KR20030094972A - Dual-Transceiver apparatus in base station - Google Patents

Abstract

PURPOSE: A device for duplexing transceivers of a base station is provided to add a preliminary transceiver and a switching block for failed transceivers, and to operate the preliminary transceiver instead of the failed transceivers, thereby minimizing service cut off. CONSTITUTION: A channel controller(311) digitally combines base bands of transmission signals, and checks priorities of receiving signals. Transceivers(312a-312c) are assigned to one FA and one sector. A preliminary transceiver(312d) operates instead of one of the transceivers(312a-312c), which has a failure. A switching block(313) switches into the preliminary transceiver(312d) when the one of the transceivers(312a-312c) fails. An amplifier unit(314) includes amplifiers(314a-314c). A front end block(315) includes many front end units(315a-315c) for inputting and outputting wireless signals transceived by sector. A base station controller(318) controls the switching block(313), and changes a connection to the preliminary transceiver(312d).

Description

Dual-Transceiver apparatus in base station

The present invention relates to a base station for wireless communication of a mobile communication system, and in particular, by implementing a transceiver for transmitting a baseband signal and an RF signal up / down converter dually, even if a transceiver failure occurs, the sector service can be continued without interruption. The present invention relates to a transceiver duplication apparatus of a base station.

The mobile communication system consists of a base station controller (BSC), a base transceiver system (BTS), and a wireless terminal. The control station connects and controls several base stations and is in charge of connecting the control station to the fixed communication network. In addition, the base station enables wireless access to the wireless terminal and also monitors the substance of the wireless channel. Using a mobile communication device, a plurality of wireless channels are jointly used by subscribers to select a specific channel every time the other party calls.

1 is a block diagram illustrating a communication network structure of a mobile communication system.

Referring to FIG. 1, in a mobile communication network composed of several communication areas (cells), mobile stations 190a to 190d perform wireless communication with a base station in charge of a corresponding communication area.

In this case, the mobile stations 190a to 190d may be located next to the base station (190a), may be at the boundary of the communication storage of the base station (190b), and may be in a position overlapping another communication area (190b) ), The basement of the building, or the building or topography may be in the shaded area (190d).

In addition, when moving from a cell boundary area to another cell, handoff is performed to disconnect the base station currently communicating and start communication with the base station of the new communication area, so that the mobile station can move without disconnection of the call. do.

In particular, the base station is located between the wireless terminal and the base station control station to control the call of the wireless terminal, and to perform the operation and maintenance functions of the system. It provides necessary information and opens a call path by allocating a traffic channel to a call request of a wireless terminal.

The base station of the mobile communication system is generally installed indoors, and divided into an omni base station for only one sector, a two sector base station for two sectors, and a three sector base station for three sectors, depending on the type. For each sector, the same frequency (FA) is used. Therefore, it can be said that a 2FA / 3 sector base station which manages three sectors while using two FAs actually manages six sectors.

The base station in the mobile communication system as described above has the following configuration.

2 is a block diagram showing the configuration of a conventional base station.

2, an antenna unit 215 for transmitting and receiving a radio signal with a wireless terminal, a front end unit 214 for processing RF signals transmitted and received through an antenna, and an amplifier for amplifying a transmission signal. 213, the transceiver unit 212 responsible for the up / down conversion of the baseband signal and the RF signal, and the transceiver unit 212 to control the baseband digital combining of the transmission signal and check the priority of the received signal. A channel control unit 211 for performing a CDMA channel, a channel element bank unit 215 for processing a CDMA channel in the base station, a base station control unit 217 for controlling the base station, and a base station connecting the base station and the base station control station 230. It is configured to include a network unit 218.

The main functions of each part constituting the base station will be described in more detail. First, the channel control unit 211 performs baseband digital combining of the transmission signal transmitted from the base station, checks the priority of the received signal, and RF. It controls the transceiver 212 which is a device.

In addition, the transceiver unit 212 assumes that the base station is a base station responsible for three sectors, and thus, transceiver 1 212a for sector 1, transceiver 2 212b for sector 2, and sector 3 It is composed of the transceiver 3 (212c) in charge, and serves to transmit the baseband signal and the RF signal up / down to the relevant block, and to measure and correct the RF power.

Amplifiers 1, 2, and 3, each of which amplifies the up / down converted signals transmitted from the transceiver unit 212, are connected to the transceivers 1, 2, and 3, 212a, 212b, and 212c, respectively. 213a, 213b, and 213c. The amplifier 213 receives the up-converted transmission signal from the transceiver unit 212 and performs a large power amplification to transmit the signal to the front end unit 214.

The front end part 214 corresponds to an end part through which a signal to be transmitted passes last, and corresponds to a front part through which a received signal passes first, and is a block for processing an RF transmission / reception function.

The front end unit 214 is responsible for high power amplification of the transmission signal, low noise amplification of the reception signal, transmission / reception frequency conversion function, and the like.

On the other hand, the channel element bank unit 216 is a block for processing the CDMA channel in the base station. The channel element bank unit 216 is a block for performing digital signal processing for call processing of each channel and matching with the RF block. It is made to work.

The base station control unit 217 performs an initialization function, a call processing function, an allocation and release of wired and wireless resources, and a management function of a wired and wireless link, and the base station network unit 218 is connected to the base station control station 230. It is responsible for the network function to switch all traffic and control signals generated in the network and usually connects to the base station control station 230 using E1 / T1 as a transmission path.

In addition, the front end unit 214 is connected to transmit a signal received for each sector to the transceiver unit 212, and the transceiver 1 (212a) and the front end unit 1 (214a) are connected to two reception paths, respectively. The transceiver 2 212b and the front end part 2 214b are connected to each other, and the transceiver 3 212c and the front end part 3 214c are connected to each other.

This is a method of selecting and transmitting a signal having high quality from two signals received through two antennas, and the received signal transmitted from the front end unit 214 to the transceiver unit 212 is transmitted to two RX paths. will be.

The transmission and reception paths for the transmission and reception of the radio terminal in the base station as described above are as follows.

First, when a traffic signal to be transmitted to the wireless terminal is transmitted from the base station control station 230 to the base station network unit 218 and switched, the base station network unit 218 controls the call processing of the base station control unit 217. The channel element bank unit 216 receives the switched signal.

The channel element bank unit 216 transmits the traffic signal to the channel control unit 211 by performing CDMA digital baseband processing, and the channel control unit 211 directly transmits the transmission signal to the transceiver unit 212.

The transceiver unit 212 is assigned one FA, one per sector, and transmits the RF signal to be transmitted to the amplifier 213, and amplifies the amplifier 213 to a large power to the front end unit 214. To send.

The transceiver 212, the amplifier 213, and the front end unit 214 are matched one to one, respectively, and a transmission signal is transmitted to the front end unit of a desired sector, and the RF signal amplified by the front end unit 214 is filtered. Finally, it transmits by antenna and wirelessly. In this case, since the front end unit 214 is configured one per sector, in the case of a base station responsible for two or more FAs, an amplifier 213 connected to the transceiver 212 of the same sector having several FAs is connected.

The receive path is similar to the inverse transform of the transmit path. That is, when the signal transmitted from the wireless terminal is received through the antenna of the base station, the front-end unit 214 performs low noise amplification of the received signal and is directly transmitted to the transceiver unit 212, the RF signal is downloaded to the baseband signal. It converts and transfers it to the channel control unit 211.

The channel control unit 211 transmits the digital baseband signal received from the transceiver unit 212 to the channel element bank 216 by checking the priority of the received signal, and the channel element bank 216 decodes the received signal. The original traffic signal is extracted and the base station network unit 218 is transmitted to the base station control station 230 under the control of the base station control unit 217.

At this time, the transceiver is assigned to one FA, one sector, one of the characteristics of the RF device, the failure is likely to occur, if the failure occurs the problem of the service of the corresponding FA, sector occurs.

In order to solve the problem as described above, the present invention provides a switching block for additional configuration if the transceiver of the base station to the failure, and to switch to a spare transceiver in accordance with the transceiver failure, the spare block It is an object of the present invention to provide a transceiver duplication apparatus of a base station that minimizes service interruption by using a spare transceiver even when it is difficult to immediately repair a failure by configuring the transceiver duplication.

1 is a block diagram showing a communication network structure of a mobile communication system.

2 is a block diagram showing the configuration of a conventional base station.

3 is a block diagram showing the configuration of a transceiver duplication apparatus of a 1FA / 3 sector base station according to an embodiment of the present invention.

Figure 4 is a block diagram showing the configuration of a transceiver duplication apparatus of a 2FA / 3 sector base station according to an embodiment of the present invention.

Transceiver redundancy apparatus of a base station according to the present invention,

In the base station of the mobile communication system,

A channel controller for performing baseband digital combining of the transmission signal and checking the priority of the reception signal;

N transceivers controlled by the channel controller and allocated to one FA and one sector;

A spare transceiver for operating in response to a failure of any of the N transceivers;

A switching block which performs a switching operation to a spare transceiver according to a failure of any transceiver among the N transceivers;

A front end block including an amplifier including N amplifiers and N amplifiers respectively corresponding to the N transceivers, and a plurality of front end units for inputting and outputting radio signals transmitted and received for each sector;

It characterized in that it comprises a base station control unit for changing the connection to a spare transceiver by controlling the switch block according to the failure of any transceiver of the N transceivers.

Preferably, the switching block,

N two transmit switches having two input terminals, one output terminal for selectively outputting the input terminal, and two receiving switches having N input terminals and one output terminal for selectively outputting the input terminal. It features.

Preferably, the transmission switch connects each of the first input terminals corresponding to the N transceivers, connects the second input terminal in common with the spare transceiver, and connects the output terminal to each corresponding amplifier to control signals of the base station controller. It is characterized in that to selectively connect with the output terminal according to.

Preferably, the two receiving switches transmit the first and second receiving signals transmitted through two input lines to the N input terminals of the two N input switches in consideration of the difference between the received signals at the N front end units. Each connection, and the output terminal is connected to the output terminal by a transceiver selectively according to the control signal of the base station base station control unit.

Referring to the accompanying drawings with respect to the transceiver duplex of the base station, characterized in that as described above in detail as follows.

3 is a block diagram showing the configuration of a transceiver duplication apparatus of a 1FA / 3 sector base station according to an embodiment of the present invention.

Referring to FIG. 3, in the case of a base station having three FAs and serving three sectors, an antenna unit 316 for transmitting and receiving radio signals to and from a wireless terminal, and a front for processing RF signals transmitted and received through the antennas are described. An end portion 315, an amplification portion 314 for amplifying a transmission signal, a transceiver portion 312 for up / down converting a baseband signal and an RF signal, and a sector of the transceiver portion 312. Switching block 313 for switching the transceivers 1, 2, 3 (312a, 312b, 312c) and spare transceiver 4 (312d) according to the failure of the transceiver, the switch control of the switching block 313, and the base station. A base station controller 318 for controlling, a channel controller 311 for controlling the transceiver unit, performing baseband digital combining of transmission signals and priority checking of received signals, and a channel element bank for processing a CDMA channel in the base station; It is configured, including 317 and a base station and a base station control station a base station network portion 319 connecting the unit 330.

In particular, the transceiver unit 312 includes a transceiver 1 (312a), a transceiver 2 (312b), a transceiver 3 (312c), and the transceivers 1, 2, 3 (312a, 312b) that are responsible for signals of three sectors, respectively. And a spare transceiver 4312d for use in the event of a failure of 312c).

The transceiver unit 312 can use the spare transceiver 4 (312d) when a failure occurs by the switching block 313, the switching block 313 is composed of three transmit switches and two receive switches.

Transmit switches SW 1 313a, SW 2 313b, and SW 3 313c each have two input stages a1, a2, a3, b1, b2, b3, and one output stage c1, c2, c3. The first output terminal (a1, a2, a3) is connected to the transceivers 1, 2, 3 (312a, 312b, 312c), respectively, and the second output terminal (b1, b2, b3) in common transceiver 4 (312d) ) And switch to transceiver 4 (312d) when any one of the transceivers 1, 2, and 3 (312a, 312b, 312c) occurs.

In addition, since the front end unit 315 has a variety for selecting the best signal from the signals received through the two antennas for reception, the two received signals must be transmitted to the transceiver unit 312.

At this time, when switching to the spare transceiver 4 (312d) due to the transceiver failure, since the two received path signal must also be transmitted to the transceiver 312d, two switches having three inputs, one output By using (RX SW1, RX SW 2) to transmit the received signal to the spare transceiver 4 (312d).

That is, the front end parts 1, 2, and 3 (315a, 315b, and 315c) are connected to the input terminals b4, b5, c4, c5, d4, and d5 of the two receiving switches, respectively. Two input signals of 1 (315a) are respectively connected, and two input signals of front end part 2 (315b) are connected to c4 and c5, and two input signals of front end part 3 (315c) are connected to d4 and d5. .

The output terminals a4 and a5 are connected to the transceiver 4312d to perform switching of the received signal.

Both the transmit switch and the receive switch operate according to an input signal of the base station controller 318, and the base station controller 318 detects a failure of the transceivers 1, 2, 3 (312a, 312b, 312c), and reserves a spare transceiver 4 ( 312d), so that redundancy is implemented by stopping the service even if one transceiver fails.

In another embodiment, the transceiver duplication apparatus for a base station in charge of two FAs and three sectors is as follows.

4 is a block diagram showing the configuration of a transceiver duplication apparatus of a 2FA / 3 sector base station according to an embodiment of the present invention.

Referring to FIG. 4, as shown in FIG. 3, a channel control unit 411, a channel element bank 417, a base station control unit 418, and a base station network unit 419 are configured to use two FAs. Even if the three sectors are the same, the front end block 415 responsible for the input / output of the radio signal per sector is the same as the front end part 1 415a and the front end part 2 415b. And a front end 3 (415c).

However, since the transceivers are allocated to FAs and sectors, respectively, transceivers 1, 2, and 3 (412a, 412b, and 412c), which handle three sectors of 1FA, and transceivers 4, 5, and 3, which handle three sectors of 2FA, respectively. Transceiver unit 412 is configured to include 6 (412d, 412e, 412f) and preliminary transceiver 7 (412g), and amplification unit 414 including amplifiers 1 to 6 (413a to 414f) corresponding thereto, and switching. Block 413 is configured.

The switching block includes transmission switches SW1 to SW6 413a to 413f corresponding to transceivers 1 to 6 412a to 412f, and reception switches RX SW1 413g and RX SW2 413h.

Input signals of the switch, the transceiver, and the front end of the switching block are input in the same manner as the three-sector base station of FIG. 3.

That is, transceivers 1 to 6 (412a to 412f) are connected to the first input terminals a1 to a6 of SW1 to SW6 (413a to 413f), respectively, and a spare transceiver 7 (412g) is common to the second input terminals b1 to b6. ) Is connected. Each output terminal c1 to c6 is connected to the amplifiers 1 to 6 (414a to 414f), respectively.

In addition, the input signal input from the front end unit 214 is connected to the RX SW 1, 2 (413g, 413h), respectively, two received signals received through the front end unit 1 (415a) RX SW 1, 2 413g and 413h are connected to the input terminals b7 and b8, and two received signals received through the front end unit 2 415b are connected to the input terminals c7 and c8 of the RX SW 1 and 2 (413g and 413h). Two reception signals received through the end part 3 415c are connected to the input terminals d7 and d8 of the RX SW 1 and 2 (413g and 413h), and the output terminals a7 and a8 are connected to the spare transceiver 7 412g.

For example, the transmission / reception path of the switching in the base station configured as described above will be briefly described.

Taking the three-sector base station of FIG. 3 as an example, when the transceiver 1 312a in FIG. 3 fails, the base station controller 318 sends a control signal to SW1 of the switching block 313 and is connected to a1-c1. The switch moves to b1-c1 so that transceiver 4 312d is responsible for sector 1. In addition, the connection of RX SW1, 2 (313d, 313e) is also changed to a4-b4, a5-b5 so that the transceiver 4 (312d) and the front end unit 1 (315a) is connected to open the reception path.

As described above, a spare transceiver is additionally configured at a base station configured with N transceivers to configure N + 1 transceivers and additionally configure a switching block including N + 2 switches, so that even if one transceiver fails In addition, it is possible to provide a wireless communication service by switching to a spare, thereby preventing service interruption and providing a better service.

As described above, the transceiver duplication apparatus of the base station according to the present invention implements a transceiver that frequently causes a failure due to the characteristics of the RF device of the base station, and additionally implements a switching block for controlling this, in case of one transceiver failure By connecting to a spare transceiver without interruption of service, it is possible to prevent service interruption and to provide service until recovery of the fault, and even when the transceiver is added due to an increase in sector, By simply increasing the switch, it is easy to connect to other devices, thereby enabling redundancy and sector addition at low cost.

Claims (4)

In the base station of the mobile communication system, A channel controller for performing baseband digital combining of the transmission signal and checking the priority of the reception signal; N transceivers controlled by the channel controller and allocated to one FA and one sector; A spare transceiver for operating in response to a failure of any of the N transceivers; A switching block which performs a switching operation to a spare transceiver according to a failure of any transceiver among the N transceivers; A front end block including an amplifier including N amplifiers and N amplifiers respectively corresponding to the N transceivers, and a plurality of front end units for inputting and outputting radio signals transmitted and received for each sector; And a base station control unit configured to change the connection to a spare transceiver by controlling the switch block according to a failure of any transceiver among the N transceivers. The method of claim 1, wherein the switching block, N two transmit switches having two input terminals, one output terminal for selectively outputting the input terminal, and two receiving switches having N input terminals and one output terminal for selectively outputting the input terminal. Transceiver redundancy apparatus of a base station characterized in that. The method of claim 2, wherein the transmission switch, Each first input terminal is connected with N transceivers, the second input terminal is commonly connected with a spare transceiver, and the output terminal is connected with each corresponding amplifier, and selectively connected with the output terminal according to the control signal of the base station controller. Transceiver redundancy device of the base station, characterized in that. The method of claim 2, wherein the two receiving switches, In consideration of the difference between the received signals in the N front-end units, the first and second received signals transmitted through the two input lines are respectively connected to the N input terminals of the two N input switches, and the output terminals are connected to the transceivers. The transceiver duplex apparatus of the base station to selectively connect to the output terminal according to the control signal of the base station base station control unit.