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Central baseband processing unit and network architecture for indoor communication system

A baseband processing and indoor communication technology, applied in wireless communication, electrical components, optical fiber transmission, etc., can solve the problems of optical fiber resource consumption, high layout cost, high attenuation, etc., and achieve the effect of low investment requirements

Active Publication Date: 2019-10-11
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] But for densely deployed mRRH scenarios, fiber resource consumption is a problem
For example, 4*4MIMO with 4 wavelengths will have 4 signals in different RF channels, and the deployment cost is also high
Also, there are other issues like the attenuation is still high due to the high frequency

Method used

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  • Central baseband processing unit and network architecture for indoor communication system
  • Central baseband processing unit and network architecture for indoor communication system
  • Central baseband processing unit and network architecture for indoor communication system

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Experimental program
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Embodiment Construction

[0048] The core idea of ​​the new backhaul solution according to the present invention lies in:

[0049] 1) Modulate different channels or mRRH signals to adjacent frequencies

[0050] For indoor networks, the demand for high throughput of MIMO is a big trend. However this is difficult to implement with conventional RF based DAS as it requires different RF channels, 2x cables, couplers, combiners etc. in total. However, deployment can easily be done with the help of the new intelligent indoor system according to the present invention.

[0051] Here, a frequency shifting scheme will be proposed to reduce the requirements on the backhaul. For example, to implement 4x4 MIMO, traditional designs require four separate RF channels to handle different signals. In the design of the present invention, 4 signals will be combined in a digital intermediate frequency (DIF) and modulated onto 4 different frequency bearers by means of a digitally controlled oscillator, wherein these beare...

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PUM

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Abstract

The invention provides a central baseband processing unit for an indoor communication system. The central baseband processing unit is connected with a plurality of micro-power radio remote unit heads by fibers. Each micro-power radio remote unit head has a plurality of radio-frequency channels. The central baseband processing unit comprises a digital intermediate frequency processing module for modulating signals of all radio-frequency channels into ones with intermediate frequencies. A plurality of frequency bands corresponding to the multiple radio-frequency channels of one micro-power radio remote unit head are spaced from each other at a first frequency interval; and multiple frequency bands corresponding to the micro-power radio remote unit heads are separated from each other at a second frequency interval. Therefore, requirements of the coverage range and the capacity can be met; and the return stroke requirement is low. According to the invention, a novel topological structure can be realized and the arrangement cost of the network can be reduced.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a central baseband processing unit for an indoor communication system, a network architecture and a method for reducing backhaul resource consumption in the central baseband processing unit. Background technique [0002] Over the past few decades, mobile traffic data has grown exponentially, which has led to the need for high capacity and better coverage of cellular networks. Since 70% of data services take place indoors, it is also necessary to meet the needs of indoor scenarios. However, using traditional homogeneous networks with outdoor macro base stations for indoor coverage is problematic due to severe outdoor-to-indoor penetration loss. [0003] The architecture of a traditional Distributed Antenna System (DAS) includes optical fibers, couplers, frequency dividers (dividers) and passive antennas. DAS is often used to meet the coverage requirements of multiple op...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W88/08H04B10/2575
Inventor 唐彦波
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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