Uplink Channel Multiplexing and Cancellation Control
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently managing uplink transmissions with different priorities, leading to overlapping or colliding UL channels, which can result in reduced performance due to the inability to transmit two parallel channels simultaneously.
Innovation Solution
The system allows User Equipment (UE) to receive configurations from a base station to either cancel or multiplex low priority UL channels with high priority UL channels, enabling independent transmission or simultaneous transmission of both channels based on received conditions, such as power headroom and coding rate thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the system transmits both low priority and high priority UL channels simultaneously, then communication throughput is improved, but transmission reliability deteriorates due to channel overlapping and collision
Solution Approach 1:
The patent implements dynamic transmission control where the UE adapts its transmission behavior based on real-time channel conditions and priority levels. The system dynamically switches between simultaneous transmission, multiplexing, and cancellation modes depending on the overlap situation and configured parameters, resolving the contradiction between throughput and reliability through adaptive decision-making
Solution Approach 2:
The patent segments the uplink transmission into distinct priority levels (low priority and high priority channels) and applies different transmission strategies to each segment. By separating the handling of different priority traffic, the system can optimize throughput for low-priority data while ensuring reliability for high-priority data through selective multiplexing or cancellation
2Reliability
If the system cancels low priority UL channel transmission to ensure high priority transmission, then transmission reliability is improved, but communication throughput deteriorates
Solution Approach 1:
The patent changes the transmission parameter (cancellation vs. multiplexing) based on configured thresholds including power headroom thresholds and coding rate thresholds. By adjusting these parameters dynamically, the system optimizes the balance between ensuring high-priority reliability and maintaining overall throughput, rather than using a fixed cancellation policy
3Productivity
If the system multiplexes low priority and high priority UL channels, then resource utilization is improved, but transmission complexity increases
Solution Approach 1:
The patent enables the UE to autonomously make multiplexing decisions based on pre-configured parameters and real-time channel conditions, without requiring complex real-time network control. The self-service approach allows the device to handle the transmission complexity locally while the network only provides configuration guidance, resolving the contradiction between resource utilization and control complexity
Data Source
AI summary
A UE may receive, from a base station, a first configuration associated with transmitting a low priority UL channel and a second configuration associated with transmitting a high priority UL channel concurrent in time with the low priority UL channel. The UE may cancel the transmission of the low priority UL channel to transmit the high priority UL channel independently, or multiplex the low priority UL channel with the high priority UL channel to transmit both the low priority UL channel and the high priority UL channel together based on a third configuration received from the base station or at least one condition. At least one condition includes a power headroom, a coding rate of high priority data/UCI, or a percentage of resource in high UL channel that is taken by low priority UL transmissions.