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US 12,588,058 B2Granted
Base station, base station system, and communication method
AssigneeNTT, Inc.
InventorsYasuhiko Inoue, Akira Kishida, Kengo Nagata, Yusuke Asai, Yasushi Takatori
Life of this patent
Estimating the term…
Abstract
A base station (20A) that, in a base station system (1) including a first base station (10) and at least two second base stations (20A, 20B), functions as the first base station (10), includes: a MAC processing unit (103) that performs MAC layer processing and generates a first MAC frame used in common between the first base station (10) and the second base station (20A); and a communication processing unit (105A) that transmits the first MAC frame to the second base station (20A).
Claims8
A base station that, in a base station system including a first base station and at least two second base stations, functions as the first base station, the first base station comprising:
- a processor that performs MAC layer processing and generates a first MAC frame used in common between the first base station and the second base stations;
- and
- a communication processing circuit that transmits the first MAC frame to the second base stations,
- wherein the processor further, on the basis of information for performing carrier sensing from each of the second base stations, selects one of the second base stations that is a transmission destination of the first MAC frame,
- wherein when the information for performing carrier sensing indicates there is a clear channel in only one of the second base stations, the processor selects the one of the second base stations having a clear channel;
- and
- when the information for performing carrier sensing indicates there is a clear channel in at least two of the second base stations, the processor transmits a sounding frame to at least one of the at least two of the second base stations having a clear channel and causes a sounding frame to be transmitted from at least one of the at least two of the second base stations to a terminal, receives, from the at least two of the second base stations, a reception result of a sounding response frame from the terminal, and selects one of the second base stations on the basis of the reception result of the sounding response frame received.
4 more elements
A base station that, in a base station system including a first base station and at least two second base stations, functions as one of the second base stations, the base station comprising:
- a communication processing circuit that receives a first MAC frame from the first base station;
- and
- a processor that performs physical layer processing and generates a wireless signal including the first MAC frame, and transmits the wireless signal generated to a terminal,
- wherein the processor further, on the basis of information for performing carrier sensing from each of the second base stations, selects one of the second base stations that is a transmission destination of the first MAC frame,
- wherein when the information for performing carrier sensing indicates there is a clear channel in only one of the second base stations, the processor selects the one of the second base stations having a clear channel;
- and
- when the information for performing carrier sensing indicates there is a clear channel in at least two of the second base stations, the processor transmits a sounding frame to at least one of the at least two of the second base stations having a clear channel and causes a sounding frame to be transmitted from at least one of the at least two of the second base stations to the terminal, receives, from the at least two of the second base stations, a reception result of a sounding response frame from the terminal, and selects one of the second base stations on the basis of the reception result of the sounding response frame received.
4 more elements
A base station system comprising a first base station and at least two second base stations,
- wherein the first base station includes:
- a first processor that performs MAC layer processing and generates a first MAC frame used in common between the first base station and the second base stations;
- and
- a first communication processing circuit that transmits the first MAC frame to the second base stations, and
- one the at least two second base stations includes:
- a second communication processing circuit that receives the first MAC frame from the first base station;
- and
- a second processor that performs physical layer processing and generates a wireless signal including the first MAC frame, and transmits the wireless signal generated to a terminal,
- wherein the first processor further, on the basis of information for performing carrier sensing from each of the at least two second base stations, selects the one of the at least two second base stations as a transmission destination of the first MAC frame,
- wherein when the information for performing carrier sensing indicates there is a clear channel in only one of the second base stations, the first processor selects the one of the second base stations having a clear channel;
- and
- when the information for performing carrier sensing indicates there is a clear channel in at least two of the second base stations, the first processor transmits a sounding frame to at least one of the at least two of the second base stations having a clear channel and causes a sounding frame to be transmitted from at least one of the at least two of the second base stations to the terminal, receives, from the at least two of the second base stations, a reception result of a sounding response frame from the terminal, and selects one of the second base stations on the basis of the reception result of the sounding response frame received.
9 more elements
A communication method in a base station system comprising a first base station and at least two second base stations, the communication method comprising:
- in the first base station, performing MAC layer processing and generating a first MAC frame used in common between the first base station and the second base stations;
- on the basis of information for performing carrier sensing from each of the at least two second base stations, in the first base station, selecting one of the at least two second base stations as a transmission destination of the first MAC frame;
- transmitting the first MAC frame from the first base station to the second base stations;
- in the second base stations, receiving the first MAC frame from the first base station;
- in the second base stations, performing physical layer processing and generating a wireless signal including the first MAC frame;
- and
- transmitting the wireless signal to a terminal,
- wherein when the information for performing carrier sensing indicates there is a clear channel in only one of the second base stations, selecting the one of the second base stations having a clear channel;
- and
- when the information for performing carrier sensing indicates there is a clear channel in at least two of the second base stations, transmitting a sounding frame to at least one of the at least two of the second base stations having a clear channel and causes a sounding frame to be transmitted from at least one of the at least two of the second base stations to the terminal, receives, from the at least two of the second base stations, a reception result of a sounding response frame from the terminal, and selecting one of the second base stations on the basis of the reception result of the sounding response frame received.
7 more elements
Dependencies are inferred from the claim text.