KR20090049786A - Method and system for handover using a service masuringment management - Google Patents

Abstract

The present invention relates to a method and system for determining handover through service measurement management.

According to the present invention, in an environment in which different networks, that is, heterogeneous networks, are distributed in one geographic area, a mobile terminal supporting a plurality of interfaces provides service measurement information of a user application, thereby requiring unnecessary handover of a user. Can be prevented.

Handover, service measurement report, service measurement control, reporting criteria information

Description

Method and system for handover determination using a service masuringment management

The present invention relates to a method and system for determining handover through service measurement management.

The present invention is derived from the research conducted as part of the IT growth engine technology development project of the Ministry of Information and Communication and the Ministry of Information and Communication Research and Development. [Task Management No .: 2006-S-003-02, Project Name: Development of Next Generation Mobile Communication Service Platform] .

A wireless access system in a mobile communication network controls various information measured by a mobile terminal for managing radio resources, and manages measurement reports sent by the mobile terminal to determine whether to handover. In this case, various types of information measured by the mobile terminal may include intra frequency information, inter frequency information, inter radio access technology (RAT) information, traffic volume information, and movement. UE internal information and UE positioning information.

Among these pieces of information, intra frequency information, inter frequency information, and inter radio access technology information are measurement information on downlink physical channels of the same frequency, different frequencies, or radio access technologies, respectively. The traffic amount information is uplink traffic amount measurement information including buffer occupancy information, and the mobile terminal internal information is mobile terminal transmission power and received signal information. In addition, the mobile terminal position information is information obtained by measuring the position of the current mobile terminal.

According to the conventional radio resource measurement management technology, the radio access system determines whether to handover by reporting the received signal quality of the mobile terminal. That is, the handover is determined based on simply the received signal quality without considering various characteristics of service quality or user preference.

In such a case, when the active application is terminated or some services requiring low quality of service, an unnecessary handover occurs that the user does not want even though the quality of service is sufficiently satisfied even in the current wireless connection. In addition, even if a user starts a new application and a higher quality of service is required or the user's preference requirements are changed, a problem occurs that is not reflected in the handover decision.

Accordingly, the present invention provides a method and system for determining handover for supporting user-centered handover using a mobile terminal supporting a plurality of interfaces located in different heterogeneous networks.

The handover determination method which is a feature of the present invention for achieving the technical problem of the present invention, in the method for determining the handover of the mobile terminal,

Receiving a service measurement report from the mobile terminal; Determining whether the service corresponding to the quality request information can be provided to the mobile terminal based on the quality request information of the active service included in the service measurement report; And if it is determined that the service is not provided to the mobile terminal, determining a handover of the mobile terminal.

Another aspect of the present invention for achieving the technical problem of the present invention is a handover determination method, in the method for determining the handover of the mobile terminal,

Receiving a service measurement report from the mobile terminal; On the basis of the service cost priority and radio access technology priority information included in the service measurement report, it is determined whether the service can be provided to the mobile terminal using the service cost and radio access technology preferred by the mobile terminal. Making; If it is possible to provide a service to the mobile terminal, determining whether the received signal strength received from the mobile terminal is stronger than a preset strength; And if the received signal strength is not stronger than the preset strength, determining a handover of the mobile terminal.

According to the present invention, in an environment in which different networks, that is, heterogeneous networks, are distributed in one geographic area in a variety of ways, a mobile terminal supporting a plurality of interfaces provides service measurement information of a user application, which is unnecessary for a user. The occurrence of handover can be prevented.

In addition, the user-centered handover may be supported by reflecting the handover requirements of various users.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, the terms “… unit”, “… unit”, “module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. have.

In this specification, a mobile station (MS) is a terminal, a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment (User Equipment). It may also refer to a user equipment (UE), an access terminal (AT), and the like, and may include all or some functions of a mobile terminal, a subscriber station, a portable subscriber station, a user device, and the like.

In the present specification, a base station (BS) is an access point (AP), a radio access station (Radio Access Station, RAS), a Node B (Node B), a base transceiver station (Base Transceiver Station, BTS), MMR ( Mobile Multihop Relay) -BS and the like, and may include all or part of functions such as an access point, a radio access station, a Node B, a base transceiver station, and an MMR-BS.

Now, a service measurement management method and apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary diagram of a network environment according to an embodiment of the present invention.

As shown in FIG. 1, it is assumed that different networks are variously distributed in one geographic area, and a user terminal also supports a plurality of radio access technology interfaces.

In other words, the network environment according to the embodiment of the present invention is a radio access technology (hereinafter referred to as a radio access technology (RAT)), a first radio access system 200 for providing RAT 1 and a second radio access for providing RAT 2. System 200'is distributed in one geographic area. In this way, the mobile terminal 100 supporting both the interfaces of RAT 1 and RAT 2 is located in a mixed geographic region, and the first wireless access system 200 or the second wireless access system 200 'is located. Receive service.

The structure of the mobile terminal 100 and the wireless access system 200 managing the measurement of the service provided to the mobile terminal 100 in such a network environment will be described in detail with reference to FIGS. 2 and 3.

2 is a structural diagram of a mobile terminal according to an embodiment of the present invention.

As shown in FIG. 2, the mobile terminal 100 according to an embodiment of the present invention includes an application monitoring unit 110, a service cost priority management unit 120, a RAT priority management unit 130, and a service measurement control information management unit. 140.

The service measurement control information management unit 140 receives and manages service measurement target information and reporting reference information included in the service measurement control signal received from the wireless access system 200. In addition, active service descriptor information, service cost priority information, and RAT priority information included in the service measurement target information are collected.

The active service description information, service cost priority information, and RAT priority information are information generated from the application monitoring unit 110, the service cost priority management unit 120, and the RAT priority management unit 130, respectively. In addition, when the reporting criteria of the service measurement is satisfied based on the reporting criteria information included in the service measurement control signal received from the wireless access system 200, the wireless access system 200 includes one or more of the collected information. Send a service measurement report.

The application monitoring unit 110 monitors active applications running in the mobile terminal 100, and provides service peak rate, sustainable rate, and maximum burst size information for the active active service. Manage active service technology information, including. In addition, when the service measurement control information manager 140 requests the quality requirement of the active service, the service measurement control information manager 140 transmits the active service description information.

The service cost priority management unit 120 manages the priority of the service cost preferred by the user, and transfers the corresponding information when the service measurement control information management unit 140 requests the service cost priority information. In this case, the service cost priority may be directly input by the user or collected from the service charge profile of the user. An example of the priority of the service cost may be indicated as a bronze fee, a silver fee, or a gold fee if the user prefers to be provided with a low RAT. It is not limited.

The RAT priority management unit 130 manages the priority of a user's preferred RAT with respect to various RATs supported by the mobile terminal 100, and when the service measurement control information management unit 140 requests the priority information of the RAT, Communicate information Here, the priority of the RAT may be directly input by the user or may be collected from preferred RAT information of the running application.

Next, a structure of a wireless access system that is wirelessly connected to the mobile terminal described with reference to FIG. 2 and provides a service to the mobile terminal will be described with reference to FIG. 3.

3 is a structural diagram of a wireless access system according to an embodiment of the present invention.

As shown in FIG. 3, the wireless access system 200 according to the embodiment of the present invention includes a service measurement control unit 210, a service measurement report management unit 220, a wireless connection state management unit 230, and a RAT capability management unit 240. ) And the handover decision unit 250.

When the service measurement control unit 210 receives a wireless connection completion signal indicating that the wireless connection with the mobile terminal 100 is completed from the wireless connection state management unit 230, the service measurement target information and the report reference information are transmitted to the mobile terminal 100. Sends a service measurement control signal comprising a. Here, the service measurement target information includes one or more pieces of information of quality requirement information, service cost priority information, and RAT priority information of an active active service.

In this case, the RAT priority information is generated by the RAT capability manager 240 and is included when the mobile terminal 100 connected to the wireless access system 200 has a plurality of RAT capabilities. In addition, the reporting criteria information is any of the case that the quality requirements of the active service being provided to the mobile terminal 100 is changed to a specific threshold or more, the service cost priority is changed, the RAT priority is changed Information that causes the mobile terminal 100 to generate a service measurement report when one case occurs.

The service measurement report management unit 220 receives a service measurement report transmitted by the mobile terminal 100 and manages report information included in the service measurement report. In addition, the active service description information, service cost priority information, and RAT priority information included in the report information are transmitted to the handover determination unit 250.

The wireless connection state manager 230 manages a wireless connection state between the wireless access system 200 and the mobile terminal 100. When the wireless connection of the mobile terminal 100 is completed, the service measurement control manager 140 of the mobile terminal 100 notifies the completion of the wireless connection to perform the service measurement control.

The RAT capability manager 240 manages whether the mobile terminal 100 supports a plurality of RATs with respect to the mobile terminal 100 in which the wireless connection with the wireless access system 200 is completed. If the mobile terminal 100 supports a plurality of RATs, the RAT priority information is requested to the service measurement control manager 140 of the mobile terminal 100 so as to measure the RAT priority. The RAT capability of the mobile terminal 100 may be received from the mobile terminal 100 or collected from subscription information of the mobile terminal 100 when the mobile terminal 100 performs a wireless connection to the wireless access system 200. have.

The handover decision unit 250 determines whether the mobile terminal 100 is handed over based on any one of active service description information, service cost priority information, or RAT priority information received from the service measurement report management unit 220. Determine. In addition, the handover determination unit 250 selects a wireless access system suitable for the mobile terminal 100 is determined handover.

A method of managing service measurement through the mobile terminal 100 and the wireless access system 200 described above will be described with reference to FIG. 4.

4 is a flowchart illustrating a service measurement management method according to an embodiment of the present invention.

As shown in FIG. 4, when a wireless connection between the mobile terminal 100 and the wireless access system 200 is performed (S100), the wireless access system 200 transmits a service measurement control signal to the mobile terminal 100. (S110). At this time, the service measurement control signal includes a service measurement target and reporting reference information.

The service measurement target includes at least one of quality requirement information, service cost priority information, and RAT priority information of an active service running in the mobile terminal 100. The reporting criterion information is a criterion for the mobile terminal 100 to report a service measurement report to the wireless access system 200. For reporting criteria, if the quality requirements of the active service change above a certain threshold, the service cost priority may change, or the RAT priority may change, and either of these cases may occur. The mobile terminal 100 reports to the wireless access system 200.

When the mobile terminal 100 receives the service measurement control signal, the mobile terminal 100 checks the service measurement target and the report reference information included in the service measurement control signal to determine whether the measurement report criteria are satisfied (S120). If the reporting criteria is satisfied, the service measurement report is transmitted to the wireless access system 200 (S130).

In this case, the service measurement report refers to a report of a service measurement target that satisfies the service measurement reporting criteria, and includes one or more of active service description information, service cost priority information, and priority information of the RAT. However, if the reporting criteria are not satisfied, the mobile terminal 100 is continuously provided with the service from the wireless access system 200 in the form of being provided with the service (S140).

Next, a handover procedure performed in a wireless access system will be described with reference to FIG. 5.

5 is a flowchart of a handover procedure performed based on a quality request of an active service in a wireless access system according to an embodiment of the present invention.

As shown in FIG. 5, the wireless access system 200 currently connected to the mobile terminal 100 receives a service measurement report from the mobile terminal 100 (S200). Thereafter, the handover decision unit 250 determines whether the service can be provided according to the quality requirements of the active service included in the received service measurement report (S210).

If the wireless access system 200 can provide the service according to the quality requirements of the active service, the handover determination unit 250 determines whether the received signal strength of the mobile terminal 100 is good (S220). ).

As a result of the determination in step S220, if the signal strength received from the mobile terminal 100 is not good, a handover to the mobile terminal 100 is determined (S230). Thereafter, the mobile terminal 100 is instructed to perform a handover, or a good neighbor radio access system is informed that the mobile terminal 100 is a handover target terminal.

However, if the wireless access system 200 does not provide the service according to the quality requirements of the active service, the handover is determined regardless of the received signal strength of the mobile terminal 100 (S230). In this case, the handover may inform the mobile terminal 100 to simply perform the handover. Alternatively, the mobile terminal 100 may direct handover of the mobile terminal 100 to another wireless access system around the wireless access system 200 capable of providing a service according to the quality requirement of the corresponding active service. . These methods are already known, and detailed descriptions thereof will be omitted in the embodiments of the present invention.

As such, according to an embodiment of the present invention, a handover occurs when a user starts a new application and requests a higher quality of service. In addition, when the active service running in the mobile terminal is terminated or the active service requiring low quality of service is running, even if the signal strength received from the adjacent radio access system is stronger, the service can be provided in the current radio access system. If there is, do not perform unnecessary handover.

Next, another method of determining the handover for the mobile terminal 100 by the wireless access system 200 will be described with reference to FIG. 6. Here, when the radio access system 200 determines the handover for the mobile terminal 100, the handover is determined using the RAT preference information.

6 is a flowchart of a handover procedure performed based on a radio access technology preference in a radio access system according to an embodiment of the present invention.

As shown in FIG. 6, when the service measurement report is received from the mobile terminal 100 (S300), the mobile terminal 100 is currently connected to the wireless access system 200 based on the RAT preference information included in the received service measurement report. It is determined whether or not to prefer a RAT different from the RAT provided by S310. If the mobile terminal 100 does not prefer other RATs, the handover decision unit 250 determines whether the received signal strength of the mobile terminal 100 is good (S320).

If it is determined in step S320 that the signal strength received from the mobile terminal 100 is not good, the handover to the mobile terminal 100 is determined (S330). Thereafter, the mobile terminal 100 is instructed to perform a handover or the adjacent radio access system having a good reception signal is informed that the mobile terminal 100 is a handover target terminal.

Similarly, when the mobile terminal 100 prefers another RAT in step S310, handover for the mobile terminal 100 in step S330 described above is determined. Herein, a method of instructing handover to the mobile terminal 100 or informing the handover of the mobile terminal 100 to an adjacent wireless access system is also known. Therefore, a detailed description thereof will be omitted.

The embodiments of the present invention described above are not implemented only through the apparatus and the method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. Implementation may be easily implemented by those skilled in the art from the description of the above-described embodiments.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is an exemplary diagram of a network environment according to an embodiment of the present invention.

2 is a structural diagram of a mobile terminal according to an embodiment of the present invention.

3 is a structural diagram of a wireless access system according to an embodiment of the present invention.

4 is a flowchart illustrating a service measurement management method according to an embodiment of the present invention.

5 is a flowchart of a handover procedure performed based on a quality request of an active service in a wireless access system according to an embodiment of the present invention.

6 is a flowchart of a handover procedure performed based on a radio access technology preference in a radio access system according to an embodiment of the present invention.

Claims (9)

In the method for determining the handover of the mobile terminal, Receiving a service measurement report from the mobile terminal; Determining whether the service corresponding to the quality request information can be provided to the mobile terminal based on the quality request information of the active service included in the service measurement report; And If it is determined that the service is not provided to the mobile terminal, determining a handover of the mobile terminal Handover decision method comprising a. The method of claim 1, If it is determined that a service can be provided to the mobile terminal, determining whether the received signal strength received from the mobile terminal is stronger than a preset strength; And Determining a handover of the mobile terminal if the received signal is not stronger than the preset strength Handover decision method comprising a. In the method for determining the handover of the mobile terminal, Receiving a service measurement report from the mobile terminal; On the basis of the service cost priority and radio access technology priority information included in the service measurement report, it is determined whether the service can be provided to the mobile terminal using the service cost and radio access technology preferred by the mobile terminal. Making; If it is possible to provide a service to the mobile terminal, determining whether the received signal strength received from the mobile terminal is stronger than a preset strength; And If the received signal strength is not stronger than the preset strength, determining a handover of the mobile terminal Handover decision method comprising a. In accordance with claim 3, If it is determined that the service cannot be provided to the mobile terminal, Determining a handover of the mobile terminal Handover decision method comprising a. The method according to claim 1 or 3, Prior to receiving the service measurement report, Performing a wireless connection with the mobile terminal; Transmitting a service measurement control signal to the mobile terminal, wherein the service measurement control signal includes service measurement target and reporting reference information; And Receiving a service measurement report from the mobile terminal, wherein the mobile terminal is a mobile terminal that satisfies a service measurement reporting criterion according to the reporting criterion information; Handover determination method further comprising. The method of claim 5, The service measurement report, And at least one of quality requirement information, service cost priority information, and radio access technology priority information of an active service running in the mobile terminal. The method of claim 5, The service measurement target, And at least one of quality requirement information, service cost priority information, and radio access technology priority information of an active service running in the mobile terminal. The method of claim 5, The reporting criteria information, The service measurement report is transmitted when the quality requirement of the active service running in the mobile terminal is changed, when the service cost priority is changed or when the radio access technology priority is changed. How to determine handover. The method according to any one of claims 1 to 8, The handover is a handover between heterogeneous networks, and the mobile terminal supports all interfaces of the heterogeneous network.

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