US 11,910,326 B2Granted

Sub-band-full-duplex interference mitigation

AssigneeQUALCOMM Incorporated

InventorsJoseph Patrick Burke, Muhammad Sayed Khairy Abdelghaffar, Charline Hao, Joseph Binamira Soriaga, Lai Kan Leung, Gurkanwal Singh Sahota, Tingfang Ji, Krishna Kiran Mukkavilli, Allen Minh-Triet Tran

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Abstract

During an uplink TDD slot, an UL UE transmits an UL signal that occupies a slot frequency range. Similarly, during a DL TDD slot, a DL UE receives a DL signal that occupies the slot frequency range. But during an SBFD slot, a UL UE transmits a UL signal that occupies only a first sub-band of the slot frequency range. Similarly, a DL UE receives a DL signal during an SBFD slot that occupies only a second sub-band of the slot frequency range. The second sub-band is distinct from the first sub-band. The DL UE may thus mitigate UE-to-UE interference during an SBFD slot by filtering the DL signal to substantially block the second sub-band from being received at the DL UE.

Claims12

Dependent claims

A method of reducing sub-band full duplex (SBFD) user equipment (UE)-to-UE interference, comprising:

during a SBFD slot at a downlink (DL) UE in which the DL UE transmits no uplink (UL) signals and in which an UL UE transmits no DL signals:
receiving a radio frequency (RF) signal that includes a DL signal occupying a first sub-band of a slot frequency band for the SBFD slot and that further includes an uplink (UL) signal from the UL UE, the UL signal occupying a second sub-band of the slot frequency band, wherein the first sub-band comprises a lower sub-band and an upper sub-band of the slot frequency band and the second sub-band comprises a central sub-band of the slot frequency band, the lower sub-band being separated in frequency from the upper sub-band by the central sub-band;
down converting the RF signal in frequency to form a baseband signal that includes a down converted version of the DL signal and a down converted version of the UL signal;
high-pass filtering the baseband signal to pass the down converted version of the DL signal and to substantially attenuate the down converted version of the UL signal;
detecting that the UL signal is causing interference at the DL UE;
and
transmitting a message from the DL UE to a base station to request that the base station transmit a command to the UL UE to adjust a power of the UL signal to reduce the interference.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/086,373Filed 31 Oct 2020 · us provisional application
Priority: 2 Nov 2019
Published: US 2021/0136696 A16 May 2021
Granted: 20 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

H04B 1/123
Neutralising, balancing, or compensation arrangements: using adaptive balancing or compensation means
H04W 52/146
Separate analysis of uplink or downlink: uplink power control
H04B 1/525
Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of…
H04B 15/00
Suppression or limitation of noise or interference

Family

Application62/929,856Us provisional application · filed 2 Nov 2019
US 2021/0136696 A1Pre-grant publication · published 6 May 2021
US 11,910,326 B2This patent

From the US filing history. Foreign family members aren’t listed.

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