Optical fiber time delay compensation method and device suitable for long term evolution (LTE) system

A time-delay compensation and optical fiber technology, applied in optical fiber transmission, multi-frequency code system, etc., can solve problems such as buffer space bottleneck and difficult to meet demand

Active Publication Date: 2013-03-20
POTEVIO INFORMATION TECH
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Problems solved by technology

[0008] It can be seen from Table 1 that the number of storage units at the downlink sending end is proportional to the distance and the number of antennas. When 8 antennas are transmitted and the fiber is extended to 40 kilometers, the required buffer space is 192KB. If the buffer space is If implemented in the baseband processing unit, when the baseband processing unit processes multiple cells, the on-chip buffer space will become a bottleneck and it is difficult to meet the demand

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  • Optical fiber time delay compensation method and device suitable for long term evolution (LTE) system
  • Optical fiber time delay compensation method and device suitable for long term evolution (LTE) system
  • Optical fiber time delay compensation method and device suitable for long term evolution (LTE) system

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Embodiment Construction

[0034] The present invention adjusts the processing flow and processing method of downlink transmission, and starts the symbol-level processing of downlink transmission according to the fiber transmission delay of each cell, and realizes delay compensation by buffering bit-level data. The solution of the present invention can significantly Reduce the internal cache of the baseband processing unit and remote radio unit.

[0035] The core technical features of the solution of the present invention include:

[0036] 1. The optical fiber delay buffer is implemented in the bit domain and can be multiplexed with the resource mapping buffer space. The space occupied by the optical fiber delay buffer is not directly related to the number of antennas;

[0037] 2. The time to start the baseband signal processing is related to the fiber transmission delay of the cell. The start time of the cell with a large fiber transmission delay is earlier, while the start time of the cell with a smal...

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Abstract

The invention provides an optical fiber time delay compensation method suitable for a long term evolution (LTE) system. The optical fiber time delay compensation method suitable for the LTE system comprises the following steps: step A, conducting bit field processing to lower level sending signals; step B, conducting caching to the lower level sending signals in bit field; step C, conducting resource mapping to the cached lower level sending signals of the bit field, and transferring the lower level sending signals after resource mapping into frequency division multiplexing (OFDM) signs; step E, conducting middle radio frequency processing to the OFDM signs. The invention further provides an optical fiber time delay compensation device suitable for the LTE system.

Description

technical field [0001] The invention relates to mobile communication and optical fiber communication technologies, in particular to an optical fiber time delay compensation method and device suitable for LTE systems. Background technique [0002] Remote radio technology has been widely used in current communication systems, where radio frequency units and antenna units are arranged in places where communication signal coverage is required, and baseband processing units can be managed centrally, which not only solves the problem of location selection of base stations and radio frequency pull The problem of feeder loss between the remote unit and the antenna, and the centralized management of the baseband processing unit can bring a series of benefits such as cost control and resource sharing. [0003] The baseband processing unit and the radio remote unit are connected by optical fiber. Due to factors such as the density of the station layout and location selection, the remot...

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Application Information

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IPC IPC(8): H04L27/26H04B10/25
Inventor 周明明丁阳孙洋洋
Owner POTEVIO INFORMATION TECH
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