Location-Based Terrestrial Cell Frequency Measurements to Reduce UE Power
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Solution Overview
Problem
User Equipment (UE) consumes excessive power by unnecessarily searching for terrestrial network (TN) cell frequencies when located within non-terrestrial network (NTN) cells with no TN coverage due to higher priority assigned to TN frequencies, despite low signal strength.
Innovation Solution
The UE receives information from a network entity indicating TN cell frequencies and performs measurements only when within TN cell coverage, using location-based criteria to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs measurements of TN cell frequencies with higher priority assigned to TN frequencies, then the measurement reliability and network selection accuracy are improved, but the power consumption increases excessively due to unnecessary measurements outside TN cell coverage
Solution Approach 1:
The patent applies local quality by making the measurement behavior frequency-specific and location-specific. Instead of uniformly measuring all TN frequencies regardless of location, the UE selectively measures only those TN frequencies that are relevant to its current geographic location, as indicated by location information from GPS or cell positioning. This resolves the contradiction by maintaining measurement reliability for applicable frequencies while eliminating unnecessary measurements that consume power.
Solution Approach 2:
The patent implements partial action by performing measurements only when necessary - specifically, only when location information indicates the UE is within or near TN cell coverage areas. The UE selectively applies measurement actions based on partial evaluation of location data, avoiding excessive measurements in areas where TN cells are not present, thus reducing power consumption while maintaining measurement reliability where needed.
2Measurement precision
If the UE continuously searches for TN cell frequencies based on priority assignment, then the network selection accuracy is improved, but the battery life decreases due to unnecessary searches in areas with no TN coverage
Solution Approach 1:
The patent applies preliminary action by using location information (from GPS or cell positioning) to pre-determine whether TN cell measurements are likely to be useful before actually performing the measurements. The UE evaluates its current location against known or predicted TN cell coverage areas, and only initiates frequency measurements when the location suggests TN cells may be present. This preliminary assessment maintains network selection accuracy when appropriate while preserving battery life by avoiding futile searches in areas without TN coverage.
3Measurement precision
If the UE performs frequency measurements at high priority intervals, then the measurement precision and responsiveness are improved, but the power consumption increases due to frequent measurements in all locations
Solution Approach 1:
The patent implements dynamics by making the measurement interval adaptive rather than fixed. The UE dynamically adjusts its measurement behavior based on current location conditions - performing measurements at high priority intervals when location information indicates proximity to TN cell coverage areas, and reducing or suspending measurements when location data suggests the UE is in areas without TN coverage. This dynamic adjustment maintains measurement responsiveness when needed while significantly reducing power consumption during travel through areas where TN cells are not present.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network entity and via a system information block (SIB), information that indicates frequencies associated with a terrestrial network (TN) cell. The information may include one or more of a priority of frequency, frequency-specific offset, or cell-specific offset. The UE may perform, during an idle mode of the UE, measurements of the frequencies associated with the TN cell based at least in part on a location of the UE being within the TN cell. Numerous other aspects are described.