Uplink Transmission Interruption for Wireless Collision Handling
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Solution Overview
Problem
In wireless communication systems, collisions between high priority and low priority uplink transmissions can lead to inefficiencies and increased complexity, as existing methods often require synchronized cancellation of low priority transmissions with high priority ones, resulting in prolonged utilization of network resources.
Innovation Solution
A method where user equipment identifies collisions between high priority and low priority uplink transmissions and cancels the low priority transmissions during a defined time period, with an end point before the first overlapping symbol of the high priority transmission, based on processing time and offset, and a start point tied to a triggering event or UE capability, allowing for early interruption and reduced resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If synchronized cancellation of low priority transmissions with high priority ones is used, then network resource utilization is reduced, but UE complexity and processing overhead increase
Solution Approach 1:
The patent applies preliminary action by determining a cancellation time that is earlier than the original transmission time of the low priority uplink transmission. The UE identifies a collision between high and low priority transmissions, then proactively cancels the low priority transmission before it would have occurred, based on a calculated cancellation time that accounts for processing time and offset values. This preliminary cancellation avoids the need for complex synchronized cancellation mechanisms while still achieving network resource optimization.
2Device complexity
If early interruption of low priority transmissions is implemented, then UE complexity is reduced, but synchronization with base station may be affected
Solution Approach 1:
The patent implements feedback by having the base station send downlink control information (DCI) that indicates the cancellation of the low priority uplink transmission. The UE receives this feedback, determines the cancellation time based on the DCI and its processing capability, and executes the cancellation. This feedback mechanism ensures that the UE's early interruption decision is coordinated with the base station, maintaining synchronization while reducing UE complexity compared to autonomous collision detection and resolution.
3Loss of energy
If processing time and offset are used to determine cancellation time, then network resource utilization is optimized, but the defined time period for cancellation becomes more complex
Solution Approach 1:
The patent applies parameter changes by using configurable offset values and processing time parameters to determine the cancellation time. The offset parameter allows flexibility in setting the cancellation time relative to the DCI reception time, while the processing time parameter accounts for UE-specific capabilities. These parameter changes enable the system to optimize network resource utilization by precisely controlling when cancellations occur, while the configurability keeps the implementation manageable through standardized parameter sets rather than complex real-time calculations.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify a collision between a first uplink transmission and a second uplink transmission, wherein the first uplink transmission is a high priority uplink transmission and the second uplink transmission is a low priority uplink transmission; and cancel the second uplink transmission during a defined time period, wherein the defined time period has an end point based at least in part on a processing time and an offset, and a start point based at least in part on a triggering event for the first uplink transmission or a UE capability. Numerous other aspects are provided.