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US 2009/0264128 A1Published application
Terminal station, base station, radio communication system, and communication control method
AssigneeMitsubishi Electric Corporation
InventorToshiaki TOMISAWA
Life of this patent
Estimating the term…
Abstract
An uplink quality information collecting unit transmits, when there is no uplink data transmission from a terminal station for a predetermined time, dummy data to a base station that is currently connected to the terminal station, and collects uplink-quality information that is generated by transmitting the dummy data to the base station. A handover determining unit determines whether to perform a handover based on the uplink-quality information collected by the uplink quality information collecting unit.
Claims32
A terminal station that makes up a radio communication system with a base station, the terminal station comprising:
- an uplink quality information collecting unit that transmits, when there is no uplink data transmission from the terminal station for a predetermined time, dummy data to a base station that is currently connected to the terminal station, and collects uplink-quality information that is generated by transmitting the dummy data to the base station;
- and
- a handover determining unit that determines whether to perform a handover based on the uplink-quality information collected by the uplink quality information collecting unit.
A terminal station that makes up a radio communication system with a plurality of base stations, the terminal station comprising:
- an uplink quality information collecting unit that periodically transmits dummy data to a base station that a base station currently connected to the terminal station, and collects uplink-quality information that is generated by transmitting the dummy data to the base station;
- and
- a handover determining unit that determines whether to perform a handover based on the uplink-quality information collected by the uplink quality information collecting unit.
A base station that makes up a radio communication system with a terminal station, the base station comprising:
- a downlink quality information collecting unit that transmits, when there is no downlink data transmission for a predetermined time, dummy data to a terminal station that is currently connected to the base station, and collects downlink-quality information that is generated by transmitting the dummy data to the terminal station;
- and
- an information transmitting unit that transmits the downlink-quality information collected by the downlink quality information collecting unit to the terminal station, based on which the terminal station determines whether to perform a handover.
A base station that makes up a radio communication system with a terminal station, the base station comprising:
- a downlink quality information collecting unit that periodically transmits dummy data to a terminal station that is currently connected to the base station, and collects downlink-quality information that is generated by transmitting the dummy data to the terminal station;
- and
- an information transmitting unit that transmits the downlink-quality information collected by the downlink quality information collecting unit to the terminal station, based on which the terminal station determines whether to perform a handover.
A radio communication system comprising a terminal station and a base station, wherein
- the terminal station includes
- an uplink quality information collecting unit that transmits, when there is no uplink data transmission from the terminal station for a predetermined time, dummy data to a base station that is currently connected to the terminal station, and collects uplink-quality information that is generated by transmitting the dummy data to the base station, and
- a handover determining unit that determines whether to perform a handover based on the uplink-quality information collected by the uplink quality information collecting unit, and
- the base station includes
- a downlink quality information collecting unit that transmits, when there is no downlink data transmission for a predetermined time, dummy data to a terminal station that is currently connected to the base station, and collects downlink-quality information that is generated by transmitting the dummy data to the terminal station, and
- an information transmitting unit that transmits the downlink-quality information collected by the downlink quality information collecting unit to the terminal station, based on which the terminal station determines whether to perform a handover.
3 more elements
A radio communication system comprising a terminal station and a base station, wherein
- the terminal station includes
- an uplink quality information collecting unit that periodically transmits dummy data to a base station that a base station currently connected to the terminal station, and collects uplink-quality information that is generated by transmitting the dummy data to the base station, and
- a handover determining unit that determines whether to perform a handover based on the uplink-quality information collected by the uplink quality information collecting unit, and
- the base station includes
- a downlink quality information collecting unit that periodically transmits dummy data to a terminal station that is currently connected to the base station, and collects downlink-quality information that is generated by transmitting the dummy data to the terminal station, and
- an information transmitting unit that transmits the downlink-quality information collected by the downlink quality information collecting unit to the terminal station, based on which the terminal station determines whether to perform a handover.
3 more elements
A radio communication system comprising a terminal station and a base station, wherein
- the terminal station includes
- an uplink quality information collecting unit that transmits, when there is no uplink data transmission from the terminal station for a predetermined time, dummy data to a base station that is currently connected to the terminal station, and collects uplink-quality information that is generated by transmitting the dummy data to the base station, and
- a handover determining unit that determines whether to perform a handover based on the uplink-quality information collected by the uplink quality information collecting unit, and
- the base station includes
- a downlink quality information collecting unit that transmits, when there is no downlink data transmission for a predetermined time, dummy data to a terminal station that is currently connected to the base station, and collects downlink-quality information that is generated by transmitting the dummy data to the terminal station, and
- an information transmitting unit that transmits the downlink-quality information collected by the downlink quality information collecting unit to the terminal station, based on which the terminal station determines whether to perform a handover.
3 more elements
A radio communication system comprising a terminal station and a base station, wherein
- the terminal station includes
- an uplink quality information collecting unit that periodically transmits dummy data to a base station that a base station currently connected to the terminal station, and collects uplink-quality information that is generated by transmitting the dummy data to the base station, and
- a handover determining unit that determines whether to perform a handover based on the uplink-quality information collected by the uplink quality information collecting unit, and
- the base station includes
- a downlink quality information collecting unit that periodically transmits dummy data to a terminal station that is currently connected to the base station, and collects downlink-quality information that is generated by transmitting the dummy data to the terminal station, and
- an information transmitting unit that transmits the downlink-quality information collected by the downlink quality information collecting unit to the terminal station, based on which the terminal station determines whether to perform a handover.
3 more elements
A method of determining whether to perform a handover in a terminal station that makes up a radio communication system with a base station, the method comprising:
- monitoring an uplink data transmission from the terminal station to a base station that is currently connected to the terminal station;
- transmitting, when a result of monitoring at the monitoring indicates that there is no uplink data transmission for a predetermined time, dummy data to the base station;
- collecting uplink-quality information that is generated by transmitting the dummy data to the base station;
- and
- determining whether to perform the handover based on the uplink-quality information collected at the collecting.
2 more elements
A method of determining whether to perform a handover in a terminal station that makes up a radio communication system with a base station, the method comprising:
- transmitting periodically dummy data to a base station that is currently connected to the terminal station;
- collecting uplink-quality information that is generated by transmitting the dummy data to the base station;
- and
- determining whether to perform the handover based on the downlink-quality information collected at the collecting.
1 more element
A method of transmitting downlink-quality information to a terminal station from a base station in a radio communication system, the method comprising:
- monitoring a downlink data transmission to a terminal station that is currently connected to the base station;
- transmitting, when a result of monitoring at the monitoring indicates that there is no downlink data transmission for a predetermined time, dummy data to the terminal station;
- collecting downlink-quality information that is generated by transmitting the dummy data to the terminal station;
- and
- transmitting the downlink-quality information collected at the collecting to the terminal station, based on which the terminal station determines whether to perform a handover.
2 more elements
A method of transmitting downlink-quality information to a terminal station from a base station in a radio communication system, the method comprising:
- transmitting periodically dummy data to a terminal station that is currently connected to the base station;
- collecting downlink-quality information that is generated by transmitting the dummy data to the terminal station;
- and
- transmitting the downlink-quality information collected at the collecting to the terminal station, based on which the terminal station determines whether to perform a handover.
1 more element
Dependencies are inferred from the claim text.