KR20010068446A - The Mobile Subscriber Roaming Control of CDMA WPBX/Keyphone System - Google Patents

The Mobile Subscriber Roaming Control of CDMA WPBX/Keyphone System Download PDF

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KR20010068446A
KR20010068446A KR1020000000370A KR20000000370A KR20010068446A KR 20010068446 A KR20010068446 A KR 20010068446A KR 1020000000370 A KR1020000000370 A KR 1020000000370A KR 20000000370 A KR20000000370 A KR 20000000370A KR 20010068446 A KR20010068446 A KR 20010068446A
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channel
cdma
message
private exchange
base station
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KR1020000000370A
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Korean (ko)
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정용주
노경호
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정용주
기가시스네트(주)
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

PURPOSE: A subscriber roaming control method of a CDMA(Code Division Multi Access) wireless PBX(Private Branch Exchange)/keyphone system is provided to construct the CDMA wireless PBX/keyphone system in a service region as an overlay cell. CONSTITUTION: A mobile terminal receives a pilot channel signal(2) transmitted to a CDMA(Code Division Multi Access) wireless PBX(Private Branch Exchange)/keyphone system by a larger determined level than a level of a pilot channel signal(1), and is turned into an idle hand off(3). The mobile terminal transmits a location register requesting message(4) when a part of location register related to parameters are changed. A system controller receiving the location register requesting message transmits a location register responding message(6) and a channel assigning message(7) if the mobile terminal is a home subscriber(5). The system controller transmits the only location register responding message when the location register requesting message is received from the outer subscriber. If a receiving call for the home subscriber(5) is generated, the system controller converts the receiving call into an inner calling message(9) of the CDMA wireless PBX, and transmits the inner calling message(9) to the mobile terminal. A channel converting commander induces the idle hand off from a mobile communication network base station to the CDMA wireless PBX.

Description

씨디엠에이 무선사설교환기/키폰시스템의 가입자 로밍 제어 방법{The Mobile Subscriber Roaming Control of CDMA WPBX/Keyphone System}Subscriber roaming control method of CDM wireless private branch exchange / keyphone system {The Mobile Subscriber Roaming Control of CDMA WPBX / Keyphone System}

CDMA 이동통신서비스가 대중적으로 널리 보급된 상황에서 공공영역에서 이동통신망을 이용하여 통신서비스를 제공하고, 사무실과 같은 사유영역에서도 동일한 CDMA 셀룰러 단말기와 PCS 단말기를 통해 통신을 하려는 시도가 이루어지고 있다. 이를 위해 이동통신망의 기지국 신호를 일정 영역에 중계하는 광중계기 등을 설치하거나, 음성부호화기를 포함하면서 이동통신교환기에 직접 접속되는 기지국을 건물 내에 설치하여 이동통신망의 서비스 영역을 확장하는 개념의 제품들이 사용되고 있다. 이동통신망의 광중계기나 기지국을 이용하여 사무실과 같은 사유영역에서CDMA 셀룰러 단말기와 PCS 단말기를 통해 통신서비스를 제공하는 경우 로밍제어는 이동통신망 운용기능의 일부로써 제공되지만, 광중계기나 기지국을 사유영역에 설치하는 것은 이동통신사업자의 경제적 이해관계에 따라 결정되는 사항이며 일반 사용자가 원할 경우 언제든지 설치할 수 있는 것이 아니다. 설사 이와 같은 제품들이 사무실 등에 설치된다고 하더라도 회사 내부에서 발생하는 모든 통신 뿐만 아니라 유선전화망 착신호도 이동통신망을 경유하게 되므로 통신비용이 과다하게 소요되어 사무실 내의 유선전화를 대체하는 통신수단이 될 수 없다.In the situation where CDMA mobile communication service has been widely popularized, attempts have been made to provide a communication service using a mobile communication network in a public area, and to communicate through the same CDMA cellular terminal and a PCS terminal in a private area such as an office. To this end, products with the concept of extending the service area of a mobile communication network by installing an optical repeater for relaying a base station signal of a mobile communication network to a predetermined area, or by installing a base station directly connected to the mobile communication switch, including a voice encoder, in a building It is used. In case of providing communication service through CDMA cellular terminal and PCS terminal in private area such as office by using optical repeater or base station of mobile communication network, roaming control is provided as part of mobile network operation function, but optical relay or base station is used in private area Installation is determined by the economic interests of the mobile operator and may not be installed at any time by the general user. Even if these products are installed in the office, not only all the communication generated inside the company, but also the landline telephone network incoming call will go through the mobile communication network, so communication costs are excessive and cannot be a means of replacing the landline telephone in the office.

본 발명은 종래 기술의 단점을 보완하여 사설 기지국 역할을 수행하는 CDMA 무선사설교환기/키폰시스템을 이동통신망 기지국의 서비스 영역에 중첩 셀로써 설치하여, 기존에 사용하던 CDMA 셀룰러 단말기와 PCS 단말기를 이용하여 사설 기지국을 통해 시스템 내부 발착신호 서비스 뿐만 아니라 유선전화망 접속 서비스 및 이동통신망으로부터 착신호 서비스를 수용한다. 또한 이동통신망에서 운용기능으로써 제공되는 로밍제어를 효과적으로 CDMA 무선사설교환기/키폰시스템에서 수행한다.The present invention provides a CDMA wireless private branch exchange / keyphone system, which serves as a private base station to compensate for the disadvantages of the prior art, as an overlapping cell in a service area of a mobile communication network base station, by using a conventional CDMA cellular terminal and a PCS terminal. A private base station accommodates incoming and outgoing service from wired telephone network access service and mobile communication network as well as internal system call service. In addition, roaming control provided as an operation function in a mobile communication network is effectively performed in a CDMA wireless private exchange / keyphone system.

홈 가입자가 이동통신망 기지국의 서비스 영역과 CDMA 무선사설교환기/키폰시스템의 서비스 영역 사이를 이동하는 경우 CDMA 주파수 채널전환이 사용자의 개입이 없이 자동으로 이루어지도록 한다. 한편 외부 가입자의 경우는 CDMA 무선사설교환기/키폰시스템의 서비스를 이용하지 않고 이동통신망 기지국에 직접 접속하도록 사용자의 로밍을 제어한다.When the home subscriber moves between the service area of the mobile communication base station and the service area of the CDMA wireless private exchange / keyphone system, the CDMA frequency channel switching is automatically performed without user intervention. On the other hand, the external subscriber controls the roaming of the user to directly access the mobile communication network base station without using the service of the CDMA wireless private exchange / keyphone system.

-. 도 1은 가입자의 로밍을 지원하기 위한 CDMA 무선사설교환기/키폰시스템에 의해 구성되는 중첩 셀 형상-. 1 is an overlapping cell configuration configured by a CDMA wireless private exchange / keyphone system to support roaming of subscribers.

-. 도 2는 CDMA 무선사설교환기/키폰시스템의 로밍 제어기능 블록도-. 2 is a block diagram of a roaming control function of a CDMA wireless private exchange / keyphone system

-. 도 3은 CDMA 무선사설교환기/키폰시스템의 서비스 영역으로 로밍하는 홈 가입자의 CDMA 주파수 채널을 변경하는 절차-. 3 is a procedure for changing a CDMA frequency channel of a home subscriber roaming to a service area of a CDMA wireless private exchange / keyphone system.

상기의 목적을 달성하기 위해 CDMA 무선사설교환기/키폰시스템에서 사용하는 본 발명에 따른 로밍제어 방법의 실시 예를 상세히 설명한다.In order to achieve the above object, an embodiment of a roaming control method according to the present invention used in a CDMA wireless private exchange / keyphone system will be described in detail.

제 1 도는 본 발명이 적용되는 CDMA 무선사설교환기/키폰시스템에 의해 구성되는 중첩 셀의 형상을 나타내었다. (1)은 이동통신망의 기지국이 서비스하는 영역을 나타내며, 이 서비스 영역 가운데 (2)와 같이 특정한 일부의 영역을 주변 이동통신망 기지국이 사용하지 않는 CDMA 주파수 채널을 사용하는 CDMA 무선사설교환기 /키폰시스템에 의한 중첩 셀로 구성한다. (1)영역에서는 홈 가입자와 외부 가입자가 이동통신망의 기지국을 통해 통신서비스를 제공 받는다. 홈 가입자가 (2) 영역으로 진입할 경우 중첩 셀에 할당된 CDMA 주파수 채널로 사용자의 개입 없이 자동으로 전환되도록 제 3 도의 주파수 채널전환절차를 따른다. 홈 가입자의 단말기가 CDMA 무선사설교환기/키폰시스템에서 사용하는 CDMA 주파수 채널로 전환된 후, CDMA 셀룰러 전화기와 PCS 전화기를 이용하여 사무실 내부 발착신호 뿐만 아니라 유선전화망 발착신호 및 이동통신망으로부터 착신호 서비스를 제공 받는다. 한편 외부 가입자가 (2) 영역으로 진입할 경우 CDMA 무선사설교환기/키폰시스템의 서비스를 받지 않도록 이동통신망 기지국에 접속을 유지한다.1 shows the shape of an overlapping cell constituted by a CDMA wireless private exchange / keyphone system to which the present invention is applied. (1) indicates an area serviced by a base station of a mobile communication network, and a CDMA radio private switch / keyphone system using a CDMA frequency channel in which a specific part of the service area is not used by a neighboring mobile communication network base station as shown in (2). Consists of overlapping cells. In the area (1), home subscribers and external subscribers are provided with a communication service through a base station of a mobile communication network. When the home subscriber enters the area (2), the frequency channel switching procedure of FIG. 3 is followed to automatically switch to the CDMA frequency channel allocated to the overlapping cell without user intervention. After the home subscriber's terminal is switched to the CDMA frequency channel used by the CDMA wireless private exchange / keyphone system, CDMA cellular telephones and PCS telephones are used to provide incoming and outgoing services from landline and mobile telephone networks as well as internal and external signals. Get provided. On the other hand, when the external subscriber enters the area (2), it maintains access to the mobile communication network base station so that the CDMA wireless private exchange / keyphone system is not served.

홈 가입자와 외부 가입자를 구분하여 로밍제어 기능을 수행하기 위한 CDMA 무선사설교환기/키폰시스템의 로밍 제어기능 블록을 제 2 도에 나타내었다.A roaming control function block of a CDMA wireless private exchange / keyphone system for distinguishing a home subscriber from an external subscriber and performing a roaming control function is shown in FIG.

기지국 순방향링크 모니터부(1)는 이동통신망의 파일럿/동기/호출채널을 복조하여 해당 채널의 정보를 추출한다. 주변 이동통신망 기지국의 파일럿 채널을 탐색하여 일정 레벨 이상의 신호로 수신된 파일럿채널 신호의 PN 옵셋 및 신호크기정보를 시스템 제어부로 전달한다. 동기채널의 시스템 시각정보 및 긴코드 상태정보 등을 추출하여 시스템 제어부로 전달함으로써 CDMA 무선사설교환기/키폰시스템의 시스템 동기클럭을 생성하는데 사용한다. 또한 호출채널을 통해 전송되는 단말기 착신호출 메시지들 가운데 CDMA 무선사설교환기/키폰시스템에 진입하여 등록된 홈 가입자의 착신 호출 여부를 감시한다.The base station forward link monitor unit 1 demodulates the pilot / synchronous / calling channel of the mobile communication network and extracts information of the corresponding channel. The PN offset and signal size information of the pilot channel signal received as a signal of a predetermined level or higher are transmitted to the system controller by searching for the pilot channel of the neighboring mobile communication network base station. It extracts the system time information and long code status information of the synchronization channel and transfers it to the system control unit to generate the system synchronization clock of the CDMA wireless private exchange / keyphone system. In addition, among incoming terminal outgoing messages transmitted through the calling channel, the CDMA enters the CDMA system and monitors whether the registered home subscriber is called.

채널변환 명령부(2)는 홈 가입자가 제 1 도의 (1) 영역에서 (2) 영역으로 진입할 때, 이동통신망 기지국에 중첩 셀로써 형성되는 CDMA 무선사설교환기/키폰시스템에 할당된 CDMA 주파수 채널로 채널변경을 위한 채널할당메시지를 해당 단말기에 전송한다. 이를 위해 기지국 순방향링크 모니터부의 파일럿채널 탐색결과를 이용한다. 주변 이동통신망 기지국으로부터 수신된 파일럿 신호들과 PN 옵셋을 달리한 파일럿 신호를 주변 기지국 파일럿 신호 크기보다 일정 레벨 크게 전송하고 이 파일럿채널 신호와 PN 위상동기를 맞추어 동기채널 및 호출채널을 전송함으로써, 홈 가입자가 CDMA 무선사설교환기/키폰시스템으로 유휴 핸드오버 되도록 유도한다.The channel conversion command unit 2 is a CDMA frequency channel allocated to a CDMA radio private exchange / keyphone system formed as an overlapping cell in a mobile communication network base station when a home subscriber enters the area (1) from the area (1) of FIG. 1. The channel assignment message for channel change is transmitted to the corresponding terminal. For this purpose, the pilot channel search result of the base station forward link monitor is used. By transmitting a pilot signal received from a neighboring mobile communication network base station and a PN offset different from a neighboring base station pilot signal by a certain level, and transmitting a synchronization channel and a call channel according to the pilot channel signal and PN phase synchronization, Induce subscribers to idle handover to the CDMA wireless private exchange / keyphone system.

액세스채널 수신부(3)는 제 1 도의 (1) 영역에서 (2) 영역으로 진입한 홈 가입자와 외부 가입자가 CDMA 무선사설교환기/키폰시스템으로 유휴 핸드오버를 수행한 후, 호출채널메시지를 통해 수신된 시스템 오버헤드 정보들 가운데 위치등록에 관련된 일부의 파라미터들이 변경된 것을 발견했을 때 전송하는 위치등록 요구메시지를 수신하여 시스템 제어부로 전달한다.The access channel receiving unit 3 receives a home channel and an external subscriber who have entered the area (1) to (2) in FIG. 1 after performing idle handover to the CDMA wireless private exchange / keyphone system, and then receives the call channel message. When it is found that some of the parameters related to location registration among the system overhead information are changed, a location registration request message transmitted is received and transmitted to the system controller.

채널 뱅크부(4)는 CDMA 무선사설교환기/키폰시스템의 서비스영역에 존재하는홈 가입자의 단말기에 대한 발착신호를 처리하기 위한 일련의 기지국 변복조 채널들로 구성된다.The channel bank section 4 is composed of a series of base station modulation / demodulation channels for processing an incoming and outgoing signal for a terminal of a home subscriber existing in a service area of a CDMA wireless private exchange / keyphone system.

시스템 제어부(5)는 기지국 순방향링크 모니터부의 파일럿채널 탐색결과를 분석하여 주변 이동통신망 기지국으로부터 수신된 파일럿 신호들과 PN 옵셋을 달리하는 파일럿 신호의 PN 옵셋과 신호레벨을 선택한다. 액세스채널 수신부를 통해 전달 받은 위치등록 메시지들 가운데 홈 가입자의 것인 경우 해당 단말기의 위치등록 응답 메시지 및 CDMA 주파수 채널 변경을 요구하는 채널할당 메시지를 생성하여 채널변환 명령부에 전달한다. 외부 가입자의 것인 경우 위치등록 응답 메시지만을 생성하여 채널변환 명령부에 전달함으로써 해당 단말기가 이동통신망 기지국에 접속을 유지할 수 있도록 한다. 또한 기지국 순방향링크 모니터부의 호출채널 감시기능을 통해 수신된 착신 호출이 CDMA 무선사설교환기/키폰시스템에 진입하여 등록된 홈 가입자를 포함하는 경우 CDMA 무선사설교환기/키폰시스템의 내부 호출 메시지로 변환하여 채널 뱅크부를 통해 홈 가입자에게 전송한다The system controller 5 analyzes the pilot channel search results of the base station forward link monitor and selects the PN offset and signal level of the pilot signal having a PN offset different from the pilot signals received from the neighboring mobile communication network base stations. In the case of the home subscriber among the location registration messages received through the access channel receiving unit, a location registration response message of the terminal and a channel assignment message requesting the CDMA frequency channel change are generated and transmitted to the channel conversion command unit. In case of an external subscriber, only the location registration response message is generated and transmitted to the channel conversion command unit so that the corresponding terminal can maintain the connection to the mobile communication network base station. In addition, when the incoming call received through the call channel monitoring function of the base station forward link monitor includes a home subscriber registered by entering the CDMA wireless private exchange / keyphone system, the channel is converted into an internal call message of the CDMA wireless private exchange / keyphone system. Send to home subscriber through bank

제 3 도는 CDMA 무선사설교환기/키폰시스템의 서비스 영역으로 로밍하는 홈 가입자의 CDMA 주파수 채널 변경절차를 나타내었다. 이 경우 채널명령변환부의 수행기능에 의해 이동단말기는 이동통신망 기지국에서 전송하는 파일럿채널 신호(1)보다 CDMA 무선사설교환기/키폰시스템에서 전송하는 파일럿채널 신호(2)를 일정레벨 크게 수신함으로써 CDMA 무선사설교환기/키폰시스템으로 유휴 핸드오프(3) 된다. 이동단말기는 호출채널메시지를 통해 수신된 시스템 오버헤드 정보들 가운데 위치등록에 관련된 일부의 파라미터들이 변경된 것을 발견했을 때 전송하는 위치등록 요구메시지(4)를 전송한다. 액세스채널 수신부를 통해 위치등록 요구메시지를 전달 받은 시스템 제어부는 해당 메시지를 전송한 이동단말기가 홈 가입자(5)인 경우 위치등록 응답메시지(6) 및 호출채널의 CDMA 주파수 채널 변경을 요구하는 채널할당 메시지(7)를 전송한다. 한편 시스템 제어부는 외부 가입자로부터 위치등록 요구 메시지를 수신한 경우 위치등록 응답메시지만을 이동단말기에 전송한다. 이동통신망 기지국으로부터 CDMA 무선사설교환기/키폰시스템에 진입한 홈 가입자에 대한 착신 호출(8)이 발생한 경우 이를 CDMA 무선사설교환기/키폰시스템의 내부 호출 메시지(9)로 변환하여 이동단말기에 전송한다3 shows a procedure for changing a CDMA frequency channel of a home subscriber roaming to a service area of a CDMA wireless private exchange / keyphone system. In this case, the mobile terminal receives the pilot channel signal 2 transmitted by the CDMA wireless private exchange / keyphone system by a predetermined level larger than the pilot channel signal 1 transmitted by the mobile communication network base station. Idle handoff (3) to the private exchange / keyphone system. The mobile terminal transmits a location registration request message 4 which is transmitted when it finds that some parameters related to location registration among the system overhead information received through the call channel message have changed. The system control unit receiving the location registration request message through the access channel receiving unit allocates a channel for requesting the CDMA frequency channel change of the location registration response message 6 and the call channel when the mobile terminal that transmits the message is the home subscriber 5. Send a message (7). On the other hand, when receiving a location registration request message from the external subscriber, the system control unit transmits only the location registration response message to the mobile terminal. When an incoming call 8 for a home subscriber entering the CDMA wireless private branch exchange / keyphone system is generated from the mobile communication network base station, it is converted into an internal call message (9) of the CDMA wireless private exchange / keyphone system and transmitted to the mobile terminal.

CDMA 무선사설교환기/키폰시스템의 채널변환 명령부는 외부 가입자에 대하여 이동통신망 기지국에서 CDMA 무선사설교환기/키폰시스템으로 유휴 핸드오프를 유도함으로써 통화차단 효과가 있으므로 사무실의 출입구와 같은 한정된 영역에서만 동작하도록 제한한다.The channel switching command of the CDMA wireless private exchange / keyphone system has a call blocking effect by inducing idle handoff from the mobile communication network base station to the CDMA wireless private exchange / keyphone system for external subscribers, so it is restricted to operate only in a limited area such as an entrance to an office. do.

사설 기지국 역할을 수행하는 CDMA 무선사설교환기/키폰시스템을 이동통신망 기지국의 서비스 영역에 별도의 CDMA 주파수채널을 사용하는 중첩 셀로써 구성하여, 홈 가입자는 CDMA 셀룰러 단말기와 PCS 단말기를 통해 시스템 내부 발착신호 서비스 뿐만 아니라 유선전화망 접속 서비스를 제공 받는다. 또한 CDMA 무선사설교환기/키폰시스템과 이동통신망을 연결하는 유선링크 없이도 이동통신망으로부터 착신호 서비스를 수용한다. 외부 가입자는 CDMA 무선사설교환기/키폰시스템의 서비스를 이용하지 않고 이동통신망 기지국에 접속하도록 제어함으로써 중첩 셀의 영향을받지 않도록 한다.A CDMA wireless private exchange / keyphone system acting as a private base station is configured as an overlapping cell using a separate CDMA frequency channel in the service area of a mobile communication base station. In addition to the service, wired network access is provided. It also accepts incoming call service from mobile communication network without wired link between CDMA wireless private exchange / keyphone system and mobile communication network. The external subscriber is controlled from the overlapping cell by controlling access to the mobile communication base station without using the service of the CDMA wireless private exchange / keyphone system.

Claims (3)

CDMA 셀룰러 전화기와 PCS 전화기를 단말기로 이용하는 CDMA 무선사설교환기 /키폰시스템에서 이동통신망 기지국의 서비스 영역에 별도의 CDMA 주파수채널을 사용하는 중첩 셀을 구성하여, 홈 가입자는 사설망 내부 발착신호 서비스 뿐만 아니라 유선전화망 접속 서비스 및 이동통신망으로부터 착신호 서비스를 제공 받으며, 외부 가입자는 CDMA 무선사설교환기/키폰시스템의 서비스를 이용하지 않고 이동통신망 기지국에 접속하는 것을 특징으로 하는 가입자에 다한 로밍제어 방법In a CDMA wireless private exchange / keyphone system using CDMA cellular telephones and PCS telephones as terminals, by configuring an overlapping cell using a separate CDMA frequency channel in the service area of a mobile communication network base station, home subscribers are not only wired into the private network. A roaming control method for a subscriber, characterized in that an incoming call service is provided from a telephone network access service and a mobile communication network, and an external subscriber accesses a mobile communication network base station without using a service of a CDMA wireless private exchange / keyphone system. 상기 1 항에 있어서, 주변 이동통신망 기지국의 파일럿 채널을 탐색하여 일정 레벨 이상의 신호로 수신된 파일럿채널 신호의 PN 옵셋 및 신호크기정보를 획득하고, 동기채널의 시스템 시각정보 및 긴코드 상태정보 등을 획득하며, 호출채널을 통해 전송되는 단말기 착신호출 메시지들 가운데 CDMA 무선사설교환기/키폰시스템에 진입하여 등록된 홈 가입자의 착신 호출을 감시하는 기지국 순방향링크 모니터수단과,The method of claim 1, wherein the PN offset and signal size information of a pilot channel signal received as a signal of a predetermined level or more are acquired by searching for a pilot channel of a neighboring mobile communication network base station, and system time information and a long code state information of a synchronization channel are obtained. A base station forward link monitor means for acquiring and entering a CDMA wireless private exchange / keyphone system among the terminal outgoing messages transmitted through a calling channel and monitoring an incoming call of a registered home subscriber; 주변 이동통신망 기지국으로부터 수신된 파일럿 신호들과 PN 오프셋을 달리한 파일럿 신호를 주변 기지국 파일럿 신호크기보다 일정 레벨 강하게 전송하고, 이 파일럿채널 신호와 PN 위상동기를 맞추어 동기채널 메시지를 전송하며, CDMA 무선사설교환기/키폰시스템에 할당된 CDMA 주파수 채널로 채널변경을 요구하는 채널할당메시지를 호출채널을 전송함으로써, 홈 가입자를 CDMA 무선사설교환기/키폰시스템으로 유휴 핸드오버를 유도하는 채널변환명령수단,A pilot signal received from a neighboring mobile communication network base station and a pilot signal having a different PN offset are transmitted at a predetermined level stronger than that of the neighboring base station pilot signal, and the synchronization channel message is transmitted in accordance with the pilot channel signal and the PN phase synchronization. Channel conversion command means for inducing an idle handover to a CDMA wireless private exchange / keyphone system by transmitting a call channel with a channel assignment message requesting a channel change to a CDMA frequency channel assigned to the private exchange / keyphone system; CDMA 무선사설교환기/키폰시스템으로 유휴 핸드오버를 수행한 홈 가입자와 외부 가입자의 위치등록 요구메시지를 수신하는 액세스채널 수신수단,An access channel receiving means for receiving a location registration request message between a home subscriber and an external subscriber who has performed an idle handover to a CDMA wireless private exchange / keyphone system; 기지국 순방향링크 모니터부의 파일럿채널 탐색결과를 분석하여 주변 이동통신망 기지국으로부터 수신된 파일럿 신호들과 PN 옵셋을 달리하는 파일럿 신호의 PN 옵셋과 신호크기를 선택하고, 액세스채널 수신수단을 통해 전달된 위치등록 메시지들 가운데 홈 가입자의 위치등록 응답메시지와 CDMA 주파수 채널 변경을 요구하는 채널할당 메시지를 생성하며, CDMA 무선사설교환기/키폰시스템에 등록된 홈 가입자를 포함하는 착신 호출메시지를 CDMA 무선사설교환기/키폰시스템의 내부 호출 메시지로 변환하는 시스템제어수단Analyze the pilot channel search results of the base station forward link monitor to select the PN offset and signal size of the pilot signal that differs from the pilot signals received from the neighboring mobile communication network base stations and the PN offset, and register the location transmitted through the access channel receiving means. Among the messages, a home subscriber's location registration response message and a channel assignment message requesting a CDMA frequency channel change are generated, and an incoming call message including a home subscriber registered in the CDMA wireless private exchange / keyphone system is a CDMA wireless private exchange / keyphone. System control means for converting system internal call message 상기 1 항에 있어서, 이동단말기가 이동통신망 기지국에서 전송하는 파일럿채널 신호보다 CDMA 무선사설교환기/키폰시스템에서 전송하는 파일럿채널 신호를 일정레벨 크게 수신하여 CDMA 무선사설교환기/키폰시스템으로 유휴 핸드오프 되도록 유도하고, 이동단말기가 호출채널메시지를 통해 수신한 시스템 오버헤드 정보들 가운데 위치등록에 관련된 일부의 파라미터들이 변경된 것을 발견했을 때 전송하는 위치등록 요구메시지를 CDMA 무선사설교환기/키폰시스템에서 수신한 후, 홈 가입자로부터 위치등록 요구메시지를 수신한 경우 위치등록 응답메시지 및 호출채널의 CDMA 주파수 채널변경을 요구하는 채널할당 메시지를 전송하는 한편, 외부 가입자로부터 위치등록 요구메시지를 수신한 경우 위치등록 응답메시지만을 이동단말기에전송하며, 이동통신망 기지국으로부터 CDMA 무선사설교환기/키폰시스템에 진입한 홈 가입자에 대한 착신 호출이 발생한 경우 이를 CDMA 무선사설교환기/키폰시스템의 내부 호출 메시지로 변환하여 이동단말기에 전송하는 것을 특징으로하는 가입자에 대한 로밍제어 방법The method according to claim 1, wherein the mobile terminal receives a pilot channel signal transmitted from the CDMA wireless private exchange / keyphone system at a predetermined level larger than the pilot channel signal transmitted from the mobile communication network base station so that the mobile terminal idles off the CDMA wireless private exchange / keyphone system. After receiving the location registration request message from the CDMA wireless private exchange / keyphone system when the mobile terminal detects that some parameters related to location registration among the system overhead information received through the call channel message have been changed. If a location registration request message is received from a home subscriber, a location registration response message and a channel assignment message requesting a CDMA frequency channel change of a calling channel are transmitted, while a location registration response message is received from an external subscriber. Send only to mobile terminal, Roaming for subscribers, when an incoming call to a home subscriber that enters a CDMA wireless private exchange / keyphone system from a network base station occurs, it is converted into an internal call message of the CDMA wireless private exchange / keyphone system and transmitted to the mobile terminal. Control method
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KR100842150B1 (en) * 2005-01-12 2008-06-27 가시오 히타치 모바일 커뮤니케이션즈 컴퍼니 리미티드 Mobile communication terminal, mobile communication system, and storage medium
KR100883023B1 (en) 2007-06-29 2009-02-13 주식회사 케이티프리텔 System and method for providing private network service

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