CPRI Link Congestion Avoidance via I/Q Data Segmentation
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Solution Overview
Problem
Current CPRI data transmission in radio base stations can lead to congestion and data loss due to the large amount of user-plane data being transmitted over a single link, which is not efficiently managed, especially in scenarios with multiple REs forming chains, stars, or rings.
Innovation Solution
The solution involves dividing I/Q data into multiple paths with different content and transmitting these paths over at least two CPRI links, allowing each path to have unique content and utilizing multiple links to distribute the data load, thereby preventing congestion and ensuring reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all user-plane data is transmitted through a single CPRI link, then the data transmission path is simple, but the link becomes congested and data may be lost
Solution Approach 1:
The invention divides user-plane data into multiple data streams and transmits them through different CPRI links. Specifically, I/Q data is segmented into multiple paths where each path carries a portion of the total data load, thereby distributing the transmission burden across multiple links and preventing congestion on any single link while maintaining transmission reliability.
2Reliability
If one CPRI link is used for user-plane data and another for link detection, then link monitoring is enabled, but user-plane data transmission capacity is limited
Solution Approach 1:
The invention segments the data transmission function by separating control-plane data (including link detection) from user-plane data. Control-plane data continues to use dedicated links for monitoring, while user-plane data is divided into multiple streams transmitted through separate CPRI links, thereby enabling both reliable link detection and high-capacity user data transmission simultaneously.
Solution Approach 2:
The invention adds a new dimension to data transmission by utilizing multiple CPRI links in parallel for user-plane data. Instead of relying on a single link, the system employs multiple links operating simultaneously, each carrying a portion of the user-plane traffic, thereby expanding the total transmission capacity without compromising the dedicated link detection capability.
3Productivity
If multiple CPRI links are used to transmit user-plane data, then transmission capacity increases, but data segmentation and recombination complexity increases
Solution Approach 1:
The invention implements segmentation at the data stream level, where I/Q data is divided into multiple manageable portions that can be independently transmitted and later recombined. This segmentation approach balances the need for increased transmission capacity with the requirement for manageable data processing complexity at each network node.
Data Source
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AI summary
A method for transmitting Common Public Radio Interface, CPRI, data in a radio base station is provided, which is applicable to the radio base station having at least two CPRI links between a Radio Equipment Control, REC, and a Radio Equipment, RE. The method includes: dividng, by the REC, in-phase/quadrature phase, I/Q, data that needs to be transmitted to the RE into multiple paths of I/Q data with different content, where the multiple paths of I/Q data with different content make up the I/Q data before being divided; transmitting, by the REC, all paths of divided I/Q data to the RE over the at least two CPRI links. A radio base station and a method for processing CPRI data in a radio base station are provided. Through the method for transmitting CPRI in a radio base station, the method for processing CPRI data in a radio base station, and the radio base station, congestion of CPRI links is avoided when the amount of user-plane data is large.