Full Duplex Resource Reuse Enablement

• US 20150078212A1
• Filed: 09/13/2013
• Published: 03/19/2015
• Est. Priority Date: 09/13/2013
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Buckley, Michael Eoin, Ali, Shirook M.
• Granted Patent: US 10,110,264 B2
• Time in Patent Office: Days
• US Class Current: 370/277
• CPC Class Codes: H04B 1/1027 assessing signal quality or detecting noise/interference for the received signal
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

Systems and apparatuses involve implementing methods that may include receiving, by enhanced user equipment (eUE), an assignment of Resource Blocks (RBs) from an eNodeB (eNB), wherein the eUE is configured to receive full-duplex transmissions; for each assigned RB, measuring interference caused by uplink transmissions from one or more legacy UEs; and reporting, to the eNB, the measured interference. The present implementations may provide an eUE-based approach, an eUE and eNB interactive approach, an eUE baseband approach, and an eUE analog approach to reducing interference for full duplex enabled mobile devices.

Claims

1. A method of mitigating interference, the method comprising:

receiving, by an eUE, uplink transmissions including pilot signals from one or more interfering legacy UEs, wherein the pilot sequences for the one or more legacy UEs are different from a specific sequence assigned to the eUE; and

determining channel estimates for downlink transmissions to the eUE using the pilot sequences for the one or more legacy UEs.

2. The method of claim 1, further comprising receiving, from an eNB, information identifying a same pilot sequence is assigned to the one or more interfering legacy UEs or different pilot sequences assigned to the one or more interfering legacy UEs.

3. The method of claim 1, further comprising blindly decoding uplink transmissions to determine pilot sequences assigned to the one or more interfering legacy UEs.

4. The method of claim 1, further comprising reporting, to the eNB, interference power for uplink transmissions from the one or more interfering legacy UEs.

5. A method of mitigating interference, the method comprising:

determining, by the eUE, interference from uplink transmissions of legacy UEs during a first slot when the eUE is inactive, the eUE configured to receive full-duplex transmissions; and

pre-distorting a signal in a second slot to reduce the determined interference in the signal.

6. The method of claim 5, wherein the signal comprises a transmission signal.

7. The method of claim 5, wherein the signal comprises a downlink signal, and the interference is caused by both the uplink transmissions of the legacy UEs and a transmitter of the eUE.

8. The method of claim 5, wherein pre-distorting the signal includes adding an inverse of the identified interference to the signal.

9. A device for mitigating interference, comprising:

one or more processors configured to;

receive, by an eUE, uplink transmissions including pilot signals from one or more interfering legacy UEs, wherein the pilot sequences for the one or more legacy UEs are different from a specific sequence assigned to the eUE; and

determine channel estimates for downlink transmissions to the eUE using the pilot sequences for the one or more legacy UEs.

10. The device of claim 9, the one or more processors configured to receive, from an eNB, information identifying a same pilot sequence is assigned to the one or more interfering legacy UEs or different pilot sequences assigned to the one or more interfering legacy UEs.

11. The device of claim 9, the one or more processors configured to blindly decode uplink transmissions to determine pilot sequences assigned to the one or more interfering legacy UEs.

12. The device of claim 9, the one or more processors configured to report, to the eNB, interference power for uplink transmissions from the one or more interfering legacy UEs.