Transmitting apparatus, receiving apparatus, and paging information reception method

• US 8,233,459 B2
• Filed: 06/27/2011
• Issued: 07/31/2012
• Est. Priority Date: 05/01/2006
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Higuchi, Kenichi, Sawahashi, Mamoru
• Primary Examiner(s): PATEL, CHANDRAHAS B
• Application Number:
  US13/169,833
• Publication Number:
  US 20110256898A1
• Time in Patent Office: 400 Days
• Field of Search: 370/335, 455/574, 455/458, 455/515
• US Class Current: 370/335
• CPC Class Codes: H04W 68/025 Indirect paging

Abstract

A disclosed transmitting apparatus includes a paging indicator information generating unit generating paging indicator information including a group ID of users who are to receive a paging channel and information indicating a radio resource in which the paging channel is transmitted; and a multiplexing unit multiplexing the paging indicator information.

Claims

1. A transmitting apparatus comprising:

a paging indicator information generating unit generating paging indicator information including a group ID of users who are to receive a paging channel and information indicating a radio resource in which the paging channel is transmitted; and

a multiplexing unit multiplexing the paging indicator information,

wherein, when a number of bits provided for indicating the group ID is k, one group ID is indicated from among 2^k group IDs,

wherein the paging indicator information generating unit generates information indicating a frequency block assigned to the paging channel among frequency blocks dividing a system bandwidth in a manner so that the system bandwidth is divided into continuous sub-carrier frequency blocks,

wherein a number and a location of the frequency blocks assigned to the paging channel are associated in advance; and

wherein the paging indicator information generating unit generates information indicating the number of frequency blocks assigned to the paging channel.

2. The transmitting apparatus according to claim 1, wherein

the multiplexing unit multiplexes the group ID and the information indicating the radio resource with an L1/L2 control channel.

3. The transmitting apparatus according to claim 2, wherein

the paging indicator information generating unit generates information serving as a trigger;

and

the multiplexing unit multiplexes the trigger with a page indicator channel.

4. The transmitting apparatus according to claim 1, wherein

the multiplexing unit multiplexes the group ID and the information indicating the radio resource with a page indicator channel.

5. The transmitting apparatus according to claim 4, wherein

the multiplexing unit multiplexes a sector-common pilot channel for demodulating the paging channel and the paging indicator channel with a sector-specific pilot channel for demodulating an L1/L2 control channel.

6. The transmitting apparatus according to claim 5, wherein

the multiplexing unit multiplexes the sector-common pilot channel and the sector-specific pilot channel with at least one of the same OFDM symbols.

7. The transmitting apparatus according to claim 4, further comprising:

a controlling unit controlling so that a common scrambling code and a common transmission timing are applied to the paging indicator channels and the paging channels between sectors.

8. The transmitting apparatus according to claim 4, further comprising:

a controlling unit controlling so that a sector-specific orthogonal code is multiplied with the paging indicator channel and the paging channel in a frequency domain.

9. The transmitting apparatus according to claim 4, wherein

the multiplexing unit performs a mapping operation with respect to the paging indicator channel and the paging channel in a manner so that the paging indicator channel is separated from the paging channel by at least substantially one sub-frame interval.

10. The transmitting apparatus according to claim 1, wherein

the multiplexing unit multiplexes the group ID with a page indicator channel and multiplexes the information indicating the radio resource with an L1/L2 control channel.

11. The transmitting apparatus according to claim 1, further comprising:

a system information generating unit generating system information items including a number of the group IDs and a correspondence between a number and locations of frequency blocks assigned to the paging channel, wherein

the multiplexing unit multiplexes the system information item with a broadcast channel.

12. A receiving apparatus comprising:

a broadcast information receiving unit receiving a broadcast channel including a number of group IDs of users who are to receive a paging channel and information indicating a correspondence between a number of and locations of frequency blocks assigned to the paging channel;

a paging indicator information receiving unit receiving, based on the information indicating the number of the group IDs, paging indicator information including the group ID of the users who are to receive the paging channel and information indicating a radio resource for the paging channel; and

a paging information receiving unit receiving, based on the group ID, paging channel including indicating a user ID to be called,

wherein, when a number of bits provided for indicating the group ID is k, one group ID is indicated from among 2^k group IDs,

wherein the paging indicator information generating unit generates information indicating a frequency block assigned to the paging channel among frequency blocks dividing a system bandwidth in a manner so that the system bandwidth is divided into continuous sub-carrier frequency blocks,

wherein a number and a location of the frequency blocks assigned to the paging channel are associated in advance; and

wherein the paging indicator information generating unit generates information indicating the number of frequency blocks assigned to the paging channel.

13. The receiving apparatus according to claim 12, wherein

the paging indicator information receiving unit and the paging information receiving unit receive the paging indicator information and the paging information using a soft combining.

14. A paging information reception method comprising:

a broadcast information receiving step of receiving a broadcast channel including a number of group IDs of users who are to receive a paging channel and information indicating a correspondence between a number of and locations of frequency blocks assigned to the paging channel;

a paging indicator information receiving step of receiving, based on the information indicating the number of the group IDs, paging indicator information including the group ID of the users who are to receive the paging channel and information indicating a radio resource for the paging channel; and

a paging information receiving step of receiving, based on the group ID, paging channel including indicating a user ID to be called,

wherein, when a number of bits provided for indicating the group ID is k, one group ID is indicated from among 2^k group IDs,

wherein the paging indicator information generating unit generates information indicating a frequency block assigned to the paging channel among frequency blocks dividing a system bandwidth in a manner so that the system bandwidth is divided into continuous sub-carrier frequency blocks,

wherein a number and a location of the frequency blocks assigned to the paging channel are associated in advance; and

wherein the paging indicator information generating unit generates information indicating the number of frequency blocks assigned to the paging channel.