KR20090054037A - Method and apparatus for paging in wireless communication system - Google Patents

Abstract

A paging method in a wireless communication system according to an embodiment of the present invention, which may use a mobile propensity of a terminal and perform paging for a plurality of paging groups, may include information of a base station changed according to the movement of the terminal. Determining the number of paging groups by referring to a database in which information of a paging group including the base station is recorded; And if the number of paging groups is greater than or equal to a reference value, sequentially performing paging for a base station corresponding to information of the base station recorded in the database.

Paging, Paging Groups, and Propensity to Move

Description

Paging method and apparatus in wireless communication system {Method and Apparatus for Paging in Wireless Communication System}

The present invention relates to a method and apparatus for paging in a wireless communication system, and more particularly, to a method and apparatus for performing paging for a plurality of paging groups by using a mobile propensity of a terminal.

Paging is a procedure in which a wireless communication system transmits data to a terminal or calls a terminal to determine the location of the terminal. Paging is a region including a plurality of base stations (BSs). Paging Zone) and the service area is divided into a plurality of paging zones.

1 is a block diagram of a general wireless communication system for performing paging. Hereinafter, terms described may be interpreted with reference to WiBro, WiMAX Forum Network Architecture, or IEEE 802.16 standard.

The wireless communication system illustrated in FIG. 1 is a LR (Location Register) 102 having information on an Idle Mode terminal under an Access Service Network (ASN), and manages activities in an idle state of the terminal. PC (Paging Controller) 104, and the base station (106, 108, 110).

When paging is performed, the base station 106,108,110 serves as a paging agent (106,108,110) that performs paging related functions with the PC 104, and the paging group (112,114,116) is a set of PAs (106,108,110). ) Means a set.

Referring to FIG. 1, a first base station 106 is mapped to a first paging group 112 having a paging group identifier (PGID), " PGID (1), " 112 or the second paging group 114. The first PC 104 also manages paging for two paging groups 112 and 114.

2A and 2B are diagrams illustrating a general paging algorithm, in which FIG. 2A illustrates a single-step paging method and FIG. 2B illustrates a multi-step paging method.

Referring to FIG. 2A, a paging group (not shown) may be divided into sub groups (Sub Groups 204a, 206a, and 208a). In the single step paging method, an anchor PC (Anchor Paging Controller: 202a) may display all subs at one point in time. The paging notification message is transmitted to the base stations (not shown) of the groups 204a, 206a, and 208a. At this time, the paging notification message may be transmitted to the base station through a relay PC (Relay Paging Controller (not shown)).

Referring to FIG. 2B, in the multi-step paging method, the anchor PC 202b stores the last serving base station (not shown), transmits a paging notification message to the subgroup 204b to which the last serving base station belongs, The paging area is sequentially extended to the remaining subgroups 206b and 208b until there is a response.

The single step paging method consumes considerable radio resources because the paging procedure is performed for the entire base station belonging to the paging group. However, if the area of the paging group is reduced to reduce such resource consumption, the terminal must frequently update its location and there is a problem that the response probability of the terminal according to the paging procedure is lowered.

The multi-step paging method can solve problems such as resource consumption caused by the single-step paging method by sequential paging, but there is a problem in that a paging method for a plurality of paging groups is not specified.

As a result, if the terminal travels between base stations belonging to different paging groups due to a wide moving radius, the probability of finding the terminal during paging is significantly reduced, and there is a case where paging is required for all subgroups, and thus a large delay time is required. And a problem in which radio resources are consumed.

Disclosure of Invention The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a paging method and apparatus in a wireless communication system using a mobile propensity of a terminal.

Another object of the present invention is to provide a paging method and apparatus in a wireless communication system capable of performing paging for a plurality of paging groups.

A paging method in a wireless communication system according to an aspect of the present invention for achieving the above object is described with reference to a database in which information of a base station changed according to movement of a terminal and information of a paging group including the base station are recorded. Determining the number of paging groups; And if the number of paging groups is greater than or equal to a reference value, sequentially performing paging for a base station corresponding to information of the base station recorded in the database.

Paging method in a wireless communication system according to another aspect of the present invention for achieving the above object, if the paging start condition is satisfied, selecting a terminal to send a paging message; If the number of paging groups mapped to paging group information recorded in a database corresponding to the terminal is at least two, including paging for the paging group, wherein the database is changed due to movement of the terminal for a specific time. At least one entry including serving base station information and the paging group information mapped to the serving base station information is recorded.

Paging apparatus in a wireless communication system according to an aspect of the present invention for achieving the above object is a terminal status information management unit for determining whether to change the information of the base station and the information of the paging group including the base station according to the movement of the terminal; ; A terminal location table manager configured to record the changed information of the base station and the changed paging group in a database when it is determined that the information of the base station and the information of the paging group are changed; And a paging performing unit configured to determine the number of paging groups with reference to the database, and sequentially perform paging for a base station corresponding to information of the base station recorded in the database if the number of paging groups is greater than or equal to a reference value. It features.

As described above, according to the present invention, paging is performed by using a mobile propensity of a terminal, so that a paging method and apparatus in a wireless communication system having a high probability of finding a terminal and low radio resources and time consumption can be implemented. .

In addition, the present invention can implement paging for a plurality of paging groups, it is possible to implement a paging method and apparatus in a wireless communication system that can increase the probability of finding a terminal having a large moving radius, and reduce the radio resource consumption and time delay. That has a different effect.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram illustrating an apparatus for paging in a wireless communication system according to an embodiment of the present invention.

As shown, the paging device in the wireless communication system according to an embodiment of the present invention to determine the paging method by determining the mobile tendency of the mobile station (MS), and performs a paging procedure corresponding to the determination result The apparatus includes a paging triggering determiner 302, a location update processor 304, a terminal status information manager 306, a terminal location table manager 308, and a paging performer 310.

A paging device in a wireless communication system according to an embodiment of the present invention may be a device included in a paging controller (PC) or a device separate from the PC.

The paging triggering determination unit 302, if there is a downlink data traffic to be delivered to the terminal or receives a paging request for the location update (Location Update) of the terminal from the location update processing unit 304, the terminal to confirm the paging availability The situation information manager 306 transmits the information. After receiving the determination result of whether paging is possible from the terminal status information management unit 306, if it is determined that paging is possible, the paging execution unit 310 transmits a paging start request.

The location update processing unit 304 processes a location update request of a terminal in an idle state (Idle Mode), receives a location update request of the terminal, or an error condition such as an expiration of an idle mode system timer. condition), the paging triggering determination unit 302 requests a paging.

Here, the location update request of the terminal refers to a request for the terminal to periodically update the location information at predetermined time intervals or a request for updating the location information when the terminal moves out of the paging group. The periodic location update and the location update based on the paging group are to keep the latest information on the terminal so that the paging service can be successfully received.

The terminal situation information management unit 306 records and manages information of the terminal in the idle state. Also, it is determined whether information of a base station (BS) and information of a paging group including the base station are changed according to the movement of the terminal. Here, the information of the base station according to the movement of the terminal is an identifier (BS ID) of the serving base station recorded when the terminal enters the network or the terminal is updated when the terminal is idle, and the information of the paging group including the base station is the serving. It may be an identifier (PG ID) of the paging group including the base station.

In addition, the terminal context information management unit 306, if the identifier of the serving base station or the identifier of the paging group including the serving base station is changed by the movement of the terminal, the identifier of the newly obtained serving base station or the paging group including the serving base station Is transmitted to the terminal location table manager 308.

In addition, the terminal context information manager 306 transmits the determination result to the paging triggering plate end 302 when receiving a confirmation request for paging availability from the paging trigger determination unit 302. The determination of whether paging is possible is determined based on paging preference information of a terminal or paging policy of a corresponding wireless communication system.

In addition, the terminal context information management unit 306 deletes the information of the terminal when there is no response from the terminal despite all paging procedures.

When the terminal location table manager 308 receives an identifier of a serving base station or an identifier of a paging group including the serving base station from the terminal context information manager 306 according to the movement of the terminal, the terminal location table manager 308 stores the received information in a database (not shown). To record. Hereinafter, the database will be referred to as a terminal location table. Here, if the terminal position table is not generated, it is newly generated and recorded.

4 illustrates a terminal location table according to an embodiment of the present invention.

As shown, the terminal location table 402 is a database that defines, as one entry, a pair of identifiers of a serving base station changed due to movement of a terminal and an identifier of a paging group including the base station as one entry, for example, for the last 12 hours. Three entries 404, 406, 408 are recorded.

Here, the entries 404, 406, 408 of the terminal location table 402 are recorded in a first in, first out (FILO) manner. This is to ensure that the paging is sequentially performed from the last recorded entry 408. Here, the entry 404, which was the last serving base station and was last recorded in the terminal location table 402, has a base station identifier "BSID30" and a paging group identifier "PGID1".

The information recorded in the terminal position table 402 is additionally recorded when it differs from an entry already recorded in the terminal position table 402. That is, if the identifier of the serving base station and the identifier of the paging group including the serving base station received from the terminal context information management unit 306 are already recorded in the terminal location table 402, the information is not recorded. This is to prevent paging of the overlapped area because each base station mapped to the entries 404, 406, 408 of the terminal location table 402 becomes a target of paging sequentially.

Determining the movement tendency of the terminal with reference to the terminal location table 402, the terminal has a base station identifier of "BSID10" for the last 12 hours and belongs to the paging group having a paging group identifier of "PGID1", "BSID20" After moving to a base station belonging to a paging group having a base station identifier of "PGID2" and having a paging group identifier of "PGID2", it is moved to a base station belonging to a paging group having a base station identifier of "BSID30" and having a paging group identifier of "PGID1". Can be.

In the above-described embodiment, the size of the terminal location table 402 is determined based on a specific time of 12 hours. However, in the modified embodiment, the size of the terminal location table 402 may be determined based on the number of specific entries. have. For example, when the terminal location table 402 may have three entries, the identifier of the base station newly changed by the movement of the terminal in the state where the three entries are recorded and the identifier of the paging group including the base station are the terminal location table. If received by the management unit 308, the entry recorded first in the terminal location table 402 may be deleted and the newly received entry may be recorded.

As described above, determining the size of the terminal location table 402 by a specific time or a specific number records the information of a base station to which the terminal has moved during a recent specific time to determine a recent propensity of movement of the terminal, or a terminal location having a specific number of entries. The intention is to maintain the table 402 to determine the recent mobility tendency of the terminal through the information of the specific number of base stations passed by the terminal.

Referring back to FIG. 3, when the paging execution unit 310 receives a paging start request from the paging triggering determination unit 302, the paging execution unit 310 determines a paging execution method and performs paging accordingly.

Specifically, the paging performer 310 includes the base station identifier and the base station from the terminal location table management unit 308 when the number of paging groups having different paging group identifiers recorded in the terminal location table 402 is greater than or equal to the reference value. The identifier of the paging group is obtained, and the paging procedure is sequentially performed for the base station corresponding to the base station identifier until the terminal responds.

Hereinafter, the paging performing method of the paging performer 310 is described in detail through the terminal location table 402 illustrated in FIG. 4. First, the paging performer 310 is recorded with reference to the terminal location table 402. It is determined whether the number of paging groups is greater than the reference value. Here, since "PGID1" and "PGID2" are recorded in the terminal location table 402, it can be seen that the number of recorded paging groups is two.

If the reference value is 2, the number of recorded paging groups is equal to or greater than the reference value, so that the paging performer 310 corresponds to the base station identifier most recently recorded in the terminal location table 402 until the terminal responds. The paging procedure is sequentially performed from the base station.

Here, the base station to be subjected to the first paging is mapped to the third entry 404 last recorded in the terminal location table 402, has a base station identifier of "BSID30" and paging with a paging group identifier of "PGID1" Belongs to the group.

The base station to be subjected to the second paging operation is mapped with the second entry 406 and belongs to a paging group having a base station identifier of "BSID20" and a paging group identifier of "PGID2".

The base station to be subjected to the third paging operation is mapped with the first entry 408 and belongs to a paging group having a base station identifier of "BSID10" and a paging group identifier of "PGID1".

In one embodiment, when paging is performed for each base station by the above-described method, paging is simultaneously performed for other base stations included in a subgroup mapped to each base station. This is because the paging group may be divided into a plurality of subgroups, and each subgroup includes a plurality of base stations, thereby increasing the probability of finding a terminal by expanding a paging area to the entire subgroup including the paging target base station. This will be described in detail with reference to FIG. 5.

FIG. 5 is a diagram illustrating a structure of a paging group and a subgroup belonging to a paging group which is a moving path of a terminal shown in the terminal location table 402 of FIG. 4.

Paging group 502 with an identifier of "PGID1" has two subgroups 506 and 508, and paging group 504 with an identifier of "PGID2" has one subgroup 510. Here, referring to the terminal location table 402 as described above, when paging is performed for the base station having the identifier of "BSID30", not only the base station having the identifier of "BSID30" but also belonging to the same subgroup 508 Paging is also performed for base stations having an identifier of BSID31 "and" BSID32 ". If there is no response from the UE, the base station having the next identifier "BSID20" is similarly paging to the subgroup 510 mapped to the base station. The same applies to a base station having an identifier of "BSID10" which is the next turn.

In a modified embodiment, when paging is performed for each base station by the above-described method, paging may be simultaneously performed for base stations within a specific distance from each base station. This is to increase the probability of finding a terminal by extending a paging area to another base station within a specific distance from the paging target base station.

In a modified embodiment, when paging is performed for each base station by the above-described method, paging may be simultaneously performed for another base station having the same paging group as each base station. Here, the paging group is not duplicated.

Referring back to FIG. 3, when the reference value is 2 and the number of paging groups recorded in the terminal location table 402 is one, paging is performed by a multi-step paging method. do.

In order to perform such multi-step paging, the paging execution unit 310 obtains the identifier of the last serving base station updated in the terminal context information management unit 306 or the base station identifier last recorded in the terminal location table 402. Then, paging is first performed on the subgroup mapped to the base station corresponding to the obtained identifier, and if there is no response from the terminal, the paging area is expanded to the next subgroup according to a preset condition.

In a modified embodiment, the paging performer 310 may use a single step paging method when the number of paging groups recorded in the terminal location table 402 is less than the reference value.

Subsequently, the paging execution unit 310 performs paging by sequentially generating a paging notification (Paging_Announce) message for the base station selected as the paging target by the above-described method and sequentially transmitting until the terminal responds. In one embodiment, the Paging_Announce message may be delivered to the base station by a relay paging controller (Relay PC).

In the above-described embodiments, the paging device in the wireless communication system according to an embodiment of the present invention has been described as being divided into various components, but the components may be implemented in a combined form.

6 is a flowchart illustrating a paging method in a wireless communication system according to an embodiment of the present invention.

First, a database in which information of a base station changed according to movement of a terminal and information of a paging group including the base station is recorded is maintained (S602). Hereinafter, the database will be described as a terminal location table.

In the terminal location table, a pair of information of a base station that changes according to movement of a terminal and information of a paging group including the base station is defined as one entry. Hereinafter, the case where the information of the base station is a base station identifier of the base station and the information of the paging group is a page group identifier of the paging group will be described as an example.

The identifier of the base station changed according to the movement of the terminal and the identifier of the paging group including the base station are added to the entry of the terminal location table if they are different from the information recorded in the terminal location table. This is to prevent paging of the overlapped area because each entry of the terminal location table is sequentially subjected to paging.

The entries are recorded in the terminal location table within a specific time or a specific number of ranges. This is to record the information of the base station moved by the terminal during a specific time in recent years, or to grasp the current propensity of movement of the terminal, or to maintain the terminal location table with a specific number of entries to determine the terminal's information through the specific number of base stations passed by the recent terminal. This is to identify the propensity to move.

Here, entries recorded in the terminal location table are recorded in the FILO method. This is to ensure that the paging is sequentially referred to from the last recorded entry.

Next, it is determined whether the terminal location update condition is satisfied (S604a) or whether downlink data traffic is generated (S604b). Here, the location update condition of the terminal may be satisfied when a request for periodically updating location information is generated from the terminal or when a request for updating location information occurs when the terminal leaves the paging group due to movement.

In addition, if downlink data traffic occurs (S604b), it is determined whether paging selection information (Paging Preference) is 1 (S606), if the paging selection information is 1, go to the next step, if 0, paging is not performed and the procedure ends. do.

Next, when the terminal location update condition is satisfied (S604a) or downlink data traffic occurs (S604b), it is determined whether the number of paging groups having different paging group identifiers recorded in the terminal location table is greater than or equal to the reference value (S608). For example, if the reference value is 2, if the number of paging groups recorded in the terminal location table is two, the number of paging groups may be determined to be equal to or greater than the reference value.

In the step of selecting a paging target base station using the terminal location table (S610a), when the number of paging groups having different paging group identifiers recorded in the terminal location table is greater than or equal to the reference value, the identifier of the recorded base station and the identifier of the paging group including the base station And sequentially select the base station corresponding to the received base station identifier until there is a response from the terminal.

For example, the step of selecting a paging target base station using the terminal location table (S610a) and the following steps in detail, first, the base station corresponding to the base station identifier most recently recorded in the terminal location table is selected. Here, the first selected base station will be mapped to the last recorded entry in the terminal location table.

Thereafter, paging is performed by generating and transmitting a paging notification (Paging_Announce) message to the first selected base station (S612). In one embodiment, a paging notification message may be simultaneously transmitted to a base station of a subgroup mapped to the first selected base station, where the paging group may be divided into several subgroups, and each subgroup may be multiple base stations. In order to increase the probability of finding the terminal by expanding the paging area to the entire subgroup including the first selected base station.

In a modified embodiment, paging may be simultaneously performed for a base station within a specific distance from the first selected base station. This is to increase the probability of finding a terminal by extending a paging area to a base station within a specific distance from the first selected base station.

 In one embodiment, the Paging_Announce message may be delivered to the base stations by a relay paging controller (Relay PC).

Then, it is determined whether there is a response from the terminal (S614), and if there is no response from the terminal, the next base station to perform paging is selected from the terminal location table (S610a). At this time, the paging procedure was performed for the base station corresponding to the last base station identifier described in the terminal location table, but there was no response from the terminal. Next, the next step is determined to be the base station corresponding to the second base station identifier listed in the terminal location table. Will be

Thereafter, paging is performed by transmitting a Paging_Announce message to the second selected base station and other base stations included in the subgroup mapped to the second selected base station (S612), and detects the terminal's response (S614). The above process is repeatedly performed.

In one embodiment, even though the paging procedure is performed for all the base stations selected through the terminal location table, if there is no response from the terminal, the information of the terminal may be deleted.

Next, the paging target base station selection step (S610b) using the multi-step page method and the following steps will be described. For example, if the reference value is 2 and the number of paging groups recorded in the terminal location table is 1, The number becomes less than the reference value and the paging target selection step S610b using multi-step paging is performed.

First, the identifier of the last serving base station that has been updated as the target base station or the base station identifier recorded last in the terminal location table is obtained.

In addition, paging is first performed on the subgroup mapped to the base station corresponding to the obtained identifier (S612), and it is determined whether there is a response from the terminal (S614). If there is no response from the terminal, the next subgroup is selected according to a preset condition (S610b), and the paging area is gradually expanded.

In a modified embodiment, the paging procedure may be performed through a single step paging method instead of the multi step paging method.

As described above, according to the present invention, when the mobile propensity of the terminal is within a plurality of paging group ranges, paging the selected base station by using the terminal location table that records the mobile propensity of the terminal, thereby reducing the radio resources and time consumption. It is possible to increase the probability that can be found, and when the mobility tendency of the terminal is within the range of one paging group, by performing a paging procedure to the base station using a multi-step paging method, it is possible to prevent the consumption of radio resources.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features.

For example, in the above-described embodiment, a method of performing paging is determined by determining the number of paging groups having different identifiers in a database in which an identifier of a base station changed according to movement of a terminal and an identifier of a paging group including the base station are recorded. However, in the modified embodiment, regardless of the number of paging groups recorded in the database, paging may be sequentially performed to the base stations corresponding to the base station identifiers recorded in the database.

Therefore, it is to be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the invention is indicated by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the invention. do.

1 is a block diagram of a general wireless communication system for performing paging.

2A and 2B are schematic diagrams illustrating a general paging algorithm.

3 is a block diagram illustrating a paging apparatus in a wireless communication system according to an embodiment of the present invention.

4 is a terminal location table according to an embodiment of the present invention.

FIG. 5 is a diagram illustrating a structure of a paging group and a subgroup belonging to a moving path of a terminal shown in a terminal location table. FIG.

6 is a flowchart illustrating a paging method in a wireless communication system according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

302: paging trigger determination unit 304: position update processing unit

306: terminal status information management unit 308: terminal location table management unit

310: paging execution unit

Claims (26)

Determining the number of paging groups with reference to a database in which information of a base station changed according to movement of a terminal and information of a paging group including the base station are recorded; And If the number of paging groups is greater than or equal to a reference value, sequentially performing paging for a base station corresponding to information of the base station recorded in the database; Paging method in a wireless communication system comprising a. The method of claim 1, In the database, the information of the base station and the information of the paging group is recorded in the wireless communication system, characterized in that within a specific time or a certain number of ranges. The method of claim 1, And the pair of information of the base station and the information of the paging group is recorded in the database as one entry. The method of claim 3, Determining whether the pair of information of the base station and the information of the paging group is the same as an entry already recorded in the database; And If the pair of information of the base station and the information of the paging group is not the same as an entry already recorded in the database, recording the pair of information of the base station and the information of the paging group as a new entry in the database. Paging method in a wireless communication system, characterized in that it further comprises. The method of claim 1, In the step of performing the paging, the paging method in the wireless communication system, characterized in that performed sequentially from the paging group corresponding to the information of the base station finally recorded in the database. The method of claim 1, In the step of performing the paging, the paging method in the wireless communication system, characterized in that for performing the paging with the other base station included in the subgroup of the paging group mapped to the base station is performed. The method of claim 1, In the step of performing the paging, paging method in the wireless communication system, characterized in that for performing the paging together with the other base station within a predetermined distance from the base station is performed. The method of claim 1, In the step of performing the paging, the paging is performed until there is a response from the terminal, And if there is no response from the terminal, deleting the information of the terminal. The method of claim 1, If the number of paging groups is less than the reference value, performing the paging by a single-step paging method or a multi-step paging method. Paging method. The paging method of claim 1, wherein the information of the base station is a base station identifier of the base station, and the information of the paging group is a paging group identifier of the paging group. If a paging start condition is satisfied, selecting a terminal to transmit a paging message; If the number of paging groups mapped to paging group information recorded in a database corresponding to the terminal is 2 or more, performing paging for the paging group; And at least one entry including the serving base station information changed by the movement of the terminal for the specific time and the paging group information mapped to the serving base station information is recorded in the database. The method of claim 11, And in the step of performing the paging, the paging is sequentially performed on the entry until a response to the paging is received from the terminal. The method of claim 11, And if the number of paging groups is 1, single step paging or multi step paging. The method of claim 11, The paging start condition is a paging method in the wireless communication system, characterized in that the presence of downlink traffic to the terminal or the location update request of the terminal. A terminal status information management unit which determines whether information of a base station and information of a paging group including the base station are changed according to the movement of the terminal; A terminal location table manager configured to record the changed information of the base station and the changed paging group in a database when it is determined that the information of the base station and the information of the paging group are changed; And A paging performer configured to determine the number of paging groups with reference to the database, and sequentially perform paging for a base station corresponding to information of the base station recorded in the database if the number of paging groups is greater than or equal to a reference value; Paging device in a wireless communication system comprising a. The method of claim 15, And the terminal location table management unit records the information of the base station and the information of the paging group in the database within a specific time or a specific number of ranges. The method of claim 15, And the terminal location table manager records the information of the base station and the information of the paging group in the database in a first-in first-out (FILO) manner. The method of claim 15, The terminal location table management unit And a pair of the information of the base station and the information of the paging group in the database as one entry. The method of claim 18, The terminal location table manager determines whether a pair of information of the base station and information of the paging group is the same as an entry already recorded in the database, and an entry in which the pair of information of the base station and the information of the paging group is already recorded in the database. And a pair of information of the base station and the information of the paging group is recorded as a new entry in the database if not equal to the paging device. The method of claim 15, And the paging execution unit performs paging sequentially from a paging group corresponding to information of the base station recorded in the database. The method of claim 15, When the paging performer performs paging for a base station corresponding to the information of the base station, the paging performer performs paging with other base stations included in a subgroup mapped to the base station on which the paging is performed Paging device in the. The method of claim 15, When the paging unit performs paging for the base station corresponding to the information of the base station, paging in the wireless communication system, characterized in that for performing the paging together with the other base station within a predetermined distance from the base station is performed; Device. The method of claim 15, The paging execution unit performs paging until there is a response from the terminal, The terminal status information management unit, if there is no response from the terminal, the paging device in the wireless communication system, characterized in that for deleting the information of the terminal. The method of claim 15, The paging performing unit performs paging in a single-step paging method or a multi-step paging method when the number of paging groups is less than the reference value. Device. The method of claim 15, And the information of the base station is a base station identifier of the base station, and the information of the paging group is a page group identifier of the paging group. The method of claim 15, And a paging triggering determination unit for requesting paging to the paging performer when downlink data traffic occurs or when a paging request for location update of the terminal is received.

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