KR20050050798A - Method and apparatus for timer-based location management using mobile station state information in packet-based mobile communication system - Google Patents

Abstract

The present invention relates to a timer-based location management method and apparatus using mobile terminal state information in a packet-based mobile communication system.

In the present invention, if the state of the mobile terminal is in a READY state in which packet data is being transmitted or has a high probability of being transmitted, the elapsed time from the point of time when the mobile terminal is most recently registered by applying a registration timer threshold having a small value If this registration timer threshold is exceeded, a location update is made. If the state of the mobile terminal is a STANDBY state in which packet data is not transmitted or has a low probability of being transmitted, a registration timer threshold having a large value is applied. If the elapsed time exceeds the registration timer threshold from the latest time of location registration for each mobile terminal, the location update is performed.

Through this, paging costs can be reduced through accurate packet data transfer due to frequent location updates for mobile terminals in a ready state, and overall costs can be reduced due to location update costs for mobile terminals in standby state.

Description

METHOD AND APPARATUS FOR TIMER-BASED LOCATION MANAGEMENT USING MOBILE STATION STATE INFORMATION IN PACKET-BASED MOBILE COMMUNICATION SYSTEM}

The present invention relates to a timer-based location management method and apparatus therefor using mobile terminal status information, and more particularly, to a method for managing location using mobile terminal status information in a packet-based mobile communication system and the same. Relates to a device.

In general, the timer-based location management scheme is easier to implement than the zone-based location management scheme commonly used in mobile communication systems, and has the advantage of distributing the signal load in the mobile network. It is known to have.

The area-based location management scheme, which is mainly used in the current mobile communication system, reports the location to the mobile network whenever a terminal moves to a location area consisting of a plurality of cells. The register location register stores it. The home location register then stores the location of the visitor location register.

On the other hand, the visitor location register that manages the area where the mobile terminal was previously located deletes the location information of the mobile terminal. This location update occurs each time the mobile terminal moves to a new area, i.e., the visitor location register and home location register of the new area perform the registration process and the visitor location register of the previous area each time.

In this area-based location registration, existing second generation mobile communication systems such as Global System for Mobile Communication (GSM) or Interim Standard 41 (IS-41) store the location of the mobile terminal by location area, General Packet Radio Service (GPRS), a 2.5G mobile communication system proposed for communication, performs location update based on a cell or a routing area (RA) according to a traffic state of a mobile terminal.

That is, when the mobile terminal is sending or sending a packet, the mobile terminal is ready and performs a location registration every time the cell is changed. When the mobile terminal waits due to the low probability of sending a packet, When updating the RA defined by a plurality of cells in a standby state, the location update is performed.

UMTS (Universal Mobile Telecommunication System), a third generation mobile communication system, is further subdivided based on cell, URA {UMTS Terrestrial Radio Access Network (UTRAN) Registration Area, `` URA ''} and RA according to the state of the mobile terminal. The specified location update.

Recently, a system in which a paging function is added to Mobile IP, which is being actively researched to implement a high speed portable Internet, is based on an active and a dormant state. Perform location management based on paging area.

As such, the location management scheme in the packet-based mobile communication system updates the location based on the subdivided areas such as cell, URA, and RA according to the state of the mobile terminal instead of the single location area used in the second generation circuit-based mobile communication system. Perform.

Compared to the area-based location management technique mentioned above, the mobile terminal in the timer-based location management technique, which is known to be easy to implement and has the advantage of distributing the signal load in the mobile network, performs the most recent location update. If the elapsed time (or time) is checked from one point in time and the time exceeds the predefined registration timer threshold value, the location update is performed.

In addition, if an incoming call and an outgoing call occur in the mobile terminal during the movement of the mobile terminal, the location update of the mobile terminal is implicitly generated in the cell, and the next location update has elapsed. It will be generated again in the cell where the mobile terminal is located when the time exceeds the registration timer threshold at this location update time.

However, the above method is a location management scheme based on a single-value registration timer threshold regardless of the state of the mobile terminal, and is suitable for a circuit-based mobile communication system. That is, in a packet-based mobile communication system having a plurality of states according to the traffic state of the mobile terminal is inefficient.

The reason is that it is efficient in terms of cost and management to reduce the paging as much as possible when the packet is delivered to the mobile terminal by frequently updating the location of the mobile terminal when the packet is being transmitted or is likely to be transmitted to the mobile terminal. to be.

On the other hand, if the mobile terminal has a low probability of delivering a packet to another mobile terminal, it is more efficient to suppress the location update and thereby reduce the cost.

Therefore, the conventional method of managing the position of the mobile terminal using a single value registration timer threshold regardless of the state of the mobile terminal may be inefficient.

The technical problem to be solved by the present invention is to solve such a problem, and to accurately transmit and receive packet data by applying a small registration timer threshold to a mobile terminal in a ready state where a packet is being transmitted or has a high probability of being transmitted. Disclosed is a timer-based location management method and apparatus using mobile terminal state information in a packet-based mobile communication system.

In addition, the present invention provides a packet-based mobile communication that can reduce the cost due to location update by terminal by applying a highly calculated registration timer threshold for a standby mobile station that is not transmitting a packet or a low probability of being transmitted. Disclosed is a timer-based location management method using a mobile terminal state information in a system and an apparatus thereof.

Timer-based location management method using the state information for each mobile terminal in a packet-based mobile communication system according to a feature of the present invention for achieving this object includes a Serving GPRS Support Node (SGSN) for delivering packet data to the mobile terminal A location management method using state information for each mobile terminal in a packet-based mobile communication system, comprising: a) if the state of the mobile terminal is in a ready state in which packet data is being transmitted or has a high probability of being transmitted, Applying a registration timer threshold to a registration timer threshold of the mobile terminal; b) paging all cells within a distance from which the mobile terminal can move for a predetermined time centering on a cell whose location has been recently updated by the mobile terminal and delivering packet data to the mobile terminal; c) performing a location update of the mobile terminal if the elapsed time counted from the time of the latest location update by the mobile terminal is greater than the applied registration timer threshold; And d) dividing a state of the mobile terminal into a standby state in which packet data is not transmitted or a low probability of being transmitted, when the preparation timer operating for a predetermined time expires.

And e) allowing packet data received from the mobile terminal to be transmitted to a destination, and then performing location update of the mobile terminal.

In this case, the registration timer threshold defined in the standby state has a large value, and the registration timer threshold defined in the ready state has a small value.

In addition, the timer-based location management method using the status information for each mobile terminal in a packet-based mobile communication system according to an aspect of the present invention, the packet-based mobile including a SGSN (Serving GPRS Support Node) for transmitting packet data to the mobile terminal A location management method using status information for each mobile terminal in a communication system, the method comprising: a) if the status of the mobile terminal is in a standby state in which packet data is not transmitted or has a low probability of being transmitted, the mobile terminal has a large value defined in the standby state; Applying a registration timer threshold to a registration timer threshold of the mobile terminal; b) paging all cells within a distance from which the mobile terminal can move for a predetermined time centering on a cell whose location has been recently updated by the mobile terminal and delivering packet data to the mobile terminal; c) allowing packet data received from the mobile terminal to be transmitted to a destination, and then performing location update of the mobile terminal; And d) performing a location update of the mobile terminal if the elapsed time counted from the time of the latest location update by the mobile terminal is greater than the applied registration timer threshold.

In addition, the timer-based location management apparatus using the status information for each mobile terminal in a packet-based mobile communication system according to an aspect of the present invention, the packet-based mobile including a SGSN (Serving GPRS Support Node) for transmitting packet data to the mobile terminal A location management apparatus using state information for each mobile terminal in a communication system, wherein after receiving broadcast information from a base station managing a cell in which the mobile terminal is currently located, an ID (ID) of the cell among the received broadcast information A cell register for storing location registration of the mobile terminal; A registration timer threshold register for applying a registration timer threshold having a different value according to the state of the location-registered mobile terminal; A state register for managing information relating to a state of the location-registered mobile terminal; And a controller configured to update the location of the mobile terminal when the elapsed time counted from the time point at which the mobile terminal was recently registered has exceeded the applied registration timer threshold.

In addition, the mobile terminal according to an aspect of the present invention, in a mobile terminal that receives packet data from a Serving GPRS Support Node (SGSN), receives an ID of the cell from a base station managing a cell in which the mobile terminal is located. A cell register for receiving and performing location registration of the mobile terminal; A registration timer threshold register for applying a registration timer threshold having a different value according to the state of the location-registered mobile terminal; A registration timer that counts the elapsed time from the time when the mobile terminal recently registered the location; A state register for operating a preparation timer operating for a predetermined time and used to classify states of the mobile station registered in the position; And a controller configured to perform location update of the mobile terminal when the counted elapsed time exceeds the applied registration timer threshold.

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. Like parts are designated by like reference numerals throughout the specification.

In the following embodiment of the present invention, for convenience of description, a location management method and a device for each terminal in a general packet radio service (GPRS) system of a packet-based mobile communication system will be described.

However, this is not limited to the present invention, and in some cases, may be applied to other packet-based mobile communication systems having a plurality of terminal states, for example, a mobile IP network having a UMTS or a paging function.

1 is a schematic configuration diagram of a timer-based location management apparatus using state information for each mobile terminal in a packet-based mobile communication system according to an embodiment of the present invention.

As shown in FIG. 1, the mobile communication system 100 includes a packet-based mobile communication system 101 and a packet data network 102 according to an embodiment of the present invention. ) Is representative of the Internet.

In the following embodiment of the present invention, a general packet radio service (GPRS) system as a packet-based mobile communication system 101 will be described. However, this is not limited to the present invention, and in some cases, a mobile IP having a UMTS (Universal Mobile Telecommunication System) or a paging function, which is another packet-based mobile communication system having a plurality of terminal states. (IP) network may also be applied.

The packet-based mobile communication system 101 constituting such a structure includes at least one Serving GPRS Support Node (SGSN) 103,104, and the SGSN 103, 104 is a visitor location register. Register 105) and a home location register 106.

GGSN (Gateway GPRS Support Node, hereinafter referred to as 'GGSN') 107, 108 serves as a data relay between the packet data network 102 and the mobile communication system 101, GPRS system, the packet data is GGSN (107, 108 exits or enters the packet data network 102.

In addition, the mobile communication system 101 includes at least one base station controller (hereinafter referred to as 'BSC', 109 and 110), and the BSC 109 includes a plurality of base transceiver stations (hereinafter referred to as 'BSC'). BTS ', jurisdiction 111, 112). Similarly, other BSCs 110 also govern multiple BTSs 113 and 114.

The mobile communication system 101 includes at least one mobile station 115, 116, which includes a mobile phone or a computer having a data transmission device, a PDA, or the like.

The packet-based mobile communication system constituting this structure will be described in detail. First, the GGSNs 107 and 108 receive packet data from the packet data network 102, and then the current position of the mobile terminal to receive the received packet data. Contact HLR 106.

The HLR 106 then returns the location information of the SGSN 103 that governs the terminating mobile terminal to the GGSN 107. The GGSN 107 transfers the packet data to the SGSN 103 in charge of the mobile terminal by using the received location information.

The SGSN 103 retrieves the current location of the mobile terminal and transmits the packet to the corresponding BSC 108. The BSC 108 also transmits the packet to the corresponding BTS 109 so that the packet data is normally received at the destination terminal. .

FIG. 2 is a diagram illustrating a detailed configuration of the mobile terminal shown in FIG. 1.

As shown in FIG. 2, a mobile terminal 115 (hereinafter referred to as a mobile terminal having 115 for convenience of description) according to an embodiment of the present invention includes a cell register 210 and a registration timer threshold register. and a registration timer threshold register 220, a registration timer 230, a state register 240, a controller 250, and a transceiver 260.

In detail, the cell register 210 stores the cell ID (ID) of the broadcasting information received from the base station 111 in charge of the cell which the mobile terminal 115 most recently updated. Location registration for each terminal is made.

The registration timer threshold register 220 stores a registration timer threshold previously set by the network operator according to the change of the state of the mobile terminal 115, and allows the registration timer threshold that is adapted to the mobile terminal-specific state to change from time to time.

That is, the registration timer threshold register 220 causes a low registration timer threshold to be applied to a mobile terminal in a ready state in which a packet is being transmitted or is likely to be transmitted. A high value registration timer threshold is applied to mobile terminals in a low standby state.

The registration timer 230 counts the elapsed time (or time) from the time when the mobile terminal 115 last updated the location.

The state register 240 stores information on a standby or ready state for each mobile terminal, and controls or initializes a ready timer for a predetermined time set by a network operator. In this case, the values of the ready timer and the ready state registration timer threshold may theoretically have any values, but for a meaningful operation, the case where the value of the ready timer is usually larger than the value of the ready state registration timer threshold is considered. .

When the counted elapsed time exceeds the registration timer threshold, the controller 250 performs location registration for each mobile terminal through the cell register 210, and relates to the cell registers 210 to state registers 210 to 240. Take full control. The transceiver 260 transmits and receives location management-related data to the cell registers to the state registers 210 to 240 under the control of the controller 250.

Next, FIG. 3 is a diagram illustrating a detailed configuration of a Serving GPRS Support Node (SGSN) shown in FIG. 1.

As illustrated in FIG. 3, the SGSN 103 and 104 classify and store information about mobile terminals 114 and 115 under their control into mobile terminals MS1, MS2,... ... includes a cell register 311, a registration timer threshold register 312 and a state register 313, respectively.

In more detail, the cell register 311 stores the ID (ID) of the cell where the mobile terminal 115 has performed the most recent location update, so that the cell register 311 may be used to transmit packet data later.

The registration timer threshold register 312 stores a registration timer threshold previously set by the network operator according to a change in the state of the mobile terminal 115, and is used when the location management for each mobile terminal changes from time to time.

That is, the registration timer threshold register 312 performs location management for each terminal by applying a low registration timer threshold to a mobile terminal in a ready state where a packet is being transmitted or has a high probability of being transmitted. For each mobile terminal in a standby state having low probability of being transmitted or being transmitted, terminal location management is performed by applying a high registration timer threshold.

The state register 313 stores information on the standby or ready state for each of the at least one mobile terminal under the control of the base station 111, and operates or controls a ready timer for a predetermined time set by the network operator. , Initialize it.

When the counted elapsed time exceeds the registration timer threshold, the controller 301 performs location registration for each mobile terminal through the cell register 210 and performs control on the cell registers to the state registers 311 to 313. The function units 320 and ... which perform location management on the other mobile terminals MS2, ... also perform central control.

For reference, the state transition of the mobile terminal 115 will be described with reference to the accompanying drawings.

4 is a diagram conceptually illustrating a state transition of the mobile terminal illustrated in FIG. 2.

As shown in FIG. 4, when the mobile terminal 115 is turned on or connected to the mobile communication system 101 according to a user's selection, the mobile terminal 115 is ready for a packet to be transmitted or has a high probability of being transmitted. It becomes a ready state 400.

Thereafter, if there is no data transmission / reception between the mobile terminal 115, the base station 111, and the base station controller 109 until the value of the preparation timer controlled by the state registers 240 and 313 ends, the value of the preparation timer is lost. The mobile terminal 115 ends and transitions to a standby state 401 (402).

At this time, the state registers 240 and 313 reset the value of the preparation timer when the mobile terminal 115 performs data transmission / reception with the base station 111 and the base station controller 109.

However, the value of the ready timer is not reset by the position update caused by the end of the ready timer registration timer.

When data transmission or reception or location update occurs between the mobile terminal 115 and the packet data network 102 in the standby state, the mobile terminal 115 transitions from the standby state 401 to the ready state 400 again. (403).

Then, the method for managing a location when the mobile terminal is in a ready state will be described with reference to the accompanying drawings.

5 is a flowchart sequentially illustrating a timer-based location management process of a mobile terminal (ready state) according to an embodiment of the present invention.

As shown in FIG. 5, first, when the mobile terminal 115 is powered on or connected to the data packet network 102 according to a user's selection, the cell registers 210 and 311 of the mobile terminal 115 and the SGSN 103 are connected. ) Stores the ID (ID) of the cell where the mobile terminal 115 is currently located among the broadcasting information received from the base station 111 and performs initial location registration (S500), respectively.

Thereafter, the registration timer threshold registers 220 and 312 of the mobile terminal 115 and the SGSN 103 set the value of the registration timer threshold t to the value t1 of the registration timer threshold defined in the ready state (S501). ).

Thereafter, the state registers 230 and 313 of the mobile terminal 115 and the SGSN 103 reset the values of the preparation timers used in the state transition of the mobile terminal 115 to initial values (S502). .

Thereafter, the registration timer 230 of the mobile terminal 115 resets the driving value to an initial value (S503), and then stays in the ready state (S504) and waits for the next event.

In addition, among the various situations that may occur later, a method of managing a location in the case where packet data is received by the mobile terminal 115 (S505) will be described first.

When the mobile terminal 115 receives the packet data in the ready state, the controller 301 of the SGSN 103 is at a movable distance for the elapsed time from the cell where the mobile terminal 115 last updated its location. After paging all the cells (S506), if there is a response from the specific mobile terminal 115, the controller 301 causes the packet data to be delivered to the mobile terminal 115 (S507).

At this time, the elapsed time until the packet data is received from the cell where the mobile terminal 115 was most recently updated location can be inferred from the value of the registration timer, the distance that can be moved during this time is the mobile terminal 115 It can be approximated by using the average speed of.

However, when there is no response to paging from the mobile terminal 115 when paging a cell located within the approximate distance, paging may be sequentially performed while widening the range of paging until a response to paging is received. .

Thereafter, the mobile terminal 115 performs an implicit location update (S508) storing the ID of the cell broadcast from the base station 111 in the cell register 210.

In addition, the cell register 311 of the SGSN 103 also performs an implicit location update (S507) that stores the ID (ID) of the cell in which the mobile terminal 115 is currently located. ).

Thereafter, the state registers 230 and 313 of the mobile terminal 115 and the SGSN 103 reset the values of the preparation timers used in the state transition of the mobile terminal 115 to initial values (1). ).

Next, when packet data is transmitted from the mobile terminal 115, when the mobile terminal 115 transmits the packet data (S510) and transfers the packet data to the destination, the mobile terminal 115 transmits the packet data from the base station 111. An implicit location update (S511) for storing the ID (ID) of the broadcast cell in the cell register 210 is performed.

In addition, the cell register 311 of the SGSN 103 also performs an implicit location update (S511) that stores the ID (ID) of the cell where the mobile terminal is currently located and uses the ID (ID) of this cell when receiving packet data later. .

Thereafter, the state registers 230 and 313 of the mobile terminal 115 and the SGSN 103 reset the values of the preparation timers used in the state transition of the mobile terminal 115 to initial values (1). ).

Next, when the registration timer expires (S514), the mobile terminal 115 transmits a signal packet for location update including the ID (ID) of the cell where the mobile terminal 115 is currently located to the base station 111 to transmit the location. Update (S515), and cell registers 210, 311 stores the ID (ID) of the cell.

The registration timer 230 of the mobile terminal 115 resets the value of the registration timer to the initial value, which counts the movement time of the mobile terminal 115 (2).

Next, when the preparation timer ends (S520), the registration timer threshold registers 220 and 312 set the registration timer threshold value t of the mobile terminal 115 to the registration timer threshold t2 for the waiting state (S521). After that, the process transitions to the standby state (3).

As described above, in the embodiment of the present invention, after setting the registration timer threshold for the mobile terminal that is ready to be small, the registration timer threshold for which the elapsed time from the time when the mobile terminal 115 performs the most recent location update is set to be small. If exceeded, the location update of the mobile terminal is made.

In other words, in the ready state in which a packet is being transmitted or likely to be transmitted to the mobile terminal, frequent location updates are performed due to a small registration timer threshold. Accurate packet delivery is achieved.

Next, a method of managing a location in a standby state in which a packet is not transmitted to the mobile terminal or is less likely to be transmitted will be described with reference to the accompanying drawings.

6 is a flowchart sequentially illustrating a timer-based location management process of a mobile terminal (standby state) according to an exemplary embodiment of the present invention, unlike the location management method in the ready state according to FIG. Based on (t2), location management for each mobile terminal is performed.

As shown in FIG. 6, the mobile terminal 115 waits for the next event in a standby state (S526).

Among the various events that may occur later, packet data reception to the mobile terminal 115 will be described first.

When the mobile terminal 115 receives the packet data in the standby state (S527), the controller 301 of the SGSN 103 may move for a time elapsed from the time when the mobile terminal 115 most recently updated its position. After paging all the cells in S528, if there is a response from the specific mobile terminal 115, the controller 301 causes the packet data to be delivered to the responding mobile terminal 115 (S529).

Thereafter, the mobile terminal 115 performs an implicit location update (S530) storing the ID (ID) of the cell broadcast from the base station 111 in the cell register 210.

In addition, the cell register 311 of the SGSN 103 also performs an implicit location update (S530) that stores the ID (ID) of the cell where the mobile terminal is currently located. I use it.

Thereafter, the registration timer threshold registers 220 and 312 of the mobile terminal 115 and the SGSN 103 set the value t of the registration timer threshold to the value t1 of the registration timer threshold defined in the ready state (4). ).

Next, when packet data is transmitted from the mobile terminal 115 (S532), when the mobile terminal 115 transmits packet data (S533) and transfers the packet data to the destination, the mobile terminal 115 determines the base station ( An implicit location update (S534) of storing the ID (ID) of the cell broadcast from 111 is performed in the cell register 210.

In addition, the cell register 311 of the SGSN 103 also performs an implicit location update (S534) that stores the ID (ID) of the cell where the mobile terminal 115 is currently located. ).

Thereafter, when the preparation timer ends (S535), the mobile terminal 115 transmits a location update signal packet including the ID of the cell where the mobile terminal is currently located to the base station 111 to perform location update (S536). The cell registers 210 and 311 store IDs of cells.

Then, the registration timer threshold registers 220 and 312 of the mobile terminal 115 and the SGSN 103 set the value t of the registration timer threshold to the value t1 of the registration timer threshold defined in the ready state (4). ).

As described above, in the embodiment of the present invention, after the registration timer threshold for the mobile terminal in the standby state is set to a large value, the location update of the mobile terminal is performed when the elapsed time for each mobile terminal exceeds the set registration timer threshold.

In other words, in the standby state where a packet is not being transmitted or is unlikely to be transmitted to a mobile terminal, the location timer is rarely updated due to the largely calculated registration timer threshold, which wastes unnecessary resources due to the location update. It can prevent.

The drawings and detailed description of the invention are exemplary only, and are used for the purpose of illustrating the invention only, and are not intended to be limiting or to limit the scope of the invention described in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

In the packet-based mobile communication system according to the present invention, a timer-based location management method using status information for each mobile terminal and its device are applied to a frequent location update by applying a small estimated registration timer threshold for a ready mobile terminal. Accurate timer-based location management and packet data transmission and reception using the same.

In addition, the present invention has the effect of reducing the overall cost due to the location update for each terminal by applying a highly calculated registration timer threshold for the mobile terminal in the standby (standby) state.

In addition, the present invention is to reduce the paging cost and the number of location update, it is possible to achieve the overall power saving and thereby the life extension for each mobile terminal.

1 is a schematic configuration diagram of a timer-based location management apparatus using state information for each mobile terminal according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a detailed configuration of the mobile terminal shown in FIG. 1.

FIG. 3 is a diagram illustrating a detailed configuration of a Serving GPRS Support Node (SGSN) shown in FIG. 1.

4 is a diagram conceptually illustrating a state transition of the mobile terminal illustrated in FIG. 2.

5 is a flowchart sequentially illustrating a timer-based location management process of a mobile terminal (ready state) according to an embodiment of the present invention.

6 is a flowchart sequentially illustrating a timer-based location management process of a mobile terminal (standby state) according to an embodiment of the present invention.

Claims (16)

In the location management method using the state information for each mobile terminal in a packet-based mobile communication system including a Serving GPRS Support Node (SGSN) for transmitting packet data to the mobile terminal, a) applying a registration timer threshold defined in the ready state as a registration timer threshold of the mobile terminal if the state of the mobile terminal is a ready state in which packet data is being transmitted or has a high probability of being transmitted; b) paging all cells within a distance from which the mobile terminal can move for a predetermined time centering on a cell whose location has been recently updated by the mobile terminal and delivering packet data to the mobile terminal; c) performing a location update of the mobile terminal if the elapsed time counted from the time of the latest location update by the mobile terminal is greater than the applied registration timer threshold; And d) dividing the state of the mobile terminal into a standby state in which packet data is not transmitted or is unlikely to be transmitted when the preparation timer operating for a predetermined time expires; Timer-based location management method using the state information for each mobile terminal in a packet-based mobile communication system comprising a. According to claim 1, e) performing location update of the mobile terminal after transmitting the packet data received from the mobile terminal to a destination; Timer-based location management method using the state information for each mobile terminal in the packet-based mobile communication system further comprising. The method of claim 2, Step b), Performing location update of the mobile terminal that has delivered the packet data; And Initializing a value of a preparation timer for the mobile terminal Timer-based location management method using the state information for each mobile terminal in a packet-based mobile communication system comprising a. The method of claim 2, In step d), Applying a registration timer threshold defined in the standby state as a registration timer threshold of the mobile terminal; Timer-based location management method using the state information for each mobile terminal in a packet-based mobile communication system comprising a. The method of claim 4, wherein The registration timer threshold defined in the standby state and the registration timer threshold defined in the ready state have a different value. Timer-based location management method using state information for each mobile terminal in a packet-based mobile communication system. The method of claim 5, The registration timer threshold defined in the waiting state has a large value, The timer based location management method using the status information for each mobile terminal in the packet-based mobile communication system, characterized in that the registration timer threshold defined in the ready state has a small value. In the location management method using the state information for each mobile terminal in a packet-based mobile communication system including a Serving GPRS Support Node (SGSN) for transmitting packet data to the mobile terminal, a) applying a registration timer threshold having a large value defined in the standby state as a registration timer threshold of the mobile terminal when the state of the mobile terminal is a standby state in which packet data is not transmitted or the probability of transmission is low; b) paging all cells within a distance from which the mobile terminal can move for a predetermined time centering on a cell whose location has been recently updated by the mobile terminal and delivering packet data to the mobile terminal; c) allowing packet data received from the mobile terminal to be transmitted to a destination, and then performing location update of the mobile terminal; And d) performing a location update of the mobile terminal if the elapsed time counted from the point of time when the mobile terminal was recently updated is greater than the applied registration timer threshold; Timer-based location management method using the state information for each mobile terminal in a packet-based mobile communication system comprising a. The method of claim 7, wherein Step b), Performing location update of the mobile terminal that has delivered the packet data; And Applying a registration timer threshold defined in a ready state as a registration timer threshold of the mobile terminal; Timer-based location management method using the state information for each mobile terminal in a packet-based mobile communication system comprising a. The method of claim 8, In step d), Performing a location update of the mobile terminal if the counted elapsed time is greater than the applied registration timer threshold; And Applying a registration timer threshold defined in the ready state as a registration timer threshold of the mobile terminal; Timer-based location management method using the state information for each mobile terminal in a packet-based mobile communication system comprising a. A location management apparatus using state information for each mobile terminal in a packet-based mobile communication system including a Serving GPRS Support Node (SGSN) for transmitting packet data to a mobile terminal, A cell register for receiving a broadcast information from a base station managing a cell in which the mobile terminal is currently located, and storing an ID of the cell among the received broadcast information to perform location registration of the mobile terminal; A registration timer threshold register for applying a registration timer threshold having a different value according to the state of the location-registered mobile terminal; A state register for managing information relating to a state of the location-registered mobile terminal; And A controller for updating the position of the mobile terminal when the elapsed time counted from the time point at which the mobile terminal was recently registered has exceeded the applied registration timer threshold Timer-based location management device using the state information for each mobile terminal in a packet-based mobile communication system comprising a. The method of claim 10, The registration timer threshold register, In the packet-based mobile communication system, if the state of the mobile terminal is a packet state is being transmitted or a ready state with a high probability of being transmitted, the registration timer threshold having a small value is applied as the registration timer threshold of the mobile terminal. Timer-based location management device using status information for each mobile terminal. The method of claim 11, wherein The registration timer threshold register, In the packet-based mobile communication system, if the status of the mobile terminal is not transmitting the packet data or the standby state is low probability of transmitting, the registration timer threshold having a large value is applied as the registration timer threshold of the mobile terminal. Timer-based location management device using the state information of each mobile terminal. The method of claim 12, The state register, Timer-based location management device using the status information for each mobile terminal in a packet-based mobile communication system, characterized in that for operating a predetermined time to operate for a predetermined time, the mobile terminal is used to distinguish between the ready or standby state. A mobile terminal for receiving packet data from a serving GPRS support node (SGSN), A cell register configured to receive an ID of the cell from a base station managing a cell where the mobile terminal is located and perform location registration of the mobile terminal; A registration timer threshold register for applying a registration timer threshold having a different value according to the state of the location-registered mobile terminal; A registration timer that counts the elapsed time from the time when the mobile terminal recently registered the location; A state register for operating a preparation timer operating for a predetermined time and used to classify states of the mobile station registered in the position; And A controller for updating the location of the mobile terminal when the counted elapsed time exceeds the applied registration timer threshold Mobile terminal in a packet-based mobile communication system comprising a. The method of claim 14, The registration timer threshold register, In the packet-based mobile communication system, if the state of the mobile terminal is a packet state is being transmitted or a ready state with a high probability of being transmitted, the registration timer threshold having a small value is applied as the registration timer threshold of the mobile terminal. Mobile terminal. The method of claim 14, The registration timer threshold register, In the packet-based mobile communication system, if the status of the mobile terminal is not in the packet data transmission or the standby state is low probability of transmission, the registration timer threshold of the mobile terminal is applied to a registration timer threshold having a large value. Mobile terminal.