Relay-attack resistant communications
AssigneeTexas Instruments Incorporated
InventorsTomas Motos, Khanh Tuan Le
Life of this patent
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Abstract
A method of relay-attack resistant communications in a wireless communications system that includes a master wireless device (Master) sending a synchronization signal to a slave wireless device (Slave). The synchronization signal includes timing information including a common time reference and a timeslot duration for interlocking Master communication timeslots for Master and Slave communication timeslots so that an alternating TX and RX role pattern is provided. The Master analyzes Slave packet data received from the Slave to identify overlaps of a transmission from the Master and the slave packet data, and in a case of detecting overlap, suspends communications from Master to Slave to prevent a relay-attack.
Claims15
A method comprising:
- sending, from a wireless device, a synchronization signal, wherein the synchronization signal includes a common time reference and a timeslot duration for interlocking communication timeslots so that an alternating TX and RX role pattern for the wireless device is provided;
- receiving, at the wireless device, a first packet data during the RX role;
- identifying, by the wireless device, an overlap of receiving the first packet data while transmitting a second packet data during the TX role;
- and
- suspending, by the wireless device, communications in response to identifying an overlap of receiving the first packet data while transmitting the second packet data during the TX role.
An apparatus comprising:
- a processor;
- and
- memory including instructions which, when executed, cause the processor to at least:
- send a synchronization signal, the synchronization signal including a common time reference and a timeslot duration for interlocking communication timeslots so that an alternating TX and RX role pattern for the wireless device is provided;
- receive a first packet data during the RX role;
- identify an overlap of the first packet data with a second packet data while transmitting the second packet data during the TX role;
- and
- suspend communications in response to identifying an overlap of the first packet data with the second packet data during the TX role.
Dependencies are inferred from the claim text.