Uplink Resource Selection for SP-CSI and Transport Block Overlap
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Solution Overview
Problem
In wireless communications, managing uplink resources becomes challenging when there is an overlap between semi-persistent channel state information (SP-CSI) resource grants and other uplink resource grants, such as dynamic grants, and the wireless device is configured not to transmit both resources in parallel.
Innovation Solution
A wireless device determines which resource to use in case of an overlap by dropping the scheduled transmission of an SP-CSI report and transmitting the transport block of data instead, based on selection criteria such as data size, periodicity, type, and priority.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless device transmits both SP-CSI report and transport block simultaneously, then channel state information feedback and data transmission can occur in parallel, but the device is configured not to transmit both resources in parallel causing resource conflict
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission parameters based on resource overlap detection. When an SP-CSI report grant overlaps with a dynamic grant for transport block, the device changes the transmission parameter from simultaneous transmission to selective transmission based on priority rules. The MAC entity compares resource parameters (time, frequency, priority levels) and modifies transmission behavior accordingly, dropping lower-priority transmissions to resolve the resource conflict while maintaining efficient use of uplink resources.
2Reliability
If the wireless device drops the SP-CSI report transmission, then the transport block can be transmitted without resource conflict, but the channel state information feedback is lost
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of a priority-based selection rule that mediates between conflicting transmission requirements. The MAC entity acts as an intermediary that evaluates both the SP-CSI report and transport block grants, comparing their respective priorities and resource allocations. When overlap is detected, the intermediary rule determines which transmission should proceed based on pre-configured priority levels, ensuring that high-priority data transmissions are not blocked by lower-priority CSI reports while maintaining systematic resource management.
3Productivity
If the wireless device prioritizes transport block over SP-CSI report during resource overlap, then data transmission is ensured, but the periodicity and timing of channel state information feedback may be affected
Solution Approach 1:
The patent applies dynamics by making the transmission schedule adaptive rather than fixed. While SP-CSI reports have configured periodicity, the system dynamically adjusts actual transmission timing based on real-time resource availability and overlap conditions. When a dynamic grant overlaps with an scheduled SP-CSI report, the system dynamically cancels the CSI transmission in favor of the data transmission, then reschedules or skips the CSI report based on priority rules. This dynamic approach allows the system to maintain data transmission efficiency while accommodating periodic CSI requirements through flexible timing adjustments.
Data Source
AI summary
Uplink resources for semi-persistent channel state information (SP-CSI) reports and other uplink transport block transmissions may be managed. If resources allocated to the SP-CSI reports overlap, in time, with resources allocated to the uplink transport block transmissions, a determination of whether to drop an SP-CSI report may be made. Various selection criteria may be used to make this determination.