Background Scanning Processor for OFDMA Mobile Stations
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Solution Overview
Problem
Current wireless communication systems, such as those under the IEEE 802.16 standard, require mobile stations to stop data transmission and reception to scan neighboring base stations for handover, leading to a trade-off between handover performance and data throughput.
Innovation Solution
Implementing a background scanning process that buffers and decodes raw signal data from multiple base stations using a separate background scanning processor, allowing continuous data exchange with the serving base station without interrupting data transmission or reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mobile station stops data transmission and reception to scan neighboring base stations, then handover performance is improved, but data throughput is reduced
Solution Approach 1:
The patent divides the baseband processing function into two separate processors: a receive baseband processor that handles data transmission/reception with the serving base station, and a background scanning processor that independently performs neighbor base station scanning. This segmentation allows both handover monitoring and data communication to occur simultaneously without mutual interference, resolving the contradiction between handover performance and data throughput
Solution Approach 2:
The background scanning processor acts as an intermediary component that enables continuous neighbor base station scanning by processing buffered raw signal data independently from the main data communication path. This intermediary processor ensures handover readiness is maintained while data throughput remains uninterrupted
2Reliability
If a mobile station scans neighboring base stations frequently, then handover performance is improved, but data transmission is interrupted
Solution Approach 1:
The system performs preliminary buffering of raw signal data before scanning operations. The background scanning processor retrieves and processes previously buffered data from multiple base stations to generate channel characteristics, enabling frequent scanning without requiring real-time data transmission interruptions. This preliminary data preparation allows continuous data exchange while maintaining scanning capability
Solution Approach 2:
The patent implements continuous background scanning by having the background scanning processor continuously generate channel characteristics for neighboring base stations using buffered data, while the receive baseband processor continuously handles data transmission with the serving base station. Both useful actions proceed simultaneously and continuously without interruption
Data Source
AI summary
Certain embodiments provide techniques for background scanning in a wireless communication device receiving signals from multiple base stations using a background scanning processor separate from a receive processor. The techniques generally include buffering raw signal data from multiple base stations, forwarding the raw signal data to a receive baseband processor for decoding data from a first one of the base stations that is currently designated as a serving base station with an active connection to the wireless communications device, forwarding the raw signal data to a background scanning processor, separate from the receive baseband processor, and generating channel characteristics corresponding to the multiple base stations with the background scanning processor without interrupting the exchange of data with the first base station designated as the serving base station.