Selective Location-Based CQI Reporting for Stable Cellular Channels
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Solution Overview
Problem
Conventional CQI reporting in cellular networks consumes excessive resources and degrades UE performance in locations with poor channel quality due to constant updates, even when channel conditions are stable.
Innovation Solution
Implement a system where UEs are toggled between active and inactive CQI reporting modes based on their physical location, using a mapping database to store location-mapped CQI entries and update scores only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant CQI reporting is implemented to keep base stations maximally updated with channel state information, then resource scheduling performance is improved, but channel resources are consumed excessively and UE throughput is degraded
Solution Approach 1:
The patent applies dynamics by transitioning from static constant CQI reporting to dynamic conditional reporting. The base station dynamically adjusts the reporting requirement based on real-time location monitoring and comparison with stored location-mapped CQI entries. When the UE's current location matches a stored location with valid CQI data, reporting is deactivated; when locations differ or CQI data is stale, reporting is activated. This dynamic adjustment resolves the contradiction by maintaining scheduling performance only when needed while conserving resources when conditions are stable.
Solution Approach 2:
The patent changes the parameter of CQI reporting frequency from constant to variable based on location conditions. By monitoring location parameters and comparing them against stored location-mapped CQI entries, the system adjusts the reporting state (active/inactive) accordingly. This parameter change allows the system to maintain reliable channel state information when locations change while reducing resource consumption when locations remain stable, directly addressing the technical contradiction.
2Reliability
If constant CQI reporting is implemented to ensure updated channel state information, then base station scheduling decisions are improved, but UE throughput is degraded due to throughput consumption
Solution Approach 1:
The system dynamically adjusts CQI reporting based on location changes rather than maintaining constant reporting. By monitoring whether the UE's current location matches stored location-mapped CQI entries, the base station activates reporting only when necessary (location change detected) and deactivates it when conditions are stable. This dynamic approach maintains channel state information accuracy when needed while minimizing throughput consumption, resolving the contradiction between reliability and productivity.
Solution Approach 2:
The patent extracts the essential function of CQI reporting (providing updated channel state information) and separates it from the continuous reporting process. Instead of continuously reporting, the system extracts and transmits CQI information only when location changes occur or stored CQI data becomes stale. This extraction approach maintains the necessary channel state information accuracy while eliminating unnecessary reporting overhead that would degrade UE throughput.
3Loss of energy
If location-based selective CQI reporting is implemented, then channel resources are conserved and UE performance is improved, but system complexity increases due to location monitoring and database requirements
Solution Approach 1:
The patent applies universality by making the base station's location monitoring and storage system serve multiple functions: (1) tracking UE locations for CQI reporting decisions, (2) storing location-mapped CQI entries for comparison, (3) determining when reporting should be activated or deactivated, and (4) maintaining channel state information history. By consolidating these functions into existing base station components, the system reduces the need for separate dedicated systems while achieving location-based selective reporting that conserves channel resources.
Data Source
AI summary
Techniques are described for reducing channel quality indication (CQI) reporting by user equipment (UEs) by selectively triggering the UEs to report CQI based at least on present physical location. UEs are controllable by base stations to toggle between active and inactive CQI reporting modes (inactive being the default mode). By default, base stations can make channel-state-based determinations based on previously reported CQI information stored as location-mapped CQI entries. Base stations can monitor the physical locations of UEs to determine when they are in locations with stale location-mapped CQI entries. If a UE is detected as being in such a location, a base station can direct the UE to toggle into active CQI reporting mode, thereby causing the UE to compute its CQI and transmit a CQI report. The base station can use the reported information to update the CQI score of the location-mapped CQI entry for that location.