US 10,219,295 B2 · Triggering of reference signals and control signaling

Abstract

When triggering a user equipment (UE) to send a reference signal (SRS) the network configures the UE with multiple parameter sets, each having a timing indication. The UE's resource allocation grants multiple uplink (UL) subframes and identifies/selects one of those parameter sets. The timing indication of the selected set identifies one of the granted UL subframes, in one embodiment by counting only among the allocated/granted shortened UL subframes. This triggers the UE to send SRS in that identified shortened UL subframe. In one embodiment if no UL subframes in the grant are shortened this triggers the UE to send SRS in a subframe previous to an the allocated/granted multiple UL subframes. The same mechanism can be used to trigger feedback reports such as aperiodic channel state information or block ACK/NACK reports, where the different UL signaling being triggered is requested in the network's resource allocation to the UE.

Claims26

Dependent claims

A method comprising:

receiving at a user equipment a configuration of multiple sounding reference signal parameter sets each set including a timing indication;
receiving at the user equipment being configured with the sounding reference signal parameter sets a grant that allocates multiple uplink subframes;
based on the grant, determining whether at least one of the multiple allocated uplink subframes is shortened such that uplink transmission is prohibited in only a portion thereof, and, if affirmative, which of the multiple uplink subframes are shortened;
determining from the grant that a sounding reference signal is requested;
determining from the grant a selected one of the sounding reference signal parameter sets;
identifying one uplink subframe based on the determination which of the multiple allocated uplink subframes are shortened and the timing indication of the selected sounding reference signal parameter set;
and
transmitting the sounding reference signal as requested by the grant in the identified uplink subframe.

5 more elements

An apparatus comprising:

at least one processor;
and
at least one memory storing computer program code;
wherein the at least one processor is configured with the at least one memory and the computer program code to cause the apparatus to at least:
receive a configuration of multiple sounding reference signal parameter sets each set including a timing indication;
receive at the apparatus being configured with the sounding reference signal parameter sets a grant that allocates multiple uplink subframes;
determine based on the grant whether at least one of the multiple allocated uplink subframes is shortened such that uplink transmission is prohibited in only a portion thereof, and, if affirmative, which of the multiple uplink subframes are shortened;
determine from the grant that a sounding reference signal is requested;
determine from the grant a selected one of the sounding reference signal parameter sets;
identify one uplink subframe based on the determination which of the multiple allocated uplink subframes are shortened and the timing indication of the selected sounding reference signal parameter set;
and
transmit the sounding reference signal as requested by the grant in the identified uplink subframe.

9 more elements

An apparatus comprising:

at least one processor;
and
at least one memory storing computer program code;
wherein the at least one processor is configured with the at least one memory and the computer program code to cause the apparatus to at least:
transmit to a user equipment a configuration of multiple sounding reference signal parameter sets each set including a timing indication;
determine multiple uplink subframes to be scheduled to the user equipment;
identify one uplink subframe in which the user equipment is to transmit a sounding reference signal;
select one of the multiple sounding reference signal parameter sets, wherein for the case in which at least one of the multiple uplink subframes is shortened such that uplink transmission is prohibited in only a portion thereof the timing indication of the selected parameter set indicates the identified one uplink subframe from among the multiple uplink subframes;
and
transmit to the user equipment being configured with the sounding reference signal parameter sets a grant that schedules the user equipment for the multiple uplink subframes and that triggers the user equipment to transmit a sounding reference signal, the grant further identifying the selected parameter set and which if any of the multiple uplink subframes are shortened.

7 more elements

Dependencies are inferred from the claim text.

Triggering of reference signals and control signaling

Life of this patent

Triggering of reference signals and control signaling

Life of this patent

Abstract

Claims26