KR20040001322A - Operating apparatus for cell of mobile telecommunication system - Google Patents

Operating apparatus for cell of mobile telecommunication system Download PDF

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Publication number
KR20040001322A
KR20040001322A KR1020020036477A KR20020036477A KR20040001322A KR 20040001322 A KR20040001322 A KR 20040001322A KR 1020020036477 A KR1020020036477 A KR 1020020036477A KR 20020036477 A KR20020036477 A KR 20020036477A KR 20040001322 A KR20040001322 A KR 20040001322A
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South Korea
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cell
base station
mobile base
mobile
mobile communication
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KR1020020036477A
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Korean (ko)
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최윤석
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엘지전자 주식회사
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Priority to KR1020020036477A priority Critical patent/KR20040001322A/en
Publication of KR20040001322A publication Critical patent/KR20040001322A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/10—Reselecting an access point controller
    • 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
    • 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
    • H04W88/12—Access point controller devices

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

Abstract

PURPOSE: A system for operating cells in a mobile communication system is provided to install mobile base stations in mass transport means so that the right to control terminals can be turned over through interfacing between mobile base stations and RNCs(Radio Network Controllers). CONSTITUTION: A system for operating cells in a mobile communication system consists of a mobile base station(212), RNCs(221-226), and MSCs(Mobile Switching Centers)(231-233). The mobile base station(212), installed in a transport means(210), is selected as the cell of a user terminal(211). When the transport means(210) moves, the mobile base station(212) turns over the control right of the user terminal(211) by connection reestablishment with the RNCs(221-226). The RNCs(221-226) have the control right of the mobile base station(212). The MSCs(231-233), interfaced with the RNCs(221-226), construct a mobile communication system.

Description

이동통신 시스템의 셀 운용장치{OPERATING APPARATUS FOR CELL OF MOBILE TELECOMMUNICATION SYSTEM}Cell operating device of mobile communication system {OPERATING APPARATUS FOR CELL OF MOBILE TELECOMMUNICATION SYSTEM}

본 발명은 이동통신 시스템에서 교통수단을 이용하여 셀을 운용하는 기술에 관한 것으로, 특히 대중교통 수단에 이동 기지국을 장착하여 교통수단을 통해 이동하고 있는 사용자의 단말기의 셀 재 선택과정을 줄일 수 있도록 한 이동통신 시스템의 셀 운용장치에 관한 것이다.The present invention relates to a technology for operating a cell using a transport in a mobile communication system, and in particular, to reduce the cell reselection process of a user terminal moving through a transport by mounting a mobile base station in a public transport; A cell operating device of a mobile communication system.

사용자가 이동통신 단말기를 이용하여 서비스를 받을 때 그 단말기는 이동통신 시스템의 기지국과 무선 인터페이스를 수행하게 되는데, 이를 위해 그 단말기는 가장 수신 신호 강도가 양호한 셀을 선택하여 그 셀을 통해 서비스를 받을 수 있도록 한다. 이때, 사용자가 계속 움직이면 상기 단말기는 수신 강도가 더 양호한 셀을 찾아 재 선택하여야 한다. 만약, 사용자가 교통수단 등을 이용하여 더욱 빠르게 이동하는 경우에는 셀 재 선택의 빈도도 그만큼 높아지게 된다.When a user receives a service using a mobile communication terminal, the terminal performs a radio interface with a base station of the mobile communication system. For this purpose, the terminal selects a cell having the best received signal strength and receives a service through the cell. To help. At this time, if the user keeps moving, the terminal should find and reselect a cell having better reception strength. If the user moves faster by using a vehicle or the like, the frequency of cell reselection is increased accordingly.

따라서, 종래의 셀 운용 장치에 있어서는 커버리지(coverage)가 다른 셀들로 무선망의 셀을 설계하여, 이동속도가 빠른 사용자 단말기는 더 큰 커버리지를 갖는 셀을 선택하도록 함으로써 셀 재 선택의 빈도를 작게 할 수 있었다. 하지만, 이와 같은 경우 서로 다른 커버리지를 갖는 셀들과의 신호에 대한 수신 강도를 비교하여 셀을 재 선택하는 알고리즘이 복잡해지고, 각기 다른 커버리지를 갖는 셀들에 대해 효과적으로 서비스 레벨을 운영하는데 어려움이 있었다.Therefore, in a conventional cell operating apparatus, cells of a wireless network are designed with cells having different coverages, so that a user terminal having a fast moving speed selects a cell having a larger coverage, thereby reducing the frequency of cell reselection. Could. However, in such a case, an algorithm for reselecting a cell by comparing reception strengths of signals with cells having different coverages becomes complicated, and it is difficult to effectively operate a service level for cells having different coverages.

상기와 같이 셀 재 선택을 위해 가장 적합한 셀을 찾을 때, 해당 단말기에서는 수신된 신호 강도에 따라 순차적으로 이웃하는 셀들의 시스템 정보를 읽은 후 이를 근거로 적합한 셀인지를 판단하는 것이 아니라, 셀 재선택 기준(Cell reselection criteria)을 만족하는 이웃하는 셀들의 측정된 신호 강도를 시스템으로 리포팅하면 시스템에서 해당 단말기에 가장 적합한 셀을 판단하여 단말기에 그 셀에 대한 정보를 전달한다. 이에 따라 해당 단말기는 전달된 셀 정보를 이용하여 그 셀에 캠핑(camping)하게 된다.When finding the most suitable cell for cell reselection as described above, the corresponding terminal sequentially reads system information of neighboring cells according to the received signal strength and then does not determine whether the cell is a suitable cell based on the received signal strength. When the measured signal strengths of neighboring cells that satisfy the cell reselection criteria are reported to the system, the system determines the most suitable cell for the corresponding terminal and delivers information about the cell to the terminal. Accordingly, the terminal camps in the cell using the transmitted cell information.

도 1은 N명의 단말기 사용자가 동일한 교통수단에 탑승하여 고속으로 이동하는 경우 종래 기술에 의한 셀 운용방법을 나타낸 것이다. 단말기(111)들이 셀의 경계를 지나게 될 때마다 셀 즉, 고정기지국(121-126) 중에서 임의의 고정 기지국을 재 선택하게 된다. 상기 고정기지국(121-126)은 그들을 제어하는 무선망 제어기(RNC: Radio Network Controller)(131-136), 이동전화교환기(MSC: Message Switchig Center)(141-143) 등과 함께 이동 통신 시스템을 이룬다. 상기 단말기(111)는 상기와 같은 이동통신 시스템과 인터페이스를 수행하여 이동통신 서비스를 제공받게 된다.1 illustrates a cell operating method according to the prior art when N terminal users travel at high speed in the same transportation. Each time the terminal 111 crosses a cell boundary, it reselects any fixed base station among the cells, that is, the fixed base stations 121-126. The fixed base stations 121-126 form a mobile communication system together with Radio Network Controller (RNC) 131-136, Message Switchig Center (MSC) 141-143, and the like that control them. . The terminal 111 is provided with a mobile communication service by performing an interface with the mobile communication system as described above.

그러나, 이와 같은 종래 이동통신 시스템의 셀 운용장치에 있어서, 고정기지국의 경계에서 N개의 단말기가 모두 셀을 재 선택하여야 하는데, 그 단말기의 이동 속도가 고속일 경우에는 셀 재선택의 빈도가 그만큼 높아지게 되는 문제점이 있었다.However, in the cell operating apparatus of the conventional mobile communication system, all N terminals must reselect a cell at the boundary of the fixed base station, and the frequency of cell reselection is increased when the terminal moves at a high speed. There was a problem.

따라서, 본 발명의 목적은 대중교통 수단에 이동 기지국을 설치하여, 단말기들의 제어권 이양이 이동기지국과 무선망 제어기간의 인터페이스에 의해 수행되는 이동통신 시스템의 셀 운용장치를 제공함에 있다.Accordingly, an object of the present invention is to provide a cell operating apparatus of a mobile communication system in which a mobile base station is installed in a public transportation means, and the transfer of control rights of terminals is performed by an interface between a mobile base station and a wireless network controller.

도 1은 종래 기술에 의한 이동통신 시스템의 셀 운용장치의 블록도.1 is a block diagram of a cell operating apparatus of a mobile communication system according to the prior art.

도 2는 본 발명에 의한 이동통신 시스템의 셀 운용장치의 블록도.2 is a block diagram of a cell operating apparatus of a mobile communication system according to the present invention;

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

210 : 교통수단211 : 단말기210: means of transportation 211: terminal

212 : 이동기지국221-226 : 무선망 제어기212: mobile base station 221-226: wireless network controller

231-233 : 이동전화교환기231-233: Mobile Telephone Exchange

도 2는 본 발명에 의한 이동통신 시스템의 셀 운용장치의 일실시 구현예를 보인 블록도로서 이에 도시한 바와 같이, 교통수단(210)에 설치되어 탑승한 사용자 단말기(211)의 셀로 선택되고, 그 교통수단(210)이 이동될 때, 셀 재선택이 이루어지는 것이 아니라 무선망 제어기(221-226)와의 연결이 재 설정되는 이동기지국(212)과; 상기 이동기지국(212)의 제어권을 갖는 무선망 제어기(221-226)와; 상기 무선망 제어기(221-226)와 연계하여 이동통신 시스템을 구축하는 이동전화교환기(231-233)로 구성한 것으로, 이와 같은 본 발명의 작용을 상세히 설명하면 다음과 같다.Figure 2 is a block diagram showing an embodiment of a cell operating apparatus of the mobile communication system according to the present invention, as shown in this, is selected as a cell of the user terminal 211 installed in the transportation means 210, A mobile base station 212, in which the cell reselection is not made when the transportation means 210 is moved, but the connection with the radio network controllers 221-226 is reset; A radio network controller (221-226) having control of the mobile base station (212); It is composed of a mobile telephone exchange (231-233) for establishing a mobile communication system in conjunction with the wireless network controller (221-226), the operation of the present invention in detail as follows.

버스, 지하철,기차 등의 각 교통수단(210) 내에 이동기지국(212)을 설치하여, 이동통신 서비스를 제공받는 사용자가 그 교통수단(210)을 이용하여 이동하는 경우 사용자의 단말기(211)가 그 이동기지국(212)을 셀로 선택하고, 해당 시점에서 이동기지국(212)과 해당 무선망 제어기(221-226)의 연결이 재 설정되므로 그 단말기(211)가 셀을 재 선택하지 않고도 이동통신 서비스를 계속 제공받을 수 있게 된다. 이를 위해 상기 이동 기지국(212)과 이동 통신 시스템과 무선 인터페이스를 통하여 해당 이동 기지국을 셀로 선택한 사용자들의 정보를 공유할 수 있어야 한다.A mobile base station 212 is installed in each transportation means 210 such as a bus, subway, or train, so that a user who is provided with a mobile communication service moves by using the transportation means 210. Since the mobile base station 212 is selected as a cell and the connection between the mobile base station 212 and the radio network controllers 221-226 is reestablished at that time, the mobile communication service is performed without the terminal 211 reselecting the cell. You will continue to be provided. To this end, the mobile base station 212 and the mobile communication system and the user should be able to share the information of the user who selected the mobile base station as a cell through the air interface.

예를 들어, 상기 교통수단(210)이 도 2에서와 같이 위치하여 상기 이동기지국(212)의 영역권 내에 있는 N개 단말기(211)들의 제어권이 무선망 제어기(221)에있는 상태에서, 이 교통수단(210)이 임의의 방향(예:우측 방향)으로 이동하면 그 단말기(211)들의 제어권이 무선망 제어기(221)에서 무선망 제어기(222)로 이양된다.For example, in the state where the transportation means 210 is located as shown in FIG. 2 and the control right of the N terminals 211 within the area range of the mobile base station 212 is in the wireless network controller 221, the traffic is controlled. When the means 210 moves in any direction (eg, right direction), control of the terminals 211 is transferred from the wireless network controller 221 to the wireless network controller 222.

이와 같이 종래에는 제어권의 이양이 각각의 단말기에서 수행되지만, 본 발명에서는 이동기지국(232)과 무선망 제어기(221-226)간의 인터페이스에 의해 수행되는 것을 알 수 있다. 이렇게 하면 종래에 비하여 셀 재 선택과정이 훨씬 줄어든다.As described above, the transfer of the control right is conventionally performed in each terminal, but it can be seen that the present invention is performed by the interface between the mobile base station 232 and the radio network controllers 221-226. This significantly reduces the cell reselection process as compared to the prior art.

이상에서 상세히 설명한 바와 같이 본 발명은 대중교통 수단에 이동 기지국을 설치하여, 단말기들의 제어권 이양이 이동기지국과 무선망 제어기간의 인터페이스에 의해 이루어지도록 함으로써, 불필요한 셀 재 선택과정이 줄어들어 효과적인 셀 운영이 가능하게 된다.As described in detail above, the present invention provides a mobile base station in a public transportation means, so that the transfer of control rights of terminals is performed by an interface between a mobile base station and a wireless network controller, thereby reducing unnecessary cell reselection processes, thereby effectively operating a cell. It becomes possible.

Claims (2)

교통수단에 설치되어 단말기의 셀로 선택되고, 그 교통수단이 이동될 때 무선망 제어기와의 연결 재 설정으로 단말기의 제어권을 이양하는 이동기지국과; 이동전화교환기와 이동통신 시스템을 구축하고, 상기 이동기지국의 제어권을 갖는 무선망 제어기를 포함하여 구성한 것을 특징으로 하는 이동통신 시스템의 셀 운용장치.A mobile base station installed in a transportation means and selected as a cell of the terminal and transferring control of the terminal by re-establishing connection with the wireless network controller when the transportation means is moved; And a wireless network controller having a control right of the mobile base station. 제1항에 있어서, 교통수단은 버스,지하철,기차 중 어느 하나의 대중교통수단인 것을 특징으로 하는 이동통신 시스템의 셀 운용장치.The cell operating apparatus of claim 1, wherein the transportation means is any one of public transportation means such as a bus, subway, and train.
KR1020020036477A 2002-06-27 2002-06-27 Operating apparatus for cell of mobile telecommunication system KR20040001322A (en)

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Publication number Priority date Publication date Assignee Title
KR20030088830A (en) * 2002-05-13 2003-11-20 박연수 Simple gravity pumping method and device

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Publication number Priority date Publication date Assignee Title
JPH0555991A (en) * 1991-08-23 1993-03-05 Nippon Telegr & Teleph Corp <Ntt> Position registration system
JPH09327057A (en) * 1996-06-06 1997-12-16 Hitachi Ltd Mobile communication system and its communication control method
JPH1146380A (en) * 1997-07-28 1999-02-16 Nec Corp Mobile communication system of cellular system
JPH11355835A (en) * 1998-06-09 1999-12-24 Nec Corp Position registration method for mobile communication system
JP2002111702A (en) * 2000-09-29 2002-04-12 Railway Technical Res Inst Mobile communication device, system thereof and method therefor
JP2002152804A (en) * 2000-11-10 2002-05-24 Ntt Docomo Inc Position registration device, position registration method and mobile communication network
KR20020065001A (en) * 2000-11-16 2002-08-10 엔티티 도꼬모 인코퍼레이티드 Method of registering position of mobile communication terminal, general calling method for mobile communication terminal and mobile communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030088830A (en) * 2002-05-13 2003-11-20 박연수 Simple gravity pumping method and device

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