Full-speed wired remote-transmission module

Abstract

The invention discloses a full-speed wired remote-transmission module, which comprises two parts of an SOPC and an SHDSL processor, wherein the SOPC is in charge of finishing the interaction with the SHDSL process through a CPU soft-core NIOS II, processing forwarding management information, controlling the logic of the entire remote-transmission module from a starting state to a synchronous state, and providing three service data interfaces and a route of management information interface for a user; and the SHDSL is in charge of finishing the extended TC-PAM modulation based on G.991.2, G.994.1 and G.997.1 protocols of an ITU organization at a digital front end, and achieving twisted-pair transmission at a bidirectional symmetrical load rate of between 128 and 8,192 kbit / s per second. The full-speed wired remote-transmission module has the following advantages: the problems that the conventional remote-transmission module has the defect caused by adopting two techniques of the SHDSL and a VDSL and line interference and can hardly finish the interlocking of clocks at a master end and a slave end are solved; and in the aspect of transmission distance, the remote-transmission moduleimproves the transmission distance to a large extent compared with the conventional remote-transmission module when the transmission rate is same, thus the full-speed wired remote-transmission modulecan reach the transmission distance of between 1 and 10 kilometers through a light coated wire.

Description

technical field [0001] The technology relates to the SHDSL technical standard, in particular to a full-rate wired remote transmission module. Background technique [0002] In some specific applications, DSL technology not only solves business access, but also provides means for relay transmission, which requires the selection of DSL technology that can provide bidirectional symmetrical load rates. At a rate below 4Mbit / s, SHDSL technology is the best choice. When the user puts forward the demand for a rate of 4Mbit / s or more and 8Mbit / s or less, because the highest transmission load rate calibrated in the ITU G.991.2 protocol and its appendix is ​​5696kbit / s, most solutions use VDSL technology. VDSL adopts MCM-DMT of multi-carrier modulation technology or SCM-QAM of single carrier modulation technology, while SHDSL adopts trellis-coded pulse amplitude modulation technology (TC-PAM). In contrast, SHDSL technology can achieve a longer transmission distance, while VDSL techno...

AI Technical Summary

Problems solved by technology

The traditional remote transmission module adopts two technologies of SHDSL and VDSL to realize the twisted-pair transmission of 128kbit / s to 8192kbit / s bidirectional symmetrical load rate, but the use of these two technologies requires two sets of circuits, so that the integration of the system, Insufficient power consumption and cost

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