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US 2019/0357262 A1Published application
Random Access Procedures Using Multiple Active Bandwidth Parts
AssigneeComcast Cable Communications, LLC
InventorsAli Cirik, Esmael Hejazi Dinan, Hua Zhou, Hyoungsuk Jeon, Alireza Babaei
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Abstract
Wireless communications using multiple active resources (e.g., bandwidth parts (BWP)) are described. A predetermined rule may be used to determine on which downlink (DL) BWP of multiple active DL BWPs, and/or on which uplink (UL) BWP of multiple active UL BWPs, a message is to be sent. A wireless device and/or a base station may reduce the quantity of active DL BWPs and/or active UL BWPs to monitor for a response.
Claims20
A method comprising:
- receiving, by a wireless device, one or more configuration parameters for uplink bandwidth parts (BWPs) of a cell;
- activating at least two uplink BWPs of the uplink BWPs;
- initiating a random access procedure for the cell;
- based on determining that the at least two uplink BWPs are not configured with random access channel resources, determining a first uplink BWP of the at least two uplink BWPs;
- switching from the first uplink BWP to a second uplink BWP of the uplink BWPs;
- and
- sending, via the second uplink BWP, a preamble for the random access procedure.
4 more elements
A method comprising:
- receiving, by a wireless device, one or more configuration parameters for bandwidth parts (BWPs) of a cell;
- activating at least two BWPs of the BWPs;
- initiating a random access procedure for the cell;
- based on determining that the at least two BWPs are not configured with random access channel resources, determining a first BWP of the at least two BWPs;
- switching from the first BWP to a different BWP of the BWPs;
- and
- sending, via the different BWP, a preamble for the random access procedure.
4 more elements
A method comprising:
- receiving, by a wireless device, one or more configuration parameters for a first BWP of a first cell and a second BWP of the first cell;
- activating the first BWP and the second BWP, wherein the first BWP is associated with a first random-access response (RAR) monitoring window and the second BWP is associated with a second RAR monitoring window;
- sending, via a second cell, at least one preamble for a random access procedure;
- starting, based on the sending the at least one preamble, the first RAR monitoring window and the second RAR monitoring window for monitoring a random access response to the at least one preamble;
- determining that the first RAR monitoring window and the second RAR monitoring window have expired;
- and
- sending, based on the determining, at least one second preamble.
4 more elements
Dependencies are inferred from the claim text.