US 11,638,217 B2Granted

SRS antenna switching for multiple receive antennas

AssigneeQUALCOMM Incorporated

InventorsWeimin Duan, Alexandros Manolakos, Muhammad Sayed Khairy Abdelghaffar, Pavan Kumar Vitthaladevuni, Krishna Kiran Mukkavilli, Runxin Wang

Life of this patent

Estimating the term…

patentgrep

Loading patent…

Abstract

This disclosure provides methods, devices and systems for channel sounding for wireless communications. Some implementations more specifically relate to scheduling sounding reference signal (SRS) resource sets for wireless devices having more than 4 receive (RX) antenna ports. In some implementations, a base station may determine an antenna switching capability of a user equipment (UE). The antenna switching capability indicates a number of RX antenna ports of the UE. The base station schedules a number of SRS resource sets for the UE based at least in part on the number of RX antenna ports in excess of four. For example, the number of RX antenna ports may be equal to 8. As another example, the number of RX antenna ports may be equal to 6. The base station further receives, from the UE, uplink transmissions of one or more SRS resources for each of the scheduled SRS resource sets.

Claims32

Dependent claims

A method of wireless communication, comprising:

receiving an indication of an antenna switching capability of a user equipment (UE), the antenna switching capability representing a number of receive (RX) antenna ports of the UE, and an indication of a number of transmit (TX) chains of the UE switchably coupled to two or more of the RX antenna ports,
a number of sounding reference signal (SRS) resource sets configured for the UE being based on the number of the TX chains and based on the number of the RX antenna ports being in excess of four,
each SRS resource set, of the number of the SRS resource sets, being provided in a different uplink (UL) slot,
each SRS resource set, of the number of the SRS resource sets, comprising the last 6 symbols of a respective UL slot, and
wherein at least one of:
each SRS resource set, of the number of the SRS resource sets, includes up to 2 SRS resources, the number of the TX chains being equal to 1 and the number of the SRS resource sets being greater than 2;
each SRS resource set, of the number of the SRS resource sets, includes up to 2 SRS resources, the number of the TX chains being greater than 1 and the number of the SRS resource sets being greater than or equal to 1;
each SRS resource set, of the number of the SRS resource sets, includes up to 3 SRS resources, the number of the TX chains being equal to 1 and the number of the SRS resource sets being greater than 2;
or
each SRS resource set, of the number of the SRS resource sets, includes up to 3 SRS resources, the number of the TX chains being greater than 1 and the number of the SRS resource sets being greater than or equal to 1;
and
receiving, from the UE, UL transmissions of one or more SRS resources for each SRS resource set of the number of the SRS resource sets.

9 more elements

A wireless communication device comprising:

at least one processor;
and
at least one memory communicatively coupled with the at least one processor and storing processor-readable code that, when executed by the at least one processor, is configured to cause the wireless communication device to:
receive an indication of an antenna switching capability of a user equipment (UE), the antenna switching capability representing a number of receive (RX) antenna ports of the UE, and an indication of a number of transmit (TX) chains of the UE switchably coupled to two or more of the RX antenna ports,
a number of sounding reference signal (SRS) resource sets configured for the UE being based on the number of the TX chains and based on the number of the RX antenna ports being in excess of four,
each SRS resource set, of the number of the SRS resource sets, being provided in a different uplink (UL) slot,
each SRS resource set, of the number of the SRS resource sets, comprising the last 6 symbols of a respective UL slot, and
wherein at least one of:
each SRS resource set, of the number of the SRS resource sets, includes up to 2 SRS resources, the number of the TX chains being equal to 1 and the number of the SRS resource sets being greater than 2;
each SRS resource set, of the number of the SRS resource sets, includes up to 2 SRS resources, the number of the TX chains being greater than 1 and the number of the SRS resource sets being greater than or equal to 1;
each SRS resource set, of the number of the SRS resource sets, includes up to 3 SRS resources, the number of the TX chains being equal to 1 and the number of the SRS resource sets being greater than 2;
or
each SRS resource set, of the number of the SRS resource sets, includes up to 3 SRS resources, the number of the TX chains being greater than 1 and the number of the SRS resource sets being greater than or equal to 1;
and
receive, from the UE, UL transmissions of one or more SRS resources for each SRS resource set of the number of the SRS resource sets.

12 more elements

A method of wireless communication, comprising:

reporting, to a network node, an antenna switching capability indicating at least a number of receive (RX) antenna ports being greater than four and an indication of a number of transmit (TX) chains switchably coupled to two or more of the RX antenna ports,
a number of sounding reference signal (SRS) resource sets being configured based on the number of the TX chains and based on the number of the RX antenna ports being greater than four,
each SRS resource set, of the number of the SRS resource sets, being provided in a different uplink (UL) slot,
each SRS resource set, of the number of the SRS resource sets, comprising the last 6 symbols of a respective UL slot, and
wherein at least one of:
each SRS resource set, of the number of the SRS resource sets, includes up to 2 SRS resources, the number of the TX chains being equal to 1 and the number of the SRS resource sets being greater than 2;
each SRS resource set, of the number of the SRS resource sets, includes up to 2 SRS resources, the number of the TX chains being greater than 1 and the number of the SRS resource sets being greater than or equal to 1;
each SRS resource set, of the number of the SRS resource sets, includes up to 3 SRS resources, the number of the TX chains being equal to 1 and the number of the SRS resource sets being greater than 2;
or
each SRS resource set, of the number of the SRS resource sets, includes up to 3 SRS resources, the number of the TX chains being greater than 1 and the number of the SRS resource sets being greater than or equal to 1;
and
transmitting, to the network node, one or more SRS resources for each SRS resource set of the number of the SRS resource sets.

9 more elements

A wireless communication device comprising:

at least one processor;
and
at least one memory communicatively coupled with the at least one processor and storing processor-readable code that, when executed by the at least one processor, is configured to cause the wireless communication device to:
report, to a network node, an antenna switching capability indicating at least a number of receive (RX) antenna ports being greater than four and an indication of a number of transmit (TX) chains switchably coupled to two or more of the RX antenna ports,
a number of sounding reference signal (SRS) resource sets configured for the wireless communication device being based on the number of the TX chains and based on the number of the RX antenna ports being greater than four,
each SRS resource set, of the number of the SRS resource sets, being provided in a different uplink (UL) slot,
each SRS resource set, of the number of the SRS resource sets, comprising the last 6 symbols of a respective UL slot, and
wherein at least one of:
each SRS resource set, of the number of the SRS resource sets, includes up to 2 SRS resources, the number of the TX chains being equal to 1 and the number of the SRS resource sets being greater than 2;
each SRS resource set, of the number of the SRS resource sets, includes up to 2 SRS resources, the number of the TX chains being greater than 1 and the number of the SRS resource sets being greater than or equal to 1;
each SRS resource set, of the number of the SRS resource sets, includes up to 3 SRS resources, the number of the TX chains being equal to 1 and the number of the SRS resource sets being greater than 2;
or
each SRS resource set, of the number of the SRS resource sets, includes up to 3 SRS resources, the number of the TX chains being greater than 1 and the number of the SRS resource sets being greater than or equal to 1;
and
transmit, to the network node, one or more SRS resources for each SRS resource set of the number of the SRS resource sets.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/066,115Filed 8 Oct 2020
Priority: GR 201901004489 Oct 2019
Published: US 2021/0112498 A115 Apr 2021
Granted: 25 Apr 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

H04L 25/0226
Using sounding signals: sounding signals per se
H04W 52/0274
Managing power supply demand, e.g. depending on battery level: by switching on or off the equipment or parts thereof
H04B 7/0404
Using two or more spaced independent antennas: the mobile station comprising multiple antennas, e.g. to provide uplink diversity
H04B 7/0817
Using antenna selection: with multiple receivers and antenna path selection