Ad Hoc Wireless Network Peer-to-Peer Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for techniques to efficiently support peer-to-peer communication between wireless devices, especially when WWAN and WLAN are not present, to ensure quick and efficient call connection regardless of network coverage.
Innovation Solution
Wireless devices perform discovery, authentication, and form ad hoc networks using pre-shared keys or certificates to communicate peer-to-peer, with methods including background and active discovery, IP address discovery, and quality of service handling for traffic data, even in the absence of WWAN and WLAN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If peer-to-peer communication is implemented without WWAN and WLAN coverage, then communication independence and versatility are improved, but device complexity and security management become worse
Solution Approach 1:
The patent applies preliminary action by pre-provisioning security credentials (certificates or pre-shared keys) on wireless devices before peer-to-peer communication occurs. This allows devices to independently establish secure ad hoc networks without requiring real-time authentication infrastructure, thereby improving communication independence while managing complexity through advance preparation
Solution Approach 2:
The patent uses intermediary elements in the form of pre-configured security credentials that mediate authentication between devices. These credentials act as intermediaries that enable secure peer-to-peer communication without requiring direct connection to WWAN or WLAN infrastructure, resolving the contradiction between independence and security management
2Speed
If discovery frames are sent frequently to discover target wireless devices, then discovery speed and communication establishment are improved, but energy consumption increases
Solution Approach 1:
The patent applies periodic action by implementing discovery frames that are sent at specific intervals rather than continuously. The system periodically attempts to discover target devices using pre-configured identifiers, and can adjust the frequency of these periodic attempts based on communication needs, thereby balancing discovery speed with energy conservation
Solution Approach 2:
The patent uses preliminary action by pre-configuring lists of target device identifiers before discovery begins. This allows the device to efficiently check for specific targets without needing to continuously scan all possible devices, improving discovery speed for known targets while reducing overall energy consumption compared to exhaustive scanning
Data Source
AI summary
For a peer-to-peer call in an ad hoc wireless network, a wireless device performs discovery of a target wireless device, performs authentication of the target wireless device and generates a session key (e.g., using a pre-shared key or a certificate provisioned on the wireless device), forms an ad hoc wireless network with the target wireless device, and communicates peer-to-peer with the target wireless device via the ad hoc wireless network. The wireless device may perform discovery with a list of identifiers for wireless devices designated to communicate with this wireless device. The wireless device may derive a service set identifier (SSID) used to identify the ad hoc wireless network based on its user-specific identifier (e.g., its phone number) and/or a user-specific identifier for the target wireless device. The wireless device may also performs IP address discovery using the user-specific identifier for the target wireless device.