is to configure the UE to use requests for non-EPS services from a connection management (CM) layer of the UE to attempt to trigger the combined attach procedure, if mobility management backoff timer T3346 is not running or to attempt to select GSM/EDGE Radio Access Network (GERAN) or Universal Terrestrial Radio Access Network (UTRAN) radio-access technology (RAT) and proceed with the appropriate mobility management (MM) and call control (CC) specific procedures;
initiate a combined tracking area updating (TAU) procedure when the UE is in the EMMREGISTERED state;
configure the UE to enter an EMM-REGISTERED.ATTEMPTING-TO-UPDATE state if the combined TAU procedure has failed;
when the UE is in the EMM-REGISTERED.ATTEMPTING-TO-UPDATE state, the processing circuitry is to configure the UE to use requests for non-EPS services from the CM layer to trigger the combined TAU procedure, if the mobility management backoff timer T3346 is not running, or to attempt to select the GERAN or the UTRAN radio access technology and proceed with the appropriate MM and CC specific procedures,
wherein if the combined attach procedure is successful, the processing circuitry configures the UE for the multi-mode operation comprising packet-switched (PS) operation for the EPS services and circuit-switch (CS) operation for the non-EPS services;
and
wherein the processing circuitry configures an indication of the UE's state to be stored in memory.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/765,329Filed 9 Mar 2016 · us provisional application
Priority: 2 Oct 2015
Published: US 2018/0310190 A125 Oct 2018
Granted: 25 Aug 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04W 24/04
Supervisory, monitoring or testing arrangements: arrangements for maintaining operational condition
H04W 36/0022
For data sessions of end-to-end connection: for transferring data sessions between adjacent core network technologies
H04W 36/14
Hand-off or reselection arrangements: reselecting a network or an air interface
H04W 48/18
Access restriction ; Network selection; Access point selection: selecting a network or a communication service