US 11,778,667 B2 · Mitigating interference in channel access involving multiple systems

Abstract

In connection with an RF communication system, exemplary aspects involve a method for use in a communication system in which a first system (e.g., 802.11) that is asynchronously based and which is susceptible to interference from a second system (e.g., synchronous-based LTE-CV2X). Such interference is due to the frequency spectrum used by the first and second systems overlapping. To mitigate interference issues, example methods spreads out the times for messages in the first system, based on information concerning occupancy of the channel, and transmitting them relative to the end of a cycled transmission allocated for use by the second system.

Claims19

Dependent claims

A method for communicating in a broadcast mode over a channel in a first system that is asynchronously based and susceptible to interference from a second system at least partially overlapping with the channel of the first system, the method comprising:

based on information concerning duration of occupancy of the channel, spreading out times for messages of the first system to be transmitted relative to an end of a cycled transmission time allocated for use by the second system, including:
assessing whether the channel is busy;
in response to determining the channel is busy, measuring a time during which the channel is continuously busy using a local counter;
determining whether the time during which the channel is continuously busy exceeds a threshold;
and
in response to determining that the time during which the channel is continuously busy exceeds the threshold, increasing a contention parameter to indicate that an increased random or pseudo-random backoff period is to be applied before a station of the first system is to access the channel.

3 more elements

An apparatus for use in communicating over a channel via a first system that is asynchronously based and susceptible to interference from a second system which communicates in spectrum that at least partially overlaps with the channel of the first system, the apparatus comprising:

processing circuitry to use information concerning duration of occupancy of the channel, and to spread out times for messages of the first system to be transmitted relative to an end of a cycled transmission time allocated for use by the second system, wherein the processing circuitry is further configured to:
assess whether the channel is busy;
in response to a determination the channel is busy, measure a time during which the channel is continuously busy using a local counter;
determine whether the time during which the channel is continuously busy exceeds a threshold;
and
in response to a determination that the time during which the channel is continuously busy exceeds the threshold, increase a contention parameter to indicate that an increased random or pseudo-random backoff period is to be applied before a station of the first system is to access the channel.

3 more elements

Dependencies are inferred from the claim text.

Mitigating interference in channel access involving multiple systems

Life of this patent

Mitigating interference in channel access involving multiple systems

Life of this patent

Abstract

Claims19