Bidirectional Handover Request Mechanism in Wireless PBSS Networks
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Solution Overview
Problem
Current wireless communication systems, particularly in personal basic service sets (PBSS), lack efficient mechanisms for handover between devices, limiting flexibility and operational efficiency, as handover requests are typically initiated by coordinators and not stations, and reasons for handover are not adequately considered.
Innovation Solution
A method and apparatus for performing handover between a first device and a second device in a PBSS, allowing a station to request a handover with a PBSS control point (PCP) or vice versa, with handover request and response frames containing information about the reason for the request, enabling selective handover based on acceptance or rejection criteria such as power levels, communication link quality, and service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If handover requests are initiated only by coordinators, then the handover process is simple and controlled, but system flexibility and operational efficiency are limited
Solution Approach 1:
The patent inverts the traditional handover initiation model by allowing stations to request handover to the PCP, not just the other way around. This bidirectional handover initiation capability enhances system flexibility while maintaining manageable complexity through structured request-response framing.
Solution Approach 2:
The handover mechanism is designed to be universal, allowing either the coordinator or any station to initiate handover based on system needs. The standardized handover request frame structure enables multi-functional use cases including coordinator handover, station-initiated handover for service requirements, and power-level-based handover.
2Productivity
If handover requests do not include reason information, then the handover process is faster and simpler, but handover decisions cannot be optimized based on actual needs
Solution Approach 1:
The handover request frame includes preliminary reason information that is gathered and prepared before the actual handover decision is made. This allows the receiving device to evaluate the handover request with full context about power levels, service requirements, and communication link quality, enabling optimized decisions without delaying the handover process.
3Ease of operation
If stations cannot initiate handover requests, then the network structure remains simple and stable, but operational efficiency and service provision flexibility are reduced
Solution Approach 1:
The patent implements a feedback mechanism where stations can monitor network conditions and initiate handover requests when service requirements cannot be met. The handover response frame provides feedback about the decision, creating a closed-loop system that maintains stability while enabling efficient operational responses to changing conditions.
Data Source
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AI summary
A method of performing a handover between a first device and a second device is provided. The method including: transmitting a handover request frame for requesting a handover, including information about a reason for requesting the handover, to the second device; receiving a handover response frame including handover request result information indicating whether the handover request is accepted, from the second device; and selectively performing the handover with the second device based on the handover response frame.