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A method, system and vector control entity for realizing uplink symbol boundary synchronization

A control entity, vectorized technology, applied in the field of communication, can solve the problem of inability to guarantee the synchronization of user uplink symbol boundaries, and achieve the effect of reducing the amount of calculation and storage requirements

Active Publication Date: 2016-05-25
HUAWEI TECH CO LTD
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  • Description
  • Claims
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Problems solved by technology

[0007] The purpose of the embodiments of the present invention is to provide a method for realizing the synchronization of uplink symbol boundaries, so as to solve the problem that the prior art cannot guarantee the synchronization of uplink symbol boundaries of users with different line lengths

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  • A method, system and vector control entity for realizing uplink symbol boundary synchronization
  • A method, system and vector control entity for realizing uplink symbol boundary synchronization
  • A method, system and vector control entity for realizing uplink symbol boundary synchronization

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Embodiment Construction

[0043] In the following description, for purposes of illustration rather than limitation, specific details such as specific system architectures, interfaces, and techniques are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0044] The technology described in this article can be used in various communication systems, such as XDSL communication systems, current 2G, 3G communication systems and next-generation communication systems, such as Asymmetric Digital Subscriber Line (Asymmetric Digital Subscriber Line, ADSL), Very High Speed ​​Digital Subscriber Line (Very -high-bit-rate Digital Subscriberloop, VD...

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Abstract

The invention is applicable to the technical field of communication, and provides a method and a system for realizing synchronization of an uplink symbolic boundary and a vectorization control entity (VCE). The method is applied to a central office (CO) end; the CO end comprises the VCE and a plurality of operator side VTU-Os of loops connected with the VCE. The method comprises the following steps of: acquiring first lead by the VCE according to line length of the VTU-Os, wherein the line length is the line length from the VTU-Os to the corresponding customer premises equipment (CPE); and the first lead is used as a downlink signal of the CO end by the VCE to be transmitted to the VTU-Os relative to the lead of the symbolic boundary of the uplink signal, so that the uplink symbolic boundary is adjusted according to the first lead when the first lead is received by the VTU-Os. According to the method and the system, the synchronization of the uplink symbolic boundary of different lines can be effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method, a system and a vector control entity for realizing uplink symbol boundary synchronization. Background technique [0002] At present, the industry has proposed Vectored-DSL (Vectorized Digital Subscriber Line) technology, which mainly uses the possibility of joint transmission and reception at the Digital Subscriber Line (Digital Subscriber Line, DSL) access multiplexer (DSLAM) end, and uses signal processing methods to offset Crosstalk interference. [0003] In order to eliminate crosstalk interference, it is necessary to introduce a crosstalk canceller W in the uplink direction and a precoder P in the downlink direction. Taking P as an example, assuming that the number of ports with crosstalk relationship is M=256, then the number of matrix elements of W is M*M=256*256. [0004] In an OFDM system (such as xDSL), each tone has a corresponding W matri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 李浩宋少华张涛麟
Owner HUAWEI TECH CO LTD
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