Mitigating interference in full duplex communication

• US 10,123,222 B2
• Filed: 09/13/2013
• Issued: 11/06/2018
• 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.
• Primary Examiner(s): Renner, Brandon
• Assistant Examiner(s): Ajid, Abdeltif
• Application Number:
  US14/026,988
• Publication Number:
  US 20150078177A1
• Time in Patent Office: 1,880 Days
• Field of Search: 370252
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• 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 for managing interference, the method comprising:

receiving, by an enhanced user equipment (eUE), an assignment of Resource Blocks (RBs) from an eNodeB (eNB), wherein the assignment of RBs assigns one or more RBs to the eUE;

receiving, at the eUE, uplink transmissions on the one or more RBs assigned to the eUE from one or more legacy UEs;

generating a channel quality measurement based on the uplink transmissions on the one or more RBs assigned to the eUE from the one or more legacy UEs, wherein the channel quality measurement comprises a Channel Quality Indicator (CQI);

identifying an interfering legacy UE that generates interferences on the one or more RBs, wherein the identifying the interfering legacy UE that generates interferences on the one or more RBs comprises;

decoding the uplink transmissions to obtain a pilot sequence in the uplink transmissions, wherein each of the one or more legacy UEs is assigned with a different pilot sequence; and

identifying the interfering legacy UE by comparing the obtained pilot sequence with the pilot sequence of each of the one or more legacy UEs; and

reporting, to the eNB, the channel quality measurement and an identifier identifying the interfering legacy UE, wherein the eNB schedules a first downlink signal to the eUE based on the channel quality measurement.

2. The method of claim 1, wherein the channel quality measurement includes a request to communicate using a subset of the assigned RBs or specified sub-carriers in the assigned RBs.

3. The method of claim 1, further comprising:

transmitting, to the eNB, an indication that a subset of the assigned RBs or specified sub-carriers in the assigned RBs are selected for communication; and

communicating with the eNB using the subset or the specified sub-carriers.

4. The method of claim 1, further comprising:

reporting carrier frequencies and interference power for uplink transmissions; and

receiving, from the eNB, a different assignment of RBs.

5. The method of claim 1, wherein measuring interference comprises scanning each subcarrier in each of the assigned RBs to determine interference from uplink transmissions from the one or more legacy UEs.

6. An enhanced User Equipment (eUE) for managing interference, comprising:

one or more processors configured to;

receive an assignment of Resource Blocks (RBs) from an eNodeB (eNB), wherein the assignment of RBs assigns one or more RBs to the eUE;

receive uplink transmissions on the one or more RBs assigned to the eUE from one or more legacy UEs;

generate a channel quality measurement based on the uplink transmissions on the one or more RBs assigned to the eUE from the one or more legacy UEs, wherein the channel quality measurement comprises a Channel Quality Indicator (CQI);

identify an interfering legacy UE that generates interferences on the one or more RBs, wherein the one or more processors configured to identify the interfering legacy UE that generates interferences on the one or more RBs comprises the one or more processors configured to;

decode the uplink transmissions to obtain a pilot sequence in the uplink transmissions, wherein each of the one or more legacy UEs is assigned with a different pilot sequence; and

identify the interfering legacy UE by comparing the obtained pilot sequence with the pilot sequence of each of the one or more legacy UEs; and

report, to the eNB, the channel quality measurement and an identifier identifying the interfering legacy UE, wherein the eNB schedules a first downlink signal to the eUE based on the channel quality measurement.

7. The eUE of claim 6, wherein the channel quality measurement includes a request to communicate using a subset of the assigned RBs or specified sub-carriers in the assigned RBs.

8. The eUE of claim 6, the one or more processors further operable to:

transmit, to the eNB, an indication that a subset of the assigned RBs or specified sub-carriers in the assigned RBs are selected for communication; and

communicate with the eNB using the subset or the specified sub-carriers.

9. The eUE of claim 6, the one or more processors further operable to:

report carrier frequencies and interference power for uplink transmissions; and

receive, from the eNB, a different assignment of RBs.

10. The eUE of claim 6, wherein measuring interference comprises scanning each subcarrier in each of the assigned RBs to determine interference from uplink transmissions from the one or more legacy UEs.