KR20030085394A - Apparatus for interfacing between BSC and BTS in a mobile communication inbuilding system - Google Patents

Abstract

PURPOSE: An apparatus for interfacing a control station and a base station in a mobile communication in-building system is provided to compact a system and improve the efficiency by realizing communication between the control station and the base station by using Ethernet or 25M serial communication. CONSTITUTION: A satellite receiving apparatus(110) receives signals transmitted from a satellite. An Ethernet hub apparatus(120) is provided for Ethernet communication with a base station(200). A 25M transmitting unit(140) is provided for high speed data communication with the base station(200). An Ethernet hub apparatus(210) executes connection with a control station(100) and an Internet network. An E1/T1 transmitting unit(220) communicates data with an E1/T1 transmitting unit(130) of the control station(100). A base station controller(230) receives time signals and system clocks through HDLC(High-level Data Link Controller) communication with the satellite receiving apparatus(110) for controlling whole operations of the base station(200). A digital unit interface unit(240) interfaces call process data through 25M serial communication with the 25M transmitting unit(140). A digital unit control agent(250) controls the digital unit. A channel card agent(260) has a base station channel card inside. A base band downward control agent(270) downwardly converts base band signals. A base band upward control agent(280) upwardly converts the base band signals. An RF control agent(290) executes RF signal processing.

Description

Apparatus for interfacing between BSC and BTS in a mobile communication inbuilding system}

The present invention relates to a control station and a base station apparatus in a mobile communication in-building system in which a control station and a base station are installed and operated in one building. The present invention is more compact and efficient than a conventional Macro system, and does not use a dedicated network. The present invention relates to a control station and a base station interface device in a mobile communication in-building system that allows communication between a control station and a base station using Ethernet or 25M serial communication installed in a building.

Looking at the configuration of a general mobile communication system, the place where the control station is installed and the base station is installed far apart so that the communication between the control station and the base station using a dedicated network such as E1 or T1.

Therefore, the cost of installing a dedicated network was high, and the speed was only available at a limited speed (E1: 2.048 Mbps, T1: 1.544 Mbps), and various additional equipment and functions were needed to increase efficiency.

However, the recent mobile communication system is a change of the in-building system in which the control station and the base station is installed and operated in one building.

1 is a block diagram showing the configuration of a control station and a base station interface device in a conventional mobile communication inbuilding system.

Here, reference numeral 10 denotes a control station, and reference numeral 20 denotes a base station.

The control station 10 includes a satellite receiver 11 for receiving a signal transmitted from a satellite and an E1 / T1 transmitter 12 for data communication with the base station 20.

In addition, the base station 20 includes a satellite receiver 21 for receiving a signal transmitted from the satellite, an E1 / T1 transmitter 22 for data communication with the control station 10, and the E1 / T1 transmitter. A base station controller (BCPA) 23 connected to the satellite receiver 21 and the satellite receiver 21 to control the base station, a digital unit interface unit (DUIA) 24, and a digital unit controller for controlling the digital unit ( DCCA) 25, a channel card unit (MCCA) 26 with a built-in base station channel card, a baseband downconversion unit (DDCA) 27 for downconverting the baseband signal, and a baseband signal for upconverting the baseband signal A baseband upconversion unit (DUCA) 28 and an RF processing unit (RFCA) 29 for RF signal processing.

In the conventional mobile communication in-building system configured as described above, the control station and the base station interface device are provided with satellite reception devices 11 and 21 at the control station 10 and the base station 20, respectively. In this case, the satellite receiver 21 distributes a time of day (TOD) to the channel card unit 26 through HDLC communication with the base station controller 23.

In addition, the control station 10 and the base station 20 interface with the E1 / T1 transmitters 12 and 22.

However, the conventional in-building system as described above has a disadvantage in that the GPS receiver is overlapped even when the base station and the control station are located in the same place.

In addition, since the E1 / T1 transmission unit required for actual remote data transmission is used as it is, there are disadvantages in that the speed is limited.

Accordingly, the present invention is proposed to solve the above problems of the prior art,

An object of the present invention is a mobile communication inbuilding system which is more compact and efficient than the conventional Macro system, and enables communication between a control station and a base station using Ethernet or 25M serial communication installed in a building without using a dedicated network. The present invention provides a control station and a base station interface device.

"Control station and base station interface device in the mobile communication inbuilding system" according to the present invention for achieving the above object,

In a mobile communication inbuilding system in which a base station and a control station are installed and operated in a building,

The control station,

A satellite receiver for receiving a signal transmitted from a satellite, an ethernet hub for Ethernet communication with the base station, a normal E1 / T1 transmitter, and a 25M transmitter for high speed data communication with the base station; Composed,

The base station,

An Ethernet hub device for accessing the control station and the Internet network, an E1 / T1 transmitter for data communication in accordance with an E1 / T1 transmitter and an E1 / T1 standard of the control station, the Ethernet hub device, and E1 And a base station controller connected to the T1 transmission unit and receiving a time signal and a system clock through the HDLC communication with the satellite receiver in the control station to control the overall operation of the base station, and performing 25M serial communication with the 25M transmitter in the control station. And a digital unit interface unit for interfacing call processing data at high speed.

1 is a block diagram showing the configuration of a control station and a base station interface device in a conventional mobile communication inbuilding system,

2 is a block diagram showing the configuration of a control station and a base station interface device in a mobile communication inbuilding system according to the present invention;

3 is a conceptual diagram of a communication path between a control station and a base station in the present invention,

4 is a flowchart illustrating a TOD receiving path in a satellite receiver according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100 ..... Control station

110 ..... Satellite receiver

120, 210 ..... Ethernet hub device

140 ..... 25M Transmission

230 ..... Base station control unit

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention according to the technical spirit as described above.

2 is a block diagram showing the configuration of a control station and a base station interface device in a mobile communication inbuilding system according to the present invention.

As shown here, the control station 100 and the base station 200 is largely implemented, wherein the control station 100, the satellite receiving apparatus 110 for receiving a signal transmitted from the satellite, and the base station ( An Ethernet hub device 120 for Ethernet communication with the 200, a general E1 / T1 transmitter 130, and 25M transmitter 140 for high-speed data communication with the base station 200.

In addition, the base station 200, the Ethernet hub device 210 for performing connection with the control station 100 and the Internet network, the E1 / T1 transmission unit 130 and E1 of the control station 100 E1 / T1 transmitter 220 for data communication with the / T1 standard, the Ethernet hub device 210 and the E1 / T1 transmitter 220 is connected, and the satellite receiver 110 in the control station 100 ) Receives the time signal and the system clock through HDLC communication and performs 25M serial communication with the base station controller 230 for controlling the overall operation of the base station and the 25M transmitter 140 in the control station 100 to perform call processing data. A digital unit interface unit 240 for interfacing at high speed, a digital unit controller (DCCA) 250 for controlling the digital unit, a channel card unit (MCCA) 260 with a built-in base station channel card, a baseband signal A baseband downconversion section (DDCA) 270 for downconverting the uplink signal; The baseband up-conversion unit (DUCA) 280, and the RF processing unit (RFCA) (290) for RF signal processing.

The operation of the control station and the base station interface device in the mobile communication building system according to the present invention configured as described above will be described in detail with reference to FIGS. 3 and 4 as follows.

First, the present invention is equipped with a satellite receiver 110 only in the control station 100, using the Ethernet hub device and 25M transmitter in addition to the E1 / T1 transmitter for data communication between the existing control station 100 and the base station 200 To provide various interfaces as needed.

Each board in the base station 200 is connected to the hub device by Ethernet, and is configured to be connected to the control station 100 or the external internet network through the hub so that various additional applications may be used as necessary.

In particular, the E1 / T1 transmitter 220 in the base station 200 transmits data (call processing data, control and operation maintenance data) of the base station to a remote station at a speed of E1 (2.048 Mbps) or T1 (1.544 Mbps). Perform a function for transmitting to (100).

In addition, the Ethernet hub device 210 connects an Ethernet port allocated for debugging to each base station board to perform an interface with an external hub, that is, an internet network or a control station.

In addition, the base station control unit 230 is responsible for the overall control of the base station boards, and is connected to the cell bus, which is a high-speed bus and the transmission unit, and receives the TOD by HDLC communication from the satellite receiver 110 in the control station 100 channel card unit It performs the function of forwarding to 260.

In addition, the digital unit interface unit 240 is connected to the transmission unit by a high-speed cell bus, has an extra port for 25Mbps serial communication, and is connected to the channel card unit 260 in 25M serial to transmit call processing data. Make sure

In addition, the digital unit controller 250 receives a reference clock from the satellite receiver 110 and distributes the same to the channel card unit 260, and also the baseband downconversion unit 270 and the baseband upconversion unit. 280, and provides a path to the RF processor 290.

Lastly, the RF processor 290 is a board for controlling an RF block, and the baseband downconverter 270 and the baseband upconverter 280 perform a function of converting a baseband signal downward or upward.

3 is a conceptual diagram of a communication path between a control station and a base station in the present invention.

The communication path with the control station 100 was diversified to be selectively used according to the speed and the environment, and designed to be configured by fully utilizing the existing resources. In addition, the reference clock (system clock, PP2S, 10MHz) transmitted from the satellite receiver among the signals required by the base station to be directly connected to the base station from the satellite receiver of the control station.

In brief, a communication path with a control station includes an Ethernet path, a trunk path (E1 / T1 path), and a 25M serial communication path.

The Ethernet path initializes each board's Ethernet and communicates directly with the control station through the hub.

Next, the trunk path initializes the trunk at the transmitter and communicates with each board using the existing communication path.

The 25M serial communication path then initializes the 25M path, mediates communication with the control station, and internal communication uses the existing communication path.

4 is a flowchart illustrating a TOD receiving path in a satellite receiver according to the present invention.

The TOD in the satellite receiver may be directly connected to the base station via HDLC or may be received through the E1 / T1 transmitter. The interface with the control station is directly connected via 25M serial communication for high speed data communication. In other words, the existing digital unit interface unit directly connects with the redundant 25M serial line of the control station by using the extra 25M serial line, thereby enabling the interface without E1 / T1.

In more detail, in step S101, the base station controller prepares for receiving the TOD, and in step S102, it is determined whether the reception of the TOD is HDLC or trunk.

As a result of the determination, in the case of HDLC, the process proceeds to step S103 to perform HDLC initialization and receives the TOD as an HDLC packet. In step S104, the HDLC packet is analyzed and processed into ATM.

Next, in the case of the determination result trunk, ATM initialization is performed in step S105, TOD information is received in an ATM packet, and packet analysis and processing are performed in step S106.

In step S107, the TOD information is distributed to the channel card unit.

According to the present invention described above, when the base station is applied to the in-building system, it is possible to connect the control station and the base station using Ethernet or its own 25M serial communication without using a dedicated network, E1 / T1 transmission that is essentially provided The elimination of wealth has the advantage of economical system configuration and the use of 25M serial communication for high speed data communication.

In addition, since one satellite receiver can be shared instead of two satellite receivers, there is an advantage in that the cost can be reduced.

Claims (1)

In a mobile communication inbuilding system in which a base station and a control station are installed and operated in a building, The control station, A satellite receiver for receiving a signal transmitted from a satellite, an ethernet hub for Ethernet communication with the base station, a normal E1 / T1 transmitter, and a 25M transmitter for high speed data communication with the base station; Composed, The base station, An Ethernet hub device for accessing the control station and the Internet network, an E1 / T1 transmitter for data communication in accordance with an E1 / T1 transmitter and an E1 / T1 standard of the control station, the Ethernet hub device, and E1 And a base station controller connected to the T1 transmission unit and receiving the time signal and the system clock through the HDLC communication with the satellite receiver in the control station to control the overall operation of the base station, and performing 25 Mbps serial communication with the 25 Mbps transmitter in the control station. A control station and a base station interface device in a mobile communication in-building system, comprising a digital unit interface unit for interfacing call processing data at high speed.