Inter-Technology Handoff Using Pilot Signals
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Solution Overview
Problem
Existing wireless communication systems experience disruptions during inter-technology handoffs due to latency caused by mobile devices ceasing communication on one technology before switching to another, as they need to search for and connect to the new technology.
Innovation Solution
The system transmits a pilot signal on a secondary bandwidth to indicate the availability of a first technology, allowing mobile devices to switch back to the first technology without discontinuing communication with the secondary technology, thereby minimizing latency during handoffs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mobile device ceases communication on the first technology to search for and connect to the second technology, then the handoff can be completed, but latency and disruptions occur during the transition
Solution Approach 1:
The system transmits pilot signals on the second bandwidth before the handoff is actually needed, allowing the mobile device to detect and evaluate the second technology in advance. This preliminary detection eliminates the need to search for the second technology after stopping communication on the first technology, thereby reducing handoff latency while ensuring reliable connection switching
2Loss of time
If the mobile device continues communicating on the second technology while detecting the first technology, then latency is reduced, but the complexity of managing multiple technology connections increases
Solution Approach 1:
Pilot signals serve as intermediaries that carry information about the availability and quality of the first technology on the second bandwidth. The mobile device uses these pilot signals to detect and evaluate the first technology without needing to establish full communication channels, thereby reducing the complexity of managing multiple technology connections while enabling seamless handoffs
Data Source
AI summary
Systems and methodologies are described that facilitate effectuating inter-technology handoffs utilizing pilots. A sector can utilize a first technology to communicate on a first bandwidth. Further, to indicate presence of the first technology, the sector can transmit a pilot on a second bandwidth (e.g., where the second bandwidth can be utilized with a second technology). While a mobile device is communicating data utilizing the second technology upon the second bandwidth, the pilot related to the first technology can be obtained. Based upon the pilot, communication of data (e.g., received and/or transmitted by the mobile device) can be switched to using the first technology on the first bandwidth. Accordingly, the mobile device need not discontinue communicating data with the second technology prior to identifying availability of the first technology and/or initiating handoff to the first technology.