US2022346037A1PendingUtilityA1

Signaling and configuration of maximum transmit power using virtual ports

67
Assignee: QUALCOMM INCPriority: Aug 16, 2019Filed: Jul 5, 2022Published: Oct 27, 2022
Est. expiryAug 16, 2039(~13 yrs left)· nominal 20-yr term from priority
Inventors:Gokul SridharanYi HuangWei YangWanshi ChenPeter Gaal
H04B 7/0404H04L 25/0226H04B 7/0465H04L 27/261H04B 7/0671H04W 8/24H04W 52/367H04B 7/0617G06F 2009/45595H04L 1/1614H04L 5/0048H04L 5/0051H04W 52/265H04B 7/0639G06F 9/45558H04W 52/146
67
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Claims

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a base station, an indication of whether the UE is capable of using a virtual port to transmit uplink communications using a maximum transmit power according to a power class of the UE, wherein the virtual port is a combination of two or more antenna ports. The UE may receive, from the base station, a sounding reference signal configuration based at least in part on the indication. Numerous other aspects are provided.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A user equipment (UE) for wireless communication, comprising:
 a memory; and   one or more processors, coupled to the memory, configured to:   transmit, to a network node, a bitmap associated with a subset of a set of transmit precoding matrix indicators (TPMIs), wherein each TPMI, of the set of TPMIs, supports a maximum transmit power for uplink communications according to a power class of the UE, and wherein at least one TPMI, of the set of TPMIs that support the maximum transmit power, is not represented by any individual bit of the bitmap; and   transmit an uplink communication using a first TPMI included in the set of TPMIs and using a power allocation procedure associated with transmissions that use the first TPMI.   
     
     
         2 . The UE of  claim 1 , wherein the bitmap is 2 bits in length when the UE includes two transmit chains. 
     
     
         3 . The UE of  claim 1 , wherein the bitmap is 2 bits in length when the UE includes two transmit chains and when corresponding connections between transmit chains and transmit antennas are not reconfigurable. 
     
     
         4 . The UE of  claim 1 , wherein the at least one TPMI includes a TPMI in which all transmit chains of the UE are used. 
     
     
         5 . The UE of  claim 1 , wherein each bit in the bitmap corresponds to a single-layer TPMI. 
     
     
         6 . The UE of  claim 1 , wherein the at least one TPMI includes a multi-layer TPMI. 
     
     
         7 . The UE of  claim 1 , wherein the bitmap is 11 bits in length when the UE includes four transmit chains and when corresponding connections between transmit chains and transmit antennas are not reconfigurable. 
     
     
         8 . The UE of  claim 1 , wherein the set of TPMIs indicated by the UE includes fewer than all TPMIs that support the maximum transmit power for the UE. 
     
     
         9 . The UE of  claim 1 , wherein the UE is required to support the maximum transmit power using only a first transmit chain of the UE if the UE has only two transmit chains and is capable of combining antenna ports to transmit uplink communications using the maximum transmit power. 
     
     
         10 . The UE of  claim 1 , wherein the bitmap is 3 bits in length when the UE includes four transmit chains and when corresponding connections between transmit chains and transmit antennas are reconfigurable. 
     
     
         11 . The UE of  claim 1 , wherein the one or more processors are further configured to transmit, to the network node, an indication of whether connections between transmit chains of the UE and transmit antennas of the UE are reconfigurable. 
     
     
         12 . A method of wireless communication performed by a user equipment (UE), comprising:
 transmitting, to a network node, a bitmap associated with a subset of a set of transmit precoding matrix indicators (TPMIs), wherein each TPMI, of the set of TPMIs, supports a maximum transmit power for uplink communications according to a power class of the UE, and wherein at least one TPMI, of the set of TPMIs that support the maximum transmit power, is not represented by any individual bit of the bitmap; and   transmitting an uplink communication using a first TPMI included in the set of TPMIs and using a power allocation procedure associated with transmissions that use the first TPMI.   
     
     
         13 . The method of  claim 12 , wherein the bitmap is 2 bits in length when the UE includes two transmit chains. 
     
     
         14 . The method of  claim 12 , wherein the bitmap is 2 bits in length when the UE includes two transmit chains and when corresponding connections between transmit chains and transmit antennas are not reconfigurable. 
     
     
         15 . The method of  claim 12 , wherein the at least one TPMI includes a TPMI in which all transmit chains of the UE are used. 
     
     
         16 . The method of  claim 12 , wherein each bit in the bitmap corresponds to a single-layer TPMI. 
     
     
         17 . The method of  claim 12 , wherein the at least one TPMI includes a multi-layer TPMI. 
     
     
         18 . The method of  claim 12 , wherein the bitmap is 11 bits in length when the UE includes four transmit chains and when corresponding connections between transmit chains and transmit antennas are not reconfigurable. 
     
     
         19 . The method of  claim 12 , wherein the set of TPMIs indicated by the UE includes fewer than all TPMIs that support the maximum transmit power for the UE. 
     
     
         20 . The method of  claim 12 , wherein the UE is required to support the maximum transmit power using only a first transmit chain of the UE if the UE has only two transmit chains and is capable of combining antenna ports to transmit uplink communications using the maximum transmit power. 
     
     
         21 . The method of  claim 12 , wherein the bitmap is 3 bits in length when the UE includes four transmit chains and when corresponding connections between transmit chains and transmit antennas are reconfigurable. 
     
     
         22 . The method of  claim 12 , further comprising transmitting, to the network node, an indication of whether connections between transmit chains of the UE and transmit antennas of the UE are reconfigurable. 
     
     
         23 . A network node for wireless communication, comprising:
 a memory; and   one or more processors, coupled to the memory, configured to:   receive, from a user equipment (UE), a bitmap associated with a subset of a set of transmit precoding matrix indicators (TPMIs), wherein each TPMI, of the set of TPMIs, supports a maximum transmit power for uplink communications according to a power class of the UE, and wherein at least one TPMI, of the set of TPMIs that support the maximum transmit power, is not represented by any individual bit of the bitmap; and   transmit, to the UE, an instruction to transmit using the maximum transmit power and a TPMI included in the set of TPMIs.   
     
     
         24 . The network node of  claim 23 , wherein the set of TPMIs that support the maximum transmit power includes more TPMIs than a number of TPMIs explicitly indicated by the UE, using the bitmap, as supporting the maximum transmit power. 
     
     
         25 . The network node of  claim 23 , wherein the at least one TPMI includes a TPMI in which all transmit chains of the UE are used. 
     
     
         26 . The network node of  claim 23 , wherein each bit in the bitmap corresponds to a single-layer TPMI. 
     
     
         27 . A method of wireless communication performed by a network node, comprising:
 receiving, from a user equipment (UE), a bitmap associated with a subset of a set of transmit precoding matrix indicators (TPMIs), wherein each TPMI, of the set of TPMIs, supports a maximum transmit power for uplink communications according to a power class of the UE, and wherein at least one TPMI, of the set of TPMIs that support the maximum transmit power, is not represented by any individual bit of the bitmap; and   transmitting, to the UE, an instruction to transmit using the maximum transmit power and a TPMI included in the set of TPMIs.   
     
     
         28 . The method of  claim 27 , wherein the set of TPMIs that support the maximum transmit power includes more TPMIs than a number of TPMIs explicitly indicated by the UE, using the bitmap, as supporting the maximum transmit power. 
     
     
         29 . The method of  claim 27 , wherein the at least one TPMI includes a TPMI in which all transmit chains of the UE are used. 
     
     
         30 . The method of  claim 27 , wherein each bit in the bitmap corresponds to a single-layer TPMI.

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