JPH06152562A - Base station controller - Google Patents

Abstract

PURPOSE:To establish the communication by external digital signals in the base station controller to be connected to a radio station through a PCM highway. CONSTITUTION:When no transmission/reception clock signal 20 is supplied from a host device 2, a phase synchronizing oscillator 13 with clock monitoring circuit starts operation and outputs a transmission/reception clock signal 21 with the prescribed frequency. An inserter 11 and a dropper 12 are synchronized with the transmission/reception clock signal 21 to multiplex insertion data 22 with an outgoing PCM highway 16 and separate extraction data 23 from an incoming PCM highway 18. Thus, a base station controller 8 can establish the transmission and reception of an external digital signal 24 with a base station 3 independently of the state of the host device 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base station controller which establishes transmission / reception of a PCM highway signal with a base station at least when power supply is secured.

[0002]

2. Description of the Related Art Conventionally, in this type of device, an input / output port for an external signal is provided in a carrier device and the carrier device performs demultiplexing to establish transmission / reception of a PCM highway with a base station.

[0003]

In this conventional base station control device, in addition to the original carrier function of the carrier device, a dedicated device for demultiplexing external signals of a small number of channels on independent communication paths is provided. There is a problem in that it is necessary to add them, and the transport device tends to be large and complicated.

[0004]

A base station control device of the present invention is a base station control device for controlling a base station connected via a PCM highway, the PCM highway transmitting and receiving a PCM highway signal to and from the base station. Signal transmitting / receiving means, specific time slot inserting means for inserting an external digital signal into a specific time slot of the downlink PCM highway to the base station, and external digital signal extracting from a specific time slot of the uplink PCM highway from the base station. The highway clock supplied from the specific time slot extracting means and the host device is monitored, and when normal, a clock synchronized with the highway clock from the host device is supplied, and when abnormal, a clock of a predetermined frequency is supplied to the PCM with the base station. PC supplied as highway clock
M highway clock supply means.

Power supply means for supplying power to the specific time slot inserting means, the specific time slot extracting means, the PCM highway clock supplying means, and the PCM highway signal transmitting / receiving means independently of other devices. I have it.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a base station control device of the present invention.

The base station controller 1 of this embodiment comprises a base station connection device 8, a transceiver 6, a time switch 7 and a phase-locked oscillator 9.
Connect with highway 15 and up PCM highway 17,
The base station 3 is connected by a down PCM high 16 and an up PCM high way 18.

The base station connection device 8 is composed of an inserter 11, a dropper 12, a transceiver 10, a phase-locked oscillator 13 with a clock monitoring circuit, and a connection circuit 14. The PCM highway 16 and the upstream PCM highway 18 connect to the base station 3.

The inserter 11 inserts the external digital signal 24 into a specific time slot of the downstream PCM highway 16. The dropper 12 extracts the external digital signal 25 multiplexed in the specific time slot of the upstream PCM highway 18 at the base station 3. The transceiver 10 synchronizes with the transmission / reception clock signal 21 and the down PCM highway 16 and the up PC
It transmits and receives data on the M highway 18. The phase-locked oscillator 13 with a clock monitor circuit transmits and receives a clock signal 20
When normal, the transmission / reception clock signal 21 synchronized with the PCM highway clock from the host device 1 is output, and when abnormal, the transmission / reception clock signal 21 of a predetermined frequency is output.
The connection circuit 14 inserts the external digital signal 24 into the insertion data 22.
, And the extracted data 23 from the dropper 12 is connected to the external digital signal 24.

The transceiver 6 is a downlink PCM highway 1
5 transmits and receives data to and from the up PCM highway 17, and extracts the transmit / receive clock signal 19 from the down PCM highway 15.

The time switch 7 is the down PCM highway 1
The data on the time slot 5 is replaced with the time slot at an arbitrary position, and the downstream PCM highway 4 is output.
The data on the time slot of the upstream PCM highway 5 is replaced with the time slot at an arbitrary position and the upstream PCM highway 17 is output.

The phase-locked oscillator 9 transmits and receives the clock signal 1
A transmission / reception clock signal 20 synchronized with 9 is generated and supplied to the phase-locked oscillator 13 with a clock monitoring circuit.

The host device 2 is an exchange. The base station 3 is a wireless station and is mainly composed of a wireless device and its control device.

The base station control device 1 of the present embodiment includes a power supply unit for supplying power to the inserter 11, the dropper 12, the phase-locked oscillator 13 with a clock monitoring circuit, and the transceiver 10 independently of other devices. (Not shown).

Next, the operation of this embodiment will be described.
Normally, the base station control device 1 extracts the transmission / reception clock signal 19 from the downlink PCM highway 15 sent from the host device 2 and supplies it to the phase locked oscillator 9. As a result, the transmission / reception clock signal 21 obtained by supplying the transmission / reception clock signal 20 obtained from the phase-locked oscillator 9 to the phase-locked oscillator 13 with a clock monitoring circuit is supplied to the transceiver 10, the inserter 11, and the dropper 12 to operate. , Multiplexed insertion data 22 to the downstream PCM highway 16 and extracted data 23 from the upstream PCM highway 18.
Is being separated.

However, when the host device 2 or the base station control device 1 is abnormal and the transmission / reception clock signal 20 cannot be obtained, the phase-locked oscillator 13 with a clock monitoring circuit is free-running at a predetermined frequency and the transmission / reception clock signal 21 is transmitted. Occur.

The transceiver 10 and the inserter 11 are caused by the free running of the phase-locked oscillator 13 with the clock monitoring circuit.
And a transmission / reception clock signal 21 is output to the dropper 12.
From this time point, the transceiver 10, the inserter 11, and the dropper 12 start operating by the transmission / reception clock signal 21.

Then, the inserter 11 multiplexes the insertion data 22 on the downlink PCM highway 16 by the transmission / reception clock signal 21 generated and output by the free-running of the phase-locked oscillator 13 with a clock monitoring circuit, and the dropper 1
2 separates the extracted data 23 from the upstream PCM highway 18 by the transmission / reception clock signal 21 generated and output by the free-running of the phase-locked oscillator 13 with the clock monitoring circuit, and the transceiver 10 separates the phase-locked oscillator 13 with the clock monitoring circuit. It becomes possible to transmit / receive the down PCM highway 16 and the up PCM highway 18 in synchronization with the transmission / reception clock signal 21 created and output by the self-propelling.

[0019]

As described above, according to the present invention, in addition to the original carrier function of the carrier device, independent communication is realized without adding a dedicated device for demultiplexing external digital signals of a small number of channels. Since the path can be secured, the transport device can be downsized.

In addition, as communication by an independent communication path between the base station control device and the base station, construction of the base station, the down PCM highway and the up PCM highway is completed at the time of installation work of the base station control device, and the base station connection is established. If power is supplied to the device, there is an effect that communication using an external digital signal can be performed between the base station control device and the base station even if the work on the upper side is not completed from the base station control device.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a base station control device of the present invention.

[Explanation of symbols]

 1 Base Station Control Device 2 Upper Device 3 Base Station 4, 15, 16 Downlink PCM Highway 5, 17, 18 Uplink PCM Highway 6, 10 Transceiver 7 Time Switch 8 Base Station Connection Device 9 Phase Synchronous Oscillator 11 Inserter 12 Dropper 13 Clock Monitoring Phase-locked oscillator with circuit 14 Connection circuit 19, 20, 21 Transmit / receive clock signal 22 Inserted data 23 Extracted data 24, 25 External digital signal

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04Q 11/04 303 C 9076-5K

Claims (2)

[Claims] 1. A base station control device for controlling a base station connected via a PCM highway, and a PCM highway signal transmitting / receiving means for transmitting / receiving a PCM highway signal to / from the base station, and a downlink PCM highway to the base station. , A specific time slot inserting means for inserting an external digital signal into the specific time slot of the base station, a specific time slot extracting means for extracting the external digital signal from a specific time slot of the uplink PCM highway from the base station, and a higher-level device. The highway clock is monitored, and when normal, a clock synchronized with the highway clock from the host device is supplied, and when abnormal, a PCM highway clock supply means for supplying a clock of a predetermined frequency as the PCM highway clock with the base station. A base characterized by provision Station controller. 2. A power supply means for supplying power to the specific time slot inserting means, the specific time slot extracting means, the PCM highway clock supplying means, and the PCM highway signal transmitting / receiving means independently of other devices. The base station control device according to claim 1, further comprising: