Wireless Device Channel State Reporting Rate Control
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Solution Overview
Problem
The high channel state reporting rate by wireless communication devices (WCDs) can lead to uplink congestion, preventing other signaling messages, such as scheduling requests, from being sent effectively in wireless networks.
Innovation Solution
Differentially setting the channel state reporting rate for WCDs based on their role as endpoint devices or intermediaries, with higher rates for devices providing connectivity to other devices and lower rates for those that do not, to manage air interface communication efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If WCDs report channel state at a high rate to ensure accurate channel state information for the base station, then measurement precision is improved, but uplink congestion occurs and other signaling messages cannot be sent effectively
Solution Approach 1:
The patent applies local quality by differentiating channel state reporting rates based on the specific role of each WCD. Endpoint devices use a first reporting rate while intermediary devices use a second reporting rate. This localized differentiation ensures that only devices whose channel state critically impacts system performance (intermediaries) report at higher rates, maintaining measurement precision where needed while avoiding uplink congestion from unnecessary high-rate reporting by endpoint devices.
Solution Approach 2:
The patent changes the reporting rate parameter based on device role characteristics. By dynamically adjusting the channel state reporting rate parameter - using a higher rate for intermediary devices and a lower rate for endpoint devices - the system optimizes the balance between obtaining accurate channel state information and preventing uplink congestion. This parameter adaptation resolves the contradiction by making reporting intensity contingent on actual system needs.
2Reliability
If a uniform high channel state reporting rate is applied to all WCDs to maintain accurate channel state information, then reliability of channel state data is improved, but productivity of the air interface decreases due to congestion
Solution Approach 1:
The patent implements local quality by applying different reporting rate policies to different device categories. Intermediary devices, whose channel state directly affects multiple connected devices, report at a higher rate to maintain reliability. Endpoint devices report at a lower rate since their channel state has limited impact on overall system reliability. This localized approach maintains necessary reliability while preserving air interface productivity.
Solution Approach 2:
The patent applies partial action by having only intermediary devices report channel state at the higher rate, rather than all devices. This partial high-rate reporting from strategically selected devices (intermediaries) provides sufficient reliability for system operation without the excessive uplink load that would result from universal high-rate reporting, thus maintaining productivity.
3Adaptability or versatility
If all WCDs report channel state frequently to ensure up-to-date information for modulation scheme selection, then adaptability of communication parameters is improved, but loss of time for other signaling operations increases
Solution Approach 1:
The patent applies local quality by differentiating reporting frequencies based on device role. Intermediary devices report channel state more frequently since their communication conditions directly impact multiple connected devices, requiring greater adaptability. Endpoint devices report less frequently, reducing time loss for other signaling operations while maintaining sufficient adaptability for their less critical communication needs.
Solution Approach 2:
The patent uses partial action by applying frequent reporting only to intermediary devices rather than all devices. This selective frequent reporting maintains necessary adaptability for system-critical devices while minimizing time loss for other signaling operations, resolving the contradiction between adaptability and time efficiency.
Data Source
AI summary
A method and system for managing channel state reporting rate for transmission of channel state reports from a wireless communication device (WCD) to its serving base station based. The channel state reports provide metrics regarding a wireless communication channel between the WCD and the base station, and the channel state reporting rate defines how often the WCD will transmit such reports. Per the disclosure, the channel state reporting rate could be set to a higher value (for more frequent channel state reporting) if the WCD provides such connectivity and a lower value (perhaps a default value) if not, and the reporting rate could be set higher as the WCD provides connectivity for a greater number of other devices.