Mobile Communication System, Base Station Device and Frequency Allocation Method for Mobile Communication System

• US 20100027482A1
• Filed: 04/27/2007
• Published: 02/04/2010
• Est. Priority Date: 04/27/2006
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Murakami, Youhei, Nakano, Takeshi, Ootsuki, Yutaka, Nishikido, Masamitsu
• Granted Patent: US 8,553,613 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

In a base station device 12 of an OFDMA mobile communication system, a frequency band storage unit 22 stores multiple frequency bands allocatable to mobile station devices, respectively, in association with predetermined conditions related to communication quality. A communication quality acquisition unit 37 acquires communication quality in communication with each of the mobile station devices. A frequency allocator 24 selects any one of the frequency bands from the frequency band storage unit 22 on the basis of the communication quality acquired by the communication quality acquisition unit 37, and notifies the mobile station device of channel information indicating the selected frequency band. Then, the mobile station device communicates with the base station device 12 in the frequency band indicated by the channel information notified by the frequency allocator 24 in the base station device 12.

Claims

1. A mobile communication system comprising:

a plurality of mobile station devices; and

a base station device for performing communication with each of the mobile station devices by orthogonal frequency division multiplexing in a predetermined frequency band, wherein

the base station device includes;

a frequency band storage unit configured to store a plurality of frequency bands allocatable to each of the mobile station devices, in association with predetermined conditions related to communication quality;

a communication quality acquisition unit configured to acquire communication quality in communication with each of the mobile station devices; and

a frequency allocator configured to select a frequency band to be allocated to each of the mobile station devices from the frequency band storage unit on the basis of the communication quality acquired by the communication quality acquisition unit, and to notify the mobile station device of channel information indicating the selected frequency band, and

each of the mobile station devices communicates with the base station device in the frequency band indicated by the channel information notified by the frequency allocator.

2. The mobile communication system according to claim 1, wherein

a guard band having a predetermined width according to the communication quality is provided between the frequency bands stored in the frequency band storage unit.

3. The mobile communication system according to any one of claims 1 and 2, wherein

the communication quality acquisition unit acquires a difference in magnitude between a desired signal level and an interference signal level according to a received signal in a frequency band allocated to each of the mobile station devices.

4. The mobile communication system according to any one of claims 1 and 2, wherein

the communication quality acquisition unit acquires a frequency difference between a frequency band allocated to each of the mobile station devices and a frequency band of a signal received from the mobile station device.

5. A base station device for performing communication with a plurality off mobile station devices by orthogonal frequency division multiplexing in predetermined frequency bands, the base station device comprising:

a frequency band storage unit configured to store a plurality of frequency bands allocatable to each of the mobile station devices, in association with predetermined conditions related to communication quality;

a communication quality acquisition unit configured to acquire communication quality in communication with each of the mobile station devices; and

a frequency allocator configured to select a frequency band to be allocated to each of the mobile station devices from the frequency band storage unit on the basis of the communication quality acquired by the communication quality acquisition unit, and to notify the mobile station device of channel information indicating the selected frequency band.

6. A frequency allocation method for a mobile communication system including a plurality of mobile station devices and a base station device for performing communication with each of the mobile station devices by orthogonal frequency division multiplexing in a predetermined frequency band, the frequency allocation method comprising:

on a step of storing, in the base station device, a plurality of frequency bands allocatable to each of the mobile station devices in a frequency hand storage unit, in association with predetermined conditions related to communication quality;

a communication quality acquisition step of acquiring, in the base station device, communication quality in communication with each of the mobile station devices;

a frequency allocation step of selecting, in the base station device, a frequency band to be allocated to each of the mobile station devices from the frequency band storage unit on, the basis of the communication quality acquired in the communication quality acquisition step, and of notifying the mobile station device of channel information indicating the selected frequency band; and

a step of communicating, in each of the mobile station devices, with the base station device in the frequency band indicated by the channel information notified in the frequency allocation step.