Uplink Channel Multiplexing for Priority Overlap in UE Scheduling
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in handling overlapping uplink channels with different priorities, leading to detrimental spectral efficiency and UE perceived throughput, particularly when low-priority transmissions are consistently dropped to prioritize high-priority transmissions.
Innovation Solution
Implement mechanisms for multiplexing and prioritization of high-priority and low-priority uplink transmissions, allowing flexible resource management without compromising Quality of Service (QoS) requirements, by employing two-step procedures to resolve overlapping channels with different priorities, including multiplexing and cancellation rules based on priority indices and timelines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low priority transmission is always dropped in case of overlap with high priority transmission, then high priority transmission reliability is ensured, but spectral efficiency and throughput for low priority transmission deteriorate
Solution Approach 1:
The patent implements dynamic prioritization where the UE can adaptively switch between dropping and multiplexing low priority transmissions based on real-time conditions. The network can dynamically configure the UE's behavior through RRC signaling, allowing the system to optimize between reliability and spectral efficiency depending on current network state, traffic conditions, and QoS requirements.
Solution Approach 2:
The patent changes the parameter of transmission handling from a fixed 'drop' action to a configurable action that can be either 'drop' or 'multiplex'. The network can configure different priority levels, multiplexing behaviors, and resource allocation parameters dynamically, allowing flexible adjustment of system behavior to resolve the contradiction between ensuring high priority reliability and maintaining overall spectral efficiency.
2Reliability
If low priority transmission is always dropped in case of overlap with high priority transmission, then high priority transmission reliability is ensured, but throughput for low priority transmission deteriorates
Solution Approach 1:
The system dynamically adjusts whether to drop or multiplex low priority transmissions based on network configuration and current conditions. When multiplexing is configured, low priority data can be transmitted alongside high priority data, maintaining throughput while high priority data maintains its reliability through separate handling or prioritized processing.
Solution Approach 2:
The patent introduces configurable parameters that allow the network to control whether low priority transmissions are dropped or multiplexed. By changing these parameters dynamically, the system can optimize throughput for low priority transmissions when network conditions permit, while still ensuring high priority reliability is maintained through appropriate resource allocation and processing priorities.
3Productivity
If multiplexing of high and low priority UCI onto shared channels is implemented, then spectral efficiency is improved, but complexity of resource management increases
Solution Approach 1:
The patent introduces an intermediary configuration mechanism where the network provides explicit RRC signaling to the UE regarding multiplexing behavior. This intermediary layer simplifies the UE's decision-making process by providing clear configuration rules, reducing the complexity of resource management at the UE while enabling sophisticated multiplexing strategies that improve spectral efficiency.
Solution Approach 2:
The patent segments the resource management complexity by separating the decision-making logic into network-configured parameters and UE-executed actions. The network handles the complex optimization aspects through configuration, while the UE follows straightforward rules based on its configuration, dividing the overall complexity between network and device.
4Adaptability or versatility
If flexible resource management is implemented for multiplexing high and low priority transmissions, then adaptability is improved, but device complexity increases
Solution Approach 1:
The network acts as an intermediary that provides flexible configuration through RRC signaling, enabling adaptability without burdening the UE with complex decision logic. The UE simply follows the configured rules, allowing the network to maintain flexibility while the device maintains simplicity.
Solution Approach 2:
The system achieves flexibility dynamically through network reconfiguration rather than complex UE-side decision-making. The network can adapt resource allocation, multiplexing behavior, and priority handling in real-time through signaling, providing adaptability while keeping UE processing relatively simple and rule-based.
Data Source
AI summary
Various embodiments herein provide techniques for handling overlap of uplink (UL) channels (e.g., UL control channels and/or UL data channels), such as prioritizing and/or multiplexing uplink channels. In some embodiments, the overlapped channels may have different priorities. Other embodiments may be described and claimed.