WO2011097981A1

WO2011097981A1 - Method and system for radio access network (ran) selection

Info

Publication number: WO2011097981A1
Application number: PCT/CN2011/070493
Authority: WO
Inventors: 李勉; 刘霖; 朱春晖; 李志军
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-02-10
Filing date: 2011-01-21
Publication date: 2011-08-18
Also published as: CN102149166A; CN102149166B

Abstract

The present invention discloses a method and system for Radio Access Network (RAN) selection, wherein, the method includes: Base Station Subsystem (BSS) sends a system broadcast message, which is used to indicate the type of the BSS; User Equipment (UE), having received the system broadcast message, determines whether to select the BSS to access to the network, according to the type indicated by the system broadcast message. By the present invention, it can be ensured that UE selects the corresponding BSS rightly to access to core network, improving the success probability for UE to access to the radio network.

Description

TECHNICAL FIELD The present invention relates to the field of communications technologies, and in particular, to a method and system for selecting a wireless access network. BACKGROUND OF THE INVENTION Currently, the System Architecture Evolution (SAE) proposed by the standardization working group of the 3rd Generation Partnership Project (3GPP) makes an evolved packet network (Evolved Packet Core, referred to as EPC) provides higher transmission rates, shorter transmission delays, optimized packetization, and support for Universal Terrestrial Radio Access Network (Universal Terrestrial Radio Access Network)

UTRAN), Evolved UTRAN (E-UTRAN for short), Wireless Local Area Network (WLAN) and other non-3GPP access networks for mobility management. FIG. 1 is a schematic diagram of a current SAE architecture, where a network element constituting an E-UTRAN includes: an Evolved NodeB (eNodeB) for providing radio resources for user access; a packet data network (Packet Data Network) , referred to as PDN), a network that provides services to users. EPC provides lower latency and allows more wireless access systems to access. Unlike traditional human to human (H2H) communication, Machine to Machine (referred to as Μ2Μ) narrowly defined as machine-to-machine communication. Broadly defined as machine terminals. Intelligent interaction is the core, networked application and monthly service. It is based on intelligent machine terminals and provides access to a variety of communication methods to provide customers with information solutions to meet customer information needs for monitoring, command and dispatch, data collection and measurement. The 外部2Μ enables real-time monitoring of the external environment for a wide-ranging, automated collection of information. Μ2Μ can be used in industrial applications (eg, traffic monitoring, warning systems, marine assistance, vending machines, car-paying, etc.), home applications (eg, automatic meter reading, temperature control, etc.), personal applications (eg, life detection, Remote diagnosis, etc.). Data communication between one or more machines is called machine type communication ( Machine Type

Communication, referred to as MTC, is a machine that participates in MTC and is defined as an MTC device. MTC The device can communicate with other MTC devices or MTC servers through a Public Land Mobile Network (PLMN) network. A mobile device (Mobile Equipment, referred to as ME) is a function block attached to the MTC device, and the function block is used to connect the MTC device to the EPS system. The MTC Server manages and monitors MTC devices. FIG. 2 is a schematic diagram of a ME accessing an EPS through an EUTRAN in the prior art. In the actual networking, the M2M network and the H2H network have the following deployment modes according to the upgrade phase of the existing equipment and the operational load of the actual network: Mode 1: The H2H network and the M2M network have different PLMN IDs, and the wireless side Two systems are used separately from the core network side, as shown in Figure 3. Method 2: The H2H network and the M2M network belong to the same PLMN and have the same PLMN.

ID, the wireless side uses two sets of systems, and the core network is multiplexed. That is, different radio side network elements access the same MME, and the core network element is upgraded to support M2M, as shown in FIG. 4; mode 3: the H2H network and the M2M network belong to the same PLMN, have the same PLMN ID, and each Each has a wireless network and a core network. At this time, different wireless side network elements access their respective MMEs, as shown in Figure 3; Mode 4: The H2H network and the M2M network belong to the same PLMN, have the same PLMN ID, and the core network. Some MMEs on the side support both H2H and M2M. Some MMEs only support H2H, and some MMEs only support M2M, as shown in Figure 5. On the radio side, when the UE selects the accessing wireless network, the UE selects according to the PLMN ID in the broadcast message of the base station cell. For the first mode, the MTC system has its own PLMN ID. When the MTC UE is configured to broadcast in the cell, only the access is allowed. Entering the network corresponding to the MTC PLMN with the PLMN ID; for modes 2, 3, and 4, according to the carrier's policy, the base station subsystem in the wireless network may be dedicated to the M2M, may be dedicated to the H2H, or may be simultaneously Used for M2M and H2H communication. In terms of implementation, the base station subsystem dedicated to M2M can be specially deployed, or the existing base station subsystem can be upgraded to dynamically change its type according to factors such as network load. Therefore, for an M2M network and an H2H network having the same PLMN ID, the PLMN ID cannot be distinguished. Therefore, when the base station subsystem performs access differentiation and restriction for H2H and M2M communication, the UE cannot correctly select the corresponding device according to its own device type. The wireless network, such that the UE cannot access the wireless network. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method and system for selecting a wireless access network to solve at least the above problems. According to an aspect of the present invention, a method for selecting a radio access network is provided, including: a base station subsystem transmitting a system broadcast message, indicating a type of the base station subsystem; and receiving a user equipment of the system broadcast message According to the type indicated by the system broadcast message, it is determined whether the base station subsystem is selected to access the network. The sending, by the base station subsystem, the system broadcast message includes: the base station subsystem carrying the type identifier of the base station subsystem and the type identification number of the base station subsystem in the system broadcast message, indicating the type of the base station subsystem by using the type identifier and the type identification number The type identifier is used to indicate whether the base station subsystem is dedicated to the M2M, and the type identification number is used to indicate the user equipment that the base station subsystem is allowed to access. Preferably, the type identifier includes: an MTC communication identifier, configured to indicate at least one of: the base station subsystem is dedicated to M2M, the base station subsystem is dedicated to H2H, and the base station subsystem is shared by M2M and H2H. The above type identification number includes: a closed user group identification number, wherein the closed user group identification number is a number segment preset for use by the MTC communication. The type identification number includes: MTC group identification number. Preferably, the type identifier comprises: a closed user group identifier. If the mode of the base station subsystem is the closed mode, the type identification number includes: a closed user group identification number. If the mode of the base station subsystem is a hybrid mode or an open mode, the type identification number includes: a closed subscriber group identification number and an MTC communication identifier, where the MTC communication identifier is used to indicate whether the base station subsystem allows MTC communication. Preferably, the foregoing base station subsystem comprises at least one of the following: a NodeB subsystem, a home NodeB subsystem, an eNodeB subsystem, and a home eNodeB subsystem. According to another aspect of the present invention, a selection system for a wireless access network is provided, comprising: a base station subsystem and a user equipment. The base station subsystem is configured to send a system broadcast message, and the system broadcast message indicates the type of the base station subsystem; the user equipment is configured to receive the system broadcast message, and determine whether to select the base station according to the indication of the system broadcast message. The subsystem accesses the network. With the present invention, the base station subsystem indicates the type of the base station subsystem by using a system broadcast message, so that the user equipment can select whether to access the base station subsystem according to the type indicated by the system broadcast message, and solve the related art in that the UE is based on the PLMN. The ID is selected, and when the base station subsystem has the same PLMN ID but 40 pairs of H2H and M2M communication access differentiation and restriction, the problem of selecting a wireless network that does not match the UE is obtained, so that the UE can correctly select the corresponding The base station subsystem accesses the core network to improve the success rate of the UE accessing the wireless network. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a schematic diagram of an EPC system and an access network architecture in the related art; FIG. 2 is a schematic diagram of an MTC UE accessing an EPC system through an EUTRAN in the related art; FIG. 3 is a related art H2H network and an M2M network networking. FIG. 4 is a schematic diagram of the H2H network and the M2M network networking mode 2 in the related art; FIG. 5 is a schematic diagram of the H2H network and the M2M network networking mode 4 in the related art; FIG. 7 is a flowchart of a method for selecting a radio access network according to an embodiment of the present invention; FIG. 8 is a flowchart of a method for selecting an MTC UE according to an embodiment of the present invention; FIG. 9 is a flowchart of attaching an MTC UE in Embodiment 2 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. FIG. 6 is a schematic structural diagram of a selection system of a radio access network according to an embodiment of the present invention. As shown in FIG. 6, the system mainly includes: a base station subsystem 2 and a user equipment 4. The base station subsystem 2 is configured to send a system broadcast message to the user equipment 4, and the type of the base station subsystem 2 is indicated by the system broadcast message; the user equipment 4 is configured to receive the system broadcast message and determine according to the indication of the system broadcast message. Whether to select the base station subsystem 2 to access the network. In practical applications, the base station subsystem 2 includes, but is not limited to, one or a combination of the following: a NodeB subsystem, a Home NodeB subsystem, an eNodeB subsystem, and a Home eNodeB subsystem. The user equipment 4 includes but is not limited to: an H2H device, an MTC device. According to the above system provided by the embodiment of the present invention, the UE may select the base station subsystem corresponding to the base station subsystem to access the core network according to the type of the base station subsystem indicated by the system broadcast message, thereby improving the success rate of the wireless access and improving the user. Experience. A method for selecting a radio access network according to an embodiment of the present invention is described below, and the method can be implemented by a system as shown in FIG. 6. FIG. 7 is a flowchart of a method for selecting a radio access network according to an embodiment of the present invention. As shown in FIG. 7, the method mainly includes the following steps (step S702 - step S704): Step S702: The base station subsystem sends a system broadcast message. And indicating the type of the base station subsystem. Step S704: The UE that receives the system broadcast message determines whether the base station subsystem is selected to access the network according to the type of the base station subsystem indicated by the system broadcast message. With the foregoing method provided by the embodiment of the present invention, the UE may select a base station subsystem corresponding to the UE according to the indication of the system broadcast message sent by the base station subsystem, thereby improving the success rate of the access. The base station subsystem type may be jointly indicated by the type identifier of the base station subsystem and the type identification number of the base station subsystem; the base station subsystem may carry the type identifier and the type identification number of the base station subsystem in the transmitted system broadcast message. Wherein, the type identifier of the base station subsystem is used to indicate the Whether the base station subsystem is dedicated to M2M; and the type identification number is used to indicate the user equipment that the base station subsystem is allowed to access. The UE can learn whether the base station subsystem is dedicated to the M2M and the user equipment that the base station subsystem allows to access, and can determine whether the UE can be connected by using the type identifier and the type identification number of the base station subsystem carried in the system broadcast message. Enter the base station subsystem to achieve the purpose of selecting a suitable base station subsystem. In a specific implementation process, the type identifier of the base station subsystem may be indicated by defining a new MTC communication identifier, and the MTC communication identifier takes different values to indicate that the base station subsystem is dedicated to M2M, H2H dedicated or shared by M2M and H2H, due to MTC The value of the communication identifier is relatively small. Therefore, it is generally possible to pass two bits, so that it is not necessary to add excessive overhead. When the newly defined MTC communication identifier is used to indicate the type identifier of the base station subsystem, the type identification number of the base station subsystem may be multiplexed with the existing Closed Subscriber Group ID (CSG-ID). To indicate that in a specific application, the CSG-ID can be differentiated by a number segment in advance, and different numbers are respectively used for the home base station and the MTC communication, for example, if the CSG-ID of the start bit is 1 can be set. Used for the home base station, and set the CSG-ID whose start bit value is 0 to the MTC communication use, that is, the CSG-ID of the home base station indicated by the CSG-ID of the start bit of 1, and the CSG-ID of the start bit of 0. An MTC device for indicating that the base station subsystem allows access. In this way, the type identification number of the base station subsystem can be indicated by multiplexing the CSG-ID without additionally defining a new field. When the newly defined MTC communication identifier is used to indicate the type identifier of the base station subsystem, the base station subsystem type identification number may also be indicated by an MTC group identification number (MTC Group ID) indicating the base station subsystem. The MTC group where the MTC device is allowed to access. In this way, the length of the indication information indicating the type identification number can be reduced, and the overhead of system resources can be reduced. In a specific implementation process, the existing closed subscriber group identifier may also be used to indicate the type identification of the base station subsystem. In this case, the MTC device is processed as an existing CSG user. In the existing system, the closed subscriber group identifier is generally a bit, by which the base station subsystem can be instructed to be M2M-specific. For example, when the bit value is 1, the mode indicating the base station subsystem is In the closed mode, the base station subsystem is dedicated to M2M; when the bit value is 0, the mode indicating the base station subsystem is a mixed mode or an open mode, that is, the base station subsystem is not dedicated to M2M. When the type of the base station subsystem is identified as a closed subscriber group identifier, if the mode of the current base station subsystem is in the closed mode, the type identification number of the base station subsystem may use the existing CSG-ID that does not need to be differentiated by the number segment. Instructing, by using the value of the CSG-ID, indicating which MTC devices are allowed to access the base station subsystem; In this manner, the type identification number of the base station subsystem can be indicated by the CSG-ID, and the existing CSG is effectively utilized. -ID. In addition, when the type identifier of the base station subsystem is indicated by the closed subscriber group identifier, if the mode of the current base station subsystem is in the hybrid mode or the open mode, the type identification number of the base station subsystem may be used without existing The CSG-ID of the segment is used to indicate, by using the value of the CSG-ID, which MTC device is allowed to access the base station subsystem, and the type identification number of the base station subsystem further includes the newly defined MTC communication identifier. The newly defined MTC communication identifier indicates whether the base station subsystem allows MTC communication. In this case, the MTC communication identifier requires only one bit to indicate whether the base station subsystem allows MTC communication, thereby reducing the overhead of system resources. In the embodiment of the present invention, the foregoing base station subsystem includes, but is not limited to, one of the following or any combination thereof: a NodeB subsystem, a Home NodeB subsystem, an eNodeB subsystem, and a Home eNodeB subsystem. The technical solutions provided by the embodiments of the present invention are described in detail below through specific embodiments. Embodiment 1 In this embodiment, an MTC UE selects an M2M dedicated base station subsystem for attachment according to a system broadcast message sent by a base station subsystem in E-UTRAN as an example. FIG. 8 is a flowchart of the embodiment. As shown in FIG. 8, the method mainly includes the following steps: Step 801: When the UE performs 'j, area selection, or reselection, the system information acquisition process is initiated. At this time, the UE receives the E- a system broadcast message sent by the UTRAN to the UE: a Master Information Block; Step 802: The UE receives a system broadcast message sent by the E-UTRAN to the UE: System Information Block Type 1 (System Information Block Type 1), in the message The carried parameter indicates the type of the base station subsystem; in this embodiment, the type of the base station subsystem is jointly indicated by the type identifier of the base station subsystem and the type identification number of the base station subsystem. Wherein, the type identifier of the base station subsystem can pass

A new MTC communication identifier is defined in the SystemlnformationBlockType 1 message block to indicate that the base station subsystem is M2M dedicated, H2H dedicated or M2M and H2H shared by different values; when the MTC communication identifier is used to indicate the type identifier of the base station subsystem The type identification number of the base station subsystem may be multiplexed with a closed subscriber group identification number (CSG-Identity) in the existing System Information Block Type1 message block to indicate, and the CSG-Identity is distinguished by a number segment, respectively, for the home base station and MTC communication is used. The CSG-Identity used for MTC communication can be used to identify which MTC devices are allowed to access the base station subsystem. When the MTC communication identifier is used to indicate the type identifier of the base station subsystem, the type identification number of the base station subsystem can also be in the SystemlnformationBlockType. The MTC group ID (MTC Group ID) is used in the message block to indicate which MTC devices are allowed to access the base station subsystem; or the type identifier of the base station subsystem can also be used in the existing System Information Block Type1 message block. Close the user group identifier (CSG-Indication) to indicate that, in this case, the MTC device is processed as an existing CSG user; in this case, the type identification number of the base station subsystem can use the existing System The CSG-Identity in the Information Block Typel message block does not need to be segmented to identify which MTC devices are allowed to access the base station subsystem; and, when the CSG-Indication indicates that the base station subsystem is in the closed mode, only restrictions are allowed by the restriction. The MTC UE signs the CSG-Identity, and the base station subsystem can be dedicated to the MTC; and when the CSG-Indication indicates The base station subsystem is mixed or open mode, can use a newly defined MTC communication type identifier indicates the identification number of the base station subsystem, this time by a different value indicates whether to allow the MTC communication. Step 803: The UE receives the system broadcast message sent by the E-UTRAN to the UE: System Information. Step 804: The MTC UE determines to allow access to the base station subsystem according to the type of the base station subsystem indicated by the system broadcast message. Step 805 : The MTC UE initiates the attach procedure. It should be noted that, in this embodiment, the foregoing base station subsystem includes: an eNodeB subsystem and/or a Home eNodeB subsystem. With this embodiment, the MTC UE can select the M2M dedicated base station subsystem for attachment according to the indication of the system broadcast message sent by the base station subsystem in the E-UTRAN. Embodiment 2 In this embodiment, an M2 UE is selected according to a system broadcast message sent by a base station subsystem in a UTRAN to select an M2M dedicated base station subsystem for attachment. FIG. 9 is a flowchart of the embodiment. As shown in FIG. 9, the method includes the following steps: Step 901: A system broadcast message sent by the UTRAN: System Information, where parameters carried in the message indicate the base station subsystem Type; In this embodiment, the type of the base station subsystem is jointly indicated by the type identifier of the base station subsystem and the type identification number of the base station subsystem. The type identifier of the base station subsystem may be defined by a new MTC communication identifier, indicating that the base station subsystem is M2M dedicated, H2H dedicated, or M2M and H2H shared by different values; in this case, the newly defined MTC Communication ID can be added to Master Information

In the Block message block, the port can also be added in the System Information Block Type 3 message block; and the type identification number of the base station subsystem can reuse the closed user group identification number in the existing System Information Block Type 3 message block ( CSG Identity) indicates that the CSG-Identity is differentiated by a number segment for use by the home base station and the MTC communication. The CSG-Identity used for MTC communication can be used to identify which MTC devices are allowed to access the base station subsystem; or, in this case, the type identification number of the base station subsystem can also use the MTC Group ID (MTC Group ID) To indicate which MTC devices are allowed to access the base station subsystem; and, the MTC Group ID can be added to the Master Information Block message block, or it can be added to the System Information Block Type 3 message block. In addition, the type identification of the base station subsystem can also use the existing Master Information.

A closed subscriber group identifier (CSG-Indicator) in the Block message block to indicate that the MTC device is handled as an existing CSG user; In this case, the type identification number of the base station subsystem may be indicated by using CSG-Identity in the existing System Information Block Type 3 message block without segmentation to identify which MTC devices are allowed to access the base station. Subsystem. Moreover, when the CSG-Indicator indicates that the base station subsystem is in the closed mode, the base station subsystem may be dedicated to the MTC by restricting only the MTC UE to subscribe to the CSG-Identity; or, when the CSG-Indicator indicates that the base station subsystem is a hybrid In the mode or the open mode, the newly defined MTC communication identifier indication may also be used to indicate whether the MTC communication is allowed by different values; the newly defined MTC communication target i can only be added in the Master Information Block message block, or Add force port in the System Information Block Type 3 message block. Step 902: The MTC UE determines to allow access to the base station subsystem according to the type of the base station subsystem indicated by the system broadcast message. Step 903: The MTC UE initiates an attach procedure. It should be noted that, in this embodiment, the base station subsystem includes: a NodeB subsystem and a Home NodeB subsystem. With this embodiment, the MTC UE can select the M2M-dedicated base station subsystem to attach according to the indication of the system broadcast message sent by the base station subsystem in the UTRAN. From the above description, it can be seen that, in the embodiment of the present invention, the base station subsystem indicates the type of the base station subsystem by using a system broadcast message, so that the user equipment can select whether to access the type according to the type indicated by the system broadcast message. The base station subsystem solves the problem in the related art that the UE selects the wireless network that does not match the UE due to the selection by the UE according to the PLMN ID, so that the UE can correctly select the corresponding base station subsystem to access the core network. Improve the success rate of the UE accessing the wireless network. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. Perform the steps shown or described, or separate them into individual integrated circuit modules, or make multiple modules or steps in them Implemented as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for selecting a wireless access network, comprising:

The base station subsystem sends a system broadcast message, which is used to indicate the type of the base station subsystem; and the user equipment that receives the system broadcast message determines whether to select the base station subsystem to access the network according to the type indicated by the system broadcast message. .

2. The method according to claim 1, wherein the sending, by the base station subsystem, the system broadcast message comprises:

The base station subsystem carries a type identifier of the base station subsystem and a type identification number of the base station subsystem in the system broadcast message, and the base station subsystem is indicated by the type identifier and the type identifier number. Types of;

The type identifier is used to indicate whether the base station subsystem is dedicated to the machine to the machine M2M, and the type identification number is used to indicate the user equipment that the base station subsystem is allowed to access.

The method according to claim 2, wherein the type identifier comprises: a machine type communication MTC communication identifier, configured to indicate at least one of: the base station subsystem is M2M dedicated, and the base station subsystem is a human pair Dedicated to human H2H, the base station subsystem is shared by M2M and H2H.

The method according to claim 3, wherein the type identification number comprises: a closed user group identification number, wherein the closed user group identification number is a number segment preset for use by the MTC communication.

The method according to claim 3, wherein the type identification number comprises: an MTC group identification number.

The method according to claim 2, wherein the type identifier comprises: a closed user group identifier.

7. The method according to claim 6, wherein if the mode of the base station subsystem is a closed mode, the type identification number comprises: a closed user group identification number.

The method according to claim 6, wherein, if the mode of the base station subsystem is a hybrid mode or an open mode, the type identification number comprises: a closed user group identification number and an MTC communication identifier, where The MTC communication identifier is used to indicate whether the base station subsystem allows MTC communication.

The method according to any one of claims 1 to 8, wherein the base station subsystem comprises at least one of the following: a NodeB subsystem, a home NodeB subsystem, an eNodeB subsystem, and a home eNodeB subsystem.

A system for selecting a radio access network, comprising: a base station subsystem and a user equipment, wherein the base station subsystem is configured to send a system broadcast message, and the type of the base station subsystem is indicated by the system broadcast message ;

The user equipment is configured to receive the system broadcast message, and determine whether to select the base station subsystem to access the network according to the indication of the system broadcast message.