Long-range device discovery with directional transmissions
AssigneeInterDigital Patent Holdings, Inc.
InventorsArnab ROY, Yugeswar DEENOO, Philip J. PIETRASKI, Ravikumar V. PRAGADA, Onur SAHIN
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Abstract
Device discovery at long ranges using directional antenna patterns for both transmission and reception of discovery beacon messages and discovery beacon response messages. Omnidirectional band transmissions to assist aiming a directional antenna are also described. Further, discovery beacons that include only those information elements which are necessary for device discovery are discussed, as well as separate scheduling beacons. The discovery beacon may include more robust encoding to increase discovery range or may be transmitted using a narrower channel to improve signal to noise ratio.
Claims20
A method for device discovery in wireless communications, comprising:
- scanning for a beacon using each beam of a plurality of antenna beams for reception;
- on a condition that a beacon is received in a reception time slot using a beam of the plurality of antenna beams and based upon information contained in the beacon, truncating the scan;
- and,
- transmitting a beacon response using the first beam during a transmission time slot corresponding to the reception time slot.
A method for device discovery in wireless communications, comprising:
- transmitting a beacon using each beam of a plurality of antenna beams, wherein the beacon contains information regarding a beacon response period;
- scanning for a beacon response using each beam of the plurality of antenna beams and,
- on a condition that a beacon response is received in a reception time slot of the beacon response period using a first beam of the plurality of antenna beams, transmitting an acknowledgement using the first beam of the plurality of antenna beams.
Dependencies are inferred from the claim text.