KR20060004727A - Call processing method for mobile handset - Google Patents

Call processing method for mobile handset Download PDF

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Publication number
KR20060004727A
KR20060004727A KR1020040052245A KR20040052245A KR20060004727A KR 20060004727 A KR20060004727 A KR 20060004727A KR 1020040052245 A KR1020040052245 A KR 1020040052245A KR 20040052245 A KR20040052245 A KR 20040052245A KR 20060004727 A KR20060004727 A KR 20060004727A
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KR
South Korea
Prior art keywords
base station
call
mobile communication
communication terminal
call setup
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KR1020040052245A
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Korean (ko)
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KR100595126B1 (en
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배성오
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주식회사 팬택
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Priority to KR1020040052245A priority Critical patent/KR100595126B1/en
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Publication of KR100595126B1 publication Critical patent/KR100595126B1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/30Connection release
    • H04W76/38Connection release triggered by timers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access, e.g. scheduled or random access
    • H04W74/08Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/18Management of setup rejection or failure

Abstract

The present invention relates to a call setup method of a mobile communication terminal, the method comprising: requesting a call setup to a central base station having the largest strength of a base station signal according to a user's call connection selection; Requesting call setup from each neighboring base station sequentially according to the base station signal sizes of neighboring base stations when the call establishment request to the central base station is rejected; And receiving a channel from the neighbor base station granting the call establishment request among the neighbor base stations and establishing a call. Accordingly, when call setup is rejected by the central base station in the cell, the neighbor base station except for the central base station is requested again to set up the call. Because it can receive, it can use radio resources efficiently and improve the success probability of voice service.

Description

Call setting method of mobile communication terminal {CALL PROCESSING METHOD FOR MOBILE HANDSET}             

1 is a system configuration diagram for call setup of a conventional mobile communication terminal,

2 is a signal flowchart according to a call setup method of a conventional mobile communication terminal;

3 is a system configuration diagram for call setup of a mobile communication terminal according to the present invention;

4 is a signal flowchart according to a call setup method of a mobile communication terminal according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

100: mobile communication terminal 300: base station

The present invention relates to a call setup method of a mobile communication terminal, and more particularly, by efficiently assigning a radio resource by allowing a radio station to be allocated from a neighboring base station that can be serviced when there is a lack of radio resources in a global system for mobile communications (GSM). The present invention relates to a call setup method of a mobile communication terminal for improving a voice call success rate.

1 is a system configuration diagram for call setup of a conventional mobile communication terminal. As shown in FIG. 1, the mobile communication system is configured based on a cell, which is a serviceable area of the base station 3, around a predetermined base station 3. The base station 3 confirms the subscriber's information to the call request signal from the terminal in the cell, informs the availability of the subscriber, allocates a communication channel, and transmits and receives information with another base station (not shown). Communicate with the other party in the cell or the other party in the other cell.

FIG. 2 is a signal diagram illustrating a call setup process of a conventional mobile communication terminal 1, and in particular, illustrates a case in which radio resources are allocated to the mobile communication terminal 1 in GSM.

In the GSM service system, the mobile communication terminal 1 transmits a radio resource allocation request message to the central base station 3 of the corresponding cell and requests allocation of radio resources (S10).

The base station 3 checks the existence of available radio resources and determines whether to accept or reject them (S30).

When there is an idle resource, the base station 3 allocates a radio channel by transmitting an radio resource assignment message to the mobile communication terminal 1 (S34). Accordingly, the mobile communication terminal 1 may receive a voice call service through the allocated wireless channel (S18).

On the other hand, as a result of the determination in the state S30, when there is no available radio resource, the base station 3 transmits an implicit allocation reject message of the radio resource to the mobile communication terminal 1 (S32) to reject the service request (S32). ).

The mobile communication terminal 1 denied service from the base station 3 checks the Wait Indication included in the Immediate Assignment Reject message and sets a timer according to the corresponding waiting time (S12). ). Here, the mobile communication terminal 1 does not request allocation of radio resources to the base station 3 even if the user requests a voice service during the time indicated by Wait Indication.

The mobile terminal 1 determines whether the waiting time has elapsed through the timer (S14), and after the waiting time has elapsed, transmits a radio resource allocation request message (Random Access message) to the base station 3 (S16). . Even when the call service is re-requested, the base station 3 determines whether to allocate resources according to the presence or absence of resources (S30).

As described above, according to the conventional call setup method, since the mobile communication terminal requests call setup only to a specific base station in a cell to which the mobile communication terminal belongs, the request of the voice call service may succeed or fail depending on which base station the service is currently requested. In addition, even when a call is congested in a cell, since the call setup request is continuously made to the same base station, there is a problem that the voice call success rate is lowered.

In addition, when the service is rejected from the base station, even if the user requests until the wait time has elapsed, since the mobile communication terminal does not request the call service to the base station, the success rate of the voice call felt is further lowered. There is a problem that is mistaken for an error of the mobile communication terminal.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention provides a mobile communication terminal that efficiently allocates radio resources and improves voice call success rate by allowing radio resources to be allocated from neighboring base stations that can service when there is insufficient radio resources. The purpose is to provide a call setup method.

According to an aspect of the present invention, there is provided a call setup method of a mobile communication terminal, the method comprising: requesting a call setup to a central base station having the largest strength of a base station signal according to a user's call connection selection; Requesting call setup from each neighboring base station sequentially according to the base station signal sizes of neighboring base stations when the call establishment request to the central base station is rejected; And receiving a channel from the neighbor base station granting the call establishment request among the neighbor base stations and establishing a call.

The method may further include displaying a call connection failure message to the user when the number of times of call establishment request rejection of the neighboring base station reaches a predetermined reference number.

Hereinafter, a call setting method of a mobile communication terminal according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram illustrating a system configuration for call setup of a mobile communication terminal according to the present invention, which illustrates a case in which a mobile communication terminal requests call setup to a base station based on GSM. The GSM system is most suitable for implementing a call setup method according to the present invention because the mobile communication terminal always measures time information and signal strength with respect to neighboring base stations in an idle state.

As shown in FIG. 3, the mobile communication terminal 100 receives not only the central base station 300 of the serving cell but also the signals of the neighboring base stations 400 so that the base station signal of another cell can be received with sufficient strength. Call 400 may request call setup. That is, the mobile communication terminal 100 rejected the service from the center base station 300 of the cell to which the cell belongs to the neighbor having a good signal environment enough to support the voice service by receiving a signal from the adjacent base station 400 of another adjacent cell. The base station 400 requests the call setup.

Herein, the mobile communication terminal 100 which has been denied service from the central base station 300 checks the wait indication included in the immediate assignment reject message transmitted by the central base station 300, During the waiting time, the radio base station 300 does not transmit a radio resource allocation request message (Random Access message). Instead, the mobile communication terminal 100 sets up a call by transmitting a radio resource allocation request message to a base station having the largest signal strength among other neighboring base stations 400 except the central base station 300 which has refused service. Ask.

4 is a signal flowchart according to a call setup method of a mobile communication terminal 100 according to the present invention.

The mobile communication terminal 100 first transmits a radio resource allocation request message to a central base station of a corresponding cell and requests allocation of radio resources (S100).

The central base station 300 checks the existence of available radio resources and determines whether to accept or reject the request of the mobile communication terminal 100 (S300). If there is an idle resource, the central base station 300 transmits an radio resource assignment message to the mobile communication terminal 100 and allocates a radio channel to provide a voice call service.

However, if there is no radio resource available, the central base station 300 transmits an improper assignment message of radio resources to the mobile communication terminal 100 and rejects the service request (S310).

The mobile communication terminal 100 which has been denied service from the central base station 300 to the central base station 300 during the Wait Indication included in the Immediate Assignment Reject message of the central base station 300. It does not request allocation of radio resources.

 The mobile communication terminal 100 selects the neighbor base station 400 having the largest signal strength among the neighbor cells, and transmits an radio resource assignment message to the neighbor base station 400 (S120). Here, the mobile communication terminal 100 searches for the neighbor base station 400 having the largest signal strength, and searches for the BCCH (Broad Casting Channel), which is a channel providing system information among control channels transmitted from the neighbor base station 400. Collects information of the neighboring base station 400 through the request for call setup.

The neighboring base station 400 having received the channel allocation request from the mobile communication terminal 100 determines whether to accept or reject the request of the mobile communication terminal 100 by checking the existence of available radio resources (S320). If there is an idle resource, the neighboring base station 400 allocates a radio channel to the mobile communication terminal 100, but if there is no radio resource available in the neighboring base station 400, the radio station is allocated to the mobile communication terminal 100. The service request is rejected by transmitting an implicit message (Immediate Assignment Reject message) (S330).

Accordingly, the mobile communication terminal 100 requests the call setup after reading the BCCH information of the neighboring base station 400, which has received the signal in the next rank. The mobile communication terminal 100 requests call setup for a predetermined number of neighboring base stations 400 according to a preset number of times, and if the call setup request is rejected, the mobile communication terminal 100 indicates that the request for the voice call service has failed. (S130).

As described above, the call setup method of the mobile communication terminal of the present invention re-requests call setup from neighboring base stations except the base base station when the call setup is rejected from the center base station in the cell. Since resources can be allocated through a base station of a neighboring cell with sufficient margin, radio resources can be efficiently used and the probability of success of a voice service can be improved.

On the other hand, when the mobile communication terminal is using a roaming service, if the voice service request is rejected from the central base station and neighboring base stations, it is displayed to the user, and then registered with another roamable operator to process the required voice service.

Accordingly, in the case of the mobile communication terminal in the outer region or roaming region of the cell, the number of base stations capable of call setup request increases, thereby supporting more effective voice service.

As described above, the embodiment according to the present invention is not limited to the above, and various modifications can be made within the scope apparent to those skilled in the art in connection with the present invention.

As described above, the call setup method of the mobile communication terminal according to the present invention is to request call setup again from an adjacent base station except the base base station if the call setup is rejected from the center base station in the cell.

Accordingly, even when a call is congested in a corresponding cell, resources can be allocated through a base station of a neighboring cell having resources, thereby enabling efficient use of radio resources and improving the probability of success of a voice service.

Claims (2)

  1. Requesting call establishment to a central base station having the largest strength of a base station signal according to a user's call connection selection;
    Requesting call setup from each neighboring base station sequentially according to the base station signal sizes of neighboring base stations when the call establishment request to the central base station is rejected;
    And setting up a call by allocating a channel from the neighboring base station granting the call establishment request among the neighboring base stations.
  2. The method of claim 1,
    And displaying a call failure message to the user when the number of the call establishment request rejection of the neighboring base station reaches a predetermined reference number.
KR1020040052245A 2004-07-06 2004-07-06 Call processing method for mobile handset KR100595126B1 (en)

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Application Number Priority Date Filing Date Title
KR1020040052245A KR100595126B1 (en) 2004-07-06 2004-07-06 Call processing method for mobile handset

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KR1020040052245A KR100595126B1 (en) 2004-07-06 2004-07-06 Call processing method for mobile handset

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KR100595126B1 KR100595126B1 (en) 2006-06-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100761700B1 (en) * 2006-01-26 2007-09-28 삼성전자주식회사 Method for connecting signal in mobile communication terminal
KR101046054B1 (en) * 2009-01-14 2011-07-01 주식회사 케이티 Service switching ping pong prevention device and system in mobile communication system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100240474B1 (en) * 1997-09-18 2000-01-15 이홍선 Method of linking between cellular phone and base station
US7826844B2 (en) 2002-01-16 2010-11-02 Qualcomm Incorporated Method and apparatus for efficient selection and acquisition of a wireless communications system
KR101002865B1 (en) * 2003-10-14 2010-12-21 삼성전자주식회사 Cell Reselection Method in Dual Mode Mobile Telecommunication

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100761700B1 (en) * 2006-01-26 2007-09-28 삼성전자주식회사 Method for connecting signal in mobile communication terminal
US8000705B2 (en) 2006-01-26 2011-08-16 Samsung Electronics Co., Ltd Apparatus and method for connecting call in mobile terminal
KR101046054B1 (en) * 2009-01-14 2011-07-01 주식회사 케이티 Service switching ping pong prevention device and system in mobile communication system

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