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US 8,411,647 B2Granted
Random access system for using multi-carrier structure in mobile communication system
AssigneeElectronics and Telecommunications Research Institute
InventorsKyoung Seok Lee, Taegyun Noh, Jae Heung Kim
Life of this patent
Estimating the term…
Abstract
Provided is a system of performing a random access between a base station and a terminal using a plurality of carriers. When using the plurality of carriers, an uplink carrier and a downlink carrier may be mapped to each other in 1:n or 1:1. The terminal may perform the random access based on mapping information between the uplink carrier and the downlink carrier. A random access success rate increases and thus a time used for the random access may decrease. A wireless resource may also be effectively used.
Claims17
A terminal, comprising:
- a preamble transmitter to transmit a first preamble to a base station using an uplink carrier;
- a receiver to receive, in response to the first preamble, information defining a first wireless resource of the uplink carrier using a first downlink carrier selected from a plurality of downlink carriers;
- and
- a data transmitter to transmit first uplink data to the base station using the first wireless resource,
- wherein a second preamble having the same value as the first preamble, is transmitted from a second terminal to the base station receivers, in response to the second preamble, information defining a second wireless resource of the uplink carrier is transmitted from base station receivers to the second terminal using a second downlink carrier selected from a plurality of downlink carriers, the second downlink carrier is selected from the plurality downlink carriers and is different from the first downlink carrier, a second uplink data is transmitted from the second terminal to the base station receiver using the second wireless resource, and the receiver receives, from the base station, information defining a primary carrier selected from the first downlink carrier and the second downlink carrier, and priorly receives downlink data from the base station using the primary carrier.
2 more elements
A base station, comprising:
- a preamble receiver to receive a first preamble from a first terminal using an uplink carrier, and to receive, from a second terminal, a second preamble having the same value as the first preamble using the uplink carrier;
- a transmitter to transmit, to the first terminal in response to the first preamble, information defining a first wireless resource of the uplink carrier using the first downlink carrier, and to transmit, to the second terminal in response to the second preamble, information defining a second wireless resource of the uplink carrier using a second downlink carrier, the second downlink carrier being different from the first downlink carrier and the second wireless resource being different from the first wireless resource;
- and
- a data receiver to receive first uplink data from the first terminal using the first wireless resource, and to receive second uplink data from the second terminal using the second wireless resource
- wherein, the transmitter transmits, to the first terminal, information defining a primary carrier selected from the first downlink carrier and the second downlink carrier, and priorly transmits downlink data to the first terminal using the primary carrier.
2 more elements
A terminal, comprising:
- a receiver to receive, from a base station, information defining a wireless resource of a first uplink carrier and information defining a primary carrier selected from a first downlink carrier and a second downlink carrier;
- a preamble transmitter to transmit a preamble to the base station using the wireless resource of the first uplink carrier;
- and
- a data transmitter,
- wherein in response to the preamble, the receiver receives, from the base station, information defining a wireless resource of a second uplink carrier, priorly receives downlink data from the base station using the primary carrier and
- the data transmitter transmits uplink data to the base station using the wireless resource of the second uplink data.
3 more elements
A base station, comprising:
- a transmitter to transmit, to a terminal, information defining a wireless resource of a first uplink carrier and information defining a primary carrier selected from a first downlink carrier and a second downlink carrier;
- a preamble receiver to receive a preamble from the terminal using the wireless resource of the first uplink carrier;
- and
- a data receiver,
- wherein in response to the preamble, the transmitter transmits, to the terminal, information defining a wireless resource of a second uplink carrier priorly transmits downlink data to the terminal using the primary carrier, and
- the data receiver receives uplink data from the base station using the wireless resource of the second uplink carrier.
3 more elements
Dependencies are inferred from the claim text.