KR100265532B1 - Rp(radio port) in wll - Google Patents
Rp(radio port) in wll Download PDFInfo
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- KR100265532B1 KR100265532B1 KR1019980027356A KR19980027356A KR100265532B1 KR 100265532 B1 KR100265532 B1 KR 100265532B1 KR 1019980027356 A KR1019980027356 A KR 1019980027356A KR 19980027356 A KR19980027356 A KR 19980027356A KR 100265532 B1 KR100265532 B1 KR 100265532B1
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/12—Messaging; Mailboxes; Announcements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/14—WLL [Wireless Local Loop]; RLL [Radio Local Loop]
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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Abstract
본 발명은 가입자망을 무선으로 제공하는 무선가입자망(WLL) 시스템의 기지국장치(RP : Radio Port)에 관한 것이다. 2.3∼2.4GHz 주파수대역에서 작동하는 광대역 코드분할다중접속(W-CDNLA) 방식의 WLL 기지국장치는 WLL 가입자 단말기에게 무선채널을 제공하여, 개개의 WLL가입자단말기로부터 전달되는 호 제어신호 및 트래픽데이터를 E1링크를 통해 기지국제어장치로 전송한다. WLL 기지국장치의 구조는 RCP(RP Control Processor Unit), RF 모듈, 아날로그 인터페이스 모듈, CCU(Channel Control Unit), LCU(Link Control Unit), RDU(Reference Clock Distribution Unit), ElRPC(El Interface for RPC)로 구성된다. 기지국장치 내부 모듈간의 통신은 ATM 셀을 이용한 IPC(Inter Processor Communication) 프로토콜로 이루어지게 된다. IPC통신은 ATM 셀을 이용하여 같은 쉘프 안에서는 셀버스를 이용하여 병렬로 메시지를 교환하고, 각 쉘프간은 직렬방식으로 메시지를 교환한다. 이를 위해서 송신측에서는 셀프 안에 병렬-직렬 블록이 구성되며, 수신측에서는 셀프안에 직렬-병렬 블록이 구성된다.The present invention relates to a base station apparatus (RP: Radio Port) of a wireless subscriber network (WLL) system for providing a subscriber network wirelessly. A WLL base station apparatus of a wideband code division multiple access (W-CDNLA) system operating in the 2.3 to 2.4 GHz frequency band provides a wireless channel to a WLL subscriber station, and transmits call control signals and traffic data transmitted from individual WLL subscriber terminals. Transmit to base station controller through E1 link. The structure of the WLL base station unit is a RP control processor unit (RCP), an RF module, an analog interface module, a channel control unit (CCU), a link control unit (LCU), a reference clock distribution unit (RDU), and an El interface for RPC (ElRPC). It consists of. The communication between the modules of the base station device is made by the IPC (Inter Processor Communication) protocol using the ATM cell. IPC communication uses ATM cells to exchange messages in parallel on the same shelf using Cellbus, and each shelf exchanges messages in a serial fashion. To this end, a parallel-serial block is configured in the shelf at the transmitter, and a serial-parallel block is configured in the shelf at the receiver.
Description
본 발명은 기지국장치에 관한 것으로서, 특히 가입자망을 무선으로 제공하는 WLL 시스템의 기지국장치(RP:Radio Port)에 관한 것이다.The present invention relates to a base station apparatus, and more particularly, to a base station apparatus (RP: Radio Port) of a WLL system for providing a subscriber network wirelessly.
국내 이동통신 분야에서 상용화되어 있는 기지국장치는 협대역 코드분할 다중접속(Narrowband CDMA) 방식을 이용한 디지털 셀룰라 및 PCS 서비스용 기지국장치가 있다. 이 방식은 국제표준 규격인 IS-95 및 IS-95A를 적용하고 있으며 주파수효율 면에서 어느 정도 개선된 효과는 있으나 음성부호화 방식이 8k-QCELP 및 13k-QCELP로서 음성품질이 다소 떨어지며 데이터 전송률이 9.6kbps이하로 제한된다. 또한 기존의 디지털 셀룰라 시스템이나 PCS 시스템에 구현된 기지국장치에서는 쉘프와 쉘프 사이는 물론이고 동일한 쉘프 안에서도 직렬 접속을 사용하므로써 메시지 전송효율이 다소 떨어진다.BACKGROUND OF THE INVENTION A base station apparatus commercially available in the domestic mobile communication field includes a base station apparatus for digital cellular and PCS services using narrowband code division multiple access (Narrowband CDMA). This method adopts the international standard IS-95 and IS-95A, and has some improvement in frequency efficiency, but the voice encoding method is 8k-QCELP and 13k-QCELP, so the voice quality is slightly lowered and the data rate is 9.6. It is limited to less than kbps. In addition, in the base station apparatus implemented in the existing digital cellular system or PCS system, the message transmission efficiency is somewhat reduced by using a serial connection in the same shelf as well as between the shelf and the shelf.
따라서, 본 발명의 목적은 가입자의 수용용량을 증가시키고 가입자 데이터 전송용량을 크게 증가시킬 수 있는 무선가입자망(WLL) 기지국장치(RP)의 개발이다.Accordingly, an object of the present invention is the development of a wireless subscriber network (WLL) base station apparatus (RP) that can increase subscriber capacity and greatly increase subscriber data transmission capacity.
도1은, 본 발명에 따른 WLL 기지국장치(Radio Port)의 블럭도.1 is a block diagram of a WLL base station apparatus (Radio Port) according to the present invention.
도2는, 본 발명에 따른 기지국장치의 내부 쉘프간 직렬 프로세서간통신(IPC;Inter Processor Commununication)을 설명하기 위한 도면.Fig. 2 is a diagram for explaining interprocessor communication between internal shelves (IPC) of a base station apparatus according to the present invention;
도3은, 본 발명에 따른 기지국장치의 내부 쉘프간 IPC통신을 위한 버스데이터 포맷을 도시하는 도면.3 is a diagram showing a bus data format for IPC communication between internal shelves of a base station apparatus according to the present invention;
상기한 목적을 달성하기 위한 본 발명에 따른 WLL 기지국장치의 구조는 RCP(RP Control Processor Unit), RF 모듈, 아날로그 인터페이스 모듈, CCU(Channel Control Unit), LCU(Link Control Unit), RDU(Reference Clock Distribution Unit), ElRPC(El Interface for RPC)로 구성 된다.The structure of the WLL base station apparatus according to the present invention for achieving the above object is an RP Control Processor Unit (RCP), an RF module, an analog interface module, a Channel Control Unit (CCU), a Link Control Unit (LCU), a Reference Clock (RDU). Distribution Unit) and El Interface for RPC (ElRPC).
기자국장치 내부 모듈간의 통신은 ATM 셀을 이용한 IPC(Inter Processor Communication) 프로토콜로 이루어지게 된다. IPC통신은 ATM 셀을 이용하여 같은 쉘프 안에서는 셀버스를 이용하여 병렬로 메시지를 교환하고, 각 쉘프간은 직렬방식으로 메시지를 교환한다. 이를 위해서 송신측에서는 셀프 안에 병렬-직렬 블록이 구성되며, 수신측에서는 셀프안에 직렬-병렬 블록이 구성 된다.The communication between the internal module of the reporter station is made with an IPC protocol using an ATM cell. IPC communication uses ATM cells to exchange messages in parallel on the same shelf using Cellbus, and each shelf exchanges messages in a serial fashion. To this end, the parallel-serial block is configured in the shelf at the transmitter, and the serial-parallel block is configured in the shelf at the receiver.
이하, 첨부된 도면을 참조하여 본 발명에 따른 기지국장치의 예를 상세히 설명 한다.Hereinafter, an example of a base station apparatus according to the present invention will be described in detail with reference to the accompanying drawings.
도1은 WLL 기지국장치의 전체 구성을 나타내는 블록 다이어그램이다. WTL 기지국장치의 구조는 RCP(RP Control Processor Unit), RF 모듈, 아날로그 인터페이스 모듈, CCU(Channel Control Unit), LCU(Link Control Unit), RDU(Reference Clock Distribution Unit), ElRPC(El Interface for RPC)로 구성 된다. 여기서 RCP는 기지국 안의 모든 유니트의 하드웨어, 소프트웨어 기능을 관리하며, 호처리 제어 및 오류를 감시하는 제어 장치이다. RF 모듈은 안테나를 포함하여 고출력/저잡음 증폭 및 송수신 주파수 변환기능을 수행한다. 아날로그 인터페이스 모듈은 CCU 와 RF 모듈 간의 인터페이스 역할을 하며 QPSK 변복조 기능을 담당하는 유니트이다. CCU는 무선접속규격에 따라 통신을 하기 위하여 초기동기, 코드 트랙킹, 채널코딩, 인터리빙, 대역확산, 비터비 디코딩 등의 기능을 처리하는 다중채널카드로 한 유니트당 최대 6채널을 수용한다. LCU는 RCP와 각 유니트를 제어하는 하위 프로세서들이 서로 다른 쉘프에 위치할 경우 직렬 링크를 통한 IPC 통신을 지원하는 유니트이다. RDU는 기지국내의 각 모듈간 IPC용 기준 클럭, 기저대역 클럭, 망동기 클럭의 생성/분배 기능을 수행한다. ElRPC는 기지국 제어기와 기지국장치 간의 E1 라인을 정합하고 카드당 2E1 링크를 수용한다.1 is a block diagram showing the overall configuration of a WLL base station apparatus. The structure of the WTL base station device is RCP (RP Control Processor Unit), RF module, analog interface module, CCU (Channel Control Unit), LCU (Link Control Unit), RDU (Reference Clock Distribution Unit), El Interface (RPC) It consists of The RCP is a control device that manages the hardware and software functions of all units in the base station, controls call processing and monitors errors. The RF module includes an antenna to perform high power / low noise amplification and transmit / receive frequency conversion. The analog interface module serves as the interface between the CCU and the RF module and is responsible for the QPSK modulation and demodulation function. The CCU is a multi-channel card that handles functions such as initial synchronization, code tracking, channel coding, interleaving, spread spectrum, and Viterbi decoding for communication according to the wireless access standard. It can accommodate up to 6 channels per unit. The LCU is a unit that supports IPC communication over a serial link when the RCP and the subprocessors that control each unit are located on different shelves. The RDU performs the generation / distribution function of the reference clock, the baseband clock and the network synchronizer clock for each module in the base station. The ElRPC matches the E1 line between the base station controller and the base station apparatus and accepts 2E1 links per card.
도2는 쉘프간 IPC를 위한 병렬/직렬버스를 나타낸다. 다른 쉘프에 속한 보드에게 메시지를 보내기 위해서는 ALCU와 LCU의 셀 라우팅(Routing) 기능을 이용하여야 한다. 메시지를 보내고자 하는 보드는 먼저 단일주소 데이터셀을 보낸다. 이때 셀에는 상대의 VPI와 VCI정보가 포함된다. ALCU의 큐비트(Cubit)는 셀버스에서 받은 데이터 셀을 직렬 버스를 통해서 LCU로 전송한다. LCU는 직렬 라인을 통해 받은 메시지의 VPI를 전이한 후 메시지를 수신할 보드가 속해있는 웰프를 관장하고 있는 LCU에게 메시지를 넘겨준다. LCU의 Cubit은 셀버스에서 받은 데이터 셀을 무조건 직렬 버스를 통해 ALCU로 전달한다. ALCU는 직렬 라인(line)에서 받은 메시지의 VPI를 전이하여 해당 보드의 Cubit ID를 결정한 다음 셀버스를 통해 메시지를 전달한다. 동일 쉘프 내에서의 다른 보드로 메시지를 보내기 위해서는 단일주소 제어셀을 사용한다. 이 때 라우팅 헤더(Routing header)에 상대의 큐비트 아이디(Cubit ID)를 지정한다. ALCU를 제외한 나머지 보드들은 셀 라우팅 (cell routing) 기능이 필요없기 때문에 주소 전이메모리를 사용하지 않는다.2 shows a parallel / serial bus for intershelf IPC. To send a message to a board belonging to another shelf, use the cell routing functions of ALCU and LCU. The board that wants to send a message first sends a single address data cell. At this time, the cell includes the partner's VPI and VCI information. Cubit of the ALCU transfers data cells received from the cellbus to the LCU via the serial bus. The LCU transitions the VPI of the message received over the serial line and then passes the message to the LCU, which is in charge of the wells to which the board to receive the message belongs. Cubit in the LCU unconditionally delivers data cells received from the cellbus to the ALCU via the serial bus. The ALCU transitions the VPI of the message received on the serial line to determine the Cubit ID of the board and then delivers the message over Cellbus. Use a single address control cell to send a message to another board within the same shelf. At this time, a corresponding cubit ID is specified in a routing header. All boards except the ALCU do not require cell routing, so they do not use address transition memory.
도3은 각 쉘프간의 IPC를 위한 버스의 데이터 포멧을 그림으로 표현한 것이다. 이 버스는 E1 인터페이스와 같은 2 MHz 직렬 전송매체이며 물리적으로 125 ㎲ 마다 30 byte를 송수신하는 링크(Link)를 통하여 53 바이트 패킷(byte Packet) 단위로 메세지를 송수신한다.3 is a graphical representation of the data format of the bus for IPC between shelves. This bus is a 2 MHz serial transmission medium such as the E1 interface and transmits and receives messages in 53 byte packets through a link that physically transmits and receives 30 bytes every 125 ㎲.
국내 무선가입자망(WLL) 표준규격에 따라 기지국장치를 구성하므로써 가입자 수용용량을 증가시키고 가입자당 데이터 전송용량을 크게 증가시킬 수 있으며, 기지국장치 내에서 내부모듈간 통신은 ATM 셀을 이용한 IPC(Inter Processor Communication)프로토콜로 이루어지게 된다. 이때, 쉘프와 쉘프 사이에서는 직렬 접속을 사용하지만, 동일한 셀프 안에서는 병렬 접속을 사용하여 메시지 전송효율를 증가시킨다.By constructing the base station apparatus according to the domestic wireless subscriber network (WLL) standard, it is possible to increase subscriber capacity and increase data transmission capacity per subscriber. Processor Communication). In this case, the serial connection is used between the shelf and the shelf, but the parallel connection is used within the same shelf to increase the message transmission efficiency.
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KR100447700B1 (en) * | 2001-12-24 | 2004-09-08 | 한국전자통신연구원 | Base Station of Asynchronous IMT-2000 System |
KR100452638B1 (en) * | 2001-12-24 | 2004-10-15 | 한국전자통신연구원 | Wireless base station comprising diagnostic monitor |
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