Patent Description:
<NUM>/NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT)), and other requirements. <NUM>/NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra reliable low latency communications (URLLC). Some aspects of <NUM>/NR may be based on the <NUM> Long Term Evolution (LTE) standard. There exists a need for further improvements in <NUM>/NR technology.

<CIT> relates to controlling transmit power in wireless communications. It can be determined, at a user equipment (UE), that communications with a base station are configured over a connection associated with a threshold reliability. Based at least in part on this determination, a con-figured transmit power can be adjusted to an adjusted transmit power for a transmission attempt over the connection. Data can then be transmitted at the adjusted transmit power.

<NPL>, summarizes the discussion on uplink power control.

<NPL>, discusses the issue of how to interpret the power control rule for synchronous non-adaptive retransmissions.

<NPL>, discusses further aspects of uplink power control.

Preferred embodiments of the invention are stipulated in the dependent claims. While several embodiments and/or examples have been disclosed in the description, the subject matter for which protection is sought is limited to those examples and/or embodiments which are encompassed by the scope of the appended claims. Embodiments and/or examples that do not fall under the scope of the claims are useful for understanding the invention.

Different transmissions on a same channel may have different reliability requirements. The present disclosure uniquely provides techniques for applying different power control adjustments for particular transmissions on a same channel.

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided for facilitating wireless communication at a UE. An example apparatus is configured to determine a first transmission power for a first transmission using a first transmission power control parameter. The example apparatus is also configured to transmit the first transmission using the first transmission power. Additionally, the example apparatus is configured to determine a second transmission power for a re-transmission using a second transmission power control parameter. Further, the example apparatus is configured to transmit the re-transmission using the second transmission power.

In another aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided for facilitating wireless communication at a base station. An example apparatus is configured to transmit a first power control command to a User Equipment (UE) for determining a first transmission power for a first transmission. The example apparatus is also configured to transmit a second power control command to the UE for determining a second transmission power for a re-transmission. Further, the example apparatus is configured to indicate a power offset to the UE for use in determining the second transmission power for the re-transmission.

The following description and the annexed drawings set forth in detail some illustrative features of the one or more aspects.

As used herein, the term computer-readable medium is expressly defined to include any type of computer readable storage device and/or storage disk and to exclude propagating signals and to exclude transmission media. As used herein, "computer-readable medium," "machine-readable medium," "computer-readable memory," and "machine-readable memory" are used interchangeably.

The base stations <NUM> configured for <NUM> LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC <NUM> through backhaul links <NUM> (e.g., S1 interface). The base stations <NUM> configured for <NUM>/NR (collectively referred to as Next Generation RAN (NG-RAN)) may interface with core network <NUM> through backhaul links <NUM>. The base stations <NUM> may communicate directly or indirectly (e.g., through the EPC <NUM> or core network <NUM>) with each other over backhaul links <NUM> (e.g., X2 interface).

Some UEs <NUM> may communicate with each other using device-to-device (D2D) communication link <NUM>.

A base station <NUM>, whether a small cell <NUM>' or a macrocell (e.g., macro base station), may include an eNB, gNodeB (gNB), or another type of base station. Some base stations <NUM>, such as a gNB, may operate in a traditional sub <NUM> spectrum, in millimeter wave (mmW) frequencies, and/or near mmW frequencies in communication with the UE <NUM>. When the gNB, e.g., base station <NUM>, operates in mmW or near mmW frequencies, the gNB may be referred to as an mmW base station. The mmW base station, e.g., base station <NUM>, may utilize beamforming <NUM> with the UE <NUM> to compensate for the extremely high path loss and short range.

Referring again to <FIG>, in some aspects, the UE <NUM> may be configured to apply different power control commands for particular transmissions on a same channel. As an example, in <FIG>, the UE <NUM> includes a transmission power component <NUM> configured to determine a first transmission power for a first transmission using a first transmission power control parameter. The example transmission power component <NUM> is also configured to transmit the first transmission using the first transmission power. Additionally, the example transmission power component <NUM> is configured to determine a second transmission power for a re-transmission using a second transmission power control parameter. Further, the example transmission power component <NUM> is configured to transmit the re-transmission using the second transmission power.

Referring still to <FIG>, in some aspects, the base station <NUM> may be configured to facilitate applying different power control commands for particular transmissions on a same channel. As an example, in <FIG>, the base station <NUM> includes a configuration component <NUM> configured to transmit a first power control command to a User Equipment (UE) for determining a first transmission power for a first transmission. The example configuration component <NUM> is also configured to transmit a second power control command to the UE for determining a second transmission power for a re-transmission. Further, the example configuration component <NUM> is configured to indicate a power offset to the UE for use in determining the second transmission power for the re-transmission.

Although the following description is focused on uplink communications, it should be appreciated that the concepts described herein may be applicable to sidelink communications and/or downlink communications. Furthermore, although the following description may be focused on <NUM>/NR, the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and/or other wireless technologies, in which it may be beneficial to apply different transmit powers for particular transmissions on a same channel.

The subcarrier spacing is <NUM> and symbol duration is approximately <NUM>.

At least one of the TX processor <NUM>, the RX processor <NUM>, and the controller/processor <NUM> of the UE <NUM> may be configured to perform aspects in connection with the transmission power component <NUM> of <FIG>.

At least one of the TX processor <NUM>, the RX processor <NUM>, and the controller/processor <NUM> may be configured to perform aspects in connection with the configuration component <NUM> of <FIG>.

Techniques for power control management may apply a power control (PC) command (sometimes referred to as a "power control adjustment" or a "power control correction") for transmissions communicated via specific channels to modify (or adjust) the transmission power of the transmissions. In some such examples, power control techniques may attempt to use a minimum power to enable a communication device (e.g., a UE) to adequately transmit a communication. In some examples, power control techniques may be used to adjust the transmission power for a particular channel. For example, a first power control setting (or parameter) may be used to adjust the transmission power for transmissions communicated via PUSCH. Transmissions communicated via other channels, such as PUCCH and/or SRS. may use different transmission powers. However, different transmissions on the same channel may have different reliability requirements. For example, a relatively high error rate target may be desirable for first transmissions (first Tx), while a relatively low error rate target may be acceptable for re-transmissions (ReTx). The higher error rate target of the first Tx may help a power control loop to converge relatively quickly. In contrast, the relatively low error rate target for the re-transmission(s) may cause the power control loop to converge more quickly than for the first Tx. This may lead to a problem in which the transmit power for one type of transmission, e.g., a re-transmission, may not be met by the transmit power for another type of transmission, e.g., a first Tx.

Aspects provided herein provide a solution to this problem by providing different power control for a first type of transmission and a second type of transmission on the same channel. For example, aspects presented herein may employ separate transmit power control settings (or parameters) for first transmissions and for re-transmissions that are communicated on a same channel. For example, disclosed techniques include a UE determining a UE transmit power for the UE by enabling accumulating transmission power for first transmission(s), and determining a UE transmit power for the UE by disabling (or without) accumulating transmission power for re-transmission(s). Additionally, a separate power boost may be applied to the re-transmission(s), e.g., in order to improve convergence and/or to meet the lower error rate targets.

In some examples, the UE transmit power of the UE (PTx) (sometimes referred to herein as "transmission power") may be a function of a closed loop power control mode using transmission power accumulation based on a previous transmission power (e.g., is a function of a previous UE transmit power) and a power control command provided by the base station (sometimes referred to as an "accumulating power control mode"). The closed loop power control mode may help to address short term channel variation that may be problematic with an open loop power control mode. In some examples, the UE transmit power of the UE may be a function of a closed loop power control mode without using transmission power accumulation based on a previous transmission power (sometimes referred to as a "non-accumulating power control mode" or an "absolute power control mode"). The closed loop power control mode with transmission power accumulation disabled may allow for application of a relatively larger power boost to ensure reliability, e.g., for a type of transmission. By disabling transmission power accumulation for one type of transmission, a power boost may be applied without interfering with the different power control target levels of a different type of transmission on the same channel. It should be appreciated that in different aspects, different power offsets may be achieved by configuring different receiver sensitivity values for first transmission and re-transmissions. The power offset may include a power boost for first transmissions or for re-transmissions.

In some examples, different transmit power for different types of transmissions may be determined based on configured target transmit power information. For example, a UE may receive a first configured target transmit power for a first transmission and may receive a second configured target transmit power for a re-transmission. In some examples, the first configured target transmit power and the second configured target transmit power may be received via RRC signaling. For example, the first configured target transmit power and the second configured target transmit power may be provided by a base station to the UE during an initial RRC configuration. In some examples, the configured target transmit power may also be re-configured (e.g., at a later time, such as after the initial configuration). For example, the first configured target transmit power and/or the second configured target transmit power may be reconfigured via RRC signaling and/or MAC-CE.

Although the following describe provides examples in which a first transmission is transmitted following a re-transmission, it should be appreciated that the re-transmission is not limited to a particular re-transmission of the transmission. That is, unless indicated otherwise, it should be appreciated that a reference to a re-transmission may refer to a first occurrence of a re-transmission, a second occurrence of a re-transmission, etc..

<FIG> is a flow diagram <NUM> illustrating example aspects of applying different power control commands for particular transmissions communicated on a same channel (e.g., by a UE). The illustrated example of <FIG> may be applied for different types of transmissions on any channel (e.g., different types of transmissions on PUSCH, different types of transmissions on PUCCH, etc.). In <FIG>, the example aspects are described using a first transmission and re-transmission(s) as the two types of transmission. The first transmission(s) and the re-transmission(s) may both be PUSCH transmissions, for example. In some examples, the UE may receive the power control commands via Downlink Control Information (DCI). In some examples, the UE may receive the power control commands via RRC signaling, such as via an RRC message.

In the illustrated example of <FIG>, the UE applies transmission power accumulation for first transmissions and does not accumulate transmission power for re-transmissions. Thus, a transmission power control accumulation parameter (or setting) may be enabled for first transmission type communications and the transmission power control accumulation parameter (or setting) may disabled for re-transmission type communications. Accumulation of transmission power control may be indicated by a parameter, e.g., tpc-Accumulation, which may be enabled for one type of transmission on a channel (e.g., a first transmission), and may disabled for another type of transmission (e.g., a re-transmission), on the same channel.

As shown in <FIG>, the UE receives a first power control command for a first transmission at a first time (T1) (PCC<NUM>). At a second time (T2), the UE determines a first UE transmit power (PTx<NUM>) based on the first power control command (PCC<NUM>) received at the first time (T1) and any accumulated transmission power (Pacc<NUM>) for a communication (e.g., the first transmission). The UE may also transmit the first transmission using the determined first UE transmit power (PTx<NUM>) at the second time (T2). As shown in <FIG>, the UE may also update the value of the accumulated transmission power (Pacc) based on the first UE transmit power. For example, the UE may update the accumulated transmission power (Pacc) so that a next accumulated transmission power (Pacc<NUM>) equals the first UE transmit power (PTx<NUM>).

As shown in <FIG>, at a later third time (T3), the UE receives a second power control command (PCC<NUM>) for a re-transmission of the first transmission (e.g., the transmission transmitted at the second time (T2). The UE then determines, at a fourth time (T4), a second UE transmit power (PTx<NUM>) for the re-transmission. For example, similar to the determination of the first UE transmit power (PTx<NUM>), the UE may determine the UE transmit power for the re-transmission (e.g., second UE transmit power (PTx<NUM>)) based on a current accumulated transmission power and a current power control command. In the illustrated example, the second UE transmit power (PTx<NUM>) is equal to the sum of the current accumulated transmission power (e.g., the first accumulated transmission power (Pacc<NUM>)) and the current power control command (e.g., the second power control command (PCC<NUM>))At the fourth time (T4), the UE may also transmit the re-transmission using the determined second UE transmit power (PTx<NUM>). However, because the transmission power control accumulation parameter is disabled for re-transmissions in this example, the UE does not update the value of the accumulated transmission power (Pacc) based on the second UE transmit power (PTx<NUM>). That is, in the illustrated example, value of the accumulated transmission power (Pacc) does not change and the value of the subsequent accumulated transmission power (Pacc<NUM>)remains the same as the first accumulated transmission power (Pacc<NUM>)).

As noted above, it should be appreciated that the re-transmission communicated at the fourth time (T<NUM>) may be a first re-transmission, may be a second re-transmission, etc. of, for example, the first transmission communicated at the second time (T2).

At a later, fifth time (T<NUM>), the UE receives a third power control command (PCC<NUM>) for another first transmission. At a sixth time (T6), the UE determines a third UE transmit power (PTx<NUM>) based on the current power control command (e.g., the third power control command (PCC<NUM>) received at time (T<NUM>) and the current accumulated transmission power (e.g., the second accumulated transmission power (Pacc<NUM>), which did not change in value (e.g., was not accumulated) based on the transmit power of the re-transmission at the fourth time (T4) (e.g., the second UE transmit power (PTx<NUM>). The UE transmits the current first transmission using the determined third UE transmit power (PTx<NUM>) that was determined at the sixth time (T6). The UE also updates the value of the accumulated transmission power (Pacc) based on the third UE transmit power (PTx<NUM>). For example, the UE may update the accumulated transmission power (Pacc) so that a next accumulated transmission power (Pacc<NUM>) equals the third UE transmit power (PTx<NUM>).

Similarly, at a later seventh time (T<NUM>), the UE receives another power control command (PCC<NUM>) for another first transmission. At an eighth time (T8), the UE determines a fourth UE transmit power (PTx<NUM>) based on the current power control command (e.g., the fourth power control command (PCC<NUM>) received at seventh time (T<NUM>) and the current accumulated transmission power (e.g., the third accumulated transmission power (Pacc<NUM>)). The UE transmits the current first transmission using the determined fourth UE transmit power (PTx<NUM>) that was determined at the eighth time (T8). The UE may also update the value of the accumulated transmission power (Pacc) based on the fourth UE transmit power (PTx<NUM>). For example, the UE may update the accumulated transmission power (Pacc) so that a next accumulated transmission power (Pacc<NUM>) equals the fourth UE transmit power (PTx<NUM>).

In this manner, the UE may apply different power control commands for different types of communications (e.g., first transmissions and re-transmissions) that are communicated on a same channel. Although a single re-transmission is described in connection with the example of <FIG>, in order to illustrate the principle of using different power control for first transmissions and for re-transmissions, it should be appreciated that the disclosed principles can be extended to any number and pattern of first transmissions and re-transmissions. For example, the UE may determine a transmission power for multiple re-transmissions between the first transmission at the second time (T2) and the first transmission at the sixth time (T6). Similarly, at least one re-transmission may be transmitted between the sixth time (T6) and the eighth time (T8).

<FIG> is a diagram <NUM> illustrating another example of applying different power control commands for particular transmissions communicated on a same channel (e.g., by a UE). In the illustrated example, the Similar to the first transmissions of the example flow diagram <NUM> of <FIG>, a UE transmit power (PTx) for a first transmission may be based on a power control command received from a base station and a current accumulated transmission power (Pacc). For example, in the illustrated example, the UE receives a power control command (PCC<NUM>) for a first transmission at a first time (T1) and also receives a power control command (PCC<NUM>) for another first transmission at a later fifth time (T<NUM>). Following the transmissions of the respective first transmissions (e.g., at a second time (T2) and a sixth time (T6)), the UE updates the respective accumulated transmission power (Pacc) based on the UE transmit power used for transmitting the respective first transmission. For example, at the second time (T2), the UE may update the value of the next accumulated transmission power (Pacc<NUM>) to equal the first UE transmit power (PTx<NUM>), and at the sixth time (T6), the UE may update the value of the next accumulated transmission power (Pacc<NUM>) to equal the third UE transmit power (PTx<NUM>).

In some examples, the power control command for a re-transmission (e.g., a second power control command (PCC<NUM>) received at a third time (T3)) may include a power boost indicated to the UE (e.g., by a base station). For example, the power boost may be received via RRC signaling, such as via an RRC message. The power boost may be a configurable power boost (or offset) based on, for example, a bit rate or a transmit format. In some such examples, the UE may determine the UE transmit power (PTx) for transmitting the re-transmission based on the current accumulated transmission power (Pacc), the current power control command (PCC), and the power boost. For example, as shown in <FIG>, at the fourth time (T4), the UE may determine the second UE transmit power (PTx<NUM>) as a sum of the first accumulated transmission power (Pacc<NUM>), the second power control command (PCC<NUM>), and the power boost.

After transmitting the re-transmission at the determined second UE transmit power (PTx<NUM>) at the fourth time (T4), the UE may then update the subsequent accumulated transmission power (Pacc) based on the second UE transmit power (PTx<NUM>) and the power boost. For example, at the fourth time (T4), the UE may set the subsequent accumulated transmission power (Pacc<NUM>) by subtracting the applied power boost from the second UE transmit power (PTx<NUM>).

Similar to the example in <FIG>, the transmission power for the re-transmission in <FIG> might not be accumulated. In the example of <FIG>, the when the transmission power control accumulation parameter is disabled (e.g., for the re-transmission), then the value of the subsequent accumulated transmission power (Paccn+<NUM>) is the same as the value of the current accumulated transmission power (Paccn). However, in some examples, a power control command (PCC) may include a parameter (or flag) to indicate (e.g., dynamically indicate) to the UE whether the UE is to update the accumulated transmission power (Pacc) based on the power boost and/or to determine the UE transmit power for a particular type of transmission (e.g., a re-transmission) based on the power boost. For example, when a power boost parameter is enabled, the UE may determine a current UE transmit power (PTx) (e.g., for a re-transmission) based on the current accumulated transmission power (Pacc), the current power control command (PCC), and the power boost. Additionally or alternatively, the UE may update the accumulated transmission power (Pacc) so that the determining of the subsequent accumulated transmission power removes the applied power boost (as shown in the determination of the second accumulated transmission power (Pacc<NUM>) at the fourth time (T4) of <FIG>).

In contrast, when the power boost parameter is not enabled, the UE may not determine a current UE transmit power (PTx) (e.g., for a re-transmission) based on a power boost (as shown in the determination of the second UE transmit power (PTx<NUM>) at the fourth time (T4) of <FIG>). Additionally or alternatively, when the power boost parameter is not enabled (e.g., disabled), the UE may update the accumulated transmission power (Pacc) without taking into consideration any power boost. For example, the UE may update the subsequent accumulated transmission power without removing any power boost (as shown in the determination of the second accumulated transmission power (Pacc<NUM>) at the fourth time (T4) of <FIG>).

Thus, it should be appreciated that in some examples, a transmission power control accumulation parameter may be enabled or disabled for a particular type of communication (e.g., a first transmission, a re-transmission, etc.). Additionally, in some examples, a power boost parameter may be enabled or disabled for a particular type of communication (e.g., a first transmission, a re-transmission, etc.). Furthermore, in some examples, the value of the transmission power control accumulation parameter and/or the power boost parameter (indicating whether the respective parameter is enabled or disabled) may be received via RRC signaling.

In some examples (not shown in <FIG>), the UE may receive power boost configuration information (e.g., from the base station) at a first point in time and then apply the respective power boost when determining the UE transmit power for a re-transmission. In some such examples, the UE may determine the UE transmit power for a subsequent first transmission without applying the respective power boost (as shown at the sixth time (T6) of <FIG>). In this manner, the UE may apply different power control commands for first transmissions and for re-transmissions on a same channel. Furthermore, the UE may not receive a power boost (e.g., power boost configuration information) for each re-transmission.

In some examples, the UE may receive a power control command (e.g., from the base station) and then translate the received power control command to different power control commands for different types of communications. For example, the power control command received from the base station may be a value (such as a two-bit value). In some such examples, the UE may access a data structure (such as a look-up table) that enables the UE to map the received power control command value to a first power control command when determining the UE transmit power for a first transmission. When determining the UE transmit power for a re-transmission, the data structure may enable the UE to map the same received power control command value to a second power control command. Additionally, the data structure may enable the UE to map the same received power control command value to a third and/or fourth power control command for any number of subsequent re-transmissions.

It should be appreciated that in some examples, the power control command received by the UE may correspond to a configured target transmit power. The configured target transmit power may include a target transmit power that is configured for the UE for particular types of communication. For example, the base station may transmit the configured target transmit power to the UE. In some examples, the configured target transmit power may include a first configured target transmit power for a first transmission and a second configured target transmit power for a re-transmission. In some examples, the UE may receive the configured target transmit powers via RRC signaling, such as in an RRC message. For example, the UE may receive the configured target transmit power during an initial RRC configuration from the base station. In some examples, one or more configured target transmit powers may be reconfigured at a later time. For example, the UE may receive a reconfigured target transmit power for a first transmission and/or a re-transmission via RRC signaling, such as in an RRC message, and/or via MAC-CE signaling.

<FIG> is a diagram <NUM> illustrating a call flow diagram between a UE <NUM> and a base station <NUM> in which the UE applies different power control commands for particular transmissions on a same channel. Aspects of the UE <NUM> may be implemented by the UE <NUM> of <FIG> and/or the UE <NUM> of <FIG>. Aspects of the base station <NUM> may be implemented by the base station <NUM> of <FIG> and/or the base station <NUM> of <FIG>. In this example, the UE transmission power (PTx) for a first transmission or a re-transmission may be based on an accumulated transmission power (Pacc) and a power control command (PCC) provided by the base station <NUM>. For example, the transmission power control accumulation parameter may be enabled for a first transmission and the transmission power control accumulation parameter may be disabled for a re-transmission (as described in connection with the examples of <FIG> and <FIG>).

At <NUM>, the UE <NUM> determines a first transmission power (or first UE transmit power) for a first transmission <NUM>. After determining the first transmission power (PTx<NUM>) for the first transmission, the UE <NUM> transmits the first transmission <NUM> to the base station <NUM> at the determined first transmission power (PTx<NUM>). At <NUM>, because accumulating transmission power for first transmissions is enabled in this example, the UE <NUM> updates the accumulated transmission power (Pacc<NUM>) based on the first transmission power (PTx<NUM>) (determined at <NUM>). For example, the UE <NUM> may update the value of the accumulated transmission power (Pacc<NUM>) to be the determined first transmission power (PTx<NUM>) (as shown at the second time (T2) in <FIG>).

At <NUM>, the UE <NUM> determines a second transmission power (PTx<NUM>) for a re-transmission <NUM>. After determining the second transmission power (PTx<NUM>) for the re-transmission, the UE <NUM> transmits the re-transmission <NUM> to the base station <NUM> at the determined second transmission power (PTx<NUM>). At <NUM>, because accumulating transmission power for re-transmissions is disabled in this example, the UE <NUM> might not change value of the accumulated transmission power (Pacc<NUM>) based on the determined transmission power (PTx<NUM>) such that the value of the subsequent accumulated transmission power (Pacc<NUM>) is the same as the current accumulated transmission power (Pacc<NUM>) (as shown at the fourth time (T4) in <FIG>).

At <NUM>, the UE <NUM> determines a third transmission power (PTx<NUM>) for another first transmission <NUM>. After determining the third transmission power (PTx<NUM>) for the other first transmission <NUM>, the UE <NUM> transmits the other first transmission <NUM> to the base station <NUM> at the determined third transmission power (PTx<NUM>). At <NUM>, because accumulating transmission power for first transmissions is enabled in this example, the UE <NUM> updates the accumulated transmission power (Pacc<NUM>) based on the determined third transmission power (PTx<NUM>) (as shown at the sixth time (T6) and the eighth time (T8) in <FIG>).

Although not shown, it should be appreciated that in various aspects, the base station <NUM> may provide the UE <NUM> a power control command prior to the UE <NUM> determining the transmission power for a first transmission or a re-transmission (as shown at the first time (T1) in <FIG>).

In some examples, the base station <NUM> may provide the UE <NUM> with power boost configuration information <NUM> including a configurable power boost. For example, the base station <NUM> may provide the UE <NUM> with power boost configuration information prior to providing the UE <NUM> with a power control command to adjust the UE transmission power of a transmission. In other examples, the base station <NUM> may provide the UE <NUM> with power boost configuration information in addition to the power control command for determining the UE transmission power of a transmission.

In some such examples in which the base station <NUM> provides the UE <NUM> with the power boost configuration information <NUM>, the UE <NUM> may use the power boost when determining the UE transmission power for a re-transmission at <NUM> and may not use the power boost when determining the UE transmission power for a first transmission. For example, the UE <NUM> may determine the UE transmission power for a re-transmission as a function of an accumulated transmission power, the power control command, and the power boost.

After transmitting the re-transmission at the determined transmission power (with power boost), the UE <NUM> may update the accumulated transmission power, as described in connection with <FIG>. For example, the UE <NUM> may transmit the re-transmission <NUM> and may then update, at <NUM>, the second accumulated transmission power (Pacc<NUM>) as a function of the determined second transmission power (PTx<NUM>) and the applied power boost (such as by subtracting the applied power boost from the determined second transmission power (PTx<NUM>)) (as shown at the fourth time (T4) in <FIG>). In other examples, when determining the second accumulated transmission power (Pacc<NUM>) after transmitting the re-transmission <NUM>, the UE <NUM> may set the second accumulated transmission power (Pacc<NUM>) to equal the first accumulated transmission power (Pacc<NUM>) (as described in connection with the fourth time (T4) in <FIG>).

<FIG> is a flowchart <NUM> of a method of wireless communication. The method may be performed by a UE (e.g., the UE <NUM>, the UE <NUM>, the UE <NUM>, the UE <NUM>, and/or the apparatus <NUM>/<NUM>'). Optional aspects are illustrated with a dashed line. The method provides for improved power control that uniquely meets the needs of different types of transmissions on a same channel.

At <NUM>, the UE determines a first transmission power (PTx<NUM>) for a first transmission using first transmission power control parameters, e.g., as described at <NUM> of <FIG>. For example, a first power control component <NUM> of the apparatus <NUM> may facilitate determining the first transmission power for the first transmission. In some examples, the first transmission power control parameters may indicate whether accumulation of transmission power control is enabled or disabled for different types of communication (e.g., a first transmission, a re-transmission, etc.). For example, a transmission power control accumulation parameter may be enabled for first transmissions and the transmission power control accumulation parameter may be disabled for re-transmissions (as described in the example flow diagrams <NUM>, <NUM> of <FIG> and <FIG>, respectively). In some examples, the determining of the first transmission power may be based on an accumulated transmission power (Pacc) and a power control command (PCC<NUM>), as described in connection with <FIG> and <FIG>. In some examples, the UE may determine the first transmission power (PTx<NUM>) using a closed loop power control mode using transmission power accumulation based on a previous transmission power.

At <NUM>, the UE transmits the first transmission using the first transmission power (PTx<NUM>), e.g., as described at <NUM> of <FIG>. For example, a transmission component <NUM> of the apparatus <NUM> may facilitate the transmitting of the first transmission using the first transmission power (PTx<NUM>). In some examples, the first transmission power control parameters may enable the accumulation of the transmission power based on the first transmission power. For example, the transmission power control accumulation parameter may be enabled for first transmission, which enable the accumulation of the transmission power for the first transmission. In some such examples, the UE may update the accumulated transmission power based on the first transmission power, e.g., such as described in connection with the first accumulated transmission power (Pacc<NUM>) at the second time (T2) of <FIG> and <FIG>. For example, an accumulated transmission power determination component <NUM> of <FIG> may facilitate the updating of the accumulated transmission power.

At <NUM>, the UE determines a second transmission power (PTx<NUM>) for a re-transmission using second transmission power control parameters, e.g., as described at <NUM> of <FIG>. For example, a second power control component <NUM> of the apparatus <NUM> may facilitate the determining of the second transmission power (PTx<NUM>) for the re-transmission. In some examples, the UE may determine the second transmission power using a second power control command (PCC<NUM>), as described at the fourth time (T<NUM>) of <FIG> and <FIG>. In some examples, the UE may determine the second transmission power (PTx<NUM>) based on a power control command (PCC) received separately from a power control command associated with the determining of the first transmission power, as shown at the third times (T3) of <FIG> and <FIG>. The UE determines the second transmission power (PTx<NUM>) based on a power boost, e.g., such as described in connection with <FIG>. In some examples, the power boost may be a configurable power boost. The UE receives the power boost in DCI (such as from a base station), e.g., as illustrated at <NUM>. For example, a reception component <NUM> of the apparatus <NUM> may facilitate the receiving of the power boost. In some examples, the UE may receive the power boost in an RRC message (such as from a base station).

At <NUM>, the UE <NUM> transmits the re-transmission using the second transmission power (PTx<NUM>), e.g., as described at <NUM> of <FIG>. For example, the transmission component <NUM> of the apparatus <NUM> may facilitate the transmitting of the re-transmission using the second transmission power (PTx<NUM>). In some examples, the second transmission power control parameters may include the transmission power control accumulation parameter set to disabled to prevent the updating of the accumulating transmission power used to determine the second transmission power (i.e., a non-accumulating power control mode). In some such examples, the UE may not change the value of the subsequent accumulated transmission power after transmitting the re-transmission using the second transmission power (PTx<NUM>). Thus, similar to the example, at the second time (T2) in <FIG>, the value of the second accumulated transmission power (Pacc<NUM>) is the same as the first accumulated transmission power (Pacc<NUM>). In some examples in which the UE determines the second transmission power (PTx<NUM>) based on a power boost, the UE may update the value of accumulating transmission power by subtracting the applied power boost, e.g., as described in connection with the fourth time (T<NUM>) of <FIG>. For example, the accumulated transmission power determination component <NUM> of <FIG> may facilitate the updating of the accumulated transmission power.

As illustrated at <NUM>, the UE may determine a third transmission power (PTx<NUM>) for another first transmission subsequent to the re-transmission. The UE may determine the third transmission power (PTx<NUM>) for another first transmission following the re-transmission, wherein the third transmission power (PTx<NUM>) comprises an accumulated transmission power and is determined without accumulation based on the configured power boost. Thus, it should be appreciated that the transmission power control parameters may be set for particular types of communications (e.g., the transmission power control accumulation parameter may be enabled for first transmissions and the transmission power control accumulation parameter may be disabled for re-transmission) and/or the transmission power control parameters may be set for particular ones of the communications. For example, the transmission power control accumulation parameter may be enabled for a current first transmission and the transmission power control accumulation parameter may be disabled for a subsequent first transmission.

<FIG> is a conceptual data flow diagram <NUM> illustrating the data flow between different means/components in an example apparatus <NUM>. The apparatus may be a UE, such as the UE <NUM>, the UE <NUM>, the UE <NUM>, the UE <NUM>, and/or the apparatus <NUM>/<NUM>'. The apparatus includes a reception component <NUM>, a first power control component <NUM>, a second power control component <NUM>, a transmission component <NUM>, and an accumulated transmission power determination component <NUM>. In this example, the apparatus <NUM> is in communication with a base station <NUM>.

The reception component <NUM> is configured to receive downlink communications from the base station <NUM> (as described in connection with, for example, <NUM> of <FIG>). In this example, the received downlink communications may include a power control command to adjust the transmission power of communications transmitted by the apparatus <NUM>. In some examples, the reception component <NUM> may be configured to receive the power control command via RRC signaling, such as an RRC message. However, it should be appreciated that in additional or alternative aspects, the received downlink communications may include other information, such as a configured power boost, and/or a configured target transmit power. In some examples, the reception component <NUM> may be configured to receive the configured power boost and/or the configured target transmit power via DCI. In some examples, the reception component <NUM> may be configured to receive the configured power boost and/or the configured target transmit power via an RRC message. In some examples, the reception component <NUM> may be configured to receive the configured power boost and/or the configured target transmit power via a MAC-CE.

The first power control component <NUM> may be configured to determine a transmission power for a first transmission using first transmission power control parameters (as described in connection with, for example, <NUM> of <FIG>). In some examples, the first power control component <NUM> may be configured to determine the transmission power for the first transmission based on an accumulated transmission power and the power control command.

The second power control component <NUM> may be configured to determine a transmission power for a re-transmission using second transmission power control parameters (as described in connection with, for example, <NUM> of <FIG>). In some examples, the second power control component <NUM> may be configured to determine the transmission power for the re-transmission based on an accumulated transmission power and the power control command. In some examples, the second power control component <NUM> may be configured to determine the transmission power for the re-transmission based on an accumulated transmission power, the power control command, and a power boost.

The transmission component <NUM> may be configured to transmit uplink communications to the base station <NUM> (as described in connection with, for example, <NUM> and <NUM> of <FIG>). In some examples, the transmitted uplink communication may comprise a first transmission and the transmission component <NUM> may be configured to transmit the first transmission at a UE transmit power based on the transmission power for a first transmission. In some examples, the transmitted uplink communication may be a re-transmission and the transmission component <NUM> may be configured to transmit the re-transmission at a UE transit power based on the transmission power for a re-transmission.

The accumulated transmission power determination component <NUM> may be configured to update the accumulated transmission power (Pacc) after the transmission component <NUM> transmits the uplink communication (as described above in connection with, for example, <NUM> and <NUM> of <FIG>). In some examples, the accumulated transmission power determination component <NUM> may be configured to update the accumulated transmission power based on whether the transmission power control accumulation parameter is enabled for a particular type of communication (e.g., a first transmission, a re-transmission, etc.) and/or a particular communication (e.g., a current first transmission, a subsequent first transmission, a first re-transmission, a second re-transmission, etc.). For example, when the transmission power control accumulation parameter is enabled, the accumulated transmission power determination component <NUM> may be configured to employ the accumulating power control mode by updating the accumulated transmission power based on the UE transmit power.

In some examples in which the transmission power control accumulation parameter is disabled, the accumulated transmission power determination component <NUM> may be configured to employ the non-accumulating power control mode by not changing the accumulated transmission power. In some examples in which the transmission power control accumulation parameter is disabled and a power boost parameter is enabled, the accumulated transmission power determination component <NUM> may be configured to update the accumulated transmission power by subtracting an applied power boost.

<FIG> is a diagram <NUM> illustrating an example of a hardware implementation for an apparatus <NUM>' employing a processing system <NUM>. The processing system <NUM> may be implemented with a bus architecture, represented generally by the bus <NUM>. The bus <NUM> may include any number of interconnecting buses and bridges depending on the specific application of the processing system <NUM> and the overall design constraints. The bus <NUM> links together various circuits including one or more processors and/or hardware components, represented by the processor <NUM>, the components <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and the computer-readable medium / memory <NUM>. The bus <NUM> may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.

The processing system <NUM> may be coupled to a transceiver <NUM>. The transceiver <NUM> is coupled to one or more antennas <NUM>. The transceiver <NUM> provides a means for communicating with various other apparatus over a transmission medium. The transceiver <NUM> receives a signal from the one or more antennas <NUM>, extracts information from the received signal, and provides the extracted information to the processing system <NUM>, specifically the reception component <NUM>. In addition, the transceiver <NUM> receives information from the processing system <NUM>, specifically the transmission component <NUM>, and based on the received information, generates a signal to be applied to the one or more antennas <NUM>. The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium / memory <NUM>. The processor <NUM> is responsible for general processing, including the execution of software stored on the computer-readable medium / memory <NUM>. The software, when executed by the processor <NUM>, causes the processing system <NUM> to perform the various functions described supra for any particular apparatus. The computer-readable medium / memory <NUM> may also be used for storing data that is manipulated by the processor <NUM> when executing software. The processing system <NUM> further includes at least one of the components <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. The components may be software components running in the processor <NUM>, resident/stored in the computer readable medium / memory <NUM>, one or more hardware components coupled to the processor <NUM>, or some combination thereof. The processing system <NUM> may be a component of the UE <NUM> and may include the memory <NUM> and/or at least one of the TX processor <NUM>, the RX processor <NUM>, and the controller/processor <NUM>. Alternatively, the processing system <NUM> may be the entire UE (e.g., see the UE <NUM> of <FIG>).

In one configuration, the apparatus <NUM>/<NUM>' for wireless communication includes means for determining a first transmission power for a first transmission using a first transmission power control parameter. The example apparatus <NUM>/<NUM>' may also include means for transmitting the first transmission using the first transmission power. The example apparatus <NUM>/<NUM>' may also include means for determining a second transmission power for a re-transmission using a second transmission power control parameter. The example apparatus <NUM>/<NUM>' may also include means for transmitting the re-transmission using the second transmission power. In some configurations, the example apparatus <NUM>/<NUM>' may include means for receiving a configured power offset for the re-transmission, where the second transmission power for the re-transmission is determined based on the configured power offset. In some configurations, the example apparatus <NUM>/<NUM>' may include means for determining a third transmission power for another first transmission following the re-transmission, where the third transmission power comprises an accumulated transmission power and is determined without accumulation based on the configured power offset. In some configurations, the example apparatus <NUM>/<NUM>' may include means for receiving a first configured target transmit power for the first transmission, where the first transmission power for the first transmission is determined based on the first configured target transmit power. The example apparatus <NUM>/<NUM>' may also include means for receiving a second configured target transmit power for the re-transmission, where the second transmission power for the re-transmission is determined based on the second configured target transmit power. In some configurations, the example apparatus <NUM>/<NUM>' may include means for reconfiguring at least one of a first configured target transmit power and a second configured target transmit power via a Radio Resource Configuration (RRC) message or Medium Access Control - Control Element (MAC-CE) signaling. In some configurations, the example apparatus <NUM>/<NUM>' may include means for receiving a separate power control command for the first transmission and the re-transmission. In some configurations, the example apparatus <NUM>/<NUM>' may include means for determining a third transmission power for another first transmission following the re-transmission, wherein the third transmission power comprises an accumulated transmission power and is determined without accumulation of a transmission power command for the re-transmission.

<FIG> is a flowchart <NUM> of a method of wireless communication. The method may be performed by a base station (e.g., the base station <NUM>, the base station <NUM>, the base station <NUM>, the base station <NUM>, the base station <NUM>, and/or the apparatus <NUM>/<NUM>'). Optional aspects are illustrated with a dashed line. The method provides for improved power control that uniquely meets the needs of different types of transmissions on a same channel.

At <NUM>, the base station <NUM> transmits a first power control command to a UE for determining a first transmission power for a first transmission, as described at the first times (T1) of <FIG> and <FIG>. For example, a first transmission power control component <NUM> of apparatus <NUM> may be configured to facilitate the determining of a first power control command and a transmission component <NUM> of the apparatus <NUM> may be configured to facilitate the transmitting of the first power control command. In some examples, the base station may determine and transmit the first power control command based on a transmission power received from the UE. In some examples, the first power control command may include power boost configuration information. In some examples, the first power control command may include a configured target transmit power. In some examples, the first power control command may include settings for transmission power control parameters, such as whether a transmission power control accumulation parameter is enabled or disabled, and/or whether a power boost parameter is enabled or disabled.

At <NUM>, the base station transmits a second power control command to the UE for determining a second transmission power for a re-transmission, as described at the third times (T3) of <FIG> and <FIG>. For example, a second power control component <NUM> of the apparatus <NUM> may be configured to facilitate determining the second power control command and the transmission component <NUM> may be configured to facilitate the transmitting of the second power control command. In some examples, the base station may determine and transmit the second power control command based on a transmission power received from the UE. In some examples, the base station may determine and transmit the second power control command separate from the determining and transmitting of the first power control command.

At <NUM>, the base station indicates a power boost to the UE for use in determining the second transmission power for the re-transmission, as described at <NUM> of <FIG>. For example, a power boost determination component <NUM> of the apparatus <NUM> may be configured to facilitate the indicating of the power boost to the UE. In some examples, the power boost may comprise a configurable power boost. In some examples, the base station may indicate the power boost by transmitting the power boost in DCI to the UE. In some examples, the base station may indicates the power boost by transmitting the power boost in an RRC message to the UE.

<FIG> is a conceptual data flow diagram <NUM> illustrating the data flow between different means/components in an example apparatus <NUM>. The apparatus may be a base station, such as the base station <NUM>/<NUM>, the base station <NUM>, the base station <NUM>, the base station <NUM>, and/or the apparatus <NUM>/<NUM>'. The apparatus <NUM> includes a reception component <NUM>, a first transmission power control component <NUM>, a re-transmission power control component <NUM>, a transmission component <NUM>, and a power boost determination component <NUM>. In this example, the apparatus <NUM> is in communication with a UE <NUM>.

The reception component <NUM> is configured to receive uplink communications from the UE <NUM>. In some aspects, the received uplink communications include a UE transmit power associated with the received uplink communications.

The first transmission power control component <NUM> may be configured to determine a first power control command for the UE <NUM> for determining a first transmission power for a first transmission (e.g., as described in connection with, for example, <NUM> of <FIG>). In some examples, the first transmission power control component <NUM> may be configured to determine the first power control command based on, for example, the UE transmit power, an estimated path loss, a UE-specific offset, a power offset term to account for different modulation and/or coding, etc. for the first transmission based on an accumulated transmission power and the power control command.

The re-transmission power control component <NUM> may be configured to determine a second power control command for the UE <NUM> for determining a second transmission power for a re-transmission (e.g., as described in connection with, for example, <NUM> of <FIG>). In some examples, the re-transmission power control component <NUM> may be configured to determine the second power control command based on, for example, the UE transmit power, an estimated path loss, a UE-specific offset, a power offset term to account for different modulation and/or coding, etc. for the re-transmission based on an accumulated transmission power and the power control command.

The transmission component <NUM> may be configured to transmit downlink communications to the UE <NUM> (e.g., as described in connection with, for example, <NUM> and <NUM> of <FIG>). In some examples, the transmitted downlink communication may comprise a power control command to adjust a subsequent first transmission transmit by the UE <NUM>. In some examples, the transmitted downlink communication may comprise a power control command to adjust a re-transmission to be communicated by the UE <NUM>.

The power boost determination component <NUM> may be configured to indicate a power boost to the UE <NUM> for use in determining the second transmission power for the re-transmission (e.g., as described in connection with, for example, <NUM> of <FIG>). In some examples, the power boost may comprise a configurable power boost. In some examples, the power boost may comprise an absolute transmission power adjustment. In some examples, the power boost determination component <NUM> may be configured to determine the power boost based on, for example, the UE transmit power, an estimated path loss, a UE-specific offset, a power offset term to account for different modulation and/or coding, etc. for the re-transmission based on an accumulated transmission power and the power control command.

In some examples, the power boost determination component <NUM> may be configured to indicate the power boost by transmitting the power boost in DCI to the UE <NUM>. In some examples, the power boost determination component <NUM> may be configured to indicate the power boost by transmitting the power boost in an RRC message to the UE <NUM>.

The processing system <NUM> may be coupled to a transceiver <NUM>. The transceiver <NUM> is coupled to one or more antennas <NUM>. The transceiver <NUM> provides a means for communicating with various other apparatus over a transmission medium. The transceiver <NUM> receives a signal from the one or more antennas <NUM>, extracts information from the received signal, and provides the extracted information to the processing system <NUM>, specifically the reception component <NUM>. In addition, the transceiver <NUM> receives information from the processing system <NUM>, specifically the transmission component <NUM>, and based on the received information, generates a signal to be applied to the one or more antennas <NUM>. The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium / memory <NUM>. The processor <NUM> is responsible for general processing, including the execution of software stored on the computer-readable medium / memory <NUM>. The software, when executed by the processor <NUM>, causes the processing system <NUM> to perform the various functions described supra for any particular apparatus. The computer-readable medium / memory <NUM> may also be used for storing data that is manipulated by the processor <NUM> when executing software. The processing system <NUM> further includes at least one of the components <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. The components may be software components running in the processor <NUM>, resident/stored in the computer readable medium / memory <NUM>, one or more hardware components coupled to the processor <NUM>, or some combination thereof. The processing system <NUM> may be a component of the base station <NUM> and may include the memory <NUM> and/or at least one of the TX processor <NUM>, the RX processor <NUM>, and the controller/processor <NUM>. Alternatively, the processing system <NUM> may be the entire base station (e.g., see the base station <NUM> of <FIG>).

In one configuration, the apparatus <NUM>/<NUM>' for wireless communication includes means for transmitting a first power control command to a UE for determining a first transmission power for a first transmission. The example apparatus <NUM>/<NUM>' also includes means for transmitting a second power control command to the UE for determining a second transmission power for a re-transmission. The example apparatus <NUM>/<NUM>' also includes means for indicating a power offset to the UE for use in determining the second transmission power for the re-transmission. In some configurations, the example apparatus <NUM>/<NUM>' also includes means for transmitting a third power control command to the UE for determining a third transmission power for another first transmission following the re-transmission, and where the third power control command is determined without accumulation based on the power offset for the re-transmission. In some configurations, the example apparatus <NUM>/<NUM>' also includes means for transmitting a power offset in DCI to the UE. In some configurations, the example apparatus <NUM>/<NUM>' also includes means for transmitting a power offset in an RRC message to the UE. In some configurations the example apparatus <NUM>/<NUM>' also includes means for transmitting a first configured target transmit power to the UE for determining the first transmission power for the first transmission. Additionally, the example apparatus <NUM>/<NUM>' also includes means for transmitting a second configured target transmit power to the UE for determining the second transmission power for the re-transmission. In some configurations, the example apparatus <NUM>/<NUM>' also includes means for transmitting the first configured target transmit power and the second configured target transmit power to the UE in an RRC message. In some configurations, the example apparatus <NUM>/<NUM>' also includes means for transmitting at least one of a first reconfigured target transmit power and a second reconfigured target transmit power to the UE via an RRC message or Medium Access Control - Control Element (MAC-CE) signaling.

Claim 1:
A method of wireless communication at a User Equipment, UE, comprising:
determining (<NUM>) a first transmission power for a first transmission using a first transmission power control parameter, wherein the first transmission power control parameter comprises a first closed loop power control mode for the first transmission using transmission power accumulation based on a previous transmission power;
transmitting (<NUM>) the first transmission using the first transmission power;
receiving (<NUM>) a configured power offset for a re-transmission, the power offset including a power boost, in Downlink Control Information, DCI, from a base station;
determining (<NUM>) a second transmission power for the re-transmission using a second transmission power control parameter, wherein the second transmission power is determined based on the configured power offset including the power boost, and wherein the second transmission power control parameter comprises a second closed loop power control mode for the re-transmission without the transmission power accumulation;
transmitting (<NUM>) the re-transmission using the second transmission power; and
determining a third transmission power for another first transmission following the re-transmission, wherein the third transmission power comprises an accumulated transmission power and is determined without accumulation of a transmission power command for the re-transmission.