Wi-Fi Direct Peer-to-Peer Connection Simplification
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Solution Overview
Problem
The current Wi-Fi Direct protocol for peer-to-peer connections is complex and prone to failures due to frequency hopping and uncompromising master-slave negotiations, leading to unstable and time-consuming connection establishment.
Innovation Solution
A wireless communication device and method that simplifies the connection process by broadcasting a peer-to-peer connection packet without specifying a destination, allowing the device to determine its role as master or slave based on received packets, and establishing connections without frequency hopping, thus avoiding the complexities of the Wi-Fi Direct protocol's social channels and negotiation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the Wi-Fi Direct protocol uses frequency hopping and social channels for device discovery, then devices can be found and connected, but the connection process becomes complex and time-consuming
Solution Approach 1:
The patent extracts and removes the frequency hopping mechanism from the connection establishment process. Devices maintain a static channel assignment instead of hopping between channels, eliminating the complexity of Listen State, Scan State, and Find Phase while preserving the ability to discover and connect to peer devices
Solution Approach 2:
Instead of devices actively scanning and hopping through multiple channels to find each other, the patent inverts the approach by having devices wait to be discovered on their assigned channel. The discovering device performs the active search while the discovered device remains passive, simplifying the overall process
2Reliability
If the Wi-Fi Direct protocol implements GO Negotiation with three packet exchanges, then master-slave relationship is determined, but the negotiation process consumes time and may fail due to transmission loss
Solution Approach 1:
The patent removes the three-packet GO Negotiation exchange (GO Negotiation Request, GO Negotiation Response, and GO Negotiation Confirmation) from the connection process. The master-slave relationship is determined through a simplified mechanism that does not require multiple back-and-forth packet exchanges, reducing both time consumption and failure points
Solution Approach 2:
The patent performs the role determination action in advance or through a simplified single-step process rather than through iterative negotiation. Devices determine their roles before establishing the connection, eliminating the need for repeated packet exchanges to resolve master-slave relationships
3Reliability
If the Wi-Fi Direct protocol requires devices to switch between Listen State, Scan State, and Find Phase, then devices can discover each other, but the iterative process increases connection establishment time
Solution Approach 1:
The patent extracts and eliminates the iterative state switching mechanism (Listen State, Scan State, Find Phase) from the device discovery process. Devices remain in a stable state and are discovered through direct packet exchange on their assigned channel without requiring periodic state transitions or channel hopping
Data Source
AI summary
The present invention discloses a wireless communication device capable of establishing peer-to-peer connection passively or actively. The device conforms to an IEEE 802.11 standard, and comprises: a control block, a transmission circuit and a reception circuit. When the device intends to passively establish peer-to-peer connection, said control block generates a local-end peer-to-peer connection message which includes a local-end group owner intent but isn't generated in response to any known/detected device; said transmission circuit broadcasts a local-end peer-to-peer connection packet according to the message; and said reception circuit receives a connection-end peer-to-peer connection request from a connection-end for the first time after broadcasting the message, wherein the request includes a connection-end group owner decision related to the local-end group owner intent. Accordingly, after receiving the request, the wireless communication device functions as a master or a slave according to the decision, and then establishes the peer-to-peer connection with the first connection-end.