KR20080078984A - Apparatus and method for location registration of mobile station in multiple heterogeneous communication system - Google Patents
Apparatus and method for location registration of mobile station in multiple heterogeneous communication system Download PDFInfo
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- KR20080078984A KR20080078984A KR20070018930A KR20070018930A KR20080078984A KR 20080078984 A KR20080078984 A KR 20080078984A KR 20070018930 A KR20070018930 A KR 20070018930A KR 20070018930 A KR20070018930 A KR 20070018930A KR 20080078984 A KR20080078984 A KR 20080078984A
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Abstract
Description
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 describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.
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 /
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
The first location registration in
In the second location registration, if the terminal changes the location area within the area (move b-> c) in
The third location registration is performed in
In the fourth location registration, if the terminal completely leaves the area of the PSS (S1) in
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
In
Subsequently, if the current location area state confirmed in
If the PSS region is not changed in the PSS region in
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
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
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
The location
The
The location
Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present 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)
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KR1020070018930A KR101342639B1 (en) | 2007-02-26 | 2007-02-26 | Apparatus and method for location registration of mobile station in multiple heterogeneous communication system |
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KR1020070018930A KR101342639B1 (en) | 2007-02-26 | 2007-02-26 | Apparatus and method for location registration of mobile station in multiple heterogeneous communication system |
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WO2001019116A1 (en) | 1999-09-07 | 2001-03-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Transfer of overlapping routing area control information in a radio access network |
JP4424155B2 (en) | 2004-10-27 | 2010-03-03 | 富士通株式会社 | Mobile communication system, mobile station |
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