POWER COMPENSATION METHOD, BASE STATION, AND TERMINAL EQUIPMENT

• US 20140119322A1
• Filed: 01/02/2014
• Published: 05/01/2014
• Est. Priority Date: 07/15/2011
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: WANG, Yi, ZHANG, Yuantao, ZHOU, Hua
• Granted Patent: US 9,591,629 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A power compensation method, base station and user equipment. The method includes: transmitting, by a base station, when an expanded UE-specific PDCCH is amplitude phase keying modulated, a first ratio of the EPRE of the expanded UE-specific downlink control channel to the EPRE of a DM-RS in a first time slot occupied by the expanded UE-specific PDCCH, so that the terminal equipment performs power compensation in decoding the received data transmitted by the base station according to the first ratio, thereby ensuring correct demodulation of the received data by the terminal equipment.

Claims

1. A base station, comprising:

a first resource configurator, configured to expand a UE-specific downlink control channel region to a downlink shared channel region, the expanded UE-specific downlink control channel region being configured in a first time slot of one or more resource block pairs;

a first judger, configured to judge whether the modulation mode of the expanded UE-specific downlink control channel is amplitude phase keying; and

a first compensation information transmitter, configured to transmit to a terminal, when the judging result of the first judger is that the expanded UE-specific downlink control channel is amplitude phase keying modulated, a first ratio of the EPRE of the expanded UE-specific downlink control channel to the EPRE of a demodulation reference signal in the first time slot occupied by the expanded UE-specific downlink control channel, the first ratio being provided to the terminal for power compensation when decoding the received downlink control channel data transmitted by the base station.

2. The base station according to claim 1, wherein the base station further comprises:

a modulation information transmitter, configured to transmit to the terminal information including a modulation mode.

3. The base station according claim 1, wherein part or whole of the downlink shared channel region is configured in the region of a second time slot of the one or more resource block pairs;

or the downlink shared channel region is not configured at the one or more resource block pairs.

4. A base station, comprising:

a second resource configurator, configured to expand a UE-specific downlink control channel region to a downlink shared channel region, the expanded UE-specific downlink control channel region and the downlink shared channel region multiplexing one or more resource block pairs, and being configured respectively in the regions of a first time slot and a second time slot of the resource block pairs;

a second judger, configured to judge whether the power of a demodulation reference signal in the first time slot occupied by the expanded UE-specific downlink control channel is identical to the power of a demodulation reference signal in the second time slot occupied by the downlink shared channel; and

a second compensation information transmitter, configured to transmit to a terminal, when the judging result of the second judger is that the power of the demodulation reference signal in the first time slot occupied by the expanded UE-specific downlink control channel is different from the power of the demodulation reference signal in the second time slot occupied by the downlink shared channel, a second ratio of the EPRE of the demodulation reference signal in the first time slot occupied by the expanded UE-specific downlink control channel to the EPRE of the demodulation reference signal in the second time slot, the second ratio being provided to the terminal for power compensation when performing channel estimation to the received demodulation reference signal.

5. A terminal, comprising:

a compensation information receiver, configured to receive, a fifth ratio transmitted by a base station, of the EPRE of an expanded UE-specific downlink control channel to the EPRE of a demodulation reference signal in a first time slot occupied by the expanded UE-specific downlink control channel, or receive a sixth ratio transmitted by the base station, of the EPRE of a demodulation reference signal in the first time slot occupied by the expanded UE-specific downlink control channel to the EPRE of a demodulation reference signal in the second time slot, or receive a power compensation value transmitted by the base station; and

a power compensator, configured to perform power compensation, by using the received fifth ratio, the sixth ratio, or the power compensation value, when decoding the received downlink control channel data or downlink shared channel data transmitted by the base station, or when performing channel estimation to the received demodulation reference signal.