A wireless access system based on c-ran

A wireless access system and baseband processing technology, which is applied in the field of C-RAN-based wireless access technology, can solve problems such as not supporting large-scale CPRI circuit domain switching, achieve real-time understanding of system working conditions, and realize payload length , the effect of reducing bandwidth requirements

Active Publication Date: 2019-08-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

[0004] Currently, the CPRI rate of TD-LTE 8-antenna 20MHz single-carrier RRU universal radio interface is 9.8304Gbps. High-bandwidth and high-real-time data transmission brings enormous pressure to the switching network. The existing switching network does not support large-scale CPRI. circuit domain switching

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  • A wireless access system based on c-ran
  • A wireless access system based on c-ran
  • A wireless access system based on c-ran

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Embodiment Construction

[0017] Such as figure 1 Shown is the C-RAN-based wireless access system of the invention, which includes a centralized baseband processing pool, transmission network, digital front end, and RRU. The transmission network is responsible for data interaction between the centralized baseband processing pool and the digital front end. The centralized baseband processing pool is responsible for the processing of the baseband link at the physical layer, and packs the effective data in the frequency domain after RE mapping and sends it to the digital front end through the transmission network; at the same time, the centralized baseband processing pool analyzes the status packets sent by the digital front end to understand The working status of other devices, and give corresponding control packets to the digital front end to realize real-time dynamic configuration. The digital front end implements as Figure 4 Part of the physical layer baseband link processing process shown, sends t...

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Abstract

The present invention provides a wireless access system based on C-RAN, including a centralized baseband processing pool, a transmission network, a radio remote unit RRU, and a digital front end. The centralized baseband processing pool communicates with the digital front end through the transmission network, and the digital front end also Communicate with RRUs. The present invention uses a digital front-end to process CPRI data, and realizes part of the physical layer processing function in the digital front-end. In this way, only the processed CPRI data needs to be interacted with the baseband pool, and only the data in the frequency domain is transmitted between the centralized baseband processing pool. Effective data, reducing redundant data transmission, greatly reducing the demand for data transmission on switching network bandwidth, that is, reducing the bandwidth demand on the CPRI side and supporting more RRU access. The invention reduces the bandwidth requirement in the process of data transmission, understands the working condition of the system in real time, configures it dynamically in real time, and realizes maximum bandwidth utilization and resource scheduling optimization.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular to C-RAN-based wireless access technology. Background technique [0002] With the rapid development of the mobile Internet, the number of mobile users and business volume have increased rapidly, and the number of wireless communication base stations has increased dramatically. In the traditional cellular network, each base station processes terminal signals in the coverage area, and each base station needs its own cooling equipment, background transmission equipment, backup power supply, monitoring system, etc. Obviously, with the increase in the number of users and services of traditional base stations, the processing load surges, which significantly increases the energy consumption and operation and maintenance costs of the base station. The C-RAN technology optimizes the network architecture, adopts a heterogeneous approach, and introduces a hardware acceleration plat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/16H04W88/08
CPCH04W28/16H04W88/085
Inventor 阎波王勇黎俣珩宫也江官露
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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