WO2014135019A1

WO2014135019A1 - Active switchover method and device for m2m terminal in m2m network

Info

Publication number: WO2014135019A1
Application number: PCT/CN2014/072551
Authority: WO
Inventors: 孙爱芳
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-10-18
Filing date: 2014-02-26
Publication date: 2014-09-12
Also published as: CN104581757B; CN104581757A

Abstract

The present invention discloses an active switchover method and device for an M2M terminal in an M2M network, and relates to the technical field of wireless communication. The method comprises the following steps: obtaining separately the location of an M2M terminal and the signal strength of the current access point for the M2M terminal; determining whether the M2M terminal needs to switch network using the obtained M2M terminal location and the signal strength of the current access point for the M2M terminal; when it is determined that the M2M terminal needs to switch network, temporarily storing the service data stream of the M2M applications into a buffer storage device, and triggering the M2M terminal to switch access network and notifying the M2M terminal the new access point; after the M2M terminal has accessed the new access point, reading out the service data stream from the buffer storage device via the new access point; M2M refers to machine-to-machine. The present invention enhances switchover efficiency and ensures service continuity during a switchover process.

Description

The present invention relates to the field of wireless communication technologies, and in particular, to an active switching method and apparatus for an M2M terminal in an M2M network. Background technique

The M2M service platform facilitates the development, access, distribution, and subscription of services by building a management and service platform between terminals and applications. The architecture of the M2M service platform involves three parts: the terminal side, the M2M service platform, and the application side. The terminal side further includes a sensing node, a terminal, and a gateway. The application side is a variety of network services, including personal applications, enterprise applications and public infrastructure services. As a core part of the M2M service platform, its functions include providing a unified access interface for the terminal side and the application side, providing bearer links for service execution, and uniformly managing terminals, applications, and link resources, and ensuring security of service execution. . Existing M2M service platform network switching and terminal mobility management. Mostly, switching schemes between different networks are implemented according to the requirements of heterogeneity. The basic premise is that the terminal and the access device must be heterogeneous, or at least have a heterogeneous access mode. On this basis, the terminal management and access switching can be realized. Moreover, the existing handover is initiated by the terminal side, and the terminal side monitors whether each channel satisfies the service requirement, and does not distinguish whether the service is poor due to signal weakening or congestion. However, some strong access points do not necessarily have superior transmission performance, and still cannot meet the requirements after handover, and further implementation of the handover process is required. On the one hand, the existing solution increases the burden on the terminal, and the repeated disconnection and access on the other side of the terminal side also adds pressure to the M2M platform. Therefore, in order to solve the above problems, the present invention provides an active switching method and apparatus for an M2M terminal in an M2M network. SUMMARY OF THE INVENTION An object of the embodiments of the present invention is to provide an active switching method and device for an M2M terminal in an M2M network, which solves the problem that the switching is unreasonable due to factors that only consider the signal strength when the terminal performs the handover decision, and repeatedly disconnects. Access and other issues. According to an aspect of the present invention, a method for actively switching an M2M terminal in an M2M network includes the following steps: respectively acquiring a location of an M2M terminal and a signal strength of a current access point of the M2M terminal; Determining whether the M2M terminal performs network handover by using the acquired M2M terminal location and the signal strength of the current access point of the M2M terminal; and determining the service data flow of the M2M application when determining that the M2M terminal performs network handover Temporarily stored in the buffer storage module, and triggering the M2M terminal to perform handover of the access network and notifying the new access point to the M2M terminal; after the M2M terminal accesses the new access point, The new access point reads the service data stream in the buffer storage module; wherein the M2M refers to the machine to the machine. Preferably, the method further includes: when determining that the M2M terminal does not perform network switching, the M2M terminal directly reads the service data flow of the M2M application. Preferably, the determining whether the M2M terminal performs network switching by using the acquired M2M terminal location and the signal strength of the current access point of the M2M terminal comprises: acquiring the acquired M2M terminal by using a terminal side interface The location and the signal strength of the current access point of the M2M terminal are sent to the positioning monitoring module; when the positioning monitoring module receives the signal strength of the M2M terminal location and the current access point of the M2M terminal, the decision control module is adopted. Determining whether the M2M terminal performs network switching. Preferably, when the location monitoring module receives the signal strength of the M2M terminal location and the current access point of the M2M terminal, determining, by the decision control module, whether the M2M terminal performs network switching includes: the decision control module Determining whether the M2M terminal location and the signal strength of the current access point of the M2M terminal meet the current service requirement; when the M2M terminal location and the signal strength of the current access point of the M2M terminal meet the current service requirement, Then, after a period of time, the M2M terminal determines that the M2M terminal and the M2M terminal's current access point do not meet the current service requirement, and then determines that the M2M terminal performs network switching. Preferably, when it is determined that the M2M terminal performs network switching, the service data flow of the M2M application is temporarily stored in the buffer storage module, and the M2M terminal is triggered to perform handover of the access network and notify the new access point. The M2M terminal includes: when it is determined that the M2M terminal performs network switching, the decision control module sends a switching signal to the application side interface and the terminal side interface respectively; when the application side interface receives the switching signal, The service data stream of the M2M application is temporarily stored in the buffer storage module, and the buffer storage address is sent to the decision control module; when the terminal side interface receives the handover signal, the M2M terminal is triggered to access the network. Switching, and sending a configuration file to the M2M terminal; wherein the configuration file includes new access point information and configured operation script information. Preferably, after the M2M terminal accesses the new access point, reading, by the new access point, the service data flow in the buffer storage module includes: accessing the new connection in the M2M terminal After the entry point, the buffer storage address is obtained from the decision control module; and the service data stream in the buffer storage module is read by the new access point and the obtained buffer storage address. According to another aspect of the present invention, an M2M terminal active switching device in an M2M network is provided, including: an acquiring module, configured to separately acquire a location of an M2M terminal and a signal strength of a current access point of the M2M terminal; The determining module is configured to determine whether the M2M terminal performs network switching by using the obtained M2M terminal location and the signal strength of the current access point of the M2M terminal, and the buffering and switching module is configured to determine that the M2M terminal performs network During the handover, the service data stream of the M2M application is temporarily stored in the buffer storage module, and the M2M terminal is triggered to perform the switching of the access network and notify the new access point to the M2M terminal; the reading module is set to After the M2M terminal accesses the new access point, the service data stream in the buffer storage module is read by the new access point; Wherein, the M2M refers to a machine to a machine. Preferably, the determining module includes: a sending unit, configured to send, by using the terminal side interface, the acquired M2M terminal location and the signal strength of the current access point of the M2M terminal to the positioning monitoring module; And when the location monitoring module receives the signal strength of the M2M terminal location and the current access point of the M2M terminal, determining, by the decision control module, whether the M2M terminal performs network switching. Preferably, the buffering and switching module includes: a sending switching signal unit, configured to: when determining that the M2M terminal performs network switching, the decision control module sends a switching signal to an application side interface and a terminal side interface respectively; And setting, when the application side interface receives the switching signal, temporarily storing the service data stream of the M2M application into the buffer storage module, and sending the buffer storage address to the decision control module; the network switching unit When the terminal side interface receives the switching signal, the M2M terminal is triggered to perform the switching of the access network, and the configuration file is sent to the M2M terminal. The configuration file includes the new access. Point information and configured action script information. Preferably, the reading module includes: an obtaining unit, configured to acquire a buffer storage address from the decision control module after the M2M terminal accesses the new access point; and the reading unit is configured to pass through the The new access point and the obtained buffer storage address are read, and the service data stream in the buffer storage module is read. Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows: The embodiment of the present invention determines whether the M2M terminal performs network switching by obtaining the location of the M2M terminal and the signal strength of the current access point, and The access point is optimized according to the signal strength and QoS parameters of the current access point, and the M2M service data flow is buffered during the handover process, which not only ensures the continuity of the service, but also ensures the efficiency of the M2M service execution. . BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart of a method for actively switching an M2M terminal in an M2M network according to an embodiment of the present invention; FIG. 2 is a schematic diagram of an active switching device for an M2M terminal in an M2M network according to an embodiment of the present invention; 3 is a flowchart of a method for actively switching an M2M terminal in an M2M network according to an embodiment of the present invention; FIG. 4 is a structural diagram of an active switching device for an M2M terminal in an M2M network according to an embodiment of the present invention; The embodiment of the present invention provides a schematic diagram of performing network switching by using the method of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S) The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. The embodiment of the invention realizes the real-time monitoring of the M2M terminal position, the signal strength and the QoS parameter information by adding the positioning monitoring module, and prepares sufficient information for the network switching. At the same time, by adding the decision control module and the buffer storage module, the active switching of the network is realized, and the uncompleted service flow in the switching process is saved in the buffer storage module of the M2M platform, and the access to the new access point is ensured. The continuity of M2M service transmission. Therefore, it is possible to avoid the problem that the QoS cannot meet the service transmission requirement due to the movement of the M2M terminal, and the continuity of the service can be ensured during the network handover process. FIG. 1 is a flowchart of a method for actively switching an M2M terminal in an M2M network according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps: Step S101: Acquire a location of an M2M terminal and a current access of an M2M terminal respectively. Signal strength of the point; Step S102: Determine whether the M2M terminal performs network switching by using the acquired M2M terminal location and the signal strength of the current access point of the M2M terminal; Step S103: When determining that the M2M terminal performs network switching, the M2M is The application service data stream is temporarily stored in the buffer storage module, and triggers the M2M terminal to perform the switching of the access network and notify the new access point to the M2M terminal; Step S104: After the M2M terminal accesses the new access point, the service data stream in the buffer storage module is read by the new access point; wherein the M2M refers to a machine to a machine. The embodiment of the present invention further includes: when determining that the M2M terminal does not perform network switching, the M2M terminal directly reads the service data flow of the M2M application. The determining whether the M2M terminal performs network switching by using the obtained M2M terminal location and the signal strength of the current access point of the M2M terminal includes: acquiring the acquired M2M terminal location and the current access point of the M2M terminal by using the terminal side interface The signal strength is sent to the positioning monitoring module. When the positioning monitoring module receives the signal strength of the M2M terminal location and the current access point of the M2M terminal, the decision control module determines whether the M2M terminal performs network switching. Specifically, when the location monitoring module receives the signal strength of the M2M terminal location and the current access point of the M2M terminal, determining, by the decision control module, whether the M2M terminal performs network switching includes: the decision control module determines that Whether the M2M terminal location and the signal strength of the current access point of the M2M terminal meet the current service requirement; when the M2M terminal location and the signal strength of the current access point of the M2M terminal meet the current service demand, then after a period of time, The M2M terminal determines that the M2M terminal performs network switching when the M2M terminal location and the signal strength of the current access point of the M2M terminal do not meet the current service requirement. When it is determined that the M2M terminal performs network switching, temporarily storing the service data flow of the M2M application into the buffer storage module, and triggering the M2M terminal to perform the switching of the access network and notifying the new access point to the M2M terminal includes: When it is determined that the M2M terminal performs network switching, the decision control module sends a switching signal to the application side interface and the terminal side interface respectively; when the application side interface receives the switching signal, the service data flow of the M2M application is used. Temporarily stored in the buffer storage module, and the buffer storage address is sent to the decision control module; when the terminal side interface receives the switching signal, triggering the M2M terminal to perform switching of the access network, and sending the configuration file Go to the M2M terminal; wherein, the configuration file includes new access point information and configured operation script information. After the M2M terminal accesses the new access point, reading the service data flow in the buffer storage module by using the new access point includes: after the M2M terminal accesses the new access point, Obtaining a buffer storage address in the decision control module; reading, by the new access point and the obtained buffer storage address, a service data flow in the buffer storage module. FIG. 2 is a schematic diagram of an M2M terminal active switching device in an M2M network according to an embodiment of the present invention. As shown in FIG. 2, the method includes: an obtaining module 201, configured to separately acquire a location of an M2M terminal and an M2M. The signal strength of the current access point of the terminal; the determining module 202 is configured to determine whether the M2M terminal performs network switching by using the acquired M2M terminal location and the signal strength of the current access point of the M2M terminal; and the buffering and switching module 203 is set to be When the M2M terminal performs network switching, the service data stream of the M2M application is temporarily stored in the buffer storage module, and the M2M terminal is triggered to perform the switching of the access network and notify the new access point to the M2M terminal; the reading module 204 After the M2M terminal accesses the new access point, the service data stream in the buffer storage module is read by the new access point; wherein the M2M refers to a machine to a machine. The determining module 202 of the embodiment of the present invention includes: a sending unit, configured to send, by using the terminal side interface, the acquired M2M terminal location and the signal strength of the current access point of the M2M terminal to the positioning monitoring module; the determining unit is set to be When the location monitoring module receives the signal strength of the M2M terminal location and the current access point of the M2M terminal, the decision control module determines whether the M2M terminal performs network switching. The buffering and switching module 203 of the embodiment of the present invention includes: a sending switching signal unit, configured to: when determining that the M2M terminal performs network switching, the decision control module sends a switching signal to an application side interface and a terminal side interface respectively; a storage unit, configured to temporarily store the service data stream of the M2M application into the buffer storage module when the application side interface receives the switching signal, and send the buffer storage address to the decision control module; the network switching unit And setting, when the terminal side interface receives the switching signal, triggering the M2M terminal to perform the switching of the access network, and sending the configuration file to the M2M terminal; where the configuration file includes the new access point information. And configured action script information. The reading module 204 of the embodiment of the present invention includes: an acquiring unit, configured to: after the M2M terminal accesses the new access point, obtain a buffer storage address from the decision control module; The new access point and the obtained buffer storage address are read, and the service data stream in the buffer storage module is read. FIG. 3 is a flowchart of a method for actively switching an M2M terminal in an M2M network according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps: Step S301: Locating an M2M terminal location and monitoring a signal strength;

The M2M service platform locates the location of the M2M terminal through a system such as GPS, and monitors the signal strength of the M2M terminal at the current access point by searching for the transmission of the frame and the reception of the response frame. In this step, the QoS parameters related to the terminal side interface can also be obtained as a basis for subsequent decision. Step S302, determining whether the M2M terminal performs network switching. Using the location information of the M2M terminal, the signal strength information of the current access point, and other related QoS parameter information, determining whether the current service requirement is met, and if it is satisfied, then Make a new judgment; If it is not satisfied, it is determined that the M2M terminal performs network switching, and sends a handover signal to the terminal side interface and the application side interface respectively, and selects an access point that is closest to the M2M terminal and whose QoS can meet the requirements from all the access points. A configuration file formed for re-access is sent to the terminal side interface. Step S303, the M2M service data stream is temporarily stored in the buffer storage area. After receiving the switching signal described in step S302, the application side interface transmits the current M2M service data stream to the buffer storage area, and the buffer storage area is allocated correspondingly. The memory, and the stored address is sent to the decision control module, so that the new access point can establish a connection and start reading the buffer from the address. Step S304, triggering the M2M terminal to re-access the new access point; after receiving the switching signal described in step S302, the terminal-side interface triggers the M2M terminal to perform reconfiguration, and sends the configuration file in step S302 to the M2M terminal. The configuration file includes information of a new access point and an operation script for automatic configuration. Step S305, reading the buffer data and releasing the buffer storage area. After the M2M terminal accesses the new access point, the terminal-side interface becomes a new access point, and the address of the service data stream buffer of the handover process is read from the decision and control module, and data is read from the address and sent to the M2M terminal. Since the M2M terminal and the terminal side interface are generally short-range high-speed links, the transmission efficiency is high, and the service transmission that is not completed in the handover process can be obtained in a short time. After the data is read, the buffer memory is re-released. For use in other switching processes thereafter. FIG. 4 is a structural diagram of an M2M terminal active switching device in an M2M network according to an embodiment of the present invention. As shown in FIG. 4, the M2M service platform 40 is configured to implement active switching to the M2M terminal 42 network. The network active switching device is located between the M2M application 41 and the M2M terminal 42. The M2M service platform 40 includes an application side interface 401, a decision control module 402, a location monitoring module 403, a buffer storage module 404, and a terminal side interface 405. The application side interface 401 is configured to respond to the registration request of the M2M application 41, and is responsible for communication between the M2M service platform 40 and the M2M application 41, and receives the service data flow from the M2M application 41. The interface is managed by the decision control module 402. In the normal case, the service data stream is directly sent to the terminal side interface 405. If the switching signal of the decision control module 402 is received, the M2M terminal 42 performs the access point switching. The service data stream is temporarily stored in the buffer storage module 404. The terminal side interface 405 is configured to send the location information of the M2M terminal 42 and the signal strength information of the service transmission process and the QoS related parameter information to the location monitoring module 403 in response to the access request of the M2M terminal 42. The The interface is managed by the decision control module 402. In the normal case, the service data stream from the application side interface 401 is received. If the switching signal of the decision control module 402 is received, the M2M terminal 42 is triggered to perform the switching of the access point, and the new The information of the access point and the configuration file are sent to the M2M terminal; if the M2M terminal 42 is a new access point, after the M2M terminal 42 is accessed, the buffered service data stream is first read from the buffer storage module 404 and sent to the M2M terminal 42. The location monitoring module 403 is configured to receive the location information of the M2M terminal 42 from the terminal side interface 405, the signal strength information during the service transmission process, or other QoS parameter information, and store it in the module for the decision control module 402 to invoke. The decision control module 402 is configured to determine whether the M2M terminal 42 performs network switching, and controls other interfaces and modules of the network active switching device in the M2M service platform 40. When the bearer cannot meet the requirements of the service transmission, the location, signal strength, and QoS information about the M2M terminal 42 in the location monitoring module 403 are invoked to determine whether the service transmission capability is reduced due to the movement of the M2M terminal 42. If yes, it searches for a new access point that meets the requirements of the signal strength and the QoS, and notifies the application-side interface 401 to forward the M2M service data stream to the buffer storage module 404, and sends the configuration file to the terminal-side interface 405. The M2M terminal 42 triggers the M2M terminal 42 to perform an access point switch. The buffer storage module 404 is configured to store the M2M service flow data in the handover process, and after receiving the control signal from the decision control module 402, allocate a storage space for the M2M service data flow from the application side interface 401. After the M2M terminal 42 switches to the new access point, the new terminal side interface 405 will read the data from the module, and the module will free up the buffer space for later switching. FIG. 5 is a schematic diagram of a network switching performed by using the method of the present invention. As shown in FIG. 5, the smart phone 501, the M2M service platform 502, and the M2M application server 503 are included. The M2M service platform 502 includes a wireless access point (AN1) 5021, a wireless access point (AN2) 5022, an application access router 5023, a location monitoring server 5024, a decision control server 5025, and a buffer storage server 5026. When the signal between the smart phone 501 and the wireless access point (AN1) 5021 is good and the service transmission can meet the QoS requirements of the M2M service, the data of the application access router 5023 directly reaches the wireless access point through the decision control server 5025 (AN1). ) 5021. When the service transmission network cannot meet the QoS requirements of the M2M service, and the reason is that the movement of the smartphone 501 causes the wireless access point (AN1) 5021 signal to become weak. At this time, active network switching is required, and the decision control server 5025 calls information about the location, signal strength, QoS parameters and the like of the smart phone 501 in the location monitoring server 5024, and determines the closest to the smart phone 501 and can satisfy the QoS parameters after the decision. The required access point acts as a new access point and sends a handover signal to the application access router 5023 and the wireless access point (AN1) With AN2) 5021 and 5022. After receiving the handover signal of the decision control server 5025, the application access router 5023 temporarily stores the traffic flow to the buffer storage server 5026. After receiving the switching signal of the decision control server 5025, the wireless access point (AN1) 5021 triggers the smart phone 501 to perform the switching of the access network, and sends the configuration file to the smart phone 501. The smartphone accesses the new wireless access point (AN2) 5022 by reconfiguration and reads the data on the buffer storage server 5026 through the new wireless access point (AN2) 5022. The data from the M2M application server 503 during the handover process is regained, and the continuity of the service is ensured. In summary, in the embodiment of the present invention, by monitoring the positioning and signal strength of the M2M terminal, comprehensively considering whether the terminal signal strength, the existing network resource, and the QoS parameter detected by the M2M service platform determine whether to perform handover, the terminal is mitigated. The burden of decision-making avoids the need to consider the signal strength and ignores the repeated disconnection and access caused by the limitation of network resources, and ensures that the service execution requirements can be met within a certain period of time after accessing the new access point. By adding a buffering and storage server to the M2M service platform, the M2M service provides buffer storage of the M2M service flow during the network switching between different access points, and maintains the service transmission between the M2M service platform and the M2M application server. After the M2M terminal accesses the new access point, the data of the buffer can be quickly read, the switching efficiency is improved, and the service continuity in the handover process is ensured. Since the M2M service platform is used as a transition in this process, the M2M terminal actively performs network switching without using multiple backup channels. Due to the multi-bit short-range communication between the M2M terminal and the M2M service platform, the communication rate is relatively fast. In summary, the embodiments of the present invention have the following technical effects: The embodiments of the present invention fully utilize the advantages of the M2M platform in information monitoring and parameter collection. When judging whether the M2M terminal performs network handover, not only the signal problem between the M2M terminal and the access point is considered, but also the channel parameters of the M2M core network are considered, and whether handover is performed and how to perform handover is considered. At the same time, the service transmission between the M2M service platform and the M2M application server is maintained during the handover process. After the M2M terminal accesses the new access point, the service data stream of the buffer can be quickly read, and the switching efficiency is improved. And ensure the business continuity in the handover process. Although the invention has been described in detail above, the invention is not limited thereto, and various modifications may be made by those skilled in the art in accordance with the principles of the invention. Therefore, modifications made in accordance with the principles of the invention should be construed as falling within the scope of the invention. Industrial Applicability The technical solution provided by the embodiments of the present invention can be applied to the field of wireless communication technologies. By obtaining the location of the M2M terminal and the signal strength of the current access point, it is determined whether the M2M terminal performs network switching, and is connected from all in the determining process. The in-point is optimized according to the signal strength and QoS parameters of the current access point, and is implemented. The buffering of the M2M service data flow during the handover process not only ensures the continuity of the service, but also ensures the efficiency of the execution of the M2M service.

Claims

The claim request, an active switching method of an M2M terminal in an M2M network, includes the following steps:

Determining, respectively, a location of the M2M terminal and a signal strength of the current access point of the M2M terminal; determining whether the M2M terminal performs network switching by using the obtained M2M terminal location and a signal strength of the current access point of the M2M terminal ;

When it is determined that the M2M terminal performs network switching, the service data flow of the M2M application is temporarily stored in the buffer storage module, and the M2M terminal is triggered to perform the switching of the access network, and the new access point is notified to the M2M terminal. ;

After the M2M terminal accesses the new access point, the service data stream in the buffer storage module is read by the new access point;

Wherein, the M2M refers to a machine to a machine. The method according to claim 1, further comprising:

When it is determined that the M2M terminal does not perform network switching, the M2M terminal directly reads the service data flow of the M2M application. The method according to claim 1 or 2, wherein determining whether the M2M terminal performs network switching comprises: using the acquired M2M terminal location and a signal strength of a current access point of the M2M terminal:

Transmitting, by the terminal side interface, the acquired M2M terminal location and the signal strength of the current access point of the M2M terminal to the positioning monitoring module;

And when the location monitoring module receives the signal strength of the M2M terminal location and the current access point of the M2M terminal, determining, by the decision control module, whether the M2M terminal performs network switching. The method according to claim 3, wherein, when the location monitoring module receives the signal strength of the M2M terminal location and the current access point of the M2M terminal, determining, by the decision control module, whether the M2M terminal performs Network switching includes:

Determining, by the decision control module, whether the M2M terminal location and the signal strength of the current access point of the M2M terminal meet the current service requirement; When the signal strength of the M2M terminal location and the current access point of the M2M terminal meets the current service requirement, the method further re-judges after a period of time;

When the M2M terminal location and the signal strength of the current access point of the M2M terminal do not meet the current service requirement, the M2M terminal is determined to perform network handover. The method according to claim 3 or 4, wherein when the M2M terminal is determined to perform network switching, the service data stream of the M2M application is temporarily stored in the buffer storage module, and the M2M terminal is triggered to perform the connection. The switching of the incoming network and the notification of the new access point to the M2M terminal include:

When it is determined that the M2M terminal performs network switching, the decision control module sends a switching signal to the application side interface and the terminal side interface respectively;

When the application side interface receives the switching signal, temporarily store the service data stream of the M2M application into the buffer storage module, and send the buffer storage address to the decision control module; Receiving the switching signal, triggering the M2M terminal to perform handover of the access network, and sending the configuration file to the M2M terminal;

The configuration file includes new access point information and configured operation script information. The method according to claim 5, wherein, after the M2M terminal accesses the new access point, reading, by the new access point, the service data flow in the buffer storage module includes:

After the M2M terminal accesses the new access point, acquiring a buffer storage address from the decision control module;

Reading, by the new access point and the obtained buffer storage address, the service data stream in the buffer storage module. An active switching device for an M2M terminal in an M2M network, including:

Obtaining a module, configured to separately obtain a location of the M2M terminal and a signal strength of the current access point of the M2M terminal;

The determining module is configured to determine whether the M2M terminal performs network switching by using the obtained M2M terminal location and the signal strength of the current access point of the M2M terminal;

The buffering and switching module is configured to temporarily store the service data stream of the M2M application into the buffer storage module when the M2M terminal performs the network switching, and trigger the M2M terminal to perform the switching of the access network and the new access Point notification to the M2M terminal; a reading module, configured to read, by the new access point, a service data flow in the buffer storage module after the M2M terminal accesses the new access point;

Wherein, the M2M refers to a machine to a machine. The device of claim 7, wherein the determining module comprises:

The sending unit is configured to send, by using the terminal side interface, the acquired M2M terminal location and the signal strength of the current access point of the M2M terminal to the positioning monitoring module;

The determining unit is configured to determine, by the decision control module, whether the M2M terminal performs network switching when the positioning monitoring module receives the signal strength of the M2M terminal location and the current access point of the M2M terminal. The device according to claim 8, wherein the buffering and switching module comprises:

Transmitting a switching signal unit, configured to: when determining that the M2M terminal performs network switching, the decision control module respectively sends a switching signal to the application side interface and the terminal side interface;

a buffer storage unit, configured to temporarily store the service data stream of the M2M application into the buffer storage module when the application side interface receives the switching signal, and send the buffer storage address to the decision control module;

a network switching unit, configured to: when the terminal side interface receives the switching signal, trigger the M2M terminal to perform the switching of the access network, and send the configuration file to the M2M terminal; wherein, the configuration file includes New access point information and configured operational script information. 0. The device according to claim 9, wherein the reading module comprises:

An obtaining unit, configured to acquire a buffer storage address from the decision control module after the M2M terminal accesses the new access point;

And the reading unit is configured to read the service data stream in the buffer storage module by using the new access point and the obtained buffer storage address.