MOBILE COMMUNICATION METHOD, RADIO BASE STATION, AND RELAY NODE

• US 20120051283A1
• Filed: 06/10/2010
• Published: 03/01/2012
• Est. Priority Date: 06/22/2009
• Status: Abandoned Application

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Takahashi, Hideaki, Hapsari, Wuri Andarmawanti, Umesh, Anil, Iwamura, Mikio, Ishii, Minami
• Application Number:
  US13/257,694
• Publication Number:
  US 20120051283A1
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

A mobile communication method according to the present invention includes the steps of: (A) notifying, from a radio base station (DeNB) to a relay node (RN), a predetermined timing, when setting a connection between the radio base station (DeNB) and the relay node (RN); (B) scheduling, at the radio base station (DeNB), to transmit a downlink signal to the relay node (RN) at the predetermined timing; and (C) scheduling, at the relay node (RN), to transmit a downlink signal at a timing other than the predetermined timing.

Claims

1. A mobile communication method comprising the steps of:

(A) notifying, from a radio base station to a relay node, a transmission timing of an MBSFN subframe, when setting a connection between the radio base station and the relay node;

(B) scheduling, at the radio base station, to transmit a downlink signal to the relay node at the transmission timing of the MBSFN subframe; and

(C) scheduling, at the relay node, to transmit a downlink signal at a timing other than the transmission timing of the MBSFN subframe.

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

the connection is an RRC connection;

and

in the step (A), the radio base station notifies, to the relay node, the transmission timing of the MBSFN subframe by an “

RRC Connection Reconfiguration”

transmitted in a set-up procedure of the RRC connection.

3. A mobile communication method comprising the steps of:

(A) notifying, from a relay node to a radio base station, a transmission timing of an MBSFN subframe, when setting a connection between the radio base station and the relay node;

(B) scheduling, at the radio base station, to transmit a downlink signal to the relay node at the transmission timing of the MBSFN subframe; and

(C) scheduling, at the relay node, to transmit a downlink signal at a timing other than the transmission timing of the MBSFN subframe.

4. The mobile communication method according to claim 3, wherein

the connection is an RRC connection;

and

in the step (A), the relay node notifies, to the radio base station, the transmission timing of the MBSFN subframe by “

RRC RN (UE) Capability Information”

transmitted in a set-up procedure of the RRC connection.

5. (canceled)

6. A radio base station comprising:

a notification unit configured to notify, to a relay node, a transmission timing of an MBSFN subframe, when setting a connection between the radio base station and the relay node; and

a scheduling unit configured to schedule the radio base station to transmit a downlink signal to the relay node at the transmission timing of the MBSFN subframe, wherein the relay node does not schedule to transmit a downlink signal at the transmission timing of the MBSFN subframe.

7. The radio base station according to claim 6, wherein

the connection is an RRC connection;

and

the radio base station comprises a reception unit configured to receive an “

RRC Connection Request”

transmitted in a set-up procedure of the RRC connection, wherein

when a transmission source of the “

RRC Connection Request”

received in the reception unit is the relay node in the set-up procedure of the RRC connection, the notification unit is configured to notify, to the relay node, the transmission timing of the MBSFN subframe by an “

RRC Connection Reconfiguration”

.

8. A radio base station comprising:

an acquisition unit configured to acquire a transmission timing of an MBSFN subframe from a relay node, when setting a connection between the radio base station and the relay node; and

a scheduling unit configured to schedule the radio base station to transmit a downlink signal to the relay node at the transmission timing of the MBSFN subframe, wherein

the relay node does not schedule to transmit a downlink signal at the transmission timing of an MBSFN subframe.

9. The radio base station according to claim 8, wherein

the connection is an RRC connection;

and

the acquisition unit is configured to acquire the transmission timing of the MBSFN subframe from “

RRC RN (UE) Capability Information”

transmitted in a set-up procedure of the RRC connection.

10. (canceled)

11. A relay node comprising:

an acquisition unit configured to acquire a transmission timing of an MBSFN subframe from a radio base station, when setting a connection between the relay node and the radio base station; and

a scheduling unit configured to schedule the relay node to transmit a downlink signal at a timing other than the transmission timing of the MBSFN subframe, wherein the radio base station schedules the relay node to transmit a downlink signal at the transmission timing of the MBSFN subframe.

12. The relay node according to claim 11, wherein

the connection is an RRC connection;

and

the acquisition unit is configured to acquire the transmission timing of the MBSFN subframe from an “

RRC Connection Reconfiguration”

transmitted in a set-up procedure of the RRC connection.

13. The relay node according to claim 11, comprising:

a transmission unit configured to transmit an “

RRC Connection Request”

including information indicating being transmitted by the relay node, in the set-up procedure of the RRC connection.

14. A relay node comprising:

a notification unit configured to notify, to a radio base station, a transmission timing of an MBSFN subframe, when setting a connection between the relay node and the radio base station; and

a scheduling unit configured to schedule the relay node to transmit a downlink signal at a timing other than the transmission timing of the MBSFN subframe, wherein the radio base station schedules the relay node to transmit a downlink signal at the transmission timing of the MBSFN subframe.

15. The relay node according to claim 14, wherein

the connection is an RRC connection;

and

the notification unit is configured to notify, to the radio base station, the transmission timing of the MBSFN subframe by “

RRC RN (UE) Capability Information”

in a set-up procedure of the RRC connection.

16. (canceled)