Sub-band selection at cellular base station for non-overlapped or partially overlapped full duplex operation

Patent metadata

Field	Value
Publication number	US-12200629-B2
Application number	US-202217730732-A
Country	US
Kind code	B2
Filing date	Apr 27, 2022
Priority date	Apr 27, 2022
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

Aspects of the subject disclosure may include, for example, determining a self-interference channel response of a transceiver of a mobile base station having a transmitter and a receiver. The self-interference channel response spans multiple sub-bands of a predetermined mobile cellular frequency channel. A first sub-band of the multiple sub-bands is identified according to the self-interference channel response and, an estimate is determined, at the receiver, of a first coupled transmit power level of the transmitter when operating within the first sub-band. A receiver sensitivity is adjusted according to the first coupled transmit power level to obtain an adjustment adapted to increase receiver sensitivity, while restricting operation of the receiver to a substantially linear region. The adjustment allows a transmission within the first sub-band and a reception within a second sub-band of the plurality of sub-bands to occur simultaneously at the mobile base station. Other embodiments are disclosed.

First claim

What is claimed is:

1. A method, comprising:
measuring, by a processing system including a processor, a self-interference channel response of a transceiver of a mobile base station comprising a transmitter and a receiver, wherein the self-interference channel response spans a plurality of sub-bands of a predetermined mobile cellular frequency channel;
selecting, by the processing system, a first sub-band of the plurality of sub-bands according to the self-interference channel response;
calculating, by the processing system and at the receiver, an estimate of a first coupled transmit power level of the transmitter when operating within the first sub-band; and
adjusting, by the processing system, a receive level of the receiver according to the first coupled transmit power level to obtain an adjustment adapted to increase receiver sensitivity, while restricting operation of the receiver to a substantially linear region, the adjustment allowing a transmission within the first sub-band and a reception within a second sub-band of the plurality of sub-bands to occur simultaneously at the mobile base station.

2. The method of claim 1 , wherein the selecting the first sub-band further comprises:
determining, by the processing system, a target region of the self-interference channel response having a self-interference channel response comparatively lower than another region of the self-interference channel response; and
associating, by the processing system, the first sub-band with the target region.

3. The method of claim 2 , wherein the calculating the estimate of the first coupled transmit power level further comprises:
determining, by the processing system, a transmit power level of the transmitter; and
calculating, by the processing system, the first coupled transmit power level according to the transmit power level and the self-interference channel response of the target region.

4. The method of claim 1 , wherein each sub-band of the plurality of sub-bands accommodates a group of resource blocks determined according to an application of orthogonal frequency division multiplexing (OFDM).

5. The method of claim 1 , wherein the first sub-band at least partially overlaps the second sub-band at the mobile base station.

6. The method of claim 1 , further comprising:
selecting, by the processing system, a third sub-band of the plurality of sub-bands according to the self-interference channel response;
calculating, by the processing system and at the receiver, a second coupled transmit power level of the transmitter operating within the third sub-band; and
adjusting further, by the processing system, the receive level of the receiver according to the first and second coupled transmit power levels to obtain the adjustment allowing a transmission within the first and third sub-bands and a reception within the second sub-band to occur simultaneously at the mobile base station.

7. The method of claim 1 , further comprising:
determining, by the processing system, a non-linear figure of merit of the receiver, wherein the adjusting the receive level of the receiver occurs according to the non-linear figure of merit and the estimate of the first coupled transmit power level.

8. The method of claim 1 , wherein the adjusting of the receive level further comprises adjusting, by the processing system, one of amplification, attenuation or both.

9. The method of claim 1 , wherein a frequency resolution of the self-interference channel response is prescribed by a mobile network operator.

10. The method of claim 1 , wherein the predetermined mobile cellular frequency channel comprises a receiver frequency band of a channel allocation standardized according to the Third-Generation Partnership Project (3GPP).

11. The method of claim 1 , wherein the first and second sub-bands are assigned by a scheduler and comprises a group of physical resource blocks, each physical resource block of the group of physical resource blocks comprising twelve consecutive subcarriers for each one 0.5 millisecond time slot.

12. A device, comprising:
a processing system including a processor; and
a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, the operations comprising:
determining a self-interference channel response of a transceiver of a mobile base station comprising a transmitter and a receiver, wherein the self-interference channel response spans a plurality of sub-bands of a predetermined mobile cellular frequency channel;
selecting a first sub-band of the plurality of sub-bands according to the self-interference channel response;
determining, at the receiver, an estimate of a first coupled transmit power level of the transmitter when operating within the first sub-band; and
reducing a sensitivity of the receiver according to the first coupled transmit power level to maximum receiver sensitivity, while also maintaining operation of the receiver within a substantially linear region to permit simultaneous transmission within the first sub-band and reception within a second sub-band of the plurality of sub-bands at the mobile base station.

13. The device of claim 12 , wherein the selecting the first sub-band further comprises:
determining a target region of the self-interference channel response having a self-interference channel response comparatively lower than another region of the self-interference channel response; and
associating the first sub-band with the target region.

14. The device of claim 13 , wherein the determining the estimate of the first coupled transmit power level further comprises:
determining a transmit power level of the transmitter; and
calculating the first coupled transmit power level according to the transmit power level and the self-interference channel response of the target region.

15. The device of claim 12 , wherein operation of the transmitter within the first sub-band comprises applying orthogonal frequency division multiplexing (OFDM) to a transmit signal.

16. The device of claim 12 , wherein the first sub-band at least partially overlaps the second sub-band at the mobile base station.

17. A non-transitory, machine-readable medium, comprising executable instructions that, when executed by a processing system including a processor, facilitate performance of operations, the operations comprising:
determining a self-interference channel response of a transceiver of a mobile base station comprising a transmitter and a receiver, wherein the self-interference channel response spans a plurality of sub-bands of a predetermined mobile cellular frequency channel;
identifying a first sub-band of the plurality of sub-bands according to the self-interference channel response;
determining, at the receiver, an estimate of a first coupled transmit power level of the transmitter when operating within the first sub-band; and
adjusting a receiver sensitivity according to the first coupled transmit power level to obtain an adjustment adapted to increase receiver sensitivity, while restricting operation of the receiver to a substantially linear region, the adjustment allowing transmission within the first sub-band and reception within a second sub-band of the plurality of sub-bands to occur simultaneously at the mobile base station.

18. The non-transitory, machine-readable medium of claim 17 , wherein the identifying the first sub-band further comprises:
determining a target region of the self-interference channel response having a self-interference channel response comparatively

Assignees

• At & T Ip I Lp

Inventors

• Chopra Aditya
• Akoum Salam
• Novlan Thomas

Classifications

• H04W72/541

  using the level of interference · CPC title

• H04L5/0058

  Allocation criteria · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title

• H04L5/1461

  Suppression of signals in the return path, i.e. bidirectional control circuits · CPC title