KR100335145B1 - Call Setup Method in Radio Communication System - Google Patents

Abstract

The present invention relates to a call setup method in a mobile communication system capable of sequentially attempting a call connection from a subscriber closest to a configuration number in a specific group using location information of a subscriber managed in a mobile communication system. . The present invention comprises the steps of transmitting the location information of the calling party subscriber to any switching center that the calling party will request call establishment; Acquiring each location information of called party subscribers inside the switching center requested to set up the call; Calculating call setup priorities according to adjacent distances between the calling party and the called party subscribers using the obtained location information of the called party subscribers; Comparing neighboring information between each called party subscriber and the calling party subscriber according to the calculation result; And selecting the subscriber located at the closest distance according to the comparison result to transmit the incoming information required for call setup, thereby implementing a service that enables a call between the current originating location and the member located at the closest distance. There is an effect that can be useful in a wide variety of social areas, such as emergency rescue, police contacts and distribution delivery.

Description

Call setup method in mobile communication system

The present invention relates to a call setup method in a mobile communication system capable of sequentially attempting a call connection from the closest configuration number to a configuration number in a specific group using location information of a subscriber managed in the mobile communication system. .

In general, the same conventional technology as the present invention does not exist, and as a similar function, there is a mobile subscriber access tracking function (abbreviated as MAH) defined in TIA / EIA / IS-53A.

The mobile subscriber access tracking function (MAH) is a function that attempts to set up a call by finding a member who can set up an incoming call in idle state by attempting an outgoing call with a calling number.

That is, the members in the group are tracked in a predetermined order, and in the case of a call setup failure such as Busy, Inactive, or Fails to Respond to a paging request, the members are tracked in the following order. .

In order for the mobile subscriber to use the mobile subscriber access tracking function, the following operations of the group members should be performed.

A mobile switching center (MSC) that performs outgoing call setting from the representative number of the mobile subscriber access tracking function (MAH) to the called number sends a location information request message to the home location register (HLR) for the mobile subscriber access tracking function (MAH) representative number. Send and receive a response message. The home location register (HLR) recognizes that the received destination number is a representative number of the mobile subscriber access tracking function (MAH) and includes the destination routing information for the first destination address in the location information response message according to a preset order in the group. Done. Important recipient subscriber information transmitted at this time includes a termination list, a called subscriber profile, and a trigger profile.

Accordingly, according to the incoming information transmitted from the home location register (HLR), the MSC performs the process of proceeding and connecting in the outgoing call setup and when the member of the subscriber network is busy (Busy), the paging is not answered (Fails). To respond to a paging request, the new location information is requested to the home location register (HLR) for each call establishment failure situation, such as a case of No answer alerting.

However, such a conventional call establishment method tracks only the members in a specific group performing the same purpose in order according to the pre-registered order as described above, so that the members in the closest distance are not received at the highest priority. Since there is a problem that can not provide a convenient service according to the quick call setup.

In addition, there is a problem that can not perform a quick call connection required in the industry of a special field that needs to make an emergency call because it is unable to perform a quick call connection with the subscriber member of the nearest location.

The present invention has been made in view of the above-mentioned problems of the prior art, and sequentially using a subscriber located in the closest distance to the configuration numbers in a specific group using location information of a subscriber managed in a mobile communication system. An object of the present invention is to provide a call setup method in a mobile communication system capable of attempting a connection.

The present invention comprises the steps of transmitting the location information of the calling party subscriber to any switching center that the calling party will request call establishment; Acquiring each location information of called party subscribers inside the switching center requested to set up the call; Calculating call setup priorities according to adjacent distances between the calling party and the called party subscribers using the obtained location information of the called party subscribers; Comparing neighboring information between each called party subscriber and the calling party subscriber according to the calculation result; According to the comparison result, the subscriber located at the shortest distance is selected to transmit the incoming information necessary for call setup.

Preferably, the location information of the calling party subscriber includes MSC information and location area identification information to which the calling party belongs.

1 is a diagram illustrating a subscriber location registration procedure when the location of a mobile terminal is changed.

2 is a diagram showing shape information of a mobile switching center (MSC) constructed in a tree structure for each adjacent distance in each home position register (HLR) in a mobile communication network.

FIG. 3 is a diagram detailing the tree structure according to the proximity distance between originating subscribers between MSCs shown in FIG. 2; FIG.

FIG. 4 is a diagram showing the location area identification information (LAI) of each MSC ID shown in FIG. 3 in a tree structure based on a distance difference from an originating subscriber.

5 is a flowchart illustrating a procedure for searching an originating subscriber and a subscriber located closest to each other according to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

The present invention is an idea of a new concept of additional service that can be used for a special purpose by using the location information stored in the subscriber profile of the home location register (HLR) in the location registration process performed at the time of changing the location of the mobile terminal To provide. That is, when a mobile subscriber attempts to set up a call with a representative number of a group by grouping subscriber numbers of a specific field having the same purpose, the call is sequentially connected in the order of the number located closest to the calling mobile subscriber in the group. By doing this, we can implement useful services in areas where the concept of distance is important.

The present invention is based on the known mobile subscriber access tracking function (MAH) service based on the basic operation of the short-range priority call connection service in the mobile communication network and from the mobile switching center (MSC) to the home location register (HLR) for the group representative number When the incoming information is requested, the method of transmitting the location information of the originating subscriber and the method of tracking the originating subscriber and the nearest member among members in a specific group stored in the database of the home location register (HLR) are used.

The home location register (HLR) refers to a database in a mobile communication network that manages location information and subscriber level information for providing a service located at a fixed point in a mobile communication network.

In contrast to the prior art described above, the subscriber access tracking function (MAH) is sequentially tracked by a subscriber or mobile operator in a predetermined order, while the short-range priority call connection service is a group member (terminal). The priority is dynamically changed by the location information which is actually located, and it is tracked in order from the member of the shortest distance by the priority at the time of providing the service.

In order to implement the present invention, the following additional operations are required.

The MSC which carries out the call setup procedure from the near field priority call connection representative number to the called number transmits a LOCREQ message to the home location register (hereinafter abbreviated as HLR) for the representative number.

In addition to the parameters defined in IS-41C, the LOCREQ message shall add the location information of the originating subscriber (MSCID, LAI of the originating subscriber) transmitted to the MSC upon setup of the outgoing call setup request (SETUP). The location information of the calling subscriber is necessary for the HLR to determine the member located closest to the calling subscriber among the members of the group. The configuration of MSCID and location area identification information LAI to be added is as follows.

7 6 5 4 3 2 One 0 Octet Notes Unique ID by Telecom Service Provider One a 2 Switch number (SWNO) 3 b

In Table 1, a is a unique Market ID specified by the mobile communication service provider, and b is a specific of the switch resource, which is a process area corresponding to one call and a cell area combined together with a general market ID. Means a group.

7 6 5 4 3 2 One 0 Octet Notes ID of the region where you are located One a 2

A in Table 2 means a location area identifier designated by a mobile station.

1 is a diagram illustrating a subscriber location registration procedure when the location of a mobile terminal is changed.

Referring to FIG. 1, when a mobile terminal moves from a current subscriber area to another subscriber area in a mobile communication network environment, the changed location information is transmitted to the base station controller MSC, and the base station controller MSC changes the location information of the mobile terminal. Send the request to the mobile switching center (MSC).

The MSC sends the location change request to the Visited Location Register (hereinafter abbreviated as VLR) of the changed location.

The visited subscriber location register registers the changed location information of the mobile terminal, and then, through the location registration procedure, the mobile switching center ID (MSC) ID and the location area of the changed location to its home location register (HLR). A procedure of notifying a location area ID is performed.

At this time, the home location register (HLR) stores the location information of the mobile switching center (MSC) ID and location area identification information (LAI) in the subscriber database. Through this procedure, the home location register (HLR) keeps current location information of all subscribers in charge.

Using each of the stored location information, the home location register (HLR) constructs a location area (hereinafter referred to as LA) form of a wireless environment configured by a mobile operator to extract information located at the shortest distance between subscribers. Used to

2 is a diagram showing the shape information of a mobile switching center (MSC) constructed in a tree structure for each adjacent distance in each home position register (HLR) in a mobile communication network.

Referring to FIG. 2, each home position register (HLR) stores adjacent mobile switching center (MSC) IDs in a tree structure according to adjacent distances using adjacent mobile switching center (MSC) IDs as keys. The location area identification information (LAI) of each member located in the MSC ID is stored in a tree structure according to the adjacent distance.

FIG. 3 is a detailed diagram of a tree structure according to adjacent distances between MSCs shown in FIG. 2, and FIG. 4 is location area identification information LAI of each MSC ID shown in FIG. Is classified into a tree structure for each adjacent distance.

3 and 4, MSCs set as respective priority call connection groups are formed in a tree structure from an upper level to a lower level according to an adjacent distance (depth level). Priorities according to adjacent distances of adjacent mobile switching centers (MSCs) may be classified into different levels or equivalent levels for each location area.

In addition, as shown in FIG. 4, each MSC ID may be classified into equal levels according to the priority of the neighboring distance located closest to the originating subscriber. Each tree is formed at a higher or lower level by the difference in the proximity distance with the calling subscriber.

5 is a flowchart illustrating a procedure for searching a calling subscriber and a member located closest to each other according to the present invention.

Referring to FIG. 5, when a mobile originating subscriber attempts to set up a call with a local priority call connection group representative number, the home location register (HLR) is based on the originating subscriber's location information (MSCID, LAI). Search for the nearest member.

Therefore, when a mobile originating subscriber attempts to set up a call with a pilot number of a near field priority call connection group, the location information of the originating subscriber is transmitted through a call processor block to the originating MSCID. And the calling party location area identification information (LAI) (S51).

When the outgoing call is set, the member list in the outgoing call attempted connection group is extracted, and location information of an arbitrary member is obtained (S52).

If the location information of any member is secured, the tree structure is searched according to the difference in the distance between members located in the MSC, and the destination MSCID is determined based on the originating MSCID. The priority of the adjacent distance of the termination MSCID is calculated (S53).

The result of determining the termination MSCID according to the adjacent distance priority is compared with the originating MSCID to determine whether there is the same MSS (S54).

As a result of the comparison, if the value is not the same, it is determined whether the retrieved member is the finally retrieved member (S55), and if it is not the last member, according to the MSC adjacent distance of the terminating MSCID. The tree level is temporarily recorded and the process of extracting a new member list is repeated (S56).

However, when the originating MSCID and the terminating MSCID are the same, the originating MS in the location area identification information (LAI) tree structure shown in FIG. Based on the MSCID and the calling party location area identification information LAI, the difference between the tree levels Depth according to the location area adjacent distance of the called party location area identification information LAI is calculated (S57).

According to the calculation result, it is compared whether the called party location area identification information LAI is a value representing immediately adjacent information (Depth = 1) (S58).

As a result of the comparison, when the tree depth value according to the adjacent distance of the location area identification information (LAI) is 1, the position of this member is determined to be the shortest distance, and the destination information necessary for call setup is transmitted to the MSC. Then, the member is excluded from the extracted member list (S59).

However, if the tree depth value according to the called party's adjacent distance is not 1, after checking whether the compared member is the last member (S60), if the last member is not the last member, the destination MSCID is identified. New member list by temporarily recording the tree level (Depth = 0) value according to the MSC adjacent distance and the calculated tree level value according to the adjacent distance of the called party location area identification information (LAI) Repeat the process of extracting (S61).

On the other hand, in the case of the last member, the tree level according to the neighboring distance of the called party location area identification information (LAI) and the tree level (Depth) according to the adjoining distance of the MSCID of all the temporarily stored members. Depth is selected based on the most nearest member (S62).

That is, the member having the minimum value among the members having a tree value of zero according to the adjacent distance of the MSCID is selected as the member located at the nearest distance.

However, if there is no member that satisfies this search condition, the member having the smallest tree level according to the neighbor distance of the MSC ID may be selected, and the tree depth according to the neighbor distance may be selected. If all are the same, you can select any member.

Through all these processes, the home location register (HLR) performs the short-range priority call connection function of FIG. 5 even when the call setup fails due to a busy, paging-free or paging-free call, to extract the nearest member. By repeating the procedure, the members in the group can be tracked until the call is connected to a specific member.

According to the present invention mentioned above has the following effects.

In the present invention, by grouping subscribers having the same purpose, the mobile originating subscriber attempts to make a call to the representative number of the group, thereby implementing a service that enables a call between the current originating location and the member located closest to the emergency structure, There is an effect that can be useful in a wide variety of social fields, such as police contacts and distribution delivery.

In addition, in the present invention, it is possible to derive various additional services based on location information between mobile subscribers through limited ideas and methods, and through such services, it is possible to provide high profitability to mobile service providers and to provide communication convenience to mobile communication subscribers. There is.

Claims (2)

Transmitting the location information of the calling party to any switching center that the calling party will request to establish a call; Acquiring each location information of called party subscribers inside the switching center requested to set up the call; Calculating call setup priorities according to adjacent distances between the calling party and the called party subscribers using the obtained location information of the called party subscribers; Comparing neighboring information between each called party subscriber and the calling party subscriber according to the calculation result; And selecting the subscriber located at the shortest distance according to the comparison result and transmitting the incoming information necessary for call setup. 2. The method of claim 1, wherein the location information of the calling party subscriber includes mobile station information (MSC) information and location area identification information to which the calling party belongs.