KR20020068732A - The call release method in mobile communication system - Google Patents

Abstract

PURPOSE: A method for releasing a call in a mobile communication system is provided to perform an efficient call release process by simplifying state concept according to call release and introducing a response standby variable and retransmission concept. CONSTITUTION: A call release message is transmitted to an interworking block associated with call release(S110). A response standby variable of a corresponding block is set as true and a timer of the corresponding block is operated, and a retransmission variable of the corresponding block is set as true and a state timer is operated(S120). It is confirmed whether data received from each interworking block are a response message, a timeout of a call release message, and a timeout of the state timer(S130). If the received data are the message timeout, it is confirmed whether the retransmission variable is true(S140). If the retransmission variable is true, the call release message is retransmitted to each interworking block and the timer of each corresponding block is operated, and the retransmission variable of each corresponding block is set as true(S150). If the received data are the response message, the response standby variable of the corresponding block is set as false and the timer of the corresponding block is released(S160). It is confirmed whether all response standby variables are false(S170). If the all response standby variables are true, the call release process is completed(S180).

Description

Call release method of mobile communication system {THE CALL RELEASE METHOD IN MOBILE COMMUNICATION SYSTEM}

The present invention relates to a call release method, and in particular, a call of a mobile communication system in which a message transmitted to a call control processor is not lost or a wrong load is applied even when a large number of interlocking blocks are present. It relates to a release method.

In general, a mobile communication system includes a mobile station that performs wireless communication between subscribers, a base station for wirelessly processing incoming or outgoing signals of the mobile station located within a predetermined range of area, and a relay such as E 1 or T1 with the base station. And a control station connected by a line to perform a predetermined control command and an exchange station which connects a call route of an incoming or outgoing call transmitted from the control station.

The incoming or outgoing signal of the mobile station as described above is performed by a call processing processor provided in the control station. In particular, the call release process will be described below.

In general, in the process of call processing, the concept of state is introduced and the corresponding message is sequentially transmitted. When a call is released, the release procedure is performed in any state to transmit the release message. When receiving, it should send a release message to the block associated with it and wait for a response.

For example, assuming that there are two blocks associated with the call release is as follows.

The call processing block of the mobile communication system transmits the A1 and B1 messages for the call release to the A and B blocks, and transitions to the Z state to wait for the reception of the A2 and B2 response messages for the call release approval.

When the call processing block receives the A2 response message, it transitions to the Y state and completes the release when the B2 response message is received. When the B2 response message is received first, the call processing block transitions to the X state and receives the A2 response message, and then releases the call. To complete.

At this time, the required number of states is three, and if the interlocking procedure with the three blocks, the interworking block is much more complicated.

As described above, in the current call release method, when a call release is not completed due to a large number of interlocking blocks according to the call release, a problem arises that an inoperable state occurs in a part of the device which was not predicted.

The present invention is to overcome the above-mentioned problems, even if the number of blocks associated with the call processing, the release procedure only receives all the release message in the state, and for each block by creating an internal database called response The purpose of the present invention is to provide a method for releasing a call in a mobile communication system, in which a response is changed to false when each response message is transmitted, thereby releasing the call when the response allow field for all blocks is false.

1 is a flow chart illustrating a method of release of a mobile communication system according to the present invention.

Features of the present invention for achieving the above object comprises the steps of having a call control processor provided in the control station for performing the call release procedure, and at least one interlocking block for sending and receiving messages when performing the call release procedure; A call release message transmission step of sending a call release message to the interlocking block; A state setting step of setting a state and a variable of the interlocking block; A reception data checking step of checking whether the data received by the call control processor is a response message, whether the call release message has timed out, or whether the state timer has timed out; A retransmission variable checking step of checking whether the retransmission variable is true if the received data of the call control processor is a message timeout in the receiving data checking step; Retransmitting a call cancellation message if the retransmission variable is true in the retransmission variable checking step, starting a timer of the interlocking block, and setting a retransmission variable of the interlocking block to true; A response waiting variable setting step of setting a response waiting variable of the interlocking block to false and releasing a timer of the corresponding block if the data received in the data checking step is a response message; A response waiting variable checking step of checking whether all response waiting variables are false; When the timeout of the state timer in the received data confirmation step, and the result value of the response wait variable check step is true to provide a call release method of the mobile communication system comprising a release completion step of releasing the call.

In a preferred embodiment, the call release message for transmitting a call release message to the block; Setting a response wait variable for setting the response wait variable of the corresponding block to true; A timer operating step of starting a timer of the corresponding block; A retransmission variable setting step of setting a retransmission step of the corresponding block to true; It includes a timer start step for starting the state timer of the block.

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

As described above, the mobile communication system includes a base station wirelessly connected to process incoming and outgoing calls of mobile stations, which are subscriber terminals for call between subscribers, and a control station connected to the base station by a relay line such as E1 or T1. And an exchange station connected to the control station to exchange incoming and outgoing signals of the mobile station.

Here, the base station is provided with a base station call processing processor (BCP) for processing the incoming or outgoing signal of the mobile station, the control station in the call for processing the incoming or outgoing signal transmitted through the base station A control processor (CCP) and a transcoding selector block for converting, generating, and transmitting the PCM signal from the voice signal received from the base station.

The call release method applied to the mobile communication system having such a configuration is as follows.

1 is a flowchart illustrating a call release method of a mobile communication system according to the present invention, and after performing a call release message transmission step (S110) of transmitting a call release message to an interlocking block associated with a call release, waiting for a response of the corresponding block. Set the variable to true, start the timer of the block, set the retransmission variable of the block to true, and perform the standby setup step (S120) of starting the state timer.

In response to the call release message transmitted to the interlocking block, a received data checking step (S130) is performed to check whether the data received from each interlocking block is a response message, a timeout of the call release message, or a timeout of the state timer. do.

If the received data is the message timeout, proceed to the retransmission variable check step (S140) to check whether the retransmission variable is true (True), if true, retransmit the call cancellation message to each interlocking block, The timer is operated, and the retransmission variable of each corresponding block is set to true, and then the retransmission variable checking step S150 is branched to the receiving data checking step S130.

On the contrary, if the result of the reception data checking step S130 is a response message, the response waiting variable of the block is set to false and the response waiting variable setting step S160 of releasing the timer of the corresponding block is performed. Next, a response wait variable check step S170 is performed to check whether all the response wait variables are false.

If the result value is true in the response wait variable check step (S170), proceed to the call release completion step (S180) to complete the call release procedure, and then ends the present loop.

On the other hand, if the data received in the received data checking step (S130) is the timeout of the state timer, and branches to the call release completion step (S180).

A detailed example of the above call release method will be described. For example, a CCP block associated with a BCP, SCP, PCF, and MSC of a mobile communication system currently in operation is as follows.

During the call, the CCP block requests the release of the call to BCP, SCP, PCF, and MSC, and waits for a response. First, the CCP sends a release message to the BCP, SCP, PCF, and MSC. The CCP releases the resources for the call in the CCP after receiving a response to the call release from all blocks and then releases the resources for the call in all the blocks.

Subsequently, the CCP retransmits the response wait variables for the four blocks BCP, SCP, MSC, and PCF to BCP_ack_req, SCP_ack_req, MSC_ack_req, PCF_ack_req, and timer ID variables to BCP_timer_id, SCP_timer_id, MSC_timer_id, PCF_timer_id, and SCP_ire. Set each as MSC_expire, PCF_expire and save them in the internal database.

The CCP sets BCP_ack_req, SCP_ack_req, PCF_ack_req, and MSC_ack_req to true, and sets BCP_expire, SCP_expire, PCF_expire, and MSC_expire to true. If the BCP_ack_req, SCP_ack_req, PCF_ack_req, and MSC_ack_req are set to true, the timer must be set accordingly, and if the timer is released, the BCP_expire, SCP_expire, PCF_expire, and MSC_expire are true if the timer is released. Retransmit and set the retransmission variable to false.

If BCP_ack_req is true, release the timer by referring to BCP_timer_id stored in the internal database, set BCP_ack_req to false, and check whether all response wait variables are false.

On the other hand, if all response wait variables are false, the CCP successfully enters the release procedure.

In short, since all response wait variables are set to false and a timer is started, response waiting variables are not received from the opposite block, thereby preventing the call release process from being complicated.

According to the preferred embodiment of the present embodiment described above, the state concept according to the call release is simplified, and an efficient call release process can be performed by introducing a response wait variable and a retransmission concept.

Claims (2)

Providing a call control processor provided in the control station to perform a call release procedure, and at least one interlocking block for sending and receiving messages when performing the call release procedure; A call release message transmission step of transmitting a call release message to the interlocking block; A state setting step of setting a state and a variable of the interlocking block; A reception data checking step of confirming whether the data received by the call control processor is a response message, whether the call release message has timed out, or whether the state timer has timed out; A retransmission variable checking step of checking whether the retransmission variable is true if the received data of the call control processor is the message timeout in the receiving data checking step; Retransmitting a call cancellation message if the retransmission variable is true in the retransmission variable checking step, starting a timer of the interlocking block, and setting a retransmission variable of the interlocking block to true; A response waiting variable setting step of setting a response waiting variable of the interlocking block to false and releasing a timer of the corresponding block if the data received in the data checking step is a response message; A response waiting variable checking step to check whether all response waiting variables are false, And a release completion step of releasing the call if the timeout of the state timer in the received data checking step and the result value of the response waiting variable checking step is true. The method of claim 1, The state setting step, A response waiting variable setting step of setting the response waiting variable of the corresponding block to true; A timer operation step of starting a timer of the corresponding block; A retransmission variable setting step of setting a retransmission variable of the corresponding block to true; And a timer operating step of starting a state timer.