Method and system of circuit switched domain page realization, method of service realization

Patent metadata

Field	Value
Publication number	US-9380561-B2
Application number	US-86595209-A
Country	US
Kind code	B2
Filing date	Jan 24, 2009
Priority date	Feb 3, 2008
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

A method and a system for implementing CS domain paging are disclosed, applied in scenarios of performing CS domain paging for a called UE after ISR function is introduced in PS domain, and comprising: MSC/VLR only storing one Gs association; during CS domain paging, MSC/VLR sending a CS domain paging request message to the PS domain network element recorded in the Gs association in the MSC/VLR; after receiving the message, the PS domain network element initiating one or two CS domain paging procedures in the PS domain to transmit the CS domain paging to the called UE; or sending a paging response to the MSC/VLR directly without initiating CS domain paging. A method for transferring service information is also disclosed, applied in the scenarios that ISR function is activated in PS domain, and comprising: transmitting service message(s) between the ISR-associated PS domain network elements serving the UE to implement transfer of service information.

First claim

What we claim is:

1. A method for implementing paging for Circuit Switched (CS) service, comprising:
Mobile Switching Center (MSC)/Visitor Location Register (VLR) storing only one Gs association recording a first Packet Switched (PS) domain network element of a first radio access network in a scenario that Idle-mode Signaling Reduction (ISR) function has been introduced in the PS domain;
when performing the paging for CS service to a terminating User Equipment (UE), the MSC/VLR sending a CS domain paging request message to the first PS domain network element recorded in the only one Gs association stored in the MSC/VLR; and
when ISR is active, after receiving the CS domain paging request message,
the first PS domain network element initiating one paging procedure for the terminating UE to be performed in the first radio access network, and the first PS domain network element sending a CS domain paging message to a second PS domain network element to initiate another paging procedure for the terminating UE to be performed in a second radio access network; or when the first PS domain network element determines that the UE is in idle mode in the first radio access network, the first PS domain network element initiating one paging procedure for the terminating UE to be performed in the first radio access network, and the first PS domain network element sending a CS domain paging message to a second PS domain network element to initiate another paging procedure for the terminating UE to be performed in a second radio access network;
wherein when the first PS domain network element is a Mobility Management Entity (MME), the first radio access network is Evolved Universal Mobile Telecommunication System Terrestrial Radio Access Network (E-UTRAN), the second PS domain network element is a Serving General packet radio service Support Node (SGSN), the second radio access network is Global System for Mobile communication (GSM) Enhanced Data Rate for GSM Evolution Radio Access Network (GERAN)/Universal Mobile Telecommunication System Terrestrial Radio Access Network (UTRAN), the step of the first PS domain network element sending the CS domain paging message to the second PS domain network element comprises: the MME sending the CS domain paging message to the SGSN according to SGSN information obtained during ISR activation in Tracking Area Update (TAU) procedure to inform the SGSN of paging the UE in the GERAN/UTRAN; or
when the first PS domain network element is a SGSN, the first radio access network is GERAN/UTRAN, the second PS domain network element is a MME, the second radio access network is E-UTRAN, the step of the first PS domain network element sending the CS domain paging message to the second PS domain network element comprises: the SGSN sending the CS domain paging message to the MME according to MME information obtained during ISR activation in Routing Area Update (RAU) procedure to inform the MME of paging the UE in the E-UTRAN.

2. The method according to claim 1 , wherein when the ISR is active,
the first PS domain network element initiates the CS domain paging procedures of the GSM/UMTS and the EPS to be performed respectively in the GERAN/UTRAN and the E-UTRAN upon receiving the CS domain paging request message; or
the first PS domain network element initiates the CS domain paging to be performed only in the GERAN/UTRAN or E-UTRAN.

3. The method according to claim 2 , wherein:
if the first PS domain network element is a MME, the MME initiates the CS domain paging in the E-UTRAN and sends a CS domain paging message to an ISR-associated SGSN to inform the SGSN to initiate the CS domain paging in the GERAN/UTRAN;
if the first PS domain network element is a SGSN, the SGSN initiates the CS domain paging in the GERAN/UTRAN, and sends a CS domain paging message to an ISR-associated MME to inform the MME to initiate the CS domain paging in the E-UTRAN;
if the first PS domain network element is a MME and the terminating UE camps on E-UTRAN, the MME only initiates the CS domain paging in the E-UTRAN;
if the first PS domain network element is a MME and the terminating UE camps on GERAN/UTRAN, the MME sends a CS domain paging message to an ISR-associated SGSN to inform the SGSN to initiate the CS domain paging in the GERAN/UTRAN;
if the first PS domain network element is a SGSN and the terminating UE camps on the E-UTRAN, the SGSN sends a CS domain paging message to an ISR-associated MME to inform the MME to initiate the CS domain paging in the E-UTRAN;
if the first PS domain network element is a SGSN and the terminating UE camps on the GERAN/UTRAN, the SGSN initiates the CS domain paging in the GERAN/UTRAN.

4. The method according to claim 1 , wherein:
after receiving the CS domain paging request message,
when the first PS domain network element determines that the UE is currently in connected mode in the first radio access network, the PS domain network element initiates only one paging procedure for the terminating UE to be performed in the first radio access network; or
when the first PS domain network element determines that the UE is currently in idle mode in the first radio access network, the first PS domain network element sends a CS paging request to the second PS domain network element of the second radio access network, wherein
when the second PS domain network element determines that the UE is currently in idle mode in the second radio access network, the second PS domain network element performs the paging procedure in the second radio access network and sends a CS paging response to the first PS domain network element to tell the first PS domain network element to also perform the paging procedure in the first radio access network, or
when the second PS domain network element determines that the UE is currently in connected mode in the second radio access network, the second PS domain network element performs the paging procedure in the second radio access network, and sends a CS paging response to the first PS domain network element to tell the first PS domain network element not to perform the paging procedure in the first radio access network, or does not reply the CS paging request, the first PS domain network element does not perform the paging procedure in the first radio access network when receiving no CS paging response.

5. A system for implementing a paging for Circuit Switched (CS) service, comprising a Mobile Switching Center (MSC)/Visitor Location Register (VLR), and a first Packet Switched (PS) domain network element in a first radio access network, wherein:
the MSC/VLR stores only one Gs association recording the first PS domain network element of the first radio access network in a scenario that Idle-mode Signaling Reduction (ISR) function has been introduced in the PS domain, and the MSC/VLR is configured to: send a CS domain paging request message to the first PS domain network element recorded in the only one Gs association stored in the MSC/VLR in a process of CS domain paging to a terminating User Equipment (UE);
when ISR is active, the first PS domain network element is configured to: after receiving the CS domain paging request message,
initiate one paging procedure for the terminating UE to be performed in the first radio access network and send a CS domain paging message to a second PS domain network element to initiate another paging procedure for the terminating UE to be performed in a second radio access network; or when the first PS domain network element determines that the UE is in idle mode in the first radio access network, initiate one paging procedure for the terminating UE to be performed in the first radio access network and send a CS domain paging message to a second PS domain network element to initiate another paging procedure for the terminating UE to be perf

Assignees

• Hu Ying
• Yu Zhiming
• Zhu Jinguo
• Yu Lei
• Geng Liping
• Zte Corp

Inventors

• Hu Ying
• Yu Zhiming
• Zhu Jinguo
• Yu Lei
• Geng Liping

Classifications

• H04W60/005

  Multiple registrations, e.g. multihoming · CPC title

• H04W68/12 Primary

  Inter-network notification · CPC title

• H04W8/06

  Registration at serving network Location Register, VLR or user mobility server · CPC title