Method and apparatus for processing uplink signal in cable broadcasting network

Patent metadata

Field	Value
Publication number	US-10892797-B2
Application number	US-202016737760-A
Country	US
Kind code	B2
Filing date	Jan 8, 2020
Priority date	Jan 8, 2019
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

An apparatus and a method for processing an uplink signal of cable broadcasting network including: modulating uplink data to be transmitted to a broadcasting station which is located at an end of the cable broadcasting network into a plurality of symbols; performing a correlation-coding on the plurality of symbols; and outputting an analog radio frequency (RF) signal corresponding to the plurality of correlation-coded symbols are provided.

First claim

What is claimed is:

1. An apparatus for processing an uplink signal of cable broadcasting network, the apparatus comprising:
a processor, a memory, and a communication unit, wherein
the processor executes a program stored in the memory to perform:
modulating uplink data to be transmitted to a broadcasting station which is located at an end of a cable broadcasting network into a plurality of symbols;
performing a correlation-coding on the plurality of symbols; and
outputting an analog radio frequency (RF) signal corresponding to the plurality of correlation-coded symbols and transferring the analog RF signal to a subscriber media IP access terminal in the cable broadcasting network through the communication unit.

2. The apparatus of claim 1 , wherein
when performing a correlation-coding on the plurality of symbols, the processor performs
performing a correlation operation between the plurality of symbols and a previous symbol or a following symbol having a forward relationship or a backward relationship with the plurality of symbols.

3. The apparatus of claim 2 , wherein:
the correlation operation includes calculating a sum of a sequence represented by a product between the plurality of symbols and coefficients of the previous symbol or the following symbol.

4. The apparatus of claim 1 , wherein:
when modulating uplink data to be transmitted to a broadcasting station which is located at an end of a cable broadcasting network into a plurality of symbols, the processor performs:
correcting an error of a bit stream for the uplink data; and
modulating error-corrected bit stream into an M-ary Quadrature Amplitude Modulation (QAM) symbol.

5. The apparatus of claim 1 , wherein:
when outputting an analog radio frequency (RF) signal corresponding to the plurality of correlation-coded symbols, the processor performs:
generating a pulse based on the plurality of correlation-coded symbols; and
outputting the analog RF signal by up-converting a frequency of the pulse.

6. A method for processing an uplink signal of cable broadcasting network, the method comprising:
modulating uplink data to be transmitted to a broadcasting station which is located at an end of the cable broadcasting network into a plurality of symbols;
performing a correlation-coding on the plurality of symbols; and
outputting an analog radio frequency (RF) signal corresponding to the plurality of correlation-coded symbols.

7. The method of claim 6 , wherein:
the performing a correlation-coding on the plurality of symbols includes
performing a correlation operation between the plurality of symbols and a previous symbol or a following symbol having a forward relationship or backward relationship with the plurality of symbols.

8. The method of claim 7 , wherein:
the correlation operation includes calculating a sum of a sequence represented by a product between the plurality of symbols and coefficients of the previous symbol or the following symbol.

9. The method of claim 6 , wherein:
the modulating uplink data to be transmitted to a broadcasting station which is located at an end of a cable broadcasting network into a plurality of symbols includes:
correcting an error of a bit stream for the uplink data; and
modulating error-corrected bit stream into an M-ary Quadrature Amplitude Modulation (QAM) symbol.

10. The method of claim 6 , wherein:
the outputting an analog radio frequency (RF) signal corresponding to the plurality of correlation-coded symbols includes:
generating a pulse based on the plurality of correlation-coded symbols; and
outputting the analog RF signal by up-converting a frequency of the pulse.

11. A system for processing an uplink signal of cable broadcasting network, the system comprising:
a cable modem (CM) device configured to generate a plurality of symbols by modulating uplink data to be transferred to a broadcasting station which is located at an end of the cable broadcasting network, create a correlation between the plurality of symbols by performing a correlation-coding on the plurality of symbols, and output an analog radio frequency (RF) signal based on the plurality of correlation-coded symbols; and
a subscriber media IP access terminal configured to digitalize the analog RF signal and transfer an internet protocol (IP) signal including a digitalized RF signal to the broadcasting station.

12. The system of claim 11 , wherein:
the CM device is further configured to perform a correlation operation between the plurality of symbols and a previous symbol or a following symbol having a forward relationship or a backward relationship with the plurality of symbols.

13. The system of claim 12 , wherein:
the correlation operation includes calculating a sum of a sequence represented by a product between the plurality of symbols and coefficients of the previous symbol or the following symbol.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Baek Myung-Sun
• Song Jin Hyuk
• Jung Joon Young
• Kim Heung Mook
• Hyun Eun Hee

Classifications

• H04N21/6168 Primary

  involving cable transmission, e.g. using a cable modem · CPC title

• H04N21/4381

  Recovering the multiplex stream from a specific network, e.g. recovering MPEG packets from ATM cells (transmission of MPEG streams over ATM H04L12/5601) · CPC title

• H04N21/437

  Interfacing the upstream path of the transmission network, e.g. for transmitting client requests to a VOD server {(flow control in data networks H04L47/10; streaming protocols, e.g. RTP or RTCP, H04L65/65; scheduling or organising the servicing of application requests in data packet switching networks H04L67/60)} · CPC title

• H04N21/2393

  involving handling client requests (scheduling or organising the servicing of application requests H04L67/60) · CPC title

• H04N21/2383

  Channel coding {or modulation} of digital bit-stream, e.g. QPSK modulation (arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002) · CPC title