Relay system in ring topology

Patent metadata

Field	Value
Publication number	US-2017111717-A1
Application number	US-201615391971-A
Country	US
Kind code	A1
Filing date	Dec 28, 2016
Priority date	Dec 4, 2013
Publication date	Apr 20, 2017
Grant date	—

Abstract

A master unit configured to manage a plurality of remote units connected in a ring topology, the master unit comprising: a network management section configured to transmit at least one of a path-state monitoring control signal and a delay measurement control signal to the plurality of remote units in a first direction and a second direction which is a reverse direction of the first direction, and receives an acknowledgement signal in response to the at least one of a path-state monitoring control signal and a delay measurement control signal; and switching control means for transmitting a forward signal received from a base station in the first direction, and transmitting a switching control signal in the second direction when a defect is detected in any remote unit among the plurality of remote units by the network management section.

First claim

What is claimed is:

1 . A unit of digital radio frequency transport system, comprising:
a first transport processing path configurable to receive a first signal from a first adjacent unit while operating in a first mode and receive a second signal from a second adjacent unit while operating in a second mode; a second transport processing path configurable to receive the second signal from the second adjacent unit while operating in the first mode and receive the first signal from the first adjacent unit while operating in the second mode; and a controller configured to switch between the first mode and the second mode for each of the first transport processing path and the second transport processing path based on a mode control signal.

2 . The unit of claim 1 , wherein the first transport processing path comprises:
a first de-framer configured to de-frame the first signal while operating in the first mode and de-frame the second signal while operating in the second mode; and a first framer configured to frame the de-framed first signal while operating in the first mode and frame a signal, which is generated by summing the de-framed second signal and a digital processed terminal signal, while operating in the second mode.

3 . The unit of claim 2 , wherein the first transport processing path further comprise:
a first transmitter configured to transmit the framed first signal to the second adjacent unit while operating in the first mode and transmit the framed signal to the first adjacent unit while operating in the second mode.

4 . The unit of claim 1 , wherein the first transport processing path comprises:
a first receiver receiving the first signal and performing a clock recovery based on the first signal while operating in the first mode, and receiving the second signal while operating in the second mode.

5 . The unit of claim 1 , wherein the second transport processing path comprises:
a second de-framer configured to de-frame the second signal while operating in the first mode and de-frame the first signal while operating in the second mode; and a second framer configured to frame a signal, which is generated by summing the de-framed second signal and a digital processed terminal signal, while operating in the first mode and frame the de-framed first signal while operating in the second mode.

6 . The unit of claim 5 , wherein the second transport processing path further comprise:
a second transmitter configured to transmit the framed signal to the first adjacent unit while operation in the first mode and transmit the framed second signal to the second adjacent unit while operating in the second mode.

7 . The unit of claim 1 , wherein the second transport processing path comprises:
a first receiver receiving the first signal and performing a clock recovery based on the first signal while operating in the first mode, and receiving the second signal while operating in the second mode.

8 . The unit of claim 1 , further comprising:
a first processor configured to receive a de-framed first signal from the first transport processing path while operating in the first mode, and receive another de-framed first signal from the second transport processing path while operating in the second mode, and perform digital processing on the de-framed first signals; and a second processor configured to perform on digital processing on a terminal signal to generate a digital processed terminal signal, and transmit the digital processed terminal signal to the second transport processing path while operating in the first mode, and transmit the digital processed terminal signal to the first transport processing path while operating in the second mode.

9 . The unit of claim 1 , wherein the controller receives the mode control signal from the first adjacent unit or the second adjacent unit through one of the first transport processing path and the second transport processing path.

10 . The unit of claim 1 , wherein the controller generates the mode control signal based on path monitoring information, wherein the path monitoring information is associated with the at least one of the first transport processing path and the second transport processing path.

11 . The unit of claim 1 , wherein the controller generates the mode control signal based on path monitoring information, wherein the path monitoring is transmitted from the first adjacent unit or the second adjacent unit.

12 . The unit of claim 1 , wherein the controller, after switching from the first mode to the second mode, switches from the second mode to the first mode at an interval of a time corresponding to a time of control by a network management server or a master unit.

13 . The unit of claim 1 , wherein the unit is a first remote unit, and the first adjacent unit is a master unit or a second remote unit, which are communicatively coupled to the first remote unit, and the second adjacent unit is a third remote unit communicatively coupled to the first remote unit.

14 . A unit of digital radio frequency transport system, comprising:
a first processor configurable to receive a de-framed first signal from a first transport processing path while operating in a first mode, and receive another de-framed first signal from a second transport processing path while operating in a second mode, and perform digital processing on a service signal in the de-framed first signals, wherein the service signal is transmitted to a user terminal; a second processor configurable to perform on digital processing on a terminal signal transmitted from the user terminal, and transmit the digital processed terminal signal to the second transport processing path while operating in the first mode, and transmit the digital processed terminal signal to the first transport processing path while operating in the second mode; and a controller configured to switch between the first mode and the second mode for each of the first processor and the second processor based on a mode control signal.

15 . The unit of claim 14 , wherein the first transport processing path comprises:
a first de-framer configured to de-frame a first signal transmitted from a first adjacent unit and transmit the de-framed first signal to the first processor while operating in the first mode, and de-frame a second signal transmitted from a second adjacent unit while operating in the second mode; and a first framer configured to frame the de-framed first signal while operating in the first mode, and frame a signal, which is generated by summing the de-framed second signal and the digital processed terminal signal transmitted from the second processor, while operating in the second mode.

16 . The unit of claim 14 , wherein the second transport processing path comprises:
a second de-framer configured to de-frame a second signal transmitted from a second adjacent unit while operating in the first mode, and de-frame a first signal transmitted from a first adjacent unit and transmit the another de-framed first signal to the first processor while operating in the second mode; and a second framer configured to frame a signal, which is generated by summing the de-framed second signal and the digital processed terminal signal transmitted from the second processor, while operating in the first mode, and frame the de-framed first signal while operating in the second mode.

Assignees

• Solid Inc

Inventors

• Kim Do Yoon
• Seo Kwang Nam
• Kim Hee Gon

Classifications

• H04B10/038

  using bypasses · CPC title

• H04B10/2755

  Ring-type networks with a headend · CPC title

• H04B10/275

  Ring-type networks · CPC title

• H04Q11/0005 Primary

  Switch and router aspects · CPC title

• H04B10/0771

  Fault location on the transmission path · CPC title