Apparatus and method for random access in a wireless communication systems
AssigneeSamsung Electronics Co., Ltd.
InventorShangbin Wu
Life of this patent
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Abstract
A 5th Generation (5G) or pre-5G communication system for supporting a higher data rate than a 4G communication system such as Long Term Evolution (LTE) is provided. A method of a terminal for operating a random access in a wireless communication system may include transmitting, to a base station, a first message comprising a random access preamble, and receiving a plurality of second messages transmitted from the base station in response to the first message. A method of a base station for operating a random access in a wireless communication system may include receiving, from a terminal, a first message comprising a random access preamble, and transmitting, to the terminal, a plurality of second messages in response to the first message.
Claims17
A method of a terminal in a wireless communication system, the method comprising:
- transmitting, to a base station (BS), a random access preamble in a physical random access channel (PRACH);
- receiving, from the BS, at least one of a plurality of random access responses (RARs) for the random access preamble, wherein the plurality of RARs comprise different uplink grants;
- identifying a RAR among the plurality of RARs;
- transmitting, to the BS, a first message comprising an identity of the terminal based on an uplink grant in the identified RAR;
- and
- receiving, from the BS, a second message comprising information indicating whether a random access of the terminal succeeds, in response to the first message,
- wherein a number of the plurality of RARs corresponds to a number of terminals including the terminal that transmit the random access preamble in the PRACH.
A method of a base station (BS) in a wireless communication system, the method comprising:
- receiving, from a terminal, a random access preamble in a physical random access channel (PRACH);
- and
- transmitting, to the terminal, a plurality of random access responses (RARs) for the random access preamble, wherein the plurality of RARs comprise different uplink grants for the terminal;
- and
- receiving, from the terminal, a first message that is transmitted based on an uplink grant, wherein the first message comprises an identity of the terminal;
- and
- transmitting, to the terminal, a second message comprising information indicating whether a random access of the terminal succeeds, in response to the message,
- wherein the uplink grant is included in a RAR that is identified by the terminal among the plurality of RARs, and
- wherein a number of the plurality of RARs corresponds to a number of terminals including the terminal that transmit the random access preamble in the PRACH.
A base station (BS) in a wireless communication system, the base station comprising:
- a transceiver;
- and
- at least one processor, operatively connected to the transceiver, configured to:
- receive, from a terminal, a random access preamble, in a physical random access channel (PRACH),
- transmit, to the terminal, a plurality of random access responses (RARs) for the random access preamble, wherein the plurality of RARs comprise different uplink grants for the terminal,
- receive, from the terminal, a first message that is transmitted based on an uplink grant, wherein the first message comprises an identity of the terminal, and
- transmit, to the terminal, a second message comprising information indicating whether a random access of the terminal succeeds, in response to the first message,
- wherein the uplink grant is included in a RAR that is identified by the terminal among the plurality of RARs, and
- wherein a number of the plurality of RARs corresponds to a number of terminals including the terminal that transmit the random access preamble in the PRACH.
Dependencies are inferred from the claim text.