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Base band unit, base band processing unit (BBU), remote radio unit (RRU) and base station

A baseband unit and baseband technology, which is applied in the field of baseband unit, BBU, RRU and base station, can solve the problems of hidden dangers of product stability, difficulties in technical implementation, and cost increase

Inactive Publication Date: 2012-01-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

exist figure 2 As shown in the network connection topology diagram, one RRU requires a data bandwidth of 10Gbps, and cascading three RRUs requires a data bandwidth of 30Gbps. Such a large interface rate not only requires a large amount of optical fiber resources, which increases the cost, but also enables the technology to realize It becomes very difficult and brings great hidden dangers to product stability; similarly, if 100 RRUs are switched to the BBU through the switching network, then the switching network needs to have a data switching capacity of 1000Gbps, which obviously poses a challenge to the switching network. huge demands

Method used

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  • Base band unit, base band processing unit (BBU), remote radio unit (RRU) and base station
  • Base band unit, base band processing unit (BBU), remote radio unit (RRU) and base station
  • Base band unit, base band processing unit (BBU), remote radio unit (RRU) and base station

Examples

Experimental program
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specific Embodiment 1

[0179] Such as Figure 7 As shown, taking the 3GPP LTE system as an example, in the uplink direction from RRU to BBU, all processing resources before channel decoding are placed in RRU, and all processing resources after channel decoding (including channel decoding) are placed in In the BBU, that is, the baseband demodulation module in the baseband unit for the uplink direction is located in the RRU, and the decoding module is located in the BBU. What is transmitted on the interface between the BBU and the RRU is the soft bit information after demodulation and before decoding.

[0180] Specifically, in the uplink direction from the RRU to the BBU, the antenna in the RRU receives the uplink data, and after being processed by modules such as power amplification and digital intermediate frequency in the RRU, and then processed by modules such as channel estimation, equalization, and demodulation, the data generated by each user is generated. soft bit information, and transmit th...

specific Embodiment 2

[0191] Such as Figure 8 As shown, taking the 3GPP LTE system as an example, in the uplink direction from RRU to BBU, all processing resources before channel decoding are placed in RRU, and all processing resources after channel decoding (including channel decoding) are placed in In the BBU, that is, the baseband demodulation module in the baseband unit for the uplink direction is located in the RRU, and the decoding module is located in the BBU. What is transmitted on the interface between the BBU and the RRU is the soft bit information after demodulation and before decoding.

[0192] Specifically, in the uplink direction from the RRU to the BBU, after the antenna in the RRU receives the uplink data, it is processed in the RRU by modules such as power amplification and digital intermediate frequency, and then processed by modules such as channel estimation, equalization, and demodulation to generate The soft bit information of each user, and transmit the soft bit information...

specific Embodiment 3

[0203] Such as Figure 9As shown, taking the 3GPP LTE system as an example, in the uplink direction from RRU to BBU, all processing resources before MAC layer processing are placed in RRU, and all processing resources after MAC layer processing (including MAC layer processing) are placed in In the BBU, namely: the baseband demodulation module and the decoding module in the baseband unit for the uplink direction are both located in the RRU. Before the physical layer processing, the data after the MAC layer processing is transmitted on the interface between the BBU and the RRU.

[0204] Specifically, in the uplink direction from the RRU to the BBU, after the antenna in the RRU receives uplink data, it is processed in the RRU by modules such as power amplification and digital intermediate frequency, and then undergoes channel estimation, equalization, demodulation, channel decoding, etc. After processing, the data processed by the physical layer is obtained, and the data is tran...

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Abstract

The invention discloses a base band unit, a base band processing unit (BBU), a remote radio unit (RRU) and a base station. In the technical scheme, the function of the base band unit is newly divided in the BBU and the RRU, i.e. the function of the base band unit is newly divided in the BBU and the RRU before the base band data enters the digital medium frequency, so partial function modules of the existing BBU (such as a base band modulation module and a base band demodulation module, or a coding module and a decoding module to a further extent) can be arranged into the RRU, at the time, data carried by an interface between the BBU and the RRU is media access control (MAC) data or soft bit information instead of intelligence quotient (IQ) data, so the data throughput of the interface between the BBU and the RRU can be reduced, further, the cost of the base station is reduced, and the technology realization difficulty is reduced.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular to a base band unit, BBU, RRU and base station. Background technique [0002] In the existing wireless communication system, the base station (NodeB) of the access network is usually composed of an indoor baseband processing unit (Building Base band Unit, BBU) and a radio remote unit (Radio Remote Unit, RRU). The BBU and the RRU Data exchange through the interface, such as figure 1 shown. At present, the existing division of BBU and RRU is based on the baseband data entering the digital intermediate frequency. In this way, the I signal and Q signal before the digital intermediate frequency processing are transmitted on the interface between the BBU and the RRU. [0003] A Long Term Evolution (LTE) system usually supports a bandwidth of 20 MHz, and in order to increase processing performance, multiple antennas are usually configured. According to the interface division ...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L25/03
CPCH04W88/085H04L25/02
Inventor 许进吴明皓
Owner ZTE CORP
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