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US 7,689,186 B2Granted
Frequency band allocation device and method
AssigneeNtt Docomo, Inc.
InventorsNaoto Matoba, Masashige Shirakabe, Takatoshi Sugiyama, Hitoshi Yoshino
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Abstract
A frequency band allocation device is disclosed. The frequency band allocation device comprises a frequency band selection unit for selecting usable frequency bands from a dedicated frequency band, a registered frequency band and an unlicensed frequency band; and a frequency band allocation unit for allocating a frequency band out of the selected usable frequency bands to a user, so as to satisfy user required QoS and maximize system frequency utilization factor.
Claims7
A frequency band allocation device, comprising:
- a frequency band selection unit for selecting usable frequency bands from a dedicated frequency band, a registered frequency band, and an unlicensed frequency band;
- and
- a frequency band allocation unit for allocating a frequency band out of the selected usable frequency bands to a user, so as to satisfy user required QoS and maximize system frequency utilization factor,
- wherein the frequency band allocation unit allocates plural usable frequency bands to one user when no one continuous frequency band satisfies the user QoS, and wherein when a broadband high frequency band and a narrowband low frequency band can be utilized, the frequency band allocation unit allocates an uplink control channel, downlink control channel and an uplink data channel to the narrowband low frequency band, but not to the broadband high frequency band, and allocates a downlink data channel to the broadband high frequency band, but not to the narrowband low frequency band.
1 more element
A frequency band allocation method, comprising:
- selecting usable frequency bands from a dedicated frequency band, a registered frequency band, and an unlicensed frequency band;
- allocating a frequency band out of the selected usable frequency bands to a user, so as to satisfy user required QoS and maximize system frequency utilization factor;
- allocating plural usable frequency bands to one user when no one continuous frequency band satisfies the user required QoS;
- and
- allocating an uplink control channel, downlink control channel, and an uplink data channel to a narrowband low frequency band, but not to a broadband high frequency band, and allocating a downlink data channel to the broadband high frequency band, but not to the narrowband low frequency band, when the broadband high frequency band and the narrowband low frequency band can be utilized.
2 more elements
Dependencies are inferred from the claim text.