CSI Reporting Latency Bounds for Multi-Carrier Channel Feedback
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Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing channel state information (CSI) reporting latency, which affects the efficiency and reliability of data transmission in mobile networks.
Innovation Solution
Implementing mechanisms to manage and optimize CSI reporting latency by configuring wireless devices and base stations to adapt transmission parameters based on traffic load, packet sizes, and traffic characteristics, using advanced protocols and adaptive algorithms to minimize latency and enhance data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CSI reporting is performed frequently to improve channel state accuracy, then measurement precision is improved, but reporting latency increases and transmission efficiency deteriorates
Solution Approach 1:
The patent implements dynamic CSI reporting where the reporting frequency and latency bound are adjusted based on current channel conditions and traffic requirements. The network configures different latency bounds for different reporting instances, allowing the system to switch between frequent reporting (for accuracy) and less frequent reporting (for lower latency) depending on operational needs.
Solution Approach 2:
The patent changes the timing parameters of CSI reporting by configuring specific latency bounds (e.g., k1 values) that determine when reports are transmitted. By adjusting these temporal parameters, the system optimizes the balance between reporting frequency (affecting accuracy) and reporting delay (affecting latency).
2Productivity
If adaptive algorithms are implemented to optimize transmission parameters, then data transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where CSI reports are transmitted from the wireless device to the network based on configured latency bounds. The network uses this feedback to adaptively adjust transmission parameters such as modulation and coding scheme, resource allocation, and future CSI reporting configurations, thereby optimizing data transmission efficiency.
Solution Approach 2:
The wireless device autonomously measures channel state and generates CSI reports according to configured parameters without requiring continuous network control. This self-service approach allows the device to adapt to channel changes independently, improving transmission efficiency while reducing the signaling overhead and complexity of centralized control.
Data Source
AI summary
A first wireless device transmits, to a second wireless device RRC messages comprising a field indicating a time duration associated with a latency bound for reporting a CSI of a first carrier and a second carrier. An expiration of the time duration is associated with a cancellation of reporting of the CSI and the latency bound is associated with one or more resource pools of each carrier. The first device transmits, to the second wireless device and via the first carrier, a first SCI requesting a first CSI of the first carrier, and receives, from the second wireless device, a first MAC CE comprising the first CSI of the first carrier before expiration of the time duration after the transmitting the first SCI. The first device transmits, to the second wireless device and via the second carrier, a second SCI requesting the second CSI of the second carrier, and receives, from the second wireless device, a second MAC CE comprising the second CSI of the second carrier before expiration of the time duration after the transmitting the second SCI.