KR0126576B1 - Method for searching mobile subscribery in a mobile communications exchange - Google Patents

Abstract

Mobile subscriber search of mobile communication exchanger is done as the following steps. (a) If the flag is set due to the abnormal procedure by searching subscriber information regularly using the first means, then internal data of the third means by accepting the search request from the first means is renewed and the mobile subscriber search using the multiple ASP(Access Switching Processor) is requested. (b) While conducting the call, the second means asked the LR(Location Register) for the subscriber information receive the mobile subscriber search request from the LR and then send it to the third means. Then the third means renews the internal data and send the mobile subscriber search request out to all location regions. (c) The third means checks the subscriber status and flag by receiving the incoming paging response from the mobile terminal equipment and conduct the response for the call and the mobile subscriber search result at the same time.

Description

Mobile subscriber search method in mobile communication switch

1 is a structural diagram of a mobile communication switch to which the present invention is applied.

2 is a process diagram of processing a mobile subscriber search function by the MPC according to the present invention.

3 is a flowchart of receiving and processing a mobile subscriber discovery request from an LR utility processing block.

4 is a flowchart of receiving and processing a mobile subscriber discovery request from a control block during call processing.

5 is a flowchart in which an MPC according to the present invention receives an incoming paging response and simultaneously performs a paging process and a search request.

* Explanation of symbols for main parts of the drawings

11: access switching subsystem (ASS),

12: Interconnection Network Subsystem (INS),

13: Central Control Sub-system (CCS),

14: Administration and Maintenance Subsystem (AMS),

15: Location Register Subsystem (LRS),

16: access switching processor (ASP),

17: Number Translation Processor (NTP),

18: Location Register Data Processor (LRDP),

19: Mobile Subscriber Signaling Access (MSA) block,

1a: Mobile Call Control (MCC) block,

1b: Mobile Paging Control (MPC) block,

1c: Location Register Utilities (LRU) block.

The present invention relates to a method for searching for a mobile subscriber in a mobile communication switch. In particular, the present invention reduces a data amount by managing a subscriber state and a flag to simultaneously process a mobile subscriber search function and a paging process. It's about how you can do two things at once.

One of the functions of the mobile communication switching network, the mobile subscriber search function (MS) is one of functions for recovering subscriber data if it is infringed by a malfunction of the location register (LR) that stores the subscriber data. A function of retrieving and recovering the LR by receiving data stored in the terminal, the mobile subscriber discovery function may occur at the request of a block processing the LR utility or during call processing.

However, the conventional mobile subscriber search function is performed on all terminals only when the system recovers from abnormal operation, and has a disadvantage in that call processing cannot be performed on unrecovered subscribers during call processing.

In order to solve this drawback, all the subscriber information must be restored before call processing, but this is not practical. Therefore, in order to provide a call to an unrecovered subscriber, the unrecovered subscriber should perform call processing and mobile subscriber search at the same time. It should be able to satisfy the function.

An object of the present invention is to provide a mobile subscriber discovery method in a mobile communication switch that can simultaneously perform a mobile subscriber search function and a search function during call processing according to subscriber state management. .

That is, in the present invention, when the LR managing location information periodically searches for subscriber information, and finds information set by the flag due to abnormal processing, and requests mobile subscriber search from the LRU block to recover the information. And, if the block in call processing receives the mobile subscriber search request from the LR provides a method for processing all of them.

In order to achieve the above object, in the present invention, a search flag for separating a mobile subscriber search function from a location register utilities (LRU) block and a search function performed during call processing by performing state management for each subscriber. ).

According to a feature of the invention, there is provided a mobile terminal comprising: first means for managing a location registration function of a mobile subscriber and subscriber location information such as location register (LR) data updates; Second means for establishing a call path according to the message and controlling a call between originating and called subscribers; The method of the present invention for searching for a mobile subscriber in a mobile communication switch comprising a third means for performing a number translation function, a routing function, and a called subscriber paging function periodically searches for subscriber information by the first means to perform abnormal processing. If a flag is found to be set, the search request is received from the first means, the internal data of the third means is updated, and the search of the mobile subscriber is requested to a plurality of ASPs to which the second means belongs. First step to do; If the second means receives the mobile subscriber search request from the LR during the call processing and receives the mobile subscriber search request from the LR, and sends the mobile subscriber search request to the third means, the third means updates the internal data and moves to all the location areas. Sending a search request; The third means receives the incoming paging response from the mobile terminal and checks the status and flag of the subscriber and processes the response for call processing and the mobile subscriber search result simultaneously. In this case, there may be only one first and second steps, or the first step may come after the second step comes on.

Hereinafter, with reference to the accompanying drawings will be described in detail the state management and call procedures according to the present invention.

1 is a diagram illustrating a structure of a TDX-10 mobile communication switch to which the present invention is applied, and includes three subsystems: an Access Switching Subsystem (ASS) 11, an Interconnection Network Subsystem (INS) 12, and a Central Control (CCS). Subsystem 13).

The ASS 11 is a sub-system which is configured with subscriber and relay line matching devices, time switches, various signaling devices, and the like to perform call processing functions.

The INS 12 is located in the center of the system and is responsible for the space switching function (Number Switching), Routing (Routing) and Paging (Space Switching) function to connect the ASS between each other.

The CCS 13 is composed of an AMS (Administration and Maintenance Subsystem) 14 and a Location Register Subsystem (LRS) 15. The AMS 14 is a system-wide operation management, maintenance, billing, and statistics function. And a storage system such as a hard disk, a storage device such as an input / output device, and the like, and the LRS 15 is a subsystem added to a mobile communication switch, and is a subsystem for managing location registration and subscriber information of a mobile subscriber.

The ASS 11 includes an Access Switching Processor (ASP) 16, and the ASP 16 includes a Mobile Subscriber Signaling Access (MSA) block 19 and a Mobile Call Control (MCC) block 1a. .

The MSA block 19 performs paging processing to the base station upon paging request, and performs a message conversion function to the exchange by serving as a signal interface between the base station and the switching center.

The MCC block 1a receives the message from the MSA block 19, sets up a call path, and controls the call until the subscriber releases the call through the called party.

The NTP (Number Translation Processor) 17 in the INS 12 performs the number translation function, routing function, and recipient paging function.

A mobile paging control (MPC) block 1b according to the present invention is mounted on the NTP 17, and the MPC block 1b manages a subscriber in a state of being idle, waiting for paging response, busy, searching for a mobile subscriber, and the like. By paging only the call in the idle state when the paging request, the service is faster.

In addition, since the MPC block 1b does not generate an instance and is processed by one process, the MPC block 1b manages by number to distinguish subscribers, and separately manages a call state required during a call and a state for a mobile subscriber search function. If both occur at the same time, the call is prioritized and the search flag is managed.

The Location Register Subsystem (LRS) 15 includes a Location Register Data Processor (LRDP) 18. The LRDP 18 stores subscriber location information and subscriber data.

The LRDP 18 is provided with a Location Register Utilities (LRU) block 1c for driving the MPC block 1b according to the present invention. The LRDP 18 searches for a flag of the LR and requests a mobile subscriber search function.

2 is a process diagram of processing a mobile subscriber search function by the MPC according to the present invention.

There are two mobile subscriber discovery request procedures, as required by the LRU block 1c that provides the utility of the LR, as in the first stage of FIG. 2, and during call processing, as in the second stage of FIG. There may be requests from the LR for the LR approach.

In the paging process, which is a function of calling the called party, paging process is performed according to the location information by carrying the called party location information and terminal characteristics, while the mobile subscriber search performs paging to all areas with the subscriber number.

When there is a mobile subscriber search request from the LRU block 1c, referring to the first step of FIG. 2, the search request from the LRU block 1c is received and the internal data is updated (21). It then sends a mobile subscriber's search request signal to the MSA block 19 in all ASP 16 (22). In this case, the internal data update mainly refers to managing subscriber status and discovery flag, which will be described with reference to FIG.

When a mobile subscriber search request occurs during call processing, referring to the second step of FIG. 2, when accessing LR data 23 in the MCC block 1a, which is the call control block of the calling party, the data is abnormal. If the flag is set, the mobile subscriber search request is received (24).

Then, when the mobile subscriber search request is made from the MCC block 1a of the subscriber end to the MPC block 1b according to the present invention (25), the MPC block 1b sets internal data and moves to all location areas. (26).

Subsequently, when there is a response from the subscriber end, referring to step 3 of FIG. 2, if there is an incoming paging response from the MCC block 1a, the receiver receives the paging response and updates the internal data (27). If the state is a mobile subscriber discovery state, a response message for the mobile subscriber discovery request is sent to the LRU block 1c (28), and if the subscriber state is waiting for a paging response during call processing, a paging response is sent (29) to the originating MCC block. At this time, if both are set, they are processed respectively.

In the third step, when there is an incoming paging response from the generated MCC block 1a when there is a response from the subscriber end (29), in this block, the subscriber state and the flag setting are determined to determine whether the subscriber is in process. If it is a response, it sends a paging response to the originating MCC block 1a, which is the call control block, and sends a mobile subscriber search response to the LRU block 1c if a flag is additionally set.

3 is a flowchart of receiving and processing a mobile subscriber discovery request from the LRU block 1c in the first step of FIG.

Referring to FIG. 3, first, a mobile subscriber discovery request is received from the LRU block 1c (31).

At this time, the information obtained from the LRU block 1c is only the number of the corresponding subscriber, and since there is no location area information, it is necessary to send paging to all areas to find the mobile subscriber. Therefore, the MPC block 1b receives the subscriber number from the LRU block 1c and searches for internal data using the subscriber number as an index (33).

Next, it checks whether the subscriber's link exists (34), and if it turns out to be present, examines the subscriber's status (35).

If the status of the subscriber is found to be waiting for paging response, it means that there has already been a call request from the MCC block. That is, the second step of FIG. 2 has been performed or is being called. In this case, the subscriber's state is maintained and call processing is continued, and a search flag is set to indicate that there is a mobile subscriber search request, and a response is received when an incoming response is received (36).

On the other hand, if the link exists but the subscriber's status is found to be in a busy state, the occupancy notification is sent (37). It cannot be occupied, such as during call processing, so it must be requested again.

If the link does not exist or the subscriber status is found to be dormant, a mobile subscriber search request is sent to all ASPs 16 in the exchange to find the mobile subscriber (38).

Thereafter, the state of the subscriber is maintained in the search state (39).

4 is a flowchart illustrating a process of processing the MPC block 1b according to the present invention after receiving the mobile subscriber search request from the subscriber end in the second step of FIG.

Referring to FIG. 4, when the mobile subscriber search request is received during call processing, when the MCC block 1a, which is a call control block, queries the LR for subscriber information, the LR searches for subscribers in the unrecovered state of the data. When sending a request, the MCC block 1a sends a mobile subscriber search request to the MPC block 1b upon receiving the mobile subscriber search request from the LR instead of the subscriber information (41). In this case, the MPC block 1b must process both the called subscriber paging process for call processing and the response message for data recovery of the LR. Therefore, the MPC block 1b must manage the flag at the same time as the call state change. Therefore, upon receiving the request 41, the subscriber number is received (42), and the internal data is searched (43) using the subscriber number as an index to check whether there is a link of the subscriber (44).

If the link is found to exist, the subscriber's status is checked (45).

If the status of the subscriber is found to be occupied, it is processed in the same manner as the call processing procedure and asks the call control block whether the call is occupied (46). This is to see if the data is inconsistent.

If the subscriber's status is found to be in a paging response wait state, the subscriber handles and ends the call in the same manner as the call processing procedure (47).

On the other hand, if the state of the subscriber is found to be the mobile subscriber discovery state, since the first step of FIG. 2 is performed first, call processing must be performed at the same time. After sending (48), the subscriber's state is set to the paging response waiting state (49).

In addition, if the link does not exist or the status of the subscriber is found to be idle, only call processing is performed, so that the mobile subscriber search request is sent to all ASPs in the same manner as the call processing procedure (48), and the status of the subscriber is waited for paging response. Set to state (49).

5 is a flowchart illustrating a process of processing an MPC block 1b according to the present invention after receiving an incoming paging response after passing one or more of the first and second steps of FIG.

Referring to FIG. 5, a paging response is received from the called party end (51).

By searching the internal data using the subscriber's number as an index, the subscriber's link is searched (52), and it is checked whether or not the link exists (53).

If the link is found to exist, the subscriber's status is examined (54).

If the status of the subscriber is found to be waiting for a paging response, since this is the case previously requested by the MCC block 1a, which is a call control block, the incoming information is stored (55), and the incoming information is sent to the calling party (56). .

At this time, it is checked whether the discovery flag is set (57), and if it is found that the discovery flag is set, the response to the mobile subscriber discovery is sent to the LRU block 1c (58).

If the status of the subscriber is found to be in the mobile subscriber discovery state, it sends a response to the mobile subscriber discovery to the LRU block 1c (59).

If the link does not exist or the subscriber's status is found to be idle, the call is already disconnected and is ignored (60).

As described in detail above, according to the present invention, the amount of data is reduced and the mobile subscriber search function and the paging process function are managed at once by managing the subscriber state and the flag so as to simultaneously process the mobile subscriber search function and the paging processing procedure. To be handled.

Claims (4)

First means 15 for managing a location registration function of the mobile subscriber and subscriber location information such as location register (LR) data updates; Second means 16 for establishing a call path according to the message and controlling a call between the originating and called party; A method for searching for a mobile subscriber in a mobile communication switch comprising a third means (17) for performing a number translation function, routing function, and called subscriber paging function, wherein the first means periodically searches for subscriber information and performs abnormality. If the flag is found to be set by the processing, the search request is received from the first means to update the internal data of the third means (21), and the plurality of access switching processors (ASPs) to which the second means belongs. A first step of requesting (22) discovery of a mobile subscriber; During the call processing, if the second means receives a mobile subscriber search request from the location register LR to the location register LR and sends the mobile subscriber search request to the third means, the third means sends the internal data. Updating and sending a mobile subscriber search request to all location areas; And a third step in which the third means receives the incoming paging response from the mobile terminal, checks the status and the flag of the subscriber, and simultaneously processes the response for call processing and the mobile subscriber search result. Mobile subscriber discovery method. 2. The method according to claim 1, wherein the first step comprises the steps 31 and 32 of receiving a mobile subscriber search request from the first means and obtaining a subscriber number from the first means, and using the subscriber number as an index. Searching 33, checking if the link of the subscriber exists, and checking the status of the subscriber if it is found (34, 35), and determining the status of the subscriber is waiting for paging response. And if the link is present but the subscriber's status is found to be in a busy state (36), the subscriber's status is maintained and the search flag is set and then responded to the request of the first means. Step 37, and if the link does not exist or the subscriber state is found to be idle, then all access switching processors (ASPs) in the exchange are Requiring color and 38, the mobile subscriber of the mobile navigation method in a communication switch, characterized in that it comprises a step (39) for holding the status of a subscriber to a mobile subscriber navigation state. The mobile subscriber search according to claim 1, wherein the second step is performed when the subscriber information needs to be restored due to an abnormal state of the location register LR when the second means makes a subscriber information request to the location register LR. Receiving a request, and the second means sending a mobile subscriber search request with a subscriber number (41, 42); searching for internal data using the subscriber number as an index and investigating whether a link of the subscriber exists; (43,44), if the link is found to be present, checking the state of the subscriber (45); if the state of the subscriber is found to be in a call, asking the subscriber whether it is occupied, such as a call processing procedure. Step 46, if the status of the subscriber is found to be in a paging response wait state, step 47 of taking the occupancy process and ending the call; and the link does not exist or the status of the subscriber is idle. Sending a mobile subscriber discovery request to all access switching processors (ASPs), setting the subscriber's status to wait for paging response (48, 49), and if the link is present and the subscriber's status is mobile subscriber discovery. If found to be in a state, setting the discovery flag (50), sending a discovery request to all access switching processors (ASPs) (48), and setting the subscriber state to wait for paging response (49). A mobile subscriber discovery method in a mobile communication switch. The method as claimed in any one of claims 1 to 3, wherein the third step is, when receiving the paging response by the second means of the called party, looking for the subscriber's link and checking whether the link exists (51). 52, 53), if the link is found to be present, step 54 of investigating the status of the subscriber; and if the status of the subscriber is found to be waiting for a paging response, the incoming information is stored and then called at the calling party. Sending information (55, 56), checking whether the search flag is set, and if the search flag is found to be set, sending (57, 58) a response to the mobile subscriber search to the first means; If the status of the subscriber is found to be mobile subscriber discovery, sending a response to the mobile subscriber discovery to the first means (59); if the link does not exist or the status of the subscriber is found to be idle,And a step (60) of determining that the call processing has already been completed and ignoring the mobile subscriber station.