Uplink Multiplexing Schedule for PUSCH Collision Avoidance
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Solution Overview
Problem
In wireless communications, overlapping uplink resources scheduled by downlink control information can cause collisions between uplink data messages and uplink control signaling, reducing the reliability of data transmission from user equipment (UE) to base stations.
Innovation Solution
The UE determines a multiplexing schedule to multiplex scheduled physical uplink shared channel (PUSCH) resources with preconfigured or reserved uplink resources, either by dropping overlapping resources, applying a frequency shift, or using alternate resources, to minimize collisions and improve transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If downlink control information schedules multiple uplink resources for uplink data messages, then the uplink data transmission capacity is improved, but collisions with reserved uplink control signaling resources occur, reducing transmission reliability
Solution Approach 1:
The UE segments the multiple scheduled PUSCH resources and selectively transmits only those that do not overlap with reserved uplink control signaling resources. This segmentation approach allows the system to maintain high data transmission capacity by utilizing multiple resources while ensuring reliability by excluding conflicting resources from transmission.
Solution Approach 2:
Instead of allowing all scheduled resources to be transmitted and then resolving collisions, the invention inverts the approach by first identifying and excluding overlapping resources before transmission. The UE determines which scheduled PUSCH resources conflict with reserved control signaling and refrains from transmitting on those specific resources, thereby preventing collisions before they occur.
2Productivity
If the UE transmits on all scheduled PUSCH resources, then data transmission efficiency is maximized, but collisions with uplink control signaling increase
Solution Approach 1:
The invention converts the potentially harmful effect of resource overlap into a beneficial filtering mechanism. By identifying overlapping resources between scheduled PUSCH and reserved control signaling, the system benefits from this knowledge to make informed transmission decisions, excluding only the conflicting resources while maintaining transmission on all non-conflicting scheduled resources.
3Reliability
If the UE determines a multiplexing schedule to avoid collisions, then transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The UE performs self-service by autonomously determining the multiplexing schedule and identifying overlapping resources between scheduled PUSCH and reserved control signaling without requiring additional network signaling. The UE independently makes transmission decisions based on the scheduled resources and known reserved resources, eliminating the need for extra signaling overhead to coordinate collision avoidance.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive downlink control information (DCI) scheduling multiple physical uplink shared channel (PUSCH) resources for a set of uplink data messages. In some examples, the scheduled PUSCH resources may overlap with reserved or preconfigured uplink resources. The UE may determine, in accordance with a multiplexing configuration, a multiplexing schedule for multiplexing the scheduled PUSCH resources with the reserved or preconfigured uplink resources. The UE may transmit the set of uplink data messages on one or more of the scheduled PUSCH resources based on the multiplexing schedule. The described techniques may enable the UE to transmit the set of uplink data messages with improved reliability based on reducing a number of collisions between the set of uplink data messages and other uplink signals transmitted on the reserved or preconfigured uplink resources.