CN101640913B - mobility management system and method - Google Patents

Abstract

The present invention discloses a mobility management system, including: a trigger device, which generates a trigger instruction according to the needs of terminal services, and sends a multi-connection management request message when it is determined that the terminal is in a multi-connection state, wherein the multi-connection management request message includes the network connection identification information of the terminal; a multi-connection management device, which is used to receive the multi-connection management request message, obtain the existing connection network information of the terminal currently connected to the network and the terminal service demand information according to the network connection identification information of the terminal, and select a bearer network that meets the needs of the terminal service from the current connected network of the terminal, and return a multi-connection management request response message to the trigger device, wherein the multi-connection management request response message includes the indication information of using the selected bearer network to bear the terminal service. The present invention also discloses a mobility management method, which avoids the occurrence of network switching as much as possible.

Description

Mobility management system and method

technical field

The present invention relates to the technical field of communication networks, in particular to a mobility management system and method.

Background technique

In a heterogeneous network environment, a multi-mode terminal can access different networks through different network interfaces, and communicate with each network. With the development of communication network technology and the needs of users for services, in the future communication network, multi-mode terminals will be able to communicate with multiple networks at the same time, and multiple network connections carry one or more services respectively. The terminal is in multi-connection state.

Existing heterogeneous network mobility management systems and methods are all aimed at the terminal in a single connection scenario. The performance management system only selects a suitable network for the terminal to switch according to the received signal strength (RSS, Received SignalStrength), and then, through the registration and authentication of network access, establishes the connection between the terminal and the selected network, and takes corresponding wireless The seam mechanism guarantees the user's service experience, and finally transfers the terminal service to the new connection. During the network handover process, information negotiation and mutual authentication of network access need to be re-negotiated, which will lead to high overhead and low efficiency of mobility management and a decline in user service experience.

Contents of the invention

The present invention provides a mobility management system, which is used to perform mobility management when a terminal is in a multi-connection state, so as to reduce network overhead, improve network resource utilization efficiency, and improve user service experience.

Correspondingly, the present invention also provides a mobility management method.

A mobility management system, including a trigger device and a multi-connection management device, wherein:

The triggering device is used to generate a trigger instruction according to the requirements of the terminal service, and when it is determined that the terminal is in a multi-connection state, send a multi-connection management request message, and the multi-connection management request message includes the network connection of the terminal identification information;

The multi-connection management device is configured to receive the multi-connection management request message sent by the trigger device, and obtain the terminal's current access to the network according to the network connection identification information of the terminal contained in the multi-connection management request message. According to the obtained existing connection network information and terminal service demand information, select from the currently connected network of the terminal to meet the terminal service requirements and return a multi-connection management request response message to the triggering device, where the multi-connection management request response message includes indication information that the selected bearer network is used to carry the service of the terminal.

A mobility management method comprising:

The trigger device generates a trigger command according to the requirements of the terminal business;

When it is determined that the terminal is in the multi-connection state, sending a multi-connection management request message, the multi-connection management request message includes the network connection identification information of the terminal;

The multi-connection management device receives the multi-connection management request message;

According to the network connection identification information of the terminal, obtain the existing connection network information and terminal service demand information of the terminal currently connected to the network;

Selecting a bearer network that meets the service requirements of the terminal from the currently connected networks of the terminal according to the acquired existing connection network information and terminal service requirement information;

Returning a multi-connection management request response message to the triggering device, where the multi-connection management request response message includes indication information that the selected bearer network is used to bear the service of the terminal.

A mobility management system, including a triggering device, a multi-connection management device and a switching device, wherein:

The triggering device is configured to generate a trigger instruction according to the service requirements of the terminal, and when it is determined that the terminal is in a multi-connection state, send a multi-connection management request message, and the multi-connection management request message includes the network connection identifier of the terminal information; and receiving a multi-connection management request response message returned by the multi-connection management device, and sending a switching trigger instruction according to the multi-connection management request response message;

The multi-connection management device is configured to receive the multi-connection management request message sent by the trigger device, and obtain the terminal's current access to the network according to the network connection identification information of the terminal contained in the multi-connection management request message. According to the obtained existing connection network information and terminal service demand information, it is determined that the terminal's currently connected network does not meet the terminal service demand When the carrier network is used, return a multi-connection management request response message to the triggering device, and the multi-connection management request response message includes indication information that an available network is used to carry the service of the terminal;

The switching device is configured to receive a switching trigger instruction sent by the triggering device, and select a switching network from the available networks of the terminal according to the switching trigger instruction that meets the service requirements of the terminal to carry the terminal business.

A mobility management method comprising:

The trigger device generates a trigger command according to the requirements of the terminal business;

When it is determined that the terminal is in the multi-connection state, sending a multi-connection management request, the multi-connection management request includes the network connection identification information of the terminal;

The multi-connection management device receives the multi-connection management request message;

According to the network connection identification information contained in the multi-connection management request message, obtain the existing connection network information and terminal service demand information that the terminal has currently accessed to the network;

When it is determined according to the existing connection network information and terminal service demand information that there is no bearer network that meets the terminal service requirements in the currently accessed network of the terminal, return a multi-connection management request response message to the a triggering device, wherein the multi-connection management request response message includes indication information that an available network is used to bear the service of the terminal;

The triggering device receives the multi-connection management request response message, and sends a handover trigger instruction according to the indication information that the available network is used to bear the service of the terminal;

The switching device receives the switching trigger instruction;

According to the handover triggering instruction, a handover network that meets the service requirements of the terminal is selected from the available networks of the terminal to carry the service of the terminal.

In the mobility management system and method provided by the embodiments of the present invention, the triggering device generates a triggering instruction according to the service requirements of the terminal, and when it is determined that the terminal is in a multi-connection state, sends a multi-connection management request message to the multi-connection management device, and the multi-connection management device According to the network connection identification information of the terminal contained in the multi-connection management request message, obtain the existing connection network information and terminal service demand information of the terminal currently connected to the network, and select the network connection that meets the requirements from the currently connected network. The bearer network required by the terminal service then returns a multi-connection management request response message including indication information that the bearer network is used to bear the terminal service to the triggering device. Therefore, when performing mobility management, the network that has been accessed is preferred. Since the network that has been accessed has negotiated and mutually authenticated network access information with the terminal, it is no longer necessary to perform registration and authentication for network access. Unnecessary operations are avoided, network overhead is reduced, network resource utilization efficiency is improved, and user service experience is improved at the same time.

Description of drawings

FIG. 1 is a structural diagram of a mobility management system provided in an embodiment of the present invention;

Fig. 2 is a structural diagram of a trigger device in an embodiment of the present invention;

FIG. 3 is a structural diagram of a multi-connection management device in an embodiment of the present invention;

FIG. 4 is a flowchart of a mobility management method provided in an embodiment of the present invention;

FIG. 5 is a structural diagram of another mobility management system provided in an embodiment of the present invention;

Fig. 6 is a structural diagram of another trigger device in the embodiment of the present invention;

FIG. 7 is a structural diagram of another multi-connection management device in an embodiment of the present invention;

FIG. 8 is a structural diagram of a switching device in an embodiment of the present invention;

FIG. 9 is a flowchart of another mobility management method provided in an embodiment of the present invention;

Fig. 10 is an example flowchart of a mobility management method according to an embodiment of the present invention.

Detailed ways

Aiming at the problems existing in the prior art, the embodiments of the present invention provide a mobility management system and method, which can avoid or delay the occurrence of some network handovers and realize efficient utilization of network resources under the premise of ensuring user experience.

The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

FIG. 1 shows a structural diagram of a mobility management system provided by an embodiment of the present invention. It can be seen from FIG. 1 that the mobility management system includes a trigger device 110 and a multi-connection management device 120, wherein:

The triggering device 110 is configured to generate a trigger instruction according to the service requirements of the terminal, and when it is determined that the terminal is in a multi-connection state, send a multi-connection management request message, and the multi-connection management request message includes the network connection identification information of the terminal;

Wherein, the network connection identification information of the terminal may include the identification of the terminal and the identification of the terminal currently connected to the network.

The multi-connection management device 120 is configured to receive the multi-connection management request message sent by the trigger device 110, obtain the existing connection network information and terminal service demand information of the terminal currently connected to the network according to the network connection identification information of the terminal, and obtain the terminal service demand information according to the The acquired existing connection network information and terminal service requirement information select a bearer network that meets the terminal service requirements from the currently connected networks of the terminal, and return a multi-connection management request response message to the triggering device 110. The multi-connection management request response message includes indication information that the selected bearer network is used to bear terminal services.

FIG. 2 shows a structural diagram of the triggering device 110 in the above-mentioned mobility management system, including:

a trigger instruction generation unit 111, configured to generate a trigger instruction according to the requirements of terminal services;

Among them, the requirements of the terminal service include the requirements of the terminal service on the terminal side and the network side, and the trigger command generation unit 111 is responsible for collecting relevant information on the network side and the terminal side in the network that the terminal has currently connected to, and performing analysis and processing. Trigger instructions are generated when the trigger conditions specified by the business requirements are met. The information to be collected may include: underlying information (link quality, bit error rate, signal-to-interference ratio, etc.), network event information (load balancing, resource negotiation information (especially when there are a large number of multi-connected terminals in the network)), service Attribute requirements (sensitivity to QoS such as bandwidth and delay), changes in user wishes (user requirements for billing standards, requirements for access network security (changes with service changes), etc.), terminal status information (Mainly related to energy saving). Trigger conditions can include threshold method, etc., that is, when one or several parameters exceed the threshold value, that is, when the currently connected network cannot meet the needs of terminal services, a trigger instruction is generated according to the needs of the terminal service. It may include network connection identification information of the terminal, etc., and the network connection identification information may be used to determine whether the terminal is in a multi-connection state.

The request message sending unit 112 is configured to send a multi-connection management request message when it is determined that the terminal is in the multi-connection state after the trigger instruction generating unit 111 generates the trigger instruction, and the multi-connection management request message includes the terminal's network connection identification information;

The request message sending unit 112 can obtain the collected relevant network-side and terminal-side information from the trigger command generating unit 111, such as terminal network connection identification information, terminal status information, network event information, etc., and then generate a multi-connection management request message, and send it to the multi-connection management device 120;

When the request message sending unit 112 determines that the terminal is in the single connection state, the subsequent processing is the same as that of the prior art, and will not be repeated here.

The above-mentioned triggering device 110 may also include:

The judging unit 113 is configured to judge whether the terminal is in the multi-connection state after the triggering instruction generating unit 111 generates the triggering instruction, and when it is judged that the terminal is in the multi-connection state, instruct the request message sending unit 112 to send the multi-connection management request message;

Here, the judgment unit 113 can judge whether the terminal is in a multi-connection state according to the network connection identification information of the terminal contained in the trigger instruction; of course, the judgment unit 113 can also obtain the network connection identification information of the terminal in other ways, such as from The trigger instruction generation unit 111 obtains the relevant information collected, so as to determine whether the terminal is in the multi-connection state according to the obtained network connection identification information of the terminal.

The receiving unit 114 is configured to receive the multi-connection management request response message returned by the multi-connection management device 120;

The instructing unit 115 is configured to instruct the bearer network to bear the terminal service according to the indication information contained in the multi-connection management request response message received by the receiving unit 114 to adopt the selected bearer network to bear the terminal service.

FIG. 3 shows a structural diagram of the multi-connection management device 120 in the above-mentioned mobility management system, including:

A request message receiving unit 121, configured to receive the multi-connection management request message sent by the triggering device 110;

The request message receiving unit 121 may receive a multi-connection management request (Multi-connection Management Request) message from the triggering device 110 through a specific interface between the triggering device 110 and the multi-connection management device 120 .

The obtaining unit 122 is configured to obtain, according to the network connection identification information of the terminal contained in the multi-connection management request message received by the request message receiving unit 121, the existing connection network information and terminal service demand information of the terminal currently connected to the network ;

According to the network connection identification information of the terminal contained in the multi-connection management request message, the obtaining unit 122 queries the information servers (user information server and service information server) in the network for related service information, user information, priority information and network information. topology information, etc. The multi-connection management request message may also include energy demand query and status information of the terminal or network. At this time, the acquisition unit 122 also needs to acquire energy decision information, which may be provided by the energy decision unit. The energy decision unit may According to the network connection identification information of the terminal contained in the multi-connection management request message, energy decision information is provided. The energy decision information may include information such as the energy consumption demand of the network for the terminal and the current energy consumption level of the terminal. The energy consumption level of the terminal can be dynamically obtained by the energy decision-making unit, or can be sent by the terminal to the trigger device 110, and then the current energy consumption level information of the terminal is carried in the multi-connection management request message, and provided to the energy decision-making unit.

The selection unit 123 is configured to select a bearer network that meets the service requirements of the terminal from the networks currently accessed by the terminal according to the existing connection network information and terminal service demand information obtained by the obtaining unit 122;

The selection unit 123 selects from the currently connected networks of the terminal that meet the service requirements of the terminal according to the above-mentioned existing connection network information and terminal service demand information acquired by the acquisition unit 122, and uses preset relevant strategies and algorithms. bearer network.

The response message returning unit 124 is configured to return a multi-connection management request response message to the triggering device 110 , the multi-connection management request response message includes indication information for carrying the terminal service on the bearer network selected by the selection unit 123 .

The multi-connection management request response (Multi-connection Management Response) message returned by the response message returning unit 124 to the triggering device 110 may also include relevant strategies and algorithms used by the selection unit 123, and energy decision information provided by the energy decision unit.

Correspondingly, the embodiment of the present invention also provides a mobility management method, the process of which is shown in Figure 4, and the specific steps are as follows:

Step 410, the triggering device generates a trigger command according to the requirements of the terminal service;

In this step, the trigger instruction may include the network connection identification information of the terminal. The following factors may cause the trigger device to generate a trigger command:

First, the quality of the access network is degraded or the QoS requirements of the terminal service are changed, so that the original access network cannot meet the requirements of the terminal service, and the access network needs to be changed to carry the terminal service;

Second, when a terminal initiates a new service, a network connection needs to be established to carry the new terminal service;

Third, the terminal detects a better connected network, actively requests to change the network connection, and transfers terminal services to other connected networks.

Step 420, when the triggering device determines that the terminal is in the multi-connection state according to the trigger instruction, it sends a multi-connection management request message, and the multi-connection management request message includes the network connection identification information of the terminal;

In this step, the triggering device judges whether the terminal is in a multi-connection state according to the network connection identification information of the terminal contained in the trigger instruction.

Step 430, the multi-connection management device receives the multi-connection management request message;

Step 440: The multi-connection management device obtains the existing network connection information and terminal service demand information of the terminal currently connected to the network according to the network connection identification information of the terminal;

In this step, the existing connection network information that needs to be obtained may include:

Current network quality information, such as received signal strength, signal-to-noise ratio, etc.;

Network current load information, such as channel occupancy, etc.;

Current network resource information, such as available bandwidth, resource reservation, etc.

The terminal business demand information that needs to be obtained may include:

Business attribute requirements: sensitivity to QoS such as bandwidth and delay;

Changes in user wishes: user requirements for billing standards, security requirements for access networks (changes with service changes), etc.;

Terminal status information: mainly related to energy saving.

Step 450: The multi-connection management device selects a bearer network that meets the service requirements of the terminal from the currently connected networks of the terminal according to the acquired existing connection network information and terminal service requirement information;

In this step, the multi-connection management device may first select a set of candidate networks that meet the service requirements of the terminal from the currently connected networks of the terminal according to the acquired existing connection network information and terminal service demand information. The current network quality information and current network load information in the connected network information can be used to determine whether the currently connected network can allow terminal service access, and the current network resource information and terminal service demand information can be used to further determine whether the currently connected network Meet the needs of the terminal business. Then, the multi-connection management device selects a suitable bearer network from the set of candidate networks according to preset related policies and algorithms.

When applying the above preset related strategies and algorithms, the following information needs to be considered: network-side information and terminal-side information, where network-side information includes parameters such as bandwidth, rate, delay, cost, power consumption, and security; Side information includes parameters such as user level, user preference, service type, and service requirements. Algorithms can use a variety of algorithms based on policies, cost functions, fuzzy logic, and multiple attributes.

In addition, when a trigger instruction is generated because the terminal detects a better network already connected, the trade-off between performance improvement and cost should be considered when selecting the bearer network, and corresponding judgment criteria should be set (for example, setting the performance improvement gate Limits) to determine whether to perform transfers to the access network, for example:

Evaluate the degree to which the desired access network improves terminal service performance compared to the original access network;

Evaluate the network overhead caused by access network transfer and the potential impact on terminal services;

Determine whether to transfer terminal services to a better access network according to the set judgment criteria.

Step 460, the multi-connection management device returns a multi-connection management request response message to the trigger device, and the multi-connection management request response message includes indication information for using the selected bearer network to carry the terminal service;

Step 470, the triggering device receives the multi-connection management request response message;

Step 480: The triggering device instructs the bearer network to bear the terminal service according to the indication information contained in the multi-connection management request response message that the selected bearer network is used to bear the terminal service.

In this step, since the selected bearer network is currently connected to the network by the terminal, it may be performing other communication services with the terminal. To share the bearer network resources, it is necessary to allocate network resources reasonably to meet the needs of multiple services at the same time. When allocating network resources, the following factors need to be considered:

System performance on the network side: throughput, spectrum utilization, etc.;

Terminal-side service experience: user priority, user fairness, service QoS requirements, etc.

FIG. 5 shows a structural diagram of another mobility management system provided by an embodiment of the present invention. It can be seen from FIG. 5 that the mobility management system includes a triggering device 510, a multi-connection management device 520, and a switching device 530. in:

The triggering device 510 is configured to generate a trigger instruction according to the service requirements of the terminal, and when it is determined that the terminal is in a multi-connection state, send a multi-connection management request message, and the multi-connection management request message includes the network connection identification information of the terminal; and receiving the multi-connection management request response message returned by the multi-connection management device 520, and sending a switching trigger instruction according to the multi-connection management request response message;

The multi-connection management device 520 is configured to receive the multi-connection management request message sent by the trigger device 510, obtain the existing network connection information and terminal service demand information of the terminal currently connected to the network according to the network connection identification information of the terminal, and then According to the obtained existing connection network information and terminal service demand information, when it is determined that there is no bearer network that meets the terminal service requirements in the currently accessed network of the terminal, return a multi-connection management request response message to the triggering device 510 , the multi-connection management request response message includes indication information that an available network is used to bear the service of the terminal;

Here, the available network of the terminal refers to other overlay networks existing at the communication location of the terminal that the terminal does not access.

The switching means 530 is configured to receive the switching trigger instruction sent by the triggering means 510, and according to the switching triggering instruction, select a switching network that meets the service requirements of the terminal from the available networks of the terminal to carry the service of the terminal.

FIG. 6 shows a structural diagram of the triggering device 510 in the above-mentioned mobility management system, including:

a trigger instruction generation unit 511, configured to generate a trigger instruction according to the requirements of terminal services;

Among them, the requirements of the terminal service include the requirements of the terminal service on the terminal side and the network side, and the trigger command generation unit 511 is responsible for collecting relevant information on the network side and the terminal side in the network that the terminal has currently connected to, and performing analysis and processing. Trigger instructions are generated when the trigger conditions specified by the business requirements are met. The information to be collected may include: underlying information (link quality, bit error rate, signal-to-interference ratio, etc.), network event information (load balancing, resource negotiation information (especially when there are a large number of multi-connected terminals in the network)), service Attribute requirements (sensitivity to QoS such as bandwidth and delay), changes in user wishes (user requirements for billing standards, requirements for access network security (changes with service changes), etc.), terminal status information (Mainly related to energy saving). Trigger conditions can include threshold method, etc., that is, when one or several parameters exceed the threshold value, that is, when the currently connected network cannot meet the needs of terminal services, a trigger instruction is generated according to the needs of the terminal service. It may include network connection identification information of the terminal, and the network connection identification information may be used to determine whether the terminal is in a multi-connection state.

The request message sending unit 512 is configured to send a multi-connection management request message when it is determined that the terminal is in the multi-connection state after the trigger instruction generating unit 511 generates the trigger instruction, and the multi-connection management request message includes the terminal's Network connection identification information;

The request message sending unit 512 can obtain the collected relevant network-side and terminal-side information from the trigger command generating unit 511, such as the terminal's network connection identification information, terminal status information, network time information, etc., and then generate a multi-connection management request message, and send it to the multi-connection management device 520;

When the request message sending unit 512 determines that the terminal is in the single connection state, the subsequent processing is the same as that of the prior art, and will not be repeated here.

The receiving unit 513 is configured to receive the multi-connection management request response message returned by the multi-connection management device 520;

The handover trigger instruction sending unit 514 is configured to send a handover trigger instruction according to the multiple connection management request response message received by the receiving unit 513 .

The handover trigger instruction may include parameter information collected by the trigger instruction generation unit 511 and information carried in the multi-connection management request response message returned by the multi-connection management device 520 .

The above-mentioned triggering device 510 may also include:

The judging unit 515 is configured to judge whether the terminal is in a multi-connection state after the trigger command generation unit 511 generates the trigger command, and when it is judged that the terminal is in a multi-connection state, instruct the request message sending unit 512 to send a multi-connection management request message.

Here, the judging unit 515 can judge whether the terminal is in the multi-connection state according to the network connection identification information of the terminal contained in the trigger instruction, or judge whether the terminal is in the multi-connection state according to the network connection identification information of the terminal obtained in other ways. Multiple connection status.

FIG. 7 shows a structural diagram of a multi-connection management device 520 in the above-mentioned mobility management system, including:

A request message receiving unit 521, configured to receive the multi-connection management request message sent by the triggering device 510;

The request message receiving unit 521 may receive a multi-connection management request (Multi-connection Management Request) message from the triggering device 510 through a specific interface between the triggering device 510 and the multi-connection management device 520 .

The obtaining unit 522 is configured to obtain, according to the network connection identification information of the terminal contained in the multi-connection management request message received by the request message receiving unit 521, the existing connection network information and terminal service demand information of the terminal currently connected to the network ;

The acquisition unit 522 acquires the existing connection network information and terminal service demand information of the terminal currently connected to the network, which is the same as the acquisition unit 122 acquisition process in the foregoing embodiments, and will not be repeated here.

The response message returning unit 523 is configured to determine, according to the existing connection network information and terminal service requirement information obtained by the obtaining unit 522, that there is no bearer network that meets the service requirements of the terminal in the currently accessed network of the terminal , returning a multi-connection management request response message to the triggering device 510, where the multi-connection management request response message includes indication information that an available network is used to bear the service of the terminal.

The multi-connection management request response message returned by the response message returning unit 523 to the triggering device 510 may also include the energy decision information provided by the energy decision unit.

The above multi-connection management device 520 may also include:

The determining unit 524 is configured to determine whether there is a bearer network that meets the terminal service requirements in the currently accessed network of the terminal according to the existing connection network information and terminal service demand information obtained by the obtaining unit 522;

When the determination result is negative, instruct the response message returning unit 523 to return a multi-connection management request response message to the triggering device 510 .

FIG. 8 shows a structural diagram of a switching device 530 in the above-mentioned mobility management system, including:

A switch trigger instruction receiving unit 531, configured to receive a switch trigger instruction sent by the trigger device 510;

The switch trigger instruction receiving unit 531 may receive the switch trigger instruction through a specific interface between the trigger device 510 and the switch device 530 .

The selection unit 532 is configured to, according to the handover trigger instruction received by the handover trigger instruction receiving unit 531, select a handover network that meets the service requirements of the terminal from the available networks of the terminal to carry the service of the terminal.

Wherein the selection unit 532 includes:

The acquiring subunit 5321 is configured to acquire the network information of the available network of the terminal and the service requirement information of the terminal according to the handover trigger instruction;

The terminal's available network information and terminal service requirement information obtained by the obtaining subunit 5321 include: obtaining partial parameter information from the trigger device 510, obtaining terminal status information from the terminal, and obtaining network information from the network information server and user information server on the network side and user information, network topology information, etc., and classify and process the obtained information according to corresponding policies, determine useful and available network information, and then send it to the selection subunit 5322.

The selection subunit 5322 is configured to select, according to the network information of the available networks and terminal service requirement information acquired by the acquisition subunit 5321, a switching network that meets the requirements of the terminal service to carry the terminal service.

The selection subunit 5322 uses the corresponding handover decision algorithm according to the available network information and terminal service requirement information provided by the acquisition subunit 5321 to select a handover network that meets the terminal service requirements to carry the terminal service.

Correspondingly, the embodiment of the present invention provides another mobility management method, the flow of which is shown in FIG. 9 , and the specific steps are as follows:

Step 910, the triggering device generates a trigger command according to the requirements of the terminal service;

This step is the same as the processing method of step 410 in the foregoing embodiment, and will not be repeated here.

Step 920, when the triggering device determines that the terminal is in the multi-connection state according to the trigger instruction, send a multi-connection management request, and the multi-connection management request includes the network connection identification information of the terminal;

In this step, the triggering device judges whether the terminal is in a multi-connection state according to the network connection identification information of the terminal contained in the trigger instruction.

Step 930, the multi-connection management device receives the multi-connection management request message;

Step 940: The multi-connection management device obtains the existing connection network information and terminal service demand information of the terminal currently connected to the network according to the network connection identification information contained in the multi-connection management request message;

In this step, the existing connection network information that needs to be obtained may include:

Current network quality information, such as received signal strength, signal-to-noise ratio, etc.;

Network current load information, such as channel occupancy, etc.;

Current network resource information, such as available bandwidth, resource reservation, etc.

The terminal business demand information that needs to be obtained may include:

Business attribute requirements: sensitivity to QoS such as bandwidth and delay;

Changes in user wishes: user requirements for billing standards, security requirements for access networks (changes with service changes), etc.;

Terminal status information: mainly related to energy saving.

Step 950: The multi-connection management device returns a multi-connection management request response when it determines that there is no bearer network that meets the service requirements of the terminal in the currently connected network of the terminal according to the existing connection network information and the terminal service demand information Sending a message to the triggering device, the multi-connection management request response message includes the information that the available network is used to bear the service of the terminal;

In this step, the process of judging whether there is a bearer network that meets the service requirements of the terminal in the network currently accessed by the terminal is as follows: the multi-connection management device can firstly use the current network quality information and the current network quality information in the existing connection network information. The load information judges whether the currently connected network can allow terminal service access, and then further judges whether the currently connected network meets the terminal service requirements according to the current network resource information and terminal service demand information.

Step 960: The triggering device receives the multi-connection management request response message, and sends a handover trigger instruction according to the information that the service of the terminal is carried by the available network;

Step 970, the switching device receives the switching trigger instruction;

In step 980, the switching device selects a switching network that satisfies the service requirements of the terminal from the available networks of the terminal to carry the service of the terminal according to the switching trigger instruction.

In this step, the switching device obtains the network information of the available network of the terminal and the service requirement information of the terminal according to the switching trigger instruction; then, according to the obtained network information of the available network and the service requirement information of the terminal, select a The switching network required by the service to carry the terminal service. Its specific implementation process is the same as that of the prior art, and will not be repeated here.

The following is an example to illustrate the specific implementation of the above two mobility management methods. As shown in Figure 10, it is assumed that the current terminal service 1 is carried by UTRAN (connected to network 1), and terminal service 2 is carried by WLAN network (connected to network 2). Bearer, the specific steps are as follows:

Step 1001, the trigger device detects various aspects of information (including underlying information, network event information, changes in user wishes, etc.), and finds that the service experience of the user's connected network 1 has declined, and it is necessary to improve the user's service experience through mobility management , so a trigger instruction is generated;

Step 1002, the triggering device determines that the terminal is in a multi-connection state according to the terminal network connection identification information in the triggering instruction, and then sends a multi-connection management request message to the multi-connection management device;

Step 1003, the multi-connection management device receives the multi-connection management request message;

Step 1004, the multi-connection management device obtains the existing connection network information of the terminal currently connected to the network (connected to network 2), and the QoS requirement information of the terminal service 1, energy decision information on the access network side, etc. through the network information server .

Step 1005, the multi-connection management device judges whether the connected network 2 satisfies the requirements of the terminal service 1 according to the acquired existing connected network information (network information of the connected network 2) and terminal service demand information. When the incoming network 2 meets the requirements of the terminal service 1, select the accessed network 2 as the bearer network, and then proceed to step 1006; when the accessed network 2 does not meet the requirements of the terminal service 1, proceed to step 1009;

Step 1006, the multi-connection management device returns a multi-connection management request response message to the trigger device, the multi-connection management request response message includes the selected bearer network, that is, the access network 2 to carry the terminal service 1;

Step 1007, the triggering device receives the multi-connection management request response message;

Step 1008, the triggering device instructs the accessed network 2 to carry the terminal service 1 according to the information contained in the multi-connection management request response message that the selected accessed network 2 is used to carry the terminal service 1;

Step 1009, the multi-connection management device returns a multi-connection management request response message to the trigger device, and the multi-connection management request response message includes indication information for using an available network to carry the terminal service;

Step 1010, the triggering device receives the multi-connection management request response message, and sends a handover triggering instruction according to the information that the service of the terminal is carried by the available network;

Step 1011, the switching device receives the switching trigger instruction;

Step 1012, the switching device selects a switching network that meets the service requirements of the terminal from the available networks of the terminal according to the switching trigger instruction to carry the service of the terminal.

In the mobility management system and method provided by the above-mentioned embodiments of the present invention, when the terminal is in the multi-connection state, the multi-connection management device first determines the current Whether there is a bearer network that meets the service requirements of the terminal in the accessed network, when the judgment result is yes, select the bearer network in the currently accessed network to carry the service of the terminal; otherwise, instruct the trigger device and the switching device to perform traditional network switching processing. Therefore, by adopting the mobility management system and method provided by the embodiments of the present invention, the occurrence of network switching can be avoided or delayed as much as possible, thereby reducing network overhead, improving utilization efficiency of network resources, and improving user service experience.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (23)

1. A mobility management system, characterized in that it includes a trigger device and a multi-connection management device, wherein: The triggering device is configured to generate a trigger instruction according to the service requirements of the terminal, and when it is determined that the terminal is in a multi-connection state, send a multi-connection management request message, and the multi-connection management request message includes the network connection identifier of the terminal information; The multi-connection management device is configured to receive the multi-connection management request message sent by the trigger device, and obtain the terminal's current access to the network according to the network connection identification information of the terminal contained in the multi-connection management request message. According to the obtained existing connection network information and terminal service demand information, from the currently connected network of the terminal, select the network that meets the terminal service demand The bearer network, and return a multi-connection management request response message to the triggering device, where the multi-connection management request response message includes indication information that the selected bearer network is used to bear the service of the terminal. 2. The system according to claim 1, wherein the triggering means comprises: a trigger instruction generation unit, configured to generate a trigger instruction according to the requirements of terminal services; The first request message sending unit is configured to send a multi-connection management request message when it is determined that the terminal is in a multi-connection state after the trigger instruction generating unit generates the trigger instruction, and the multi-connection management request message includes the terminal's information. Network connection identification information. 3. The system according to claim 1, wherein the triggering device comprises a trigger instruction generating unit, a judging unit and a second request message sending unit, wherein: The trigger instruction generation unit is configured to generate a trigger instruction according to the requirements of terminal services; The judging unit is configured to judge whether the terminal is in the multi-connection state after the trigger instruction generation unit generates the trigger command, and instruct the second request message sending unit to send the multi-connection state when it is judged that the terminal is in the multi-connection state. management request message; The second request message sending unit is configured to send a multi-connection management request message according to the instruction of the judging unit, and the multi-connection management request message includes the network connection identification information of the terminal. the 4. The system according to claim 2 or 3, wherein the trigger command generated by the trigger command generation unit includes the network connection identification information of the terminal, and according to the network connection identification information of the terminal contained in the trigger command, Identification information to determine whether the terminal is in a multi-connection state. 5. The system according to claim 2 or 3, wherein the triggering device further comprises: a receiving unit, configured to receive a multi-connection management request response message returned by the multi-connection management device; An instructing unit, configured to instruct the bearer network to bear the terminal service according to the indication information of using the selected bearer network to bear the terminal service contained in the multiple connection management request response message received by the receiving unit. 6. The system according to claim 1, wherein the multi-connection management device comprises: a request message receiving unit, configured to receive the multi-connection management request message sent by the trigger device; The acquiring unit is configured to acquire the existing connection network information and terminal service demand information of the terminal currently connected to the network according to the network connection identification information of the terminal contained in the multi-connection management request message received by the request message receiving unit ; A selection unit, configured to select a bearer network that satisfies the service requirements of the terminal from the networks currently accessed by the terminal according to the existing connection network information and terminal service requirement information obtained by the obtaining unit; A response message returning unit, configured to return a multi-connection management request response message to the triggering device, where the multi-connection management request response message includes instruction information for using the bearer network selected by the selection unit to carry the terminal service. 7. The system according to claim 1, wherein the multi-connection management device is further configured to, according to the acquired existing connection network information and terminal service requirement information, determine the currently connected When there is no bearer network that satisfies the service requirements of the terminal in the inbound network, return a multi-connection management request response message to the triggering device, where the multi-connection management request response message includes an indication that an available network is used to bear the service of the terminal information; The triggering device is further configured to receive the multiple connection management request response message, and send a switching trigger instruction according to the multiple connection management request response message. 8. The system according to claim 7, further comprising a switching device, configured to receive a switching trigger instruction sent by the triggering device, and select a network from available networks of the terminal according to the switching trigger instruction A handover network meeting the requirements of the terminal service bears the terminal service. 9. A mobility management method, comprising: The trigger device generates a trigger command according to the requirements of the terminal business; When it is determined that the terminal is in the multi-connection state, sending a multi-connection management request message, the multi-connection management request message includes the network connection identification information of the terminal; The multi-connection management device receives the multi-connection management request message; According to the network connection identification information of the terminal, obtain the existing connection network information and terminal service demand information of the terminal currently connected to the network; Selecting a bearer network that meets the service requirements of the terminal from the currently connected networks of the terminal according to the acquired existing connection network information and terminal service requirement information; Returning a multi-connection management request response message to the triggering device, where the multi-connection management request response message includes indication information that the selected bearer network is used to bear the service of the terminal. 10. The method according to claim 9, wherein the trigger instruction includes network connection identification information of the terminal, and the triggering device judges whether the terminal is in a multi-connection state according to the network connection identification information. 11. The method according to claim 9, wherein after the multi-connection management device returns the multi-connection management request response message, further comprising: The triggering means receives the multiple connection management request response message; and Instructing the bearer network to bear the terminal service according to the indication information of using the selected bearer network to bear the terminal service contained in the received multi-connection management request response message. 12. The method according to claim 9, wherein the multi-connection management device determines that there is no satisfying network in the currently connected network of the terminal according to the acquired existing connection network information and terminal service demand information. When the carrier network required by the terminal service is used, return a multi-connection management request response message to the trigger device, and the multi-connection management request response message includes indication information for using an available network to carry the terminal service; The triggering device sends a handover trigger instruction according to the indication information that the available network is used to carry the terminal service; the switching device receives the switching trigger instruction; and According to the handover triggering instruction, a handover network that meets the service requirements of the terminal is selected from the available networks of the terminal to carry the service of the terminal. 13. A mobility management system, characterized in that it comprises a triggering device, a multi-connection management device and a switching device, wherein: The triggering device is configured to generate a trigger instruction according to the service requirements of the terminal, and when it is determined that the terminal is in a multi-connection state, send a multi-connection management request message, and the multi-connection management request message includes the network connection identifier of the terminal information; and receiving a multi-connection management request response message returned by the multi-connection management device, and sending a switching trigger instruction according to the multi-connection management request response message; The multi-connection management device is configured to receive the multi-connection management request message sent by the trigger device, and obtain the terminal's current access to the network according to the network connection identification information of the terminal contained in the multi-connection management request message. According to the obtained existing connection network information and terminal service demand information, it is determined that the terminal's currently connected network does not meet the terminal service demand When the carrier network is used, return a multi-connection management request response message to the triggering device, and the multi-connection management request response message includes indication information that an available network is used to carry the service of the terminal; The switching device is configured to receive a switching trigger instruction sent by the triggering device, and select a switching network from the available networks of the terminal according to the switching trigger instruction that meets the service requirements of the terminal to carry the terminal business. 14. The system of claim 13, wherein the triggering means comprises: A trigger instruction generation unit is used to generate a trigger instruction according to the requirements of the terminal business; The first request message sending unit is configured to send a multi-connection management request message when it is determined that the terminal is in a multi-connection state after the trigger instruction generation unit generates the trigger instruction, and the multi-connection management request message includes the terminal's information. Network connection identification information; a receiving unit, configured to receive a multi-connection management request response message returned by the multi-connection management device; A handover trigger instruction sending unit, configured to send a handover trigger instruction according to the multiple connection management request response message received by the receiving unit. 15. The system according to claim 13, wherein the triggering device comprises a trigger instruction generating unit, a judging unit, a second request message sending unit, a receiving unit, and a switching trigger instruction sending unit, wherein: The trigger instruction generation unit is configured to generate a trigger instruction according to the requirements of terminal services; The judging unit is configured to judge whether the terminal is in the multi-connection state after the trigger instruction generation unit generates the trigger instruction, and instruct the second request message sending unit to send a multi-connection state when it is judged that the terminal is in the multi-connection state. connection management request message; The second request message sending unit is configured to send a multi-connection management request message according to the instruction of the judging unit, and the multi-connection management request message includes the network connection identification information of the terminal; The receiving unit is configured to receive a multi-connection management request response message returned by the multi-connection management device; The switching trigger instruction sending unit is configured to send a switching trigger instruction according to the multiple connection management request response message received by the receiving unit. 16. The system according to claim 14 or 15, wherein the trigger instruction generated by the trigger instruction generation unit includes the network connection identification information of the terminal, and according to the network connection identification information of the terminal included in the trigger instruction Identification information to determine whether the terminal is in a multi-connection state. 17. The system according to claim 13, wherein the multi-connection management device comprises: a request message receiving unit, configured to receive the multi-connection management request message sent by the trigger device; The obtaining unit is configured to obtain, according to the network connection identification information of the terminal contained in the multi-connection management request message received by the request message receiving unit, obtain the existing connection network information and terminal service demand information of the terminal currently connected to the network ; The first response message returning unit is configured to determine, according to the existing connected network information and terminal service demand information acquired by the acquisition unit, that there is no network that meets the service requirements of the terminal in the currently accessed network of the terminal When the network is carried, a multi-connection management request response message is returned to the triggering device, and the multi-connection management request response message includes indication information that an available network is used to carry the service of the terminal. 18. The system according to claim 13, wherein the multi-connection management device comprises a request message receiving unit, an obtaining unit, a determining unit, and a second response message returning unit, wherein: The request message receiving unit is configured to receive the multi-connection management request message sent by the trigger device; The obtaining unit is configured to obtain, according to the network connection identification information of the terminal contained in the multi-connection management request message received by the request message receiving unit, the existing connection network information and terminal service information of the terminal currently connected to the network demand information; The determining unit is configured to determine, according to the existing connection network information and terminal service requirement information obtained by the obtaining unit, whether there is a bearer network that meets the service requirements of the terminal in the currently accessed network of the terminal; When the determination result is no, instruct the second response message returning unit to return a multi-connection management request response message to the triggering device; The second response message returning unit is configured to return a multi-connection management request response message to the triggering device according to the instruction of the determining unit, and the multi-connection management request response message includes using an available network to carry the terminal service instructions for the . 19. The system of claim 13, wherein the switching means comprises: A switch trigger instruction receiving unit, configured to receive a switch trigger instruction sent by the trigger device; The selection unit is configured to, according to the handover trigger instruction received by the handover trigger instruction receiving unit, select a handover network that meets the service requirements of the terminal from the available networks of the terminal to carry the service of the terminal. the 20. The system according to claim 19, wherein the selection unit comprises: The acquiring subunit is configured to acquire the network information of the available network of the terminal and the service demand information of the terminal according to the switching trigger instruction; The selection subunit is configured to select, according to the network information of available networks and terminal service requirement information acquired by the acquisition subunit, a switching network that meets the requirements of the terminal service to carry the terminal service. 21. A mobility management method, comprising: The trigger device generates a trigger command according to the requirements of the terminal business; When it is determined that the terminal is in the multi-connection state, sending a multi-connection management request message, the multi-connection management request message includes the network connection identification information of the terminal; The multi-connection management device receives the multi-connection management request message; According to the network connection identification information contained in the multi-connection management request message, obtain the existing connection network information and terminal service demand information that the terminal has currently accessed to the network; When it is determined according to the existing connection network information and terminal service demand information that there is no bearer network that meets the terminal service requirements in the currently accessed network of the terminal, return a multi-connection management request response message to the a triggering device, wherein the multi-connection management request response message includes indication information that an available network is used to bear the service of the terminal; The triggering device receives the multi-connection management request response message, and sends a handover trigger instruction according to the indication information that the available network is used to bear the service of the terminal; The switching device receives the switching trigger instruction; According to the handover triggering instruction, a handover network that meets the service requirements of the terminal is selected from the available networks of the terminal to carry the service of the terminal. 22. The method according to claim 21, wherein the trigger instruction includes network connection identification information of the terminal, and the triggering device judges whether the terminal is in a multi-connection state according to the network connection identification information. 23. The method according to claim 21, wherein the switching device selects a switching network that meets the requirements of the terminal service from the available networks of the terminal according to the switching trigger instruction to carry the terminal service, include: Obtaining network information of available networks of the terminal and terminal service requirement information according to the switching trigger instruction; According to the obtained network information of the available network and terminal service requirement information, a switching network meeting the requirement of the terminal service is selected to carry the terminal service. the

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