CN102238574A - User state change notification method and system - Google Patents
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Abstract
The invention discloses a user state change notification method. The method comprises the following steps of: when a wireless side network element monitors a user state change, notifying the user state change to a data distribution gateway; or when a network element of a core network monitors the user state change, notifying the user state change to the data distribution gateway. The invention also discloses a user state change notification system. A notification unit in the system is used for notifying the user state change to the data distribution gateway when the wireless side network element monitors the user state change, or notifying the user state change to the data distribution gateway when the network element of the core network monitors the user state change. By the method and the system provided by the invention, the data distribution gateway can be ensured to timely sense the current user state of a user, thereby conveniently realizing the selection of extended tunnel enabling.
Description
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a method and a system for notifying a user of a change in a state when a local access function is turned on.
Background
With the continuous increase of the air interface rate and the increase of data users, the data volume of future users will show explosive increase, which inevitably will cause impact on the existing core network, and the existing core network element has to be expanded to provide satisfactory service for users. Considering that most of the growing data is caused by Internet (Internet) services, mobile operators want to perform local Internet data offloading without changing the existing network, so as to avoid a large amount of data from impacting a core network and meet user requirements, thereby providing a concept of local access function.
The introduction of Home base stations (HNBs, Home nodebs) expands the application range of local access. The femtocell is used as a dedicated resource of some users, is deployed in private places such as homes, groups, companies or schools and the like, and is mainly used for providing higher service rate for the users, reducing the cost required by using high-rate services and making up for the defects of coverage of the existing distributed cellular wireless communication system. The user can access other Internet Protocol (IP) devices of the home network, IP devices in the enterprise network through the home base station, and this application is also called local access because the data stream is not transmitted through the core network.
In summary, the local access functions defined by the 3GPP standards organization include: two of Selected IP transport Offload (SIPTO), and Local IP Access (LIPA). Wherein, SIPTO is applied to the access of Internet network; LIPA applies to access of local network IP devices.
In order to implement the local access function, a gateway for performing a data offloading function is added in the network, as shown in fig. 1. The data shunt gateway can be combined with the wireless side network element or externally arranged near the wireless side network element; the data shunt gateway can also be combined with the home base station gateway or externally arranged near the home base station gateway. For a user supporting local access, a traditional core network access data path and a local access data path can be established at the same time. As shown in fig. 1, for the connection of local access, the local access data path is from the terminal to the wireless side network element to the data distribution gateway, and data transmission does not pass through the core network. In order to realize local access of the terminal to other IP devices of the home network or to the internet, two local access connections may be established. Wherein, the first local access data path directly accesses the internet, i.e. internet IP connection, which may also be called SIPTO connection; the second local access data path directly accesses other IP devices of the home network, i.e. the home network IP connection, which may also be referred to as LIPA connection.
Fig. 2 is a diagram showing a system architecture for performing local access. When a user requests the establishment of a Packet Data Network (PDN) connection, an Access Point Name (APN) or a request indication of a Network to be accessed is brought, and the mobility management unit finds that the user can Access locally according to subscription information, then the mobility management unit selects a core Network gateway and a Data offloading gateway at the same time, and establishes an extension tunnel between the core Network gateway and the Data offloading gateway and a direct tunnel between a wireless side Network element and the Data offloading gateway while establishing the PDN connection of the core Network. And the uplink and downlink data of the core network of the user are sent through a core network tunnel between the wireless side network element and the core network gateway, and the local access uplink and downlink data of the user are sent through a direct tunnel.
When the user enters an idle state, the connection between the user and the wireless side network element is released, the local access downlink data can only be cached in the data distribution gateway, at this time, the local access downlink data needs to be forwarded to the core network gateway through the extension tunnel, the paging of the user is triggered by the core network, and after the air interface connection is established, the direct tunnel can be started to transmit the local access uplink and downlink data. When the user changes from idle to connected state, the extended tunnel is stopped to be used, and the data shunt gateway transfers data by using the direct tunnel.
From the above, it can be seen that: the change of the user state can affect the selection of the data distribution gateway to open the extended tunnel. In a home scenario, the data offloading gateway is usually combined with the wireless base station, so that the air interface connection state can be sensed to determine whether to open the extension tunnel. In deployment scenarios such as enterprises and campuses, data offloading gateways are generally deployed individually, and at present, it is impossible to guarantee that the data offloading gateways can sense the current user state of a user by using the prior art, and even cannot sense the change of the user state from talk, so that the selection of the data offloading gateways for opening an extended tunnel is seriously affected.
Disclosure of Invention
In view of this, the main objective of the present invention is to provide a method and a system for notifying a user state change, which can ensure that a data offloading gateway can timely sense a current user state of a user, so as to facilitate the data offloading gateway to implement selection of opening an extended tunnel.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method of notifying of a user status change, the method comprising:
when the wireless side network element monitors that the user state changes, the wireless side network element notifies the data distribution gateway of the change of the user state; or when the core network element monitors that the user state changes, the core network element notifies the data distribution gateway of the change of the user state.
When the wireless side network element monitors that the user state changes, the method further comprises the following steps:
and the wireless side network element sends a data packet representing the user state change condition to the data distribution gateway through a direct tunnel, and informs the data distribution gateway of the user state change.
The network element of the core network is a mobility management unit; when the mobility management unit monitors that the user state changes, and a direct interface exists between the mobility management unit and the data distribution gateway, the method further comprises the following steps:
the mobile management unit is connected with a control plane between the data distribution gateways, and notifies the data distribution gateways of the change of the user state through a state notification message.
The network element of the core network is a mobility management unit; when the mobility management unit monitors that the user state changes, and no direct interface exists between the mobility management unit and the data distribution gateway, the method further comprises the following steps:
the mobility management unit releases a user plane channel between the wireless side network element and the core network gateway through accessing a bearer release request message; when the core network gateway senses that the current message type is the access bearer release request message, judging that the change of the user state needs to be notified to the data distribution gateway; or,
the mobility management unit directly informs a core network gateway of the need of informing the data distribution gateway of the change of the user state through a message carrying a representation user state change indication.
Wherein, the method also comprises: and the core network gateway informs the data distribution gateway of the change of the user state through a state notification message.
After the data offloading gateway senses the change of the user state, the method further includes: and the data distribution gateway opens an extension tunnel to transmit the user data.
A notification system for a user status change, the system comprising: the notification unit is used for notifying the change of the user state to the data distribution gateway when the wireless side network element monitors the change of the user state; or when the core network element monitors that the user state changes, the core network element notifies the data distribution gateway of the change of the user state.
The notification unit is further configured to, when the wireless side network element monitors that the user state changes, send a data packet representing the user state change situation to the data offloading gateway through the direct tunnel, and notify the data offloading gateway of the user state change.
The notification unit is further configured to, when the mobility management unit monitors that the user state changes, a direct interface exists between the mobility management unit and the data offloading gateway, where the mobility management unit is connected to a control plane of the data offloading gateway, and notifies the data offloading gateway of the change of the user state through a state notification message.
The notification unit is further used for judging that the user state change needs to be notified to the data distribution gateway by the core network gateway by sensing the message type sent by the mobility management unit as an access bearer release request message when the mobility management unit monitors that the user state changes and a direct interface does not exist between the mobility management unit and the data distribution gateway; the core network gateway informs the data distribution gateway of the change of the user state through a state notification message; or,
the notification unit is further configured to, when the mobility management unit monitors that the user state changes, and a direct interface does not exist between the mobility management unit and the data offloading gateway, receive, by the core network gateway, a message that is sent by the mobility management unit and carries an indication indicating that the user state changes, and directly learn that the user state change needs to be notified to the data offloading gateway; and the core network gateway informs the data distribution gateway of the change of the user state through a state notification message.
When the wireless side network element monitors that the user state changes, the wireless side network element notifies the data distribution gateway of the change of the user state; or when the core network element monitors that the user state changes, the core network element notifies the data distribution gateway of the change of the user state.
By adopting the invention, the data distribution gateway is informed of the change of the user state through the wireless side network element or the core network element, so that the data distribution gateway can be ensured to sense the current user state of the user in time, and the data distribution gateway can conveniently realize the selection of opening the extended tunnel.
Drawings
Fig. 1 is a schematic diagram of data flow paths for prior art local access and conventional core network access;
FIG. 2 is a prior art system architecture diagram for performing local access;
FIG. 3 is a schematic flow chart of a first implementation of the method of the present invention;
FIG. 4 is a schematic flow chart of a second implementation of the method of the present invention;
fig. 5 is a schematic flow chart of the third implementation of the method of the present invention.
Detailed Description
The basic idea of the invention is: when the wireless side network element monitors that the user state changes, the wireless side network element notifies the data distribution gateway of the change of the user state; or when the core network element monitors that the user state changes, the core network element notifies the data distribution gateway of the change of the user state.
The following describes the embodiments in further detail with reference to the accompanying drawings.
The notification scheme for the user state change provided by the invention can ensure that the data distribution gateway can timely sense the current user state of the user, so that the data distribution gateway can correctly open the extended tunnel to support the seamless movement of the user and ensure that the user data cannot be lost.
A notification method for user state change mainly comprises the following two aspects:
when the wireless side network element monitors that the user state changes, the wireless side network element notifies the data distribution gateway of the change of the user state.
Here, the wireless side network element monitors the change of the user state, and sends a data packet representing the change of the user state to the data distribution gateway through the direct tunnel so as to inform the change of the user state.
Here, the special packet referred to herein refers to the packet that represents the user status change condition, and the side that receives the special packet knows that the currently received packet is the special packet by parsing the packet header through designing the packet header, for example, adding a private extension field to distinguish from other packets transmitted through the GTP tunnel. And will not be described in detail.
And secondly, when the network element of the core network monitors that the user state changes, the change of the user state is notified to the data distribution gateway.
Here, when the core network element monitors the change of the user state, notifying the data offloading gateway of the change of the user state includes two specific implementations, one is: a direct interface is arranged between the mobility management unit and the data distribution gateway, and the mobility management unit directly informs the data distribution gateway of the change of the user state; II, secondly: there is no direct interface between the mobility management unit and the data distribution gateway, and the mobility management unit cannot directly notify, and needs to indirectly notify by means of the core network gateway, that is, the core network gateway notifies the data distribution gateway of the change of the user state.
The invention is illustrated below.
The first embodiment of the method comprises the following steps: as shown in fig. 3, the flow of the embodiment of the method includes the following steps:
step 301, the mobility management unit sends an air interface connection management message to the wireless side network element.
Here, since the mobility management unit needs to convert the user in the connected state into the idle state in the scenarios of user subscription change, signaling flow end, and the like, it needs to send an air interface connection management message to the wireless side network element to indicate the release of the air interface connection. The air interface connection management message may be S1 or Iu interface release message according to different specific access networks.
Here, the wireless side network element in this document includes, but is not limited to, a macro base station, a home base station, and a home base station gateway, and is not described in detail.
Step 302, monitoring the change of the idle state of the air interface connection, and sending a state notification that the wireless side network element initiates the data distribution gateway when the change occurs.
Here, an air interface connection may also be interrupted due to an abnormality of the wireless side network element, and the user may transition from the connected state to the idle state. The wireless side network element monitors the air interface connection condition, including the scenario described in step 301, and when the user state changes, the wireless side network element may initiate a state notification to the data offloading network element.
Step 303, the wireless side network element sends a special data packet to the data offloading gateway through the existing direct tunnel to notify the user state change.
Here, the subsequent data distribution gateway determines to open the extended tunnel for user data transmission when receiving the special data packet.
It should be noted that the embodiment of the method is only applicable to a case where a direct tunnel user plane exists between the wireless side network element and the data offloading network element. For the case of a user plane without a direct tunnel, the following method embodiment two or method embodiment three may be used.
The second method embodiment: as shown in fig. 4, the flow of the embodiment of the method includes the following steps:
step 401, the mobility management unit sends a session establishment request message to the core network gateway.
Here, when receiving a PDN connection establishment request of a user, the mobility management unit determines whether to start a local access function for the user according to the APN or the request type of the request. And if so, selecting a core network gateway according to the APN, selecting a data distribution gateway according to the current position of the user, and determining to establish a core network PDN connection and an extension tunnel for the user. The mobility management unit sends a Tunnel End IDentifier (TEID) of a control plane of the mobility management unit and a data distribution gateway address selected by the mobility management unit to the core network gateway through the session establishment request message.
Step 402, the core network gateway sends a tunnel establishment request message to the data distribution gateway according to the data distribution gateway address to establish an extended tunnel, wherein the tunnel establishment request message carries a mobility management unit control plane TEID.
Here, the core network gateway may be a unified network element S/P-GW, or a Gateway GPRS Support Node (GGSN); or a separate serving gateway (S-GW) and a packet gateway (P-GW), where in the separate case, the session establishment request message is transmitted between the S-GW and the P-GW network element, and the mobility management unit control plane TEID needs to be carried and transmitted. The S/P-GW referred to herein is a unified network element of the S-GW and the P-GW, and is not described in detail herein.
Step 403, the data offloading gateway allocates a control plane TEID to identify the extension tunnel, and sends the extension tunnel to the core network gateway through a tunnel establishment response message.
Here, the core network gateway may be a unified network element S/P-GW, or GGSN; or may be a separate S-GW and P-GW. Under the condition of distribution, the session establishment response message is transmitted between the S-GW and the P-GW network elements, and the TEID of the control plane of the data distribution gateway needs to be carried and transmitted.
Step 404, the core network gateway replies a session establishment response message, and reports the data distribution network element control plane TEID to the mobility management unit.
Step 405, the mobility management unit finds that the user state changes, and the embodiment of the method is described by taking an example of the user changing from a connected state to an idle state.
Step 406, releasing the air interface connection between the wireless side network element and the mobility management unit.
Step 407, if there is an interface between the mobility management unit and the data offloading network element, the mobility management unit may notify the data offloading gateway of the user state change through the state notification message by using the control plane TEID of the data offloading gateway.
And step 408, the data distribution gateway responds to the state notification response message. The data distribution gateway receiving the user state can determine the opening of the expansion tunnel according to the user state.
Here, when the user changes from the idle state to the connected state, the notification manner in steps 407 and 408 of the embodiment of the method may also be used, and the specific user plane establishment manner does not affect the content of the present invention, and therefore is not described in detail. The implementation premises are the same as the embodiment of the method: when the user starts the local access function, the mobility management unit and the data distribution network element store the control plane TEID of the opposite side for notifying the sending of the message.
The third method embodiment: as shown in fig. 5, the flow of the embodiment of the method includes the following steps:
step 501, the mobility management unit sends a session establishment request message to the core network gateway.
Here, when receiving a PDN connection establishment request of a user, the mobility management unit determines whether to start a local access function for the user according to the APN or the request type of the request. And if so, selecting a core network gateway according to the APN, selecting a data distribution gateway according to the current position of the user, and determining to establish a core network PDN connection and an extension tunnel for the user. And the mobility management unit sends the TEID of the control plane of the mobility management unit and the address of the data distribution gateway selected by the mobility management unit to the core network gateway through the session establishment request message.
Step 502, the core network gateway sends a tunnel establishment request message to the data distribution gateway according to the data distribution gateway address to establish an extended tunnel, wherein the tunnel establishment request message carries a core network gateway control plane TEID.
Here, the core network gateway may be a unified network element S/P-GW, or GGSN; or may be a separate S-GW and P-GW. In the case of the split, the session establishment request message is transmitted between the S-GW and the P-GW, and the TEID of the S-GW control plane needs to be transmitted to the P-GW.
Step 503, the data offloading gateway allocates a control plane TEID to identify the extension tunnel, and sends the extension tunnel to the core network gateway through a tunnel establishment response message.
Here, the core network gateway may be a unified network element S/P-GW, or GGSN; or may be a separate S-GW and P-GW. In the case of the split, the session establishment response message is transmitted between the S-GW and the P-GW, and the TEID of the P-GW control plane needs to be carried and transmitted.
Step 504, the core network gateway replies a session establishment response message, and reports the TEID of the control plane of the core network gateway to the mobility management unit.
Here, the core network gateway control plane TEID may be a control plane TEID of a GGSN or an S-GW or an S/P-GW unification network element.
Step 505, the mobility management unit finds out that the user state changes, and the embodiment of the method is described in the context of the user changing from a connected state to an idle state.
Step 506, the air interface connection between the wireless side network element and the mobility management unit is released.
Step 507, when the air interface connection is released, the mobility management unit releases a user plane channel between the wireless side network element and the core network gateway through the access bearer release request message, the core network gateway senses the message type and judges that a user state notification to the data offloading gateway needs to be initiated, or a special indication is added to the mobility management unit through the message, for example, an information field is added to the message to indicate the user state and inform the core network gateway that the user state needs to be notified to the data offloading gateway. A special indication herein is an indication characterizing a change of state of a user.
Step 508, the core network gateway informs the user status to the data offloading gateway through the status notification message.
Step 509, the data offloading gateway responds to the status notification message.
Step 510, the core network gateway replies to the mobility management unit through the access bearer release response message. The data distribution gateway receiving the user state can determine the opening of the expansion tunnel according to the user state.
Here, when the user changes from the idle state to the connected state, the notification manner in steps 508 and 509 of the embodiment of the method may also be used, and the specific user plane establishment manner does not affect the content of the present invention, and therefore, details are not described here. The implementation premises are the same as the embodiment of the method: when the user starts the local access function, the core network gateway and the data distribution network element store the control plane TEID of the opposite side for informing the sending of the message.
A notification system for a user status change, the system comprising: the notification unit is used for notifying the change of the user state to the data distribution gateway when the wireless side network element monitors the change of the user state; or when the core network element monitors that the user state changes, the core network element notifies the data distribution gateway of the change of the user state.
Here, the notifying unit is further configured to, when the wireless side network element monitors that the user status changes, send a data packet representing a user status change situation to the data offloading gateway through the direct tunnel, and notify the data offloading gateway of the user status change.
Here, the notifying unit is further configured to, when the mobility management unit monitors that the user state changes, and a direct interface exists between the mobility management unit and the data offloading gateway, connect the mobility management unit with a control plane of the data offloading gateway, and notify the data offloading gateway of the change of the user state through a state notification message.
Here, one implementation of the notification unit is: the notification unit is further used for judging that the user state change needs to be notified to the data distribution gateway by the core network gateway sensing the message type sent by the mobility management unit as an access bearer release request message when the mobility management unit monitors that the user state changes and no direct interface exists between the mobility management unit and the data distribution gateway; and the core network gateway informs the data distribution gateway of the change of the user state through a state notification message.
Alternatively, another implementation of the notification unit is: the notification unit is further used for the mobility management unit to monitor that the user state changes, and a direct interface does not exist between the mobility management unit and the data distribution gateway, and the core network gateway receives a message which is sent by the mobility management unit and carries a user state change representation indication, and directly learns the change of the user state of the data distribution gateway which needs to be notified; and the core network gateway informs the data distribution gateway of the change of the user state through a state notification message.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A method for notifying a user of a status change, the method comprising:
when the wireless side network element monitors that the user state changes, the wireless side network element notifies the data distribution gateway of the change of the user state; or when the core network element monitors that the user state changes, the core network element notifies the data distribution gateway of the change of the user state.
2. The method of claim 1, wherein when the wireless-side network element monitors the user status change, the method further comprises:
and the wireless side network element sends a data packet representing the user state change condition to the data distribution gateway through a direct tunnel, and informs the data distribution gateway of the user state change.
3. The method of claim 1, wherein the core network element is a mobility management unit; when the mobility management unit monitors that the user state changes, and a direct interface exists between the mobility management unit and the data distribution gateway, the method further comprises the following steps:
the mobile management unit is connected with a control plane between the data distribution gateways, and notifies the data distribution gateways of the change of the user state through a state notification message.
4. The method of claim 1, wherein the core network element is a mobility management unit; when the mobility management unit monitors that the user state changes, and no direct interface exists between the mobility management unit and the data distribution gateway, the method further comprises the following steps:
the mobility management unit releases a user plane channel between the wireless side network element and the core network gateway through accessing a bearer release request message; when the core network gateway senses that the current message type is the access bearer release request message, judging that the change of the user state needs to be notified to the data distribution gateway; or,
the mobility management unit directly informs a core network gateway of the need of informing the data distribution gateway of the change of the user state through a message carrying a representation user state change indication.
5. The method of claim 4, further comprising: and the core network gateway informs the data distribution gateway of the change of the user state through a state notification message.
6. The method according to claim 2, 3 or 5, wherein after the data offloading gateway senses the change of the user status, the method further comprises: and the data distribution gateway opens an extension tunnel to transmit the user data.
7. A system for notifying a user of a change in status, the system comprising: the notification unit is used for notifying the change of the user state to the data distribution gateway when the wireless side network element monitors the change of the user state; or when the core network element monitors that the user state changes, the core network element notifies the data distribution gateway of the change of the user state.
8. The system according to claim 7, wherein the notifying unit is further configured to, when the wireless-side network element monitors that the user status changes, send a data packet, which represents the user status change, to the data offloading gateway through a direct tunnel, where the data offloading gateway notifies the data offloading gateway of the user status change.
9. The system according to claim 7, wherein the notifying unit is further configured to, when the mobility management unit monitors that the user status changes, and a direct interface exists between the mobility management unit and the data offloading gateway, the mobility management unit is connected to a control plane of the data offloading gateway, and notifies the data offloading gateway of the change of the user status through a status notification message.
10. The system according to claim 7, wherein the notification unit is further configured to, when the mobility management unit monitors that the user state changes, and there is no direct interface between the mobility management unit and the data offloading gateway, the core network gateway determines that the user state change needs to be notified to the data offloading gateway by sensing that a message type sent by the mobility management unit is an access bearer release request message; the core network gateway informs the data distribution gateway of the change of the user state through a state notification message; or,
the notification unit is further configured to, when the mobility management unit monitors that the user state changes, and a direct interface does not exist between the mobility management unit and the data offloading gateway, receive, by the core network gateway, a message that is sent by the mobility management unit and carries an indication indicating that the user state changes, and directly learn that the user state change needs to be notified to the data offloading gateway; and the core network gateway informs the data distribution gateway of the change of the user state through a state notification message.
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| PCT/CN2011/071733 WO2011134323A1 (en) | 2010-04-27 | 2011-03-11 | Method and system for notifying change of user state |
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| CN201010166672.1A CN102238574B (en) | 2010-04-27 | 2010-04-27 | The Notification Method of a kind of User Status change and system |
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| CN105379402A (en) * | 2014-04-21 | 2016-03-02 | 华为技术有限公司 | Bearer control method and system |
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| CN105379402A (en) * | 2014-04-21 | 2016-03-02 | 华为技术有限公司 | Bearer control method and system |
| US10201024B2 (en) | 2014-04-21 | 2019-02-05 | Huawei Technologies Co., Ltd | Bearer control method and system |
| CN105379402B (en) * | 2014-04-21 | 2019-06-11 | 华为技术有限公司 | Bear control method and system |
| US10772136B2 (en) | 2014-04-21 | 2020-09-08 | Huawei Technologies Co., Ltd. | Bearer control method and system |
| US11382146B2 (en) | 2014-04-21 | 2022-07-05 | Huawei Technologies Co., Ltd. | Bearer control method and system |
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| Publication number | Publication date |
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| CN102238574B (en) | 2016-06-15 |
| WO2011134323A1 (en) | 2011-11-03 |
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