US 10,374,770 B2Granted

Method, apparatus and system for uplink information demodulation

AssigneeHuawei Technologies Co., Ltd.

InventorsJiafeng Shao, Sha Ma, Chaojun Li

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Abstract

Embodiments of the present disclosure provide an uplink information demodulation method, an apparatus, and an uplink information demodulation system. and relate to the field of communications technologies. After an MCS index is selected for a terminal device, reduction processing is performed on the MCS index according to a preset MCS index reduction exponent, a reduced MCS index is indicated to the terminal device, frequency offset estimation is performed on the terminal device by using a recorded historical frequency offset value, and a PUSCH sent by the terminal device according to the reduced MCS index is demodulated after the frequency offset estimation. A frequency offset value is determined by using the prerecorded historical frequency offset value, so that the frequency offset value does not need to be determined in an existing manner of adding a DM-RS symbol to a 0.5-millisecond TTI.

Claims17

Dependent claims

An uplink information demodulation method, wherein the method comprises:

selecting, by a base station, a first modulation and coding scheme (MCS) index for a terminal device according to channel quality information of the terminal device and/or a received target block error rate (BLER) of a physical uplink shared channel (PUSCH) of the terminal device;
determining, by the base station, a second MCS index according to an MCS index reduction value and the first MCS index, wherein the MCS index reduction value is used to perform reduction processing on the first MCS index to obtain the second MCS index;
sending, by the base station, the second MCS index to the terminal device;
performing, by the base station, frequency offset calibration on a frequency of the terminal device according to a historical frequency offset value of the terminal device, wherein the historical frequency offset value is a frequency offset value of the terminal device that is stored in the base station;
and
receiving, by the base station, uplink information sent by the terminal device according to the second MCS index, and demodulating the uplink information according to a frequency obtained after the frequency offset calibration.

3 more elements

A base station, wherein the base station comprises a processor, a transmitter and a receiver, wherein

the processor is configured to:
select a first modulation and coding scheme (MCS) index for a terminal device according to channel quality information of the terminal device and/or a received target block error rate (BLER) of a physical uplink shared channel (PUSCH) of the terminal device;
determine a second MCS index according to an MCS index reduction value and the first MCS index, wherein the MCS index reduction value is used to perform reduction processing on the first MCS index to obtain the second MCS index;
perform frequency offset calibration on a frequency of the terminal device according to a historical frequency offset value of the terminal device, wherein the historical frequency offset value is a frequency offset value of the terminal device that is stored in the base station;
and demodulate the uplink information according to a frequency obtained after the frequency offset calibration;
the transmitter is configured to send the second MCS index to the terminal device;
and
the receiver is configured to receive uplink information sent by the terminal device according to the second MCS index.

5 more elements

A terminal device, wherein the terminal device comprises a transmitter and a receiver, wherein

the receiver is configured to receive a second modulation and coding scheme (MCS) index, wherein the second MCS (index) is obtained after a base station performs reduction processing on a first MCS index according to an MCS index reduction value, and the first MCS index is selected by the base station according to channel quality information of the terminal device and/or a received target block error rate (BLER) of a physical uplink shared channel (PUSCH) of the terminal device;
and
the transmitter is configured to send uplink information according to the second MCS index.

Dependencies are inferred from the claim text.

Facts

Application: 15/919,687Filed 13 Mar 2018 · continuation
Priority: 14 Sep 2015
Published: US 2018/0205517 A119 Jul 2018
Granted: 6 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

H04L 5/0051
Allocation of pilot signals, i.e. of signals known to the receiver: of dedicated pilots, i.e. pilots destined for a single user or terminal
H04L 1/0025
Characterised by the signalling: transmission of mode-switching indication
H04L 1/0039
Arrangements specific to the receiver: other detection of signalling, e.g. detection of TFCI explicit signalling
H04L 1/1812
Automatic repetition systems, e.g. Van Duuren systems: hybrid protocols; Hybrid automatic repeat request [HARQ]

Family

PCT/CN2015/089502Parent of this continuation · filed 14 Sep 2015
US 2018/0205517 A1Pre-grant publication · published 19 Jul 2018
US 10,374,770 B2This patent

From the US filing history. Foreign family members aren’t listed.

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