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Method and apparatus for transmitting data in front backhaul network

A backhaul network and data transmission technology, applied in the field of communications, can solve problems such as high cost, bandwidth consumption, and inability to meet antenna/MIMO, and achieve the effects of improving utilization, reducing transmission delay, and reducing cost and overhead.

Active Publication Date: 2016-03-30
ALCATEL LUCENT SHANGHAI BELL CO LTD
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Problems solved by technology

[0010] Therefore, we find that the mainstream digital CPRI protocol transmission (even with time / frequency domain compression) based on the MFH method is very bandwidth-intensive, in other words, it is extremely expensive to support a large number of antennas or MIMO applications in the near future; The traditional RoF method cannot meet the needs of a large number of antennas / MIMO in 4GLTE or B4G / 5G wireless networks
Until now, no suitable and economical scheme has been established to efficiently support MFH services with high antenna density (for massive MIMO applications)

Method used

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  • Method and apparatus for transmitting data in front backhaul network
  • Method and apparatus for transmitting data in front backhaul network
  • Method and apparatus for transmitting data in front backhaul network

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Embodiment Construction

[0037] In the following detailed description of the preferred embodiment, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings show, by way of example, specific embodiments in which the invention can be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments in accordance with the invention. It should be noted that although the steps of the relevant methods in the present invention are described in a specific order herein, this does not require or imply that these operations must be performed in this specific order, or that all shown operations must be performed to achieve the desired As a result, instead, the steps described herein may be performed in a different order. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution.

[0038] In order to solve the techni...

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Abstract

The invention relates to a method and apparatus for performing unlink and downlink data transmission on an optical line terminal (OLT) and a remote radio unit (RRU) in a front backhaul network. The method for transmitting downlink data on the OLT comprises steps of: A, receiving multiple sets of baseband vector signals transmitted from a baseband unit pool; B, modulating the sets of baseband vector signals to intermediate frequency subcarrier sets, and acquiring intermediate frequency signal sets corresponding to the RRU by means of subcarrier multiplexing; C, modulating the intermediate frequency signal sets onto carriers with various wave lengths on an optical wave by means of wavelength division multiplexing in order to acquire an optical wave carrying signals with various wave lengths; and D, guiding the optical wave to a transmission link. The method solves a bandwidth bottleneck in a MFH transmission process based on a CPRI protocol in the prior art, and contributes to multi-antenna MFH transmission in a conventional 4G LTE network or a B4G / 5G network in the future.

Description

technical field [0001] The present invention mainly relates to the technical field of communication, and in particular relates to a method and equipment for performing uplink and downlink data transmission on an optical line terminal and a remote radio unit of a front-end backhaul network. Background technique [0002] With increasing bandwidth demands in 4G LTE or upcoming 5G mobile networks, operators are looking for better ways to facilitate radio access and backhaul with enhanced system flexibility and functional concentration. The concept of mobile fronthaul (MFH: mobile fronthaul) has been proposed by some operators (eg, China Mobile) for the deployment of cloud-resident access network (C-RAN). Such as figure 1 As shown, for C-RAN, stacked baseband units (BBUs) implement common baseband processing and convert analog Orthogonal Frequency Division Multiplexing (OFDM) vector (I / Q: In-phase / Quadrature) data into common public radio interface (CPRI) frames. When the remo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L27/38H04J14/02
Inventor 叶晨晖高震森张凯宾
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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