Mobile communication method and radio base station

• US 9,832,768 B2
• Filed: 06/20/2011
• Issued: 11/28/2017
• Est. Priority Date: 06/21/2010
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Takahashi, Hideaki, Nagata, Satoshi
• Primary Examiner(s): Nguyen, Hanh N
• Assistant Examiner(s): Perez, Jose L
• Application Number:
  US13/805,743
• Publication Number:
  US 20130176936A1
• Time in Patent Office: 2,353 Days
• Field of Search: 370354, 370310, 3703102, 370348, 370468, 370492, 370496, 370501, 370278, 370280, 370281, 370315-319, 370328-338, 370350, 370254, 455 631, 4551142, 375346
• CPC Class Codes: H04B 7/15507 Relay station based processing for cell extension or control of coverage area, network planning with network coordinated processing with regard to cell extension H04W16/26; network topologies using dedicated repeater stations H04W84/047; terminal devices adapted for relaying to or from an other terminal H04W88/04
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04L 5/16 Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 36/10 Reselecting an access point controller
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B
• CPC Class Codes: H04W 84/047 using dedicated repeater stations
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

A mobile communication method according to the present invention includes a step of transmitting, by a radio base station DeNB, a first downlink signal in a first subframe to a relay node RN, a step of transmitting, by the relay node RN, a second downlink signal in a second subframe to a mobile station UE, a step of notifying, by the relay node RN, the radio base station DeNB of information indicating “Half duplex inband Relay Node”, and a step of transmitting, by the radio base station DeNB, a transmission timing of R-PDCCH and R-PDSCH in a Un subframe to the relay node RN according to the notification.

Claims

1. A mobile communication method comprising:

a step of transmitting, by a radio base station, a first downlink signal in a first subframe to a relay node;

a step of transmitting, by the relay node, a second downlink signal in a second subframe to a mobile station;

a step of providing, by the relay node, during a relay node attach procedure, information indicating the relay node is a half duplex inband relay node; and

a step of transmitting, by the radio base station, after the relay node attach procedure is completed and after the relay node sets up S1/X2 interfaces, a transmission timing of a physical downlink control channel and a physical downlink shared channel addressed to the relay node in a subframe between the relay node and the radio base station to the relay node according to the information.

2. The mobile communication method according to claim 1, wherein the physical downlink control channel includes a channel for transmitting HARQ-ACK in an uplink.

3. A mobile communication method comprising:

a step of transmitting, by a radio base station, a first downlink signal in a first subframe to a relay node;

a step of transmitting, by the relay node, a second downlink signal in a second subframe to a mobile station;

a step of providing, by the relay node, during a relay node attach procedure, information indicating the relay node is a half duplex inband relay node; and

a step of transmitting, by the radio base station, after the relay node attach procedure is completed and after the relay node sets up S1/X2 interfaces, an arrangement pattern of a reference signal for demodulation addressed to the relay node in a subframe between the relay node and the radio base station to the relay node according to the information.

4. A radio base station, which is used in a mobile communication system in which a relay node is configured to transmit a second downlink signal in a second subframe to a mobile station, comprising:

a transmitter configured to transmit a first downlink signal in a first subframe to the relay node; and

a receiver configured to receive a notification indicating the relay node is a half duplex inband relay node, wherein

when the notification indicating the relay node is a half duplex inband relay node is received from the relay node during a relay node attach procedure, the transmitter is configured to transmit, after the relay node attach procedure is completed and after the relay node sets up S1/X2 interfaces, a transmission timing of a physical downlink control channel and a physical downlink shared channel addressed to the relay node in a subframe between the relay node and the radio base station to the relay node.

5. The radio base station according to claim 4, wherein the physical downlink control channel includes a channel for transmitting HARQ-ACK in an uplink.

6. A radio base station, which is used in a mobile communication system in which a relay node is configured to transmit a second downlink signal in a second subframe to a mobile station, comprising:

a transmitter configured to transmit a first downlink signal in a first subframe to the relay node; and

a receiver configured to receive a notification indicating the relay node is a half duplex inband relay node, wherein

when the notification indicating the relay node is a half duplex inband relay node is received from the relay node during a relay node attach procedure, the transmitter is configured to transmit, after the relay node attach procedure is completed and after the relay node sets up S1/X2 interfaces, an arrangement pattern of a reference signal for demodulation addressed to the relay node.