COLLISION DETECTION IN A SHARED RADIO FREQUENCY SPECTRUM BAND
First Claim
1. A method for wireless communication at a user equipment, comprising:
- detecting a signal in a shared radio frequency spectrum band, the signal including a first communication transmitted using a first radio access technology and a second communication transmitted using a second radio access technology, the second communication overlapping at least a portion of the first communication;
determining a collision of the first communication and the second communication based at least in part on the detecting; and
reporting the collision to a node of a wireless communications network associated with the user equipment.
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Accused Products
Abstract
Detection and reporting techniques for collisions between transmitters of two different radio access technologies (RATs) transmitting in a shared radio frequency spectrum band is described. The collision may occur following a listen-before-talk procedure but prior to transmission of data, and may not affect the reception of the transmitted data. Collisions may be detected using for example, energy sensing, preamble or ready-to-send (RTS) signal detection, or unsuccessful decoding of all or part of a channel reservation signal. A transmitting device may determine a collision has occurred by detecting an energy level during a preamble transmission is greater than a threshold level or by detecting that an energy level during a transmission gap of a time-domain energy pattern is above a threshold level. A receiving device, such as a user equipment (UE), that detects the collision may report the collision to the transmitter.
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Citations
30 Claims
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1. A method for wireless communication at a user equipment, comprising:
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detecting a signal in a shared radio frequency spectrum band, the signal including a first communication transmitted using a first radio access technology and a second communication transmitted using a second radio access technology, the second communication overlapping at least a portion of the first communication; determining a collision of the first communication and the second communication based at least in part on the detecting; and reporting the collision to a node of a wireless communications network associated with the user equipment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for wireless communication at a user equipment, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to; detect a signal in a shared radio frequency spectrum band, the signal including a first communication transmitted using a first radio access technology and a second communication transmitted using a second radio access technology, the second communication overlapping at least a portion of the first communication; determine a collision of the first communication and the second communication based at least in part on detecting; and report the collision to a node of a wireless communications network associated with the user equipment. - View Dependent Claims (17)
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18. A method for wireless communication at a base station, comprising:
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transmitting a first communication to a user equipment over a shared radio frequency spectrum band using a first radio access technology, wherein the first communication comprises a time-domain energy signature that includes a first high energy period and a subsequent first low energy period; identifying that a collision occurred between the first communication and a second communication from a second transmitter using a second radio access technology based at least in part on an energy level detected during the time-domain energy signature; and increasing a contention window for a subsequent communication transmitted over the shared radio frequency spectrum band based at least in part on the identifying. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An apparatus for wireless communication at a base station, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to; transmit a first communication to a user equipment over a shared radio frequency spectrum band using a first radio access technology, wherein the first communication comprises a time-domain energy signature that includes a first high energy period and a subsequent first low energy period; identifying, by the base station, that a collision occurred between the first communication and a second communication from a second transmitter using a second radio access technology based at least in part on an energy level detected during the time-domain energy signature; and increase a contention window for a subsequent communication transmitted over the shared radio frequency spectrum band based at least in part on the identifying.
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Specification