Configured Uplink Grants for Low Priority Data Transmission
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Solution Overview
Problem
In wireless communication networks, user equipment (UE) faces challenges in efficiently transmitting low priority data using configured uplink grants, often resulting in unnecessary power consumption and potential call drops due to frequent wake-ups for scheduling requests or buffer status reports.
Innovation Solution
The UE is configured to manage uplink resources by receiving pre-scheduled uplink grants, determining the availability of remaining resources, and transmitting low priority data accordingly, either in whole or in portions, within the allocated grants to avoid additional wake-ups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits low priority data using scheduled resources (SR/BSR), then the data can be transmitted reliably, but the UE experiences frequent wake-ups and increased power consumption
Solution Approach 1:
The network pre-allocates uplink resources and provides configured grants to the UE in advance, allowing the UE to transmit low priority data without needing to wake up for scheduling requests. This preliminary resource allocation eliminates the need for frequent wake-ups while ensuring data transmission capability is available when needed.
Solution Approach 2:
The UE is configured with autonomous uplink resources that it can use independently without network scheduling intervention. The configured grants enable the UE to self-service its low priority data transmission needs by directly using pre-configured resources, avoiding the power-consuming SR/BSR wake-up cycle.
2Use of energy by moving object
If the UE waits for periodic resource allocations, then power consumption is reduced, but data transmission delay increases
Solution Approach 1:
The network performs preliminary resource allocation by configuring grants in advance, creating a hybrid approach where resources are pre-allocated but activated on-demand. This allows the UE to have immediate access to uplink resources when data arrives, eliminating waiting delays while maintaining power efficiency through selective usage.
Solution Approach 2:
The configured grant mechanism dynamically adapts resource availability to actual data transmission needs. Rather than fixed periodic allocations or continuous monitoring, the system provides flexible access where resources are available immediately when needed but only consumed when data requires transmission, optimizing both timing and energy usage.
3Use of energy by moving object
If the UE uses configured uplink grants for low priority data, then power consumption is reduced, but resource allocation complexity increases
Solution Approach 1:
The configured grant mechanism serves multiple functions simultaneously: it provides power-saving benefits by avoiding frequent wake-ups, ensures timely data transmission through pre-allocated resources, and maintains compatibility with existing NR uplink frameworks. This multi-functionality justifies the moderate increase in complexity by delivering comprehensive performance improvements.
Solution Approach 2:
The configured grant acts as an intermediary mechanism between full periodic scheduling and completely autonomous transmission. It mediates the trade-off by providing a middle ground where resources are pre-configured but usage is controlled by simple buffer status checks, adding manageable complexity while achieving significant power savings and timing improvements.
Data Source
AI summary
Disclosed are methods, systems, and computer-readable media to perform operations including: receiving an uplink grant associated with pre-scheduling from a base station; in response to the uplink grant, transmitting first data having a first priority to the base station; determining whether there is a remaining uplink resource associated with the uplink grant; and in response to determining that there is the remaining uplink resource, transmitting second data having a second priority to the base station using the remaining uplink resource, wherein the second priority is lower than the first priority.