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Data compression and decompression method, device and system in distributed base station system

A distributed base station and decompression technology, applied in the field of communications, can solve the problems of high development and manufacturing costs, complex implementation of decompression methods, etc., to reduce equipment costs and improve product competitiveness.

Active Publication Date: 2017-03-22
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a data compression and decompression scheme in a distributed base station system, so as to at least solve the problem of complex implementation of data compression and decompression methods transmitted between BBU and RRU in the above-mentioned related technologies, and high development and manufacturing costs. The problem

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  • Data compression and decompression method, device and system in distributed base station system
  • Data compression and decompression method, device and system in distributed base station system
  • Data compression and decompression method, device and system in distributed base station system

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Embodiment 1

[0072] The invention proposes a method and device for data compression and decompression between BBU and RRU of a distributed base station system, which solves the problem of excessive data volume in the uplink, thereby reducing equipment costs and improving product competitiveness. It should be noted that this embodiment only takes the LTE standard as an example, and is not limited to the LTE standard system, and is also applicable to communication systems of various standards such as WiMAX, and the principle is similar to other standards, and is also applicable.

[0073] Figure 7 is a schematic diagram of uplink processing between the BBU and the RRU according to Embodiment 1 of the present invention, as shown in Figure 7 As shown, the compression part of the device in this embodiment is implemented on the RRU side, and the decompression part is implemented on the BBU side. For example, during uplink processing, the RRU receiving antenna receives the user signal, performs...

Embodiment 2

[0081] Figure 9 It is a schematic diagram of the frame structure of the CPRI basic frame BF (chip) according to the 3.072G optical port rate of the second embodiment of the present invention, as Figure 9 As shown, taking the optical interface rate of 3.072G for data exchange between the RRU and the BBU as an example, the data compression method on the RRU side provided in this embodiment will be described in detail.

[0082] Figure 10 is a schematic diagram of compression on the RRU side according to Embodiment 2 of the present invention, as shown in Figure 10 As shown, the compression process includes the following steps:

[0083] Step 1, compression processing at the RRU side. On the RRU side, the IQ data is compressed once for each antenna in units of 32 basic frames BF. In order to facilitate the corresponding decompression, the I-channel or Q-channel compression factor and uplink gain factor are added to the compressed data and transmitted together. . Figure 11 ...

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Abstract

Disclosed are a data compression and decompression method, apparatus and system in a distributed base station system. The compression method comprises the following steps: a remote radio unit (RRU) compresses the IQ data of each antenna in the unit of a predetermined number of chips according to the compression factor of the IQ data, and frames the compressed IQ data in the link frame format of a high speed interface protocol; and the RRU transmits the framed data via an optical fiber to a building baseband unit (BBU), wherein the framed data comprises the compression factor and a preamble sequence for locking the header of the predetermined number of chips. The present invention reduces equipment costs and improves the competitiveness of finished products.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method, device and system for compressing and decompressing data in a distributed base station system. Background technique [0002] The distributed base station architecture has become a development trend of wireless communication systems. Based on this architecture, the indoor baseband unit (Building Baseband Unit, referred to as BBU) and the remote radio unit (Remote Radio Unit, referred to as RRU) can be separated and independently implemented. development, thereby reducing development costs and improving networking flexibility. Such a base station architecture has been recognized by more and more users, and there are more and more application occasions. In the distributed base station architecture, the BBU and RRU are generally arranged in a remote manner through optical fibers or other cables. One BBU can support multiple RRUs, and the remote distance can be as high as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/06
CPCH04W28/06H03M7/30H04L27/365
Inventor 王润荣李彬许兵舰
Owner ZTE CORP