Radio communication system, base transceiver station, and extension device

• US 20070232353A1
• Filed: 06/20/2006
• Published: 10/04/2007
• Est. Priority Date: 03/29/2006
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Motohashi, Kayo, Miyazaki, Nao, Kuniyoshi, Hidekazu, Hashimoto, Masanori, Tezuka, Yasuo, Maruyama, Satoshi, Kanda, Takashi, Yokosawa, Tadanori
• Granted Patent: US 8,131,309 B2
• Time in Patent Office: Days
• US Class Current: 455/557
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 88/085 Access point devices with remote components
• CPC Class Codes: H04W 92/12 between access points and access point controllers

Abstract

A plurality of base transceiver stations and at least one extension device are connected, via an IP network that uses internet protocol. The extension device shares resources of the base transceiver stations by arbitrary changing a connection relationship between the base transceiver stations and the extension devices. When a mobile terminal communicates with a core network, the extension device uses the resources of at least one base transceiver stations according to fluctuation in the amount of traffic.

Claims

1. A radio communication system comprising:

a plurality of radio communication devices each of which has resources used to perform communication processing when a mobile terminal communicates with a core network;

at least one extension device having a function of performing radio communication with the mobile terminal; and

an internet protocol network, to which the radio communication devices and the extension device are connected, and in which a connection relationship between the radio communication devices and the extension device is arbitrarily changed, wherein

the extension device is configured to use the resources of more than one of the radio communication devices when the mobile terminal communicates with the core network.

2. The radio communication system according to claim 1, further comprising a control device configured to control the radio communication devices, wherein

the control device is configured to assign a plurality of channels established between the mobile terminal and the core network, to the resources of more than one of the radio communication devices, and to handle pieces of information processed by the resources of more than one of the radio communication devices as information of a single mobile terminal, when the mobile terminal communicates with the core network.

3. The radio communication system according to claim 2, wherein the control device is configured to divide, into a plurality of groups, the radio communication devices in subordination to the control device to manage the radio communication devices, and to assign the channels to resources of radio communication devices that belong to an identical group from among the groups.

4. The radio communication system according to claim 2, wherein the control device is configured to divide, into a plurality of groups, the radio communication devices in subordination to the control device to manage the radio communication devices, and to assign the channels to resources of radio communication devices that belong to different groups.

5. The radio communication system according to claim 2, wherein

when the extension device is provided in plurality, the radio communication devices are configured to divide, into a plurality of groups, the extension devices to manage the extension devices, and

the control device is configured to assign the channels to resources of at least two radio communication devices that are linked to an identical group from among the groups.

6. The radio communication system according to claim 1, wherein

when the mobile terminal communicates with the core network, one of the radio communication devices assigns a part of a plurality of channels established between the mobile terminal and the core network, to resources thereof, and to transfer a resource assignment instruction to another of the radio communication devices, and

the radio communication device that receives the resource assignment instruction assigns channels other than the some from among the channels, to resources thereof.

7. The radio communication system according to claim 6, wherein

the radio communication devices are divided into a plurality of groups to be managed, and

the channels are assigned to resources of radio communication devices that belong to an identical group from among the groups.

8. The radio communication system according to claim 6, wherein

the radio communication devices are divided into a plurality of groups to be managed, and

the channels are assigned to resources of radio communication devices that belong to different groups.

9. The radio communication system according to claim 6, wherein when the extension device is provided in plurality, the radio communication devices are configured to divide the extension devices into a plurality of groups to manage the extension devices, and to assign the channels to resources of at least two radio communication devices that are linked to an identical group from among the groups.

10. The radio communication system according to claim 6, wherein the radio communication devices are configured to exchange control information among the radio communication devices via the internet protocol network.

11. A radio communication device used in the radio communication system according to claim 2, the radio communication device comprising:

an interface to connect the radio communication device to the internet protocol network; and

a base band processing unit configured to perform an encoding process on transmission data and a decoding process on reception data.

12. A radio communication device used in the radio communication system according to claim 6, the radio communication device comprising:

an interface to connect the radio communication device to the internet protocol network;

a base band processing unit configured to perform an encoding process on transmission data and a decoding process on reception data; and

a bypass processing unit to communicate with another radio communication device via the internet protocol network.

13. A radio communication device used in the radio communication system according to claim 1, the radio communication device comprising:

an interface to connect the radio communication device to the internet protocol network;

a base band processing unit configured to perform an encoding process on transmission data and a reverse-spreading process and a decoding process on reception data;

a spreading processing unit configured to perform a spreading process on the transmission data; and

a receiving unit configured to perform a reception processing on the reception data.

14. An extension device used in the radio communication system according to claim 2, the extension device comprising:

an internet protocol interface to connect the extension device to the internet protocol network;

a radio transceiving unit configured to perform radio communication with the mobile terminal;

a spreading processing unit configured to perform a spreading process on transmission data; and

a receiving unit configured to perform a reception process and a reverse-spreading process on reception data.

15. An extension device used in the radio communication system according to claim 6, the extension device comprising:

an internet protocol interface to connect the extension device to the internet protocol network;

a radio transceiving unit configured to perform radio communication with the mobile terminal;

a spreading processing unit configured to perform a spreading process on transmission data; and

a receiving unit configured to perform a reception process and a reverse-spreading process on reception data.

16. An extension device used in the radio communication system according to claim 1, the extension device comprising:

an internet protocol interface to connect the extension device to the internet protocol network; and

a radio transceiving unit configured to perform radio communication with the mobile terminal.