CSI Slot Offset Determination for Flexible UE Capability Matching
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Solution Overview
Problem
In the 5G mobile communication system, the determination of CSI reference resources is inflexible due to the use of constant values for T1 and T2, leading to mismatched CSI computation capabilities between the UE and the network device, resulting in inefficient CSI reporting.
Innovation Solution
A method for determining slot offsets based on the UE's actual CSI computation capabilities, including reporting types, computation times, and numerologies, allowing for flexible configuration of CSI requests and improving feedback efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If constant values of four slots are used for T1 and T2 in LTE system, then the determination of slot offset is simple, but the CSI reference resources configured by the network device for the UE may not match a capability of the UE itself for calculating the CSI
Solution Approach 1:
The patent applies the dynamics principle by making T1 and T2 configurable parameters rather than fixed constants. The network device can dynamically adjust the values of T1 and T2 based on UE capability information, allowing the slot offset determination to adapt to different UE computation capabilities while maintaining a relatively simple determination mechanism through standardized configuration procedures.
Solution Approach 2:
The patent implements parameter changes by allowing T1 and T2 to be configured with different values according to UE capability reports. Instead of using fixed four-slot values, the system enables flexible parameter adjustment where T1 and T2 can be set to appropriate values that match the specific UE's CSI computation capabilities, thus resolving the mismatch between network configuration and UE capability.
2Reliability
If flexible configuration of T1 and T2 is implemented based on UE capability, then the CSI reference resources match UE computation capability, but the configuration process becomes more complex
Solution Approach 1:
The patent applies preliminary action by having the UE report its capability information (including supported T1 and T2 values) before the network device configures the actual T1 and T2 parameters. This advance capability reporting allows the network device to make informed configuration decisions without complex real-time negotiation, ensuring reliable matching between CSI reference resources and UE capability while keeping the configuration process manageable.
Solution Approach 2:
The patent implements feedback mechanisms where the UE provides capability information to the network device, which then uses this feedback to appropriately configure T1 and T2 values. This feedback loop ensures that the configured parameters reliably match the UE's actual computation capabilities, resolving the contradiction between reliability and complexity by using structured information exchange rather than complex adaptive algorithms.
3Productivity
If constant slot offset values are used, then the configuration is simple, but CSI reports may be transmitted at inappropriate times causing resource waste or failures
Solution Approach 1:
The patent applies dynamics by enabling the slot offset values T1 and T2 to be adjusted according to UE capability, allowing CSI reports to be scheduled at appropriate times that account for the UE's computation requirements. This dynamic configuration prevents resource waste and transmission failures by ensuring that CSI reports are transmitted only when the UE has sufficient time to compute accurate channel state information, thereby improving productivity without requiring overly complex determination mechanisms.
Data Source
Figure 1~2B
Figure 3~5A
Figure 5B~6
AI summary
A slot offset determination method includes: receiving CSI report request information from a network device; determining a reference slot offset T in accordance with the CSI report request information; and determine a slot offset for a CSI reference resource in accordance with the reference slot offset T.