KR100879679B1 - How to change call handling to improve call quality at sea - Google Patents

Abstract

The present invention relates to a call processing modification method for improving call quality at sea to provide a good call quality service through service switching to a sea-only base station.

The present invention includes a) receiving an outgoing message including a special request for requesting service switching to a marine-dedicated base station transmitted from a general base station by a control station as the mobile communication terminal attempts to make a call; b) thereafter, judging by originating from the sea based on the special number and checking whether there is a marine dedicated base station associated with the general base station; And c) generating a service switching message including identification information of the marine dedicated base station, if the marine dedicated base station exists, and transmitting the service switching message to the mobile communication terminal to perform service switching from the general base station to the marine dedicated base station. In addition, since the marine dedicated base station provides a call service to mobile communication terminals located in coastal and offshore, there is an advantage that it is possible to provide improved call quality service to users.

Maritime, call processing

Description

Service Redirection Method for Enhancing Communication Quality on the Sea}

The present invention relates to a call processing change method for improving call quality at sea, and more particularly, to improve call quality at sea for providing a good call quality service by switching to a dedicated base station. The present invention relates to a call processing change method.

Referring to Figure 1 describes a general call processing procedure in the coast and the offshore, the general base station receives the Origination Message (Origination Message) as the mobile communication terminal attempts to make a call for a voice call or a video call, the control station Transfer to (S101).

Thereafter, the control station transmits a CM Service Request (Connection Management Request) to the exchange (S103), and the exchange performs an authentication operation on the corresponding mobile communication terminal and then requests resource allocation to the control station (Assignment Request). (S105).

The control station allocates a wired resource corresponding to a call (S107), and requests a radio resource allocation including channel resources to a general base station (Channel Element Assignment) (S109).

Subsequently, the general base station allocates radio resources including channel resources (S111), and notifies the mobile communication terminal of the channel configuration information through an extended channel assignment message (S113).

Subsequently, the mobile communication terminal transmits a response message to the channel assignment message to the general base station, and the general base station which receives the message transmits a normal frame, not an idle frame, to the control station, Notify the connection between general base stations. In addition, it is checked whether the traffic path and the Layer 2 function are normally performed by transmitting and receiving messages between the mobile communication terminal and the general base station / control station (S115).

The general base station / control station performs a procedure for adjusting service negotiation with the mobile communication terminal (S117).

The control station sends a channel assignment complete message to the exchange to inform that the setting of the outgoing call is completed (S119). Thereafter, a voice call or a video call is performed (S121).

As in the above-described procedure, since the general base station processes the call processing procedure of the mobile communication terminals located on the coast and the sea, the PNs of the base stations are mixed and the call quality is poor.

Meanwhile, in providing a sea service, a sea dedicated base station is required, and the sea dedicated base station provides a service only to a mobile communication terminal located in a ship in which a sea wave repeater is installed. In other words, the maritime base station is a base station operated for international passenger ship route service of 50 km to 100 km or more and provides service only to mobile communication terminals located in the ocean, but does not provide service to mobile communication terminals located in coastal and offshore areas. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a call processing modification method for improving call quality in a sea that provides enhanced call quality service to mobile communication terminals located in coasts and offshore utilizing a sea base station. There is a technical challenge in providing this.

In addition, an object of the present invention is to reduce the load of the general base station located on the shore by transitioning the mobile communication terminal connected to the general base station to the marine base station.

In addition, an object of the present invention is to enable a mobile communication terminal to receive a service at sea through a marine dedicated base station without changing the software and hardware of the mobile communication terminal.

The present invention for achieving the above object is a call processing change method for improving the call quality at sea,

a) as the mobile communication terminal attempts to originate, receiving, by the control station, an originating message including a special number for requesting service switching from a general base station to a marine dedicated base station; b) thereafter, judging from the sea based on the special number, and checking whether there is a marine base station associated with the general base station; And c) generating a service switching message including identification information of the marine dedicated base station, if the marine dedicated base station exists, and transmitting the service switching message to the mobile communication terminal to perform service switching from the general base station to the marine dedicated base station; It includes.

Another invention is a method of changing a call processing at sea,

a) as the mobile communication terminal attempts to originate, receiving, by the control station, an originating message including a special number for requesting service switching from a marine dedicated base station to a general base station; And b) thereafter, generating a service switching message including identification information of the general base station which causes the mobile communication terminal to switch service to the general base station associated with the marine dedicated base station, and transmitting the service switching message to the mobile communication terminal. Include.

As described above, the call processing change method for improving the call quality in the sea of the present invention is not affected by the general base station signal since the sea base station provides the call service to the mobile communication terminals located on the coast and the sea. It is advantageous in that it can provide enhanced call quality service to users in a state (reduced noise).

In addition, the present invention has the advantage of reducing the load of the general base station located on the coast because the mobile communication terminal connected to the general base station is transferred to the sea base station.

In addition, the present invention has an effect that the mobile communication terminal can be provided at sea through a dedicated base station without changing the software and hardware of the mobile communication terminal.

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

First, FIG. 2 is a diagram illustrating a configuration of a mobile communication system according to the present invention, which will be described with reference to FIG. 3 for explaining a method of changing a call processing.

A mobile communication system for improving call quality at sea includes traffic received through a general base station (BTS, Node B) 210 which is in charge of wireless section communication with the mobile communication terminal 100 and a repeater, and a service switching message ( Marine dedicated base station 230 providing a service to the mobile communication terminal 100 tuned through a service redirection message (SRM), a control station (BSC, RNC) 300 for controlling the base station and the control station 300 And an exchange (MSC) 400 connected with the to perform a call exchange.

The marine base station 230 is installed in a coastal area, and relays not only signals from mobile communication terminals located at a coast, but also signals from mobile communication terminals located at a far sea. It receives signals by dividing them into receivers and covers the coastal area by inserting delay equipment into the coastal receiver to compensate for the disparity of signals input from the shore and the sea.

In addition, the marine-dedicated base station 230 disclosed in the present invention, when mounting a modem capable of demodulating a signal within 50 km, the marine-dedicated base station 230 to the mobile communication terminal 100 to perform service switching to the marine-dedicated base station 230 By providing a channel list corresponding to the FA, it is possible to communicate with the sea-only base station 230 through the channel list.

First, a case in which service switching is performed from a general base station to a marine dedicated base station will be described. The mobile communication system requests a special service request for switching service from the mobile communication terminal 100 to the marine dedicated base station 230 (for example, * If an outgoing call (* 777) is attempted, the mobile communication terminal transmits a service switching message including identification information of the sea-only base station 230 to switch service to the sea-only base station 230 associated with the general base station 210. Send to 100.

The identification information of the marine-dedicated base station refers to identification information of a marine-dedicated base station associated with a general base station to which the mobile communication terminal 100 should perform service switching. Identification (SID), Network Identification (Network Identification (NID)), frequency information or any combination thereof.

Secondly, in the case of performing a service switch from the marine dedicated base station to the general base station, the mobile communication system requests a special service request for switching the service from the mobile communication terminal 100 to the general base station 210 (for example, When an outgoing call including the reference number 999 is attempted, the mobile communication terminal transmits a service switching message including identification information of the general base station 210 to switch the service to the general base station 210 associated with the sea-only base station 230. Send to 100.

Here, the identification information of the general base station includes any one of a system identifier (SID), a network identifier (NID), frequency information, or a combination thereof of the general base station 210.

That is, as shown in FIG. 3, the mobile communication terminal 100 located in the coast and the offshore is shifted from the general base station 210 to the sea base station 230 so as not to be affected by the signal of the general base station 210. Because the service is provided by, the noise is reduced and the call quality is improved.

Figure 4 is a flow chart for explaining an embodiment of a call processing change method according to the present invention.

As the mobile communication terminal 100 attempts to make a call, the control station 300 requests a special service (for example, ** 777) to request service switching from the general base station 210 to the sea-only base station 230 transmitted. Receive an outgoing message including an (Origination Message) (S201).

The control station 300 determines that the call is made at sea on the basis of the special number received in step S201, and checks whether there is a sea dedicated base station 230 associated with the corresponding general base station 210 which has transmitted the call signal. (S203).

As a result of step S203, if there is a marine dedicated base station 230, the control station 300 generates a service switch message containing the identification information of the marine dedicated base station 230, and transmits it to the mobile communication terminal 100 To perform a service switch from the general base station 210 to the sea-only base station 230 (S205).

That is, when the control station 300 confirms that the special number is transmitted from the general base station 210 associated with the sea base station 230 in step S203, the mobile communication terminal 100 tunes to the sea base station 230 in question. The service switching message including the identification information of the marine dedicated base station is transmitted to the mobile communication terminal 100 so as to be able to do so. Here, the identification information of the marine-dedicated base station includes any one of a system identifier (SID), a network identifier (NID), frequency information, or a combination thereof.

As the mobile communication terminal 100 searches for the corresponding frequency band based on the identification information of the sea-based base station 230, the searched sea-based base station 230 to the sea-based base station 230 to the mobile communication terminal 100. The synchronization message (Sync Message) to be synchronized is transmitted (S207, S209).

Subsequently, the mobile communication terminal 100 tunes to the marine base station 230 (S211), and switches to the call waiting state (S213).

Thereafter, the marine-dedicated base station 230 receives an origination message as the mobile communication terminal 100 attempts to make a voice call / video call, and transmits it to the control station 300 (S215). .

The control station 300 transmits a CM Service Request (Connection Management Request) to the switch 400 (S217), and the switch 400 performs an authentication operation on the corresponding mobile communication terminal 100, and then the control station. Resource allocation request to 300 (Assignment Request) (S219).

The control station 300 allocates a wired resource corresponding to a call (S221), and requests a radio resource allocation including channel resources to the sea-only base station 230 (Channel Element Assignment) (S223).

Subsequently, the marine-dedicated base station 230 allocates radio resources including channel resources (S225), and notifies the mobile station to the channel configuration information through an extended channel assignment message (S227). Here, the configuration information of the channel includes an assigned Walsh code, FA of the corresponding base station, and the like. Since the FA includes a channel list corresponding to the sea-only FA, the mobile communication terminal 100 in synchronization with the sea-only base station 230 is connected to the sea-only base station 230 using the channel list. Perform communication.

Subsequently, the mobile communication terminal 100 transmits a response message to the channel assignment message to the marine-dedicated base station 230, and the marine-dedicated base station 230 receives the normal frame instead of an idle frame. ) Is transmitted to the control station 300 to notify the fact of the connection between the mobile communication terminal 100 and the marine base station 230. In addition, it is checked whether or not the traffic path and Layer 2 functions are normally performed by transmitting and receiving messages between the mobile communication terminal 100 and the marine base station / control station 230 and 300 (S229). .

Marine dedicated base station / control station (230, 300) performs a procedure for adjusting the service communication with the mobile terminal (S231). Here, the procedure for adjusting service negotiation is to establish the performance and quality of service factors of the network and the application.

The control station 300 sends a channel assignment complete message to the switch 400 to notify that the setting for the outgoing call is completed (S233).

Thereafter, a voice call or a video call is performed (S235).

On the other hand, when the marine dedicated base station 230 associated with the general base station 210 does not exist as a result of step S203, the control station 300 performs a general call processing procedure with the general base station 210 (S237).

5 is a flowchart for explaining another embodiment of the method for changing a call processing according to the present invention.

As the mobile communication terminal 100 attempts to make a call, the control station 300 requests a special service (for example, ** 999) to request service switching from the maritime base station 230 to the general base station 210 transmitted. Receive an outgoing message including an (Origination Message) (S301).

Subsequently, the control station 300 transmits a service switch message including identification information of the general base station 210 to cause the mobile communication terminal 100 to switch services to the general base station 210 associated with the marine-dedicated base station 230. It generates and transmits it to the mobile communication terminal 100 (S303). Here, the identification information of the general base station includes any one of a system identifier (SID), a network identifier (NID), frequency information, or a combination thereof.

As the mobile communication terminal 100 searches for a corresponding frequency band based on the identification information of the general base station 210, the searched general base station 210 is tuned to the general base station 210 by the mobile communication terminal 100. The sync message is transmitted (S305 and S307).

Subsequently, the mobile communication terminal 100 tunes to the general base station 210 (S309), and switches to the call waiting state (S311).

The special number disclosed in the detailed description of the present invention can be arbitrarily changed by the operator, and the data included in the service change message can also be arbitrarily changed by the operator.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not as restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1 is a flowchart illustrating a general call processing procedure;

2 is a diagram showing the configuration of a mobile communication system according to the present invention;

3 is a diagram for roughly explaining a call processing changing method according to the present invention;

4 is a flowchart for explaining an embodiment of a method for changing a call processing according to the present invention;

5 is a flowchart for explaining another embodiment of the method for changing a call processing according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: mobile communication terminal 210: general base station

230: marine base station 300: control station

400: exchanger

Claims (4)

A method for changing call processing to improve call quality at sea, a) as the mobile communication terminal attempts to originate, receiving, by the control station, an originating message including a special number for requesting service switching from a general base station to a marine dedicated base station; b) thereafter, judging from the sea based on the special number, and checking whether there is a marine base station associated with the general base station; And c) generating a service switching message including identification information of the marine dedicated base station, if the marine dedicated base station exists, and transmitting the service switching message to the mobile communication terminal to perform service switching from the general base station to the marine dedicated base station; Call processing change method for improving the call quality at sea, characterized in that it comprises a. The method of claim 1, After step c), As the mobile communication terminal searches for a corresponding frequency band based on the identification information of the sea base station, transmitting a tuning message for the found sea base station to tune to the sea base station to the mobile communication terminal; Call processing change method for improving the call quality at sea, characterized in that it further comprises. As a method of changing call processing at sea, a) as the mobile communication terminal attempts to originate, receiving, by the control station, an originating message including a special number for requesting service switching from a marine dedicated base station to a general base station; And b) thereafter, generating a service switching message including identification information of the general base station which causes the mobile communication terminal to switch service to the general base station associated with the marine dedicated base station, and transmitting it to the mobile communication terminal; Call processing change method for improving the call quality at sea, characterized in that it comprises a. The method of claim 3, After step b), As the mobile communication terminal searches for the corresponding frequency band based on the identification information of the general base station, transmitting a tuning message for the discovered general base station to tune to the general communication base station to the mobile communication terminal; Call processing change method for improving the call quality at sea, characterized in that it further comprises.

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