Base station apparatus, mobile station apparatus, and method of assigning subscarriers
First Claim
1. A base station apparatus assigning a subcarrier in downlink communication under Orthogonal Frequency Division Multiple Access and comprising:
- an obtaining unit that obtains, before downlink communication with a mobile station apparatus, information resulting from carrier sensing by the mobile station apparatus and concerning an available subcarrier;
an information sharing unit that informs an adjacent base station apparatus of the information concerning the available subcarrier, the information concerning the available subcarrier being shared between the base station apparatus and the adjacent base station apparatus; and
a subcarrier setting unit that sets the available subcarrier for the downlink communication before the downlink communication with the mobile station apparatus.
1 Assignment
0 Petitions
Accused Products
Abstract
A base station assigns a subcarrier for downlink communications under Orthogonal Frequency Division Multiple Access. Before downlink communications with a mobile station, based on carrier sensing by the mobile station, the base station detects information concerning an available subcarrier from downlink signals using a modulating unit. The information concerning the available subcarrier is stored in a downlink-information sharing unit and is shared among the base station and the adjacent base stations. A downlink subcarrier setting unit sets the available subcarrier for downlink communications.
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Citations
13 Claims
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1. A base station apparatus assigning a subcarrier in downlink communication under Orthogonal Frequency Division Multiple Access and comprising:
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an obtaining unit that obtains, before downlink communication with a mobile station apparatus, information resulting from carrier sensing by the mobile station apparatus and concerning an available subcarrier; an information sharing unit that informs an adjacent base station apparatus of the information concerning the available subcarrier, the information concerning the available subcarrier being shared between the base station apparatus and the adjacent base station apparatus; and a subcarrier setting unit that sets the available subcarrier for the downlink communication before the downlink communication with the mobile station apparatus. - View Dependent Claims (2, 3, 4, 5)
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6. A base station apparatus assigning a subcarrier in uplink communication under Orthogonal Frequency Division Multiple Access and comprising:
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a detecting unit that performs carrier sensing before uplink communication with a mobile station apparatus and detects an available subcarrier; an information sharing unit that informs an adjacent base station apparatus of information concerning the available subcarrier, the information concerning the available subcarrier being shared between the base station apparatus and the adjacent base station apparatus; and a subcarrier setting unit that sets the available subcarrier for the uplink communication before the uplink communication with the mobile station apparatus. - View Dependent Claims (7, 8, 9)
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10. A mobile station apparatus communicating with a base station apparatus that assigns a subcarrier in uplink communication under Orthogonal Frequency Division Multiple Access, the mobile station apparatus comprising:
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a detecting unit that performs carrier sensing before downlink communication with the base station apparatus and detects an available subcarrier; and an informing unit that inserts information concerning the available subcarrier into an uplink signal to the base station apparatus to inform the base station apparatus of the information. - View Dependent Claims (11)
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12. A method of assigning a subcarrier under Orthogonal Frequency Division Multiple Access and comprising:
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detecting an available subcarrier through carrier sensing by a signal-receiving apparatus that is a base station apparatus or a mobile station apparatus, before communication between the base station apparatus and the mobile station apparatus; sharing information concerning the available subcarrier among the base station apparatus and an adjacent base station apparatus; and assigning the subcarrier to communication between the base station apparatus and the mobile station apparatus before the communication begins. - View Dependent Claims (13)
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Specification