METHOD FOR CONNECTION ESTABLISHMENT USING COMMON RANDOM ACCESS PREAMBLE
First Claim
1. A method comprising:
- receiving, at an unmanned aerial vehicle (UAV), a set of Random Access preambles;
selecting one of the Random Access preambles; and
transmitting the selected Random Access preamble to multiple cells.
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Abstract
An unmanned aerial vehicle (UAV) receives a set of Random Access preambles, determines its UAV status, and selects a Random Access preamble from the set of Random Access preambles. In some cases, the set of Random Access preambles are allocated for use by UAVs and are common to a plurality of neighboring cells. The UAV transmits the selected Random Access preamble to multiple neighboring cells. One of the neighboring cells that received the selected Random Access preamble transmits a Random Access Response to the UAV. The UAV determines which cell sent the Random Access Response, reselects to the cell that sent the Random Access Response, and transmits a Radio Resource Control (RRC) Connection Establishment Request to the reselected cell. Upon completion of a Random Access Channel (RACH) procedure, the reselected cell becomes the serving cell for the UAV.
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Citations
24 Claims
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1. A method comprising:
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receiving, at an unmanned aerial vehicle (UAV), a set of Random Access preambles; selecting one of the Random Access preambles; and transmitting the selected Random Access preamble to multiple cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system comprising:
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an unmanned aerial vehicle (UAV) comprising; a receiver configured to receive a set of Random Access preambles, a controller configured to select one of the Random Access preambles, and a transmitter configured to transmit the selected Random Access preamble; a first cell comprising a receiver configured to receive the selected Random Access preamble; and a second cell comprising a receiver configured to receive the selected Random Access preamble. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification