Radio Remote Unit SRS Buffering Reduces Bandwidth
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Solution Overview
Problem
In distributed base station architectures, the radio remote unit (RRU) faces high bandwidth requirements for transmitting sounding reference symbol (SRS) sampled data from a large scale antenna array to the baseband processing unit, leading to increased network deployment challenges.
Innovation Solution
The RRU buffers and compresses SRS sampled data before transmitting it, allowing for a longer transmission period and reducing bandwidth needs by identifying SRS data through received identification information and processing it in groups, thereby optimizing data processing and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RRU receives and transmits SRS sampled data from a large scale antenna array in real-time, then the data transmission completeness is improved, but the bandwidth requirement increases excessively
Solution Approach 1:
The patent applies preliminary action by buffering SRS sampled data in the RRU before transmission. The RRU receives sampled data from multiple antennas over a first period, buffers it locally, and then transmits the buffered data over a second period that is longer than the first period. This preliminary buffering action allows the system to maintain complete data transmission while reducing the instantaneous bandwidth requirement.
Solution Approach 2:
The patent applies dynamics by dynamically adjusting the transmission timing of buffered data. The RRU identifies whether received data is SRS sampled data and dynamically determines to buffer and transmit it over an extended period. This dynamic timing adjustment allows the system to reduce bandwidth requirements while ensuring complete data delivery.
2Quantity of substance
If the RRU buffers SRS sampled data for extended transmission, then the bandwidth requirement is reduced, but the transmission time increases
Solution Approach 1:
The patent applies parameter changes by modifying the time distribution parameters of data transmission. Instead of transmitting data in real-time with short duration, the system buffers data and transmits it over an extended second period. This parameter change in transmission timing reduces the required bandwidth while accepting a longer transmission duration.
3Productivity
If the RRU identifies and processes only SRS sampled data, then the processing efficiency is improved, but the system complexity increases
Solution Approach 1:
The patent applies the taking out principle by extracting and identifying only SRS sampled data from the received sampled data. The RRU examines received data and selectively buffers only the SRS sampled data, separating it from other data types. This extraction approach improves processing efficiency by focusing on specific data while adding minimal complexity through identification logic.
Data Source
AI summary
Embodiments of the present invention disclose a sounding reference symbol SRS transmission method and a radio remote unit. The method, performed by a radio remote unit, includes: receiving a plurality of pieces of sampled data in a first period by using each antenna of an antenna array; if all of the plurality of pieces of sampled data are the SRS sampled data, buffering the plurality of pieces of sampled data; and reading the plurality of pieces of sampled data from the buffer in a second period, and sending the read plurality of pieces of sampled data to a baseband processing unit, where duration of the second period is longer than duration of the first period. Thus according the embodiments of the present invention, a time for transmitting the SRS sampled data is prolonged, so that bandwidth required for transmitting the SRS sampled data can be reduced.