US 9,544,160 B2Granted

Method for enhanced uplink transmission having low PAPR in LTE-based mobile communication system

AssigneeElectronics and Telecommunications Research Institute

InventorsHee Wook Kim, Kun Seok Kang, Bon Jun Ku, Do Seob Ahn

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Abstract

Provided is a communication method for downlink transmission with a low peak to average power ratio (PAPR) and compatibility with long-term evolution (LTE)-based downlink transmission in an LTE-based mobile communication system in which the performance degradation may occur due to a high PAPR in multi-carrier transmission caused by non-linearity of a power amplifier in a base station including a satellite, to have the effects of supporting a terminal that reuses an existing terrestrial LTE chipset and a terminal that enables downlink reception with a low PAPR with no collision between the terminals, and of implementing an integrated satellite/terrestrial mobile communication system with a minimum change of an existing mobile communication system to ensure economic efficiency.

Claims14

Dependent claims

A downlink transmission method for an integrated terrestrial/satellite mobile communication system, the method comprising:

selecting, by a mobile terminal, a frame;
and
receiving, by the mobile terminal, a first section of the frame that is transmitted using an orthogonal frequency division multiplexing (OFDM) scheme during the transmission of the first section of the frame that is available for downlink signal transmission of terrestrial mobile communication;
and
receiving, by the mobile terminal, a second section of the frame that is transmitted using a discrete Fourier transform spread (DFTS)-OFDM scheme that a discrete Fourier transform (DFT) spreading is interposed between resource mapping and inverse fast Fourier transform (IFFT), the DFTS-OFDM scheme having a lower peak to average power ratio (PAPR) than the OFDM scheme during the transmission of the second section of the frame that is unavailable for the downlink signal transmission of the terrestrial mobile communication,
wherein the frame includes a plurality of first subframes for multicast service and a plurality of second subframes for unicast service.

3 more elements

An integrated terrestrial/satellite mobile communication terminal, comprising:

a control unit to obtain downlink transmission information per section of a frame through a physical broadcasting channel from a base station;
and
a transmitting/receiving unit to recognize communications, based on the downlink transmission information per section of the frame obtained from the control unit, receive a first section of the frame that is transmitted using an orthogonal frequency division multiplexing (OFDM) scheme during the transmission of the first section of the frame that is available for downlink signal transmission of terrestrial mobile communication, and receive a second section of the frame that is transmitted using a discrete Fourier transform spread (DFTS)-OFDM scheme that a discrete Fourier transform (DFT) spreading is interposed between resource mapping and inverse fast Fourier transform (IFFT), the DFTS-OFDM scheme having a lower peak to average power ratio (PAPR) than the OFDM scheme during the transmission of the second section of the frame that is unavailable for the downlink signal transmission of the terrestrial mobile communication,
wherein the frame includes a plurality of first subframes for multicast service and a plurality of second subframes for unicast service.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 14/399,922Filed 11 Dec 2012
Priority: KR 10-2012-00484138 May 2012
Published: US 2015/0103723 A116 Apr 2015
Granted: 10 Jan 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

H04L 12/189
For broadcast or conference , e.g. multicast: in combination with wireless systems
H04B 7/18513
Systems using a satellite or space-based relay: transmission in a satellite or space-based system
H04B 7/18517
Systems using a satellite or space-based relay: transmission equipment in earth stations
H04B 7/18563
Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service: arrangements for interconnecting multiple…