User device for communicating data and method

Patent metadata

Field	Value
Publication number	US-2016149677-A1
Application number	US-201414904562-A
Country	US
Kind code	A1
Filing date	Jul 16, 2014
Priority date	Aug 6, 2013
Publication date	May 26, 2016
Grant date	—

Abstract

A user device to transmit and receive data to and from an infrastructure equipment via a wireless access interface using a plurality of Orthogonal Frequency Division Multiplexing (OFDM) subcarriers extending across at least a first bandwidth. The infrastructure equipment transmits repeatedly signals representing a same instance of user device payload data in a second bandwidth, the second bandwidth being less than and within the first bandwidth and including a subset of the OFDM subcarriers. The user device is configured to receive one or more of the signals repeatedly transmitted across the second bandwidth and to store in a memory signals representing the repeatedly transmitted signals received across the second bandwidth. The user device is also configured to combine the stored signals and to detect the user device payload data from the combined signals, the user device having been provided with an indication of the second bandwidth.

First claim

1 . A user device arranged to transmit and to receive data to and from an infrastructure equipment via a wireless access interface, the wireless access interface being provided by the infrastructure equipment using a plurality of Orthogonal Frequency Division Multiplexing (OFDM) subcarriers, the plurality of subcarriers extending across at least a first bandwidth, the infrastructure equipment transmitting repeatedly signals representing a same instance of user device payload data in a second bandwidth, the second bandwidth being less than and within the first bandwidth and including a subset of the OFDM subcarriers, and user device is configured
to receive one or more of the signals repeatedly transmitted across the second bandwidth, to store in a memory signals representing the repeatedly transmitted signals received across the second bandwidth, to combine the stored signals, and to detect the user device payload data from the combined signals, the user device having been provided with an indication of the second bandwidth.

2 . A user device as claimed in claim 1 , wherein the infrastructure equipment transmits repeatedly signals representing a same instance of user device control data in the first bandwidth, the user device control data providing an indication of a location of the signals representing the user device payload data in the second bandwidth, and the user device is configured
to receive one or more of the repeatedly transmitted signals representing user device control data across the first bandwidth, to store in the memory signals representing the repeatedly transmitted received across the first bandwidth, to combine the stored signals representing the repeatedly transmitted signals received across the first bandwidth, and to detect the user device control data from the combined signals representing the repeatedly transmitting signals received across the first bandwidth, the detection of the user device payload data from the combined signals received across the second bandwidth being based on the indication of the location of the signals representing the user device payload data in the second bandwidth.

3 . A user device as claimed in claim 1 , wherein the wireless access interface provided by the plurality of OFDM subcarriers is divided into a plurality of time periods and the repeated signals representing the user device payload data are transmitted in a same set of resources of the wireless access interface in a first time period and in a second time period, and the user device is configured to receive the user device payload data in the same set of resources of the wireless access interface in the first time period and in the second time period.

4 . A user device as claimed in claim 2 , wherein the user device is configured to receive the indication of the second bandwidth from the infrastructure equipment prior to receiving the repeated transmissions of the signals representing the user device control data.

5 . A user device as claimed in claim 1 , wherein the user device is configured to receive user device payload data within a virtual carrier of a predetermined bandwidth, the second bandwidth being approximately equal to the predetermined bandwidth, and the predetermined bandwidth includes a set of the OFDM subcarriers that is substantially similar to the OFDM subcarriers that form the subset of the OFDM subcarriers included in the second bandwidth.

6 . A user device as claimed in claim 2 , wherein a number of repeated signals combined to detect the user device payload data is greater than a number of repeated signals combined to detect the user device control data.

7 . A user device as claimed in claim 1 , wherein the user device is compliant with 3GPP LTE.

8 . A user device as claimed in claim 1 , wherein the user device is configured to combine the stored signals in accordance with an incremental redundancy repetition scheme or a chase combining scheme.

9 . A method of receiving data at a user device arranged to transmit and to receive data to and from an infrastructure equipment via a wireless access interface, the wireless access interface being provided by the infrastructure equipment using a plurality of Orthogonal Frequency Division Multiplexing (OFDM) subcarriers, the plurality of subcarriers extending across at least a first bandwidth, the infrastructure equipment repeatedly transmitting signals representing a same instance of user device payload data in a second bandwidth, the second bandwidth being less than and within the first bandwidth and including a subset of the OFDM subcarriers, the method comprising
receiving one or more of the repeatedly transmitted signals across the second bandwidth, storing in a memory signals representing the repeatedly transmitted signals received across the second bandwidth, combing the stored signals, and detecting the user device payload data from the combined signals, the user device having been provided with an indication of the second bandwidth.

10 . A method as claimed in claim 9 , wherein the infrastructure equipment transmits repeatedly signals representing a same instance of user device control data in the first bandwidth, the user device control data providing an indication of a location of the signals representing the user device payload data in the second bandwidth, the method comprising
receiving one or more of the repeatedly transmitted signals representing user device control data across the first bandwidth, storing in the memory signals representing the repeatedly transmitted received across the first bandwidth, combining the stored signals representing the repeatedly transmitted signals received across the first bandwidth, and detecting the user device control data from the combined signals representing the repeatedly transmitting signals received across the first bandwidth, the detection of the user device payload data from the combined signals received across the second bandwidth being based on the indication of the location of the signals representing the user device payload data in the second bandwidth.

11 . A method as claimed in claim 9 , wherein the wireless access interface provided by the plurality of OFDM subcarriers is divided into a plurality of time periods and the repeated signals representing the user device payload data are transmitted in a same set of resources of the wireless access interface in a first time period and in a second time period, the method comprising
receiving the user device payload data in the same set of resources of the wireless access interface in the first time period and in the second time period.

12 . A method as claimed in claim 10 , the method comprising
receiving the indication of the second bandwidth from the infrastructure equipment prior to receiving the repeated transmissions of the signals representing the user device control data.

13 . A method as claimed in claim 9 , the method comprising
receiving user device payload data within a virtual carrier of a predetermined bandwidth, the second bandwidth being approximately equal to the predetermined bandwidth, and the predetermined bandwidth includes a set of the OFDM subcarriers that is substantially similar to the OFDM subcarriers that form the subset of the OFDM subcarriers included in the second bandwidth.

14 . A user device as claimed in claim 10 , the method comprising combining a greater number of repeated signals to detect the user device payload data than to detect the user device control data.

15 . (canceled)

Assignees

• Sony Corp

Inventors

• Morioka Yuichi

Classifications

• H04W72/51

  based on terminal or device properties · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L1/02

  by diversity reception · CPC title

• H04W4/70

  Services for machine-to-machine communication [M2M] or machine type communication [MTC] · CPC title

• H04L1/04 Primary

  using frequency diversity · CPC title