CSI Reporting Rate Management for Wireless Uplink Congestion
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Solution Overview
Problem
In wireless communication systems, a high CSI reporting rate can lead to uplink congestion due to limited resources, degrading service quality and limiting the number of users served by a base station.
Innovation Solution
Dynamically adjusting the CSI reporting rate based on the Quality of Service (QoS) level of bearers established for user equipment (UEs), with higher QoS levels corresponding to higher reporting rates and lower QoS levels corresponding to lower reporting rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a high CSI reporting rate is used, then channel quality information accuracy is improved, but uplink congestion increases
Solution Approach 1:
The patent dynamically adjusts the CSI reporting rate based on QoS requirements and channel conditions. The base station determines an appropriate reporting rate from multiple candidate rates according to the QoS level of the bearer and current channel state, making the reporting rate flexible rather than fixed, thus resolving the contradiction between maintaining high accuracy and avoiding uplink congestion
Solution Approach 2:
The patent changes the CSI reporting rate parameter according to different QoS levels and channel conditions. By selecting from multiple candidate reporting rates (e.g., different periodicities), the system adapts the reporting frequency to match the actual service requirements, reducing unnecessary reporting for low QoS services while maintaining high reporting rates for high QoS services
2Manufacturing precision
If a high CSI reporting rate is used, then resource allocation accuracy is improved, but the number of served users decreases
Solution Approach 1:
The patent applies different CSI reporting rates to different users or different bearers based on their specific QoS requirements. High QoS bearers receive higher reporting rates for accurate resource allocation, while low QoS bearers use lower reporting rates, allowing the base station to serve more users simultaneously with appropriate resource allocation accuracy for each
Solution Approach 2:
The system dynamically selects the CSI reporting rate based on the QoS level and channel conditions for each user. This dynamic adjustment allows the base station to optimize resource allocation accuracy for users who need it while reducing reporting overhead for others, thereby increasing the total number of users that can be served
3Reliability
If a high CSI reporting rate is used, then modulation and coding scheme optimization is improved, but uplink signaling overhead increases
Solution Approach 1:
The patent changes the CSI reporting rate parameter according to QoS levels and channel conditions. For high QoS services requiring reliable MCS optimization, higher reporting rates are selected. For low QoS services, lower reporting rates reduce signaling overhead while maintaining adequate performance
Data Source
AI summary
According to aspects of the disclosure, a method and system are provided for managing signaling in a wireless communication network. In some aspects, a base station serves a user equipment device (UE) over an air interface connection between the base station and the UE, and a bearer extends between the UE and a gateway. An example method may involve determining a quality of service (QoS) level of the bearer, and responsively selecting a channel state information (CSI) reporting rate based on the determined QoS level. Further, in some aspects, responsive to the selection of the CSI reporting rate, the method may involve causing the UE to periodically report CSI to the base station according to the selected CSI reporting rate. The method may be performed, in whole or in part, by the UE, the base station, and/or another entity in the wireless communication system.