Uplink Channel Prioritization via PHY-Layer Puncturing
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Solution Overview
Problem
Current wireless communication technologies, such as LTE and NR, face challenges in efficiently prioritizing uplink channel communications, particularly in scenarios where different traffic types with varying latency and reliability requirements overlap, leading to increased latency and resource inefficiencies.
Innovation Solution
The implementation of PHY-layer prioritization techniques that allow for on-the-fly selection and transmission of high-priority communications, such as ultra-reliable low-latency communications (URLLC), by dropping or puncturing overlapping lower-priority communications, thereby reducing latency and conserving resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple traffic types with varying latency requirements are transmitted using shared uplink resources, then resource utilization is improved, but latency for high-priority communications increases
Solution Approach 1:
The patent implements dynamic prioritization at the physical layer where the UE can flexibly select which communication to transmit based on real-time priority assessments. The system dynamically adjusts transmission behavior by comparing latency requirements and traffic types, allowing high-priority communications to preempt lower-priority ones when conflicts arise, thus resolving the contradiction between resource sharing and latency performance.
2Device complexity
If overlapping communications are transmitted using traditional MAC layer prioritization, then resource allocation is simplified, but latency for ultra-reliable low-latency communications (URLLC) increases
Solution Approach 1:
The patent segments the prioritization function into two layers: MAC layer handles basic resource allocation while PHY layer handles urgent priority decisions. This segmentation allows PHY-layer operations to independently prioritize URLLC communications by puncturing or dropping overlapping eMBB transmissions, reducing URLLC latency without requiring complete redesign of the MAC layer architecture.
Solution Approach 2:
The patent establishes pre-configured priority rules and thresholds that enable the UE to make immediate prioritization decisions without complex real-time negotiations. By pre-defining which traffic types have higher priority under specific conditions, the system reduces decision latency for URLLC communications while maintaining manageable system complexity.
3Loss of time
If PHY-layer prioritization is implemented to enable immediate transmission of high-priority communications, then latency is reduced, but device complexity increases
Solution Approach 1:
The patent implements prioritization logic specifically at the PHY layer for uplink transmissions, rather than uniformly across all protocol layers. The UE's PHY layer is equipped with specific functionality to assess communication priorities and execute puncturing or dropping operations locally, without requiring complex coordination with other layers. This localized implementation reduces overall system complexity while achieving low-latency performance.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may select a first communication, associated with a first traffic type, or a second communication, associated with a second traffic type, as a selected communication for transmission in an overlapping resource, wherein the first communication and the second communication at least partially overlap in time, and wherein the selection is performed based at least in part on a rule; and transmit the selected communication. Numerous other aspects are provided.