Mobile Country Code Recognition for Cell Search Optimization
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Solution Overview
Problem
User equipment (UE) in mobile communications faces inefficiencies when powering on or recovering from an out-of-service state, as it must perform full-band frequency scans to find a suitable cell, consuming significant time and power, especially when unaware of its location, leading to unnecessary searches on unsupported frequency bands.
Innovation Solution
The UE measures received signal strength to determine the mobile country code (MCC), which allows it to prioritize and search only supported frequency bands, reducing the time and power consumption required to find a suitable cell by determining a frequency band search order based on the MCC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs full-band frequency scan to find a suitable cell, then the UE can ensure comprehensive cell search coverage, but the time consumption and power consumption increase significantly
Solution Approach 1:
The patent applies preliminary action by having the UE determine MCC information before performing the frequency band scan. The UE uses the determined MCC to pre-select supported frequency bands, so when cell search is needed, it can immediately scan only the relevant bands rather than performing a comprehensive full-band scan, thus reducing time while maintaining reliability
Solution Approach 2:
The patent applies local quality by making the frequency band scan targeted rather than uniform. Based on the determined MCC, the UE identifies which specific frequency bands are supported in that location and concentrates the scan effort only on those bands, rather than uniformly scanning all possible bands, thereby improving efficiency without compromising search coverage
2Reliability
If the UE performs full-band frequency scan to find a suitable cell, then the UE can ensure comprehensive cell search coverage, but the power consumption increases significantly
Solution Approach 1:
The patent applies preliminary action by having the UE determine MCC information before performing the frequency band scan. The UE uses the determined MCC to pre-select supported frequency bands, so when cell search is needed, it can immediately scan only the relevant bands rather than performing a comprehensive full-band scan, thus reducing power consumption while maintaining reliability
Solution Approach 2:
The patent applies local quality by making the frequency band scan targeted rather than uniform. Based on the determined MCC, the UE identifies which specific frequency bands are supported in that location and concentrates the scan effort only on those bands, rather than uniformly scanning all possible bands, thereby reducing power consumption without compromising search coverage
3Reliability
If the UE scans all frequency bands when location is unknown, then the UE can ensure no supported band is missed, but unnecessary time and power are spent on unsupported bands
Solution Approach 1:
The patent applies preliminary action by having the UE determine MCC information before performing the frequency band scan. This preliminary determination allows the UE to know which frequency bands are supported in the current location, eliminating the need to scan unsupported bands and thus avoiding wasted energy while ensuring all supported bands are covered
Solution Approach 2:
The patent applies local quality by making the frequency band scan targeted rather than uniform. Based on the determined MCC, the UE identifies which specific frequency bands are supported in that location and concentrates the scan effort only on those bands, thereby avoiding energy waste on unsupported bands while ensuring complete coverage of supported bands
Data Source
AI summary
Various solutions for mobile country code recognition with respect to user equipment in mobile communications are described. An apparatus may measure a received signal strength. The apparatus may determine a mobile country code (MCC) according to the received signal strength. The apparatus may determine a frequency band search order according to the determined MCC. The apparatus may search a suitable cell according to the frequency band search order. The apparatus may camp the suitable cell.