BASE STATION APPARATUS, MOBILE STATION APPARATUS, DISTRIBUTED ANTENNA WIRELESS COMMUNICATIONS SYSTEM, PILOT CHANNEL GENERATION METHOD, SYNCHRONIZATION CHANNEL GENERATION METHOD, AND ANTENNA SELECTION METHOD

• US 20100208656A1
• Filed: 09/01/2008
• Published: 08/19/2010
• Est. Priority Date: 09/04/2007
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Oh, Wahoh
• Granted Patent: US 9,049,601 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04J 13/004 Orthogonal
• CPC Class Codes: H04J 13/18 Allocation of orthogonal codes
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04W 16/12 Fixed resource partitioning
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

The present invention is to provide base station apparatuses and mobile station apparatuses suitable for a configuration of a distributed wireless communications system, configure the distributed wireless communications system, and provide a pilot channel generation method and synchronization generation method suitable for the distributed wireless communications system. Provided are a control signal generating section 13 which generates a plurality of mutually different first pilot signals and a second pilot signal based on control data input from the core network apparatus CN constituting the distributed wireless communications system, combines the first pilot signals and the second pilot signal, and thereby generates specific pilot channels for each of radio access unit apparatuses, and a transmitting section 10 that transmits the specific pilot channels respectively to the radio access unit apparatuses.

Claims

1. A base station apparatus that is applied to a distributed wireless communications system and that controls at least one of radio access unit apparatuses for performing radio communications with mobile station apparatuses, comprising:

a control signal generating section which generates a plurality of mutually different first pilot signals and a second pilot signal based on control data input from a core network apparatus constituting the distributed wireless communications system, combines the first pilot signals and the second pilot signal, and thereby generates specific pilot channels for each of the radio access unit apparatuses; and

a transmitting section that transmits the specific pilot channels respectively to the radio access unit apparatuses.

2. The base station apparatus according to claim 1, wherein the control signal generating section associates a base station apparatus number with a code number of a second synchronization channel between first and second synchronization channels, and thereby generates a synchronization channel

3. The base station apparatus according to claim 1, wherein the control signal generating section associates a radio access unit apparatus number with a code number of a first synchronization channel between first and second synchronization channels, and thereby generates a synchronization channel.

6. A distributed wireless communications system comprising:

at least one radio access unit apparatus for performing radio communications with the mobile station apparatus according to claim 4;

at least one base station apparatus according to claim 2 for controlling the radio access unit apparatus; and

a core network apparatus for controlling the base station apparatus.

7. A distributed wireless communications system comprising:

at least one radio access unit apparatus for performing radio communications with the mobile station apparatus according to claim 5;

at least one base station apparatus according to claim 3 for controlling the radio access unit apparatus; and

a core network apparatus for controlling the base station apparatus.

4. A mobile station apparatus that is applied to a distributed wireless communications system and that performs radio communications with a radio access unit apparatus controlled by a base station apparatus, comprising:

a receiving section that receives a radio signal transmitted from the radio access unit apparatus,

a control signal extracting section that extracts a synchronization channel and a pilot channel from the received radio signal; and

an antenna selecting section which detects a base station apparatus number from a code number of a second synchronization channel in the extracted synchronization channel, while detecting a number of the radio access unit apparatus from a code number of a first pilot signal in the extracted pilot channel, and thereby identifies an antenna number of the radio access unit apparatus.

5. A mobile station apparatus that is applied to a distributed wireless communications system and that performs radio communications with a radio access unit apparatus controlled by a base station apparatus, comprising:

a receiving section that receives a radio signal transmitted from the radio access unit apparatus;

a control signal extracting section that extracts a synchronization channel from the received radio signal; and

an antenna selecting section which detects a number of a radio access unit apparatus from a code number of a first synchronization channel in the extracted synchronization channel, while detecting a base station apparatus number from a code number of a second synchronization channel in the extracted synchronization channel, and thereby identifies an antenna number of the radio access unit apparatus.

8. A pilot channel generation method applied to a distributed wireless communications system, including at least the steps of:

generating a plurality of mutually different first pilot signals and a second pilot signal based on control data input from a core network apparatus constituting the distributed wireless communications system; and

combining the first pilot signals and the second pilot signal, and thereby generating specific pilot channels for each of radio access unit apparatuses that perform radio communications with mobile station apparatuses.

9. A synchronization channel generation method applied to a distributed wireless communications system, wherein a number of a base station apparatus that controls a radio access unit apparatus for performing radio communications with a mobile station apparatus is associated with a code number of a second synchronization channel between first and second synchronization channels based on control data input from a core network apparatus constituting the distributed wireless communications system, and a synchronization channel is thereby generated.

10. The synchronization channel generation method according to claim 9, wherein a radio access unit apparatus number is associated with a code number of the first synchronization channel between the first and second synchronization channels, and a synchronization channel is thereby configured.

11. An antenna selection method in a mobile station apparatus that is applied to a distributed wireless communications system and that performs radio communications with a radio access unit apparatus controlled by a base station apparatus, including at least the steps of:

receiving a radio signal transmitted from the radio access unit apparatus;

extracting a synchronization channel and a pilot channel from the received radio signal;

detecting a base station apparatus number from a code number of a second synchronization channel in the extracted synchronization channel;

detecting a number of the radio access unit apparatus from a code number of the extracted pilot channel; and

identifying an antenna number of the radio access unit apparatus based on the detected radio access unit apparatus number and the detected base station apparatus number.

12. An antenna selection method in a mobile station apparatus that is applied to a distributed wireless communications system and that performs radio communications with a radio access unit apparatus controlled by a base station apparatus, including at least the steps of:

receiving a radio signal transmitted from the radio access unit apparatus;

extracting a synchronization channel from the received radio signal;

detecting a number of a radio access unit apparatus from a code number of a first synchronization channel in the extracted synchronization channel;

detecting a base station apparatus number from a code number of a second synchronization channel in the extracted synchronization channel; and

identifying an antenna number of the radio access unit apparatus based on the detected number of the radio access unit apparatus and the detected base station apparatus number.