BASE STATION, MOBILE STATION AND COMMON INFORMATION COMMUNICATING METHOD

• US 20110110321A1
• Filed: 04/23/2009
• Published: 05/12/2011
• Est. Priority Date: 04/28/2008
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Kishiyama, Yoshihisa, Tanno, Motohiro, Sawahashi, Mamoru
• Granted Patent: US 8,958,374 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A base station for transmitting common information which is used in common by plural mobile stations includes a common information generating unit configured to generate the common information; a lower-layer control information generating unit configured to generate lower-layer control information indicating a radio resource where the common information is to be placed; a multiplexing unit configured to multiplex the lower-layer control information and the common information into one or more frequency blocks among a plurality of frequency blocks included within a system bandwidth, the system bandwidth being divided into the plurality of frequency blocks each corresponding to a minimum value of maximum transmission and reception bandwidths used by the plural mobile stations; and a transmitting unit configured to transmit the multiplexed lower-layer control information and common information.

Claims

1. A base station for transmitting common information which is used in common by plural mobile stations, comprising:

a common information generating unit configured to generate the common information;

a lower-layer control information generating unit configured to generate lower-layer control information indicating a radio resource where the common information is to be placed;

a multiplexing unit configured to multiplex the lower-layer control information and the common information into one or more frequency blocks among a plurality of frequency blocks included within a system bandwidth, the system bandwidth being divided into the plurality of frequency blocks each corresponding to a minimum value of maximum transmission and reception bandwidths used by the plural mobile stations; and

a transmitting unit configured to transmit the multiplexed lower-layer control information and common information.

2. The base station as claimed in claim 1, further comprising:

a spreading unit configured to spread the lower-layer control information and the common information with different spreading processes depending on the frequency blocks.

3. The base station as claimed in claim 1, wherein:

the multiplexing unit multiplexes the common information and the lower-layer control information into different frequency blocks.

4. The base station as claimed in claim 3, wherein:

the multiplexing unit multiplexes the lower-layer control information into a first subframe and multiplexes the common information into a second subframe after the first subframe.

5. A mobile station for receiving from a base station common information which is used in common by plural mobile stations, comprising:

a lower-layer control information receiving unit configured to receive lower-layer control information which is multiplexed into one or more frequency blocks among a plurality of frequency blocks included within a system bandwidth, the system bandwidth being divided into the plurality of frequency blocks each corresponding to a minimum value of maximum transmission and reception bandwidths used by the plural mobile stations; and

a common information receiving unit configured to receive the common information based on the lower-layer control information.

6. The mobile station as claimed in claim 5, further comprising:

a de-spreading and combining unit configured to de-spread and combine the lower-layer control information and the common information, which are received in different frequency blocks, with different de-spreading processes.

7. A mobile station for receiving from a base station common information which is used in common by plural mobile stations, comprising:

a lower-layer control information receiving unit configured to receive lower-layer control information;

a radio resource control unit configured to change a radio resource to receive the common information based on the lower-layer control information; and

a common information receiving unit configured to receive the common information with the changed radio resource.

8. A common information communicating method for transmitting from a base station to a mobile station common information which is used in common by plural mobile stations, comprising the steps of:

generating, by the base station, the common information;

generating, by the base station, lower-layer control information indicating a radio resource where the common information is to be placed;

multiplexing, by the base station, the lower-layer control information and the common information into one or more frequency blocks among a plurality of frequency blocks included within a system bandwidth, the system bandwidth being divided into the plurality of frequency blocks each corresponding to a minimum value of maximum transmission and reception bandwidths used by the plural mobile stations;

transmitting, by the base station, the multiplexed lower-layer control information and common information;

receiving, by the mobile station, the lower-layer control information; and

receiving, by the mobile station, the common information based on the lower-layer control information.