Patent ID: 9154945
Filing Date: 2015-10-06
Classification: H04L,H04W

Abstract:
1. An apparatus comprising: at least one processor; memory storing computer program code; wherein the memory storing the computer program code is configured to, with the at least one processor, cause the apparatus to at least: upon receipt by a receiving wireless node of a message associated with a group of wireless nodes, compare indicia in the message against indicia determined based on sensed radio channel characteristics for a radio channel used for communication between nodes belonging to a group with which the message is associated, wherein the nodes belonging to the group are communicating in relatively close proximity to one another, and wherein the sensed radio channel characteristics on which determination of the indicia are based comprise characteristics of one or more physical radio carriers used in locale in which members of the group are communicating with one another, and wherein the sensed radio channel characteristics are determined at least in part through IEEE 802.11 radio carrier sensing, wherein IEEE 802.11 radio carrier sensing comprises sensing a value of an IEEE 802.11 physical carrier and sensing a value of an IEEE 802.11 virtual carrier, and wherein determining the indicia based on sensed radio channel characteristics comprises determining a sequence of physical and virtual carrier values that is time and place specific; and direct response by the receiving wireless node to the message only if the indicia in the message match the indicia determined based on the sensed radio channel characteristics within a specified threshold.