KR20040046846A - Call configuration method using change of frequency assignment in mobile communication system - Google Patents

Call configuration method using change of frequency assignment in mobile communication system Download PDF

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KR20040046846A
KR20040046846A KR1020020074883A KR20020074883A KR20040046846A KR 20040046846 A KR20040046846 A KR 20040046846A KR 1020020074883 A KR1020020074883 A KR 1020020074883A KR 20020074883 A KR20020074883 A KR 20020074883A KR 20040046846 A KR20040046846 A KR 20040046846A
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terminal
call
resource
base station
mobile communication
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KR1020020074883A
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Korean (ko)
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KR100536664B1 (en
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김수진
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엘지전자 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Abstract

PURPOSE: A method for setting a call through an FA(Frequency Assignment) change in a mobile communication system is provided to retrieve whether an FA has a usable resource if a system resource cannot be assigned to an FA requested for call setting, and to set a call by changing into the FA having the usable resource, thereby efficiently distributing FA resources. CONSTITUTION: If the first FA is selected(S30), a base station assigns a UATI(Unicast Access Terminal Identifier) and transmits the UATI to a terminal(S31). The terminal transmits a connection request message to the base station(S32). The base station checks whether the FA has a usable resource, and decides whether the FA can use the resource(S33,S34). If the usable resource is drained, the base station assigns a system resource to the second FA(S35), and transmits a traffic channel assignment message to the terminal(S36). The terminal senses that the first FA is changed into the second FA to set a call, and sets the call with the second FA(S37). If the call setting is successful, the terminal transmits traffic channel complete, pilot, and DRC(Data Rate Control) information to complete the call setting(S38).

Description

이동통신 시스템에서의 에프에이 변경을 통한 호 설정 방법{CALL CONFIGURATION METHOD USING CHANGE OF FREQUENCY ASSIGNMENT IN MOBILE COMMUNICATION SYSTEM}CALL CONFIGURATION METHOD USING CHANGE OF FREQUENCY ASSIGNMENT IN MOBILE COMMUNICATION SYSTEM}

본 발명은 이동통신 시스템의 호 설정 방법에 관한 것으로, 특히 이동통신 시스템에서 단말기가 호(call) 설정을 위하여 요청한 FA(Frequency Assignment)에 시스템 자원을 할당할 수 없는 경우, 할당 가능한 자원을 가진 FA가 있는지 여부를 검색한 후 가용한 자원을 가진 FA로 변경하여 호를 설정하는 이동통신 시스템에서의 에프에이 변경을 통한 호 설정 방법에 관한 것이다.The present invention relates to a call setup method of a mobile communication system. In particular, in a mobile communication system, when a terminal cannot allocate a system resource to a frequency assignment requested for a call setup, an FA having an assignable resource is provided. The present invention relates to a method for establishing a call through a change of a FA in a mobile communication system that sets up a call by searching for whether there is an error and then changing to an FA having available resources.

도1은 종래 에프에이 자원 고갈시 이동통신 시스템에서의 호 설정 과정을 보인 절차도인데, 이의 동작을 설명하면, FA(Frequency Assignment)가 2개 이상 설치된 이동통신 시스템에서, 단말기는 자신의 고유한 세션 시드(session seed)로 현재 기지국에 설치된 FA 자원 중 하나를 하쉬(HASH)하여 선택하고 나서, 선택된 FA를 통하여 기지국으로부터 임시 어드레스인 액세스단말식별자(Unicast Access Terminal Identifier, UATI)를 할당받은 다음, 호 설정을 위하여 기지국으로 접속요구메시지(Connection Request)를 전송한다.1 is a process diagram showing a call setup process in a mobile communication system when a conventional resource is exhausted. Referring to the operation thereof, in a mobile communication system in which two or more FA (Frequency Assignment) is installed, the terminal has its own session. As a seed, one of the FA resources currently installed in the base station is selected by HASH, and then a temporary address is assigned a unicast access terminal identifier (UATI) from the base station through the selected FA. A connection request is sent to the base station for configuration.

그러면, 기지국은 단말기로부터 요청받은 FA의 사용 가능한 자원이 있는 지 여부를 검사하는데, 접속한 단말기의 수가 많아 FA에 사용 가능한 자원이 없을 경우 시스템 자원을 할당하는 절차를 거치지 않고 단말기로 접속거부메시지(Connection Deny)를 전송하여 호 설정을 거부하게 된다.Then, the base station checks whether there is an available resource of the FA requested from the terminal, and if there are no resources available for the FA, the access rejection message to the terminal does not go through the procedure of allocating system resources. Connection Deny) to reject the call setup.

즉, 단말기에 의하여 선택된 특정 FA의 자원이 접속한 단말기의 수가 많아고갈된 경우 이동통신 시스템에 2개 이상의 FA가 설치되어 있음에도, 해당 단말기는 시스템 자원이 남아 있는 다른 FA에 대하여 호 설정을 시도하지 못한 채 시스템으로부터 서비스를 받지 못한다.That is, when the number of terminals connected to a specific FA resource selected by the terminal is depleted, even if two or more FAs are installed in the mobile communication system, the terminal does not attempt to establish a call to another FA having system resources remaining. Not receiving services from the system.

상기에서와 같이 종래의 기술에 있어서, 2 이상의 FA를 갖는 이동통신 시스템에 있어서 단말기가 호 설정을 위하여 선택한 기지국의 FA의 자원이 고갈된 경우 가용한 자원을 가진 FA가 있음에도 불구하고 선택된 FA에 대하여 호 설정을 거부함으로써, 시스템의 FA 자원을 효율적으로 배분하여 관리하지 못하는 것은 물론, 호 설정이 되기까지 반복하여 접속요구메시지를 보낸 후 시스템으로부터 서비스를 받기까지 대기시간이 증가하는 문제점이 있었다.In the prior art as described above, in the mobile communication system having two or more FAs, if the FA of the base station selected by the terminal for call setup is exhausted, the FA with the available resources is available. By rejecting the call setup, there is a problem in that the FA resources of the system cannot be efficiently allocated and managed, and the waiting time is increased until the call setup is made and the service is received from the system repeatedly.

따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 제안한 것으로, 이동통신 시스템에서 단말기가 호(call) 설정을 위하여 요청한 FA(Frequency Assignment)에 시스템 자원을 할당할 수 없는 경우, 할당 가능한 자원을 가진 FA가 있는지 여부를 검색한 후 가용한 자원을 가진 FA로 변경하여 호를 설정하는 이동통신 시스템에서의 에프에이 변경을 통한 호 설정 방법을 제공함에 그 목적이 있다.Accordingly, the present invention has been proposed to solve the above-mentioned problems. In the mobile communication system, when a terminal cannot allocate system resources to a frequency assignment requested by a terminal for call setup, an allocable resource The purpose of the present invention is to provide a method for establishing a call through the change of the F in a mobile communication system that sets up a call by searching for whether there is an FA with the available resource and then changing to an FA with the available resources.

도1은 종래 에프에이 자원 고갈시 이동통신 시스템에서의 호 설정 과정을 보인 절차도.1 is a flowchart illustrating a call setup process in a mobile communication system when a conventional resource is exhausted.

도2는 본 발명 이동통신 시스템에서의 에프에이 변경을 통한 호 설정 방법의 동작과정을 보인 절차도.Figure 2 is a flow chart showing the operation of the call setup method through the FM change in the mobile communication system of the present invention.

도3은 본 발명 이동통신 시스템에서의 에프에이 변경을 통한 호 설정 방법의 과정을 보인 순서도.Figure 3 is a flow chart illustrating a process of the call setup method through the change of the A in the mobile communication system of the present invention.

***도면의 주요 부분에 대한 부호의 설명****** Description of the symbols for the main parts of the drawings ***

이와 같은 목적을 달성하기 위한 본 발명은, 단말기로부터 선택된 FA에 대하여 사용 가능한 자원이 있는지 여부를 검사하여 선택된 FA의 자원이 고갈된 경우,다른 FA에 대하여 사용 가능한 자원이 있는지 여부를 검색하는 단계와; 상기 검색 결과, 가용 자원을 가진 FA에 시스템 자원을 할당하여 FA를 변경한 다음, 단말기로 트래픽채널할당메시지를 전송하여 상기 변경된 FA로 호를 설정하는 단계를 포함하는 포함하는 것을 특징으로 한다.The present invention for achieving the above object is, by checking whether there is a resource available for the selected FA from the terminal, if the resources of the selected FA is exhausted, searching for whether there is a resource available for the other FA and ; And as a result of the search, assigning a system resource to an FA having available resources, changing the FA, and then transmitting a traffic channel assignment message to the terminal to set up a call to the changed FA.

이하, 본 발명에 따른 일실시예를 첨부한 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

도2는 본 발명 이동통신 시스템에서의 에프에이 변경을 통한 호 설정 방법의 동작과정을 보인 절차도로서, 이의 동작과정을 도3을 참조하여 설명한다.FIG. 2 is a flowchart illustrating an operation of the call setup method through the AFA change in the mobile communication system according to the present invention. FIG.

FA(Frequency Assignment)가 2개 이상 설치된 이동통신 시스템에서 일반적인 단말기와 기지국 사이의 호 설정 과정은, 단말기가 자신의 고유한 세션 시드(session seed)로 현재 기지국에 설치된 FA 자원 중 하나를 하쉬(HASH)하여 임의로 제1 FA를 선택하면(S30), 기지국은 선택된 제1 FA를 통해 임시 어드레스인 액세스단말식별자(Unicast Access Terminal Identifier, UATI)를 할당하여 단말기로 전송하고(S31), 단말기는 기지국으로 요청한 제1 FA에 대한 접속요구메시지 (Connection Request)를 전송한다(S32).In a mobile communication system in which two or more FAs are installed, a call setup process between a general terminal and a base station is performed by the terminal with one of its own session seeds, and one of the FA resources currently installed in the base station is hashed. When the first FA is arbitrarily selected (S30), the base station allocates and transmits an unicast access terminal identifier (UATI), which is a temporary address, to the terminal through the selected first FA (S31). A connection request message for the requested first FA is transmitted (S32).

여기서, 단말기가 최초에 선택한 FA를 제1 FA로, 그 이후에 가용한 자원이 있는 것으로 지정되는 FA를 제2 FA로 가정한다.Here, it is assumed that the first FA selected by the terminal is the first FA, and the FA designated as having the available resources thereafter is the second FA.

그러면, 기지국은 단말기로부터 요청받은 제1 FA에 사용 가능한 자원이 있는지 검사하여 그 제1 FA에 사용가능한 자원이 있는 지 여부를 판단한다(S33,S34).Then, the base station checks whether there is a resource available in the first FA requested from the terminal and determines whether there is a resource available in the first FA (S33, S34).

만약 제1 FA에 접속한 사용자의 수가 많아 사용 가능한 자원이 고갈된 상태라면, 기지국은 현재 기지국에 설치된 다른 FA에 사용 가능한 자원이 있는 지 여부를 검색한 후 제2 FA에 시스템 자원을 할당한다(S35).If the number of users connected to the first FA is high and the available resources are depleted, the base station searches for whether there are resources available in other FAs installed in the base station and allocates system resources to the second FA. S35).

여기서, 기지국은 설치되어 있는 다른 FA 모두를 검색하여 사용 가능한 자원을 찾으므로, 시스템상의 전체적인 자원 상태를 관리하게 된다.In this case, the base station searches for all available FAs to find available resources, thereby managing the overall resource state of the system.

그리고, 기지국은 단말기로 트래픽채널할당메시지(Traffic Channel Assignment)를 전송하고(S36), 이때 단말기가 최초로 요청한 FA가 제1 FA에서 제2 FA로 변경되었으므로 메시지 내의 코드분할 다중접속방식(Code Division Multiful Access, CDMA) 채널정보에 변경된 FA 정보를 담아 전송한다.The base station transmits a traffic channel assignment message to the terminal (S36), and at this time, since the first FA requested by the terminal is changed from the first FA to the second FA, the code division multiple access scheme in the message (Code Division Multiful) Access, CDMA) transmits the changed FA information in the channel information.

그러면, 단말기는 상기와 같은 정보가 실린 트래픽채널할당메시지를 수신받아 최초에 요청한 제1 FA가 제2 FA로 변경되어 호가 설정되었음을 감지하게 되고, 그에 따라 제2 FA로 호가 설정된다(S37).Then, the terminal receives the traffic channel assignment message containing the above information and detects that the first requested FA is changed to the second FA and the call is established, and the call is set to the second FA accordingly (S37).

여기서, 상기 트래픽채널할당메시지 전송시 제1 FA로 호 설정을 요청한 단말기는 제1 FA를 통해 호 설정하기 위해 대기하고 있으므로, 기지국은 최초에 접속요구메시지를 수신하였던 제1 FA를 통하여 단말기로 트래픽채널할당메시지를 전송한다.In this case, since the terminal requesting the call setup to the first FA is waiting for the call setup through the first FA when the traffic channel assignment message is transmitted, the BS transmits traffic to the terminal through the first FA that initially received the access request message. Send channel assignment message.

그후, 단말기에 트래픽채널할당메시지가 정상적으로 수신되고 변경된 제2 FA로의 호 설정이 성공하면, 단말기는 변경된 제2 FA에 대하여 트래픽채널완료메시지(Traffic Channel Complete), 파일럿(Pilot), DRC(Data Rate Control) 정보를 전송하여 호 설정을 완료하게 된다(S38).Thereafter, if the traffic channel assignment message is normally received by the terminal and the call setup to the changed second FA succeeds, the terminal receives a traffic channel complete message, a pilot, and a data rate for the changed second FA. Control) transmits the information to complete the call setup (S38).

한편, 상기 단계(S34)에서 제1 FA에 사용 가능한 자원이 있다면, 기지국은단말기에 의해 선택된 제1 FA에 시스템 자원을 할당한 후 단말기로 트래픽채널할당메시지를 전송한다(S39).On the other hand, if there is a resource available for the first FA in step S34, the base station allocates system resources to the first FA selected by the terminal and transmits a traffic channel assignment message to the terminal (S39).

그리고, 단말기는 선택된 제1 FA에 호를 설정하게 되고, 제1 FA에 대하여 트래픽채널완료메시지(Traffic Channel Complete), 파일럿(Pilot), DRC(Data Rate Control) 정보를 전송하여 호 설정을 완료하게 된다(S38).The terminal sets a call to the selected first FA, and completes call setup by transmitting traffic channel complete, pilot, and data rate control (DRC) information to the first FA. (S38).

이상에서 설명한 바와 같이 본 발명은 2 이상의 FA(Frequency Assignment)를 갖는 이동통신 시스템에서 단말기가 호(call) 설정을 위하여 요청한 FA에 시스템 자원을 할당할 수 없는 경우, 사용 가능한 자원을 가진 FA가 있는지 여부를 검색한 후 가용 자원을 가진 FA로 변경하여 호를 설정함으로써, 시스템의 FA 자원을 효율적으로 배분하여 관리함과 아울러, 단말기가 요청한 FA에 호가 설정될 때까지 기다릴 필요없이 호 설정이 가능하여 호 성공률을 향상시키는 효과가 있다.As described above, according to the present invention, in a mobile communication system having two or more FA (Frequency Assignment), if a terminal cannot allocate system resources to a requested FA for call setup, whether there is an FA with available resources. By retrieving the status and changing to FA with available resources to set up the call, the system efficiently allocates and manages the FA resources of the system and calls can be set up without waiting for the call to be set to the requested FA. It has the effect of improving the success rate.

Claims (3)

단말기로부터 선택된 FA에 대하여 사용 가능한 자원이 있는지 여부를 검사하여 선택된 FA의 자원이 고갈된 경우, 다른 FA에 대하여 사용 가능한 자원이 있는지 여부를 검색하는 단계와; 상기 검색 결과, 가용 자원을 가진 FA에 시스템 자원을 할당하여 FA를 변경한 다음, 단말기로 트래픽채널할당메시지를 전송하여 상기 변경된 FA로 호를 설정하는 단계를 포함하는 것을 특징으로 하는 이동통신 시스템에서의 에프에이 변경을 통한 호 설정 방법.Checking whether there is a resource available for the selected FA from the terminal, and if the resource of the selected FA is exhausted, searching whether there is a resource available for the other FA; In the mobile communication system comprising the step of changing the FA by allocating system resources to the FA having the available resources, and then transmitting a traffic channel assignment message to the terminal to establish a call to the changed FA How to set up a call through this change. 제1항에 있어서, 상기 트래픽채널할당메시지의 전송시, 변경된 FA의 정보를 코드분할 다중접속방식 채널정보에 포함시켜 전송하는 것을 특징으로 하는 이동통신 시스템에서의 에프에이 변경을 통한 호 설정 방법.The method as claimed in claim 1, wherein the changed FA information is included in the code division multiple access channel information when the traffic channel assignment message is transmitted. 제1항 또는 제2항에 있어서, 상기 트래픽채널할당메시지의 전송시, 최초에 상기 단말기에 의해 선택된 FA를 통하여 단말기로 전송하는 것을 특징으로 하는 이동통신 시스템에서의 에프에이 변경을 통한 호 설정 방법.[4] The method of claim 1 or 2, wherein the transmission of the traffic channel assignment message is transmitted to a terminal through an FA selected by the terminal.
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KR100733511B1 (en) * 2005-12-30 2007-07-02 포스데이타 주식회사 Working fa assignment method, working fa assignment device in the wireless portable internet system
WO2009078569A2 (en) * 2007-12-18 2009-06-25 Electronics And Telecommunications Research Institute Method of changing frequency assignment status in broadband wireless access system
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KR101389461B1 (en) * 2007-08-22 2014-05-28 에스케이 텔레콤주식회사 Method and Base Station Transceiver Subsystem for Frequency Assignment according to Load Balancing in EVDO System
KR101449609B1 (en) * 2008-03-11 2014-10-14 삼성전자주식회사 Apparatus and method for reduceing handover latency in wireless communication system

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KR100733511B1 (en) * 2005-12-30 2007-07-02 포스데이타 주식회사 Working fa assignment method, working fa assignment device in the wireless portable internet system
KR101389461B1 (en) * 2007-08-22 2014-05-28 에스케이 텔레콤주식회사 Method and Base Station Transceiver Subsystem for Frequency Assignment according to Load Balancing in EVDO System
KR101237441B1 (en) * 2007-08-29 2013-02-26 삼성전자주식회사 Method and apparatus for load balancing in wideband communication system
WO2009078569A2 (en) * 2007-12-18 2009-06-25 Electronics And Telecommunications Research Institute Method of changing frequency assignment status in broadband wireless access system
WO2009078569A3 (en) * 2007-12-18 2010-07-22 Electronics And Telecommunications Research Institute Method of changing frequency assignment status in broadband wireless access system
US8681732B2 (en) 2007-12-18 2014-03-25 Samsung Electronics Co., Ltd. Method of changing frequency assignment status in broadband wireless access system
KR101449609B1 (en) * 2008-03-11 2014-10-14 삼성전자주식회사 Apparatus and method for reduceing handover latency in wireless communication system

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