KR20070014845A - Method and system for paging subscriber station located in borderline area of paging areas in portable internet - Google Patents

Abstract

A method and a system for paging a PSS located in a borderline area of paging areas in portable Internet are provided to supply a portable Internet service as soon as updating location information of the PSS by performing a paging process in the current paging group and storing information about the PSS in a candidate paging group when it is determined that the PSS is located in the borderline area, thereby reducing service failure and service delay. A system for paging a PSS(Personal Subscriber Station) located in a borderline area comprises the followings: a paging control server(170) which stores location information received from the PSS(110) according to a location information upgrade process performed by the PSS, and transmits a paging request signal; and RASs(Radio Access Stations)(120,122) which receive the paging request signal from the paging control server(170), and store PSS information in a candidate paging group according to the paging request signal.

Description

Method and System for Paging Subscriber Station Located in Borderline Area of Paging Areas in Portable Internet}

1 is a block diagram showing a schematic configuration of a system for paging a personal subscriber station located at a border area of a paging area in a portable Internet according to a preferred embodiment of the present invention;

2 is a flowchart illustrating a method of paging a personal subscriber station located at a border area of a paging area in a portable Internet according to a preferred embodiment of the present invention;

3 is a flowchart illustrating a method of paging a personal subscriber station by a wireless access device of a candidate paging area in a portable Internet according to a preferred embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

110: PSS 120: first RAS

122: second RAS 130: ACR

140: IP network 150: HA

160: AAA 170: Paging Control Server

180: first paging area 182: second paging area

The present invention relates to a method and system for paging a Personal Subscriber Station (PSS) located at a border region of a paging area in a portable Internet (Wireless Broadband Internet). More specifically, in a method of paging to the PSS in the idle mode in the portable Internet system, the PSS in the boundary region of the multiple paging zones performs location information update due to frequent paging group changes. In order to prevent service failures and service delays, a condition for checking a paging boundary region is set so that if the PSS is determined to be in the boundary region, paging is performed in the current paging group, and the PSS information is stored in the candidate paging group. The present invention relates to a method and system for paging a PSS located at a border area of a paging area in a portable Internet providing a portable Internet service upon receiving the location information update of the PSS.

The portable internet system uses various types of portable terminals such as laptops, PDAs, and handheld PCs to access various types of information and contents by accessing the Internet in indoor and outdoor stationary environments and in mobile environments at walking speeds and low to medium speeds. It is a service. In addition, IP-based wireless data provides mobility of 60 km / h per hour, 24 Mbps downlink transmission rate, and MIMO (Multiple Input Multiple Output) system for up to 50 Mbps downlink transmission speed. System.

In addition, the portable Internet system uses a 2.3 GHz frequency band, uses a time division duplex (TDD) as a duplex method to effectively use the allocated frequency spectrum, and a multiple access method. Orthogonal Frequency Division Multiple Access (OFDMA) is used for this purpose.

Since the mobile internet system mainly provides Internet services to mobile mobile Internet subscribers, when the mobile internet subscriber moves and the location of the PSS changes, the PSS performs a location information update procedure to perform its location with the mobile internet system. Register the information. The portable Internet system stores the location information of the PSS according to the location information update procedure of the PSS, and provides the portable Internet service to the modified PSS accordingly.

Meanwhile, the portable Internet system, like other mobile communication systems, calls the PSS to determine the state and location of the PSS. The procedure of calling the PSS is called paging. In a portable Internet system, paging is performed by setting a predetermined area as a paging area and dividing a service area into a plurality of paging areas.

On the other hand, in the portable Internet system, when the PSS is not registered with a specific radio access station (RAS), the PSS periodically checks only a paging broadcast message, so that the PSS moves frequently. In order to prevent overhead caused by handover, the concept of idle mode is introduced in PSS, and the terminal in idle mode performs a location information update procedure in units of a paging group.

Therefore, the paging group should be configured to allow the PSS to stay in the same paging area for a sufficient time, taking into account the movement characteristics, density, and geographical characteristics of the population. If the area that the paging group is in charge of is too small, the location information update procedure occurs frequently. If the area is set too large, the amount of data for the transmission of the paging message increases, increasing the overhead of paging message propagation.

On the other hand, even when the PSS is located at the border area of the paging area, the PSS continuously performs location update procedure while the PSS is in the border area of the paging area as described above. There is a problem that occurs.

In order to solve the above-described problem, the present invention provides a method of paging to an idle mode PSS in a portable Internet system, wherein the PSS at the boundary area of a plurality of paging zones is frequently changed to a paging group. To prevent service failures and service delays by performing location information update, a condition for checking the paging boundary region is set so that if the PSS is determined to be in the boundary region, the current paging group is paged, and the candidate paging group The purpose of the present invention is to provide a method and system for paging a PSS located at a border area of a paging area in a portable Internet providing a portable Internet service as soon as the PSS stores information of the PSS and receives the location information update of the PSS.

Accordingly, according to a first object of the present invention, a personal subscriber station (PCB) storing location information including a current paging group ID, a candidate paging group ID, and a valid time (hereinafter, referred to as an 'effective time') for the candidate paging group ( PSS: Personal Subscriber Station (hereinafter referred to as 'PSS'), handover function, packet routing function, ACR performing Internet access function, IP network performing data transmission and reception, HA performing routing function of forwarded packets, A system comprising an AAA for charging packet data, the system comprising: a paging control server for storing the location information received from the PSS and transmitting a paging request signal according to a location information update procedure performed by the PSS; And a radio access station (RAS), which receives the paging request signal from the paging control server and stores PSS information in a candidate paging group according to the paging request signal.

According to a second object of the present invention, a personal subscriber station (PSS), which is provided with a portable Internet service and performs data communication by accessing the wireless Internet while on the move, refers to the portable Internet service. A system comprising a mobile internet network providing and a paging control server for controlling paging of the PSS, the method of paging the PSS located at a boundary area between a first paging area and a second paging area, the method comprising: (a) the PSS; Receiving location information from the PSS, including location information including a current paging group ID, a candidate paging group ID, and a valid time; (b) storing terminal location information including an update time which is a time at which the location information update is performed and the location information; (c) checking the valid time and the elapsed time when the PSS needs to be paged to determine whether the valid time is greater than the elapsed time; And (d) transmitting a paging request signal to a paging group of the current paging group ID and a paging group of the candidate paging group ID when the valid time is greater than the elapsed time as confirmed in the step (c). to provide.

According to a third object of the present invention, when a valid time is greater than an elapsed time in a paging group of a candidate paging group ID, a paging request signal is received from a paging control server, and the PSS information is stored according to the received paging request signal. A method of paging a PSS by a radio access station (RAS), the method comprising: (a) setting a paging time indicating a time for storing the PSS information; (b) storing PSS information according to the received paging request signal; (c) determining whether the location information update has occurred between the PSS and the paging control server; And (d) when the location information update occurs between the PSS and the paging control server in step (c), transmitting the PSS information to the PSS and connecting a portable Internet service.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a Personal Subscriber Station (PSS) located at a boundary area of a paging area in a portable Internet or a wireless broadband Internet (WPS) according to a preferred embodiment of the present invention. Block diagram showing a schematic configuration of a system for paging).

In the portable Internet according to the preferred embodiment of the present invention, a system for paging a PSS located at a boundary area of a paging area includes a PSS 110 and a first radio access device (RAS) (hereinafter referred to as RAS) 120 ), A second RAS 122, an access control router (ACR) (130), an IP network (140), a home agent (HA) hereinafter ' HA ") 150, a billing server (AAA: Accounting, Authentication, Authorization, hereinafter referred to as 'AAA') 160, a paging controller server 170, and the like.

Here, one network including the first RAS 120, the second RAS 122, the ACR 130, the IP network 140, the HA 150, the AAA 160, and the paging control server 170 is formed. For convenience of explanation, it will be referred to as a portable Internet network.

The PSS 110 refers to a portable terminal provided with a portable internet service from a portable internet network. The PSS 110 includes a low power radio frequency (RF) / intermediate frequency (IF) module and includes a controller function, a MAC (media access control) frame variable control function, a handover function, and authentication according to a radio wave environment. And an encryption function. In addition, the PSS 110 is equipped with a browser for accessing the Internet for accessing the portable Internet network and using the portable Internet service.

Here, the PSS 110 may be a personal digital assistant (PDA), a hand-held PC, a notebook PC, a smart phone, a multi-mode multi-band (MM-MB) terminal, or the like. In particular, a smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal portable terminal, and includes a terminal that integrates data communication functions such as schedule management, fax transmission and Internet access, etc. it means. In addition, the multi-mode multi-band terminal has a multi-modem chip, and means a terminal capable of operating not only in the portable Internet system but also in other mobile communication systems, for example, a CDMA 2000 system, a WCDMA system, and the like.

Hereinafter, for convenience of description, the area governed by the first RAS 120 serving as the first paging group is controlled by the first paging area 180 and the second RAS 122 serving as the second paging group. Assume that the area governed by) is the second paging area 182.

When the PSS 110 moves from the first paging area 180 to the second paging area 182, the PSS 110 performs location information update with the paging control server 170 to perform a current paging group ID, a candidate paging group ID, and a candidate paging group. Store location information including the valid time (hereinafter referred to as 'effective time') for. That is, since the PSS 110 has moved from the first paging area 180 to the second paging area 182, the location information stored in the PSS 110 may include a second paging group ID, a first paging group ID, and an effective time. Becomes In addition, the PSS 110 transmits the location information to the paging control server 170 when the location information update with the paging control server 170.

The first RAS 120 and the second RAS 122 are base stations of the portable Internet system, and wirelessly transmit packet data received from the ACR 130 to the PSS 110, and have a controller function and orthogonal frequency division multiple access. (OFDMA) / Time Division Duplex (TDD) packet scheduling and channel multiplexing function, MAC frame variable control function according to service characteristics and propagation environment, 50 Mbps high-speed traffic real-time control function, handover function and the like. In addition, the PSS 110, the first RAS 120 and the second RAS 122 includes a 50 Mbps packet transmission modulation and demodulation function, a high speed packet channel coding function, a real time modem control function, and the like for data transmission.

Hereinafter, for convenience of description, the PSS 110 moves from the first paging area 180 to the second paging area 182, and moves the first paging area 180 to the candidate paging group and the second paging area 182. ) Is the current paging group.

The RAS (120, 122) according to the preferred embodiment of the present invention receives the paging request signal from the paging control server 170, the PSS 110 of the first paging area 180 and the second paging area 182 In case of being in the border area, the first RAS 120 corresponding to the candidate paging group stores the PSS information for the paging time set for paging processing, and if the location information update occurs from the PSS 110 within the paging time, the PSS information is PSS. Send to 110, and connect the mobile Internet service. In addition, the first RAS 120 according to a preferred embodiment of the present invention deletes the stored PSS information when the paging time expires. Here, the paging request signal includes PSS information including information on a mobile identification number (MIN), a terminal serial number (ESN), and a service type of the PSS 110, and the subscriber's telephone number. It includes.

The ACR 130 is a base station controller of a portable Internet system. The ACR 130 accommodates a first RAS 120 and a second RAS 122, and connects a plurality of RASs or a plurality of RASs to the IP network 140. As an access router, handover control function between multiple RASs, handover function between multiple ACRs, handover function between base stations and multiple RASs of other networks (for example, CDMA 2000 network, WCDMA network, etc.), packet routing function, Internet access It has a function and the like, and is connected to the IP network 140.

In FIG. 1, only one ACR 130 is shown connected to the IP network 140, but in reality, a plurality of ACRs up to the Nth ACR (not shown) may be connected through the IP network 140, and each ACR may be connected. That is, the ACR 130 to the N-th ACR (not shown) are connected to a plurality of RASs, respectively, to control the RAS.

The IP network 140 is a backbone network for transmitting and receiving data in the portable Internet network, and includes a plurality of network equipment such as a router. In addition, the IP network 140 connects the ACR 130, the HA 150, the AAA 160, the paging control server 170, and the like, and delivers packet data from an external packet data service such as the Internet (not shown). Receive and transmit to the ACR (130).

The HA 150 refers to software that performs a function of routing a packet transmitted from the outside through an internet (not shown) and a hardware coupled thereto when using a mobile IP in a portable internet network. .

The AAA 160 refers to software that performs charging for the packet data used by the PSS 110 in conjunction with the ACR 130, and performs positioning on the PSS 110, and hardware coupled thereto.

Paging control server 170 according to a preferred embodiment of the present invention is a server for managing the paging of the PSS 110 in the idle mode, from the PSS 110 in accordance with the location information update procedure performed by the PSS (110) Store the location information including the current paging group ID received, the candidate paging group ID and the valid time for the candidate paging group, and check the location information and the elapsed time for the PSS 110 when the PSS 110 is called. When the PSS 110 is in a boundary area between the first paging area 180 and the second paging area 182, the PSS 110 transmits a paging request signal to the RAS 120 and 122.

2 is a flowchart illustrating a method of paging a personal subscriber station (PSS) located at a border area of a paging area in a portable Internet according to a preferred embodiment of the present invention.

Referring to FIG. 2, if the PSS 110 moves from the first paging area 180 to the second paging area 182 to perform a location information update procedure, the paging control server 170 may execute the PSS 110. From the position information of the PSS 110 including the current paging group ID, candidate paging group ID, the valid time (hereinafter referred to as 'terminal location information') from the (S210).

The paging control server 170 receiving the terminal location information stores the time when the PSS 110 performs the location information update procedure in the memory provided with the received location information (S220).

In this case, a case in which a call request comes to the PSS 110, such as the need to page the PSS 110 may occur (230).

When the case where the PSS 110 needs to be paging occurs, the paging control server 170 checks the stored terminal location information and checks the elapsed time to determine the location of the PSS 110 (S240). Here, the elapsed time refers to a time obtained by subtracting an update time from a paging request time for paging the PSS 110. That is, "elapsed time = paging request time-update time".

After checking the location information and the elapsed time, the paging control server 170 checks whether the valid time is greater than the elapsed time by comparing the valid time included in the location information with the aforementioned elapsed time (S250).

If the valid time is less than or equal to the elapsed time in step S250, the paging control server 170 determines that the PSS 110 is still located in the current paging group ID and requests paging of the PSS 110 to the current paging group (S252). ).

If the valid time is greater than the elapsed time in step S250, the paging control server 170 cannot guarantee that the PSS 110 is still located in the current paging group ID and requests paging for both the current paging group and the candidate paging group (S260). ).

3 is a flowchart illustrating a method of paging a personal subscriber station by a wireless access device in a candidate paging area in a portable Internet according to a preferred embodiment of the present invention.

The radio access station (RAS: 120) is set to a paging time (S310). Here, the paging time refers to the time at which the RAS 120, 122 stores the PSS information. If the location information update does not occur within the paging time, the RAS 120, 122 deletes the PSS information.

The RAS 120, 122 receives a paging request signal from the paging control server 170 (S320). Here, the paging request signal includes PSS information including information on a mobile identification number (MIN), a terminal serial number (ESN), and a service type of the PSS 110, and the subscriber's telephone number. It includes.

The RAS 120 moves the PSS 110 from the first paging area 180 to the second paging area 182, and the PSS information in the first paging area 180, which is a candidate paging group, according to the received paging request signal. Store the (S330).

When the PSS 110 moves from the first paging area 180 to the second paging area 182, the PSS 110 performs location information update with the paging control server 170 to perform a current paging group ID, a candidate paging group ID, and a candidate paging group. Storing location information including a valid time (hereinafter referred to as 'effective time') for the RAS (120, 122) whether the location information update has occurred between the PSS 110 and the paging control server 170; Determine (S340).

When location information update occurs between the PSS 110 and the paging control server 170 in step S340, the RAS (120, 122) transmits the PSS information to the PSS 110, and connects the portable Internet service (S350).

If the location information update does not occur between the PSS 110 and the paging control server 170 in step S340, the RAS (120, 122) determines whether the set paging time has expired (S342).

If the paging time has expired in step S342, the RAS 120, 122 deletes the PSS information (S344), and if the paging time has not expired in step S342, the process returns to step S340 and the PSS 110 and the paging control server 170. It is determined whether the location information update has occurred in between.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, when it is determined that the PSS is in a boundary region, the mobile device provides a mobile Internet service as soon as the paging group is currently paged and the candidate paging group stores the PSS information and receives the location information update of the PSS. By doing so, there is an effect of reducing service failure and service delay.

Claims (12)

Personal Subscriber Station (PSS), which stores location information including the current paging group ID, candidate paging group ID, and valid time for the candidate paging group (hereinafter referred to as 'effective time'). ), Handover function, packet routing function, ACR performing Internet access function, IP network performing data transmission and reception, HA performing routing function of forwarded packet, and AAA performing charging for packet data. In a system that A paging control server that stores the location information received from the PSS and transmits a paging request signal according to a location information update procedure performed by the PSS; And A radio access device for receiving the paging request signal from the paging control server and storing PSS information in a candidate paging group according to the paging request signal (RAS: Radio Access Station, hereinafter referred to as RAS) System for paging the PSS located in the border region comprising a. The method of claim 1, And the PSS transmits the location information to the paging control server when the location information update is performed with the paging control server. The method of claim 1, The paging request signal includes a subscriber's telephone number, PSS information including information on a mobile identification number (MIN), a terminal serial number (ESN), and a service type of the PSS. A system for paging a PSS located at a boundary area. The method of claim 1, The RAS stores the PSS information during a paging time set for paging processing in the candidate paging group, and transmits the PSS information to the PSS when the location information update occurs from the PSS within the paging time. System for paging the PSS located in the border region, characterized in that for connecting. The method of claim 1, And the RAS deletes the stored PSS information when the paging time expires. A personal subscriber station (PSS) (hereinafter referred to as a "PSS") that receives a portable Internet service and performs data communication by accessing the wireless Internet while on the move, a portable Internet network providing the portable Internet service, and the PSS In a system comprising a paging control server for controlling paging, the method for paging the PSS located in the boundary region of the first and second paging area, (a) performing location information update in the PSS to receive location information including a current paging group ID, a candidate paging group ID, and a valid time from the PSS; (b) storing terminal location information including the update time and the location information which is a time at which the location information update is performed; (c) checking the valid time and the elapsed time when the PSS needs to be paged to determine whether the valid time is greater than the elapsed time; And (d) transmitting a paging request signal to a paging group of the current paging group ID and a paging group of the candidate paging group ID when the valid time is greater than the elapsed time as confirmed in the step (c). How to page the PSS located in the boundary region comprising a. The method of claim 6, wherein the method is After step (d) above, (e) transmitting a paging request signal to the paging group of the current paging group ID when the valid time is less than or equal to the elapsed time as confirmed in the step (c). The method of paging the PSS located in the border region, characterized in that it further comprises. The method of claim 6, The elapsed time is a paging request time for paging the PSS subtracted from the location information update time, the method of paging the PSS located in the border region, characterized in that. A radio access station (RAS: Radio Access Station) that receives a paging request signal from a paging control server and stores PSS information according to the received paging request signal when the valid time in the paging group of the candidate paging group ID is greater than the elapsed time. In the following, "RAS" paging method), (a) setting a paging time indicating a time for storing the PSS information; (b) storing PSS information according to the paging request signal received from the paging control server; (c) determining whether the location information update has occurred between the PSS and the paging control server; And (d) when the location information update occurs between the PSS and the paging control server in step (c), transmitting the PSS information to the PSS and connecting a portable Internet service; The method of paging the PSS RAS of the candidate paging area comprising a. The method of claim 9, The paging request signal includes the PSS information including information about a subscriber's telephone number, a mobile identification number (MIN), a terminal serial number (ESN), and a service type of the PSS. Characterized by the RAS of the candidate paging area paging the PSS. The method of claim 9, After step (d) above, and (e) determining whether the set paging time has expired when the location information update does not occur between the PSS and the paging control server in step (c). How RAS Pages PSS. The method of claim 11, wherein the method is and (f) deleting the PSS information when the paging time expires in step (e).

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