WO2012058966A1

WO2012058966A1 - Admission control method, target network, source network, and handover processing system

Info

Publication number: WO2012058966A1
Application number: PCT/CN2011/078498
Authority: WO
Inventors: 邓云; 戴谦; 艾建勋; 毛磊
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-11-05
Filing date: 2011-08-16
Publication date: 2012-05-10
Also published as: CN102469543B; CN102469543A

Abstract

Disclosed are an admission control method, a target network, a source network, and a handover processing system. According to the method: a target network receives handover request signaling from a source network, the request signaling comprising property information of a terminal and quality of service parameters of a radio access bearer; and the target network performs admission control according to the property information and the quality of service parameters. In the present invention, handover capability and network stability are enhanced.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to an admission control method, a target network side, a source network side, and a handover processing system. BACKGROUND OF THE INVENTION Human to Human (H2H) communication, the existing wireless communication technology is developed based on H2H communication by communicating with the operation of the device. In H2H communication, people use H2H equipment to User equipment (User Equipment, UE for short) in the normal sense implements communication. Machine-to-machine (M2M) is defined in a narrow sense as machine-to-machine communication. Broadly defined, it is a networked application and service centered on intelligent interaction of machine terminals. It is based on intelligent machine terminals, with multiple communication methods as access means, providing customers with information solutions to meet customer information needs for monitoring, command and dispatch, data acquisition and measurement. The development of wireless technology is an important factor in the development of the M2M market. It breaks through the space-time constraints and geographical barriers of traditional communication methods, freeing enterprises and the public from cable shackles, allowing customers to more effectively control costs, reduce installation costs, and is simple to use. . In addition, the growing demand is driving M2M to keep moving forward. Contrary to the continuous growth of information processing capabilities and network bandwidth, the means of information acquisition are far behind, and M2M satisfies people's needs. It allows people to monitor the external environment in real time, enabling a wide range of automated information collection. Therefore, M2M can be widely used in industrial applications, home applications, personal applications, and the like. Industry applications such as: traffic monitoring, warning systems, maritime rescue, vending machines, paying for cars, etc. Home applications such as: automatic meter reading, temperature control, etc. Personal applications such as: life detection, remote diagnosis, etc.

M2M's communication objects are machine-to-machine and human-to-machine. Data communication between one or more machines is defined as MTC (Machine Type Communication), in which case human interaction is less required. The machine participating in the MTC is defined as an MTC device (MTC device, abbreviated as MD). The MTC device is a terminal of the MTC user, and can communicate with the MTC device and the MTC server through the PLMN network. After the M2M application is introduced, the existing system can be optimized according to its characteristics to meet the requirements of the M2M application and has no impact on the common user equipment in the existing system. Some notable features of M2M applications are: MTC devices are numerous, the amount of data transmitted per time is small, the transmission interval is large, and the position is relatively fixed. In view of the large number of MTC devices, and the number of common UEs, that is, H2H devices, is not an order of magnitude, the widespread application of MTC devices is likely to overload the network, such as when a cell suddenly has a power outage, when the power is restored, Many MTC devices may attempt to access the network at the same time, which will cause the network to be overloaded. In order to cope with the overload caused by the introduction of the MTC device, the network side needs to improve the overload control capability. The existing protocol requires the core network element to have a new processing overload capability, such as the Long Term Evolution (LTE) system. The Mobility Management Entity (MME) needs to be implemented according to the traffic volume (the maximum number of active bearers, the maximum bearer rate, etc.) of the access point name (APN) reported by the MTC device. Based on the APN overload control, an Attach Reject location area update rejection may be sent to the UE. The base station on the network side also needs to have the capability of implementing different access control according to the identity of the access terminal (whether it is an MTC device), for example, the base station restricts access of certain MTC devices through RRC Connection Reject signaling. In the related art, the admission control (Admission Control) adopted by different base stations to the accessed MTC devices may also be different due to different real-time loads of different base stations and different MMEs. For a terminal that has access to the network, the system network side needs to implement different access control policies when it is switched. As a result, multiple types of terminals in the related technology may cause network overload and reduce network switching capability. SUMMARY OF THE INVENTION A primary object of the present invention is to provide an admission control method, a target network side, a source network side, and a handover processing system, to at least solve the above-mentioned related art when multiple types of terminals perform handover, which may cause network overload and reduce network handover. The problem of ability. According to an aspect of the invention, an admission control method is provided. The admission control method according to the present invention includes: the target network side receives the handover request signaling sent by the source network side, where the request signaling includes the attribute information of the terminal and the quality of service parameter of the radio access bearer; and the target network side according to the attribute information and the service Quality parameters are accepted for acceptance. The attribute information includes one or a combination of the following: type information of the terminal, service type of the terminal, group information of the terminal, priority information of the terminal, priority information of the service established by the terminal, service model information established by the terminal, and access of the terminal Level information, information about terminal roaming. The target network side performs admission control according to the attribute information and the QoS parameter. The target network side determines whether to allow the terminal corresponding to the attribute information to perform handover according to one or a combination of the following: The access control requirement or overload control of the core network to the target network side The demand, the load status on the target network side, and the operation and maintenance server requirements; if the judgment result is yes and the demand for the quality of service parameters is met, the target network side allows the terminal to perform the handover; otherwise, the terminal is refused to perform the handover. After the target network side allows the terminal to perform the handover, the method further includes: the target network side sends the handover request acknowledgement signaling to the source network side; after the target network side rejects the terminal to perform the handover, the method further includes: the target network side sends the handover preparation to the source network side Failure signaling. The reason for the handover failure is that the handover failure signaling carries the reason for the handover failure. The reasons include the following: The reason why the terminal accessing the type information is not allowed, the reason why the terminal information of the packet information is not allowed, and the terminal access of the priority information is not allowed. The reason for the terminal access that does not allow the establishment of the priority information of the service, the reason for the terminal access that does not allow the establishment of the service model information, and the reason for the terminal access of the access level information is not allowed. In the Wideband Code Division Multiple Access (WCDMA) system, the handover request signaling is relocation request signaling, and the handover preparation failure signaling is relocation preparation failure signaling. The handover request signaling sent by the source network side on the target network side includes: the target network side receives the handover request signaling sent by the source network side through the direct interface; or the target network side receives the handover request signaling sent by the source network side through the core network. In a Long Term Evolution (LTE) system, the source network side is the source base station, and the target network side is the target base station; in the wideband code division multiple access system, the source network side is the source radio network controller, and the target network side is the target radio network control. The terminal includes: a machine type communication device and/or a person-to-person communication device. In order to achieve the above object, according to another aspect of the present invention, a target network side is provided. The target network side according to the present invention includes: a receiving module, configured to receive the handover request signaling sent by the source network side, where the request signaling includes the attribute information of the terminal and the quality of service parameter of the radio access bearer; and the control module is configured to Admission control based on attribute information and quality of service parameters. The attribute information includes one or a combination of the following: type information of the terminal, service type of the terminal, group information of the terminal, priority information of the terminal, priority information of the service established by the terminal, service model information established by the terminal, and access of the terminal Level information, information about terminal roaming. The control module includes: a determining submodule, configured to determine whether to allow the terminal corresponding to the attribute information to perform handover according to one or a combination of the following: an access control requirement or an overload control requirement of the core network to the target network side, and a load status of the target network side The operation of the operation and maintenance server; the first determining sub-module is configured to allow the terminal to switch when the judgment result of the sub-module is yes and meets the requirement of the service quality parameter; the second determining sub-module is set to be judged When the judgment result of the sub-module is NO, it is determined that the terminal is refused to perform the handover. The control module further includes: a first sending submodule, configured to send a handover request acknowledgement signaling to the source network side; and a second sending submodule configured to send the handover preparation failure signaling to the source network side. In order to implement the present invention, in accordance with an aspect of the present invention, a source network side is provided. The source network side according to the present invention includes: a sending module, configured to send handover request signaling to the target network side, where the request signaling includes attribute information of the terminal. In order to implement the present invention, in accordance with an aspect of the present invention, a handover processing system is provided. The handover processing system according to the present invention includes: the source network side described above and the target network side described above. With the present invention, the target network side is used to receive the handover request information of the terminal carrying the attribute information of the terminal and the quality of service parameters of the radio access bearer, and then perform admission control according to the attribute information and the quality of service parameter. The invention solves the problem that the network overload may be caused when multiple types of terminals are switched in the related art, and improves the switching capability of the network and the stability of the network. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a schematic diagram of a network layout of an LTE system according to the related art; FIG. 2 is a schematic diagram of a network layout of a WCDMA system according to the related art; FIG. 3 is a flowchart of an admission control method according to an embodiment of the present invention; 4 is a flowchart 1 of a handover processing method according to a preferred embodiment of the present invention; FIG. 5 is a flowchart 2 of a handover processing method according to a preferred embodiment of the present invention; FIG. 6 is a flowchart of a handover processing method according to a preferred embodiment of the present invention. FIG. 7 is a structural block diagram of a target network side according to an embodiment of the present invention; FIG. 8 is a block diagram showing a preferred structure of a target network side according to an embodiment of the present invention; FIG. 9 is a structure of a source network side according to an embodiment of the present invention. block diagram; Figure 10 is a block diagram showing the structure of an admission control system in accordance with an embodiment 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. The embodiment provides a method for the admission control. FIG. 3 is a flowchart of the admission control method according to the embodiment of the present invention. As shown in FIG. 3, the method includes: Step S302: The target network side receives the handover sent by the source network side. Requesting signaling, where the request signaling includes the attribute information of the terminal and the quality of service (QoS) of the radio access bearer; Step S304: The target network side according to the attribute information of the terminal and the radio access bearer The quality of service parameters are subject to admission control. Through the above steps, the target network side receives the handover request signaling carrying the attribute information of the terminal from the source network side, and then implements the admission control according to the QoS and the attribute information. The problem that the handover decision can not be effectively implemented for different types of terminals when the multi-type terminals are switched in the related art is overcome, the load control requirements of different access network elements are satisfied, and the performance of the network is improved. Preferably, the existing QoS can be extended to include the attribute information of the terminal. At this time, the target network side implements the admission control according to the QoS, and considers the attribute information of the terminal in the QoS in the admission control. Preferably, the attribute information includes one or a combination of the following: type information of the terminal, service type of the terminal, group information of the terminal, priority information of the terminal, priority information of the terminal establishment service, service model information established by the terminal, and terminal Access level information, information about terminal roaming. With the preferred embodiment, the admission control is performed according to the above attribute information of the terminal, and the accuracy of the handover is improved. Preferably, the target network side performs the admission control according to the attribute information and the QoS parameter. The target network side determines whether to allow the terminal corresponding to the attribute information to perform handover according to one or a combination of the following: The core network controls the access control of the target network side. Or overload control demand, load status on the target network side, operation and maintenance server requirements; if the judgment result is yes, and the target network side meets the service quality parameter requirement, the target network side allows the terminal to perform handover; otherwise, the terminal is refused to perform handover. . With the preferred embodiment, the target network side determines whether to switch or reject the terminal according to the foregoing three factors and the quality of service parameters, thereby improving the accuracy and efficiency of the target network side admission control. Preferably, after the target network side allows the terminal to perform the handover, the method further includes: the target network side sends the handover request acknowledgement signaling to the source network side; after the target network side rejects the terminal to perform the handover, the method further includes: the target network side source The network side sends handover preparation failure signaling. With the preferred embodiment, the information is transmitted using existing signaling, reducing development costs. Preferably, the handover preparation failure signaling carries a reason for the handover failure, and the reason includes one of the following: a reason why the terminal of the type information is not allowed to be accessed, a reason why the terminal of the packet information is not allowed to be accessed, and the reason is not allowed. The reason for the terminal access of the priority information is not allowed to be accessed by the terminal that establishes the service priority information, and the reason for the terminal access of the established service model information is not allowed, and the terminal of the access level information is not allowed to be connected. The reason for the entry. With the preferred embodiment, the source network side can use the reason for the failure in the handover preparation failure signaling for the subsequent handover procedure, thereby improving the efficiency of the terminal handover. Preferably, in the Wideband Code Division Multiple Access System (WCDMA), the handover request signaling is relocation request signaling, and the handover preparation failure signaling is relocation preparation failure signaling. With the preferred embodiment, in the WCDMA system, the existing signaling is used to transmit information, which reduces the development cost. Preferably, the target network side receives the handover request signaling sent by the source network side, where: the target network side receives the handover request signaling sent by the source network side through the direct interface; or the target network side receives the handover request sent by the source network side through the core network. Signaling. With the preferred embodiment, the target network side can receive the handover request signaling sent by the source network side directly or through the core network, which improves the flexibility of transmitting the handover request signaling. Preferably, in a Long Term Evolution (LTE) system, the source network side is a source base station, and the target network side is a target base station; in a Wideband Code Division Multiple Access (WCDMA) system, the source network side is a source radio network controller (RNC) The target network side is the target RNC. With the preferred embodiment, handover is performed between base stations in an LTE system, and handover is performed between RNCs in a WCDMA system. Preferably, the terminal comprises a machine type communication device (MTC device) and/or a person to person communication device (H2H device). It should be noted that the target network side implements the admission control according to the QoS, in order to ensure that the target network side can meet the resource requirements of the radio access bearer established by the terminal. The implementation of the admission control by the target network side according to the attribute information of the terminal refers to the target network side after considering the core network's access control requirements or overload control requirements, its own load status, and/or the operation and maintenance server requirements. Whether to allow the terminal to access the decision. If the target network side implements the admission control according to the attribute information of the terminal, that is, the target network side allows the terminal access of the attribute, and the target network side succeeds in implementing the admission control according to the QoS, then the handover request is sent to the source network side. Confirmation signaling; if the target network side fails to implement the admission control according to the attribute information of the terminal, the handover preparation failure signaling is sent to the source network side. The first embodiment is based on the LTE system. The network layout of the LTE system is as shown in FIG. 1. The S1 interface exists between the base station and the core network element MME, and an X2 interface exists between adjacent base stations. In this embodiment, the base station 1 is the source base station, that is, the source network side, and the base station 2 is the target base station, that is, the target network side. The MTC device is in a connected state in the cell under the jurisdiction of the base station 1. The MTC device is a low-priority MTC device, or the device access network is a low-priority access, where the low-priority or low-priority access is a network. The side and the MTC device pre-agreed, or the MTC device is preset to a low priority. The lower priority can be divided according to the type of the terminal. For example, the MTC device is a low-priority terminal, and the normal H2H device is a normal-priority terminal. In the future, more types of terminals can be introduced, and the priority of the terminal is divided into A finer scenario, such as dividing a terminal with more than two priorities; or determining a priority according to the service nature of the MTC device. For a meter-type terminal, the initiated service is mainly used to indicate the scale value of the meter, and the MTC device of this type is When the network accesses the network, an indication of low priority is indicated to the network side, and other MTC devices, such as monitoring or alarming, indicate an indication of normal priority to the network side when accessing the network.

The MTC device needs to measure neighboring cells in the base station 1 in order to achieve mobility. After receiving the measurement report that the signal quality of the neighboring cell reported by the MTC device is higher than the predetermined threshold, the base station 1 makes a handover decision, and the target cell of the handover is located at the base station 2. The process of the handover is as shown in FIG. 4: Step S401, source The base station sends a handover request (Handover Request) to the target base station. Here, there is an X2 interface between the source base station and the target base station. The handover request includes a Quality of Service (QoS) parameter of the E-UTRAN Radio Access Bearer (E-RAB) established by the MTC device, configuration information of the source cell, and the like. In order to implement the present invention, the handover request further includes information indicating the attributes of the MTC device. In this embodiment, the information indicating the attributes of the MTC device is represented by the priority of the MTC device, where the identifier or sequence number of the low priority is referred to herein. If the attribute of the MTC device is represented by a sequence number, the sequence number is a pre-agreed sequence number indicating that the MTC device is a low priority. Step S402: After receiving the handover request, the target base station performs admission control according to the QoS parameters included in the handover request and the attributes of the MTC device, and implementing admission control according to the QoS parameters is sufficient to ensure that the MTC device accesses the target base station. The use of the resource can meet the requirements of the QoS after the handover. The admission control according to the attributes of the MTC device ensures that different access network elements (here, the base station) can adopt different access policies. On the one hand, different base stations may be connected to different core network elements (MMEs), and different MMEs may send different access restriction information to the base station. For example, the access restriction information sent by the MME to the base station 2 in this embodiment is not allowed to be low. The priority MTC device accesses; on the other hand, the load of different base stations is different, the base station can adopt different access policies according to the load; in addition, the base station needs to consider the background operation and maintenance service of the connection The requirements of Operation & Management (OAM for short) implement admission control on the terminal. In this embodiment, although the load of the target cell (belonging to the base station 2) is not high, and there are sufficient resources to ensure that the MTC device establishes the QoS parameter of the E-RAB, the MME connected to the base station 2 does not allow the low priority MTC device. Access, therefore, in this embodiment, the base station 2 does not allow the low priority MTC device to access, and the admission control fails. Step S403: The target base station sends a handover preparation failure (Handover Preparation Failure) to the source base station, where the failure signaling further includes a reason for not allowing the low priority MTC device to access. Step S404: After receiving the handover preparation failure, the source base station learns that the target base station does not allow the low-priority MTC device to access, and then avoids sending the handover request signaling to the base station. Since the MTC device needs to move, the source base station selects a cell belonging to the base station 3 as a target cell from the measurement report reported by the MTC device, and the base station 3 becomes the target base station. The source base station transmits a handover request to the base station 3. The handover request includes a quality of service parameter of the radio access bearer established by the MTC device, configuration information of the source cell, and the like. In order to implement the present invention, the handover request further includes information indicating the attributes of the MTC device. In this embodiment, the information indicating the attributes of the MTC device is represented by the priority of the MTC device, where the identifier or sequence number of the low priority is referred to herein. Step S405: After receiving the handover request, the target base station performs access control according to the QoS parameters included in the handover request and the attributes of the MTC device, and performing admission control according to the QoS parameters is to ensure that the MTC device has sufficient resources after accessing the target base station. The QoS requirements can be met; the admission control is implemented according to the attributes of the MTC device to ensure that different access network elements can adopt different access policies. In this embodiment, the MME connected to the base station 3 allows all the priority MTC devices to access, and the lower load of the base station 3 itself allows the new MTC device to access. Therefore, the admission control of the handover request by the base station 3 is successful. Step S406: The base station 3 sends Handover Request Acknowledge signaling to the source base station, where the handover request acknowledgement signaling includes resource information allocated by the base station 3 for the MTC device. Step S407: After receiving the handover request acknowledgement signaling, the source base station sends a handover command to the MTC device. In the existing LTE system, the source base station transmits a handover command to the MTC device by using an RRC connection reconfiguration message carrying mobility control information. Step S408: The MTC obtains synchronization with the target cell, initiates random access in the target cell, and sends handover complete signaling (RRC connection reconfiguration complete) to the target base station. At this point, the MTC device switches to the target cell. In this embodiment, the target base station learns the attribute information of the accessed MTC device by using the handover request, and can implement the admission control according to this, so as to avoid the handover or the connection release caused by the terminal switching to the inappropriate target network side. In this embodiment, the attribute of the MTC device refers to the priority information of the MTC device, and the priority of the MTC device may be divided into two levels or multiple levels, such as low priority and normal priority, or low priority, normal. Priority and high priority, etc. Different access network elements can adopt different access control policies for different priority MTC devices. The attributes of the MTC device may also be other information indicating the terminal, such as whether it is an MTC device (that is, type information of the terminal); or grouping information of the terminal, different MTC devices belong to different group groups, and each group has a specific group. The identifier or group serial number; or the priority information of the service established by the terminal, the priority identifier of the service that the terminal has established, the priority number of the service pre-agreed by the network side and the user equipment, or the priority identifier of the service; or the service established by the terminal The model information refers to the data communication model information of the service, and includes a combination of one or more of the following features: data interaction periodicity, data interaction frequency, data volume size; or terminal access class information. Refers to the access level identifier of the terminal, the access level sequence number or the access level identifier pre-agreed by the network side and the user equipment; or the information of the terminal roaming, whether the terminal is a roaming terminal, or a public land mobile network indicating that the terminal is contracted. Identify, or indicate the terminal's HPLMN (Home Public Land Mobile Network, Ben Public Land Mobile Network) Wo P / or EHPLMN (Equivalent Home PLMN, equivalent Home Public Land Mobile Network). Different access network elements can adopt different access policies for the attributes of the terminal. After obtaining the attribute information of the terminal, the target network side can implement admission control according to this, and avoid accessing inappropriate terminals. At the same time, different resource allocation strategies can be adopted according to this. For example, for a low-priority MTC device, the target network side has fewer resources for pre-configuration or reservation, as long as it can meet its minimum QoS requirement, The resources of other terminals cannot be preempted. For normal priority or high-priority MTC devices, the resources that are pre-configured or reserved by the target network side are sufficient to fully meet the QoS requirements, such as the maximum bit rate included in the QoS ( Maximum Bit Rate), the target network side reserves resources according to the maximum bit rate, and can preempt resources of other low priority terminals. In this embodiment, the base station sends the handover signaling through the X2 interface. If there is no X2 interface between the base stations, the base station transmits the handover signaling through the core network. The method in this embodiment is also applicable. The handover request signaling transmitted to the target base station through the core network includes terminal attribute information, and the target network side performs admission control and resource allocation accordingly. The second embodiment is based on the WCDMA system. The network layout of the WCDMA system is as shown in FIG. 2. The radio network controller (Radio Network Controller, RNC for short) is connected to the core network element through the Iu interface. The Iur interface has an Iub interface between the RNC and its base station. In this embodiment, the RNC1 is the source RNC, that is, the source network side, and the RNC2 is the target RNC, that is, the target network side. The MTC device is in the connected state of the RNC1. The radio access bearer (RAB) established by the MTC device is a normal priority. For example, according to the time tolerance of the service, for the meter service, If the time tolerance of the service is long, the service established by the MTC device of the meter is low-priority. For the monitoring device, the service is not time-tolerant. If the service report data needs to be established immediately, the service initiated by the monitoring device is normal. Level, or high priority. In this embodiment, the normal priority is pre-determined by the network side and the MTC device, and the services initiated by the MTC device are all normal priorities; or the service priority assigned by the network side is the normal priority. Although the parameter indicating the priority of the service in the existing protocol is the Allocation and Retention Priority (ARP) in the QoS, in order to indicate the difference between the MTC device and the H2H device, it is necessary to newly establish the MTC establishment. The normal priority of the identifier; or the pre-agreed between the network side and the MTC device (that is, the protocol agreement). The value of an ARP indicates that the service established by the MTC device is of normal priority. In this case, the protocol needs to set up the ARP and the MTC device. The mapping relationship of the service, such as the Priority cell in the ARP specified by the protocol, when the value is 1, indicates that the service established by the MTC device is a normal priority.

The MTC device needs to measure neighboring cells in RNC1 in order to implement mobility. After receiving the measurement report that the signal quality of the neighboring cell reported by the MTC device is higher than the predetermined threshold, the RNC1 makes a handover decision, and the handover target cell is located at the RNC2, and the handover process is as shown in FIG. 5: Step S501, the source network side A relocation request is sent to the target network side, where an Iur interface exists between the source RNC and the target RNC. The relocation request includes a quality of service parameter of the radio access bearer established by the MTC device, configuration information of the source cell, and the like. In order to implement the present invention, the relocation request further includes information indicating the attributes of the MTC device. In this embodiment, the information indicating the attributes of the MTC device refers to the identifier of the normal priority of the MTC establishment service. Step S502: After receiving the relocation request, the target network side performs admission control according to the QoS parameters included in the relocation request and the attributes of the MTC device, and implementing access control according to the QoS parameter is sufficient to ensure that the MTC device accesses the target network side. The resource usage can meet the requirements of QoS. The admission control according to the attributes of the MTC device ensures that different access network elements can adopt different access policies. In this embodiment, the core network element connected to the target RNC allows the MTC device to establish normal priority service access, and the target RNC itself is negative. A lower load allows new MTC devices to be accessed. Therefore, the admission control of the relocation request by the target RNC is successful. The target network side can also adopt different resource allocation policies according to the attributes of the MTC device. Here, the service established by the MTC device is a normal priority, and the target network side can allocate resources according to the maximum bit rate when allocating resources, if the resources are insufficient. At the same time, resources of the low-priority MTC device can also be preempted. Step S503: The target network side sends a relocation response (Relocation Response) signaling to the source network side, where the relocation response signaling includes resource information allocated by the target network side for the MTC device. Step S504: After receiving the relocation response signaling, the source network side sends a handover command to the MTC device. In the existing WCDMA system, the source network side sends a handover command to the MTC device through the radio access bearer reconfiguration message. Step S505: The MTC device obtains synchronization with the target cell, and sends handover completion signaling (radio access bearer reconfiguration complete signaling) to the target RNC. At this point, the MTC device switches to the target cell. In this embodiment, the attribute of the MTC device refers to the priority information of the service established by the MTC device, and the priority of the service established by the MTC device may be divided into two levels or multiple levels, such as low priority and normal priority, or low. Priority, normal priority, high priority, etc. Different access network NEs can adopt different access control policies for different service priorities. The attribute of the MTC device may also be other information that characterizes the terminal, such as whether it is an MTC device (ie, type information of the terminal); or a service type of the terminal, where the terminal initiates a data service, or a signaling service; Whether the data service or the signaling service initiated by the network side paging; or whether the terminal initiates a time-tolerable service; or whether the terminal initiates a small data amount service (Small Data); or the terminal group information; or the terminal The established business model information refers to the data communication model information of the service, including one or more combinations of the following features: data interaction periodicity, data interaction frequency, data volume size; or terminal access level (Access Class) Information; or terminal roaming information, refers to whether the terminal is a roaming terminal, or a public land mobile network identifier indicating the terminal subscription, or a HPLMN identifier (Home Public Land Mobile Network, referred to as a local public land mobile network) indicating the terminal P/ or EHPLMN logo (Equivalent Home PLMN, referred to as equivalent local public land shift Dynamic network). Different access network elements can adopt different access policies for the attributes of the terminal. After obtaining the attribute information of the terminal, the target network side can implement admission control according to this, and avoid accessing inappropriate terminals. At the same time, different resource allocation strategies can be adopted accordingly. In this embodiment, the switching signaling is transmitted between the RNCs through the Iur interface. If there is no Iur interface between the RNCs, the RNCs transmit handover signaling through the core network. The foregoing method in this embodiment is also applicable. The third embodiment is based on the network layout of the LTE system. As shown in FIG. 1 , the S1 interface exists between the base station and the core network element MME, and an X2 interface exists between adjacent base stations. In this embodiment, the base station 1 is the source base station, that is, the source network side, and the base station 2 is the target base station, that is, the target network side. The MTC device is in a connected state in the cell under the jurisdiction of the base station 1. The MTC device is a roaming MTC device, and the local public land mobile network HPLMN network identifier is stored in the Universal Subscriber Identity Module (USIM) of the MTC device. Or save the equivalent local public land mobile network EHPLMN identity, the network currently accessed by the MTC device (refers to the network to which the cell under the jurisdiction of the base station 1 belongs, and the PLMN identity of the network to which the system belongs is broadcasted in the system message of the cell) is neither HPLMN , and not EHPLMN, so the MTC device is roaming. The MTC device needs to measure neighboring cells in the base station 1 in order to achieve mobility. After receiving the measurement report that the signal quality of the neighboring cell reported by the MTC device is higher than the signal quality of the serving cell by a predetermined offset, the base station 1 makes a handover decision, and the target cell of the handover is located at the base station 2, and the handover process is as shown in FIG. 6. As shown in the following: Step S601: The source base station sends a handover request (Handover Request) to the target base station. Here, there is an X2 interface between the source base station and the target base station. The handover request includes a quality of service parameter of an E-UTRAN Radio Access Bearer (E-RAB) established by the MTC device, configuration information of the source cell, and the like. In order to implement the present invention, the handover request further includes information indicating the attributes of the MTC device. In this embodiment, the information indicating the attributes of the MTC device is represented by a roaming identifier; or the newly added cell indicates the HPLMN identifier signed by the MTC device; Or the new cell indicates the HPLMN identity and the EHPLMN identity signed by the MTC device. The source base station may obtain the HPLMN and EHPLMN identifiers subscribed to by the MTC device from the core network, or obtain the information reported by the MTC device. Step S602: After receiving the handover request, the target base station performs admission control according to the QoS parameters included in the handover request and the attributes of the MTC device, and performing admission control according to the QoS parameter is to ensure that the MTC device has sufficient resources after accessing the target base station; The attribute implementation admission control of the MTC device ensures that different access network elements can adopt different access policies and adopt different resource allocation policies accordingly. In this embodiment, the base station 2 The connected MME does not allow roaming MTC devices to access due to load restrictions. Therefore, after the base station 2 knows that the MTC device to be handed over is the roaming MTC, it makes a handover decision that the handover is not allowed. The admission control of this handover request failed. Step S603: The target base station sends a handover preparation failure (Handover Preparation Failure) signaling to the source base station, where the failure signaling includes a reason for the terminal that does not allow roaming to access. After receiving the signaling of the handover preparation failure, the source base station needs to find other cells as the candidate cell for handover, and then sends a handover request to the base station to which the other cell belongs. In this embodiment, the attribute information of the terminal is represented by a roaming identifier, or may be type information of the terminal, or group information of the terminal, or priority information of the terminal, or priority information of the service established by the terminal, or a service established by the terminal. Model information, or access level information of the terminal. If the target network side does not allow the corresponding terminal to access, the signaling that fails the handover preparation includes the reason why the terminal of the type is not allowed to access, or the reason for not allowing the terminal of the group to access, or The reason for the terminal access of the predetermined priority, or the reason for the terminal access that does not allow the predetermined service priority, or the reason for the terminal access that does not allow the predetermined service model, or the terminal that does not allow the predetermined access level to be connected The reason for the entry. It should be noted that, in this embodiment, the MTC device is targeted, and the admission control method can be extended to an ordinary terminal, that is, an H2H device. This embodiment takes LTE as an example, and the method can also be extended to a WCDMA system and a GERAN system. This embodiment provides a target network side. FIG. 7 is a structural block diagram of a target network side according to an embodiment of the present invention. As shown in FIG. 7, the handover target network side includes: a receiving module 72 and a control module 74, and below. The foregoing structure is described in detail: the receiving module 72 is configured to receive the handover request signaling sent by the source network side, where the request signaling includes the attribute information of the terminal and the quality of service parameter of the radio access bearer; the control module 74 is connected to The receiving module 72 is configured to perform switching processing according to the attribute information and the quality of service parameter received by the receiving module. Preferably, the attribute information includes one or a combination of the following: type information of the terminal, service type of the terminal, group information of the terminal, priority information of the terminal, priority information of the terminal establishment service, service model information established by the terminal, and terminal Access level information, information about terminal roaming. FIG. 8 is a block diagram of a preferred structure of a target network side according to an embodiment of the present invention. As shown in FIG. 8, the control module 74 includes: a determining submodule 741, a first determining submodule 742, a second determining submodule 743, and a first sending. Sub-module 744 and second transmission sub-module 745. The above structure will be described in detail below: The control module 74 includes: a determining sub-module 741, configured to determine whether to allow the terminal corresponding to the attribute information to perform handover according to one or a combination of the following: an access control requirement or an overload control requirement of the core network to the target network side, and a target network side The load status, operation and maintenance server requirements; the first determining sub-module 742, connected to the determining sub-module 741, is configured to determine that the terminal is allowed to perform when the judgment sub-module 741 determines that the determination result is yes and the service quality parameter requirement is met. The second determination sub-module 743 is connected to the determination sub-module 741, and is configured to determine that the terminal is rejected when the determination result of the first determination sub-module 741 is negative. The control module 74 includes: a first sending submodule 744, connected to the first determining submodule 742, configured to send a handover request acknowledgement signaling to the source network side when the first determining submodule determines that the terminal is allowed to perform handover; The sub-module 745 is connected to the second determining sub-module 743, and is configured to send the handover preparation failure signaling to the source network side when the second determining sub-module 743 determines to reject the handover. FIG. 9 is a structural block diagram of a source network side according to an embodiment of the present invention. As shown in FIG. 9, the source network side includes a transmitting module 92. The foregoing structure is described in detail below. The sending module 92 is configured to send the handover request signaling to the target network side, where the request signaling includes the attribute information of the terminal. 10 is a structural block diagram of an admission control system according to an embodiment of the present invention. The system includes: a source network side 2 and a target network side 4, a source network side 2 structure as shown in FIG. 9, and a target network side 4 structure as shown in FIG. Or 8, as shown in the following, the above structure will be described in detail. With the above preferred embodiment, an admission control method, a target network side, a source network side, and a handover processing system are provided, and the handover request signaling carrying the attribute information of the terminal is received from the source network side by the target network side, and then according to Attribute information and quality of service information are subject to admission control. It overcomes the problem that the network may be overloaded when the terminal performs handover in the related art, reduces the switching load of the network, and improves the stability of the 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. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated 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 spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. An admission control method, comprising:

The target network side receives the handover request signaling sent by the source network side, where the request signaling includes the attribute information of the terminal and the quality of service parameter of the radio access bearer;

The target network side performs admission control according to the attribute information and the quality of service parameter.

2. The method according to claim 1, wherein the attribute information comprises one or a combination of the following: type information of the terminal, a service type of the terminal, group information of the terminal, and priority of the terminal. The information, the priority information of the service established by the terminal, the service model information established by the terminal, the access level information of the terminal, and the information of the terminal roaming.

The method according to claim 1, wherein the receiving, by the target network, the admission control according to the attribute information and the quality of service parameter comprises:

Determining, by the target network side, whether the terminal corresponding to the attribute information is allowed to perform handover according to one or a combination of the following: an access control requirement or an overload control requirement of the core network to the target network side, and a load of the target network side Status, operation, and maintenance of server requirements;

If the result of the determination is yes, and the requirement of the quality of service parameter is met, the target network side determines to allow the terminal to perform handover, otherwise, determines to reject the terminal to perform handover.

The method according to claim 3, wherein, after determining, by the target network side, that the terminal is allowed to perform the handover, the method further includes: the target network side sending a handover request acknowledgement signaling to the source network side;

After the target network side determines to reject the terminal to perform the handover, the method further includes: the target network side sending the handover preparation failure signaling to the source network side.

The method according to claim 4, wherein the handover preparation failure signaling carries a reason for the handover failure, and the reason includes one of the following:

The reason why the terminal of the type information is not allowed to access, the reason why the terminal of the packet information is not allowed to be accessed, the reason why the terminal of the priority information is not allowed to be accessed, and the priority information of the established service is not allowed. The reason for the terminal access is that the terminal accessing the established service model information is not allowed, and the reason for the terminal accessing the access level information is not allowed.

The method according to claim 1 or 4, wherein, in the wideband code division multiple access system (WCDMA), the handover request signaling is relocation request signaling, and the handover preparation failure signaling is a relocation preparation failure. Signaling.

The method according to claim 1, wherein the target network side receives the handover request signaling sent by the source network side, and the target network side receives the handover request signaling sent by the source network side by using a direct interface. Or the target network side receives the handover request signaling sent by the source network side through the core network.

The method according to any one of claims 1 to 5, wherein

In the LTE-LTE system, the source network side is a source base station, and the target network side is a target base station;

In the wideband code division multiple access system, the source network side is a source radio network controller, and the target network side is a target radio network controller;

The terminal includes: a machine type communication device and/or a person to person communication device.

9. A target network side, including:

The receiving module is configured to receive the handover request signaling sent by the source network, where the request signaling includes the attribute information of the terminal and the quality of service parameter of the radio access bearer;

And a control module configured to perform admission control according to the attribute information and the quality of service parameter.

10. The target network side according to claim 9, wherein the attribute information comprises one or a combination of the following.

The type information of the terminal, the service type of the terminal, the grouping information of the terminal, the priority information of the terminal, the priority information of the service established by the terminal, the service model information established by the terminal, the The access level information of the terminal and the information of the terminal roaming.

The target network side according to claim 9, wherein the control module comprises:

The determining sub-module is configured to determine, according to one or a combination of the following, whether to allow the terminal corresponding to the attribute information to perform handover: an access control requirement or an overload control requirement of the core network to the target network side, and the target network side Load status, operation and maintenance server requirements;

a first determining submodule, configured to: when the determining result of the determining submodule is yes, and satisfying the requirement of the quality of service parameter, determining to allow the terminal to perform handover;

The second determining submodule is configured to determine to reject the terminal to perform handover when the determining result of the determining submodule is negative.

12. The target network side according to claim 9, wherein the control module further comprises:

The first sending submodule is configured to send the handover request acknowledgement signaling to the source network side, and the second sending submodule is configured to send the handover preparation failure signaling to the source network side.

A source network side, comprising: a sending module, configured to send a handover request signaling to a target network side, where the request signaling includes attribute information of the terminal.

A handover processing system, comprising: the source network side according to claim 13 and the target network side according to any one of claims 9 to 12.