CSI Report Priority Selection for PUCCH Payload Limits
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Solution Overview
Problem
In wireless communication systems, the periodic CSI reporting process often results in payload size limitations, leading to dropped CSI reports when multiple reports exceed the maximum payload size of the PUCCH, causing inefficiencies in channel state information transmission.
Innovation Solution
An apparatus and method that determine a priority for each CSI report based on its type, serving cell, and CSI process ID, allowing for selective transmission of reports in a subframe, ensuring that higher-priority reports are sent efficiently using the appropriate channel, even if lower-priority reports are dropped.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple periodic CSI reports are transmitted in a subframe using PUCCH, then the quantity of CSI information transmitted is improved, but the payload size exceeds the maximum payload size of PUCCH causing reports to be dropped
Solution Approach 1:
The patent segments the transmission of multiple CSI reports by introducing priority levels and selective transmission mechanisms. When the total payload size exceeds PUCCH capacity, the system segments which reports to transmit based on priority, ensuring critical reports are delivered while lower-priority reports are dropped or deferred to other channels like PUSCH.
2Reliability
If periodic CSI reports are transmitted with high priority, then the reliability of critical information is improved, but the payload size limitation causes lower-priority reports to be dropped
Solution Approach 1:
The patent changes the parameter of transmission channel by introducing flexible channel selection between PUCCH and PUSCH. Based on payload size, priority configuration, and channel conditions, the system dynamically changes which channel is used for transmitting CSI reports, allowing lower-priority reports to be transmitted on alternative channels when PUCCH capacity is exceeded.
3Device complexity
If a single PUCCH is used for CSI transmission, then the device complexity is reduced, but the adaptability to handle multiple CSI reports with different priorities is worsened
Solution Approach 1:
The patent makes the transmission system universal by enabling both PUCCH and PUSCH to serve CSI reporting functions. The system can adaptively select between these channels based on requirements, making the overall transmission mechanism versatile enough to handle various CSI reporting scenarios including multiple priorities, different payload sizes, and varying channel conditions without requiring separate dedicated channels for each case.
Data Source
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AI summary
Apparatuses, methods, and systems are disclosed for CSI reporting. One apparatus includes a processor that determines a priority for each channel state information ("CSI") report of multiple CSI reports. In certain embodiments, the priority for each CSI report is determined based on each of a CSI report type, a serving cell, a CSI process identification ("ID"), and a CSI subframe set of the CSI report. In various embodiments, the processor determines one or more CSI reports of the multiple CSI reports to be transmitted in a subframe based at least partly on the priority for each CSI report. In certain embodiments, the processor selects a channel for transmitting the one or more CSI reports in the subframe. In various embodiments, the apparatus includes a transmitter that transmits the one or more CSI reports using the selected channel in the subframe.