LCIB Carrier Prioritization in Frequency-Hopping Pilot Beacons
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Solution Overview
Problem
Low-Cost Internet Base Stations (LCIBs) face limitations in effectively advertising their presence to mobile stations due to the need to cycle through multiple macro-network carriers in their pilot beacons, potentially missing carriers and reducing coverage awareness for mobile stations operating on those carriers.
Innovation Solution
LCIBs prioritize carriers based on the selection preferences of associated mobile stations by identifying and prioritizing carriers that these mobile stations would self-select, ensuring inclusion in the frequency-hopping pilot beacon, thereby enhancing coverage awareness and service availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If LCIBs cycle through multiple macro-network carriers in pilot beacons, then coverage area is expanded, but carrier visibility for specific mobile stations is reduced
Solution Approach 1:
The patent applies local quality by customizing the pilot beacon content for different mobile stations based on their carrier preferences. Each mobile station receives a tailored pilot beacon that prioritizes its preferred carriers, rather than a uniform beacon for all stations. This resolves the contradiction by making the beacon information locally optimized for each station's needs while maintaining broad coverage through frequency hopping.
Solution Approach 2:
The system performs preliminary action by having mobile stations pre-indicate their carrier preferences before the pilot beacon is constructed. The LCIB uses these advance preferences to prioritize carriers in the pilot beacon, ensuring that when the beacon is transmitted, it already contains the optimized carrier information that each mobile station needs, eliminating the need for retransmissions or additional signaling.
2Loss of information
If LCIBs include all carriers in pilot beacons, then complete information is provided, but beacon transmission time is excessive
Solution Approach 1:
The patent extracts only the necessary carrier information from the complete carrier list and includes only those carriers that are relevant to specific mobile stations in the pilot beacon. By extracting and including only the prioritized carriers based on mobile station preferences, the system provides complete information for each station without the overhead of including all possible carriers, thus reducing beacon transmission time while maintaining information completeness for each recipient.
3Adaptability or versatility
If LCIBs use frequency-hopping pilot beacons, then carrier diversity is increased, but service reliability for specific carriers is reduced
Solution Approach 1:
The patent applies local quality by prioritizing specific carriers in the frequency-hopping sequence based on mobile station preferences and service reliability requirements. Carriers that provide more reliable service are placed earlier in the hopping sequence or given higher priority, ensuring that mobile stations first attempt to connect to the most reliable carriers while still maintaining the ability to hop to other carriers for diversity.
4Reliability
If LCIBs prioritize carriers based on mobile station preferences, then service quality is improved, but system complexity increases
Solution Approach 1:
The system performs preliminary action by having mobile stations pre-indicate their carrier preferences through uplink signaling before the pilot beacon is constructed. The LCIB uses these advance preferences to prioritize carriers in the pilot beacon, ensuring that when the beacon is transmitted, it already contains the optimized carrier information that each mobile station needs, eliminating the need for retransmissions or additional signaling.
Data Source
AI summary
Methods and systems are provided for prioritizing carriers in low-cost Internet-base-station-(LCIB) frequency-hopping pilot beacons. In one embodiment, an LCIB provides a frequency-hopping pilot beacon that repeatedly cycles through transmitting pilot-beacon information on each of multiple carriers. The LCIB identifies a first list of mobile stations, as well as a first list of carriers. The LCIB uses the first list of mobile stations to identify a second list of carriers from among the first list of carriers, thereby identifying a third list of carriers consisting of any carriers that are in the first list of carriers but not in the second list of carriers. The LCIB then prioritizes the second list of carriers over the third list of carriers for inclusion in the frequency-hopping pilot beacon.