Dynamic Uplink Power Control for Multi-Connectivity Transmissions
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Solution Overview
Problem
Current wireless communication systems face challenges in dynamically controlling uplink transmit power in multi-connectivity modes, leading to conflicts and inefficiencies, especially when prioritizing different services and transmission power levels across cell groups in 5G NR and LTE networks.
Innovation Solution
The method involves determining whether to multiplex uplink control information (UCI) on a physical uplink shared channel (PUSCH) based on reserved transmission power levels and priority levels associated with cell groups, allowing for dynamic power control decisions that adjust transmission power levels to reduce conflicts and optimize resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink control information is multiplexed on PUSCH to optimize resource use, then spectral efficiency improves, but transmission power conflicts increase between cell groups
Solution Approach 1:
The patent implements dynamic power control by adjusting the transmission power level based on real-time conditions in each cell group. The UE determines whether to multiplex UCI on PUSCH dynamically by comparing the required power level with the reserved power level for the first cell group, allowing flexible adaptation to changing power constraints and service priorities across different cell groups
Solution Approach 2:
The patent changes the transmission power parameter dynamically based on cell group conditions. When the required power level exceeds the reserved power level, the UE selects an alternative transmission method (such as transmitting UCI on PUCCH or dropping the transmission), thereby adjusting system behavior according to power constraints without compromising critical communications
2Reliability
If reserved transmission power level is enforced for first cell group to ensure critical signal transmission, then reliability improves, but available power for other transmissions decreases
Solution Approach 1:
The patent applies partial action by selectively enforcing the reserved power level constraint only when necessary. The UE determines whether to multiplex UCI on PUSCH based on comparing the required power level with the reserved power level, and only restricts power when the constraint would be violated, allowing full power usage when conditions permit
3Productivity
If dynamic power control is implemented to manage multi-connectivity transmissions, then resource allocation efficiency improves, but system complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the UE continuously monitors the required power level for transmissions and compares it against the reserved power level. Based on this feedback, the UE dynamically adjusts transmission decisions, selecting appropriate methods (multiplexing on PUSCH, transmitting on PUCCH, or dropping) to optimize resource allocation while managing complexity through standardized decision criteria
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for dynamically controlling uplink transmit power for multi-connectivity transmissions. An example method generally includes communicating with a first cell group and a second cell group in a multi-connectivity mode, determining whether to multiplex uplink control information (UCI) of a first transmission with a payload of a second transmission on a physical uplink shared channel (PUSCH) based at least in part on a reserved transmission power level associated with the first cell group, and transmitting, to the first cell group, at least one of the UCI or the payload based on the determination.