WO2014059568A1

WO2014059568A1 - Switching processing method and device in wireless communication system

Info

Publication number: WO2014059568A1
Application number: PCT/CN2012/081554
Authority: WO
Inventors: 徐小英; 陈东; 仇力炜; 杨旭东
Original assignee: 华为技术有限公司
Priority date: 2012-09-18
Filing date: 2012-09-18
Publication date: 2014-04-24
Also published as: WO2014043897A1

Abstract

Provided are a switching processing method and device in a wireless communication system. On the one hand, a terminal in the embodiments of the present application determines to execute an operation for switching the voice service of the terminal to a PS domain; and if the up-to-date configuration security domain of the terminal is a CS domain, the up-to-date configuration security domain of the terminal is set as the PS domain via the terminal, so that the terminal can process the SRB of the terminal using a key corresponding to the PS domain. Since a target access network device processes the SRB of the terminal using the key corresponding to the PS domain and transmitted by a target mobile management device, keys used aiming at the SRB by the terminal and the target access network device are consistent, which can successfully switch the voice service of the terminal to the PS domain for bearing, thereby improving the switching reliability.

Description

TECHNICAL FIELD The present application relates to communication technologies, and in particular, to a handover processing method and apparatus in a wireless communication system. Background technique

In a wireless communication system, a wideband code division multiple access (WCDMA) system, a voice service may include two bearer mechanisms, and one is circuit switched (Circuit Switched, CS). The session-type service carried by the domain, and the other is a session-type service carried by the packet switching (PS) domain, which is also called a voice over Internet protocol (VoIP) service. The terminal and the target access network device can perform a reverse single-channel voice call continuity (SRVCC) handover procedure, and switch the voice service to the PS domain for bearer.

However, after the terminal performs the reverse SRVCC handover procedure, the key used by the terminal and the target access network device for the Signaling Radio Bearer (SRB) is inconsistent, and the voice service cannot be switched to the PS domain for bearer. This results in a reduction in the reliability of the handover. SUMMARY OF THE INVENTION Aspects of the present application provide a handover processing method and apparatus within a wireless communication system for improving handover reliability.

An aspect of the present application provides a handover processing method in a wireless communication system, including: determining, by a terminal, an operation of switching a voice service of the terminal to a PS domain;

If the latest configuration security domain of the terminal is a CS domain, the terminal sets the latest configuration security domain of the terminal as a PS domain;

The terminal processes the SRB of the terminal by using a key corresponding to the PS domain. The foregoing aspect and any possible implementation manner further provide an implementation manner, where the terminal determines to perform an operation of switching the voice service of the terminal to the PS domain, including:

The terminal receives a handover message or a NAS message, where the handover message or the NAS message includes indication information, where the indication information is used to indicate that the voice service of the terminal is switched to the PS domain. The foregoing aspect, and any possible implementation manner, further provide an implementation manner, before the terminal processes the SRB of the terminal by using a key corresponding to the PS domain, the method further includes:

The terminal generates a key corresponding to the PS domain according to a key corresponding to the CS domain. In another aspect of the present application, a handover processing method in a wireless communication system is provided, including: the target access network device determines to perform an operation of switching a voice service of the terminal to a PS domain; and if the latest configured security domain of the terminal is a CS domain, where the target access network device processes the SRB of the terminal by using the first key sent by the source access network device; or

If the latest configured security domain of the terminal is a PS domain, the target access network device processes the SRB of the terminal by using the second key sent by the target mobility management device.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the target access network device determines to perform an operation of switching the voice service of the terminal to the PS domain, including:

The target access network device receives the handover message, where the handover message includes indication information, where the indication information is used to indicate that the voice service of the terminal is switched to the PS domain.

The foregoing aspect, and any possible implementation manner, further provide an implementation manner, after the target access network device determines to perform the operation of switching the voice service of the terminal to the PS domain, the method further includes:

The target access network device receives the container cell sent by the source access network device, where the container cell includes the latest configured security domain of the terminal.

In another aspect of the present application, a terminal is provided, including:

a determining unit, configured to determine to perform an operation of switching the voice service of the terminal to the PS domain, and a configuration unit, configured to: if the latest configured security domain of the terminal is a CS domain, set the latest configured security domain of the terminal to PS domain;

And a processing unit, configured to process the SRB of the terminal by using a key corresponding to the PS domain.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the terminal further includes a receiving unit, where

Receiving a handover message or a NAS message, where the handover message or the NAS message includes indication information, where the indication information is used to indicate that the voice service of the terminal is switched to the PS domain. The foregoing aspect and any possible implementation manner further provide an implementation manner, where the processing unit is further used to

Generating a key corresponding to the PS domain according to a key corresponding to the CS domain.

Another aspect of the present application provides a target access network device, including:

a determining unit, configured to determine an operation of switching a voice service of the terminal to the PS domain;

If the latest configured security domain of the terminal is a CS domain, the SRB of the terminal is processed by using the first key sent by the source access network device; or

If the latest configured security domain of the terminal is a PS domain, the SRB of the terminal is processed by using the second key sent by the target mobility management device.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the target access network device further includes a receiving unit, where

And receiving the handover message, where the handover message includes indication information, where the indication information is used to indicate that the voice service of the terminal is switched to the PS domain.

An aspect as described above, and any possible implementation manner, further providing an implementation manner, where the receiving unit is further used

And receiving, by the source access network device, a container cell, where the container cell includes an latest configured security domain of the terminal.

a memory for storing program code, the program code comprising computer operation instructions, a processor, executing the program code, for determining to perform an operation of switching a voice service of the terminal to a PS domain; The newly configured security domain is a CS domain, and the latest configured security domain of the terminal is set as a PS domain; and the SRB of the terminal is processed by using a key corresponding to the PS domain.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the terminal further includes a network interface, where

And receiving the handover message or the NAS message, where the handover message or the NAS message includes indication information, where the indication information is used to indicate that the voice service of the terminal is switched to the PS domain.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the processor is further used to Generating a key corresponding to the PS domain according to a key corresponding to the CS domain.

a memory for storing program code, the program code comprising computer operation instructions; a processor executing the program code, configured to determine an operation of switching a voice service of the terminal to the PS domain; and if the terminal is up to date The security domain is configured as a CS domain, and the SRB of the terminal is processed by using the first key sent by the source access network device; or if the latest configured security domain of the terminal is a PS domain, sent by the target mobility management device. The second key processes the SRB of the terminal.

An aspect of the foregoing, and any possible implementation manner, further provide an implementation manner, where the target access network device further includes a network interface, where

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the network interface is further used to

According to the foregoing technical solution, on the one hand, the terminal in the embodiment of the present application determines to perform an operation of switching the voice service of the terminal to the PS domain, and if the latest configured security domain of the terminal is a CS domain, the terminal will The latest configuration security domain of the terminal is configured as a PS domain, so that the terminal can process the SRB of the terminal by using a key corresponding to the PS domain, because the target access network device uses the target mobility management device to send The key corresponding to the PS domain is processed by the SRB of the terminal. Therefore, the terminal and the target access network device are consistent with the key used by the SRB, and the voice service of the terminal can be successfully switched to The PS domain carries the bearer, thereby improving the reliability of the handover.

According to the foregoing technical solution, on the one hand, the target access network device in the embodiment of the present application determines to perform the operation of switching the voice service of the terminal to the PS domain, and if the latest configured security domain of the terminal is the CS domain, The target access network device processes the SRB of the terminal by using the first key sent by the source access network device, or uses the target access network device if the latest configured security domain of the terminal is a PS domain. The second key sent by the target mobility management device processes the SRB of the terminal, and both the terminal and the target mobility management device utilize the latest configuration of the terminal. The key corresponding to the security domain is processed, and the SRB of the terminal is processed. Therefore, the terminal and the target access network device are consistent with the key used by the SRB, and the voice service of the terminal can be successfully switched to the PS. The domain carries the bearer, thereby improving the reliability of the handover. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

FIG. 1 is a schematic flowchart of a handover processing method in a wireless communication system according to an embodiment of the present disclosure;

2 is a schematic flowchart of a handover processing method in a wireless communication system according to another embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a target access network device according to another embodiment of the present disclosure; FIG. 6 is a schematic structural diagram of a target access network device according to another embodiment of the present disclosure; Schematic diagram of the terminal;

FIG. 8 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a target access network device according to another embodiment of the present disclosure; FIG. 10 is a schematic structural diagram of a target access network device according to another embodiment of the present application. The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. The embodiments are part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present invention.

The technical solution of the present application can be applied to various communication systems, for example, the global mobile communication system Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS) System, Code Division Multiple Access (CDMA) System, CDMA2000 System, Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA for short), Long Term Evolution (LTE) system or World Interoperability for Microwave Access (WiMAX) system.

The access network device may be a base station controller (BSC) in a GSM system, a GPRS system or a CDMA system, or a radio network controller (RNC) in a CDMA2000 system or a WCDMA system. And may be an evolved base station (Evolved NodeB, eNB for short) in the LTE system, or may be a network element such as an access service network base station (ASN BS) in the WiMAX network.

The mobility management device may be a GSM system, a GSM system or a GSM system in a CDMA system, a GPRS system or a Mobile Switching Center (MSC) in a CDMA system, or a service in a GPRS system or a CDMA system. The General Packet Radio Service (GPRS) Supporting Node (SGSN) may also be a Mobility Management Entity (MME) in the LTE system.

In addition, the term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate: A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "," in this paper, generally means that the contextual object is an "or" relationship.

FIG. 1 is a schematic flowchart of a handover processing method in a wireless communication system according to an embodiment of the present disclosure, as shown in FIG. 1.

101. The terminal determines to perform an operation of switching the voice service of the terminal to the PS domain.

102. If the latest configuration security domain (LATEST_CONFIGURED_CN_DOMAIN) of the terminal is a CS domain, the terminal sets the latest configured security domain of the terminal to a PS domain.

103. The terminal processes the SRB of the terminal by using a key corresponding to the PS domain. Specifically, the terminal processes the SRB of the terminal by using a key corresponding to the PS domain, and may perform encryption processing on the SRB of the terminal by using the key corresponding to the PS domain by the terminal. The decryption process is performed, or the terminal may perform integrity protection processing on the SRB of the terminal by using the key corresponding to the PS domain.

It can be understood that the operation of the terminal to perform the handover of the voice service of the terminal to the PS domain, that is, the reverse SRVCC handover procedure in the wireless communication system, may include the following three handover scenarios.

Scenario 1: The latest configuration security domain of the terminal is a CS domain, and the established bearer for carrying the voice service of the terminal is a CS domain bearer, and the voice service of the terminal is to be switched to the PS domain.

Scenario 2: The latest configuration security domain of the terminal is a CS domain, and the bearer of the terminal may include an established CS domain bearer for carrying the voice service of the terminal and an established PS for carrying the terminal. The PS domain of the domain service is carried, and the voice service of the terminal is to be switched to the PS domain.

Scenario 3: The newly configured security domain of the terminal is a PS domain, and the bearer of the terminal may include an established CS domain bearer for carrying the voice service of the terminal and an established PS for carrying the terminal. The PS domain of the domain service is carried, and the voice service of the terminal is to be switched to the PS domain.

Optionally, in a possible implementation manner of this embodiment, before the terminal, the terminal may further receive the handover message sent by the source access network device or the non-access layer sent by the source mobility management device (Non The information of the access message or the NAS message includes indication information, where the indication information is used to indicate that the voice service of the terminal is switched to the PS domain.

For example, the handover message may be a message such as a radio bearer setup message, which is not limited in this embodiment. For example, the NAS message may be a message such as an identifier request message, which is not limited in this embodiment.

Specifically, the indication information may include one of the following forms:

Carrying the established configuration information, the configuration information of the bearer includes only the bearer configuration information of the PS domain, and the CS bearer before the handover is deleted;

Parameters for the handover, for example, key derivation parameters, destination addresses, port or encoding type information used for data transmission for voice services after handover, and the like.

Optionally, in a possible implementation manner of this embodiment, before 103, the terminal The key corresponding to the PS domain may be further generated according to a key corresponding to the CS domain. Specifically, the terminal receives a key derivation parameter sent by the source access network device or the source mobility management device.

(None), according to the key derivation parameter and the key corresponding to the CS domain, using a derivation algorithm to generate a key corresponding to the PS domain, and replacing the original PS domain with the generated key Corresponding key.

In this embodiment, the terminal determines to perform an operation of switching the voice service of the terminal to the PS domain, and if the latest configured security domain of the terminal is a CS domain, the terminal configures the latest configured security domain of the terminal as a PS domain, the terminal is configured to process the SRB of the terminal by using a key corresponding to the PS domain, where the target access network device uses the key corresponding to the PS domain sent by the target mobility management device, The SRB of the terminal is processed. Therefore, the terminal and the target access network device are consistent with the key used by the SRB, and the voice service of the terminal can be successfully switched to the PS domain for bearer, thereby improving handover. reliability.

FIG. 2 is a schematic flowchart of a handover processing method in a wireless communication system according to another embodiment of the present application, as shown in FIG. 2.

201. The target access network device determines to perform an operation of switching the voice service of the terminal to the PS domain.

202. If the latest configured security zone of the terminal is a CS domain, the target access network device processes the SRB of the terminal by using the first key sent by the source access network device; or, if the terminal The latest configuration security domain is a PS domain, and the target access network device processes the SRB of the terminal by using the second key sent by the target mobility management device.

Specifically, the target access network device processes the SRB of the terminal by using the first key sent by the source access network device, and may use the first key for the target access network device, The SRB of the terminal performs encryption processing or decryption processing, or may further perform integrity protection processing on the SRB of the terminal by using the first key for the target access network device.

Specifically, the target access network device processes the SRB of the terminal by using the second key sent by the target mobility management device, and may use the second key for the target access network device. The SRB of the terminal performs encryption processing or decryption processing, or may further perform integrity protection processing on the SRB of the terminal by using the second key for the target access network device.

The first key is a key corresponding to the CS domain, and the second key is a key corresponding to the PS domain.

It can be understood that the target access network device determines that the voice service of the terminal is performed. The operation of switching to the PS domain, that is, the reverse SRVCC handover procedure in the wireless communication system, may include the following three handover scenarios.

Optionally, in a possible implementation manner of the embodiment, before the target 201, the target access network device may further receive a handover message, where the handover message includes indication information, where the indication information is used to indicate The voice service of the terminal is switched to the PS domain.

For example, the handover message may be a message such as a relocation request message, which is not limited in this embodiment.

Specifically, the WCDMA system is taken as an example, the indication information may include one of the following forms: The number of instances of the lu interface is 1 and includes information carried by the CS domain; and the reverse SRVCC switching indication.

Optionally, in a possible implementation manner of this embodiment, after the 201, the target access network device may further receive the container cell sent by the source access network device, where the container cell is Contains the latest configured security domain for the terminal.

Optionally, in a possible implementation manner of the embodiment, the terminal may further generate a key corresponding to the PS domain according to a key corresponding to the CS domain. Specifically, the terminal receives a key derivation parameter (Nonce) sent by the source access network device or the source mobility management device, and then generates a derivation algorithm according to the key derivation parameter and the key corresponding to the CS domain. a key corresponding to the PS domain, and replacing the original key corresponding to the PS domain with the generated key.

In this embodiment, the target access network device determines to perform an operation of switching the voice service of the terminal to the PS domain. If the latest configured security domain of the terminal is a CS domain, the source access network is utilized by the target access network device. The first key sent by the device, processing the SRB of the terminal, or The latest configuration security domain of the terminal is a PS domain, and the SRB of the terminal is processed by the target access network device by using the second key sent by the target mobility management device, because both the terminal and the target mobility management device utilize The key corresponding to the latest configuration security domain of the terminal is processed by the SRB of the terminal. Therefore, the terminal and the target access network device are consistent with the key used by the SRB, and the terminal can be successfully The voice service is switched to the PS domain for bearer, thereby improving the reliability of the handover.

It should be noted that, for the foregoing method embodiments, for the sake of brevity, they are all described as a series of action combinations, but those skilled in the art should understand that the present application is not limited by the described action sequence. Because in accordance with the present application, certain steps may be performed in other orders or concurrently. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

In the above embodiments, the descriptions of the various embodiments are different, and the parts that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

FIG. 3 is a schematic structural diagram of a terminal according to another embodiment of the present application, as shown in FIG. 3. The terminal of this embodiment may include a determining unit 31, a configuring unit 32, and a processing unit 33. The determining unit 31 is configured to determine to perform an operation of switching the voice service of the terminal to the PS domain. The configuration unit 32 is configured to: if the latest configured security domain of the terminal is a CS domain, configure the latest configuration of the terminal. The security domain is configured as a PS domain. The processing unit 33 is configured to process the SRB of the terminal by using a key corresponding to the PS domain.

Specifically, the processing unit 33 uses the key corresponding to the PS domain to the terminal.

The SRB performs processing, and the processing unit 33 may perform encryption processing or decryption processing on the SRB of the terminal by using a key corresponding to the PS domain, or may further use, by the processing unit 33, the PS domain. The key is used to perform integrity protection processing on the SRB of the terminal.

It can be understood that the determining unit 31 determines that the operation of switching the voice service of the terminal to the PS domain, that is, the reverse SRVCC handover procedure in the wireless communication system, may include the following three switching scenarios.

Scenario 2: The latest configuration security domain of the terminal is a CS domain, and the bearer of the terminal may be encapsulated. The established CS domain bearer for carrying the voice service of the terminal and the established PS domain bearer for carrying the PS domain service of the terminal, the voice service of the terminal is to be switched to the PS domain.

Optionally, in a possible implementation manner of this embodiment, as shown in FIG. 4, the terminal in this embodiment may further include a receiving unit 41, configured to receive a handover message or a receiving source sent by the source access network device. a non-access stratum (NAS) message sent by the mobility management device, where the handover message or the NAS message includes indication information, where the indication information is used to indicate that the voice service of the terminal is switched to the PS area.

Optionally, in a possible implementation manner of the embodiment, the processing unit 33 may be further configured to generate a key corresponding to the PS domain according to a key corresponding to the CS domain. Specifically, the processing unit 33 receives a key derivation parameter (Nonce) sent by the source access network device or the source mobility management device, and then uses the derivation according to the key derivation parameter and the key corresponding to the CS domain. The algorithm generates a key corresponding to the PS domain, and replaces the original key corresponding to the PS domain with the generated key.

In this embodiment, the determining unit of the terminal determines to perform an operation of switching the voice service of the terminal to the PS domain. If the latest configured security domain of the terminal is a CS domain, the latest configuration security domain of the terminal is configured by the configuration unit. Setting the PS domain, so that the processing unit can process the SRB of the terminal by using the key corresponding to the PS domain, because the target access network device uses the key corresponding to the PS domain sent by the target mobility management device, Processing the SRB of the terminal, so that the terminal and the target access network device are consistent with the key used by the SRB, and the terminal can be successfully The voice service of the end is switched to the PS domain for bearer, thereby improving the reliability of the handover. FIG. 5 is a schematic structural diagram of a target access network device according to another embodiment of the present application, as shown in FIG. 5. The target access network device of this embodiment may include a determining unit 51 and a processing unit 52. The determining unit 51 is configured to determine to perform an operation of switching a voice service of the terminal to the PS domain, where the processing unit 52 is configured to:

Specifically, the processing unit 52 processes the SRB of the terminal by using the first key sent by the source access network device, and the processing unit 52 may use the first key to the terminal. The SRB performs an encryption process or a decryption process, or may further perform an integrity protection process on the SRB of the terminal by using the first key by the processing unit 52.

Specifically, the processing unit 52 processes the SRB of the terminal by using the second key sent by the target mobility management device, and may use, by the processing unit 52, the SRB of the terminal by using the second key. Encryption processing or decryption processing is performed, or the processing unit 52 may perform integrity protection processing on the SRB of the terminal by using the second key.

It can be understood that the determining unit 51 determines that the operation of switching the voice service of the terminal to the PS domain, that is, the reverse SRVCC handover procedure in the wireless communication system, may include the following three switching scenarios.

Optionally, in a possible implementation manner of this embodiment, as shown in FIG. 6, the embodiment is The target access network device may further include a receiving unit 61, configured to receive a handover message, where the handover message includes indication information, where the indication information is used to indicate that the voice service of the terminal is switched to the PS domain.

Specifically, taking the WCDMA system as an example, the indication information may include one of the following forms:

The number of instances of the lu interface is 1 and contains information carried by the CS domain.

Reverse SRVCC switching indication.

Optionally, in a possible implementation manner of the embodiment, the receiving unit 61 may be further configured to receive a container cell sent by the source access network device, where the container cell includes the terminal The latest configuration security domain.

In this embodiment, the determining unit of the target access network device determines to perform an operation of switching the voice service of the terminal to the PS domain, and if the latest configured security domain of the terminal is the CS domain, the processing unit uses the source access network device to send The first key, the SRB of the terminal is processed, or if the latest configured security domain of the terminal is a PS domain, the processing unit uses the second key sent by the target mobility management device, and the SRB of the terminal Processing, the terminal and the target mobility management device are both processing the SRB of the terminal by using a key corresponding to the latest configured security domain of the terminal, and therefore, the terminal and the target access network device are for SRB. The keys used are consistent, and the voice service of the terminal can be successfully switched to the PS domain for bearer, thereby improving the reliability of the handover.

FIG. 7 is a schematic structural diagram of a terminal according to another embodiment of the present application, as shown in FIG. 7. The terminal of this embodiment may include a memory 71 and a processor 72. The memory 71 is configured to store a program code, the program code includes a computer operation instruction, and the processor 72 executes the program code, and is configured to determine an operation of switching a voice service of the terminal to a PS domain; The latest configuration security domain of the terminal is a CS domain, and the latest configuration security domain of the terminal is set to a PS domain; and the SRB of the terminal is processed by using a key corresponding to the PS domain.

Specifically, the processor 72 processes the SRB of the terminal by using a key corresponding to the PS domain, and the processor 72 may use the key corresponding to the PS domain to the SRB of the terminal. Performing an encryption process or a decryption process, or may also utilize the PS for the processor 72 The key corresponding to the domain performs integrity protection processing on the SRB of the terminal.

It can be understood that the processor 72 determines that the operation of switching the voice service of the terminal to the PS domain, that is, the reverse SRVCC handover procedure in the wireless communication system, may include the following three handover scenarios.

Optionally, in a possible implementation manner of this embodiment, as shown in FIG. 8, the terminal in this embodiment may further include a network interface 81, configured to receive a handover message or a receiving source sent by the source access network device. a non-access stratum (NAS) message sent by the mobility management device, where the handover message or the NAS message includes indication information, where the indication information is used to indicate that the voice service of the terminal is switched to the PS area.

Optionally, in a possible implementation manner of the embodiment, the processor 72 is further configured to generate a key corresponding to the PS domain according to a key corresponding to the CS domain. Specifically, the processor 72 receives a key derivation parameter (Nonce) sent by the source access network device or the source mobility management device, and then utilizes the key derivation parameter and the key corresponding to the CS domain. The derivation algorithm generates a key corresponding to the PS domain, and replaces the original key corresponding to the PS domain with the generated key.

In this embodiment, the processor of the terminal determines to perform an operation of switching the voice service of the terminal to the PS domain. If the latest configured security domain of the terminal is a CS domain, the latest configuration of the terminal is performed by the processor. The security domain is configured as a PS domain, so that the processor can process the SRB of the terminal by using a key corresponding to the PS domain, where the target access network device uses the PS domain corresponding to the target mobility management device. The key is processed by the SRB of the terminal. Therefore, the terminal and the target access network device are consistent with the key used by the SRB, and the voice service of the terminal can be successfully switched to the PS domain for bearer. Thereby improving the reliability of the handover.

FIG. 9 is a schematic structural diagram of a target access network device according to another embodiment of the present application, as shown in FIG. 9. The target access network device of this embodiment may include a memory 91 and a processor 92. The memory 91 is configured to store a program code, the program code includes a computer operation instruction, and the processor 92 executes the program code, and is configured to determine an operation of switching a voice service of the terminal to the PS domain; The latest configuration security domain of the terminal is a CS domain, and the SRB of the terminal is processed by using the first key sent by the source access network device; or if the latest configured security domain of the terminal is the PS domain, the target mobile is used. The second key sent by the management device is processed, and the SRB of the terminal is processed.

Specifically, the processor 92 processes the SRB of the terminal by using the first key sent by the source access network device, and the processor 92 may use the first key to the terminal. The SRB performs encryption processing or decryption processing, or may further perform integrity protection processing on the SRB of the terminal by using the first key by the processor 92.

Specifically, the processor 92 processes the SRB of the terminal by using the second key sent by the target mobility management device, and may use, by the processor 92, the SRB of the terminal by using the second key. Encryption processing or decryption processing is performed, or the processor 92 may perform integrity protection processing on the SRB of the terminal by using the second key.

It can be understood that the processor 92 determines that the operation of switching the voice service of the terminal to the PS domain, that is, the reverse SRVCC handover procedure in the wireless communication system, may include the following three handover scenarios.

Scenario 1: The latest configuration security domain of the terminal is a CS domain, and the established bearer for carrying the voice service of the terminal is a CS domain bearer, and the voice service of the terminal is to be switched to the PS. area.

Optionally, in a possible implementation manner of this embodiment, as shown in FIG. 10, the target access network device in this embodiment may further include a network interface 1001, configured to receive a handover message, where the handover message is The indication information is used to indicate that the voice service of the terminal is switched to the PS domain.

Reverse SRVCC switching indication.

Optionally, in a possible implementation manner of the embodiment, the network interface 1001 is further configured to receive a container cell sent by the source access network device, where the container cell includes the terminal The latest configuration security domain.

In this embodiment, the processor of the target access network device determines to perform an operation of switching the voice service of the terminal to the PS domain. If the latest configured security domain of the terminal is a CS domain, the source access network is utilized by the processor. The first key sent by the device is processed by the SRB of the terminal, or if the latest configured security domain of the terminal is a PS domain, the second key sent by the target mobility management device is used by the processor. The SRB of the terminal performs processing, and the terminal and the target mobility management device both process the SRB of the terminal by using a key corresponding to the latest configured security domain of the terminal, and therefore, the terminal and the target access The network device uses the same key for the SRB, and can successfully switch the voice service of the terminal to the PS domain for bearer, thereby improving the reliability of the handover.

It will be apparent to those skilled in the art that the above description is convenient and concise for the description. For the specific working process of the system, the device and the unit, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute the method of the various embodiments of the present application. Part of the steps. The foregoing storage medium includes: a U disk, a mobile hard disk, a Read-Only Memory (ROM), a random access memory (RAM), a disk or an optical disk, and the like, which can store program codes. .

Finally, it should be noted that the above embodiments are only used to explain the technical solutions of the present application, and are not limited thereto; although the present application is described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently substituted; and the modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

claims

1. A handover processing method in a wireless communication system, characterized by comprising: the terminal determines to perform the operation of switching the terminal's voice service to the packet switching PS domain; if the latest configuration security domain of the terminal is circuit switching CS domain, the terminal sets the latest configured security domain of the terminal to the PS domain;

The terminal uses the key corresponding to the PS domain to process the signaling radio bearer SRB of the terminal.

2. The method according to claim 1, characterized in that, before the terminal determines to perform the operation of switching the voice service of the terminal to the PS domain, it includes:

The terminal receives a switching message or a non-access layer NAS message, and the switching message or the NAS message contains indication information, and the indication information is used to instruct the terminal to switch the voice service to the PS domain.

3. The method according to claim 1 or 2, characterized in that, before the terminal uses the key corresponding to the PS domain to process the SRB of the terminal, it further includes:

The terminal generates the key corresponding to the PS domain based on the key corresponding to the CS domain.

4. A handover processing method in a wireless communication system, characterized by including: the target access network device determines to perform the operation of switching the terminal's voice service to the packet switching PS domain;

If the latest configured security domain of the terminal is a circuit-switched CS domain, the target access network device uses the first key sent by the source access network device to process the signaling radio bearer SRB of the terminal; or

If the latest configured security domain of the terminal is the PS domain, the target access network device uses the second key sent by the target mobility management device to process the SRB of the terminal.

5. The method according to claim 4, characterized in that, before the target access network device determines to perform the operation of switching the terminal's voice service to the PS domain, it includes:

The target access network device receives a switching message, and the switching message includes indication information, and the indication information is used to instruct the terminal's voice service to switch to the PS domain.

6. The method according to claim 4 or 5, characterized in that, after the target access network device determines to perform the operation of switching the terminal's voice service to the PS domain, it further includes:

The target access network device receives the container information element sent by the source access network device, and the container The information element contains the latest configured security domain of the terminal.

7. A terminal, characterized by including:

Determining unit, used to determine to perform the operation of switching the voice service of the terminal to the packet switching PS domain;

A configuration unit configured to set the latest configured security domain of the terminal to the PS domain if the latest configured security domain of the terminal is the circuit-switched CS domain;

A processing unit, configured to use the key corresponding to the PS domain to process the signaling radio bearer SRB of the terminal.

8. The terminal according to claim 7, characterized in that the terminal further includes a receiving unit for

A handover message or a non-access layer NAS message is received, where the handover message or the NAS message contains indication information, and the indication information is used to instruct the terminal's voice service to switch to the PS domain.

9. The terminal according to claim 7 or 8, characterized in that the processing unit is further configured to generate the key corresponding to the PS domain based on the key corresponding to the CS domain.

10. A target access network device, characterized by including:

Determining unit, used to determine and perform the operation of switching the terminal's voice service to the packet switching PS domain;

processing unit for

If the latest configured security domain of the terminal is a circuit-switched CS domain, use the first key sent by the source access network device to process the packet-switched SRB of the terminal; or

If the latest configured security domain of the terminal is the PS domain, use the second key sent by the target mobility management device to process the SRB of the terminal.

11. The target access network equipment according to claim 10, characterized in that the target access network equipment further includes a receiving unit for

Receive a switching message, the switching message includes indication information, and the indication information is used to instruct the terminal's voice service to switch to the PS domain.

12. The target access network device according to claim 11, characterized in that the receiving unit is also used to

Receive a container information element sent by the source access network device, where the container information element contains the latest configured security domain of the terminal.

13. A terminal, characterized in that it includes:

Memory, used to store program code, the program code includes computer operation instructions; Processor, execute the program code, used to determine to perform the operation of switching the voice service of the terminal to the packet switching PS domain; If the The latest configured security domain of the terminal is the circuit-switched CS domain, and the latest configured security domain of the terminal is set to the PS domain; and the packet-switched SRB of the terminal is processed using the key corresponding to the PS domain.

14. The terminal according to claim 13, characterized in that the terminal further includes a network interface for

15. The terminal according to claim 13 or 14, characterized in that the processor is also used to

According to the key corresponding to the CS domain, the key corresponding to the PS domain is generated.

16. A target access network device, characterized by: including:

A memory, used to store program code, the program code including computer operation instructions; A processor, executing the program code, used to determine to perform the operation of switching the terminal's voice service to the packet switching PS domain; and if the terminal The latest configured security domain is the circuit-switched CS domain, and the first key sent by the source access network device is used to process the packet-switched SRB of the terminal; or if the latest configured security domain of the terminal is the PS domain, use The second key sent by the target mobility management device processes the SRB of the terminal.

17. The target access network device according to claim 16, characterized in that the target access network device further includes a network interface for

18. The target access network device according to claim 17, characterized in that the network interface is also used for

Receive the container information element sent by the source access network device, where the container information element contains the latest configured security domain of the terminal.