Concurrent Uplink Control Channel Transmission Power Management
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Solution Overview
Problem
Wireless communication systems face collisions between low latency and non-low latency uplink transmissions, leading to reduced throughput and potential operational issues for user equipment (UE) due to overlapping scheduled transmissions on different channels.
Innovation Solution
User equipment (UE) employs concurrent transmission techniques by determining whether to transmit on physical uplink control channel (PUCCH) or shortened PUCCH (sPUCCH) based on configuration, capability, and transmission power requirements, allowing for flexible power allocation between channels to manage overlapping transmissions effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE is scheduled for uplink transmissions on more than one channel, then the UE can maintain communication on multiple channels, but collisions between uplink transmissions may occur reducing throughput and affecting transmission power parameters
Solution Approach 1:
The patent segments the uplink control information into two distinct types: low latency UCI and non-low latency UCI. Each type is transmitted on separately configured channels (sPUCCH for low latency, PUCCH for non-low latency), preventing collisions by dividing the transmission resources according to latency requirements
Solution Approach 2:
The patent introduces a new time dimension by implementing different TTI durations - shortened TTI for low latency communications and regular TTI for non-low latency communications. This dimensional separation in time allows concurrent transmissions without collision
2Adaptability or versatility
If a UE is scheduled for uplink transmissions on more than one channel, then the UE can maintain communication on multiple channels, but collisions may affect the UE's ability to operate within defined transmission power parameters
Solution Approach 1:
The patent segments transmission power management by configuring separate power parameters for low latency and non-low latency channels. The UE applies different power control settings (e.g., different P0, alpha values) to each channel type, ensuring compliance with defined power parameters while maintaining multi-channel operation
Solution Approach 2:
The patent implements dynamic transmission power adjustment where the UE can flexibly allocate power between concurrent low latency and non-low latency channels based on instantaneous channel conditions, QoS requirements, and power availability, while maintaining operation within defined power parameters
3Productivity
If the UE transmits on both PUCCH and sPUCCH concurrently, then both low latency and non-low latency UCI can be transmitted, but transmission power requirements may not be met
Solution Approach 1:
The patent implements dynamic power allocation where the UE flexibly distributes transmission power between PUCCH and sPUCCH based on instantaneous channel conditions, QoS requirements, and available power budget. The power distribution is adjusted dynamically rather than fixed, allowing optimal utilization of the power budget for concurrent transmissions
Solution Approach 2:
The patent changes transmission parameters including power spectral density, transmit power level, and resource allocation based on the specific combination of active channels and current power budget. By adjusting these parameters dynamically, the system maintains UCI transmission throughput while respecting power constraints
Data Source
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AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may be scheduled for overlapping or concurrent uplink control information (UCI) transmissions on a non-low latency channel (e.g., physical uplink control channel (PUCCH)) and a low latency channel (shortened PUCCH (sPUCCH)). The UE may transmit on PUCCH or on sPUCCH, or both, according to the UE's configuration or capability. The UE may transmit low latency UCI on PUCCH and refrain from transmitting on sPUCCH, or the UE may transmit on sPUCCH and refrain from transmitting on PUCCH. In other examples, the UE may transmit on PUCCH and sPUCCH concurrently. The UE may split power between the PUCCH and sPUCCH so that the combined power of the two transmissions remains within a transmission power budget. In other examples, the UE may switch between concurrent transmissions and transmitting on one channel while refraining from transmitting on another channel.