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US 10,945,290 B2Granted
Random access using supplemental uplink
AssigneeComcast Cable Communications, LLC
InventorsHyoungsuk Jeon, Esmael Dinan, Kyungmin Park, Alireza Babaei, Hua Zhou
Life of this patent
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Abstract
Systems, apparatuses, and methods are described for wireless communications. A base station may configure a plurality of random access configurations for a wireless device on different uplink carriers, such as a supplemental uplink carrier and a non-supplemental uplink carrier. The wireless device may fall back to a second uplink carrier if a random access procedure fails on the first uplink carrier.
Claims25
A method comprising:
- receiving, by a wireless device from a base station, control information that is configured to cause random access preamble transmission and that comprises random access parameters indicating:
- a first random access channel resource of a first uplink carrier of a cell;
- and
- a second random access channel resource of a second uplink carrier of the cell;
- sending, via the first random access channel resource of the first uplink carrier and based on the control information, at least one first random access preamble for a first random access procedure;
- determining that the first random access procedure is unsuccessful;
- and
- sending, via the second random access channel resource of the second uplink carrier and based on the determining that the first random access procedure is unsuccessful, at least one second random access preamble for a second random access procedure.
5 more elements
A method comprising:
- receiving, by a wireless device from a base station, control information indicating an addition of a secondary cell of the base station, wherein the control information is configured to cause random access preamble transmission and comprises random access parameters indicating:
- a first random access channel resource of a first uplink carrier of the secondary cell;
- and
- a second random access channel resource of a second uplink carrier of the secondary cell;
- sending, via the first random access channel resource of the first uplink carrier of the secondary cell and based on the control information, at least one first random access preamble for a first random access procedure;
- determining that the first random access procedure is unsuccessful;
- and
- sending, via the second random access channel resource of the second uplink carrier of the secondary cell and based on the determining that the first random access procedure is unsuccessful, at least one second random access preamble for a second random access procedure.
5 more elements
A method comprising:
- receiving, by a wireless device from a base station, control information that is configured to cause random access preamble transmission and that indicates:
- a first random access channel resource of a first uplink carrier of a cell;
- a second random access channel resource of a second uplink carrier of the cell;
- and
- prioritization of the first uplink carrier relative to the second uplink carrier;
- sending, via the first random access channel resource of the first uplink carrier and based on the control information, at least one first random access preamble for a first random access procedure;
- and
- determining, based on whether the first random access procedure is unsuccessful, whether to send, via the second random access channel resource of the second uplink carrier, at least one second random access preamble for a second random access procedure.
5 more elements
Dependencies are inferred from the claim text.