US 9,806,874 B2Granted

Spectrum enhancement and user equipment coexistence through uplink/downlink decoupling for time division duplexing and through non-continuous frame structures for frequency division duplexing

AssigneeApple Inc.

InventorsDawei Zhang, Tarik Tabet, Farouk Belghoul, Huarui Liang

Life of this patent

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Abstract

Mobile devices, base stations, and/or relay stations may implement methods for decreasing required guard bands while also minimizing Adjacent Channel Leakage Ratio, when multiple mobile devices communicate over different respective adjacent specified frequency bands. For communications over at least one specified frequency band of the different respective adjacent frequency bands, a first bandwidth of uplink communications and/or a second bandwidth of downlink communications may be adjusted to differ from each other, and/or a communications bandwidth within the specified frequency band may be adjusted to be of a first size during a first portion of a specified data transmission period and to be of a second size during a second portion of the specified data transmission period, when at least some of the communications over the specified frequency band take place at frequencies adjacent to frequencies at which at least some of the communications take place over another specified frequency band.

Claims20

Dependent claims

A method for conserving bandwidth during transmission of wireless signals in adjacent frequency bands, the method comprising:

establishing communication within a wireless network over at least three different specified frequency bands;
adjusting, for a first specified frequency band of the at least three specified frequency bands, one of a first bandwidth of uplink communications in the first specified frequency band or a second bandwidth of downlink communications in the first specified frequency band, such that the first bandwidth differs from the second bandwidth when at least a first portion of communications over the first specified frequency band takes place at frequencies adjacent to frequencies at which at least a corresponding portion of communications over a second specified frequency band of the at least three different specified frequency bands takes place;
and
adjusting, for a third specified frequency band of the at least three specified frequency bands, for a specified time period, a third bandwidth of communications taking place in the third specified frequency band at frequencies adjacent to frequencies at which at least a second portion of communications over the first specified frequency band takes place, wherein the specified time period corresponds to a communication time period during which the first bandwidth and the second bandwidth are not adjusted.

1 more element

A wireless communication device comprising:

radio circuitry configured to establish communication within a wireless network over a first specified frequency band, a second specified frequency band and a third specified frequency band, wherein the first specified frequency band comprises a first bandwidth of uplink communications and a second bandwidth of downlink communications;
and
a processing element configured to:
adjust one of the first bandwidth or the second bandwidth, such that the first bandwidth differs from the second bandwidth when at least a first portion of communications in the first specified frequency band takes place at frequencies adjacent to frequencies at which at least a corresponding portion of communications over the second specified frequency band takes place;
and
adjust, for a specified time period, the third bandwidth when communications take place in the third specified frequency band at frequencies adjacent to frequencies at which at least a second portion of communications over the first specified frequency band take place, wherein the specified time period corresponds to a communication time period during which the first bandwidth and the second bandwidth are not adjusted.

3 more elements

An apparatus comprising:

a processing element configured to cause a wireless communication device to:
communicate within a wireless network over a first specified frequency band, a second specified frequency band and a third specified frequency band, wherein the first specified frequency band comprises a first bandwidth of uplink communications and a second bandwidth of downlink communications;
adjust one of the first bandwidth or the second bandwidth, such that the first bandwidth differs from the second bandwidth when at least a first portion of communications in the first specified frequency band takes place at frequencies adjacent to frequencies at which at least a corresponding portion of communications over the second specified frequency band takes place;
and
adjust, for a specified time period, the third bandwidth when communications take place in the third specified frequency band at frequencies adjacent to frequencies at which at least a second portion of communications over the first specified frequency band take place, wherein the specified time period corresponds to a communication time period during which the first bandwidth and the second bandwidth are not adjusted.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/690,632Filed 20 Apr 2015 · us provisional application
Priority: 9 May 2014
Published: US 2015/0326378 A112 Nov 2015
Granted: 31 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04L 5/14
Arrangements affording multiple use of the transmission path: two-way operation using the same type of signal, i.e. duplex
H04L 5/0005
Two-dimensional division: time-frequency
H04L 5/0028
Arrangements for dividing the transmission path: variable division
H04L 5/003
Arrangements affording multiple use of the transmission path: arrangements for allocating sub-channels of the transmission path