WO2013063764A1

WO2013063764A1 - Separation processing method and serving gateway

Info

Publication number: WO2013063764A1
Application number: PCT/CN2011/081641
Authority: WO
Inventors: 于游洋; 马德曼⋅弗兰克; 陈中平
Original assignee: 华为技术有限公司
Priority date: 2011-11-01
Filing date: 2011-11-01
Publication date: 2013-05-10
Also published as: CN103190188B; CN103190188A

Abstract

Disclosed are a separation processing method and a serving gateway, relating to the technical field of communications. The method includes: a serving gateway learning that a mobility management network element indicates to separate user equipment; if a first timer has timed out, the serving gateway separating the user equipment, wherein the first timer is located on the serving gateway and is used for starting up when the user equipment changes from a connection state to an idle state to time the duration when the user equipment is in an idle state. The method can separate user equipment correctly, avoiding errors of separation of user equipment by the mobility management network element.

Description

Method for processing separation and monthly service gateway

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

Generally, the radio base station is connected to a Mobility Management Entity (MME), and performs control plane signaling of a Service Request (SR); the radio base station is connected to a Serving Gateway (S-GW). The transmission of SR data.

With the development of mobile intelligent terminals, the amount of user data and the number of SRs have increased dramatically. Frequent signaling interactions between the E and the S-GW can result in wasted transmission resources. In order to better serve users, the Sl_Relay network architecture is proposed. Under the network architecture of the Sl_Relay, the control plane signaling of the SR is forwarded to the MME for processing by the S-GW, and some of the SRs can be processed by the S-GW.

In the prior art, a user equipment (UE) is provided with a periodic location update timer, and a mobile reachable timer and an implicit split timer are set on the MN, and the set time of the mobile reachable timer is greater than The set time of the periodic position update timer. When the UE transitions from the connected state to the idle state, the periodic location update timer on the UE and the mobile reachability timer on the MN start simultaneously. When the periodic location update timer on the UE times out, the UE initiates periodicity. Location update. If the UE does not initiate periodic location update due to reasons such as off-net or power failure, the E will initiate an implicit separation timer after the mobile reachable timer expires. If the UE still does not establish a connection with the network side, it is implicitly separated. After the timer expires, the MME will detach the UE.

Under the network architecture of Sl_Relay, the separation of the E-E to the UE may be a false separation, which may result in the UE not being able to accept the network service. Summary of the invention

Embodiments of the present invention provide a method and apparatus for processing separation, which are used to correctly separate UEs under the framework of a Sl_Relay network, so as to avoid erroneous separation of UEs.

In one aspect, an embodiment of the present invention provides a method for processing separation, including: The service gateway learns that the mobility management network element indicates the separation of the user equipment;

If the first timer expires, the serving gateway is separated from the user equipment, where the first timer is located on the serving gateway, and is used to start when the user equipment changes from the connected state to the idle state, and the user equipment is in an idle state. The time is counted.

On the other hand, an embodiment of the present invention further provides a method for processing separation, including:

When the user equipment changes from the connected state to the idle state, the serving gateway starts the first timer, where the first timer is located on the serving gateway, and is used to time the duration of the user equipment in the idle state; when the first timer is over The service gateway starts a second timer, where the second timer is located on the serving gateway, and is used to start when the first timer expires, and time the user equipment continues to be idle after the first timer expires. ;

When the second timer expires, the serving gateway separates the user equipment.

In another aspect, an embodiment of the present invention provides a service gateway, including:

a learning unit, configured to learn that the mobility management network element indicates the separated user equipment;

a first timer, configured to start when the user equipment changes from the connected state to the idle state, and time the user equipment in an idle state;

a processing unit, configured to: after the learning unit learns that the mobility management network element indicates to separate the user equipment, if the first timer expires, the user equipment is separated;

In another aspect, the embodiment of the present invention further provides a service gateway, including:

a second timer, configured to start when the first timer expires, and time the user equipment to continue in an idle state after the first timer expires;

a separating unit, configured to time out the second timer to separate the user equipment;

The method for processing the separation and the service gateway provided by the embodiment of the present invention, by setting a first timer for timing the user equipment to be in an idle state on the serving gateway, because the SR sent by the user equipment is forwarded or processed by the serving gateway, Therefore, the first timer and the periodic location update timer on the user equipment can be kept synchronized, so that the user can be correctly separated according to the state of the first timer. The device avoids the error separation of the user equipment by the mobility management network element. 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 are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic flowchart of a method for processing separation according to an embodiment of the present invention;

FIG. 2 is a schematic flowchart of another method for processing and separating according to an embodiment of the present invention; FIG. 3 is a schematic flowchart of still another method for processing and separating according to an embodiment of the present invention; FIG. FIG. 5 is a schematic flowchart of a method for separating user equipment according to an embodiment of the present invention; FIG. 6 is a schematic flowchart of another method for separating user equipment according to an embodiment of the present invention; A schematic flowchart of a processing method after stopping separating user equipments according to an embodiment of the present invention;

FIG. 8 is a schematic flowchart of another method for processing separation according to an embodiment of the present invention; FIG. 9 is a schematic structural diagram of a service gateway according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of another service gateway according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a separation unit according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of still another service gateway according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of still another service gateway 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, 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 invention without creative efforts are within the scope of the present invention.

In this embodiment of the present invention, the UE may include a mobile UE or a fixed UE, corresponding to the mobile network and the solid. The network has two network architectures, and the present invention does not limit the patent.

An embodiment of the present invention provides a method for processing separation. As shown in FIG. 1, the method may include the following steps:

1 01. The S-GW learns that the MME indicates to separate the UE.

丽 E indicates that the S-GW separates the UE in a variety of ways. For example, when the UE only stores one packet data network (PDN) connection, the MME sends a delete user session message to the S-GW, indicating that the MME indicates that the S-GW separates the UE, and then the MME is deleted. The user session message carries an identifier to indicate the separation of the UE. The specific manner of indicating the separation of the UE is not limited in the embodiment of the present invention.

1 02. If the first timer expires, the S-GW separates the UE.

After the serving gateway learns that the MME indicates the detached UE, it determines that the first timer expires, and then separates the user equipment, where the first timer is located on the S-GW, and is used to time the duration of the UE in an idle state, that is, When the UE transitions from the connected state to the idle state, the first timer is cleared to start timing, and when the UE transitions from the idle state to the connected state, the first timer stops counting. The state of the first timer can be divided into a timeout state and a non-timeout state. The first timer is set with a set duration. When the timing of the first timer exceeds the set duration, the first timer is in a timeout state. The set time of the first timer is greater than the set duration of the periodic location update timer on the UE, and the specific value can be set by the operator according to the specific network condition. Since the SR part sent by the UE is forwarded by the S-GW to the MME for processing, and the part is processed by the S-GW, the first timer on the S-GW can keep synchronized with the periodic position update timer on the UE.

In the prior art, when the UE transitions from the connected state to the idle state, the periodic location update timer on the UE is started simultaneously with the mobile reachable timer on the MN. When the UE initiates the connection request again, for example, the UE has data to transmit, in the S l _Re l ay architecture, part of the SR is processed by the S-GW and is not forwarded to the fixed E. Therefore, the MN cannot know that the UE has changed from the idle state to the connected state at this time, and thus the mobile reachable timer cannot be terminated. When the S-GW processes the SR, the UE turns to the idle state again, and restarts the periodic location update timer. Since the mobile reachable timer on the MN is earlier than the restarted periodic location update timer, when the mobile reachable timer expires, the periodic location update timer does not time out, and the UE does not initiate a periodic location. Update, Li E will mistakenly think that UE is unreachable, enter The implicit separation timer is started. If the UE does not initiate a periodic location update or other connection establishment procedure because the periodic location update timer does not time out before the implicit detach timer expires on the MME, when the implicit detach timer on the MME times out, The MME will erroneously detach the UE.

The method for separating the processing provided by the embodiment of the present invention, by setting a first timer for timing the user equipment to be in an idle state on the serving gateway, because the SR sent by the user equipment is forwarded or processed by the serving gateway, the first The timer can be synchronized with the periodic location update timer on the user equipment. Therefore, the user equipment can be correctly separated according to the state of the first timer, and the error separation of the mobility management network element from the user equipment is avoided.

The embodiment of the present invention further provides a method for processing separation. As shown in FIG. 2, the method includes the following steps:

201. The MME instructs the S-GW to separate the UE.

After the implicit separation timer expires on the E, the E can send an indication message to the S-GW, indicating that the S-GW separates the UE. For example, the MME sends a delete user session message to the S-GW, and the delete user session message carries an identifier to indicate that the S-GW separates the UE. For example, when the UE only stores one packet data network connection, the MME sends a delete user session message to S-GW, instructing the S-GW to separate the UE. In the prior art, the mobile E is provided with a mobile reachable timer and an implicit split timer. When the implicit split timer expires, the MME instructs the S-GW to separate the UE. In the embodiment of the present invention, the MME may also be configured. Only the implicit separation timer is set, and the set duration of the implicit separation timer is greater than the set duration of the periodic location update timer on the UE, and may be greater than the set duration of the first timer on the S-GW. When the UE transitions from the connected state to the idle state, the MME initiates an implicit detach timer. When the implicit timer expires, the MME instructs the S-GW to detach the UE.

202. The S-GW determines whether the first timer expires.

After the S-GW learns that the E is instructed to separate the UE, it is determined whether the first timer is timed out. The first timer is located on the S-GW, and is used when the user equipment changes from the connected state to the idle state, and is in the UE. The duration of the idle state is counted, that is, when the UE transitions from the connected state to the idle state, the first timer is cleared to start timing, and when the UE transitions from the idle state to the connected state, the first timer stops counting. The state of the first timer is divided into a timeout state and a non-timeout state. The first timer is set with a set duration, When the timing of the first timer exceeds the set duration of the first timer, the first timer is in a timeout state, and the set duration of the first timer is greater than the set duration of the periodic location update timer on the UE. The specific value can be set by the operator according to the specific network conditions.

If the first timer expires, execute 203. If the first timer does not time out, execute 204.

203. The S-GW separates the UE.

The timeout of the first timer indicates that the time when the UE transitions from the connected state to the idle state has exceeded the set duration of the first timer. It can be considered that the indication of the detached UE is the correct separation indication. Is separated.

204. The S-GW stops separating the UE.

The first timer does not time out, indicating that the time when the UE transitions from the connected state to the idle state has not exceeded the set duration of the first timer, and the indication that the MME is separated from the UE is considered to be an incorrect separation indication, and the UE is not off the network at this time. It does not need to be separated, so the S-GW stops separating the UEs, that is, the S-GW does not separate the UEs.

In 203, after the implicit separation timer of the mobility management network element and the first timer of the serving gateway are simultaneously in the timeout state, the UE is immediately separated. The UE may still initiate a connection with the network side. The immediate separation of the UE is not conducive to the UE to restore the connection with the network side. Therefore, a buffer duration may be set according to network conditions and actual operational experience to implement delay separation of the UE.

As an example, the delay separation UE can be implemented by setting a preset off-network duration, and the preset off-network duration is equal to the buffer duration. As shown in FIG. 3, after 202, if the first timer expires, step 2021 is performed.

The S-GW determines whether the actual off-network duration of the UE exceeds a preset off-network duration.

The actual off-network duration of the UE is the length of time from the first timer timeout to the time that the serving gateway learns that the mobility management network element indicates the separation of the user equipment.

If the actual off-network duration of the UE exceeds the preset off-network duration, step 203 is performed; if the actual off-network duration of the UE does not exceed the preset off-network duration, step 204 is performed.

The actual off-network duration of the UE exceeds the preset off-network duration, indicating that the UE still does not initiate a connection with the network side within the buffer duration after the first timer expires, and may be considered that the UE has left the network, and the indication of the UE is separated from the network. For the correct separation indication, the UE needs to be separated. The actual off-network duration of the UE does not exceed The preset off-network duration indicates that the UE still has a certain buffering duration after the first timer expires, and does not need to immediately separate the UE. The indication of the solid E-separating UE may be considered as an erroneous separation indication.

As an example, the delay separation UE can also be implemented by setting a second timer. The second timer is located on the S-GW. Similar to the first timer, since part of the SR of the UE is processed by the S-GW and the other part is forwarded by the S-GW to the MME for processing, the S-GW can accurately learn the transition of the UE connection status. The second timer is started when the first timer expires, and is used to time the duration that the UE continues to be idle after the first timer expires, that is, after the first timer expires, the connection state of the UE does not change. Time is still in the idle state. When the first timer expires, the second timer is cleared to start timing, and when the UE transitions from the idle state to the connected state, the second timer stops counting. The status of the second timer can be divided into a timeout state and a non-timeout state. The second timer is configured with a preset duration, where the preset duration of the second timer is equal to the buffer duration, and when the timing of the second timer exceeds the preset duration on the second timer, the second timer When the timeout period of the second timer does not exceed the preset duration on the second timer, the second timer is in the non-timeout state. As shown in FIG. 4, after 202, if the first timer expires, step 2022 is performed.

2022: The S-GW determines whether the second timer expires.

If the second timer expires, step 203 is performed, and if the second timer does not time out, the step is performed.

204.

The timeout of the second timer indicates that the UE does not initiate the connection on the network side within the buffering time after the first timer expires. The UE may be considered to be off the network, and the indication that the MME is separated from the UE is a correct separation indication. If the second timer does not time out, it indicates that the UE still has a certain buffer duration after the first timer expires, and does not need to immediately separate the UE. It can be considered that the indication of the detached UE is an erroneous separation indication.

In addition, if the MME does not instruct the S-GW to separate the UE in the idle state, the S-GW may perform the operation of separating the UE by itself when the second timer expires, without waiting for the separate UE of the E-E Instructions.

In step 203, the S-GW separate UE may also have multiple implementation manners.

As an example, the S-GW may notify the mobility management network element to initiate the user equipment to the user equipment. The separation process is implemented to achieve separation for the UE, as shown in Figure 5:

301. The S-GW sends a separate user equipment indication to the MN.

The S-GW judges by the method shown in FIG. 2, FIG. 3 or FIG. 4, and determines that the user equipment is to be separated, and sends a separate user equipment indication to the MN, indicating that the LG separates the user equipment. For example, the service gateway sends a detach request message (De t a ch Reque s t ) to the MME, where the detachment request message carries the user equipment identifier to be separated, and may also carry the cause of the separation of the user equipment.

302. 丽 E initiates a separation process of user equipment.

After receiving the delete session response sent by the S-GW, the MN initiates a user equipment separation process. As an example, the initiating user equipment separation process may be: 丽 E sends a delete session request to the S-GW; the S-GW sends a delete session request to the P-GW; the P-GW notifies the PCRF to delete the user session information; the P-GW sends The session response is deleted to the S-GW; the S-GW sends a delete session response to the MN. If the Idle mode reduction (ISR) mechanism in the idle mode is active, the MME also needs to notify the Serving GPRS Support Node (SGSN) to initiate the separation process of the user equipment.

As an example, the S-GW may also send a delete user session request to a Packet Data Network Gateway (P-GW) to enable the P-GW to notify the Policy and Charging Rules Function (Policy and Charging Rules Function). The PCRF deletes the session information of the user equipment, and the S-GW notifies the UE to delete the bearer information of the UE, so as to implement separation for the UE. As shown in Figure 6:

401. The S-GW sends a delete session request to the P-GW.

The deletion session request message sent by the S-GW to the P-GW includes the session identifier to be deleted, and the to-be-deleted session identifier indicates that all bearer resources of the to-be-deleted session are to be translated and the session information of the session to be deleted is deleted. If the P-GW subscribes to the location information of the UE, the S-GW also needs to carry the location information of the UE in the deletion session request. If the time zone in which the UE is located changes, the time zone information of the UE needs to be carried in the deletion session request.

402. The P-GW sends a delete session response to the S-GW.

403. The P-GW notifies the PCRF to delete the session information of the UE. 404. The S-GW sends a delete bearer request to the MME.

The delete bearer request sent by the S-GW carries the bearer identifier to be deleted and the deletion cause value and other parameters. After all the bearer resources of the user equipment are translated, the MME deletes the context information of the user equipment.

405. The MN sends a delete bearer response to the S-GW.

At this point, the UE is separated. If the user equipment is also registered at the SGSN, the S-GW also needs to notify the SGSN to delete the bearer information of the UE.

As an example, the S-GW can also directly separate the UEs. For example, after receiving the delete session request sent by the solid E, the S-GW determines that the UE needs to be separated, and the S-GW sends a delete session request to the P-GW; the P-GW notifies the PCRF to delete the session information of the UE; and the P-GW sends the delete session. Respond to the S-GW; the S-GW sends a delete session response to the fixed E. If the ISR mechanism is active, the SGSN also needs to inform the SGSN to initiate the user equipment separation process.

After the S-GW of the step 204 stops the separation of the UE, the S-GW may further notify the UE to instruct to separate the user equipment after a certain time interval. The time interval may be the set duration of the implicit separation timer on the MN E, or the duration of the implicit separation timer set on the MN E minus the last idle duration of the UE, and the last idle duration of the UE. In order to change from the UE to the idle state to the S-GW, the length of time between the MME indicating the separation of the UEs may be other duration values.

As an example, the S-GW notifies the MME to indicate that the separated UE can be implemented by restarting the implicit separation timer of the MN after a certain time interval, as shown in FIG. 7:

501. The MME sends a delete session request to the S-GW.

The implicit detachment timer on the MN is timed out, and the deletion session request is sent to the S-GW, indicating that the S-GW is separated from the user equipment, where the deletion session request carries the identification information of the session to be deleted.

502. The S-GW sends a delete session response to the MME.

The S-GW judges by the method shown in Fig. 2, Fig. 3 or Fig. 4, and judges that when the separation of the user equipment is stopped, the deletion session response is sent to the MN.

The deletion session response may carry a rejection separation indication, which is used to indicate that the S-GW rejects the separation of the UE; the deletion session response may also carry a duration value, for example, the duration value may be an implicit separation timer set on the MN The delay length minus the last idle time of the UE, or it can be fixed The duration of the last idle time of the UE is the length of time from when the UE transitions to the idle state until the S-GW learns that the MME indicates the separation of the UE.

503, 丽 E restarts the implicit separation timer.

After receiving the delete session response sent by the S-GW, if the deletion session response carries the reject separation indication, the solid E retains the context information of the UE, that is, maintains the registration status of the UE in the network, and the E-restart implicit Separate the timer. After the implicit separation timer expires, the E will send a delete user session request to the S-GW to instruct the S-GW to separate the UE. If the deletion session carries the duration value, the E-E Before the implicit separation timer is restarted, the set duration of the implicit separation timer is modified to modify the duration value carried in the session response.

It should be emphasized that, in the method for separating the processing provided by the embodiment of the present invention, a timer is added to the S-GW, so the paging mode and the procedure for the UE are different from the prior art, and the specific process is Next:

The triggering event of the paging may include, but is not limited to, the UE registering at the same time in the packet domain and the circuit domain, and the MME moves the switching center from the circuit domain (when the implicit separation timer is started but not timed out). The Mob i le Swi tching Center, MSC) receives the paging user indication; or the MME receives the deletion location information message sent by the Home Subscr iber Sever (HSS), and the deletion type is set to the user subscription data discarding. .

The MN sends a paging message to the S-GW attached to the UE, where the paging message carries parameters such as the identity of the UE and the location location identifier of the paging.

The S-GW decides whether to forward the paging message to the target radio base station based on the UE status.

For the UE in the idle state, after the S-GW receives the paging message sent by the MME, the processing scheme may include, for example:

1) When the first timer on the S-GW does not time out, the S-GW forwards the paging message to the target radio base station. The manner in which the target radio base station is selected may be, but is not limited to, based on the paging location area identifier or based on the target radio base station IP address in the paging message.

After the paging message is forwarded by the S-GW, a paging response timer is set for the paging UE. Before the paging response timer expires, when the UE transitions from the idle state to the connected state, the S-GW needs to notify the E-E. deal with. 2) When the first timer on the S-GW times out, the S-GW directly replies to the paging reject message (Pag ing Rej ec t ) to the MME. The page rejection message includes a message type, a user identifier, and a cause value. Since the paging failure caused by the first timer expires, the cause value in the paging reject message may be set to be unreachable by the user. In addition, if the S-GW receives the downlink data packet sent to the UE, the downlink data notification message is not sent to the MN 8. If the S-GW receives a control plane message such as a dedicated bearer setup message or a proprietary bearer modification sent by the P-GW, the S-GW does not notify the MME, but directly replies to the P-GW. After receiving the paging rejection message, the MN found that the user is unreachable and will not send the paging message later.

The embodiment of the present invention further provides a method for processing separation. As shown in FIG. 8, the method includes the following steps:

601. When the UE transitions from the connected state to the idle state, the S-GW starts the first timer.

The first timer is located on the S-GW, and is used to start when the user equipment changes from the connected state to the idle state, and time the UE in an idle state, that is, when the UE changes from the connected state to the idle state, The first timer is cleared to start timing, and when the UE transitions from the idle state to the connected state, the first timer stops counting. The state of the first timer is divided into a timeout state and a non-timeout state. The first timer is set with a set duration. When the timer duration of the first timer exceeds the set duration of the first timer, the first timer is in a timeout state, and the set duration of the first timer is greater than The set duration of the periodic location update timer on the UE, and the specific value can be set by the operator according to the specific network condition.

602. When the first timer expires, the S-GW starts the second timer.

The second timer is located on the S-GW. The second timer is started when the first timer expires, and is used to time the duration that the UE continues to be idle after the first timer expires, that is, after the first timer expires, the connection state of the UE does not change. Time is still in the idle state. When the UE transitions from the idle state to the connected state, the second timer stops counting. Second timer Status can be divided into timeout status and no timeout status. The second timer is set with a preset duration. When the timing of the second timer exceeds the preset duration on the second timer, the second timer is in a timeout state.

603. When the second timer expires, the S-GW separates the UE.

The method for separating the UE by the S-GW may refer to the method shown in FIG. 5 or FIG. 6.

The difference between the embodiment of the present invention and the prior art solution is that the mobile reachable timer and the implicit split timer are set on the MN in the prior art, and the first timer and the second timer in the embodiment of the present invention. The devices are all set on the S-GW, which replaces the role of the mobile reachable timer and the implicit split timer on the MN. Since the SR sent by the user equipment is forwarded or processed by the serving gateway, the serving gateway can know the connection status of the UE in time, and the UE is separated by the first timer and the second timer located on the S-GW, which avoids The error is separated from the user equipment by the mobility management network element.

The embodiment of the present invention further provides a service gateway, which can be used to execute the method shown in FIG. 1 to FIG. As shown in Figure 9, the service gateway includes:

The learning unit 701 is configured to learn that the mobility management network element indicates the separated user equipment.

For example, the learning unit 701 can receive the deleted user session message sent by the MN, and the deleted user session message carries the identifier used to indicate the detached UE. For example, the learning unit 701 can receive the deleted user session message sent by the MN, and according to the deleted user. Whether the session requested to be deleted by the session message is a session of the packet data network connection that the UE only stores to determine whether the solid E indicates a separate UE. Those of ordinary skill in the art will appreciate that unit 701 can be implemented by a receiver, a receiving circuit, a general purpose interface circuit, a dedicated interface circuit, or software.

The first timer 702 is configured to start when the user equipment changes from the connected state to the idle state, and counts the duration of the user equipment in the idle state.

The timing of the first timer 702 for timing the user equipment in the idle state means that when the UE transitions from the connected state to the idle state, the first timer 702 is cleared to start timing, when the UE changes from the idle state to the connected state. The first timer 702 stops counting. The state of the first timer 702 can be divided into a timeout state and a non-timeout state. The first timer 702 is provided with a set duration. When the timer duration of the first timer 702 exceeds the set duration, the first timer 702 is in a timeout state. First timer 702 The set duration is greater than the set duration of the periodic location update timer on the UE, and the specific value can be set by the operator according to the specific network condition. Since the SR part sent by the UE is forwarded by the S-GW to the MME for processing and partially processed by the S-GW, the first timer 702 on the S-GW can keep synchronized with the periodic location update timer on the UE. One of ordinary skill in the art will appreciate that the first timer 702 can be implemented by a clock circuit, a crystal oscillator circuit, a dedicated chip, or software.

The processing unit 703 is configured to: after the learning unit 701 learns that the mobility management network element indicates the separation of the user equipment, if the first timer 702 times out, the user equipment is separated. At this time, the processing unit 703 may be further configured to stop the separation of the user equipment if the first timer 702 does not time out after the learning unit 701 learns that the mobility management network element indicates the separation of the user equipment. As known to those skilled in the art, the processing unit 703 can be implemented by a general purpose chip, a dedicated chip, or software.

Optionally, the processing unit 703 is specifically configured to: after the learning unit 701 learns that the mobility management network element indicates the separation of the user equipment, if the first timer 702 times out, and the actual off-network duration of the user equipment exceeds the preset off-network The user equipment is separated from the user equipment. The actual off-network duration of the user equipment is the length of time from the first timer 702 timeout to the time that the service gateway learns that the mobility management network element indicates the separation of the user equipment. At this time, the processing unit 703 is further configured to: after the learning unit 701 learns that the mobility management network element indicates the separation of the user equipment, if the first timer 702 times out, and the actual off-network duration of the user equipment does not exceed the preset off-network duration , Stop separating user devices.

As shown in FIG. 10, the serving gateway may further include a second timer 704, configured to start when the first timer 702 times out, and time the user equipment to continue to be in an idle state after the first timer 702 expires, that is, For the period of time after the first timer 702 times out, the connection state of the UE does not change and is still in the idle state. When the first timer 702 times out, the second timer 704 is cleared to start timing, and when the UE transitions from the idle state to the connected state, the second timer 704 stops counting. The state of the second timer 705 can be divided into a timeout state and a non-timeout state. The second timer 704 is configured with a preset duration, where the preset duration of the second timer 704 is equal to the buffer duration, and when the timer duration of the second timer 704 exceeds the preset duration on the second timer 704, The second timer 704 is in a timeout state. When the time duration of the second timer 704 does not exceed the preset duration on the second timer 704, the second timer 704 is in an untimed state. The second timer 704 is included in the serving gateway The processing unit 703 may be specifically configured to: after the learning unit 701 learns that the mobility management network element indicates to separate the user equipment, if the first timer 702 times out, and the second timer 704 times out, the user equipment is separated. At this time, the processing unit 703 may be further configured to: after the learning unit 701 learns that the mobility management network element indicates to separate the user equipment, if the first timer 702 times out, and the second timer 704 does not time out, stop separating the user equipment. . Those skilled in the art will appreciate that the second timer 704 can be implemented by a clock circuit, a crystal oscillator circuit, a dedicated chip, or software.

As shown in FIG. 11, the processing unit 703 may further include a first notification deletion unit 7031 and a second notification deletion unit 7032. a first notification deleting unit 7031, configured to send a delete user session request to the packet data network gateway, so that the packet data network gateway notifies the policy and charging rule function entity to delete the session information of the user equipment; and the second notification deleting unit 7032 is configured to: The mobility management network element is notified to delete the bearer information of the user equipment.

In addition, the processing unit 703 may include a notification initiating unit, configured to notify the mobility management network element to initiate a user equipment separation procedure for the user equipment.

In addition, as shown in FIG. 12, the service gateway may further include a notification indication separation unit 705, configured to notify the mobility management network element to indicate the separation of the user equipment after a certain time interval after the processing unit 703 stops separating the user equipment, for a certain period of time. The interval is the set duration of the implicit separation timer of the mobility management network element, or the duration of the implicit separation timer set by the mobility management network element minus the latest idle time of the user equipment, and the latest idleness of the user equipment. The duration is from the transition of the user equipment to the idle state to the time that the serving gateway knows that the mobility management network element indicates the separation of the user equipment. In the scenario where the serving gateway includes the second timer 704, the serving gateway may also include a notification indication separation unit 705. In this scenario, after the processing unit 703 stops separating the user equipment, the notification indication separation unit 705 notifies the mobility management network element that The user equipment is separated after a certain time interval. As will be appreciated by those skilled in the art, the notification indicating separation unit 705 can be implemented by a transmitting circuit, a general purpose chip, a dedicated chip, or software.

The service gateway provided by the embodiment of the present invention provides a first timer for timing the user equipment in an idle state. The first timer and the user equipment are used because the SR sent by the user equipment is forwarded or processed by the serving gateway. The periodic location update timer can be kept in sync, so According to the state of the first timer, the user equipment can be correctly separated, and the error separation of the mobility management network element from the user equipment is avoided.

The embodiment of the present invention further provides a service gateway, which can be used to perform the method shown in FIG. 6. As shown in Figure 13, the service gateway includes:

The first timer 801 is configured to start when the user equipment changes from the connected state to the idle state, and time the user device in the idle state.

The first timer 801 is configured to time the user equipment in an idle state. When the UE transitions from the connected state to the idle state, the first timer 801 is cleared to start timing, and when the UE changes from the idle state to the connection. In the state, the first timer 801 stops counting. The state of the first timer 801 can be divided into a timeout state and an untimeout state. The first timer 801 is provided with a set duration. When the timer duration of the first timer 801 exceeds the set duration, the first timer 801 is in a timeout state. The set duration of the first timer 801 is greater than the set duration of the periodic location update timer on the UE, and the specific value can be set by the operator according to the specific network condition. Since the SR part sent by the UE is forwarded by the S-GW to the MME for processing and partly processed by the S-GW, the first timer 801 on the S-GW can keep synchronized with the periodic location update timer on the UE. Those skilled in the art will appreciate that the first timer 801 can be implemented by a clock circuit, a crystal oscillator circuit, a dedicated chip, or software.

The second timer 802 is configured to start when the first timer 801 times out, and time the user equipment to continue in the idle state after the first timer 801 times out.

The second timer 802 counts the duration that the user equipment continues to be in the idle state after the first timer 801 times out. When the first timer 801 times out, the second timer 802 clears the start timing, when the UE is idle. When the state transitions to the connected state, the second timer 802 stops counting. The state of the second timer 802 can be divided into a timeout state and a non-timeout state. The second timer 802 is provided with a preset duration. When the timing of the second timer 802 exceeds the preset duration on the second timer 802, the second timer 802 is in a timeout state. Those skilled in the art will appreciate that the second timer 802 can be implemented by a clock circuit, a crystal oscillator circuit, a dedicated chip, or software.

The separating unit 803 is configured to time out the second timer 802 to separate the user equipment.

A person skilled in the art may know that the processing unit 803 can pass a general-purpose chip and a dedicated chip. Or software to achieve.

Further, the separation unit 803 may include a first notification deletion unit and a second notification deletion unit. a first notification deleting unit, configured to send a delete user session request to the packet data network gateway, so that the packet data network gateway notifies the policy and charging rule function entity to delete the session information of the user equipment; and the second notification deleting unit is configured to notify the mobile The sex management NE deletes the bearer information of the user equipment.

Further, the separating unit 803 may further include a notification initiating unit, configured to notify the mobility management network element to initiate a user equipment separation procedure for the user equipment.

Those skilled in the art will appreciate that information and signals can be represented using any technical techniques, such as data, data, instructions, commands, information, signals. The bits, symbols and chips may pass voltage, current, electromagnetic waves, magnetic fields or magnet ic particles, light fields or optical particles, or any combination of the above.

Those skilled in the art will also appreciate the various illustrative logical units listed in the embodiments of the present invention.

The singular logical unit and step can be implemented by electronic hardware, computer software, or a combination of both. To clearly demonstrate the interchangeability of hardware and software

(interchangeabi 1 i ty ), the various illustrative components and steps described above have generally described their function. Whether such functionality is implemented by hardware or software depends on the design requirements of the particular application and the overall system. A person skilled in the art can implement the described functions using various methods for each specific application, but such implementation should not be construed as being beyond the scope of the embodiments of the present invention.

The various illustrative logic units and circuits described in the embodiments of the present invention may be used in common places. Processor, digital signal processor, application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of the above to implement or operate The function described. The general purpose processor may be a microprocessor, which may alternatively be any conventional processor, controller, microcontroller or state machine. The processor may also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration. achieve.

The steps of the method or algorithm described in the embodiments of the present invention may be directly embedded in hardware, a software module executed by a processor, or a combination of the two. The software modules can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium in the art. Illustratively, the storage medium can be coupled to the processor such that the processor can read information from the storage medium and can write information to the storage medium. Alternatively, the storage medium can also be integrated into the processor. The processor and the storage medium can be disposed in an ASIC, and the ASIC can be disposed in the user terminal. Alternatively, the processor and the storage medium may also be provided in different components in the user terminal.

In one or more exemplary designs, the above-described functions described in the embodiments of the present invention may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, these functions can be stored on a computer readable medium or transmitted in a form of one or more instructions or code to a computer readable medium. Computer readable media includes computer storage media and communication media that facilitates the transfer of computer programs from one place to another. The storage medium can be any available media that can be accessed by any general or special computer. For example, such computer readable media can include, but is not limited to, RAM,

ROM, EEPR0M, CD-ROM or other optical disc storage, disk storage or other magnetic storage device, or anything else that can be used to carry or store instructions or data structures and other programs that can be read by general or special computers, or general or special processors. Take the medium of the form of the program code. In addition, any connection can be appropriately defined as a computer readable medium, for example, if the software is from a website site, server or other remote resource through a coaxial cable, fiber optic computer, twisted pair, digital subscriber line (DSL) Or wirelessly transmitted, such as infrared, wireless, and microwave, is also included in the defined computer readable medium. In the middle. The discs (di sk ) and disks (di sc ) include compact discs, laser discs, optical discs, DVDs, floppy discs, and Blu-ray discs. Disks typically replicate data magnetically, while discs typically optically replicate data with a laser. Combinations of the above may also be included in a computer readable medium. The contents of the present disclosure, any modifications based on the disclosure, should be considered as obvious in the art, and the basic principles described herein may be applied to other variations without departing from the spirit and scope of the invention. Therefore, the present disclosure is not limited to the described embodiments and designs, but may be extended to the maximum extent consistent with the principles of the invention and the novel features disclosed.

Claims

Claim

A method for processing separation, characterized in that it comprises:

The service gateway learns that the mobility management network element indicates the separation of the user equipment;

If the first timer expires, the serving gateway separates the user equipment, where the first timer is located on the serving gateway, and is used to start when the user equipment changes from a connected state to an idle state. And time counting the duration in which the user equipment is in an idle state.

2. The method according to claim 1, wherein the method further comprises: if the first timer does not time out, the serving gateway stops separating the user equipment.

The method according to claim 1, wherein, if the first timer expires, the serving gateway separates the user equipment, specifically:

If the first timer expires, and the actual off-network duration of the user equipment exceeds a preset off-network duration, the serving gateway separates the user equipment, where the actual off-network duration of the user equipment is The first timer expires until the serving gateway learns the length of time between the mobility management network element indicating that the user equipment is separated.

4. The method of claim 3, wherein the method further comprises:

If the first timer expires, and the actual off-network duration of the user equipment does not exceed the preset off-network duration, the serving gateway stops separating the user equipment.

If the first timer expires and the second timer expires, the serving gateway separates the user equipment, where the second timer is located on the serving gateway, and is used in the first timer. The timeout is started, and the user equipment is timed to continue to be in an idle state after the first timer expires.

The method of claim 5, wherein the method further comprises:

If the first timer expires and the second timer does not time out, the serving gateway stops separating the user equipment.

7. The method of claim 1, 3 or 5, wherein the service gateway is separated User equipment, including:

The serving gateway sends a delete user session request to the packet data network gateway, so that the packet data network gateway notifies the policy and charging rule function entity to delete the session information of the user equipment;

The serving gateway notifies the mobility management network element to delete bearer information of the user equipment.

The method according to claim 1, 3 or 5, wherein the separating the user equipment by the service gateway comprises:

The serving gateway notifies the mobility management network element to initiate a user equipment separation procedure for the user equipment.

The method of claim 2, 4 or 6, wherein, after the serving gateway stops separating the user equipment, the method further includes:

The service gateway notifies the mobility management network element to instruct to separate the user equipment after a certain time interval, where the certain time interval is a set duration of the implicit separation timer of the mobility management network element, or Setting a duration of the implicit separation timer of the mobility management network element minus the last idle duration of the user equipment, and the last idle duration of the user equipment is from the user equipment to the idle state to the location The serving gateway learns the length of time between the mobility management network element indicating the separation of the user equipment.

10. A method of processing separation, characterized by comprising:

When the user equipment is switched from the connected state to the idle state, the serving gateway starts the first timer, where the first timer is located on the serving gateway, and is used to time the duration of the user equipment being in an idle state;

When the first timer expires, the serving gateway starts a second timer, where the second timer is located on the serving gateway, and is used to start when the first timer expires. Determining, by the user equipment, the duration of the idle state after the first timer expires;

The method of claim 10, wherein the separating the user equipment by the serving gateway comprises:

The serving gateway notifies the mobility management network element to initiate a separate separation of the user equipment from the user equipment Cheng.

1 3, a service gateway, characterized in that:

a first timer, configured to start when the user equipment changes from a connected state to an idle state, and time the user device in an idle state;

The processing unit is configured to: after the learning unit learns that the mobility management network element indicates to separate the user equipment, if the first timer expires, the user equipment is separated.

14. The service gateway of claim 13 wherein:

The processing unit is further configured to stop separating the user equipment if the first timer does not time out.

15. The service gateway of claim 13 wherein:

The processing unit is specifically configured to: after the learning unit learns that the mobility management network element indicates that the user equipment is separated, if the first timer expires, and the actual off-network duration of the user equipment exceeds Separating the user equipment, the actual off-network duration of the user equipment is from the first timer timeout to the service gateway learning that the mobility management network element indicates separation The length of time between user devices.

16. The service gateway of claim 15 wherein:

The processing unit is further configured to: after the learning unit learns that the mobility management network element indicates to separate the user equipment, if the first timer expires, and the actual off-network duration of the user equipment is not Exceeding the preset off-network duration, stopping separating the user equipment.

17. The service gateway of claim 13 wherein:

The serving gateway further includes a second timer, configured to start when the first timer expires, The user equipment is timed to continue to be in an idle state after the first timer expires; the processing unit is configured to: in the learning unit, learn that the mobility management network element indicates to separate the user equipment After the first timer expires and the second timer expires, the user equipment is separated.

18. The service gateway of claim 17 wherein:

The processing unit is further configured to: after the learning unit learns that the mobility management network element indicates to separate the user equipment, if the first timer expires, and the second timer does not time out, stop Separating the user equipment.

The service gateway according to claim 13, wherein the processing unit comprises:

a first notification deleting unit, configured to send a delete user session request to the packet data network gateway, so that the packet data network gateway notifies the policy and charging rule function entity to delete the session information of the user equipment;

And a second notification deleting unit, configured to notify the mobility management network element to delete the bearer information of the user equipment.

The service gateway according to any one of claims 1 to 3, wherein the processing unit comprises:

The notification initiating unit is configured to notify the mobility management network element to initiate a user equipment separation process for the user equipment.

The service gateway according to claim 14, 16 or 18, wherein the service gateway further comprises: a notification indicating separation unit, configured to notify the processing unit after the processing unit stops separating the user equipment The mobility management network element instructs to separate the user equipment after a certain time interval, where the certain time interval is the set duration of the implicit separation timer of the mobility management network element, or is the mobility management network. The implicit separation timer of the element is set to subtract the last idle time of the user equipment, and the last idle time of the user equipment is changed from the user equipment to the idle state until the service gateway learns the The mobility management network element indicates the length of time between the separation of the user equipments.

22. A service gateway, comprising:

a first timer, configured to start when the user equipment changes from the connected state to the idle state, and time the user device in an idle state;

a second timer, configured to start when the first timer expires, and time the user equipment to continue to be in an idle state after the first timer expires;

a separating unit, configured to time out the second timer to separate the user equipment.

The service gateway according to claim 22, wherein the separating unit comprises: a notification initiating unit, configured to notify the mobility management network element to initiate a user equipment separation procedure to the user equipment.

The service gateway according to claim 22, wherein the separating unit comprises: a first notification deleting unit, configured to send and delete a user session request to the packet data network gateway, so that the packet data network gateway notifies The policy and charging rule function entity deletes session information of the user equipment;