Apparatus for controlling data transmission/reception between main system and remote system of BTS in mobile communication system

• US 20030179779A1
• Filed: 03/21/2003
• Published: 09/25/2003
• Est. Priority Date: 03/21/2002
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Kyou-Seung
• Granted Patent: US 7,359,346 B2
• Time in Patent Office: Days
• US Class Current: 370/503
• CPC Class Codes: H04J 2203/0035 Radio
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

An apparatus for controlling data transmission/reception between a main system and a remote system of a base transceiver station (BTS) in a mobile communication system to improve reliability of data without the limitation of signal transmission distance between a main system and a remote system. The apparatus has: a time stamp generator for generating a time stamp signal indicating start of a Synchronous Transfer Mode STM) frame using a reference synchronous signal; a data former for receiving and being synchronized with the reference synchronous signal, and converting received traffic data into STM frame data; and a data transmitter for receiving and mapping the output data of the time stamp generator with a data communication channel (DCC), receiving output data of the data former, mapping the output data of the data former with a frame transmission channel, converting data mapped with the channels into an optical signal for transmission on an optical path.

Claims

1. An apparatus for transmitting data in a Base Transceiver Station (BTS) containing a main module and a remote module, each having a digital hierarchy transmission/reception unit, the apparatus comprising:

a time stamp generator for generating a time stamp signal indicative of a start position of a Synchronous Transfer Mode (STM) frame using a reference synchronous signal for use in a mobile communication system;

a data former for receiving the reference synchronous signal, being synchronized with the reference synchronous signal, and converting received traffic data of the mobile communication system into STM frame data; and

a data transmitter for receiving the output data of the time stamp generator, mapping the output data of the time stamp generator with a data communication channel (DCC), receiving output data of the data former, mapping the output data of the data former with a frame transmission channel, converting data mapped with the channels into an optical signal, and transmitting the optical signal to an optical path.

2. The apparatus as claimed in claim 1, wherein the data former comprises:

a reference signal provider for receiving the reference synchronous signal, and generating a reference signal;

a traffic data interface for receiving serial traffic data of the mobile communication system and the reference signal, being synchronized with the reference synchronous signal, and converting the serial traffic data into parallel traffic data;

an overhead processor for generating overhead data used for maintenance of a STM signal; and

a frame processor for receiving the parallel traffic data of the mobile communication system, the reference synchronous signal, and the overhead data, being synchronized with the reference synchronous signal, and generating STM frame data using the overhead data and the traffic data.

3. The apparatus as claimed in claim 2, wherein the data former further comprises:

a scrambling processor for receiving the frame data from the frame processor, and scrambling all of the signals except a frame alignment signal.

4. An apparatus for receiving data in a Base Transceiver Station (BTS) containing a main module and a remote module, each having a digital hierarchy transmission/reception unit, the apparatus comprising:

a data receiver for receiving a Synchronous Transfer Mode (STM) optical signal, converting the STM optical signal into an electric signal, and generating a signal received over a Data Conmunication Channel (DCC) separately from a signal received over a frame transmission channel;

a time stamp restoration module for receiving the DCC signal and the frame transmission channel signal from the data receiver, detecting a time stamp signal adapted to execute frame restoration, and generating a restored time stamp signal; and

a data restoration module for receiving the frame transmission channel signal and the restored time stamp signal, and restoring the frame transmission channel signal according to the restored time stamp signal.

5. The apparatus as claims in claim 4, wherein the data restoration module comprises:

a frame processor for receiving a reference signal, received frame data, and a time stamp signal, dividing a frame into a plurality of frame units according to the time stamp signal, separating overhead from traffic data in the divided frames, and outputting the overhead and the traffic data according to the reference signal;

an overhead processor for receiving the overhead data, obtaining maintenance information, and outputting the maintenance information;

a traffic data interface for converting the traffic data into serial data according to the reference signal; and

a reference signal provider for receiving a reference synchronous signal to create the reference signal, and outputting the reference signal.

6. The apparatus as claimed in claim 5, wherein the data restoration module further comprises:

a scrambling processor for descrambling reception frame data having been scrambled, and outputting the descrambled frame data to the frame processor.

7. The apparatus as claimed in claim 4, wherein the time stamp restoration module comprises:

a frequency divider for executing frequency division on a STM clock signal, and generating frequency-divided signals;

a serial/parallel converter for receiving the serial frame data according to the STM clock signal, being synchronized with a signal received from the frequency divider, and converting the serial frame data into parallel frame data;

a delay for delaying the parallel frame data by a predetermined clock signal;

a register for sequentially storing parallel frame data delayed by the delay and non-delayed parallel frame data, and outputting them according to a First Input First Output (FIFO) scheme;

a pattern detector for detecting a pattern of a frame alignment signal (FAS) from among output frame data of the register, outputting the detected pattern, and sequentially outputting input data; and

an output signal detector for receiving the frame data and a pattern detection signal, and outputting the frame data according to the pattern detection signal.

8. A method for transmitting data in a Base Transceiver Station (BTS) containing a main module and a remote module, each having a digital hierarchy transmission/reception unit, the method comprising the steps of:

generating a time stamp signal indicative of a start position of a Synchronous Transfer Mode (STM) frame using a reference synchronous signal for use in a mobile communication system;

converting received traffic data of the mobile communication system into STM frame data that is synchronized with the reference synchronous signal; and

mapping the time stamp signal with a data communication channel (DCC);

mapping the STM frame data with a frame transmission channel; and

converting mapped data in the DCC and frame transmission channel into an optical signal for transmission on an optical path.

9. A method as claimed in claim 8, wherein the converting step for converting received traffic data further comprises the steps of:

generating a reference signal using reference synchronous signal;

receiving serial traffic data of the mobile communication system and the reference signal, being synchronized with the reference synchronous signal, and converting the serial traffic data into parallel traffic data;

generating overhead data used for maintenance of a STM signal; and

receiving the parallel traffic data of the mobile communication system, the reference synchronous signal, and the overhead data, being synchronized with the reference synchronous signal, and generating STM frame data using the overhead data and the traffic data.

10. A method as claimed in claim 9, further comprising the step of:

scrambling the frame data except a frame alignment signal.

11. A method for receiving data in a Base Transceiver Station (BTS) containing a main module and a remote module, each having a digital hierarchy transmission/reception unit, the method comprising the steps of:

receiving a Synchronous Transfer Mode (STM) optical signal;

converting the STM optical signal into an electric signal and generating a signal received over a Data Communication Channel (DCC) separately from a signal received over a frame transmission channel;

examining the DCC signal and the frame transmission channel signal to detect a time stamp signal adapted to execute frame restoration and generate a restored time stamp signal; and

restoring the frame transmission channel signal according to the restored time stamp signal.

12. A method as claimed in claim 11, wherein the restoring step further comprises the steps of:

generating a reference signal from a reference synchronous signal;

receiving the reference signal, received frame data and the time stamp signal and dividing a frame into a plurality of frame units according to the time stamp signal;

separating overhead from traffic data in the divided frames and outputting the overhead and the traffic data according to a reference signal;

obtaining maintenance information from the overhead; and

converting the traffic data into serial data according to the reference signal.

13. A method as claimed in claim 12, wherein the received frame data was scrambled, the restoring step further comprising the step of:

descrambling the received frame data.

14. A method as claimed in claim 11, wherein the examining further comprises the steps of:

executing frequency division on a STM clock signal to generate frequency-divided signals;

receiving the serial frame data according to the STM clock signal, the serial frame data being synchronized with one of the frequency-divided signals, and converting the serial frame data into parallel frame data;

delaying the parallel frame data by a predetermined clock signal;

sequentially storing parallel frame data that has been delayed and non-delayed parallel frame data and outputting them according to a First Input First Output (FIFO) scheme;

detecting a pattern of a frame alignment signal (FAS) from among output frame data resulting from the FIFO scheme, outputting the detected pattern, and sequentially outputting input data; and

outputting the frame data according to the pattern detection signal.