Dual-Mode Wireless Handover Coordination via PCF and DCF Switching
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Solution Overview
Problem
Existing dual-mode communication systems face challenges in facilitating seamless handovers between Wi-Fi and Wi-Max networks due to differences in handover standards and procedures, as well as mutual signal interference between networks operating on different frequency bands.
Innovation Solution
A method and system for wireless communication that initiates a second wireless connection between a client device and a second connection point, using messages to instruct the first connection point to communicate using either Point Coordinate Function (PCF) or Distributed Coordinate Function (DCF), and schedules transmission and reception to reduce signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a client device maintains connections to both Wi-Fi and Wi-Max networks simultaneously, then handover continuity is improved, but signal interference between networks increases
Solution Approach 1:
The system preemptively suspends the first wireless connection (Wi-Fi) before establishing the second wireless connection (Wi-Max). This preliminary action prevents simultaneous operation of both connections, thereby eliminating signal interference while ensuring continuous communication through seamless handover.
2Adaptability or versatility
If different coordination functions (PCF/DCF) are used for Wi-Fi and Wi-Max networks, then network compatibility is improved, but system complexity increases
Solution Approach 1:
The system employs a coordination function selector as an intermediary component that determines whether to use PCF or DCF based on the specific network type. This selector abstracts the complexity of multiple coordination functions, allowing the system to support both Wi-Fi and Wi-Max networks with different requirements while maintaining manageable system complexity through centralized decision-making.
Data Source
AI summary
A method for wireless communication determines, for a client device having a first wireless connection with a first connection point, to initiate a second wireless connection between the client device and a second connection point, wherein the first connection point includes an Access Point and the second connection point includes a Base Station. The method sends a message from the second connection point to the first connection point, including instructions for the first connection point to communicate with the client device using either a Point Coordinate Function (PCF) or a Distributed Coordinate Function (DCF). In addition, the method initiates the second wireless connection between the client device and the second communication point.