Methods and apparatuses for random access
AssigneeLenovo (Beijing) Limited
InventorsYuantao Zhang, Hongmei Liu, Zhi Yan, Yingying Li, Haiming Wang
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Abstract
Disclosed are methods for a random access. One embodiment of the subject application provides a method performed by a user equipment, comprising sending a first message including a preamble; receiving a downlink control information (DCI) for scheduling a second message; determining a first resource, which is allocated based on a first resource unit; determining existence of a second resource, which is allocated based on a second resource unit, according to the DCI; and receiving the second message based on the determination. Related apparatuses are also disclosed.
Claims15
A user equipment (UE) for wireless communication, comprising:
- at least one memory;
- and
- at least one processor coupled with the at least one memory and operable to cause the UE to:
- send a first message including a preamble;
- receive a downlink control information (DCI) for scheduling a second message;
- determine a first resource for the second message, which is allocated based on a first resource unit;
- and
- determine existence of a second resource for the second message, which is allocated based on a second resource unit, according to the DCI, wherein:
- the second resource is determined to be existed in response to one or more of a value of a scaling factor included in the DCI being ½ or ¼, or an overlapping ratio determined by an allocation of the first resource and an allocation of the second resource included in the DCI being lower than an overlapping threshold;
- and
- the preamble belongs to a first preamble set when a measurement of downlink channel quality is lower than a threshold;
- or
- the preamble belongs to a second preamble set when a measurement of downlink channel quality is equal to or greater than the threshold, wherein the threshold is indicated based on a configuration.
An apparatus, comprising:
- a memory;
- and
- a processor coupled to the memory, the processor configured to cause the apparatus to:
- receive at least one first message, wherein the at least one first message includes a preamble;
- determine an allocation of a second resource based on a second resource unit in addition to a first resource based on a first resource unit, according to the at least one first message based on the first resource unit, wherein the second resource is determined to be allocated in response to at least one preamble of the at least one first message belonging to a first preamble set;
- and the second resource is determined not to be allocated in response to each preamble of the at least one first message belonging to a second preamble set;
- send a downlink control information (DCI) for scheduling at least one second message based on the determination;
- and
- send at least one second message in the determined resources.
A method, comprising:
- sending, by a user equipment (UE), a first message including a preamble;
- receiving a downlink control information (DCI) for scheduling a second message;
- determining a first resource for the second message, which is allocated based on a first resource unit;
- and
- determining existence of a second resource for the second message, which is allocated based on a second resource unit, according to the DCI, wherein:
- the second resource is determined to be existed in response to one or more of a value of a scaling factor included in the DCI being ½ or ¼, or an overlapping ratio determined by an allocation of the first resource and an allocation of the second resource included in the DCI being lower than an overlapping threshold;
- and
- the preamble belongs to a first preamble set if one or more of the UE belongs to a first type of UEs or a measurement of downlink channel quality is lower than a threshold;
- or
- the preamble belongs to a second preamble set if the UE belongs to a second type of UEs or a measurement of downlink channel quality is equal to or greater than the threshold.
Dependencies are inferred from the claim text.