Asymmetric TDD in flexible use spectrum

• US 10,263,756 B2
• Filed: 07/04/2017
• Issued: 04/16/2019
• Est. Priority Date: 11/14/2008
• Status: Active Grant

• Current Assignee: DBSD Corporation (Dish Network Corporation)
• Original Assignee: Dish Network Corporation
• Inventors: Sorond, Mariam, Corea, Peter, Hyslop, Doug, Peters, Tom
• Primary Examiner(s): Aung, Sai
• Application Number:
  US15/641,289
• Publication Number:
  US 20170310453A1
• Time in Patent Office: 651 Days
• CPC Class Codes: H04B 7/2615 using hybrid frequency-time division multiple access [FDMA-TDMA]
• CPC Class Codes: H04J 3/22 in which the sources have different rates or codes simultaneous speech and digital data or video transmission H04M11/06; see provisional also H04J3/16
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex

Abstract

A method according to an embodiment of the invention includes receiving and transmitting signals over a time division duplex (TDD) communication path. Signals are sent over the TDD communication path via a first portion and are received via a second portion of a first frequency band, wherein the first portion uses a smaller spectrum bandwidth than the second portion. The first frequency band is adjacent to a second frequency band and to a third frequency band. The second frequency band includes a first temporally-asymmetric TDD communication path having a third portion and a fourth portion. The third frequency band includes a second temporally-asymmetric TDD communication path having a fifth portion and a sixth portion.

Claims

1. A method, comprising:

transmitting a first signal over a time division duplex (TDD) communication path via a first portion of a first frequency band;

receiving a second signal over the TDD communication path via a second portion of the first frequency band;

wherein the first portion uses a smaller spectrum bandwidth than the second portion;

wherein the first frequency hand is adjacent to a second frequency band;

wherein the second frequency band includes a second TDD communication path having a third portion and a fourth portion;

wherein a first guard band separates the first portion from each of the third portion and, for a limited time segment, the fourth portion;

wherein the first frequency band is adjacent to a third frequency band; and

wherein the third frequency band includes a third TDD communication path having a fifth portion and a sixth portion.

2. The method of claim 1,

wherein the first frequency band is mutually exclusive of and arises in-between the second frequency band and the third frequency band.

3. The method of claim 1,

wherein the second TDD communication path is temporally-asymmetric.

4. The method of claim 1,

wherein the third TDD communication path is temporally-asymmetric.

5. The method of claim 4,

wherein a second guard-band separates the first portion from at least one of the fifth portion and the sixth portion.

6. The method of claim 1, comprising at least one of

transmitting a third signal over the third portion and

receiving a fourth signal over the fourth portion.

7. The method of claim 6,

wherein the transmitting of the first signal begins before the transmitting of the third signal begins and while the fourth signal is being received.

8. The method of claim 6,

wherein the receiving of the fourth signal occurs during a first period ranging from an initial time to a second time;

wherein the transmitting of the first signal occurs during a second period ranging from a first time to a third time; and

wherein the first time arises after the initial time and before the second time, and the third time arises after the second time.

9. The method of claim 8, comprising at least one of

transmitting a fifth signal over the first portion and

receiving a sixth signal over the sixth portion.

10. The method of claim 9,

wherein the transmitting of the third signal and the transmitting of the fifth signal occur during a third period ranging from a second time to a third time;

wherein the first period arises before the third period; and

wherein, the receiving of the fourth signal occurs daring the first period.

11. The method of claim 6, comprising:

receiving a sixth signal over the sixth portion; and

wherein the transmitting of the first signal begins while the sixth signal is being received.

12. The method of claim 1,

wherein the second portion is immediately adjacent to the fourth portion.

13. The method of claim 12,

wherein the second, portion is immediately adjacent to the sixth portion.

14. The method of claim 1,

wherein the first portion uses a smaller frequency range than the second portion.

15. A method, comprising:

sending a first signal over a first time division duplex (TDD) communication path via a first portion of a first frequency band;

receiving a second signal over the first TDD communication path via a second portion of the first frequency band different;

wherein the first portion of the first frequency band uses a larger spectrum bandwidth than the second portion of the first frequency band;

wherein the first frequency band is adjacent to and mutually exclusive of a second frequency band;

wherein the second frequency band includes a second TDD communication path that comprises a first temporally-asymmetric path including a third portion and a fourth portion;

wherein a first guard hand separates the first portion from each of the fourth portion and, for a limited time segment, the third portion;

wherein the first frequency band is adjacent to and mutually exclusive of a third frequency band;

wherein the third frequency band includes a third TDD communication path, that comprises a second temporally-asymmetric path including a fifth portion and a sixth portion; and

wherein a second guard band separates the first portion from each of the sixth portion and, for a limited time segment, the fit portion.

16. A method comprising,

sending a first signal over a first time division duplex (TDD) communication path via a first portion of a first frequency band;

receiving a second signal over the first TDD communication path via a second portion of the first frequency band different from the first portion of the first frequency band;

wherein the first frequency band is adjacent to a second frequency band and a third frequency band;

wherein, the first frequency band is different from the second frequency band and the third frequency band;

wherein the second frequency band includes a second TDD communication path;

wherein the second TDD communication path comprises a first temporally-asymmetric path including a third portion and a fourth portion;

wherein the third frequency band includes a third TDD communication path;

wherein the third TDD communication path comprises a second temporally-asymmetric path including a fifth portion and a sixth portion; and

wherein the third portion of the first temporally-asymmetric path is synchronous with the sixth portion of the second temporally-asymmetric path;

wherein a first guard band separates the first portion from;

each of the third portion and, for a limited time segment, the fourth portion;

or

each of the fourth portion and, for a limited time segment, the third portion.

17. The method of claim 16,

wherein the first portion of the first frequency band uses a smaller spectrum bandwidth than the second portion of the first frequency band.

18. The method of claim 16,

wherein the first portion of the first frequency band uses a larger spectrum bandwidth than the second portion of the first frequency band.