WO2016106598A1

WO2016106598A1 - Method and apparatus for selecting access network

Info

Publication number: WO2016106598A1
Application number: PCT/CN2014/095649
Authority: WO
Inventors: 尹长川; 武霄泳; 于琦
Original assignee: 华为技术有限公司
Priority date: 2014-12-30
Filing date: 2014-12-30
Publication date: 2016-07-07
Also published as: CN107211479B; CN107211479A

Abstract

Provided in the embodiments of the present invention are a method and apparatus for selecting an access network in a one Machine to Machine (oneM2M) system. The method for selecting an access network comprises: acquiring bottom layer network information of a bottom layer Network Service Entity (NSE), the bottom layer network information comprising an access network identifier of each access network in a plurality of access networks supported by the NSE and Point of Access information of each access network; according to the bottom layer network information, determining the cost of each access network in the plurality of access networks; selecting an access network with a minimum cost as a target access network from the plurality of access networks; and updating the Point of Access information of a currently used access network, saved in a Point of Access (PoA) attribute, as the Point of Access information of the target access network. The method and apparatus for selecting an access network in the oneM2M system provided in the embodiments of the present invention can select the access network with the minimum cost as the target access network from the plurality of access networks under the condition that the NSE supports the plurality of access networks.

Description

Method and device for selecting an access network

Technical field

Embodiments of the present invention relate to the field of communications, and in particular, to a method and apparatus for selecting an access network in a unified machine-to-machine system.

Background technique

With the development of the Internet of Things technology, the Global Standards Organization unified machine to machine (English: one Machine to Machine, referred to as: oneM2M) was established, which aims to efficiently deploy machine to machine (English: Machine to Machine, referred to as: M2M) Communication system to promote the integration of M2M global standards and industry applications. The existing oneM2M system adopts a layered architecture. The entire architecture is divided into an application layer (English: Application Layer), a common service layer (English: Common Service Layer), and an underlying network service layer (English: Network Service Layer). The application entity (English: Application Entity, ee for short) contains the instantiated one-to-one oneM2M solution; the public service entity (Common Service Entity, CSE for short) in the public service layer contains instantiated public service functions. The underlying network entity (English: Network Service Entity, NSE for short) in the underlying network service layer provides underlying network support to the public service layer. In the existing oneM2M system, communication between the application entity, the public service entity, and the underlying network service entity is completed through a unified interface, and is compatible with different underlying access networks.

However, the current oneM2M system only considers the basic requirements of the underlying network access, but does not consider the selection problem when using multiple types of access networks.

Summary of the invention

In view of this, the embodiments of the present invention provide a method and device for selecting an access network in a unified machine-to-machine oneM2M system, which is used to solve the problem that the current oneM2M system does not support multiple types of access networks.

The first aspect provides a method for selecting an access network in a oneM2M system, including: acquiring underlying network information of an NSE, where the underlying network information includes access of each of the multiple access networks a network identifier and access point information of each access network; determining, according to the underlying network information, a cost of each of the plurality of access networks; selecting a cost from the plurality of access networks The smallest access network serves as the target access network; the current access network saved in the PoA attribute of the access point The access point information is updated to the access point information of the target access network, where the PoA attribute is located under the CSE basic resource of the CSE.

With reference to the first aspect, in the first implementation manner, the acquiring the underlying network information of the NSE includes: acquiring the access network identifier of each access network; and sending the each to the NSE a resource request message of the access network, where the resource request message of each access network includes an access network identifier of each access network, and the resource request message of each access network is used for requesting a location Returning NSE to the access point information of each access network; receiving access point information of each access network returned by the NSE; creating each access network under the CSE basic resource The NSE resource of each access network is used to store an access network identifier of each access network and access point information of each access network.

With reference to the first aspect or the first implementation of the first aspect, in a second possible implementation manner of the first aspect, the determining, according to the underlying network information, determining each of the multiple access networks The cost of the access network includes: determining a priority of each access network according to an access network identifier of each access network in the underlying network information; determining, according to a priority of each access network The cost of each access network is higher, and the higher the priority of each access network is, the smaller the cost is; the access point policy PoAPolicy resources of each access network are created under the CSE basic resource, The access point policy PoAPolicy resource of each access network is used to save the access network identifier of each access network and the cost of each access network.

With reference to the first aspect, or the first implementation of the first aspect, in a third possible implementation manner of the first aspect, the determining, according to the underlying network information, determining each of the multiple access networks The cost of the access network includes: determining, according to the access point information of each access network in the underlying network information, a delay of each access network; according to the delay of each access network Determining the cost of each access network, the smaller the delay of each access network, the lower the cost; creating the PoAPolicy resource of each access network under the CSE basic resource, The PoAPolicy resource of each access network is used to store the access network identifier of each access network and the cost of each of the access networks.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the method includes: sending a test data packet to each access network separately; Response messages of the access network to the test data packet to determine a response time between the test data packet and each of the access networks; according to the test data packet and each of the access network The response time determines the delay of each of the access networks.

With reference to the first aspect and the first to fourth possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the method includes: creating a current access under the CSE basic resource The active POAPolicy resource is used to indicate that the cost of each access network is determined according to the delay or priority of each access network.

The second aspect provides a device for selecting an access network in a unified machine-to-machine oneM2M system, including: a transceiver unit, configured to acquire underlying network information of an underlying network service entity NSE, where the NSE supports multiple access networks, The multiple access networks adopt different access network technologies, where the underlying network information includes an access network identifier of each of the multiple access networks and an access of each access network. And a determining unit, configured to determine, according to the underlying network information, a cost of each of the multiple access networks; and a selecting unit, configured to select a cost from the multiple access networks The minimum access network is used as the target access network; the saving unit is configured to update the access point information of the currently used access network saved in the PoA attribute of the access point to the access point information of the target access network, The PoA attribute is located under the CSE basic resource of the public service entity CSE.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the transceiver unit is specifically configured to: obtain the access network identifier of each access network; and send the identifier to the NSE a resource request message of each access network, where the resource request message of each access network includes an access network identifier of each access network, and a resource request message of each access network is used for And requesting, by the NSE, the access point information of each access network to be received; receiving the access point information of each access network returned by the NSE; creating the each connection under the CSE basic resource The NSE resources of the access network are used to save the access network identifier of each access network and the access point information of each access network.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect, the determining unit is specifically configured to: according to each of the bottom layer network information The access network identifier of the access network determines the priority of each access network; the cost of each access network is determined according to the priority of each access network, and the priority of each access network The higher the level, the lower the corresponding cost; the access point policy PoAPolicy resource of each access network is created under the CSE basic resource, and the access point policy PoAPolicy resource of each access network is used for saving the location The access network identifier of each access network and the cost of each of the access networks.

With the second aspect or the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the determining unit is specifically configured to: according to the foregoing in the underlying network information The access point information of the access networks determines the delay of each access network; according to each of the connections The delay of the access network determines the cost of each access network, and the smaller the delay of each access network is, the smaller the cost is; the PoAPolicy of each access network is created under the CSE basic resource. The resource, the PoAPolicy resource of each access network is used to save the access network identifier of each access network and the cost of each access network.

With reference to the third possible implementation of the second aspect, in a fourth possible implementation manner of the third aspect, the determining unit is further configured to: separately send a test data packet to each access network; Determining, by each access network, a response message to the test data packet to determine a response time between the test data packet and each of the access networks; and according to the test data packet and each of the access The response time of the network determines the delay of each of the access networks.

With reference to the second aspect or the first to fourth possible implementation manners of the second aspect, in a fifth possible implementation manner of the second aspect, the saving unit is specifically configured to: create a current connection under the CSE basic resource The ingress policy is an activePoAPolicy resource, where the activePoAPolicy resource is used to indicate that the cost of each access network is determined according to the delay or priority of each access network.

The embodiment of the present invention determines the cost of each access network of the multiple access networks supported by the underlying network service entity by acquiring the underlying network information of the underlying network service entity in the oneM2M system, thereby being able to select from multiple access networks. The access network with the lowest cost is used as the target access network. In the above manner, the selection problem of multiple access networks in the oneM2M system can be flexibly solved. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

FIG. 1 is a schematic diagram of a scenario of a oneM2M system according to an embodiment of the present invention.

2 is a flow chart of a method for selecting an access network in a oneM2M system according to an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a CSE basic resource in a oneM2M system according to an embodiment of the present invention.

FIG. 4 is a schematic flowchart of a process of selecting an access network in a oneM2M system according to an embodiment of the present invention.

FIG. 5 is a schematic flowchart of selecting an access network in a oneM2M system according to another embodiment of the present invention.

FIG. 6 is a schematic flowchart of selecting an access network in a oneM2M system according to another embodiment of the present invention.

7 is a schematic block diagram of an apparatus for selecting an access network in a oneM2M system according to an embodiment of the present invention.

FIG. 8 is a schematic block diagram of an apparatus for selecting an access network by a oneM2M system according to another embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.

FIG. 1 is a schematic diagram of a system scenario of an embodiment of the present invention.

The oneM2M system applicable to the embodiment of the present invention adopts a layered model as shown in FIG. 1, and includes an application layer 110, a common service layer 120, and an underlying network service layer 130. The application entity (AE) in the application service layer 110 contains an instantiated end-to-end solution; the public service entity (CSE) in the common service layer 120 contains instantiated public service functions; the underlying network in the underlying network service layer 130 The Service Entity (NSE) provides underlying network support to the public service layer.

The user service domain (local domain) includes an application entity 111, a public service entity 121, and an underlying network service entity 131. The application entity 111 and the public service entity 121 communicate with the application entity interface (Mca interface) through the public service entity; the public service entity 121 and the underlying network service entity 131 interface with the underlying network service entity through the public service entity (Mcn interface) ) to communicate.

The public service domain also includes three entities, an application entity 112, a public service entity 122, and an underlying network service entity 132. The application entity 112 communicates with the public service entity 122 via the Mca interface; the public service entity 122 communicates with the underlying network service entity 132 via the Mcn interface. In addition, the public service entity 121 in the user service domain communicates with the public service entity 122 in the public service domain via a public service entity and a public service entity interface (Mcc interface).

In the oneM2M system, all entities (such as AE, CSE, data, etc.) can be represented in the form of resources. The resource structure defines in detail how the resources are represented and defines how to get them. In the oneM2M system, the access point (English: Point of Access, PoA) attribute located in the CSE basic resource structure stores the access point information of the currently used access network supported by the underlying network service entity NSE. The access point information stored in the PoA attribute can be updated according to changes in the underlying access network to implement switching of the access network.

In the future development of the Internet of Things, oneM2M system will cover more and more application scenarios, and business requirements will be more diverse. Many network devices have the ability to be compatible with multiple underlying access networks (such as 3GPP, WiFi, and BlueTooth). The service capabilities and data bearer mechanisms of different underlying access networks vary widely. This requires that the oneM2M system should have the ability to select the most preferred access network based on application requirements and compatible underlying networks.

The PoA attribute of the above CSE basic resource structure stores the access point information of the current access network supported by the underlying network service entity. Although the basic requirements of the underlying network access are guaranteed, when the underlying network service entity supports multiple connections at the same time, When entering the network, the public service entity cannot independently select a target access network from the multiple access networks. Specifically, supporting the multiple access networks by the underlying network service entity means that a plurality of access networks currently have access to the underlying network service entity.

The method for selecting an access network provided by the embodiment of the present invention determines the cost of each of the plurality of access networks supported by the underlying network service entity by acquiring the underlying network information of the underlying network service entity in the oneM2M system, thereby enabling The access network with the least cost is selected from the multiple access networks as the target access network. In the above manner, the selection problem of multiple access networks in the oneM2M system can be flexibly solved. 2 is a flow chart of a method of selecting an access network in a oneM2M system according to an embodiment of the present invention. The method 200 of FIG. 2 is performed by a device in the oneM2M system that selects an access network, and in particular, may be performed by a public service entity (eg, the public service entity 121 or the public service entity 122 in FIG. 1).

210. Obtain underlying network information of an underlying network service entity, where the underlying network service entity supports multiple access networks, where the multiple access networks adopt different access network technologies, where the underlying network information includes multiple access networks. The access network identifier of each access network and the access point information of each access network.

220. Determine, according to the underlying network information, a cost of each of the plurality of access networks.

230. Select the least expensive access network from the multiple access networks as the target access network.

240. Update the access point information of the currently used access network saved in the PoA attribute of the access point to the access point information of the target access network, where the PoA attribute is located at the CSE basis of the public service entity CSE. Under the resources.

The method for selecting an access network provided by the embodiment of the present invention determines the cost of each of the plurality of access networks supported by the underlying network service entity by acquiring the underlying network information of the underlying network service entity in the oneM2M system, thereby enabling The least expensive access network is selected from the plurality of access networks as the target access network, and the foregoing manner can flexibly solve multiple access networks in the oneM2M system. Choose the problem. It should be understood that the method shown in FIG. 2 may occur when the AE initiates an application request, or may occur before the AE initiates an application request, which is not limited in the present invention.

In step 210, the underlying network information includes an access network identifier of each of the plurality of access networks and access point information of each access network. Specifically, the underlying network information of the underlying network service entity may be represented by creating an underlying network service entity resource NSE under the CSE basic resource. As shown in FIG. 3, an NSE resource is created under the CSE basic resource, where the NSE resource includes a sub-resource NSE _i indicating network information of the i-th access network in each access network (the i-th access network may represent the bottom layer) Any access network in the network). The NSE _i resource further includes an access network identifier (NetworkID _i ) attribute of the i-th access network, where the NetworkID _i attribute is used to indicate an access network identifier of the i-th access network; and the sub-resource NSE _i is further The access point (PoA _i ) attribute of the i-th access network is included, and the PoA _i attribute is used to indicate access point information of the i-th access network. Specifically, the access point information of each access network refers to a physical address list required for each access network to access the CSE, so the PoA _i attribute is used to indicate the access of the i-th access network. The point information means that the physical address list of the i-th access network is recorded in the PoA _i attribute. For example, when the access network is a Bluetooth network, it corresponds to the Mac address of the Bluetooth access network. When the access network is WIFI, it corresponds to the IP address of the WIFI access network. It should be understood that the sub-resource NSE _i may include other resources and/or attributes in addition to the NetworkID _i attribute and the PoA _i attribute, and the like, and the resource form of other access networks, and the present invention is not limited thereto.

Optionally, as an embodiment of the present invention, when obtaining the underlying network information in the underlying network service entity in step 210, the method may be performed as follows: acquiring an access network identifier of each access network; and providing an underlying network service entity to the underlying network service entity Sending a resource request message of each access network, where the resource request message of each access network includes an access network identifier of each access network, and the resource request message of each access network is used to request an underlying network The serving entity returns the access point information of each access network; receiving the access point information of each access network returned by the underlying network service entity; creating the each under the CSE basic resource NSE resources of the access network, and the access network identifier of each access network and the access point information of each access network are stored in the NSE resources of each access network. Specifically, the resource request message Request _{i of} the i-th access network is sent to the NSE, where the resource request message Request _i includes the access network identifier NetworkID _{i of} the i-th access network, and the resource request message Request _{i is} used for The NSE is requested to return the access point information corresponding to the i-th access network. In the above manner, the resource request message of each access network in the NSE is sent once in a traversal manner, and the access point information of each access network is obtained, and the foregoing NSE resources are established, that is, the foregoing network service is obtained. The underlying network information in the entity.

Optionally, as an embodiment of the present invention, determining, according to the underlying network information, a cost of each of the multiple access networks, including: receiving, according to each access network in the underlying network information The access identifier determines the priority of each access network; the cost of each access network is determined according to the priority of each access network, and the priority of each access network is higher. The lower the cost; the access point policy PoAPolicy resources of each access network are created under the CSE basic resources, and the access network identifiers of each access network and each of the access networks are The cost is stored in the access point policy resource of each access network.

Specifically, as shown in FIG. 3, an access point policy (PoAPolicy) resource may be created under the CSE basic resource to represent the cost of each access network, so as to select the minimum cost according to the access point cost of each access network. The access network serves as the target access network. The PoAPolicy resource includes a sub-resource indicating an i-th access network policy (PoAPolicy _i ) in each access network, and the PoAPolicy _i resource further includes an access network identifier NetworkID _i attribute for indicating the i-th access network. And a cost function value (FunctionValue _i ) attribute of the i-th access network, where the FunctionValue _i attribute is used to indicate a cost size of the i-th access network in the underlying network.

It should be understood that the sub-resource PoAPolicy _i may include other resources and/or attributes in addition to the NetworkID _i attribute and the FunctionValue _i attribute, and the like, and the resource form of each access network, and the present invention is not limited thereto.

Specifically, based on the foregoing resource structure, the priority of the i-th access network may be determined according to the NetworkID _i attribute, and the cost of the i-th access network may be obtained by the priority of the i-th access network, where the The cost of the i-access network may be stored in the FunctionValue _i attribute of the PoAPolicy _i resource by an equivalent transformation to determine the PoAPolicy _i resource of the i-th access network. It should be understood that the higher the priority of the access network, the lower the cost of the access network; conversely, the lower the priority of the access network, the greater the cost of the corresponding access network. According to the foregoing manner, each access network in the NSE is processed in a traversal manner, and the access point policy resource of each access network in the CSE basic resource is obtained, that is, the PoAPolicy resource in the CSE basic resource structure is obtained. By comparing the cost function value of each access network in the PoAPolicy resource, the access network with the lowest cost can be selected as the target access network.

It should be understood that determining the cost of each access network according to the priority of each access network includes multiple manners, such as, but not limited to, obtaining each connection according to a priority parameter set by default of each access network. The cost of accessing the network; or determining the access network according to the characteristic information of each access network Priority, and then the cost per access network is obtained according to the priority of each access network, and the present invention is not limited thereto.

Optionally, as an embodiment of the present invention, as shown in FIG. 3, an active access point policy (activePoAPolicy) resource is added to the CSE basic resource to indicate an access point policy of the currently used access network, where the activePoAPolicy indicates an application. Which policy (for example, according to the delay parameter or priority parameter of the access network) determines the cost of the access network, and the activePoAPolicy resource is associated with the above PoAPolicy resource.

Optionally, as an embodiment of the present invention, determining, according to the underlying network information, a cost of each of the multiple access networks, including: receiving, according to the access network in the underlying network information The in-point information determines the delay of each access network; the cost of each access network is determined according to the delay of each access network, and the delay of each access network is smaller. The lower the cost; the PoAPolicy resources of each access network are created under the CSE basic resources, and the access network identifier of each access network and the cost of each access network are saved in The PoAPolicy resource of each access network.

Specifically, as shown in FIG. 3, an access point policy (PoAPolicy) resource may be created under the CSE basic resource to represent the cost of each access network of the underlying network, so as to facilitate the access point cost according to each access network. The access network with the lowest cost is selected as the target access network. In FIG. 3, the PoAPolicy resource includes a sub-resource representing an i-th access network policy (PoAPolicy _i ) in each access network, and the PoAPolicy _i resource further includes an access for indicating an i-th access network. The network identifier NetworkID _i attribute and the cost function value (FunctionValue _i ) attribute of the i-th access network, the FunctionValue _i attribute is used to indicate the cost of the i-th access network in the underlying network.

Specifically, the network ID _i attribute indicating the access network identifier of the i-th access network in the NSE _i resource or the PoAPolicy _i resource, and the PoA _i attribute indicating the access point of the i-th access network in the NSE _i resource, Obtaining a delay of the i-th access network, determining a cost of the i-th access network by using a delay of the i-th access network, and performing an equivalent change of the cost in a value form in the PoAPolicy _In the FunctionValue _i property under the _i resource. According to the above manner, each access network in the underlying network is processed in a traversal manner, and the delay of each access network in the NSE can be obtained, and each access network is obtained according to the delay of each access network. The cost, and the equivalent substitution is stored in the value function value of each access network in the form of a value, so that the PoAPolicy resource under the CSE basic resource can be obtained by comparing each access network in the PoAPolicy resource. The cost of choosing the least expensive access network as the target access network.

It should be understood that when the delay of the access network is larger, the cost of the access network is larger; conversely, the smaller the delay of the access network is, the smaller the cost of the access network is.

Optionally, as an embodiment of the present invention, determining a time delay of each access network may be performed according to the following steps: separately sending test data packets to each access network; receiving each access Responding to the test data packet by the network to determine a response time between the test data packet and each of the access networks; determining according to the response time of the test data packet and each access network The delay of each access network.

Specifically, the test data packet is sent to the i th access network according to the access point PoA _i attribute of the i th access network; and the response message of the i th access network to the test data packet is received to determine the test. The response time between the data packet and the i-th access network, the response time is the time from the issuance of the test data packet to the receipt of the response message of the i-th access network to the test data packet, according to the The response time of the i access network to the test data packet can determine the delay of the i th access network. According to the above manner, each access network in the underlying network is processed in a traversal manner, and the delay of each access network in the NSE can be obtained, and each access network is determined according to the delay of each access network. The cost and the equivalent cost are stored in the value function value resource of each access network, so that the PoAPolicy resource under the CSE basic resource can be obtained by comparing each access network of the PoAPolicy resource. At the cost, the access network with the lowest cost is selected as the target access network.

For step 240, the process of specifically storing the access point information of the target access network is as follows. For example, the PoA attribute stored in the access point PoA attribute is the mth access point PoA _m attribute of the mth access network currently accessing the CSE. In the access point information, after comparing the costs of all the multiple access networks supported by the underlying network service entity, the nth access network with the least cost is selected as the target access network, and the nth access network The access point information is stored in the nth access point PoA _n attribute, and the nth access network is accessed by updating the information in the PoA attribute of the access point to the access point information in the PoA _n attribute. The target access network, it should be understood that the present invention is not limited thereto.

Optionally, as an embodiment of the present invention, selecting the least expensive access network from the multiple access networks as the target access network includes: only one access network exists in the underlying network (for example, the i th An access network, when only the sub-resource NSE _{i of} the i-th access network exists in the NSE resource, the access point information stored in the PoA _i attribute of the unique sub-resource NSE _i is updated to the access point PoA. In the attribute, the only access network is selected as the target access network.

The method for selecting an access network according to an embodiment of the present invention is described in detail above with reference to FIG. 1 to FIG. 3, and will be described from the perspective of interaction between an application entity, a public service entity, and an underlying network service entity in conjunction with FIG. 4 to FIG. A method of selecting an access network in accordance with an embodiment of the present invention.

4 is a schematic flow chart of selecting an access network in a oneM2M system according to an embodiment of the present invention, showing a schematic flow chart when a local AE or CSE (AE/CSE 410 in the figure) and a remote CSE 420 perform data transmission.

401. Obtain the underlying network information. Specifically, the underlying network information of the underlying network service entity is obtained, and the underlying network service entity supports multiple access networks, and the underlying network information includes an access network identifier and each access of each of the multiple access networks. Network access point information.

402. Determine a cost function value of each access network in the underlying network. Specifically, the priority of each access network may be determined according to an access network identifier of each access network in the underlying network information, and then the cost of each access network is determined according to the priority of each access network. The higher the priority of the access network, the lower the cost; or the delay of each access network may be determined according to the access point information of each access network in the underlying network information, and then according to each access network The delay determines the cost of each access network, and the smaller the delay of the access network, the lower the cost.

403. Select a target access network. Specifically, the method includes: selecting, from a plurality of access networks, the least expensive access network as the target access network; and storing the access point information of the target access network, so as to facilitate access to the target access network.

404, data transmission. The local AE and the remote CSE transmit data through the Mca interface, and the local CSE and the remote CSE transmit data through the Mcc interface.

It should be understood that when the local AE performs data transmission to the local CSE, it is not necessary to re-select the access network, and the data is directly transmitted through the Mca interface.

FIG. 5 is a schematic flowchart of selecting an access network in a oneM2M system according to another embodiment of the present invention, showing a schematic flowchart of data transmission between a local AE or CSE (AE/CSE 510 in the figure) and a remote AE 530.

501. Obtain the underlying network information. Specifically, the underlying network information of the underlying network service entity is obtained, and the underlying network service entity supports multiple access networks, and the underlying network information includes an access network identifier and each access of each of the multiple access networks. Network access point information.

502. Determine a cost function value of each access network in the underlying network. Specifically, the priority of each access network may be determined according to an access network identifier of each access network in the underlying network information, following The cost of each access network is determined according to the priority of each access network. The higher the priority of the access network, the lower the cost; or the access point of each access network in the underlying network information. The information determines the delay of each access network, and then determines the cost of each access network according to the delay of each access network. The smaller the delay of the access network, the lower the cost.

503. Select a target access network. Specifically, the least expensive access network may be selected from the multiple access networks as the target access network, and then the access point information of the target access network is saved to facilitate access to the target access network.

504, data transmission. The local AE and the remote CSE transmit data through the Mca interface, and the local CSE and the remote CSE transmit data through the Mcc interface.

505, relocation process. After the data finally arrives at the AE registered CSE, the CSE performs the PoA relocation strategy and finally sends the data to the remote end.

6 is a schematic flowchart of a process of selecting an access network in a oneM2M system according to another embodiment of the present invention, showing an embodiment in which a mobile phone user located in a user service domain uploads a video to a server of a public service domain.

612. The mobile phone user initiates a video upload request AE611 and sends the request to the local CSE 613. The data transmission of the process is implemented by using the Mca interface.

614. After obtaining the underlying network service entity NSE 615 and supporting both the WIFI network and the 3GPP network access network, the CSE 613 sends the WIFI network and the 3GPP network resource request message to the local NSE 615 through the Mcn interface, and the WIFI network resource request message includes the WIFI. The identifier of the access network, where the resource request message of the 3GPP network includes the identifier of the 3GPP access network;

616. After receiving the resource request message sent by the CSE 613, the NSE 615 returns the access point information corresponding to the WIFI and the 3GPP network to the CSE 615, where the access point information corresponding to the WIFI network includes the MAC address of the WIFI access network, and the 3GPP The corresponding access point information in the network includes the mobile station international subscriber identification number number MSISDN.

After two steps of 614 and 616, the CSE 613 obtains the underlying network information of the underlying network, that is, the access network identifier of each access network in the underlying network and the access point information of each access network are obtained. Specifically, a sub-resource of the WIFI network is created, and the sub-resource NSE _WIFI of the WIFI network further includes an access network identifier of the WIFI network, a NetworkID _WIFI attribute, and a corresponding PoA _WIFI attribute of the access point; and a sub-resource for creating a 3GPP network. NSE _3GPP , the sub-resource of the 3GPP network includes an access network identifier of the 3GPP network, a NetworkID _3GPP attribute, and an access point PoA _3GPP attribute corresponding thereto.

621. Select the least expensive access network from the two access networks of the WIFI network and the 3GPP network as the target access network, and save the access point information of the target access network, so as to access the target access network. .

Optionally, when the least cost access network is selected from the two access networks of the WIFI network and the 3GPP network as the target access network, the network ID _WIFI attribute of the access network identifier of the WIFI network and the access network identifier of the 3GPP network are selected. _{The 3GPP} attribute determines the priority of the WIFI network and the 3GPP network. For example, the priority of the WIFI network is 1, and the priority of the 3GPP network is 2. The cost of the WIFI network is stored in the FunctionValue _WIFI attribute in the form of a numerical value by equivalent change. The cost of the 3GPP network will be stored in the FunctionValue _3GPP attribute as a value change. Then comparing the specific function values in the FunctionValue _WIFI and FunctionValue _3GPP , the cost of the WIFI network will be less than the cost of the 3GPP network, thus determining the WIFI network as Target access network.

Optionally, when selecting the least expensive access network from the WIFI network and the 3GPP network as the target access network, according to the access point PoA _WIFI attribute of the _WIFI network and the access point PoA _3GPP attribute of the 3GPP network Sending test data packets to the WIFI network and the 3GPP network respectively, and receiving response messages of the WIFI network and the 3GPP network to the test data packets respectively, to determine the response time between the test data packets and the WIFI network and the 3GPP network, and thereby obtaining the WIFI. The delay of the network and the 3GPP network, the delay of the WIFI network will be stored in the FunctionValue _WIFI attribute in the form of a numerical value, and the delay of the 3GPP network will be stored in the FunctionValue _3GPP attribute in the form of a numerical value. Then, comparing the specific function values in FunctionValue _WIFI and FunctionValue _3GPP , the cost of the WIFI network is less than the cost of the 3GPP network, thereby determining that the WIFI network is the target access network.

After determining that the WIFI network is the target access network, the access network information in the PoA attribute of the access network is updated to the access point information in the PoA _WIFI attribute of the WIFI network, so as to access the WIFI network.

623. After accessing the WIFI network, the server receives the data packet from the user, unpacks the packet, and transfers the information to the CSE 624 for processing.

625. Perform a PoA relocation policy, extract the received video information, and after the authentication, hand over the video receiving application response.

The method for selecting an access network according to an embodiment of the present invention is described in detail above with reference to FIG. 1 to FIG. 6, and the selection of an access network in a oneM2M system according to an embodiment of the present invention will be described in detail below with reference to FIG. 6 to FIG. Device.

7 is a schematic block diagram of an apparatus for selecting an access network in a oneM2M system according to an embodiment of the present invention. As shown in FIG. 7, the apparatus 700 includes:

The transceiver unit 710 is configured to obtain the underlying network information of the underlying network service entity NSE, where the NSE supports multiple access networks, and multiple access networks adopt different access network technologies, where the underlying network information includes multiple access networks. The access network identifier of each access network and the access point information of each access network.

The determining unit 720 is configured to determine a cost of each of the multiple access networks according to the underlying network information.

The selecting unit 730 is configured to select, as the target access network, an access network that selects the least cost from the plurality of access networks.

The saving unit 740 is configured to update the access point information of the currently used access network saved in the access point PoA attribute to the access point information of the target access network, where the PoA attribute is located in a public service entity. CSE under the CSE basic resources.

The apparatus for selecting an access network provided by the embodiment of the present invention determines the cost of each of the plurality of access networks supported by the underlying network service entity by acquiring the underlying network information of the underlying network service entity in the oneM2M system, thereby enabling The access network with the least cost is selected from the multiple access networks as the target access network. In the above manner, the selection problem of multiple access networks in the oneM2M system can be flexibly solved. It should be understood that the apparatus for selecting an access network in the oneM2M system of the embodiment of the present invention may be the above public service entity, and the present invention is not limited thereto.

Optionally, as an embodiment of the present invention, the transceiver unit 710 is configured to obtain the underlying network information of the underlying network service entity, where the underlying network information includes an access network identifier of each of the multiple access networks. And access point information for each access network. Specifically, the transceiver unit 710 can represent the underlying network information of the underlying network service entity by creating an underlying network service entity NSE resource under the CSE basic resource, where the NSE resource includes the ith access in each access network. The sub-resource NSE _i of the network information of the network (the i-th access network may represent any one of the access networks in the underlying network). The NSE _i sub-resource includes an access network identifier (NetworkID _i ) attribute of the i-th access network, where the network ID _i attribute is used to indicate an access network identifier of the i-th access network; the sub-resource NSE _i further includes The access point PoA _i attribute of the i-th access network, the PoA _i attribute is used to indicate the access point information of the i-th access network. Specifically, the access point information of each access network refers to a physical address list required for each access network to access the CSE, so the PoA _i attribute is used to indicate the access of the i-th access network. Point information means that the physical address list of the i-th access network is recorded in the PoA _i attribute. For example, when the access network is a Bluetooth network, the physical address list records the Mac address of the Bluetooth access network. When the access network is a WIFI network, the physical address list records the WIFI access network, corresponding to The IP address of the WIFI access network. It should be understood that the sub-resource NSE _i may include other resources and/or attributes in addition to the NetworkID _i attribute and the PoA _i attribute, and the like, and the resource form of other access networks, and the present invention is not limited thereto.

Optionally, as an embodiment of the present invention, the transceiver unit 710 is specifically configured to: obtain the access network identifier of each access network; and send a resource request message of each access network to the NSE, where each connection The resource request message of the network includes an access network identifier of each access network, and the resource request message of each access network is used to request the NSE to return the access point information of each access network; and each of the returned NSEs is received. Access point information of the access network; creating NSE resources of each access network under the CSE basic resources, and identifying the access network of each access network and the access point of each access network Information is stored in the NSE resources of each access network.

Specifically, the resource request message Request _{i of} the i-th access network is sent to the NSE, where the resource request message Request _i includes the access network identifier NetworkID _{i of} the i-th access network, and the resource request message Request _{i is} used for The NSE is requested to return the access point information corresponding to the i-th access network. In the above manner, the resource request message of each access network in the NSE is sent in the form of traversal, and the access point information of each access network is obtained, and the foregoing NSE resources are established, that is, the foregoing network is obtained. The underlying network information in the service entity.

Optionally, as an embodiment of the present invention, the determining unit 720 is specifically configured to: determine, according to the underlying network information, a cost of each of the multiple access networks, including: according to each of the underlying network information The access network identifier of the access network determines the priority of each access network; the cost of each access network is determined according to the priority of each access network, and the higher the priority of each access network, the higher the corresponding cost Small; create an access point policy PoAPolicy resource of each access network under the CSE basic resource, and save the access network identifier of each access network and the cost of each access network in the PoAPolicy of each access network. In the resource.

Specifically, the determining unit 720 can create an access point policy (PoAPolicy) resource under the CSE basic resource to represent the cost of each access network of the underlying network, so as to select the minimum cost according to the access point cost of each access network. The access network serves as the target access network. The PoAPolicy resource includes a sub-resource indicating an i-th access network policy (PoAPolicy _i ) in each access network, and the PoAPolicy _i resource further includes an access network identifier NetworkID _i attribute for indicating the i-th access network. And a cost function value (FunctionValue _i ) attribute of the i-th access network, where the FunctionValue _i attribute is used to indicate a cost size of the i-th access network in the underlying network,

It should be understood that the sub-resource PoAPolicy _i created by the determining unit 720 may include other resources and/or attributes in addition to the NetworkID _i attribute and the FunctionValue _i attribute, and the like, and the resource form of each access network, the present invention does not Limited to this.

Specifically, on the basis of the foregoing resource structure, the determining unit 720 can determine the priority of the i-th access network according to the access network identifier in the NetworkID _i attribute, and obtain the i-th through the priority of the i-th access network. The cost of the access network, the cost of the i-th access network can be stored in the FunctionValue _i attribute of the PoAPolicy _i resource by the equivalent conversion in the form of a specific value, thereby obtaining the PoAPolicy of the i-th access network. _i resources, it should be understood that when the priority of the access network is higher, the cost of the access network is smaller; conversely, the lower the priority of the access network, the greater the cost of the corresponding access network. According to the foregoing manner, each access network in the NSE is processed in a traversal manner, and the access point policy resource of each access network in the CSE basic resource is obtained, that is, the PoAPolicy resource in the CSE basic resource structure is obtained. By comparing the cost function value of each access network in the PoAPolicy resource, the access network with the lowest cost can be selected as the target access network.

It should be understood that the determining unit 720 determines the cost of each access network according to the priority of each access network, including, for example, but not limited to: a priority parameter may be obtained according to the default setting of each access network. The cost of each access network may be determined according to the characteristic information of each access network, and then the cost of each access network is obtained according to the priority of each access network. The invention is not limited to this.

Optionally, as an embodiment of the present invention, the determining unit 720 is further configured to: add an active access point policy (activePoAPolicy) resource to the CSE basic resource to indicate an access point policy of the currently used access network, where the activePoAPolicy indicates an application. Which policy (for example, according to the delay parameter or priority parameter of the access network) determines the cost of the access network, and the activePoAPolicy resource is associated with the above PoAPolicy resource.

Optionally, as an embodiment of the present invention, the selecting unit 730 is specifically configured to: determine, according to access point information of each access network in the underlying network information, a delay of each access network; according to each access network The delay determines the cost of each access network, and the smaller the delay of each access network, the lower the cost; the PoAPolicy resources of each access network are created under the CSE basic resources, and each access network is created. The access network identity and the cost of each access network are stored in the PoAPolicy resources of each access network. Specifically, the selecting unit 730 determines, according to the NSE _i resource or the PoAPolicy _i resource, the access network identifier NetworkID _i attribute indicating the i-th access network, and the access point information indicating the i-th access network in the NSE _i resource. The PoA _i attribute can obtain the delay of the i-th access network, determine the cost of the i-th access network by using the delay of the i-th access network, and perform an equivalent change of the cost to a numerical value. The form is saved in the FunctionValue _i attribute under the PoAPolicy _i resource. According to the above manner, each access network in the underlying network is processed in a traversal manner, and the delay of each access network in the NSE can be obtained, and each access network is obtained according to the delay of each access network. The cost, and the equivalent substitution is stored in the value function value resource of each access network, so that the PoAPolicy resource under the CSE basic resource can be obtained by comparing each access network in the PoAPolicy resource. The cost of choosing the least expensive access network as the target access network.

Optionally, as an embodiment of the present invention, the selecting unit 730 is specifically configured to: separately send a test data packet to each access network; and receive a response message of each test network to the test data packet. Determining a response time between the test data packet and each of the access networks; determining a delay of each access network according to a response time of the test data packet and each access network .

Specifically, the selecting unit 730 is specifically configured to: send a test data packet to the i th access network according to the access point information of the i th access network; and receive a response message of the i th access network to the test data packet. Determining a response time between the test data packet and the i-th access network, where the response time is from the issuance of the test data packet to the receipt of the response message of the i-th access network to the test data packet. Time, according to the response time of the i-th access network to the test data packet, the delay of the i-th access may be determined. According to the above manner, each access network in the underlying network is processed in a traversal manner, and the delay of each access network in the NSE can be obtained, and each access network is obtained according to the delay of each access network. The cost and the equivalent cost are stored in the value function value resource of each access network, so that the PoAPolicy resource under the CSE basic resource can be obtained by comparing each access network of the PoAPolicy resource. At the cost, the access network with the lowest cost is selected as the target access network.

In the saving unit 740, the process of specifically storing the access point information of the target access network is as follows. For example, the access point PoA attribute stores the access point information of the mth access network currently accessing the CSE. The access point information of the m access networks is recorded in the PoA _m attribute, and the selection unit 730 selects the nth access network with the lowest cost after comparing the costs of all the multiple access networks supported by the underlying network service entity. As the target access network, the saving unit 740 saves the access point information of the nth access network in the access point information PoA _n attribute, and updates the information in the PoA attribute of the access point to the PoA _n resource. The access point information is used to access the nth access network as the target access network.

Optionally, as an embodiment of the present invention, the selecting unit 730 is further configured to: when N is 1, that is, only one access network exists in the underlying network (for example, the i-th access network), and only the first NSE resource exists. When the sub-resources NSE i of the access network are _i , the saving unit 740 updates the access point information saved in the PoA _i attribute of the unique sub-resource NSE _i to the access point PoA attribute to select the unique one. The access network acts as a target access network.

FIG. 8 is a schematic block diagram of an apparatus for selecting an access network in a oneM2M system according to another embodiment of the present invention. As shown in FIG. 800, the apparatus 800 includes a processor 810, a memory 820, a bus system 830, a receiver 840, and a transmitter 850. The processor 810, the memory 820, the receiver 840, and the transmitter 850 are connected by a bus 830 for storing instructions for executing instructions stored in the memory 820 and controlling the receiver 840 to receive information. . The transmitter 850 and the receiver 840 can be used to obtain the underlying network information of the underlying network, where the underlying network information includes the access network identifier and access point information of each access network; the processor 810 is configured to use the bottom layer according to the bottom layer. Network information, determining a cost function value of each access network in the underlying network; the processor 810 is further configured to select an access network from the bottom network as the target access network according to the cost function value of each access network The memory 820 is configured to create an NSE resource of each access network under the CSE basic resource, and save the access network identifier of each access network and the access point information of each access network in each access network. In the NSE resources.

The apparatus for selecting an access network provided by the embodiment of the present invention determines the cost of each of the plurality of access networks supported by the underlying network service entity by acquiring the underlying network information of the underlying network service entity in the oneM2M system, thereby enabling The access network with the least cost is selected from the multiple access networks as the target access network. In the above manner, the selection problem of multiple access networks in the oneM2M system can be flexibly solved. It should be understood that, in the embodiment of the present invention, the processor 810 may be a central processing unit ("CPU"), and the processor 810 may also be other general-purpose processors, digital signal processors (DSPs). , an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

The memory 820 can include read only memory and random access memory and provides instructions and data to the processor 810. A portion of the memory 820 may also include a non-volatile random access memory.

The bus system 830 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for the sake of clarity, the various buses are labeled as buses in the figure. System 830.

In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 810 or an instruction in a form of software. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 820, and the processor 810 reads the information in the memory 820 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

Optionally, as an embodiment, the transmitter 850 is further configured to acquire the access network identifier of each access network and send a resource request message of each access network to the NSE, where each access network The resource request message includes an access network identifier of each access network, and the resource request message of each access network is used to request the NSE to return the access point information of each access network; the receiver 840 is further configured to receive the NSE. Returning access point information of each access network; the processor 810 is configured to create an NSE resource of each access network under the CSE basic resource, and identify and access each access network identifier of each access network The access point information of the network access is stored in the NSE resources of each access network. Optionally, as an embodiment, the processor 810 is further configured to: determine, according to an access network identifier of each access network in the underlying network information, a priority of each access network; according to each access network The priority determines the cost of each access network, and the higher the priority of each access network, the lower the cost; the access point policy PoAPolicy resources of each access network are created under the CSE basic resources, and each The access network identity of the access network and the cost of each access network are stored in the PoAPolicy resources of each access network.

Optionally, as an embodiment, the processor 810 is further configured to: determine, according to access point information of each access network in the underlying network information, a delay of each access network; according to each access network The delay determines the cost of each access network, and the smaller the delay of each access network, the lower the cost; the PoAPolicy resources of each access network are created under the CSE basic resources, and each access network is The access network identity and the cost of each access network are stored in the PoAPolicy resources of each access network.

Optionally, as an embodiment, the transmitter 810 is further configured to separately send a test data packet to each access network; the receiver 840 is further configured to receive a response message of each access network to the test data packet, to Determining the response time between the test data packet and each access network; the processor 810 is configured to determine the delay of each access network according to the test data packet and the response time of each access network.

Optionally, as an embodiment, the memory 820 is further configured to: create a current access point policy activePoAPolicy resource, where the activePoAPolicy resource is used to refer to The cost of each access network is determined according to the delay or priority of each access network.

It should be understood that the apparatus 700 according to an embodiment of the present invention may correspond to an execution body of a method of selecting an underlying network of an embodiment of the present invention, and may correspond to the apparatus 700 according to an embodiment of the present invention, and each module in the apparatus 700 The above and other operations and/or functions are respectively implemented in order to implement the respective methods in FIG. 2 and the corresponding processes in the respective methods in FIG. 4 to FIG. 5, and are not described herein again for brevity.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present invention is essentially or a part contributing to the prior art or a part of the technical solution. The points may be embodied in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform various embodiments of the present invention All or part of the steps of the method. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

A method for selecting an access network in a unified machine-to-machine oneM2M system, the oneM2M system comprising an application entity AE, a public service entity CSE and an underlying network service entity NSE, wherein the NSE supports multiple access networks, The multiple access networks adopt different access network technologies, and the method includes:

Acquiring the underlying network information of the NSE, where the underlying network information includes an access network identifier of each of the multiple access networks and access point information of each access network;

Determining, according to the underlying network information, a cost of each of the plurality of access networks;

Selecting, from the plurality of access networks, the least expensive access network as the target access network;

The access point information of the current access network saved in the access point PoA attribute is updated to the access point information of the target access network, where the PoA attribute is located under the CSE basic resource of the CSE.
The method according to claim 1, wherein the obtaining the underlying network information of the NSE comprises:

Obtaining an access network identifier of each access network;

Sending, to the NSE, the resource request message of each access network, where the resource request message of each access network includes an access network identifier of each access network, and each access The resource request message of the network is used to request the NSE to return the access point information of each access network;

Receiving access point information of each access network returned by the NSE;

Creating an NSE resource of each access network under the CSE basic resource, where the NSE resource of each access network is used to save an access network identifier of each access network and each of the access networks Access point information for access to the network.
The method according to claim 1 or 2, wherein the determining, according to the underlying network information, a cost of each of the plurality of access networks comprises:

Determining a priority of each access network according to an access network identifier of each access network in the underlying network information;

Determining, according to a priority of each access network, a cost of each access network, where a higher priority of each access network corresponds to a lower cost;

Creating an access point policy PoAPolicy resource of each access network under the CSE basic resource, where the PoAPolicy resource of each access network is used to save an access network label of each access network Know the cost of each of the access networks.
The method according to claim 1 or 2, wherein the determining, according to the underlying network information, a cost of each of the plurality of access networks comprises:

Determining, according to the access point information of each access network in the underlying network information, a delay of each access network;

Determining, according to a delay of each access network, a cost of each access network, where a smaller delay of each access network corresponds to a lower cost;

Creating a PoAPolicy resource of each access network under the CSE basic resource, where the PoAPolicy resource of each access network is used to save an access network identifier of each access network and each of the access networks The cost of accessing the network.
The method according to claim 4, wherein the determining the delay of each access network comprises:

Sending test data packets to each of the access networks;

Receiving, by each of the access networks, a response message to the test data packet to determine a response time between the test data packet and each of the access network groups;

Determining the delay of each access network according to the test data packet and the response time of each access network.
The method according to any one of claims 1 to 5, wherein the method further comprises:

The current access point policy activePoAPolicy resource is created under the CSE basic resource, and the activePoAPolicy resource is used to indicate that the cost of each access network is determined according to the delay or priority of each access network.
A device for selecting an access network in a unified machine-to-machine oneM2M system, comprising:

a transceiver unit, configured to acquire underlying network information of an underlying network service entity NSE, where the NSE supports multiple access networks, where the multiple access networks adopt different access network technologies, where the underlying network information includes An access network identifier of each of the plurality of access networks and access point information of each access network;

a determining unit, configured to determine, according to the underlying network information, a cost of each of the multiple access networks;

a selecting unit, configured to select, from the plurality of access networks, a least expensive access network as a target connection Access to the network;

a saving unit, configured to update access point information of the currently used access network saved in the PoA attribute of the access point to access point information of the target access network, where the PoA attribute is located in the public service entity CSE Under the CSE basic resources.
The device according to claim 7, wherein the transceiver unit is specifically configured to:

Obtaining the access network identifier of each access network;

Sending, to the NSE, the resource request message of each access network, where the resource request message of each access network includes an access network identifier of each access network, and each access The resource request message of the network is used to request the NSE to return the access point information of each access network;

Receiving access point information of each access network returned by the NSE;

Creating an NSE resource of each access network under the CSE basic resource, where the NSE resource of each access network is used to save an access network identifier of each access network and each of the access networks Access point information for access to the network.
The device according to claim 7 or 8, wherein the determining unit is specifically configured to:

Determining a priority of each access network according to an access network identifier of each access network in the underlying network information;

Determining, according to a priority of each access network, a cost of each access network, where a higher priority of each access network corresponds to a lower cost;

Creating an access point policy PoAPolicy resource of each access network under the CSE basic resource, where the PoAPolicy resource of each access network is used to save an access network identifier and a location of each access network The cost of each access network.
The device according to any one of claims 7 to 8, wherein the determining unit is specifically configured to:

Determining, according to the access point information of each access network in the underlying network information, a delay of each access network;

Determining, according to a delay of each access network, a cost of each access network, where a smaller delay of each access network corresponds to a lower cost;

Creating a PoAPolicy resource of each access network under the CSE basic resource, where the PoAPolicy resource of each access network is used to save an access network identifier of each access network and each of the access networks The cost of accessing the network.
The apparatus according to claim 10, wherein the transceiver unit is specifically configured to separately send a test data packet to each of the access networks; and the transceiver unit is further configured to receive the access network. a response message to the test data packet to determine a response time between the test data packet and each of the access networks; the determining unit is further configured to connect to each of the test data packets according to the The response time of the incoming network determines the delay of each access network.
The device according to any one of claims 7 to 11, wherein the saving unit is specifically configured to:

The current access point policy activePoAPolicy resource is created under the CSE basic resource, and the activePoAPolicy resource is used to indicate that the cost of each access network is determined according to the delay or priority of each access network.