Uplink Collision Handling via Priority Segmentation
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Solution Overview
Problem
Existing wireless communication systems face challenges in handling uplink collisions between channels with different priorities or service types, leading to increased latency and reduced reliability, particularly for high-priority or low-latency transmissions.
Innovation Solution
A user equipment (UE) is equipped with a collision resolution configuration that prioritizes transmissions based on channel priorities, service types, or types of information, allowing separate codebooks for different priorities and resolving collisions by dropping or multiplexing lower priority transmissions to ensure higher priority information is transmitted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiplexing techniques are used to handle uplink collisions, then resource utilization is improved, but transmission latency increases and reliability decreases
Solution Approach 1:
The patent segments uplink transmissions into different priority levels (first priority and second priority). When collisions occur, the system separately handles high-priority transmissions (such as URLLC) and low-priority transmissions (such as eMBB), allowing high-priority data to be transmitted immediately while low-priority data is multiplexed or deferred, thus reducing latency for critical transmissions while maintaining resource utilization.
Solution Approach 2:
The patent applies different collision handling strategies to different parts of the transmission based on priority. High-priority transmissions receive preferential treatment (immediate transmission, resource pre-emption) while low-priority transmissions undergo multiplexing or dropping. This localized quality differentiation resolves the contradiction by ensuring low latency for critical data while maintaining overall resource efficiency.
2Productivity
If multiplexing techniques are used to handle uplink collisions, then resource utilization is improved, but transmission reliability decreases
Solution Approach 1:
The patent segments transmissions by priority level, creating separate handling paths for high-priority and low-priority data. High-priority transmissions are protected from multiplexing with low-priority data, ensuring their reliability is not compromised. Low-priority transmissions are multiplexed only when they do not conflict with high-priority transmissions, thus maintaining overall resource utilization while preserving reliability for critical communications.
Solution Approach 2:
Different reliability guarantees are applied locally to different priority levels. High-priority transmissions receive enhanced reliability protection through separate resource allocation and pre-emption mechanisms, while low-priority transmissions accept lower reliability in exchange for higher resource utilization. This resolves the contradiction by ensuring reliability where needed while maintaining productivity overall.
3Reliability
If separate codebooks are used for different priority levels, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements separate HARQ-ACK codebooks for different priority levels (first codebook for first priority, second codebook for second priority). This segmentation allows independent handling and reporting of acknowledgments for high-priority and low-priority transmissions, improving reliability by ensuring critical acknowledgments are not lost or confused. The complexity increase is managed through standardized codebook structures and clear prioritization rules.
4Reliability
If high priority transmissions are prioritized over low priority transmissions during collisions, then transmission reliability is improved, but resource utilization decreases
Solution Approach 1:
The patent establishes preliminary prioritization rules and collision resolution configurations before collisions occur. The UE is pre-configured with instructions on how to handle collisions between different priority levels, including which resources to pre-empt and how to multiplex lower-priority transmissions. This preliminary action ensures high-priority transmissions are reliably protected while allowing efficient resource utilization through predefined multiplexing strategies for low-priority data.
Data Source
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Figure 3A~3C
AI summary
Methods, systems, and devices are described for handling transmissions or channels in wireless communications that collide with one another. The described techniques relate to handling the collision between multiple overlapping channels (e.g., two or more channels of the same priority). For example, a collision resolution configuration may include resolving the collisions among the channels of the same priority first (e.g., feedback information transmissions first, and then control information), among the channels of the same service type first (e.g., normal channels first, and then low latency channel(s)), or across all of the channels of all priorities at once. Collisions may be resolved by dropping or rescheduling overlapping information from the lower priority transmission(s) or channel(s) in consideration of the higher priority transmission(s) or channel(s), or by multiplexing or piggybacking overlapping information from a first priority transmission(s) or channel(s) with a second priority transmission(s) or channel(s).