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

• US 9,806,874 B2
• Filed: 04/20/2015
• Issued: 10/31/2017
• Est. Priority Date: 05/09/2014
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Zhang, Dawei, Tabet, Tarik, Belghoul, Farouk, Liang, Huarui
• Primary Examiner(s): Pham, Chi H
• Assistant Examiner(s): Rivas, Raul
• Application Number:
  US14/690,632
• Publication Number:
  US 20150326378A1
• Time in Patent Office: 925 Days
• Field of Search: None
• CPC Class Codes: H04L 27/368 adaptive predistortion
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/0028 Variable division signaling therefor H04L5/0092
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 76/14 Direct-mode setup

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.

Claims

1. 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.

2. The method of claim 1, further comprising at least one of:

performing uplink communications over the first specified frequency band according to the first bandwidth;

or

performing downlink communications over the first specified frequency band according to the second bandwidth.

3. The method of claim 1, wherein adjusting the one of the first bandwidth of uplink communications in the first specified frequency band or the second bandwidth of downlink communications in the first specified frequency band comprises one of:

decreasing the first bandwidth when the second bandwidth is unchanged;

or

decreasing the second bandwidth when the first bandwidth is unchanged.

4. The method of claim 1, wherein the first specified frequency band is a time division duplex (TDD) frequency band, the second specified frequency band is a first frequency division duplex (FDD) frequency band, and the third specified frequency band is a second FDD frequency band.

5. The method of claim 4, wherein adjusting the one of the first bandwidth of uplink communications in the first frequency band or the second bandwidth of downlink communications in the first frequency band comprises one of:

decreasing the second bandwidth when at least a portion of downlink communications over the TDD frequency band takes place at frequencies adjacent to frequencies at which at least a portion of uplink communications takes place over the first FDD frequency band;

or

decreasing the first bandwidth when at least a portion of uplink communications over the TDD frequency band takes place at frequencies adjacent to frequencies at which at least a portion of downlink communications takes place over the first FDD frequency band.

6. The method of claim 4, wherein adjusting the third bandwidth of communications comprises one of:

decreasing a downlink communications bandwidth in the second FDD frequency band when at least a portion of downlink communications over the second FDD frequency band takes place at frequencies adjacent to frequencies at which at least a portion of uplink communications takes place over the TDD frequency band;

or

decreasing an uplink communications bandwidth in the second FDD frequency band when at least a portion of uplink communications over the second FDD frequency band takes place at frequencies adjacent to frequencies at which at least a portion of downlink communications takes place over the TDD frequency band.

7. The method of claim 1, further comprising at least one of:

leaving the first bandwidth unadjusted, when uplink communications over the first specified frequency band take place at frequencies adjacent to frequencies at which uplink communications take place over the second specified frequency band;

or

leaving the second bandwidth unadjusted, when downlink communications over the first specified frequency band take place at frequencies adjacent to frequencies at which downlink communications take place over the second specified frequency band.

8. 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.

9. The wireless communication device of claim 8, wherein the processing element is configured to interoperate with the radio circuitry to cause the wireless communication device to perform at least one of:

uplink communications over the first specified frequency band according to the first bandwidth; and

downlink communications over the first specified frequency band according to the second bandwidth.

10. The wireless communication device of claim 8, wherein in adjusting the one of the first bandwidth of uplink communications in the first specified frequency band or the second bandwidth of downlink communications in the first specified frequency band, the processing element is configured to perform one of:

decrease the first bandwidth when the second bandwidth is unchanged;

or

decrease the second bandwidth when the first bandwidth is unchanged.

11. The wireless communication device of claim 8, wherein the first specified frequency band is a time division duplex (TDD) frequency band, and the second specified frequency band is a frequency division duplex (FDD) frequency band, and wherein in adjusting the one of the first bandwidth of uplink communications in the first specified frequency band or the second bandwidth of downlink communications in the first specified frequency band, the processing element is configured to perform one of:

decrease the second bandwidth when at least a portion of downlink communications over the TDD frequency band takes place at frequencies adjacent to frequencies at which at least a portion of uplink communications takes place over the FDD frequency band; and

decrease the first bandwidth when at least a portion of uplink communications over the TDD frequency band takes place at frequencies adjacent to frequencies at which at least a portion of downlink communications takes place over the FDD frequency band.

12. The wireless communication device of claim 8, wherein the first frequency band is a time division duplex (TDD) frequency band, and the third frequency band is a frequency division duplex (FDD) frequency band, and wherein the processing element is configured to perform one of:

decrease a downlink communications bandwidth in the FDD frequency band when at least a portion of downlink communications over the FDD frequency band takes place at frequencies adjacent to frequencies at which at least a portion of uplink communications takes place over the TDD frequency band;

or

decrease an uplink communications bandwidth in the FDD frequency band when at least a portion of uplink communications over the FDD frequency band takes place at frequencies adjacent to frequencies at which at least a portion of downlink communications takes place over the TDD frequency band.

13. The wireless communication device of claim 8, wherein the processing element is configured to perform one of:

leave the first bandwidth unadjusted, when uplink communications over the first frequency band take place at frequencies adjacent to frequencies at which uplink communications takes place over the second frequency band;

or

leave the second bandwidth unadjusted, when downlink communications over the first frequency band take place at frequencies adjacent to frequencies at which downlink communications take place over the second frequency band.

14. 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.

15. The apparatus of claim 14, wherein the processing element is configured to further cause the first wireless communications device to perform at least one of:

uplink communications over the first specified frequency band according to the first bandwidth;

or

downlink communications over the first specified frequency band according to the second bandwidth.

16. The apparatus of claim 14, wherein the processing element is configured to further cause the first wireless communications device to perform one of:

decrease the first bandwidth when the second bandwidth is unchanged;

or

decrease the second bandwidth when the first bandwidth is unchanged.

17. The apparatus of claim 14, wherein the first specified frequency band is a time division duplex (TDD) frequency band, and the second specified frequency band is a frequency division duplex (FDD) frequency band, and wherein the processing element is configured to further cause the first wireless communications device to perform one of:

decrease the second bandwidth when at least a portion of downlink communications over the TDD frequency band takes place at frequencies adjacent to frequencies at which at least a portion of uplink communications takes place over the FDD frequency band;

or

decrease the first bandwidth when at least a portion of uplink communications over the TDD frequency band takes place at frequencies adjacent to frequencies at which at least a portion of downlink communications takes place over the FDD frequency band.

18. The apparatus of claim 14, wherein the first specified frequency band is a time division duplex (TDD) frequency band, and the third specified frequency band is a frequency division duplex (FDD) frequency band, and wherein the processing element is configured to further cause the first wireless communications device to perform one of:

decrease a downlink communications bandwidth in the FDD frequency band when at least a portion of downlink communications over the FDD frequency band takes place at frequencies adjacent to frequencies at which at least a portion of uplink communications takes place over the TDD frequency band;

or

decrease an uplink communications bandwidth in the FDD frequency band when at least a portion of uplink communications over the FDD frequency band takes place at frequencies adjacent to frequencies at which at least portions of downlink communications takes place over the TDD frequency band.

19. The apparatus of claim 14, wherein the processing element is configured to further cause the first wireless communications device to perform one of:

leave the first bandwidth unadjusted, when uplink communications over the first specified frequency band take place at frequencies adjacent to frequencies at which uplink communications takes place over the second specified frequency band;

or

leave the second bandwidth unadjusted, when downlink communications over the first specified frequency band take place at frequencies adjacent to frequencies at which downlink communications takes place over the second specified frequency band.

20. The apparatus of claim 14, wherein the processing element is configured to further cause the first wireless communications device to:

adjust a communications bandwidth within the first specified frequency band 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 a portion of communications in the first specified frequency band take place at frequencies adjacent to frequencies at which at least a portion of communications in the second specified frequency band takes place.