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Synchronous digital hierarchy signal transmission method

A technology for synchronizing digital series and transmission methods, which is applied in the field of communication, can solve problems such as consumption, and achieve the effect of improving bandwidth utilization

Active Publication Date: 2013-10-16
重庆光通奥普泰通信技术有限公司
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  • Claims
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Problems solved by technology

In the traditional synchronous digital series signal transmission, because the STM-1 frame overhead and the management unit pointer consume a total of 81 bytes, the actual payload area used to carry the E1 signal is only 2349 bytes, and the E1 signal is based on SDH After the standard virtual container is packaged and multiplexed, one STM-1 frame can only carry 63 E1 signals at most, and the bandwidth utilization rate is only (2.048×63) / 155.520≈82.96%

Method used

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  • Synchronous digital hierarchy signal transmission method

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Embodiment

[0025] The present invention provides a transmission method of synchronous digital serial signals. This method still uses a block frame composed of 9 rows and 270 columns of bytes to carry E1 signals, and multiple block frames are multiplexed into multiple frames through multiplexing technology. . However, different from the existing SDH standard, the block frame adopted by the present invention has a unique intra-frame structure, and the present invention uses the block frame structure to improve the actual utilization rate of the transmission bandwidth. Such as image 3 As shown, the block frame adopted by the present invention includes an administrative overhead field (ASOH), multiplexing additional fields (A3, A4 and A5) and a payload field (Payload). During transmission, every 75 block frames are multiplexed into a multiframe, because the block frame adopted in the present invention has the same 9 rows and 270 column byte structures as the STM-1 frame, so the transmissio...

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Abstract

The invention provides a synchronous digital hierarchy signal transmission method. In the method, a block frame consisting of 9 rows of bytes and 270 columns of bytes is adopted to bear E1 signals, wherein only 30 bytes in the block frame are occupied by fields used for channel management and multiplexing control, while the other 2,400 bytes are all used for bearing the E1 signals. The method has the advantages that: the block frame adopted in the method has a structure, similar to that of an STM-1 frame, consisting of 9 rows of bytes and the 270 columns of bytes; the transmission can be realized in transmission channels with an STM-1 rate by adopting a conventional SDH signal transmission mode; bandwidth utilization rate can maximally reach 98.77 percent; and the method is applied to microwave communication transmission.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for transmitting synchronous digital serial signals. Background technique [0002] In a digital communication system, the transmitted signals are digitized pulse trains. In the digital transmission system, there are two digital transmission series, one is called "Plesiochronous Digital Hierarchy, referred to as PDH"; the other is called "Synchronous Digital Hierarchy" (Synchronous Digital Hierarchy, referred to as SDH). [0003] In the system adopting quasi-synchronous digital series (PDH), a high-precision clock is set on each node of the digital communication network, and the signals of these clocks have a unified standard rate. Although the precision of each clock is high, there are always some small differences. In order to ensure the quality of communication, it is required that the difference between these clocks cannot exceed the specified range. Therefor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/16
Inventor 任永顺卢启洪肖帮洪
Owner 重庆光通奥普泰通信技术有限公司
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