System and method for subcarrier modulation in ISM band as supervisory channel

A technology of sub-carrier and monitoring signal, applied in the field of telecommunications, can solve problems such as the degradation of monitoring signal performance, and achieve the effects of simple configuration, simplified implementation, and cost reduction

Inactive Publication Date: 2008-02-27
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Reducing the subcarrier frequency to the kHz or MHz range reduces component cost and implementation difficulty, but the performance of this supervisory signal is also reduced accordingly

Method used

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  • System and method for subcarrier modulation in ISM band as supervisory channel
  • System and method for subcarrier modulation in ISM band as supervisory channel
  • System and method for subcarrier modulation in ISM band as supervisory channel

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Embodiment Construction

[0032] The invention relates to the technical field of telecommunications, in particular to a system and method for modulating a subcarrier into a monitoring channel. In the enumerated embodiments, the present invention is applied to an optical network, but it should be noted that the practical application scope of the present invention is wider.

[0033] At low frequencies, the subcarrier can be modulated as a supervisory channel. Since the subcarrier frequency overlaps with the main data spectrum, the latter acts like a high-level noise source to the subcarrier signal. Due to the limitation of the high spectral density of the data signal, the low-frequency subcarrier modulation generally supports the monitoring signal of the kbps level transmission rate. For example, the supervisory channel has a transfer rate of 9.6 kbps. In modern optical networks, terminal nodes usually require communication at a higher speed than kbps.

[0034] FIG. 1 is a simplified schematic diagram...

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Abstract

Apparatus and method for transmitting a supervisory signal for optical network applications. The apparatus includes a subcarrier transmission system configured to receive a first supervisory signal and output a second supervisory signal, and an electrical-to-optical conversion system configured to receive the second supervisory signal and. a data signal and output an optical signal. The second supervisory signal is associated with a subcarrier frequency. The data signal is associated with a data bandwidth, and the data bandwidth includes a data frequency. At the data frequency, a power density of the data signal is substantially equal to zero. A ratio of the subcarrier frequency to the data frequency ranges from 0.8 to 1, and the subcarrier frequency ranges from 2.4 GHz to 2.483 GHz.

Description

technical field [0001] The invention relates to the technical field of telecommunications, in particular to a system and method for modulating a subcarrier into a monitoring channel. In the enumerated embodiments, the present invention is applied to an optical network, but it should be noted that the practical application scope of the present invention is wider. Background technique [0002] Telecommunications technology has evolved and advanced over the years. Now, mere network has been applied in traditional telecommunication services, such as voice services and other applications. Optical networks can transmit a variety of signals with different capacities, such as optical network terminal signals, low-speed to high-speed multiplexing signals, switching signals, and transmission signals defined in the network. [0003] To monitor these signals, optical networks often trace data flow through multiple nodes, switching sites and links. For example, optical networks provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/00
Inventor 白聿生
Owner HUAWEI TECH CO LTD
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