RRU Selection Decision for Downlink Carrier Signal Optimization
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Solution Overview
Problem
In networking scenarios, especially in high-speed rail and residential areas, remote radio units (RRUs) sharing downlink carrier signals lead to increased power consumption and network interference, necessitating a method to timely switch and select suitable RRUs for transmission to reduce these issues.
Innovation Solution
A downlink direction RRU selection decision method and apparatus that determines, based on current downlink and uplink measurement items, and power specifications, which RRU(s) should transmit the downlink carrier signal, allowing for switching between single, dual, and multi-transmission modes to optimize signal quality and reduce interference and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple RRUs transmit downlink carrier signals simultaneously, then signal coverage and reliability are improved, but power consumption and network interference increase
Solution Approach 1:
The patent implements dynamic RRU selection where the system continuously monitors uplink reception levels and downlink measurement items, and adjusts the transmitting RRU configuration in real-time based on current channel conditions. This allows the system to switch between single RRU transmission (for power saving) and multiple RRU transmission (for reliability) dynamically, rather than maintaining a fixed configuration.
Solution Approach 2:
The system changes operational parameters by selecting different RRUs based on measured channel conditions. The base station determines which RRU(s) should transmit by evaluating uplink reception levels and downlink measurement items, thereby changing the transmission state from static to adaptive, optimizing the balance between power consumption and signal reliability.
2Reliability
If multiple RRUs transmit downlink carrier signals simultaneously, then signal coverage and reliability are improved, but network interference increases
Solution Approach 1:
The system dynamically adjusts the number and selection of transmitting RRUs based on real-time channel conditions. By monitoring uplink reception levels and downlink measurement items, the system can reduce the number of active transmitting RRUs when channel conditions are good, thereby reducing network interference while maintaining signal coverage and reliability.
Solution Approach 2:
The patent employs feedback mechanisms where the base station receives uplink measurement items from RRUs and downlink measurement items from user terminals. This feedback information is used to determine the optimal RRU transmission configuration, creating a closed-loop system that adapts to changing channel conditions and minimizes interference.
3Use of energy by stationary object
If a single RRU transmits downlink carrier signal, then power consumption and network interference are reduced, but signal coverage and reliability may be insufficient
Solution Approach 1:
The system dynamically switches between single RRU and multiple RRU transmission modes based on channel conditions. When uplink reception levels and downlink measurement items indicate good channel quality, a single RRU is sufficient for power saving. When conditions deteriorate, the system automatically transitions to multiple RRU transmission to maintain reliability.
Solution Approach 2:
The system changes the transmission parameter (number of active RRUs) based on measured channel conditions. By evaluating uplink reception levels and downlink measurement items, the system adapts the transmission configuration to match current channel state, ensuring reliability is maintained only when necessary.
4Device complexity
If RRU transmission mode is fixed, then system complexity is reduced, but adaptability to changing channel conditions deteriorates
Solution Approach 1:
The patent transforms the transmission mode from static to dynamic by implementing continuous monitoring of channel conditions and automatic adjustment of RRU selection. The system adapts to changing channel conditions by evaluating uplink reception levels and downlink measurement items in real-time, thereby achieving high adaptability without requiring complex manual configuration.
Solution Approach 2:
The system performs self-optimization by automatically selecting the appropriate RRU transmission configuration based on measured channel conditions. The base station autonomously determines which RRU(s) should transmit by evaluating channel quality metrics, eliminating the need for external intervention or complex manual management while maintaining high adaptability.
Data Source
AI summary
A method includes: an RRU selection decision cycle of a current RRU shared cell arriving; and determining, according to a current downlink measurement item of a user terminal and an uplink measurement item of each RRU, that at least one RRU among the RRUs transmits a downlink carrier signal; or, determining, according to the current downlink measurement item of the user terminal, the uplink measurement item of each RRU, and power specification of each RRU, that at least one RRU among the RRUs transmits a downlink carrier signal, where a downlink channel includes: a traffic channel and a stand-alone dedicated control channel.