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US 11,381,365 B2Granted
Collision of sounding reference signal (SRS) and physical uplink shared channel (PUSCH) in case of carrier aggregation
AssigneeQUALCOMM Incorporated
InventorsLe Liu, Alberto Rico Alvarino, Alexandros Manolakos, Prashanth Akula, Supratik Bhattacharjee, Qiang Shen
Life of this patent
Estimating the term…
Abstract
Certain aspects of the present disclosure provide techniques for handling collisions between PUSCH and sounding reference signal (SRS) on additional SRS symbols in an uplink subframe using carrier aggregation. The techniques provide rules that a user equipment (UE) may apply to decide if and when to drop or apply power scaling to SRS or PUSCH transmissions scheduled on overlapping time resources.
Claims23
A method of wireless communications by a user equipment (UE) in a network, comprising:
- receiving, from the network, signaling indicating, for a set of one or more uplink subframes, a first configuration for transmitting zero or more sounding reference signal (SRS) transmissions of a first type in a first component carrier (CC) and a second configuration for transmitting zero or more SRS transmissions of a second type in the first CC;
- detecting, based on the configuration, a potential collision in a time domain of a subframe between one or more SRS transmissions in the first CC and a scheduled physical uplink shared channel (PUSCH) transmission in a second CC;
- determining whether to drop or apply power scaling to at least one of the SRS transmissions or the PUSCH transmission based on at least one of a transmission type, symbol number, symbol location, or allocated power of the SRS transmissions or PUSCH transmission, wherein:
- a shortened PUSCH is also scheduled for transmission on the first CC in the subframe;
- and
- the determination is to drop at least one SRS transmission if total allocated power for a symbol or group of symbols including the SRS transmissions is greater than a transmit power threshold and also to transmit the shortened PUSCH or drop the shortened PUSCH transmission depending on a length of the shortened PUSCH transmission;
- and
- transmitting at least one of the PUSCH or SRS in accordance with the determination.
5 more elements
A method of wireless communications by a user equipment (UE) in a network, comprising:
- receiving, from the network, signaling indicating, for a set of one or more uplink subframes, a first configuration for transmitting zero or more sounding reference signal (SRS) transmissions of a first type in a first component carrier (CC) and a second configuration for transmitting zero or more SRS transmissions of a second type in the first CC;
- detecting, based on the configuration, a potential collision in a time domain of a subframe between one or more SRS transmissions in the first CC and a scheduled physical uplink shared channel (PUSCH) transmission in a second CC;
- determining whether to drop or apply power scaling to at least one of the SRS transmissions or the PUSCH transmission based on at least one of a transmission type, symbol number, symbol location, or allocated power of the SRS transmissions or PUSCH transmission, wherein:
- the determination is to apply power scaling to at least one of the SRS transmissions or the PUSCH transmission if allocated transmit power for a symbol or a group of symbols including the SRS transmissions is greater than a transmit power threshold, and
- the power scaling is applied with a priority based on a power difference between symbols of the PUSCH transmission and SRS transmissions, if the power difference between symbols of the PUSCH transmission and SRS transmissions is no larger than a threshold power difference;
- and
- transmitting at least one of the PUSCH or SRS in accordance with the determination.
4 more elements
A method of wireless communications by a user equipment (UE) in a network, comprising:
- receiving, from the network, signaling indicating, for a set of one or more uplink subframes, a first configuration for transmitting zero or more sounding reference signal (SRS) transmissions of a first type in a first component carrier (CC) and a second configuration for transmitting zero or more SRS transmissions of a second type in the first CC;
- detecting, based on the configuration, a potential collision in a time domain of a subframe between one or more SRS transmissions in the first CC and a scheduled physical uplink shared channel (PUSCH) transmission in a second CC;
- determining whether to drop or apply power scaling to at least one of the SRS transmissions or the PUSCH transmission based on at least one of a transmission type, symbol number, symbol location, or allocated power of the SRS transmissions or PUSCH transmission, wherein:
- the determination is also based on a power change condition involving symbols in the first CC being satisfied;
- and
- the power change condition involves a power difference between any two symbols of:
- an SRS transmission of the first type, an SRS transmission of the second type, a shortened PUSCH, or an empty symbol, being less than or equal to a threshold power difference;
- and
- transmitting at least one of the PUSCH or SRS in accordance with the determination, wherein the SRS transmission is scheduled for transmission in the first CC using a first radio frequency (RF) chain and the PUSCH transmission is scheduled for transmission in the second CC also using the first RF chain.
6 more elements
A method of wireless communications by a user equipment (UE) in a network, comprising:
- receiving, from the network, signaling indicating, for a set of one or more uplink subframes, a first configuration for transmitting zero or more sounding reference signal (SRS) transmissions of a first type in a first component carrier (CC) and a second configuration for transmitting zero or more SRS transmissions of a second type in the first CC;
- detecting, based on the configuration, a potential collision in a time domain of a subframe between one or more SRS transmissions in the first CC and a scheduled physical uplink shared channel (PUSCH) transmission in a second CC;
- determining whether to drop or apply power scaling to at least one of the SRS transmissions or the PUSCH transmission based on at least one of a transmission type, symbol number, symbol location, or allocated power of the SRS transmissions or PUSCH transmission, wherein the determination is to apply power scaling to at least one of the SRS transmissions or the PUSCH transmission if a power difference between SRS transmission in a first CC and PUSCH transmission in a second CC is no less than a threshold power difference;
- and
- transmitting at least one of the PUSCH or SRS in accordance with the determination.
2 more elements
Dependencies are inferred from the claim text.