Apple Inc.

Andrew J Ringer

Rohit U Nabar

Su Khiong Yong

Farouk Belghoul

Yannick L Sierra

Mingguang Xu

Qi S Wang

Julien F Freudiger

Samuel David Post

Qi Wang

Kyle C Brogle

Mithat C Dogan

Systems, methods, and computer-readable media may be provided for securely authenticating device identification and/or user identification for low throughput device-to-device wireless communication.

Secure authentication of device identification for low throughput device to-device wireless communication

Communicating wireless devices collaborate and utilize waveforms to enable secure channel estimation. To protect against a repetitive replay attack, some embodiments include Single Carrier Physical Layer (SC-PHY) waveforms and/or interpolated OFDM waveforms that do not include a repeatable or predictable structure. The waveforms are transmitted in ranging packet structures that are compatible with legacy 802.11 technologies that do not utilize secure channel estimation. The ranging packets are received in combination with the information previously exchanged to enable the receiving wireless system to securely determine a channel estimate (e.g., determine a channel estimate without an interloper transmission that is not an authentic first arrival path in a multi-path channel between the wireless systems). Thus, one or both of the wireless systems can estimate the distance between them (or range). Devices utilizing legacy 802.11 technologies may receive the ranging packet structures and determine durations for deferring access to the channel.

Apparatus and method for transmitting a ranging packet compatible with legacy 802.11 systems

Growing community of inventors

Santa Cruz, CA, United States of America

Andrew J Ringer