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US 11,606,117 B2Granted
Frequency hopping pattern for random access channel preamble based on coverage enhancement level
AssigneeQUALCOMM Incorporated
InventorsYongjun Kwak, Hung Dinh Ly, Jing Lei, Yuchul Kim, Hwan Joon Kwon
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Abstract
Disclosed are techniques for wireless communication. In an aspect, a UE determines a frequency hopping pattern for transmission of a physical random access channel (PRACH) preamble based on an associated PRACH coverage enhancement (CE) level, and transmits the PRACH preamble in accordance with the frequency hopping pattern and the associated PRACH CE level. A base station receives the PRACH preamble, and transmits a response (e.g., Msg2 or MsgA) to the PRACH preamble.
Claims25
A method of operating a user equipment (UE), comprising:
- determining a frequency hopping pattern for transmission of a first physical random access channel (PRACH) preamble based on an associated PRACH coverage enhancement (CE) level;
- and
- transmitting the first PRACH preamble in accordance with the frequency hopping pattern and the associated PRACH CE level,
- wherein the frequency hopping pattern comprises two or more repetitions of an intra-band frequency hopping pattern with intra-band frequency hopping between different parts of a first bandwidth (BW), followed by an inter-band hop to a second BW in accordance with an inter-band frequency hopping pattern, or
- wherein the first PRACH preamble is transmitted on a first transmit beam at a first transmission power level, a second PRACH preamble is transmitted in accordance with the frequency hopping pattern, and the second PRACH preamble is transmitted on a second transmit beam at a second transmission power level that is higher than the first transmission power level.
2 more elements
A method of operating a network component, comprising:
- receiving, from a user equipment (UE), a physical random access channel (PRACH) preamble with a frequency hopping pattern that is based on an associated PRACH coverage enhancement (CE) level;
- and
- transmitting, to the UE, a response to the PRACH preamble,
- wherein the frequency hopping pattern comprises two or more repetitions of an intra-band frequency hopping pattern with intra-band frequency hopping between different parts of a first bandwidth (BW), followed by an inter-band hop to a second BW in accordance with an inter-band frequency hopping pattern.
1 more element
A user equipment (UE), comprising:
- a memory;
- a communication interface;
- and
- at least one processor communicatively coupled to the memory and the communication interface, the at least one processor configured to:
- determine a frequency hopping pattern for transmission of a first physical random access channel (PRACH) preamble based on an associated PRACH coverage enhancement (CE) level;
- and
- cause the communication interface to transmit the first PRACH preamble in accordance with the frequency hopping pattern and the associated PRACH CE level,
- wherein the frequency hopping pattern comprises two or more repetitions of an intra-band frequency hopping pattern with intra-band frequency hopping between different parts of a first bandwidth (BW), followed by an inter-band hop to a second BW in accordance with an inter-band frequency hopping pattern, or
- wherein the first PRACH preamble is transmitted on a first transmit beam at a first transmission power level, the at least one processor is further configured to transmit a second PRACH preamble in accordance with the frequency hopping pattern, wherein the second PRACH preamble is transmitted on a second transmit beam at a second transmission power level that is higher than the first transmission power level.
6 more elements
A network component, comprising:
- a memory;
- a communication interface;
- and
- at least one processor communicatively coupled to the memory and the communication interface, the at least one processor configured to:
- cause the communication interface to receive, via the communication interface, from a user equipment (UE), a physical random access channel (PRACH) preamble with a frequency hopping pattern that is based on an associated PRACH coverage enhancement (CE) level;
- and
- cause the communication interface to transmit, to the UE, a response to the PRACH preamble,
- wherein the frequency hopping pattern comprises two or more repetitions of an intra-band frequency hopping pattern with intra-band frequency hopping between different parts of a first bandwidth (BW), followed by an inter-band hop to a second BW in accordance with an inter-band frequency hopping pattern.
5 more elements
Dependencies are inferred from the claim text.