CN101674209B - Method and system for implementing network discovery - Google Patents
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Abstract
The embodiment of the invention discloses a method for implementing network discovery. The method comprises the following steps: receiving an access request sent by access equipment; according to the access request and information related to the network element, selecting a network element for the access equipment to access; and sending a selection result to the access equipment. The embodiment of the invention also discloses a system for implementing the network discovery. The method and the system can implement self-adaptive network discovery by selecting the network for accessing for the access equipment according to the changes of network state.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a system for implementing network discovery.
Background
In a wireless network communication system, with the development of the Internet (Internet) and the wide application of various wireless services, on one hand, users put higher demands on high bandwidth, convenience, low cost and the like of a wireless network; on the other hand, operators have developed demands for making full use of resources of existing networks, expanding capacity, reducing cost, and better providing services to users.
The wireless Access Point (AP) technology is proposed to fully meet the requirements of users and the development requirements of operators. The AP is a micro base station, and a mobile user may arrange the base station in a hot spot area such as a home or an office, and access a mobile communication network through the Internet to obtain a wireless communication service. The AP is introduced, so that the bottleneck problem of air interface resources of wireless services can be solved, and a user can enjoy high-speed and high-bandwidth network services; on the other hand, the AP is accessed through the Internet, so that the transmission cost of a mobile operator is saved, and the capacity of a mobile network is improved; in addition, the AP is mainly applied to hot spot areas such as families, office places and the like and blind spots in remote areas, so that the coverage of a mobile network is improved, and the quality of the network is optimized.
In the current mobile communication network, the connection and disconnection of network nodes need to fully consider the influence on user service and the influence on the whole network performance, so that the network planning and layout of an operator need to be considered, the network planning is performed in advance, and the network access and disconnection are completed according to the planned content. When an AP accesses a network through the Internet, a user starts the AP as needed anytime and anywhere, when the AP accesses the network, a related network element needs to be connected, a start parameter is set, and the network allocates a corresponding resource to the AP. After the AP is started, a process of correctly connecting network elements is known from nothing about the network, which is a process called network discovery.
However, in the course of the invention, the inventor finds that at least the following problems exist in the prior art: the states of the network elements in the network are dynamically changed, and the method for presetting the network element addresses in the AP or other devices needing to access the network cannot ensure the availability, the service quality, the service capability and other characteristics of the network elements in some core networks.
Disclosure of Invention
The embodiment of the invention provides a method and a system for realizing network discovery, which can select a network element which can be used for access equipment according to the change of the state of the network element, thereby realizing self-adaptive network discovery.
The embodiment of the invention provides a method for realizing network discovery, which comprises the following steps:
receiving an access request sent by access equipment;
selecting a network element which can be accessed by the access equipment according to the access request and the information of the relevant network element;
and sending the selection result to the access equipment.
The embodiment of the invention also provides a method for realizing network discovery, which comprises the following steps:
sending an access request to a home domain network element selection functional entity;
and receiving the information provided by the home domain network element selection functional entity, and establishing connection with the related network element.
The embodiment of the present invention further provides a system for implementing network discovery, where the system includes:
the access equipment is used for generating an access request;
and the network element selection unit is used for receiving the access request sent by the access equipment, selecting the network element which can be accessed by the access equipment according to the access request and the information of the relevant network element, and returning a selection result to the access equipment.
In the above technical solution, a network element available for access is selected according to an access request of the access device and information of a related network element, and a selected result is returned to the access device. Compared with the existing method for internally setting the network element address, the information of the related network element is updated in real time, so that the network element selected according to the information can be ensured in the characteristics of availability, service quality, service capability and the like, the network element which can be used for access can be selected for the access equipment according to the change of the network element state, and the self-adaptive network discovery is realized.
Drawings
Fig. 1 is a schematic flowchart illustrating a method for implementing network discovery according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a network architecture according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a network architecture according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a network architecture according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of a network architecture according to a fifth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a network architecture according to a sixth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a network architecture according to a seventh embodiment of the present invention;
fig. 8 is a schematic structural diagram of a network architecture according to an eighth embodiment of the present invention;
fig. 9 is a schematic structural diagram of a system for implementing network discovery according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a network selection unit according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a network selection unit according to an embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart illustrating a method for implementing network discovery according to an embodiment of the present invention. The method is applied to network devices (hereinafter referred to as access devices) which need network discovery, and the access devices may include but are not limited to APs, switches, routers, or the like. In this embodiment, the method includes the steps of:
s101, an access device sends an access request to a network element selection function entity (Selector) for configuring transmission parameters for the access device.
According to the control policy division of the operator access region, the access location of the access device may be in a home domain (i.e. home location) or in a non-home domain (i.e. visited location), so that the following three cases may be included in the sending of the access request by the access device to the Selector:
(1) when an access device embeds a Selector address in an access domain (including a home domain and a non-home domain), the access device directly sends an access request to a Selector in the access domain.
(2) When the access device embeds a Selector address in a home domain and accesses from a non-home domain, if the whole network only has a unique Selector, namely the Selector in the home domain and the Selector in the non-home domain are located in the same device, or the Selector in the home domain and the Selector in the non-home domain form a distributed system, but for the access device, only one visible Selector is provided, the access device directly sends an access request to the visible Selector.
(3) When an access device embeds a Selector address in a home domain and accesses from a non-home domain, the access device sends a query request to a first Selector (namely, the Selector in the home domain); the first Selector returns the address of the second Selector (i.e., the Selector in the non-home domain) to which the access device sends an access request.
The access request may include feature information of the access device, and the feature information may include, but is not limited to: access location, status, identification ID, version, manufacturer, domain, proximity, service characteristics, quality of service, load, and/or media support capability.
S102, the Selector selects a corresponding network element according to the access request and the information of the relevant network element.
In this step, the related network element refers to a device that the access device may need to connect after accessing the network, and may include, but is not limited to, an Auto-Configuration Server (ACS), a Security Gateway (SeGW), an access Gateway, a network Planning Server (Planning Server), a Software Server (Software Server), and/or a related auxiliary support system and a background service system, and the like.
Specifically, according to the access request and the information of the relevant network element, the network element is selected according to the following selection strategies or the combination strategy thereof:
(1) the load policy is that a Selector selects an entity with a relatively small load as a network element for establishing a connection, and such an entity can provide a good service for the access of the access device.
And applying a load strategy, wherein a Selector firstly obtains the current load of the network element according to the information of the relevant network element and then selects the relevant network element of which the current load meets the access request. When the Selector selects the relevant network element whose current load meets the access request, a load balancing algorithm or an operator load distribution strategy can be adopted:
if a load balancing algorithm is adopted, the Selector respectively distributes weights from large to small for the related network elements with the current loads from small to large; and selecting the network element corresponding to the access request by taking the weight as the priority.
If the operator load distribution strategy is adopted, the Selector processes the collected related network element information (mainly real-time information related to dynamic configuration), and dynamically executes the load distribution strategy according to the access request to obtain the related network element meeting the access request.
(2) The access location policy is to select an entity closest to an access area of the access device as a network element for establishing a connection.
Because the relevant network elements accessed by the access equipment may be deployed in each area divided by the operator, the network elements are selected according to the principle of proximity, and routing detour and time delay can be avoided.
And applying an access position strategy, acquiring the position of the network element by a Selector according to the information of the relevant network element, and then selecting the relevant network element with the position meeting the access request according to the principle of proximity.
(3) The qos policy is to select a network element in accordance with qos requirements (e.g., bandwidth, delay, etc.) of the access device for a certain type of service.
Applying a service quality strategy, acquiring the service quality of the network element by a Selector according to the information of the relevant network element, and then distributing the weight according to the similarity degree of the service quality of the relevant network element and the requirement of the access request, wherein the higher the similarity degree is, the larger the weight is; and selecting the network element corresponding to the access request by taking the weight as the priority.
(4) And the relevancy strategy is to select an entity with higher relevancy to the access equipment as a network element for establishing connection. The degree of correlation may include, but is not limited to: configuration correlation or domain correlation.
Wherein, the configuration correlation degree refers to: the access equipment has version (including software and hardware) and manufacturer differences, the differences can be embodied through the characteristic information, and the Selector can select related network elements (such as network element equipment or a back-end service system) to configure the access equipment according to the characteristic information;
the domain correlation means: the requirements of network topology and mobility management are met, and relevant network elements located in the same domain as the access device are given corresponding weight consideration during selection, for example: when the UE accesses the accessed device or the macro network, due to the movement of the UE, when the UE is switched from the access device to the macro base station or vice versa, there may be a handover across a serving gprs support node SGSN or a Mobile Switching Center (MSC), which causes a busy network and resource consumption. Therefore, when the access device accesses the network initially, an Access Gateway (AG) connected to the same core network element node as the macro base station adjacent to the access device should be considered for selection, and corresponding weight consideration is given during selection.
Applying a relevancy strategy, and firstly comparing the relevancy between the information of the relevant network element and the characteristic information in the access request by a Selector; then, distributing weights according to the correlation degree, wherein the higher the correlation degree is, the larger the weight is; and selecting the network element corresponding to the access request by taking the weight as the priority.
The process of selecting network elements by combining various policies can be specifically divided into two parts, namely: comparing the correlation degree of the information of the related network element and the characteristic information in the access request; and selecting the network element corresponding to the access request according to the weight of the correlation degree.
Further, according to the weight of the correlation, selecting a network element corresponding to the access request may employ the following method:
(1) eliminating the network element whose information of the related network element does not match the service characteristic and the media supporting capability in the access request; calculating the comprehensive weight of the matching degree of the access positions, the satisfaction degree of the service quality and the satisfaction degree of the versions in the excluded information of the related network elements; and selecting the network element corresponding to the access request by taking the magnitude of the comprehensive weight as the priority.
(2) Eliminating the network element whose information of the related network element does not match the service characteristic and the media supporting capability in the access request; and selecting the relevant network elements with the current loads meeting the access request from the excluded network elements.
(3) Eliminating the network element whose information of the related network element does not match the service characteristic and the media supporting capability in the access request; and selecting the network element with the minimum current load from the excluded network elements according to a load balancing algorithm or an operator load distribution strategy.
S103, returning the selection result to the access equipment, and then the access equipment accesses the relevant network element according to the selection result.
When the network element selected by the Selector in S102 is a single network entity, the selection result returned in this step is information of the network element; when the network elements selected by the Selector in S102 are multiple network entities, the selection result returned in this step is a list formed by information of the multiple network elements.
In this embodiment, when the information of the relevant network element is not preconfigured on the Selector, the following S102' may be executed before the Selector executes S102.
S102', the Selector obtains information of a relevant network element. Specifically, the Selector may obtain information of the relevant network element through passive reception or active collection.
Passive reception of information of a relevant network element by a Selector may include the following three cases:
(1) an information acquisition mechanism is added on a Selector, and the Selector receives information from related network elements regularly or irregularly.
(2) The Selector is distributed with collecting agents (agents) on each collecting object (namely, related network element), information subscription relation exists between the Selector and each Agent, and the Selector receives related network element information fed back by the agents according to a collecting plan; wherein, the collection plan can be designated by the Selector or set by other management systems; the acquisition plan may include, but is not limited to: the system comprises an acquisition period, acquisition contents, an acquisition reporting period, a data reporting mode, a data reporting address and/or a data acquisition strategy.
(3) The Selector increases an interface with the network element management entity so as to acquire the information of the relevant network element without collecting the information by self. The network element management entity is used for managing related network elements; the network element management entity may include, but is not limited to, a network manager or a management server, and the function of the existing network element management entity may be reused by using the manner of collecting the information of the relevant network elements.
The Selector in this step may also actively collect information of the relevant network elements. For example, the Selector may send a query request to the network element management entity when the change of the network state is monitored. And the network element management entity feeds back related network element information to the Selector according to the query request. The network state change may be that a new network element accesses the network, or that a state change of a related network element occurs, for example, a service quality, a service characteristic, a version, a media support capability, and/or a location of the related network element changes;
by adopting the technical scheme of the embodiment, for the access device, the Selector collects the information of the relevant network elements and selects the corresponding network elements according to the access request of the network device and the information of the relevant network elements, so that the self-adaptive network discovery can be realized according to the change state of the network elements.
The second embodiment of the present invention applies the method for implementing network discovery in the first embodiment to an AP. After the AP is started, since the situation of the accessed network is unknown, a process of discovering and establishing a connection with a network element related to the core network access is required, which is referred to as a network discovery process. The following describes the network discovery and access process by taking an AP access as an example, where the relevant network elements include an AP Access Gateway (AG), an ACS, and a SeGW:
referring to fig. 2, the APs and the associated network elements are shown in the form of groups, which indicates that there may be multiple options for each. The embodiment comprises the following steps:
And step 3, after receiving the AP access request and the reported characteristic information, the Selector selects a corresponding network element by combining with an operator strategy, and returns a selection result to the AP, wherein the selection result is used for indicating the access equipment to access the selected network element, such as the address, the state and other related parameters of the network element.
And step 4, the AP initiates a request to the selected network element according to the received selection result, and further completes the subsequent automatic configuration process of the AP.
The embodiment can realize network discovery of the AP. After the AP is started, it can obtain corresponding radio resources from the fact that it is unknown to the network that it can correctly connect to the network element related to the access, and complete the initialization process. Because the Selector can dynamically acquire the information of the relevant access network element, when the AP is accessed, the self-adaptive network discovery can be realized according to the state change of the relevant access network element.
In step 1 in the second embodiment, when the AP is started, the finding of the Selector may include:
1) the address or name of the Selector entity is built in the AP, and after the AP is started, the address or name is resolved by public network service to obtain the actual address of the Selector, which can be accessed by the AP.
2) The address of the security gateway is built in the AP, and the Selector address is obtained in the process of interacting with the security gateway.
3) The AP firstly finds a Dynamic Host Configuration Protocol (DHCP) server, and the DHCP server finds a first connectable Selector for the AP.
4) The address of the Selector to which the AP is to be connected is manually configured.
The AP may store the address or name of the Selector in the SIM-like card or be fixed in the AP hardware.
Through the method, the AP can find the corresponding Selector when being started, so that the subsequent network discovery process can be further carried out.
Third embodiment as shown in fig. 3, a Selector is used as an information collector, and an acquisition Agent (Agent) is distributed on each acquisition object.
There is an information Subscription relationship (Info Subscription) between the Selector and each Agent, the Subscription relationship is set by the Selector or other management system, each Agent will execute according to the set collection plan, and the set collection plan includes but is not limited to: 1) a collection cycle; 2) collecting content; 3) collecting a reporting period; 4) a data reporting mode; 5) data reporting addresses, etc.
By applying the methods provided in the third and fourth embodiments, the Selector can collect information of each network element in a targeted manner according to requirements (acquisition content, acquisition period, and the like).
Step 3 in the second embodiment may adopt the method provided in the fifth embodiment of the present invention, that is: the Selector determines the network elements that can be used by the access of the AP this time after comprehensive calculation in combination with the policies selected by the operator for the network elements, where the policies include the following policies or any combination thereof:
1. and determining the network elements which can be used by the access according to the current load of each network entity. That is, when the AP is accessed, an entity with relatively small load and capable of providing good service for the access of the AP should be selected, and corresponding weight consideration is given during selection;
the Selector may have a network element load balancing capability, and implement selection and task allocation for access to a relevant network element according to an existing load balancing algorithm.
Or, an operator load distribution policy is implemented on the Selector, and various collected network element information (mainly real-time information related to dynamic configuration) related to the AP access is processed, so as to dynamically perform policy control.
2. And determining a network element which can be used by the access according to the AP access position (Location). The network elements related to the AP access may be deployed in each area divided by the operator, and the network elements are selected according to the principle of proximity, that is, the access-related network element closest to the AP access area should be selected to establish connection, so that routing detour and time delay can be avoided.
3. The network elements that can be used for access are determined according to the quality of service (QoS) of the network entity. When the AP accesses, it may declare the service quality requirements for some kind of service, such as bandwidth, delay, etc., and when selecting the network element, it may give corresponding weight to the requirements.
4. The network elements that can be used for access are determined according to the version (hardware or software) of the AP and vendor differences. When the AP accesses, the Selector may give a corresponding weight consideration to the network element suitable for the version according to the version information of the AP.
5. See fig. 5, network topology and mobility management requirements. When the UE is accessed to the AP or the macro network, due to the movement of the UE, when the AP is switched to the macro base station or vice versa, the switching across the SGSN or the MSC is possible, so that the network is busy and the resource consumption is caused. Therefore, at the initial time of accessing the network by the AP, the selection of an Access Gateway (AG) connected to the same core network element CN Node2 as the neighboring macro base station of the AP should be considered. When selecting a network element, the requirements may be given corresponding weight consideration.
The present embodiment provides a plurality of network element selection policies, and the Selector may select and apply one or more of the above policies according to actual needs. If the multiple strategies are applied, priorities can be set for different strategies according to requirements, weights can also be set for each strategy, all network elements are weighted and scored according to the weight settings, and the network element with the higher weighted score is used as a selection result. For example, the Selector may adopt a load policy and an access location policy, and then the Selector may set the priority of the load policy to be slightly higher than the priority of the access location policy, preferentially select a network element with a smaller load, and for a network element to be selected with the same load, how to select the network element according to the access location may be determined. It should be noted that various specific ways of applying policies are applicable to the embodiments of the present invention.
The embodiment of the invention also provides a method for realizing network discovery, which comprises the following steps: the access equipment firstly sends an access request to a home domain network element selection functional entity, and if a selection result provided by the home domain network element selection functional entity is received, the access equipment establishes connection with a related network element; if the access equipment receives the information of the visiting domain network element selection functional entity provided by the home domain network element selection functional entity, the access equipment sends an access request to the visiting domain network element selection functional entity, and then establishes connection with the related network element according to the selection result provided by the visiting domain network element selection functional entity.
Several processing schemes for adaptive discovery, i.e., access, when the AP is in a non-home domain are described in detail below through embodiments six to eight.
Example six:
in the second embodiment of the present invention, the position and the working mode of the Selector may be unique in the whole network. For example, when the AP accesses from a non-home domain (which is an area divided by an operator access domain control policy), the Selector is responsible for allocating a relevant network element of an access area to the AP. As shown in fig. 6, in this embodiment, there may be a distributed system inside the Selector, but only one visible Selector is seen from the AP, and the Selector can know the specific access-related network element conditions of area a (area a) and area b (area b). Specifically, the meaning of each step shown in the figure is as follows:
after the AP starts, after receiving an AP start request, selecting an access-related network element that meets the requirements for the AP according to the algorithm policy described in the fifth embodiment, and returning the result to the AP.
The AP determines the selected network element and establishes a connection with the selected network element.
Example seven:
the Selector in the second embodiment of the present invention may also be deployed in each area in a decentralized manner, and when the AP accesses from the non-home domain, the AP first queries the Selector in the home domain. The seventh embodiment of the invention is shown in fig. 7, wherein the meaning of each step in the figure is as follows:
an AP queries (for example) according to a Selector a address of a built-in home Area (Area a) and the Selector a, and reports feature information of the AP.
And 2, judging the AP access position to be a different area B (area B) by the Selector A, and inquiring the network element information of the access area from the Selector B.
And 3, the Selector A executes the strategy of the network element selection of the operator according to the network element information related to the access area, obtains the selection result and returns the selection result to the AP.
And 4, the AP determines the selected network element and establishes connection with the selected network element.
Example eight:
as shown in fig. 8, the difference between the embodiment and the seventh embodiment is that, when an AP accesses from a non-home domain, the AP acquires the Selector in the non-home domain through the Selector in the home domain, and then performs a further network element selection process, where the meaning of each step in the figure is as follows:
the AP inquires according to a Selector A address of a built-in home Area (Area A) and the Selector A, the Selector A judges that the access position of the AP is an Area B at a different place, and the address of the Selector B is returned to the AP.
And 2, the AP is connected with a Selector B, the AP characteristic information is reported, the Selector B executes the strategy of the operator about the network element selection, and the result is returned to the AP.
And 3, the AP determines the selected network element and establishes connection with the selected network element.
For the cases where the selectors are distributed and deployed in each region in the seventh embodiment and the eighth embodiment, the method for determining the local (non-home domain) Selector B by the Selector a in the home domain according to the access location of the AP may include the following two methods:
1. each region Selector saves and updates the region and address corresponding information of other selectors, so that the Selector corresponding to the access region is found according to the access position of the AP.
2. The network has a medium position query function entity, the medium entity stores the corresponding information of the Selector and the region, and each Selector can query the Selector corresponding to the region by providing the region identifier for the entity.
As shown in fig. 9, a ninth embodiment of the present invention provides a system for implementing network discovery, where the system includes:
the access device 910 is configured to generate an access request and receive a selection result sent by the network element selecting unit 920;
a network element selecting unit 920, configured to receive the access request sent by the access device 910, select a network element accessible by the access device according to the access request and information of the relevant network element, and return a selection result to the access device 910.
Further, the network element selecting unit 920 may include the following structures:
as shown in fig. 10, the first structure may include:
an acquisition Agent (Agent)921 for acquiring information of the relevant network element; the collection agent may be set on a corresponding related network element;
a network element selecting functional entity (Selector)922, configured to receive the access request sent by the access device 910, select a network element accessible by the access device according to the access request and the information of the relevant network element reported by the acquisition agent 921, and return a selection result to the access device 910.
As shown in fig. 11, the second structure may include: a network element selection function (Selector)923 and a network element management entity 924.
A network element selection function entity (Selector)923, configured to send an inquiry request to a network element management entity when it is monitored that a network state changes, and receive related network element information fed back by the network element management entity according to the inquiry request; receiving an access request sent by the access device 910, selecting a network element accessible by the access device according to the access request and information of the relevant network element fed back by the network element management entity 924, and returning a selection result to the access device 910.
As shown in fig. 11, the network element management entity 924 is configured to receive the query request sent by the network element selecting function entity 923, and feed back information of a relevant network element.
In the system for realizing network discovery, only one of the above two configurations may be present, or not only one may be present.
Further, when the access device 910 is located in the visited domain, the access device is further configured to generate an inquiry request, and send the inquiry request to the home domain network element selection functional entity;
when the network element selecting functional entity 920 is a home domain device of the access device, the network element selecting functional entity is further configured to return an address of the network element selecting functional entity located in the access device visiting domain to the access device according to the query request from the access device.
The system for realizing network discovery collects the information of the relevant network elements through the network element selection functional entity, selects the corresponding network elements according to the access request of the access equipment and the information of the relevant network elements, and provides the selection result to the access equipment, wherein the selection result is updated along with the change of the network element state, so that the self-adaptive network discovery of the access equipment can be realized.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus a necessary hardware platform, and may also be implemented by hardware entirely. With this understanding in mind, all or part of the technical solutions of the present invention that contribute to the background can be embodied in the form of a software product, which can be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes instructions for causing a computer device (which can be a personal computer, a server, a network device, etc.) to execute the methods according to the embodiments or some parts of the embodiments of the present invention.
The foregoing is directed to embodiments of the present invention, and it is understood that various modifications and improvements can be made by those skilled in the art without departing from the spirit of the invention.
Claims (17)
1.A method for implementing network discovery, the method comprising:
receiving an access request sent by access equipment, and acquiring characteristic information of the access equipment; the access equipment is network equipment needing network discovery;
selecting a network element which can be accessed by the access equipment according to the access request and the information of the relevant network element;
and sending the selection result to the access equipment.
2. The method of claim 1,
the selection result is a list formed by the information of one relevant network element or the information of a plurality of relevant network elements.
3. The method of claim 1, wherein the access request includes information about characteristics of the access device.
4. The method of claim 3, wherein the feature information comprises: access location, status, identification ID, version, manufacturer, domain, proximity, service characteristics, quality of service, load, and/or media support capability.
5. The method according to claim 4, wherein the selecting the network element accessible to the access device specifically includes:
comparing the correlation degree of the information of the related network element and the characteristic information in the access request;
and selecting the network element corresponding to the access request according to the weight of the correlation degree.
6. The method of claim 5, wherein the selecting the network element corresponding to the access request according to the weight of the correlation comprises:
eliminating the network element whose information of the related network element does not match the service characteristic and the media supporting capability in the access request;
calculating the comprehensive weight of the matching degree of the access positions, the satisfaction degree of the service quality and the satisfaction degree of the versions in the excluded information of the related network elements;
and selecting the network element corresponding to the access request by taking the magnitude of the comprehensive weight as the priority.
7. The method of claim 5, wherein the selecting the network element corresponding to the access request according to the weight of the correlation comprises:
eliminating the network element whose information of the related network element does not match the service characteristic and the media supporting capability in the access request;
and selecting the relevant network elements with the current loads meeting the access request from the excluded network elements.
8. The method of claim 5, wherein the selecting the network element corresponding to the access request according to the weight of the correlation comprises:
eliminating the network element whose information of the related network element does not match the service characteristic and the media supporting capability in the access request;
and selecting the network element with the minimum current load from the excluded network elements according to a load balancing algorithm or an operator load distribution strategy.
9. The method of claim 1, wherein prior to selecting the network element accessible to the access device, the method further comprises:
acquiring information of a relevant network element through an acquisition agent residing on the relevant network element; or,
and acquiring the information of the relevant network element through the network element management entity.
10. The method of claim 9, wherein obtaining information about the relevant network element via an acquisition agent residing on the relevant network element comprises:
receiving the information of the relevant network elements reported by the collection agent at regular time according to the subscription relationship; or,
and receiving the information reported by the collection agent when the state of the relevant network element changes.
11. The method of claim 10,
the state change of the related network element comprises: the quality of service, service characteristics, version, media support capability and/or location of the associated network element changes.
12. The method of claim 9, wherein the obtaining information about the relevant network element by the network element management entity comprises:
when the change of the network state is monitored, sending an inquiry request to a network element management entity;
and receiving the information of the relevant network element sent by the network element management entity.
13. The method of claim 12,
the network state change comprises: the state of the relevant network element changes or a new network element accesses the network.
14. A method for implementing network discovery, the method comprising:
sending an access request to a home domain network element selection functional entity to obtain the characteristic information of the access equipment;
and receiving the information provided by the home domain network element selection functional entity, and establishing connection with the related network element.
15. The method of claim 14, wherein the information is a selection result or visited domain network element selection function entity information.
16. The method of claim 15, wherein when the information is information of selecting a functional entity for a visited domain network element, the process of establishing a connection with a relevant network element comprises:
sending an access request to a network element selection functional entity of the visit domain;
and establishing connection with the related network element according to the selection result provided by the visited domain network element selection functional entity.
17. A system for implementing network discovery, the system comprising:
the access equipment is used for generating an access request and receiving a selection result sent by the network element selection unit; the access equipment is network equipment needing network discovery; and the network element selection unit is used for receiving the access request sent by the access equipment, acquiring the characteristic information of the access equipment, selecting the network element which can be accessed by the access equipment according to the access request and the information of the relevant network element, and returning a selection result to the access equipment.
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| CN102684951B (en) * | 2011-03-14 | 2015-08-05 | 鸿富锦精密工业（深圳）有限公司 | The system of selection of many Wide Area Network interface networking, system and network equipment |
| CN103945411B (en) * | 2014-03-31 | 2018-01-12 | 华为技术有限公司 | A kind of method and device for choosing Network Access Point |
| CN106485419B (en) * | 2016-10-18 | 2021-01-19 | 财付通支付科技有限公司 | Secondary resource management method and device |
| WO2019047117A1 (en) * | 2017-09-07 | 2019-03-14 | Oppo广东移动通信有限公司 | Network access method, terminal device and network device |
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| CN101087301A (en) * | 2006-09-07 | 2007-12-12 | 华为技术有限公司 | Method and system for user access to network |
| WO2008095899A1 (en) * | 2007-02-05 | 2008-08-14 | Nokia Siemens Networks S.P.A. | Method of negotiation of access network services between network elements operating according to the same or different access technologies |
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| CN101087301A (en) * | 2006-09-07 | 2007-12-12 | 华为技术有限公司 | Method and system for user access to network |
| CN101035375A (en) * | 2007-02-02 | 2007-09-12 | 华为技术有限公司 | Self-adaptive communication system, terminal, method and access point |
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