UE Antenna Adaptation for PUCCH Transmission
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Solution Overview
Problem
In wireless communication networks, particularly in LTE and 5G systems, there is a challenge in balancing the improvement of communication quality with the energy consumption of user equipment (UE) transmitters, as the use of multiple antennas and RF chains increases energy usage, which is a concern for devices with finite battery power.
Innovation Solution
The UE dynamically selects combinations of antennas and transmitters based on quality and power consumption metrics to optimize energy use while maintaining desired reception quality, using configurations for single-layer transmissions and determining optimal combinations through metrics like SINR and BLER, and adjusting based on channel conditions and feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antennas and RF chains are used for PUCCH transmission, then communication quality and reliability are improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic selection of antenna and RF chain configurations based on current channel conditions and quality requirements. The system transitions from static multi-antenna usage to dynamic adaptation, selecting only the necessary number of antennas and RF chains needed to meet the target quality threshold, thereby reducing energy consumption while maintaining reliability.
Solution Approach 2:
The system changes operational parameters (number of active antennas and RF chains) based on channel conditions and quality metrics. By adjusting these parameters dynamically rather than maintaining fixed high configurations, the system achieves the desired communication quality with minimal energy expenditure.
2Reliability
If all available antennas and transmitters are activated, then reception quality is maximized, but device complexity and power consumption increase
Solution Approach 1:
Instead of activating all available antennas and transmitters, the system applies partial action by selecting only the minimum necessary subset required to achieve the target reception quality. This reduces device complexity and power consumption while maintaining adequate performance through selective activation of components.
3Use of energy by moving object
If dynamic antenna selection is implemented, then energy consumption is reduced, but measurement and selection complexity increases
Solution Approach 1:
The system performs preliminary measurements and evaluations of channel conditions and quality metrics before making antenna selection decisions. By preparing quality metric evaluations in advance and using predefined selection criteria, the system reduces the complexity of real-time decision-making while achieving energy-efficient antenna configuration.
Data Source
AI summary
Embodiments include methods, performed by a user equipment (UE), for uplink (UL) transmission in a wireless network. Such methods include receiving a configuration associated with an UL transmission to a network node in the wireless network. Such methods include, for each of a plurality of combinations of the UE's available antennas and transmitters, determining metrics based on the UE performing the UL transmission using the particular combination. The metrics include a quality metric associated with reception of the UL transmission by the network node, and a UE energy consumption metric. Such methods include selecting one of the plurality of combinations of the available antennas and transmitters based on the respective quality metrics and the respective UE power consumption metrics, and performing the UL transmission according to the configuration and using the selected combination of available antennas and transmitters. Other embodiments include UEs configured to perform such methods.