KR101342639B1 - Apparatus and method for location registration of mobile station in multiple heterogeneous communication system - Google Patents

Abstract

The present invention relates to an apparatus and method for registering a terminal location in a multiple heterogeneous communication system. A control unit, a system (Pre_Serving_System: PSS) being serviced with reference to the location area information included in the broadcast message, a system overlapping with the PSS (Pre_Overlapping_System: POS), and a system not overlapping with the PSS (Pre_Non-overlapping_System: A location area determination unit for determining a location area state of a POS) and a location area storage unit for buffering the location registration information when the location area of the POS or the PNS is changed. There is an advantage to prevent the waste of power and waste of radio resources.

Multiple heterogeneous communication systems, Location Registration, Global Location Register (GLR).

Description

Terminal location registration device and method in multiple heterogeneous communication systems {APPARATUS AND METHOD FOR LOCATION REGISTRATION OF MOBILE STATION IN MULTIPLE HETEROGENEOUS COMMUNICATION SYSTEM}

1 is a configuration diagram of a multiple heterogeneous communication system according to the present invention;

2 is a view for explaining the location registration of the terminal in a multiple heterogeneous communication system according to an embodiment of the present invention;

3 is a flow chart for location registration of a terminal in a multiple heterogeneous communication system according to an embodiment of the present invention;

4 is an apparatus diagram for location registration of a terminal in a multiple heterogeneous communication system according to an exemplary embodiment of the present invention.

The present invention relates to an apparatus and method for location registration in a mobile communication system, and more particularly, to an apparatus and method for location registration in a multiple heterogeneous communication system.

In the mobile communication system, location registration is a function of informing the terminal of its location to a higher network entity. If the terminal is not registered in the location, all of the locations are located in the higher network entity to find the location of the terminal. After sending a call signal to the base station, and receives the response of the terminal from the base station to determine the location. At this time, if the location registration is made too often, the access channel and the call channel of the base station are overloaded. Accordingly, the terminal should inform its upper network entity of its location to reduce the overload of the access channel and the call channel.

In the prior art, a number of location registration methods for individual communication systems have been proposed. In general, the location registration methods can be largely divided into a static (dynamic) method and a dynamic (dynamic) method. In the static methods, a location area (LA) that can generate a location update by the terminal regardless of the mobility of the terminal is set. That is, the terminal performs a location registration process whenever the location area is changed. The location area usually consists of one or more cells. The dynamic methods may perform the location registration process in any cell depending on the mobility of the terminal. For example, a time-based method, a movement-based method, and a distance-based method may be used. The time-based method updates the location of the terminal every preset period. The motion-based method updates a location every time a terminal passes a cell boundary a predetermined number of times, and the distance-based method performs location registration every time the terminal moves a predetermined distance.

With the development of mobile communication, 2nd, 3rd and 4th generation systems coexist and perform services respectively. However, in the next generation mobile communication system, the terminal may not be provided with a service from one communication system, but may be provided with a plurality of heterogeneous communication systems. That is, in the future, the terminals will be provided with a communication service wherever existing communication systems (2G / 3G network, WLAN, broadband wireless communication network, broadcasting network, etc.) and a new communication system (4G network) naturally interwork.

Since the development direction of the communication system has been focused on the expansion of capacity and coverage of a single communication system, an efficient location registration mechanism is required when multiple heterogeneous communication systems are interworked. When the terminal performs location registration for a single communication system as in the prior art, a lot of overhead will occur when location registration in an environment in which multiple communication systems are interworked. In other words, if the terminal updates the location information independently for each communication network, power consumption and a lot of signaling overhead of the terminal may occur, which may cause a decrease in system performance.

Accordingly, there is a need for an apparatus and method for location registration of a terminal in a multiple heterogeneous communication network.

Accordingly, an object of the present invention is to provide an apparatus and method for location registration in multiple heterogeneous communication systems.

Another object of the present invention is to provide an apparatus and method for reducing power consumption and signaling overhead for location registration in multiple heterogeneous communication systems.

According to a first aspect of the present invention for achieving the above object, a location registration apparatus of a terminal in a multiple heterogeneous communication system, comprising: a control unit for receiving a broadcast message including respective location area information from multiple heterogeneous communication systems; , A system being serviced with reference to the location area information included in the broadcast message (Pre_Serving_System: PSS), a system overlapping with the PSS (Pre_Overlapping_System: POS), and a system not overlapping with the PSS (Pre_Non-overlapping_System: POS) And a location area determining unit for determining a location area state of the location area and a location area storage unit for buffering the location registration information when the location area of the POS or the PNS is changed.

According to a second aspect of the present invention for achieving the above objects, a method for registering a location of a terminal in a multiple heterogeneous communication system, the method comprising: receiving a broadcast message including respective location area information from multiple heterogeneous communication systems; , A system being serviced with reference to the location area information included in the broadcast message (Pre_Serving_System: PSS), a system overlapping with the PSS (Pre_Overlapping_System: POS), and a system not overlapping with the PSS (Pre_Non-overlapping_System: POS) And determining a location area state of the buffer and buffering the location registration information without registering a location when the location area of the POS or the PNS is changed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, an apparatus and method for reducing power waste and signaling overhead for location registration in a multiple heterogeneous communication system will be described.

In order to facilitate understanding of the following description, some assumptions will be made. First, the entire service network consists of N multiple heterogeneous communication systems interworking. For example, as shown in FIG. 1, the network structure of the next generation mobile communication system may be represented. In FIG. 1, existing communication systems (2G / 3G 140 network, WLAN 110, broadband wireless communication network 120, broadcasting network 150, etc.) and a new communication system (4G 130 network) are interworked. It constitutes an entire network. Second, the terminal 100 may receive a communication service from several heterogeneous communication systems. That is, the terminal 100 supports a multimode interface. Third, the entire network overlaps with each other in the area of separate communication systems as in FIG. Fourth, there is an entity that performs terminal location management in a backbone network (for example, the Internet network). Herein, the entity will be referred to as a global location register (GLR). That is, the GLR manages which location in which communication system area the terminal is. Therefore, when traffic is generated to the terminal 100, the system requests the GLR for location information of the terminal to perform a paging procedure.

2 is a view for explaining the location registration of the terminal in a multiple heterogeneous communication system according to an embodiment of the present invention.

Referring to FIG. 2, four situations in which the terminal should perform location registration in three heterogeneous communication systems S1, S2, and S3 will be described. First, some terms will be defined to help understand the description. The PSS (Pre_Serving_System) refers to a communication system that received a communication service immediately before the terminal transitions to an idle mode. In FIG. 2, it is assumed that the PSS is S1. POS (Pre_Overlapping_System) refers to a communication system overlapped with the PSS at the time when the terminal transitions to the idle mode. Here, the POS is S3. The POS may be one or more systems, depending on the degree of overlap. The PNS (Pre_Non-overlapping_System) refers to a communication system that does not overlap the PSS at the time when the UE transitions to the idle mode. Here, the PNS becomes S2, and the terminal does not receive any signaling from the PNS. And, it is assumed that the location area of each communication network is composed of one cell.

First, when the terminal changes the location area in the area of the communication system that received the communication service immediately before the transition to the idle mode in step 200, the terminal location registration, second, the terminal transitions to the idle mode in step 202 If the location area is changed in the communication system area where the service is not provided, but the service location is changed immediately before the terminal, thirdly, in the communication system area where the communication service cannot be provided immediately before the terminal transitions to the idle mode in step 204. Terminal location registration when entering or changing the location area. Fourth, terminal location registration when the terminal leaves the communication system area that received the communication service immediately before transitioning to the idle mode in step 206.

The first location registration in step 200 updates the location information according to the existing location registration procedure according to the individual communication network. For example, assuming S1 is PSS and S3 is POS, when the terminal moves from point a to point b, the terminal registers the location according to the existing location registration procedure. The terminal updates the location information in a predetermined manner in a broadband wireless communication network (assuming that the S1 region is a broadband wireless communication network). The location information transmitted by the terminal is transmitted to the GLR so that the location of the terminal is managed.

In the second location registration, if the terminal changes the location area within the area (move b-> c) in step 202, the terminal does not update the location information and buffers the location information message to delay transmission. When the terminal continuously changes the location area within the corresponding area, the terminal always buffers only the latest location information and deletes the previously buffered location information. In order to update the location of the terminal, as in the first case (step 200), when the UE attempts to transmit a location information message when there is a change in the location area in the PSS (S1), the UE sends a location information message of the buffered POS (S3). Add to send to GLR.

The third location registration is performed in step 204 when the terminal enters the area of the PNS (S2) or when the location area within the area is changed (move c-> d). Delay the transmission by buffering without registering the location information of the terminal. When the terminal continuously changes the location area within the corresponding area, the terminal always buffers only the latest location information and deletes the previously buffered location information. When the first case (step 200) occurs, when the location information in the PSS (S1) is updated, the location information message of the PNS (S2) is also added and transmitted to the GLR.

In the fourth location registration, if the terminal completely leaves the area of the PSS (S1) in step 206 and enters the area S2 managed by the new communication system (move d-> e), the location information must be newly registered. . In this case, as soon as the terminal leaves the area of the PSS (S1), the terminal may also enter the areas S2 and S3 managed by two or more communication systems. In this case, the terminal should determine a system for updating the location information. . Such a decision can be determined by the operator by setting the priority in advance.

3 is a flowchart illustrating a location registration of a terminal in a multiple heterogeneous communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the terminal receives a broadcast message from each heterogeneous communication system in step 300 to receive location region information of the terminal. Here, each heterogeneous communication system periodically transmits system information required by the terminal through the broadcast message. For example, the terminal receives broadcast messages from communication systems in areas S1 and S3 at points a, b, and c of FIG. 2, respectively, and receives location information of the corresponding areas S1, S3. At the point d, the broadcast message is received from the communication systems in the areas S1, S2, and S3 to receive the location information of the corresponding areas S1, S2, and S3. Finally, at point e, broadcast messages are received from communication systems in regions S2 and S3, respectively, to receive location information of the corresponding regions S2 and S3.

In step 302, the terminal checks the current location area state with reference to the location area information included in the broadcast message. For example, when the terminal receives the location information of the corresponding system from each point (a to e) of FIG. 2 and moves from point a to point b, only the PSS location area S1 may be changed. . It can be seen that when moving from point b to point c, the PSS location area S1 and POS location area S2 have been changed, and when moving from point c to point d, the PSS location area S1 and POS location area S2 Is changed and a new location area S2 has been added. Finally, when moving from the point d to the point e, it can be seen that the deviation from the PSS location area S1 and the PNS location area S2 has been changed.

 Subsequently, if the current location area state confirmed in step 304 is a PSS location area change (for example, the location registration situation in the first case in FIG. 2), the terminal proceeds to step 312 in each of the preset heterogeneous communication systems. The location information is transmitted to the GLR according to the location registration procedure. For example, when the terminal moves from point a to point b, the terminal notifies the GLR that the S1 location region has been immediately changed according to the location registration procedure of the communication system of the S1 region.

If the PSS region is not changed in the PSS region in step 304, the terminal proceeds to step 306 to determine whether the POS position region or the PNS position region should be changed. If it is necessary to change the POS location area or the PNS location area (for example, the location registration situation of the second or third case in FIG. 2), the terminal proceeds to step 314 and the POS or PNS location area. The location information is buffered in the memory without transmitting the information to the GLR. Thereafter, when the PSS location registration event occurs in step 304, the terminal updates the location registration by transmitting information of the POS or PNS location area stored in a memory to the GLR. If the PSS location registration event does not occur in step 304, the steps 306 and 314 are repeated to buffer the latest location registration information in a memory and do not transmit the location information to the GLR. For example, when the terminal moves from point b to point c, the S1 region and the S3 position region are changed. When the position region of S3 is changed, the changed position information is buffered without transmitting to the GLR. S3 location region change information is transmitted to the GLR. Similarly, when the terminal moves from point c to point d, the area S1 and the area S3 are changed and the area S2 is newly added. When the terminal S1 location area is changed while buffering the information of the location S3 and the area S2, the area S1 and S2 are changed. , S3 location area information is transmitted to GLR at the same time.

If the POS location area or the PNS location area is not changed in step 306 (for example, the location registration situation in the fourth case in FIG. 2), the terminal proceeds to step 308, where the terminal moves to the PSS location. Make sure you have left the area. If the terminal leaves the PSS location area, the terminal proceeds to step 310 and attempts to register a location in the corresponding area to enter the network. For example, the terminal attempts to enter a network into the S2 region or the S3 region because the terminal has left the S1 region at point e of FIG. 2. Here, if the entered area is S2, the PSS area becomes the S2 area. On the other hand, if the terminal does not leave the PSS location area, the process proceeds to step 300.

Thereafter, the terminal updates the location registration by transmitting the latest location registration information buffered in step 312 to the GLR.

Thereafter, the terminal terminates the algorithm of the present invention.

4 is a diagram illustrating an apparatus for location registration of a terminal in a multiple heterogeneous communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the location registration apparatus diagram includes a first transceiver 400_1, a second transceiver 400_2, an nth transceiver 400_n, a controller 402, a location region determination unit 404, and a location. And a registration unit 406 and a location area storage unit 408.

The first transceiver 400_1, the second transceiver 400_2, and the nth transceiver 400_n may transmit and receive data with a multiple heterogeneous communication system through corresponding modulation / demodulation and corresponding encoding / decoding. For example, the first transceiver 400_1 may access a wideband wireless communication network, the second transceiver 400_2 may communicate with a code division multiple access (CDMA) network, and the nth transceiver 400_n may access the WLAN.

The controller 402 controls the first transceiver 400_1, the second transceiver 400_2, and the nth transceiver 400_n to transmit location information of the corresponding system to the GLR or to broadcast multiple heterogeneous communication networks. The message is received and output to the location area determination unit 404.

The location area determination unit 404 periodically receives a broadcast message from each of the heterogeneous systems, and then determines the location area state of the terminal by referring to the location area information included in the broadcast message. For example, is the terminal moved within the PSS when moving (first case in FIG. 2), whether it is in an overlapped area by moving to POS (second case in FIG. 2), or moved to PNS (FIG. 2) In the third case), it is known whether the PSS region is out of the case (fourth case in FIG. 2).

The location registration unit 406 receives the location area determination information from the location area determination unit 404 and transmits the location information stored in the location area storage unit 408 to the GLR. For example, when a PSS location registration event occurs, the location information stored in the location area storage unit 408 is transmitted to the GLR. When the event does not occur, location information is transmitted to the location area storage unit ( 408).

 The location area storage unit 408 stores the latest location information according to the location area determination information from the location area determination unit 404. For example, when the terminal moves to the POS area and the PNS area, location information is not transmitted to the GLR, but is stored in the location area storage unit 408.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, by performing the location registration of the terminal in multiple heterogeneous communication systems, there is an advantage to prevent the waste of power and radio resources that can occur when updating the location information for the individual network.

Claims (14)

A location registration device of a terminal in a multiple heterogeneous communication system, A control unit for receiving a broadcast message including each location area information from multiple heterogeneous communication systems; Of a system (Pre_Serving_System: PSS), a system overlapping with the PSS (Pre_Overlapping_System: POS), and a system not overlapping with the PSS (Pre_Non-overlapping_System: PNS) with reference to the location area information included in the broadcast message. A location area determination unit for determining a location area status; And a location area storage unit for buffering the location registration information when the location area of the POS or the PNS is changed. The method of claim 1, The location registration unit for transmitting the location registration information for the buffered POS or the PNS location area change to the Global Location Register (GLR) together with the location registration information for the PSS location area change when the PSS location change occurs. Apparatus comprising a. 3. The method of claim 2, The location registration unit And entering the PNS or the POS area when leaving the PSS location area. The method of claim 3, The location registration unit The apparatus characterized in that for transmitting the location registration information on the change of the location area of the corresponding area when entering the network to the GLR. The method of claim 1, Wherein the PSS area is a service area of a communication system that was receiving service immediately before the terminal transitioned to an idle mode. The method of claim 1, And the POS area is a service area of a communication system overlapped with the PSS at the time when the terminal transitions to the idle mode. The method of claim 1, And the PNS area is a service area of a communication system that does not overlap with the PSS at the time when the terminal transitions to the idle mode. In the location registration method of the terminal in a multiple heterogeneous communication system, Receiving a broadcast message including each location region information from multiple heterogeneous communication systems; Of a system (Pre_Serving_System: PSS), a system overlapping with the PSS (Pre_Overlapping_System: POS), and a system not overlapping with the PSS (Pre_Non-overlapping_System: PNS) with reference to the location area information included in the broadcast message. Determining the state of the location area; And buffering the location registration information without registering the location when the location area of the POS or the PNS is changed. 9. The method of claim 8, Transmitting the buffered location registration information for the POS or the PNS location area change to the Global Location Register (GLR) together with the location registration information for the PSS location area change when the PSS location change occurs. Characterized in that. 9. The method of claim 8, And entering the PNS or the POS area when leaving the PSS location area. The method of claim 10, And transmitting location registration information on the change of the location area of the corresponding area to the GLR when entering the network. 9. The method of claim 8, Wherein the PSS area is a service area of a communication system that was receiving a service immediately before the terminal transitioned to an idle mode. 9. The method of claim 8, And the POS area is a service area of a communication system overlapped with the PSS at the time when the terminal transitions to the idle mode. 9. The method of claim 8, And the PNS area is a service area of a communication system that does not overlap with the PSS at the time when the terminal transitions to the idle mode.

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