# US 2014/0153525 A1 · Communications apparatus and communications system using multicarrier transmission mode

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- Number: US 2014/0153525 A1
- Document ID: US20140153525A1
- Status: Published application
- Kind: A1
- Application number: 14/175,564
- Filed: 2014-02-07
- Published: 2014-06-05
- Earliest claimed: 2004-10-29
- Assignees: Fujitsu Limited
- Applicants: Fujitsu Limited
- Inventors: Takayoshi ODE; Yoshihiro Kawasaki; Kazuo Kawabata
- Web page: https://patentgrep.com/patent/US20140153525A1

## CPC

- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 27/261: {Details of reference signals}
- H04W 28/26: Resource reservation
- H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00)
- H04W 72/04: Wireless resource allocation
- H04W 72/044: based on the type of the allocated resource
- H04W 72/20: Control channels or signalling for resource management
- H04L 5/00: Arrangements affording multiple use of the transmission path
- H04W 72/00: Local resource management
- H04W 88/08: Access point devices
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A base station in a communications system for exchange of information, includes, a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data information with a mobile station; a transmitter configured to transmit the frequency band information, using a specific frequency band which is set from among a plurality of frequency band assigned to the communications system, and to transmit data information by using at least one frequency band set from among said plurality of frequency bands; wherein at least one frequency band set from among said plurality of frequency bands, other than the specific frequency band, is made variable, wherein at the time of establishing the wireless channel, the frequency band usable by the mobile station is restricted, at least one frequency band, other than the specific frequency band, are dynamically assigned within that restricted frequency band.

## Claims

### Claim 1

A base station accommodated in a communications system for exchange of information with a mobile station by a multicarrier transmission mode, the base station comprising:
a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data information with a mobile station; and
a transmitter configured to transmit the frequency band information by using a specific frequency band which is set from among a plurality of frequency band assigned to the communications system, and to transmit data information by using at least one frequency band set from among said plurality of frequency bands; wherein
the frequency band set as said at least one frequency band set from among said plurality of frequency bands, other than the specific frequency band, is made variable, wherein at the time of establishing the wireless channel, the frequency band usable by the mobile station is restricted, and said at least one frequency band, other than the specific frequency band, are dynamically assigned within that restricted frequency band.

### Claim 2 (depends on 1)

The base station as set forth in claim 1, wherein
the setting information of the frequency band to be set as said at least one frequency band, other than the specific frequency band, is notified to the receiver in advance.

### Claim 3 (depends on 1)

The base station as set forth in claim 1, wherein,
for each of said plurality of frequency bands, at least one of information of a frequency band identification number, used/not used state as at least one frequency band and current status maintained is encoded and transmitted to the mobile station.

### Claim 4

A mobile station accommodated in a communications system for exchange of information with a base station by a multicarrier transmission mode, the mobile station comprising:
a receiver configured to receive frequency band information indicating which frequency band is to be used for transmission of data information with the base station by using a specific frequency band which is set from among a plurality of frequency band assigned to the communications system, and to receive data information by using at least one frequency band set from among said plurality of frequency bands,
wherein the frequency band set as said at least one frequency band set from among said plurality of frequency bands, other than the specific frequency band, is made variable, wherein at the time of establishing the wireless channel, the frequency band usable by the mobile station is restricted, and said at least one frequency band, other than the specific frequency band, are dynamically assigned within that restricted frequency band.

### Claim 5 (depends on 4)

The base station as set forth in claim 4, wherein
the setting information of the frequency band to be set as said at least one frequency band, other than the specific frequency band, is notified from the base station in advance.

### Claim 6 (depends on 4)

The mobile station as set forth in claim 4, wherein,
for each of said plurality of frequency bands, at least one of information of a frequency band identification number, used/not used state as at least one frequency band and current status maintained is encoded and received from the base station.