Multiple DCI Scheduling Before Uplink Resources for Channel Overlap
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently scheduling and managing downlink control information (DCI) to handle overlapping high and low priority physical uplink channels, leading to potential collisions and inefficiencies in resource utilization.
Innovation Solution
A method and apparatus for scheduling multiple DCI messages to arrive earlier than the start of physical uplink channel resources, with mechanisms to check for and manage overlaps between high and low priority channels, ensuring timely and efficient transmission or reception of uplink messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple DCI messages are scheduled to arrive earlier than the start of physical uplink channel resources, then resource utilization efficiency is improved, but processing time constraints are worsened
Solution Approach 1:
The patent schedules DCI messages to arrive at the UE before the start of physical uplink channel resources, providing advance notice of upcoming transmissions. This preliminary action allows the UE to prepare processing in advance, improving resource utilization efficiency while maintaining adequate processing time through proper timing configuration.
Solution Approach 2:
The patent introduces dynamic timing adjustments by configuring different time offsets between DCI message arrival and physical uplink channel start times. This dynamic approach allows the system to optimize the balance between early arrival benefits and processing time requirements based on specific transmission conditions and UE capabilities.
2Reliability
If high priority physical uplink channels are scheduled, then transmission reliability is improved, but channel overlap collisions are worsened
Solution Approach 1:
The patent segments uplink channels by priority levels (high priority and low priority) and applies different handling rules to each segment. High priority channels are protected from cancellation even when overlapping with low priority channels, ensuring transmission reliability while managing collisions through priority-based segmentation.
Solution Approach 2:
The patent applies different quality attributes to different channels based on their priority levels. High priority channels receive preferential treatment in terms of protection from cancellation and multiplexing rules, while low priority channels are more readily cancelled or multiplexed. This local quality differentiation resolves the contradiction by protecting reliable transmissions while managing overlaps.
3Productivity
If low priority channels are cancelled due to overlap with high priority channels, then resource efficiency is improved, but information loss is worsened
Solution Approach 1:
The patent implements feedback mechanisms where the network entity receives acknowledgments from UEs about channel cancellation decisions. This feedback allows the network to adjust scheduling decisions and potentially retransmit cancelled low priority information, reducing information loss while maintaining resource efficiency through selective cancellation.
Solution Approach 2:
The patent allows for temporary discarding of low priority channel transmissions when overlaps occur, with the possibility of recovery through retransmission or alternative scheduling. This approach maintains resource efficiency by cancelling conflicting transmissions while recovering lost information through subsequent scheduling opportunities.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network entity may schedule multiple downlink control information (DCI) messages, which schedule multiple uplink messages to be transmitted by a user equipment (UE) on physical uplink channel resources, such that each of the multiple DCI messages arrive at least a specified time duration earlier than a start of an earliest of the physical uplink channel resources. The network entity may transmit the multiple DCI messages as scheduled. The UE may prepare to receive the DCI messages as scheduled. Numerous other aspects are described.