Transmit Antenna Switching via PUSCH and PUCCH Power Counters
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively switching transmit antennas due to insufficient receiver performance, particularly in scenarios where multipath interference affects transmit performance differently than receive performance, leading to inadequate antenna switching decisions.
Innovation Solution
A method for transmit antenna switching based on a combination of physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH) maximum transmit power level counters, along with reference signal received power (RSRP) thresholds, to determine when to switch between antennas, ensuring optimal transmit performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If antenna switching is based only on receiver performance, then the switching decision is simple to implement, but the transmit performance may not be optimal because RX performance does not always correlate with TX performance
Solution Approach 1:
The system introduces feedback mechanisms by monitoring both RX performance metrics and TX power level counters. The TX antenna switching decision incorporates feedback from PUSCH and PUCCH power level measurements, allowing the system to adapt switching decisions based on actual transmit performance conditions rather than relying solely on receiver performance indicators.
Solution Approach 2:
The system performs preliminary monitoring of transmit power levels and maintains counters for PUSCH and PUCCH power measurements before making switching decisions. By pre-calculation and continuous monitoring of TX performance metrics, the system prepares switching decisions in advance based on accumulated power level data, ensuring optimal TX performance when switching occurs.
2Reliability
If antenna switching is performed frequently to maintain optimal performance, then transmit performance is improved, but power consumption increases and network stability may be compromised
Solution Approach 1:
The system changes the parameter basis for switching decisions from simple RX performance metrics to a composite evaluation including TX power level counters and RSRP thresholds. By adjusting the decision parameters to incorporate power level measurements and threshold comparisons, the system achieves more stable and meaningful switching triggers that balance performance improvement with energy conservation.
Solution Approach 2:
The system implements partial switching action by using RSRP gating thresholds to conditionally enable or disable switching based on channel quality. When RSRP is above the gating threshold, switching is permitted; when below, switching is restricted. This partial action approach prevents unnecessary switching in poor channel conditions, reducing power consumption while maintaining performance when conditions are favorable.
3Speed
If antenna switching decisions are made rapidly based on current conditions, then responsiveness is improved, but the accuracy of switching decisions decreases due to insufficient measurement data
Solution Approach 1:
The system performs preliminary accumulation of transmit power level measurements in counters for both PUSCH and PUCCH before making switching decisions. By pre-monitoring and accumulating power level data over time, the system builds a more accurate picture of TX performance conditions, enabling more precise switching decisions while maintaining timely responsiveness.
Solution Approach 2:
The system incorporates feedback from continuous monitoring of power level counters and RSRP measurements. The switching decision mechanism receives feedback from accumulated measurement data, allowing it to make accurate decisions based on historical performance trends rather than relying solely on instantaneous conditions, thus improving decision accuracy while maintaining responsiveness.
Data Source
AI summary
A method for antenna switching is described. The method includes transmitting using a first antenna. The method also includes determining that a trigger occurs to switch to transmitting using a second antenna. The trigger is based on a combination of a physical uplink shared channel (PUSCH) maximum transmit power level (MTPL) counter and a physical uplink control channel (PUCCH) MTPL counter. The method further includes switching to transmitting using the second antenna based on the determination.