US 9,960,943 B2Granted

Method and apparatus for reception of control signaling

AssigneeMotorola Mobility LLC

InventorsRavikiran Nory, Vijay Nangia, Ajit Nimbalker

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Abstract

A method and apparatus provide reception of control signaling in a wireless communication network. A first device can communicate with a second device using serving cell operating on an unlicensed carrier. A preamble transmission can be sent to the second device in a first set of at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol starting with a first orthogonal frequency division multiplexing symbol in a subframe sent on the serving cell. The first OFDM symbol can have a first cyclic prefix. A second OFDM symbol can be in the subframe to the second device such that the second OFDM symbol immediately follows the first set of OFDM symbols. Control information can be sent in a second set of OFDM symbols beginning with the second OFDM symbol to the second device. The second set of OFDM symbols can have a second cyclic prefix. The duration of the first cyclic prefix can be larger than the duration of the second cyclic prefix.

Claims25

Dependent claims

A method in a first device, the method comprising:

communicating with a second device using serving cell operating on an unlicensed carrier;
sending a preamble transmission to the second device in a first set of at least one orthogonal frequency division multiplexing symbol starting with a first orthogonal frequency division multiplexing symbol in a subframe sent on the serving cell, the first orthogonal frequency division multiplexing symbol having a first cyclic prefix;
sending a second orthogonal frequency division multiplexing symbol in the subframe to the second device such that the second orthogonal frequency division multiplexing symbol immediately follows the first set of orthogonal frequency division multiplexing symbols;
and
sending control information in a second set of orthogonal frequency division multiplexing symbols beginning with the second orthogonal frequency division multiplexing symbol to the second device, the second set of orthogonal frequency division multiplexing symbols having a second cyclic prefix,
wherein the duration of the first cyclic prefix is larger than the duration of the second cyclic prefix.

3 more elements

An apparatus comprising:

a transceiver that communicates with a second apparatus using a serving cell operating on an unlicensed carrier;
and
a controller coupled to the transceiver, where the controller generates a preamble transmission in a first set of at least one orthogonal frequency division multiplexing symbol starting with a first orthogonal frequency division multiplexing symbol in a subframe transmitted on the serving cell, the first orthogonal frequency division multiplexing symbol having a first cyclic prefix,
wherein the transceiver
sends the preamble transmission to the second apparatus,
sends a second orthogonal frequency division multiplexing symbol in the subframe to the second apparatus such that the second orthogonal frequency division multiplexing symbol immediately follows the first set of orthogonal frequency division multiplexing symbols, and
sends control information in a second set of orthogonal frequency division multiplexing symbols beginning with the second orthogonal frequency division multiplexing symbol to the second apparatus, the second set of orthogonal frequency division multiplexing symbols having a second cyclic prefix, and
wherein the duration of the first cyclic prefix is larger than the duration of the second cyclic prefix.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/482,626Filed 7 Apr 2017 · division
Priority: 1 Feb 2016
Published: US 2017/0222857 A13 Aug 2017
Granted: 1 May 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

H04L 1/0046
Arrangements at the receiver end: code rate detection or code type detection
H04L 1/0045
By using forward error control: arrangements at the receiver end
H04L 1/0072
By using forward error control: error control for data other than payload data, e.g. control data
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

Family

Application15/012,162Parent of this division · filed 1 Feb 2016
US 2017/0222857 A1Pre-grant publication · published 3 Aug 2017
US 9,647,864 B2Parent of this division
US 2016/0301556 A1Published application
US 9,960,943 B2This patent

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