KR20030056140A - Method for controlling hand-off using the beacon signal in roaming boundary area - Google Patents

Abstract

PURPOSE: A method for realizing a hand-off using a beacon signal at a roaming boundary area is provided to secure the hand-off of a terminal of other service network at the roaming boundary area and optimally operate FA operation at a base station of a roaming area. CONSTITUTION: A local network base station A(110) and another network base station(120) assign channels to subscriber groups at a non-roaming area for executing a call process, a hand-off, and a position registration. A local network base station B(130) and a local network base station C(140) assign channels to mobile stations of subscriber groups at a roaming area for executing the call process, the hand-off, and the position registration. The local network base station B more contains a beacon FA(Frequency Allocation) as well as the existing traffic FA for the hand-off of the mobile station moving from the non-roaming area to the roaming area. The local network base station B receives a hand-off request from a base station controller, and assigns the mobile station moving to the roaming area to the beacon FA before executing the hand-off to the local network base station C.

Description

Method for controlling hand-off using the beacon signal in roaming boundary area}

The present invention relates to a method for implementing a handoff using a beacon signal in a roaming boundary region, and more particularly, a method for implementing a handoff using a beacon signal in a roaming boundary region to ensure handoff of another operator's communication terminal in a roaming boundary region. And a computer readable recording medium having recorded thereon a program for realizing the method.

In the general CDMA system, the number of FAs between base stations varies even in the downtown and the outskirts or the same downtown area due to the expansion of FAs due to the increase in subscribers. Therefore, in order to induce a smooth handoff between a multi-frequency base station, an outside small FA base station and a downtown small FA base station, a pilot beacon scheme in which only a pilot signal is accommodated by a frequency method without a traffic channel is used.

Also, recently, the second generation mobile communication system based on IS-95 (hereinafter referred to as "2G system") and the second generation mobile communication system based on CDMA 2000 1X (hereinafter referred to as "2.5G system") We are using this beacon signal for hard handoff.

That is, the beacon signal is used to allow the terminal to continuously perform a call without a call disconnection when the 2.5G terminal moves from the 2.5G service area to the 2G service area. Typically, 2G base stations use a beacon signal of 873.33 MHz for 111 channels, and the time compensator used in the repeater has a filter that passes only a specific frequency.

In addition, a roaming service is required for an operator operating a mobile communication network to accommodate a terminal joined to another operator's network. For the loading service, an FA should be increased in the operation of a roamable base station, but simply roaming. Many FAs can't operate indefinitely.

Therefore, in recent years, there has been a demand for a handoff scheme in a service area for performing roaming services while optimizing an operational FA.

Accordingly, the present invention has been devised to meet the above-described demands, and guarantees handoff of terminals of other service networks in roaming boundary regions, and optimally operates FA in roaming region base stations through beacon signals. An object of the present invention is to provide a method of implementing a handoff using a beacon signal in a roaming boundary region and a computer readable recording medium recording a program for realizing the method.

1 is an exemplary configuration diagram illustrating a handoff implementation process in a roaming boundary region to which the present invention is applied.

2 is a flowchart of a first embodiment of a method for implementing handoff using a beacon signal in a roaming boundary area according to the present invention;

3 is a flowchart of a second embodiment of a method for implementing handoff using a beacon signal in a roaming boundary area according to the present invention;

※ Explanation of code for main part of drawing

110: A network base station 120: other network base station

130: B-network base station 140: C-network base station

In order to achieve the above object, the present invention provides a handoff method using a beacon signal in a roaming boundary area, wherein a mobile station of another service network moving from a non-roaming area to a roaming area maintains a call through a beacon FA. A first step of handing off to another roaming base station after switching to the traffic FA; And performing a handoff of the mobile station of the other service network moving from the roaming area to the non-roaming area to its service network base station in the non-loading area through the traffic FA, and performing handoff to the service network to which the mobile station is subscribed at the end of the call. Characterized in that it comprises two steps.

Meanwhile, the present invention provides a mobile communication system having a processor to implement a handoff using a beacon signal in a roaming boundary area, and transmits a mobile station of another service network moving from a non-roaming area to a roaming area through a beacon FA. A first function of holding a call and handing off to another roaming base station after switching to a traffic FA; And performing a handoff of the mobile station of the other service network moving from the roaming area to the non-roaming area to its service network base station in the non-loading area through the traffic FA, and performing handoff to the service network to which the mobile station is subscribed at the end of the call. A computer readable recording medium having recorded thereon a program for realizing the functions is provided.

Hereinafter, a preferred embodiment of a handoff implementation method using a beacon signal in a roaming boundary area according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exemplary configuration diagram illustrating a handoff implementation process in a roaming boundary region to which the present invention is applied, and is illustrated as a handoff process from a non-roaming region to a roaming region.

As shown in FIG. 1, in the network diagram, reference numeral 110 denotes an A-network base station, 120 denotes another network base station, 130 denotes a B-network base station accommodating a beacon FA for roaming, and 140 denotes a C-network base station. .

Here, the self network base station refers to a base station operating in a network for performing a mobile communication service for a group of G1 subscribers, and the other network base station refers to a base station operating in a network for performing a mobile communication service for a group of G2 subscribers.

The A-network base station 110 and the other network base station 120 allocates channels to their subscriber groups in the non-roaming area, respectively, to perform call processing, handoff, and location registration.

The B-network base station 130 and the C-network base station 140 allocates a channel to a mobile station of its subscriber group in a roaming area to perform call processing, handoff and location registration. In particular, the B-network base station 130 In addition to existing traffic FAs, beacon FAs are being further accommodated for handoff of mobile stations moving from non-roaming regions to roaming regions.

Accordingly, the B-network base station 130 receives a handoff request from the base station controller, assigns a mobile station moving to the roaming area to the beacon FA, and then performs handoff to the C-network base station 140 after switching to the traffic FA.

2 is a flowchart of a first embodiment for explaining a handoff implementation method using a beacon signal in a roaming boundary area according to the present invention.

As shown in FIG. 2, if the A-network base station 110 in the non-roaming region operates 1 FA and 2 FA, and the other network base station 120 in the non-roaming region operates 1 FA ′ and 2 FA ′. The C-network base station 130 for handing off the mobile station moving from the non-roaming area to the roaming area further includes a beacon FA for accommodating the mobile station allocated through the other base station 120 to the existing traffic FA capacity. do.

In addition, the B-network base station 130 has a beacon FA by the FA as far as the FA difference with the A-network base station 110 in the non-loading region.

Therefore, when the mobile station which is assigned to 1 FA 'and 2 FA' to the other network base station 120 in the non-roaming area and performs the call processing moves to the roaming area, the B-network base station 130 receives the 1 FA 'that it receives. The call of the mobile station is maintained through the beacon and the 2 FA 'beacons, and handoff is performed to another C-network base station 140 after switching to the traffic FA (1 FA).

In addition, when a mobile station assigned to 1 FA and 2 FA in a non-roaming area and performing a call processing moves to a roaming area, the B-network base station 130 receives 1 FA beacons and 2 that it receives. The mobile station maintains the call through the FA beacon, and performs handoff to another C local base station 140 after switching to the traffic FA (1 FA).

3 is a flowchart illustrating a handoff implementation method using a beacon signal in a roaming boundary area according to the present invention, and shows a handoff process from a roaming area to a non-roaming area.

As shown in FIG. 3, the A-network base station 110 in the non-roaming region operates 1 FA and 2 FA, and the other network base station 120 in the non-roaming region operates 1 FA ′ and 2 FA ′. The C-network base station 130 for handing off the mobile station moving from the roaming area to the non-roaming area further includes a beacon FA for accommodating the mobile station allocated through the other base station 120 to the existing traffic FA capacity. do.

In addition, the B domestic base station 130 is provided with a beacon FA by the FA as much as the FA difference with the A-network base station 110 in the non-loading region.

Accordingly, when the mobile station (meaning both the G1 mobile station and the G2 mobile station) assigned to the C-network base station 130 in the roaming area and performing call processing moves to the non-roaming area, the A-network base station in the non-roaming area ( Assigned to l FA of 110) and handed off.

In particular, when the mobile station, which is another network service subscriber, hands off to the A-network base station 110 in a non-roaming area, maintains a call and receives a service, and terminates the call, the mobile station moves to the other network base station 120 which is the corresponding service network. You will be assigned 1 FA '.

In this case, the connection from the other network base station 120 in the A-network base station 110 is performed by a service redirection message (SRM), therefore, a separate beacon signal for handoff is not required.

As mentioned above, preferred embodiments of the present invention are disclosed for the purpose of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

The handoff implementation method using beacon signals in the roaming boundary area as described above, wherein the local base station of the roaming area receives the beacon FA to accommodate the subscribers of the other service network together with the traffic FA, and then the other service network in the roaming boundary area. It is a useful invention that can guarantee the handoff of the terminal and optimally operate the FA operation in the base station in the roaming region through the beacon signal.

Claims (3)

A method for implementing handoff using a beacon signal in a roaming boundary region, A first step of maintaining a call through a beacon FA of a mobile station of another service network moving from a non-roaming area to a roaming area, and handing off to another roaming base station after switching to a traffic FA; And Performing a handoff of the mobile station of the other service network moving from the roaming area to the non-roaming area to its service network base station in the non-loading area through the traffic FA, and performing a handoff to the service network to which the mobile station is subscribed at the end of the call; step Handoff implementation method using a beacon signal in a roaming boundary region comprising a. The method of claim 1, In the second step, the handoff to the subscribed service network is carried out by a service redirection message (SRM) characterized in that the handoff implementation method using the beacon signal in the roaming boundary region. In a mobile communication system having a processor to implement a handoff using a beacon signal in a roaming boundary region, A first function of maintaining a call through a beacon FA of a mobile station of another service network moving from a non-roaming region to a roaming region, and handing off to another roaming base station after switching to a traffic FA; And Performing a handoff of the mobile station of the other service network moving from the roaming area to the non-roaming area to its service network base station in the non-loading area through the traffic FA, and performing a handoff to the service network to which the mobile station is subscribed at the end of the call; function A computer-readable recording medium having recorded thereon a program for realizing this.