Apparatus and method for performing random access in beam-formed system
AssigneeSamsung Electronics Co., Ltd.
InventorsAnil Agiwal, Youngbin Chang, Nigam Anshuman
Life of this patent
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Abstract
A method for performing a random access is provided. The method includes identifying a first downlink (DL) reception (RX) beam based on a measurement on a beam measurement signal, identifying a first uplink (UL) transmission (TX) beam corresponding to the identified first DL RX beam and transmitting at least one random access preamble for an RX sweeping at a base station, using the identified first UL TX beam based on a first power.
Claims18
A method performed by a terminal in a wireless communication system, comprising:
- receiving, from a first base station, a radio resource control (RRC) message including a random access configuration of a second base station, the random access configuration including information on dedicated random access preamble transmission resources for one or more downlink (DL) transmission (TX) beams of the second base station;
- identifying a DL TX beam among the one or more DL TX beams of the second base station;
- identifying a random access preamble transmission resource corresponding to the identified DL TX beam among the dedicated random access preamble transmission resources for the one or more DL TX beams in the random access configuration of the second base station;
- and
- transmitting, to the second base station, a random access preamble on the random access preamble transmission resource.
A method performed by a first base station in a wireless communication system, comprising:
- receiving, from a second base station, a random access configuration of the second base station, the random access configuration including information on dedicated random access preamble transmission resources for one or more downlink (DL) transmission (TX) beams of the second base station;
- and
- transmitting, to a terminal, a radio resource control (RRC) message including the received random access configuration of the second base station,
- wherein a random access preamble is transmitted from the terminal to the second base station on a random access preamble transmission resource identified among the dedicated random access preamble transmission resources for the one or more DL TX beams in the random access configuration of the second base station.
A terminal in a wireless communication system, the terminal comprising:
- a transceiver configured to transmit and receive signals;
- and
- at least one processor configured to:
- receive, from a first base station via the transceiver, a radio resource control (RRC) message including a random access configuration of a second base station, the random access configuration including information on dedicated random access preamble transmission resources for one or more downlink (DL) transmission (TX) beams of the second base station,
- identify a DL TX beam among the one or more DL TX beams of the second base station,
- identify a random access preamble transmission resource corresponding to the identified DL TX beam among the dedicated random access preamble transmission resources for the one or more DL TX beams in the random access configuration of the second base station, and
- transmit, to the second base station via the transceiver, a random access preamble on the random access preamble transmission resource.
A first base station in a wireless communication system, comprising:
- a transceiver configured to transmit and receive signals;
- and
- at least one processor configured to:
- receive, from a second base station via the transceiver, a random access configuration of the second base station, the random access configuration including information on dedicated random access preamble transmission resources for one or more downlink (DL) transmission (TX) beams of the second base station, and
- transmit, to a terminal via the transceiver, an radio resource control (RRC) message including the received random access configuration of the second base station,
- wherein a random access preamble is transmitted from the terminal to the second base station on a random access preamble transmission resource identified among the dedicated random access preamble transmission resources for the one or more DL TX beams in the random access configuration of the second base station.
Dependencies are inferred from the claim text.