WO2012051961A1

WO2012051961A1 - Service processing method and device

Info

Publication number: WO2012051961A1
Application number: PCT/CN2011/081098
Authority: WO
Inventors: 张娟
Original assignee: 电信科学技术研究院
Priority date: 2010-10-22
Filing date: 2011-10-21
Publication date: 2012-04-26
Also published as: CN102457926B; CN102457926A

Abstract

A service processing method and device are disclosed. According to the technical solution as put forth in embodiments of the present invention, when a terminal device has an activated high-priority service or is in the process of activating a high-priority service, an eNB determines whether to perform CS fallback processing on a terminal device on the basis of whether an instruction message to perform CS fallback processing transmitted by an MME contains high-priority service information. This prevents high-priority services from being interrupted by routine services, ensures the continuity of high-priority services, and solves the problem of how to prioritize and ensure the processing of high-priority services when a current high-priority service conflicts with a CS domain service request.

Description

The present invention claims the priority of the Chinese Patent Application entitled "Business Processing Method and Apparatus", which is filed on October 22, 2010, the disclosure of which is hereby incorporated by reference. In this application. Technical field

The present invention relates to the field of communications technologies, and in particular, to a service processing method and device. Background technique

The multimedia priority service allows the national security department or emergency reserve department users to use high priority calls over the public network. For this type of service, the transmission of such services is guaranteed even if the network is in a special state, such as a congested state. The users of such services are usually government-authorized individuals, emergency management agencies or other authorized individuals.

The evolved multimedia service supports the priority processing of the IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) service, the priority processing of the EPS (Evolved Packet System) service, and the priority processing of the circuit domain service. For eMPS

(enhancement for Multimedia Priority Service) Calling or called service, the network provides end-to-end priority processing, including NAS

(Non-Access-Stratum, Non-Access Layer) and AS (Access-Stratum, Access Layer) signaling connection establishment procedures and resource allocation procedures for bearers at the core network and the wireless network side.

The emergency bearer service is used to provide an IMS emergency session. The emergency bearer service can be used for a UE (User Equipment) that is normally attached, or can be used for a UE in a restricted mode state. Even if the UE cannot camp on a suitable cell, or the UE does not insert a SIM (Subscriber Identity Module) card, or the UE receives a response message for some location registration (if the indication is "Illegal" When UE"), the UE may still initiate an emergency bearer service.

LTE (Long Time Evolved, Long Term Evolution) system only provides PS (Packet) Switched, packet switched) services, CS (Circuit Switched) services in 2G (2nd Generation, 2nd Generation, 3rd Generation, 3rd Generation, 3rd Generation, 3rd Generation, 3rd Generation, 3rd Generation, Implemented inside. However, for operators that currently have large-scale deployment of 2G/3G networks, they want to protect their existing network investments as much as possible. On the other hand, they also need to consider the needs of existing users for circuit-switched services. Therefore, I hope to support them. The LTE multimode terminal of the circuit switched service can also initiate or receive circuit switched services after accessing the LTE system.

At present, CS Fallback mechanism is introduced in the LTE system for this problem. The essence of CS Fallback is that the multi-mode terminal residing on the LTE network needs to establish a CS domain session, and the network will fall back to the 2G/3G CS domain network. During the entire voice call phase, the UE is always on the CS domain network. After the voice service ends, the UE can return to the LTE network.

After the UE falls back to the CS domain, it can initiate circuit switched services, but the packet switched services activated in the LTE system cannot be maintained in the CS domain. If the terminal and the fallback system can support the packet switching process, when the CS Fallback occurs, the packet switched service bearer activated by the UE in the LTE can be switched to the PS domain network of the fallback system. If the terminal or fallback system does not support the handover process of packet switching, the UE-activated packet switched service will be terminated once the CS Fallback process occurs.

In the process of implementing the present invention, the Applicant has found that the prior art has at least the following problems:

If the UE has activated or is about to activate a high-priority service, if the UE initiates the CS Fallback process, the UE must fall back to the 2G/3G system. If the back-off system does not support the PS handover, the PS service activated by the UE will be terminated after the CS Fallback occurs, and the activated high-priority service will also be terminated, which seriously affects the continuity of the high-priority service. Summary of the invention The invention provides a service processing method and device, which solves the current priority service and

When CS domain service requests conflict, how to prioritize high-priority services.

To achieve the above objective, the present invention provides a service processing method, which is applied to an LTE system, where the method includes:

When the eNB receives the indication message that the MME needs to perform the CS Fallback process, the eNB determines whether the terminal device corresponding to the indication message that needs to perform the CS Fallback process currently has a high priority service activated or activated.

If the terminal device corresponding to the indication message that needs to perform the CS Fallback process currently has a high priority service that is activated or is being activated, the eNB determines whether the high priority indication information exists in the indication message that needs to perform the CS Fallback process. ;

If the indication message that needs to perform the CS Fallback process does not carry the high priority indication information, the eNB determines whether the information is correct according to the information about the target cell reported by the terminal device corresponding to the indication message that needs to be performed by the CS Fallback process. The terminal device performs CS Fallback processing. On the other hand, the present invention further provides an eNB, which is applied to an LTE system, and includes: a communication module, configured to receive an indication message that is sent by an MME and needs to perform a CS Fallback process, and is used to receive the CS Fallback process that needs to be performed. Information indicating a target cell reported by the terminal device corresponding to the message;

a first determining module, configured to: when the communication module receives an indication message that is sent by the MME and needs to perform a CS Fallback process, determine whether the terminal device corresponding to the indication message that needs to perform the CS Fallback process is currently activated or is being activated. High priority business;

a second judging module, configured to: when the judgment result of the first judging module is present, determine whether the indication message that needs to perform CS Fallback processing carries high priority indication information;

a processing module, configured to: when the judgment result of the second judging module is not carried, according to the indication message that is received by the communications module and needs to perform CS Fallback processing The information of the target cell reported by the corresponding terminal device determines whether to perform CS Fallback processing on the terminal device.

Compared with the prior art, the technical solution proposed by the embodiment of the present invention has the following advantages:

By applying the technical solution proposed by the embodiment of the present invention, the eNB can receive the received information according to the high priority service that is activated or is being activated.

Whether the high-priority service information is carried in the indication message of the CS Fallback process sent by the MME, and determining whether the CS Fallback process is performed on the terminal device, thereby preventing the high-priority service from being interrupted due to the normal service, and ensuring the high-priority service. Continuity, how to prioritize the problem of high-priority services when the current priority service conflicts with the CS domain service request. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description For some embodiments of the present invention, other drawings may be obtained from those skilled in the art without departing from the drawings.

FIG. 1 is a schematic flowchart of a service processing method according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of an eNB according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. As described in the background, in the LTE system, high-priority services such as eMPS and IMS emergency call services are introduced, and the network has a higher priority when processing eMPS and IMS emergency services than when the network is in normal operation. When the high-load state or the overload state cannot maintain the connection of the normal service, these high-priority services can still be normally accessed into the network.

In addition, the CS Fallback mechanism is introduced in the LTE system in order for the UE camping on the LTE system to still receive the CS domain service.

After the UE actively initiates or receives the paging of the CS domain, the UE will fall back to the 2G/3G system to receive the circuit domain service. If the network does not support the PS handover process from the source base station to the target base station, after CS Fallback, the UE will release the connection in the LTE cell and reselect to the target cell, and establish a CS domain connection with the target cell. At this time, the UE can only receive the services of the CS domain, but cannot receive the services of the PS domain.

According to the above description, if the UE has an active or active high-priority service, and the UE initiates the service of the CS domain, or receives the call of the CS domain and redirects to the 2G/3G system, the high Priority services will be terminated, affecting the continuity of high priority services.

In order to solve this problem, the embodiment of the present invention provides a high-priority service that is activated or activated by the terminal device corresponding to the received indication message that the eNB performs the CS Fallback process, and needs to be executed. Whether the indication message processed by the CS Fallback is a high-priority service trigger, and determines whether to perform the service processing method of the CS Fallback processing.

As shown in FIG. 1 , a flowchart of a service processing method according to an embodiment of the present invention is applied to an LTE system, where the method specifically includes the following steps:

Step S101: The eNB receives an indication message that is sent by the MME and needs to perform CS Fallback processing.

Step S102: The eNB determines whether the terminal device corresponding to the indication message that needs to perform the CS Fallback process currently has a high priority service that is activated or is being activated.

If the terminal device corresponding to the instruction message that needs to perform the CS Fallback process does not currently have a high priority service that is activated or is being activated, step S105 is performed; If the terminal device corresponding to the indication message that needs to perform the CS Fallback process currently has a high priority service that is activated or is being activated, step S103 is performed.

In a specific application scenario, the specific processing procedure of this step is as follows:

The eNB determines whether the terminal device currently has a high priority service activated or active by using the ARP information corresponding to the terminal device sent by the MME.

In an actual application, the MME sends the corresponding information of the service performed by the eNB to the eNB, where the ARP information of the service corresponding to the terminal device is included, and the common service and the high priority service are used differently. ARP, therefore, the eNB can directly determine, according to the specific content of the ARP information, whether the terminal device currently has a high priority service that has been activated or is being activated.

The ARP information is directly sent by the MME to the eNB when the service status changes or the service needs to be activated. Therefore, after receiving the indication message that the CS Fallback process needs to be performed, the eNB may directly The corresponding ARP information is used to determine whether the terminal device currently has a high priority service that has been activated or is being activated.

Step S103: The eNB determines whether the high-priority indication information is carried in the indication message that needs to perform the CS Fallback processing.

If the result of the judgment is that the indication message that needs to perform the CS Fallback processing carries the high priority indication information, step S105 is performed;

If the result of the determination is that the indication message that needs to perform the CS Fallback processing does not carry the high priority indication information, step S104 is performed.

Step S104: The eNB determines whether to perform CS Fallback processing on the terminal device according to the information of the target cell reported by the terminal device corresponding to the indication message of the CS Fallback process.

In practical applications, the specific processing of this step is as follows:

If the terminal device has a high-priority load that is being established, the network will continue to perform the subsequent operations after the high-priority bearer is established. If the terminal device has established a high-priority bearer, the eNB needs the Instructions for performing CS Fallback processing The information about the target cell reported by the terminal device corresponding to the message determines whether the target cell supports PS handover.

The purpose of the judgment is to determine whether the terminal device can switch the high-priority PS service bearer that has been activated in the LTE to the PS domain network of the fallback system if the CS Fallback process is performed.

If the judgment result is supported, the eNB performs CS Fallback processing on the terminal device according to the indication message of the CS Fallback processing.

If the judgment result is not supported, the eNB refuses to perform CS Fallback processing on the terminal device, so that the high-priority PS service bearer activated or activated in the LTE by the terminal device is not interrupted by the CS Fallback processing.

Step S105: The eNB performs CS Fallback processing on the terminal device according to the indication message that the CS Fallback process is performed.

The high-priority service specifically includes an emergency (emergency) service or an eMPLL (enhanced multi-level precedence and preemption) service in the CS domain.

It should be noted that, for the foregoing step S104, the eNB refuses to perform CS Fallback processing on the terminal device, specifically:

The eNB sends a failure indication message to the MME, and the failure indication message carries the corresponding failure reason indication information, and notifies the MME that the indication of the CS Fallback processing initiated by the MME fails.

The failure reason indication information is specifically the reason information corresponding to the current terminal device having a high priority service and unable to perform CS Fallback processing.

Further, in an actual operation, after the eNB sends a failure indication message to the MME, the following two situations are also included:

Case 1: The triggering reason that the eNB receives the indication message that the MME needs to perform the CS Fallback processing is caused by the service initiated by the terminal device.

The MME sends a Service Reject message to the terminal device, where the Service Reject message carries the corresponding Rejection Reason indication information. In the specific application scenario, the foregoing rejection reason indication information is specifically CS domain temporarily not available information, or reason information corresponding to the current high priority service and unable to perform CS Fallback processing.

The reason information corresponding to the current high-priority service but not the CS Fallback processing may be a preset new cause value information, and the specific content may be set according to actual scene requirements. It does not affect the scope of protection of the present invention.

Case 2: The triggering reason that the eNB receives the indication message sent by the MME that needs to perform the CS Fallback processing is the MT CS Fallback or the MT lxCS Fallback process.

After receiving the failure indication message sent by the eNB and carrying the corresponding failure reason indication information, the MME sends a reject message to the MSC, where the reject message carries the corresponding reject reason indication information, so that the MSC pauses to send the normal CS domain service to the MME. Page request message.

In a specific application scenario, the reject reason indication information is specifically a Mobile terminating CS Fallback call rejected by the user information, or a high priority service exists with the current terminal device, and the CS Fallback process cannot be performed. Corresponding reason information.

It should be further noted that, since the interface between the eNB and the MME is an S1 interface, the indication message that the MME received by the foregoing eNB needs to perform the CS Fallback processing may be implemented as an S1 instruction in an actual application scenario. Such changes in the type of message do not affect the scope of protection of the present invention.

By applying the technical solution proposed by the embodiment of the present invention, the eNB can receive the received information according to the high priority service that is activated or is being activated. Whether the high-priority service information is carried in the indication message of the CS Fallback process sent by the MME, and determining whether the CS Fallback process is performed on the terminal device, thereby preventing the high-priority service from being interrupted due to the normal service, and ensuring the high-priority service. Continuity, how to prioritize the problem of high-priority services when the current priority service conflicts with the CS domain service request. The technical parties set forth in the embodiments of the present invention are described in detail below with reference to specific implementation scenarios.

When the eNB receives the S1 message that is sent by the MME and needs to perform the CS fallback indication, the eNB needs to determine whether the UE corresponding to the CS fallback indication needs to activate or activate the high priority service, such as eMPS service or IMS emergency service.

The eNB can determine whether the UE has a high priority service by using the value of the ARP.

If yes, the eNB further determines whether the CS fallback process is triggered by a high priority service, and according to the corresponding judgment result, the following two situations are included:

Case A: If the SI message does not carry the high priority indication, the eNB may decide whether to initiate the CS Fallback process according to the target cell in the measurement result reported by the UE.

If the target cell supports the PS handover, the eNB continues to perform the CS fallback process. If the target cell does not support the PS handover, the eNB returns a failure message to the MME, and carries a cause value in the failure message to indicate that the MME has a high priority service at this time. The CS domain is temporarily unavailable. After receiving the failure message carrying this indication, the MME returns a service reject message to the UE and carries the cause#39 to indicate "CS domain temporarily not available".

If this is caused by the MT service procedure, the MME also needs to return a paging reject message to the MSC, and indicates "Mobile terminating CS fallback call rejected by the user". Or use the new cause value to inform the MSC that the UE has a high priority PS service CS fallback call that is currently temporarily unavailable. After receiving the new cause, the MSC will suspend the paging request caused by the normal CS service to the MME for a period of time. Case B: If the SI message carries a high priority indication, the eNB continues to perform the CS fallback process.

By applying the technical solution proposed by the embodiment of the present invention, whether the indication message of the CS Fallback processing sent by the eNB is carried by the eNB is high in the case that the terminal device has a high priority service that is activated or is being activated. The priority service information is determined whether the CS Fallback process is performed on the terminal device, so that the high priority service is interrupted due to the normal service, the continuity of the high priority service is ensured, and the current priority service and the CS domain service request are resolved. In the event of a conflict, how to prioritize the problems of high-priority services. In order to implement the technical solution of the present invention, the present invention further provides an eNB, which is applied to an LTE system, and a schematic structural diagram thereof is shown in FIG. 2, and specifically includes:

The communication module 21 is configured to receive an indication message that is sent by the MME and that is required to perform the CS Fallback process, and is used to receive information about the target cell reported by the terminal device corresponding to the indication message that needs to perform the CS Fallback process.

The first judging module 22 is configured to: when the communication module 21 receives the indication message that the MME needs to perform the CS Fallback process, determine whether the terminal device corresponding to the indication message that needs to perform the CS Fallback process currently has an active or active high Priority business.

The second judging module 23 is configured to: when the judgment result of the first judging module 22 is present, determine whether the indication message that needs to perform the CS Fallback processing carries the high priority indication information.

The processing module 24 is configured to determine, according to the information about the target cell reported by the terminal device corresponding to the indication message that the CS Fallback process is required to be performed by the communication module 21, when the determination result of the second determining module 23 is not present. Whether to perform CS Fallback processing on the terminal device. In an actual application, the communication module 21 is further configured to receive ARP information that is sent by the MME and corresponding to each terminal device, and correspondingly, the first determining module 22 is specifically configured to be sent by the MME received by the communication module 21 The ARP information corresponding to the terminal device determines whether the terminal device currently has a high priority service activated or being activated.

In the foregoing processing, the processing module 24 is further configured to: when the first determining module 22 determines that the terminal device does not currently have a high priority service that is activated or is being activated, or when the second determining module 23 determines that the communication module 21 receives When the instruction message that needs to perform the CS Fallback process carries the high priority indication information, the CS Fallback process is performed on the terminal device according to the indication message that the communication module 21 needs to perform the CS Fallback process.

The processing module 24 is specifically configured to determine, according to the information about the target cell reported by the terminal device corresponding to the indication message that the CS Fallback process is required to be performed by the communication module 21, to determine whether the target cell supports the PS handover. The purpose of the determination is to determine whether the terminal device can switch the high-priority PS service bearer that has been activated in the LTE to the PS domain network of the fallback system if the CS Fallback process is performed.

If yes, perform CS Fallback processing on the terminal device according to the indication message that CS Fallback processing is required. If not, determine to refuse to perform CS Fallback processing on the terminal device.

Correspondingly, the communication module 21 is further configured to: when the processing module 24 determines to refuse to perform the CS Fallback processing on the terminal device, send a failure indication message to the MME, where the failure indication message carries corresponding failure reason indication information;

By applying the technical solution proposed by the embodiment of the present invention, whether the indication message of the CS Fallback processing sent by the eNB is carried by the eNB is high in the case that the terminal device has a high priority service that is activated or is being activated. Priority service information, determining whether to perform CS Fallback processing on the terminal device, thereby avoiding high The priority service is interrupted because of the normal service, ensuring the continuity of the high-priority service, and how to prioritize the high-priority service when the current priority service conflicts with the CS domain service request. Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on this understanding, a form of software product is embodied, the computer software product being stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the present invention. The method described in the examples.

A person skilled in the art can understand that the drawings are only a schematic diagram of a preferred embodiment, and the modules or processes in the drawings are not necessarily required to implement the invention.

Those skilled in the art can understand that the modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or may be correspondingly changed in one or more apparatuses different from the embodiment. The modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments. The above disclosure is only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be made by those skilled in the art should fall within the protection scope of the present invention.

Claims

Rights request

A service processing method, which is applied to an LTE system, and the method includes:

If the terminal device corresponding to the indication message that needs to perform the CS Fallback process currently has a high priority service that is activated or is being activated, the eNB determines whether the instruction message that needs to perform the CS Fallback process carries the high priority indication information. If the indication message that needs to perform the CS Fallback process does not carry the high priority indication information, the eNB determines, according to the information about the target cell reported by the terminal device corresponding to the indication message that the CS Fallback process is required to be performed, Perform CS Fallback processing on the terminal device.

The method according to claim 1, wherein the eNB determines whether the terminal device corresponding to the indication message that needs to perform the CS Fallback process currently has a high priority service activated or activated, specifically:

The eNB determines, by the MME, the ARP information corresponding to the terminal device, whether the terminal device currently has a high priority service activated or being activated.

The method according to claim 1, wherein when the eNB receives the indication message that the MME needs to perform the CS Fallback process, the eNB determines the terminal corresponding to the indication message that needs to perform the CS Fallback process. After the device currently has a high priority service that is activated or is being activated, the method further includes:

If the eNB determines that the terminal device does not currently have a high priority service that is activated or is being activated, the eNB performs CS Fallback processing on the terminal device according to the indication message that the CS Fallback process needs to be performed.

The method according to claim 1, wherein the eNB determines whether the indication message that needs to perform the CS Fallback process carries the high priority indication information. Afterwards, the method further includes:

And if the eNB determines that the indication message that needs to perform the CS Fallback process carries the high priority indication information, the eNB performs the CS Fallback process on the terminal device according to the indication message that the CS Fallback process needs to be performed.

The method according to claim 1, wherein the eNB determines that the indication message that needs to perform the CS Fallback process does not carry the high priority indication information, and the eNB performs the CS Fallback processing according to the requirement. And indicating information about the target cell reported by the terminal device corresponding to the message, and determining whether to perform CS Fallback processing on the terminal device, specifically:

Determining, by the eNB, that the target cell supports PS handover according to the information about the target cell reported by the terminal device corresponding to the indication message that is required to perform the CS Fallback process;

If supported, the eNB performs CS Fallback processing on the terminal device according to the indication message that the CS Fallback process needs to be performed;

If not supported, the eNB refuses to perform CS Fallback processing on the terminal device.

The method according to claim 5, wherein the eNB refuses to perform CS Fallback processing on the terminal device, specifically:

The eNB sends a failure indication message to the MME, where the failure indication message carries corresponding failure reason indication information;

The method according to claim 6, wherein the eNB sends a failure indication message to the MME, and after the failure indication message carries the corresponding failure reason indication information, the method further includes:

After the MME receives the failure indication message that is sent by the eNB and carries the corresponding failure reason indication information, the MME sends a Service Reject message to the terminal device, where the Service Reject message carries the corresponding rejection reason indication information. The rejection reason indication information is specifically CS domain temporarily not available Information, or reason information that corresponds to the current high-priority service and cannot perform CS Fallback processing.

When the triggering reason that the eNB receives the indication message that the MME needs to perform the CS Fallback process is triggered by the MT CS Fallback or the lxCS Fallback process, the MME receives the corresponding failure reason indication information sent by the eNB. After the failure indication message, the MSC sends a rejection message to the MSC, where the rejection message carries the corresponding rejection reason indication information, so that the MSC pauses to send the paging request message triggered by the ordinary CS domain service to the MME;

The reason for the rejection reason indication is specifically a mobile terminating CS Fallback call rejected by the user information, or a reason information corresponding to the current terminal device having a high priority service and not being able to perform CS Fallback processing.

An eNB, which is applied to an LTE system, and includes: a communication module, configured to receive an indication message that is sent by the MME and that is required to perform CS Fallback processing, and is used to receive the indication message that needs to perform CS Fallback processing. Information of the target cell reported by the corresponding terminal device;

a processing module, configured to: according to the information about the target cell reported by the terminal device corresponding to the indication message that the CS Fallback process is required to be performed by the communication module, when the judgment result of the second determining module is not carried, Determining whether to set the terminal Prepare for CS Fallback processing.

10. The eNB of claim 9, wherein:

The communication module is further configured to receive ARP information that is sent by the MME and corresponds to each terminal device;

The first determining module is configured to determine, by using the ARP information that is sent by the MME and corresponding to the terminal device, whether the terminal device currently has active or active high Priority business.

11. The eNB of claim 9, wherein:

The processing module is further configured to: when the first determining module determines that the terminal device does not currently have a high priority service that is activated or is being activated, or when the second determining module determines that the communication module receives When the instruction message that needs to perform the CS Fallback process carries the high-priority indication information, the CS Fallback process is performed on the terminal device according to the indication message that the communication module needs to perform the CS Fallback process.

The eNB according to claim 9, wherein the processing module is specifically configured to:

Determining whether the target cell supports PS handover according to the information about the target cell reported by the terminal device corresponding to the indication message that is to be executed by the CS Fallback process;

If yes, perform an CS Fallback process on the terminal device according to the indication message that the CS Fallback process needs to be performed;

If not supported, it is determined to refuse to perform CS Fallback processing on the terminal device.

The eNB according to claim 12, wherein the communication module is further configured to:

When the processing module determines to refuse to perform CS Fallback processing on the terminal device, sending a failure indication message to the MME, where the failure indication message carries corresponding failure reason indication information;