User equipment apparatus, base station, and random access method
AssigneeNtt Docomo, Inc.
InventorsTomoya Ohara, Hiroki Harada
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Abstract
In one aspect of the present invention, a user equipment apparatus includes a reception unit configured to receive, from a base station, control information indicating a pattern of retransmission schemes to be applied depending on a retransmission count, for retransmitting a preamble through random access to the base station, the retransmission schemes including beam switching and power ramping; and a transmission unit configured to transmit the preamble according to the control information at timing of retransmitting the preamble.
Claims7
A terminal, comprising:
- a reception unit configured to receive, from a base station, control information indicating a pattern of retransmission schemes to be applied depending on a retransmission count, for retransmitting a preamble through random access to the base station, the retransmission schemes including beam switching and power ramping;
- and
- a transmission unit configured to transmit the preamble according to the control information at timing of retransmitting the preamble,
- wherein a retransmission scheme used to retransmit the preamble is selected from the retransmission schemes including the beam switching and the power ramping according to an increase in the retransmission count.
A base station, comprising:
- a transmission unit configured to transmit, to a terminal, control information indicating a pattern of retransmission schemes to be applied depending on a retransmission count, for the terminal to retransmit a preamble through random access, the retransmission schemes including beam switching and power ramping;
- and
- a reception unit configured to receive the preamble transmitted according to the control information,
- wherein a retransmission scheme used to retransmit the preamble is selected from the retransmission schemes including the beam switching and the power ramping according to an increase in the retransmission count.
A random access method in a terminal, comprising the steps of:
- receiving, from a base station, control information indicating a pattern of retransmission schemes to be applied depending on a retransmission count, for retransmitting a preamble through random access to the base station, the retransmission schemes including beam switching and power ramping;
- and
- transmitting the preamble according to the control information at timing of retransmitting the preamble,
- wherein a retransmission scheme used to retransmit the preamble is selected from the retransmission schemes including the beam switching and the power ramping according to an increase in the retransmission count.
A random access method in a base station, comprising:
- transmitting, to a terminal, control information indicating a pattern of retransmission schemes to be applied depending on a retransmission count, for the terminal to retransmit a preamble through random access, the retransmission schemes including beam switching and power ramping;
- and
- receiving the preamble transmitted according to the control information,
- wherein a retransmission scheme used to retransmit the preamble is selected from the retransmission schemes including the beam switching and the power ramping according to an increase in the retransmission count.
Dependencies are inferred from the claim text.