WO2017146773A1

WO2017146773A1 - Power control for links in beamforming systems

Info

Publication number: WO2017146773A1
Application number: PCT/US2016/051540
Authority: WO
Inventors: Shirish Nagaraj; Joonyoung Cho; Ajit Nimbalker; Bishwarup Mondal; Yushu Zhang; Wenting CHANG
Original assignee: Intel IP Corp
Current assignee: Intel IP Corp
Priority date: 2016-02-26
Filing date: 2016-09-13
Publication date: 2017-08-31
Anticipated expiration: 2018-08-26
Also published as: TWI726038B; CN108605298A; HK1258359A1; TW201739295A

Abstract

Embodiments herein describe devices, methods, computer-readable media, and systems for transmission power control for uplink (UL) channels. A user equipment (UE) may obtain a measurement of a beamformed reference signal (BRS) for a link of the set of active links, derive a pathloss value based on the measurement of the BRS, receive an uplink grant for an UL transmission by the link, and determine a transmission power for the UL transmission based on the pathloss value, and a plurality of power control parameters acquired by signaling from a layer higher than a physical layer. The eNB may periodically transmit a BRS for a link of the set of active links, schedule the link to transmit UL, determine a plurality of power control parameters, and further send a signal from a layer higher than a physical layer to the UE for signaling the plurality of power control parameters.

Description

POWER CONTROL FOR LINKS IN BEAMFORMING SYSTEMS

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims priority from U.S. Provisional Patent Application No. 62/300,686, filed February 26, 2016, and entitled "POWER CONTROL FOR 5G BEAMFORMED SYSTEMS", the entire disclosure of which is hereby incorporated by reference.

TECHNICAL FIELD

Embodiments generally may relate to the field of wireless communications.

BACKGROUND

To meet the ever-increasing demand for data, wireless communication systems, e.g., 5G systems, may employ radio access technologies (RAT) communicating at very high carrier frequencies such as the millimeter Wave (mmWave) spectrum. However, electromagnetic wave propagation may be poor in such high carrier frequencies. Highly directional antenna arrays may be used at evolved Nodes B (eNBs), transmission and reception points (TRPs), and user equipments (UEs) to overcome large pathlosses to the electromagnetic wave propagation in high carrier frequencies caused by attenuation from wall penetration, foliage, blocking, etc. Large bandwidth digital-to-analog converters (DACs) and analog-to-digital converters (ADCs) operating at high sampling rates may be used to support highly directional antenna arrays. However, such DACs and ADCs may be inefficient in power consumption.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 illustrates a high-level schematic example of wireless communication systems that include user equipments (UEs), evolved NodeBs (eNBs), transmission and reception points (TRPs), in accordance with various embodiments.

Figure 2 illustrates a high-level schematic example of a component used in a UE, an eNB, or a TRP, in accordance with various embodiments.

Figure 3 illustrates another high-level schematic example of a component used in a UE, an eNB, or a TRP, in accordance with various embodiments.

Figure 4 illustrates links between multiple UE beams of UEs, and multiple TRP beams of TRPs or eNBs, in a wireless communication system, in accordance with various embodiments.

Figure 5 illustrates a block diagram of an implementation for TRPs, eNBs, and/or UEs, in accordance with various embodiments. Figures 6-8 illustrate various processes for power control for links between UE beams of UEs and TRP beams of TRPs/e Bs in beamforming systems based on beamformed reference signals (BRS), in accordance with various embodiments.

Figure 9 illustrates an example computer-readable media in accordance with some embodiments.

Figure 10 illustrates a block diagram of an implementation for TRPs, e Bs, and/or UEs, in accordance with various embodiments.

Figure 11 illustrates hardware resources for TRPs, eNBs, and/or UEs, in accordance with, or suitable for use with, some embodiments.

DETAILED DESCRIPTION

The following detailed description refers to the accompanying drawings. The same reference numbers may be used in different drawings to identify the same or similar elements. In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular structures, architectures, interfaces, techniques, etc. in order to provide a thorough understanding of the various aspects of various embodiments. However, it will be apparent to those skilled in the art having the benefit of the present disclosure that the various aspects of the various embodiments may be practiced in other examples that depart from these specific details. In certain instances, descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the various embodiments with unnecessary detail.

For the purposes of the present disclosure, the phrases "A/B," "A or B," and "A and/or B" mean (A), (B), or (A and B). For the purposes of the present disclosure, the phrases "A, B, or C" and "A, B, and/or C" mean (A), (B), (C), (A and B), (A and C), (B and C), or (A, B and C).

The description may use the phrases "in an embodiment," or "in embodiments," which may each refer to one or more of the same or different embodiments. Furthermore, the terms "comprising," "including," "having," and the like, as used with respect to embodiments of the present disclosure, are synonymous.

As discussed herein, the term "module" may be used to refer to one or more physical or logical components or elements of a system. In some embodiments a module may be a distinct circuit, while in other embodiments a module may include a plurality of circuits.

Embodiments herein may be related to power control and resource allocation in wireless communication systems, e.g., 5th generation mobile networks, also called 5th generation wireless systems, or simply 5G systems. Specifically, embodiments herein may be related to transmission power control for uplink (UL) channels in wireless communication systems, such as a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference signal (SRS), transmitted in a subframe.

For example, a wireless communication system may include user equipments (UEs), evolved NodeBs (e Bs), and transmission and reception points (TRPs). An eNB may control one or more TRPs to transmit or receive signals. A TRP may be a remote radio head (RRH), controlled by an associated eNB, or another eNB. A UE may transmit multiple UE beams, while a TRP may transmit multiple TRP beams. A link may be formed between a TRP beam and a UE beam. A UE may be configured to have a set of links, which may be referred to as a set of active links of the UE. A beamformed reference signal (BRS) may be transmitted from a TRP for a link of the set of active links of the UE. The eNB may further schedule a link of the set of active links of the UE for UL transmission. The UE may transmit UL data or control signals on the link scheduled by the eNB, using a transmission power determined based on a measurement of the BRS, and further based on additional power control parameters received by signaling from a layer higher than a physical layer (hereinafter, also referred to as "higher-layer signaling"), where the physical layer is a sublayer of layer 1 of a cellular protocol stack. For example, in some embodiments, higher-layer signaling of power control parameters may refer to signaling the power control parameters by a radio resource control (RRC) layer, which is a sublayer of a layer 3 of the cellular protocol stack. However, in other embodiments, higher-layer signaling may refer to other signaling from other sublayers of layer 2 or 3 of the cellular protocol stack including, but not limited to, layer 2 sublayers (for example, media access control (MAC) layer, radio link control (RLC) layer, packet data convergence protocol (PDCP) layer), or layer 3 sublayers (for example, non-access stratum (NAS) layer).

In more details, the UE may obtain a measurement of a BRS for a link of the set of active links, and derive a pathloss value based on the measurement of the BRS. In addition, the UE may further receive, through a downlink (DL) control channel in a serving link of the set of active links, an uplink grant for an UL transmission from the UE to a TRP connected to the UE by the link. The UE may also determine a transmission power for the UL transmission based on the pathloss value, and a plurality of power control parameters acquired by signaling from a layer higher than a physical layer. In embodiments, the UL grant message may include a link identification, so that the UE may autonomously select a beamformed pathloss value to determine the transmission power for UL transmission. In embodiments, the UL grant message may include a link identification, so that the UE may select a beamformed pathloss value to determine the transmission power for UL transmission based on the link identification.

In some embodiments, the eNB may periodically transmit a BRS for a link of the set of active links. The eNB may also use a link of the set of active links of the UE for scheduling UL data or control signals, and transmit the BRS associated with the link, and an indication of the scheduled link to the UE. The eNB may further determine a plurality of power control parameters, and send a signal from a layer higher than a physical layer to the UE for signaling the plurality of power control parameters. In embodiments, the eNB may have flexibility in allocating different links to different UEs so that multiple UEs can share and be multiplexed on a single beam. For example, the eNB may schedule another link to another UE to transmit UL data or control, wherein another link shares the TRP beam of the link for a UE in a same subframe. In addition, mechanisms for per-link, closed-loop adaptation may also be included in various embodiments, as well as techniques for interference control and co-ordination.

Figure 1 schematically illustrates a wireless communication network 150 in accordance with various embodiments. Wireless communication network 150 (hereinafter "network 150") may be an access network of a 3rd Generation Partnership Project (3GPP) long-term evolution (LTE) network such as evolved universal mobile telecommunication system (UMTS) terrestrial radio access network (E-UTRAN). Alternatively and additionally, network 150 may be a 5G system at regular carrier frequency or very high carrier frequencies such as the millimeter Wave (mmWave) spectrum. The network 150 may include a base station, e.g., the eNB 151, configured to wirelessly communicate with a UE, e.g., the UE 152. Additionally, the network 150 may also include TRPs, such as the TRP 153.

The base stations and TRPs, e.g., the eNB 151 and the TRP 153, may form a coordinated multipoint (CoMP) system with various improved operational parameters in wireless networks. The eNB 151 may be a serving node and may facilitate wireless communication with the UE 152 through coordination with the TRP 153. In CoMP systems, the TRP 153 may be selected from a plurality of nodes (e.g., base stations) of a CoMP measurement set. The TRP 153 or other additional nodes may be collectively referred to as "coordinating nodes." An eNB may serve as coordinating and serving node roles at various times. The e B 151 may include a plurality of antennas 1511 to 1513. Similarly, the TRP 153 may include a plurality of antennas 1531 to 1533. One or more of the antennas 1511 to 1533 may be alternately used as transmit or receive antennas. Alternatively, or additionally, one or more of the antennas 1511 to 1533 may be dedicated receive antennas or dedicated transmit antennas. The serving node and coordinating nodes may communicate with one another over a wireless connection and/or a wired connection (e.g., a high-speed fiber backhaul connection).

The eNB 151 and the TRP 153 may each have generally the same transmission power capabilities as one another or, alternatively, the TRP 153 may have relatively lower transmission power capabilities. For example, in one embodiment, the eNB 151 may be a relatively high-power base station such as a macro eNB, while the TRP 153 may be relatively low-power base stations, e.g., pico eNBs and/or femto eNBs. A TRP may be a remote radio head (RRH), controlled by an associated eNB, or another eNB.

The UE 152 may include a plurality of antennas 1522 to 1524 for communicating wirelessly over network 150. The UE 152 may include any suitable number of antennas. In various embodiments, the UE 152 may include at least as many antennas as a number of simultaneous spatial layers or streams received by the UE 152 from the eNBs, although the scope of the present disclosure may not be limited in this respect. One or more of the antennas 1522 to 1524 may be alternately used as transmit or receive antennas. Alternatively, or additionally, one or more of the antennas 1522 to 1524 may be dedicated receive antennas or dedicated transmit antennas.

In order to satisfy the ever-increasing demand for data, RATs used in the network 150 may involve communication at very high carrier frequencies such as the millimeter Wave (mmWave) spectrum, where bandwidth is aplenty. However, electromagnetic wave propagations may be poor at such high frequencies. In embodiments, highly directional antenna arrays may be used at both the eNB and the UE, to overcome large path losses due to attenuation from wall penetration, foliage, blocking etc. Highly directional antenna arrays together with hybrid analog plus digital beamforming architectures may be used at the eNB 151, the TRP 153, and the UE 152 to overcome large path losses to the electromagnetic wave propagation in high carrier frequencies. For example, multiple antenna sub-arrays at both the eNB 151 and the UE 152, each providing sufficient beamforming gain may be used. The multiple antenna sub-arrays may give the eNB and the UE the ability to form one analog beam per polarization pair per antenna sub-array with possibility to switch beams across symbols or subframes. Figure 2 illustrates a transmitter 161 with a generic hybrid beamforming architecture that may include a plurality (e.g., A¾ of antennas 1611, 1613, to 1615, each corresponding to a particular look direction, and connected to a plurality (e.g. N_R) of RF beamformers 1616. The transmitter 161 with a generic hybrid beamforming architecture may be used in the eNB 151, the TRP 153, or the UE 152 shown in Figure 1, with applications in high carrier frequencies such as the mmWave spectrum. Together the antennas 1611, 1613, to 1615, and the RF beamformers 1616 may have the ability to form multiple analog beams. In embodiments, multiple beamformers may be used since beamformed transmission/reception may use an individual beamformer for a link between the TRP 153 and the UE 152. Through ADC/DAC 1618, digital signals from the baseband 1612 may be translated into analog signals, processed by the RF chains 1614 including amplifiers, and further processed by the RF beamformers 1616 for the UL transmission to support single-user/multi-user multiple-input and multiple-output (SU/MU-MTMO) and diversity transmission/reception. Alternatively, the transmitter 161 with a generic hybrid beamforming architecture may be used as a transmitter in an eNB, e.g., eNB 151, to transmit a beamformed reference signal (BRS), or other signals, to a UE.

Since the transmitter 161 with a generic hybrid beamforming architecture may operate at very high carrier frequencies such as the mmWave spectrum, large bandwidth ADC/DAC 1618 operating at high sampling rates may be used to support highly directional antenna arrays 1611 to 1615. However, the ADC/DAC 1618 may be inefficient in power consumption. Embodiments herein will present transmission power control mechanisms for the transmitter 161 with a generic hybrid beamforming architecture to improve the efficiency of the DAC and ADC.

Figure 3 illustrates, in more detail, a transmitter 163 with a hybrid beamforming architecture, with four sub-arrays 1631 of 4x4 cross-polarized (x-pol) elements at an eNB, e.g., the eNB 151 of Figure 1. The baseband signal may be received from a total of eight (4 x-pol) beamformed ports at any given time. In embodiments, the selected beamformer in the analog domain may be highly spatially selective, and applicable to one (or a few at most) UEs in the system. In embodiments, four beamformers 1636 may be coupled with the four sub-arrays 1631. Digital signals from the baseband 1632 may be converted into analog signals and processed by the 8 RF chains 1634 including power amplifiers and ADC/DAC (not shown), and further processed by the four beamformers 1636. Afterwards, the signals from the four beamformers 1636 are ready to be transmitted by the four sub-arrays 1631 for the UL transmission to support single-user/multi-user multiple- input and multiple-output (SU/MU-MEVIO) and diversity transmission/reception.

Figure 4 illustrates links between multiple UE beams of UEs, and multiple TRP beams of TRPs in a wireless network 170, in accordance with various embodiments. The TRPs, e.g., TRP A, TRP B, and TRP C, may belong to (or otherwise be associated with) the same or different e Bs. The TRPs, e.g., TRP A, TRP B, and TRP C, may be the TRP 153 in Figure 1, while the UEs, e.g., the UE 1, the UE 2, or the UE 3, may be the UE 152 in Figure 1.

In embodiments, a UE may include multiple UE beams, and a TRP may include multiple TRP beams. For example, the UE 1 may have a UE beam 1722 and a UE beam 1724, the UE 2 may have a UE beam 1742 and a UE beam 1744, while the UE 3 may have a UE beam 1762. Similarly, the TRP A may have a TRP beam 1711, and a TRP beam 1713, the TRP B may have a TRP beam 1731, and a TRP beam 1733, while the TRP C may have a TRP beam 1751. In addition, the UE beams and the TRP beams may be numbered. For example, the UE beam 1722 of the UE 1 may be #1 beam of the UE 1, while the TRP beam 1713 may be the #2 beam of the TRP A.

In embodiments, a link may be formed by a combination of a TRP beam and a UE beam. For example, the TRP beam 1713 and the UE beam 1742 may form a link 1714, the TRP beam 1713 and the UE beam 1762 may form a link 1716, while the TRP beam 1711 and the UE beam 1722 may form a link 1712. More links can be formed in similar fashions. In embodiment, a link may be identified by a link identification (ID), or more simply by a beam-id, or a link-id. Figure 4 shows a number of links including, for example, links 1712, 1714, 1716, and 1752. In embodiments, a link may also be described as {(TRP #, Beam #)-(UE #, Beam #)}. For example, the link 1714 may be described as {(TRP A, Beam 2)-(UE 2, Beam 2)}.

In embodiments, a UE may be configured with a set of active links, also referred to as an active link set. In more details, a UE, e.g., the UE 1 of the network 170, may have a set of possible links connecting a UE beam of the UE to a TRP beam of a TRP in the network 170. The UE may be configured on a subset of links of the set of possible links to transmit UL data and/or control signals. The configured subset of links for the UE may be referred to as a set of active links, a plurality of active links, or an active link set. When a UE is configured with an active link set that has more than one link, the UE may be capable of receiving (DL) and transmitting (UL) using multiple beams simultaneously, thus enabling either or both SU-MIMO, coordinated multi-point (MIMO/CoMP mode), or transmission over multiple component carriers. Additionally and alternatively, the notion of a set of active links may be applied in the non-CoMP mode. In embodiments in the non-CoMP mode, a set of active links may be one link the UE uses to transmit.

For example, as shown in Figure 4, a UE may have a set of active links. In more details, the UE 1 may have a set of active links: {(TRP A, Beam 1)-(UE 1, Beam 1); (TRP A, Beam 2)-(UE 1, Beam 2); and (TRP B, Beam 1)-(UE 1, Beam 2)}. Similarly, the UE 2 may have a set of active links: {(TRP A, Beam 2)-(UE 2, Beam 2); and (TRP C, Beam 1)- (UE 2, Beam 1)}, and the UE 3 may have a set of active links: {TRP B, Beam 2)-(UE 3, Beam 1)}. The set of active links may be a subset of links a UE may have. For example, UE 2 may have the set of active links {(TRP A, Beam 2)-(UE 2, Beam 2), (TRP C, Beam 1)-(UE 2, Beam 1)}, and may have further link {(TRP B, Beam 2)-(UE 2, Beam 2)}, which is not configured and included in the set of active links for the UE 2, as shown in dotted line. Similarly, links 1752 and 1716, shown in dotted lines, may not be configured and active.

In embodiments, a link of the set of active links of a UE may be referred to as a serving UL link when it is used to transmit UL data or control information from the UE to the TRP. Similarly, a serving DL link may be a link of a set of active links used to transmit DL data or control information from the TRP to the UE.

In embodiments, a new RAT for the wireless systems in the mmWave spectrum, may be referred to as xRAT, where the x refers to the new. Similarly, various channels used in various layers for data or control signal transmission for xRAT may also be referred to by an "x". For example, there may be a UL PHY data channel, referred to as a physical uplink shared channel (xPUSCH), a physical uplink control channel (xPUCCH), a DL control channel, referred to as a physical downlink control channel (xPDCCH), and a sounding reference signal as xSRS transmitted in a subframe. In embodiments, sometimes, the channels, such as PUSCH, PUCCH, PDCCH, and SRS may be used to refer xPUSCH, xPUCCH, xPDCCH, and xSRS, respectively.

The hybrid analog plus digital beamforming architecture for the xRAT, such as those architectures shown in Figures 2-3, may present a set of design constraints on L1/L2/L3 of a link between a UE and a TRP, in terms of resource allocation, multi-user scheduling/multiplexing, and transmission power control. For example, on the UL, traffic may be dominated by short packets, TCP ACKs, L1/L2 uplink control information (UCI), buffer status reports, power headroom reports, beam-specific reference signal received power (RSRP), or B-RSRP, etc. In embodiments, UEs may be buffer-limited. Further, UEs at the cell-edge may be power-limited, and it may not be feasible for a single or a few allocations to "fill-the-pipe." Embodiments herein may present mechanisms to support multiple simultaneous users scheduling on the UL to achieve improved system spectral efficiency as well as improved power efficiency to send a relatively large amount of L1/L2/L3 control information on the UL to satisfy DL data-intensive applications.

In embodiments, a TRP, e.g., the TRP A, the TRP B, or the TRP C, may determine periodically to transmit a BRS for a link of a set of active links of a UE. For example, the BRS may be transmitted every 5 ms (or every N ms, where N can be a positive integer). In embodiments, the BRS may be a mechanism for the UE to measure beam-specific RSRP to report to the e B. In embodiments, the BRS may be used to track the UE and provide improved beamforming gain.

In embodiment, a TRP, e.g., the TRP A, the TRP B, or the TRP C, may schedule a link of a set of active links to be the serving UL link for the UE to transmit uplink UL data or control signals. For example, a TRP scheduler may dynamically schedule a link from the set of active links of a UE. Such a dynamically scheduled link may allow the TRP or eNB scheduler to flexibly multiplex more users at the same time. For example, two UEs that have a same TRP receive beam in common amongst their set of active links can be simultaneously scheduled at the same time. In other words, the TRP may schedule a link for a UE to transmit UL, and then schedule another link to another UE for another UE to transmit UL, where another link shares the TRP beam of the link in a same subframe. The selection of the scheduled link of the set of active links of the UE may be carried by an uplink grant message, which may be transmitted through a DL control channel in a serving link.

In embodiments, the above flexible scheduling of multiple links for multiple UEs may also result in ambiguity about the pathloss value to be used by the UE in the power control procedure. To resolve this ambiguity, the scheduler may, at any given subframe, schedule both UEs simultaneously as long as the scheduler indicates to both UEs which corresponding link they may activate for their UL transmission. The UEs may then use the pathloss value corresponding to that particular link in the power control setting.

In embodiments, a TRP, e.g., the TRP A, the TRP B, or the TRP C, may determine a plurality of power control parameters, where a power control parameter may be associated with a link of the set of active links. In addition, a TRP may determine a signaling from a layer higher than a physical layer for signaling to the UE the plurality of power control parameters. The set of power control parameters may include O_PUSCH v.^/ Λ _^ which may be described in more details in the subsequent sections. A UE may be configured with multiple sets of power control parameters each associated with a link of the set of active links. Dynamic signaling using downlink control information (DCI) may be used to choose one particular power control parameter set. UE may use the selected power control parameter set for determining the transmission power for an uplink transmission. In embodiments, the UE may maintain a separate accumulation process for each set of power control parameters. The UE may also maintain pathloss value information corresponding to each link associated with a set of power control parameters.

In embodiments, furthermore, the TRP may receive a report of a measurement of the BRS by the UE for the link of the plurality of active links. The TRP may receive a signal from the UE, wherein the signal may be transmitted using a transmission power determined based on a pathloss value derived from a measurement of the BRS for the serving link. The signal may be received on a PUSCH, a PUCCH, or an SRS transmitted in a subframe.

In embodiments, a UE may monitor its UE beams from each TRP to receive a BRS for each link of the set of active links of the UE. The UE may obtain a measurement, such as RSRP or B-RSRP, of a BRS for each link of the set of active links of the UE. Afterwards, the UE may report measurements of BRS for individual links of the set of active links of the UE to an eNB or a TRP. For example, a UE may report a number of, e.g., top four, B-RSRP combinations to its serving eNB. The number of reported BRS may be configured via eNB signaling or the UE may determine the set of reported B- RSRP combinations based on a configured threshold value by higher layers.

The UE may further derive a pathloss value, PL, or simply referred to as pathloss, from the measurements of BRS for each link of the set of active links of the UE. The pathloss value may correspond to an estimate of a downlink beamformed pathloss. In embodiments, a pathloss value, PL, may be used by the UE in determining transmission power for uplink power control. In addition, the UE may compute a power headroom report (PHR) based on the pathloss value; and report the PHR to an eNB.

In embodiments, the pathloss value for a link, denoted as PL(i,j)-(k,l), may refer to the beamformed pathloss value derived from the BRS measurements corresponding to TRP z's beam j and UE &'s beam /. In embodiments, a UE may use a set of PLs, to indicate the overall information of a beamformed multi-cell system from the UE's point of view. For example, the set of PLs may be shown in Table 1 below:

In more details, each of the PL(i,j)-(k,l) in Table 1 may be calculated using the BRS corresponding to the BRS-ID signaled by a downlink control information message such as DCI format corresponding to an UL grant. For example, PL may be calculated as:

PL = referenceBeamSignalPower - higher layer filtered B-RSRP,

where referenceBeamSignalPower may be a value provided by higher layers, e.g., layers higher than the physical layer, B-RSRP may be the measurement obtained by the UE from the BRS signal for the link, which may be further filtered by parameters from higher layers to obtain the higher-layer filtered B-RSRP.

The UE may also receive, through a DL control channel in a serving link, an uplink grant for an UL transmission from the UE. The uplink grant may also include an associated power control identifier to be used to identify a power control parameters for the UL transmission.

The UE may further determine, based on the pathloss value, and the associated power control identifier, a transmission power for the UL transmission. In embodiments, the transmission power may be based on a plurality of power control parameters received from a TRP or an e B via a signaling from a layer higher than a physical layer. More details of the plurality of power control parameters may be presented in subsequent sections of the disclosure.

In cases of multiple component carriers or multiple beam transmission, the UE may scale the transmission power decided by the above process so that the overall transmission power for multiple beam transmissions does not exceed an allowed uplink transmission power, as determined by the UE or an eNB. In embodiments, the UE may determine a transmission power for a PUSCH, a transmission power for a PUCCH, and a transmission power for a SRS transmitted in a subframe; obtain a sum of the transmission power for the PUSCH, the transmission power for the PUCCH, and the transmission power for the SRS. When the sum of the transmission power for the PUSCH, the transmission power for the PUCCH, and the transmission power for the SRS exceeds an allowed uplink transmission power for the UE; the UE may scale the transmission power for the PUSCH, the transmission power for the PUCCH, and the transmission power for the SRS by one single scaling value, so that a sum of the scaled transmission power for the PUSCH, the scaled transmission power for the PUCCH, and the scaled transmission power for the SRS does not exceed the allowed uplink transmission power for the UE. Furthermore, the UE may transmit a signal based on the scaled transmission power for the PUSCH, the PUCCH, or the SRS.

The UE may further transmit a signal based on the determined transmission power on the link indicated by the UL grant message. The signal may be transmitted by the UE a few subframes, e.g. 1-3 subframes, later after receiving the UL grant via the DL control channel. The interval of a few subframes between the UL transmission from the UE may provide the UE sufficient time to switch its beam from the serving DL link to the beam for the scheduled UL link. In embodiments, the signal may be transmitted by the UE in the same subframe as the one in which the UL grant is received. In such cases, the UE may be able to switch its beam from the serving link to the beam for uplink transmission.

In the following, the set of power control parameters including {P °-^PUSCH (^j/) z) f_or a PUSCH, a PUCCH, or an SRS, may be described in more details. A UE may be configured with multiple sets of power control parameters each associated with a link of the set of active links. Dynamic signaling using DCI may be used to choose one particular power control parameter set.

UE Power control for xPUSCH may be determined as described below.

The UE transmission power P PUSCH (i) f_{or me} xPUSCH transmission in subframe i may be determined as follows:

^PUSCH (0 = ^min {^CMAX > ^{1 0 10}§10 ( PUSCH (0) + ^OJ-USCH U) + <*U) ^{' PL} + ^ΔΤΡ (0 + /(*^') } i where

the bandwidth of the xPUSCH resource assignment expressed in number of resource blocks valid for subframe z; P °-^PUSCH (^J /) may be a parameter composed of a sum of a cell p

specific nominal component °-^NOMINAL- ^PUSCH proved f_r0m higher layers, and a UE- p

specific component ^{0 UE PUSCH} provided by higher layers. For PUSCH (re)transmissions corresponding to a dynamic scheduled grant then j=l, and for PUSCH (re)transmissions corresponding to the random access response grant then j UE PUSCH (2)

^NOMINAL JOJSCH (2) = ^o_PRE + ^PREAMBLE _Ms_g3 ^ ^ _{PARAMETER (}^O PRE₎ P^REAMBLE _Msg3 _{are s}ig_naled f_r0m higher layers_.

_For j_{= 1 >} « ) e {0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, l} _Forj_=2; <*U) = ^L

chosen f_{rom a} UE specific set of 16 value pairs

P (1)

configured by higher layers. The chosen pair for °-^PUSCH and ^a my be signaled by DCI format corresponding to an UL grant .

TF IO U f_or s and 0 for ^s where ^s is given by the UE specific parameter delta MCS-Enabled provided by higher layers. More details are shown in the following: ^{MPR ~} °^{CQI INre} for control data sent via xPUSCH without

Uplink Shared Channel (UL-SCH) data and ^r=° for other cases, where C is the number of code blocks, K ' is the size for code block ' , o ^CQ! is the number of Channel

Quality Indicator (CQI) bits including Cyclic Redundancy Check (CRC) bits and is

_ PUSCH -initial PUSCH-initial

the number of resource elements determined as ^ ^{sc symb} , where ^c , PUSCH -initial „pvscH _ nCQI

^K' , ^sc and

. ^Poffs" ^{~ Poffs}" for control data sent via xPUSCH without

UL-SCH data and 1 for other cases. pusc^H ^ a UE specific correction value, also referred to as a Transmit Power Control (TPC) command and is included in xPDCCH with DCI format corresponding to an UL grantformat corresponding to an UL grant. The current xPUSCH power control adjustment state may be given by ^ which is defined by:

f(^ ^~ f(i ^) ⁺ ^PUSCH KPUSCH ) if accumulation is enabled based on the UE- specific parameter Accumulation-enabled provided by higher layers, where

^<WH ⁽* - ^{K PUSC}H ) _may be signaled on xPDCCH with DCI format corresponding to an UL grant on subframe ^z ^^PUSCH _{^ a}nd where is the first value after reset of accumulation. ^PUSCH is the number of subframes between the reception of the DCI format and the corresponding xPUSCH transmission. The ^PUSCH dB accumulated values may be signaled on xPDCCH with DCI format corresponding to an UL grant.

If UE has reached maximum power, positive TPC commands may not be accumulated. If UE has reached minimum power, negative TPC commands may not be accumulated

p

The UE may reset accumulation when ^{0 UE PUSCH} value is changed by higher layers, and when the UE receives random access response message.

The UE may maintain a separate f(i) accumulation process corresponding to different BRS-IDs that it receives as part of the xPDCCH DCI format corresponding to an UL grant.

The UE may keep a maximum N set different f (i) accumulation processes.

/ (0 = ^PUSCH - ^PUSCH) if accumulation is not enabled based on the UE-specific parameter Accumulation-enabled provided by higher layers

where: ^USCH 0^' - ^KPUSCH ) _was signaled on xPDCCH with DCI format

i— K

corresponding to an UL grant on subframe ^PUSCH ; and

puscH i_s he number of subframes between the reception of the DCI format corresponding to an UL grant and the corresponding xPUSCH transmission.

The ^PUSCH dB absolute values signaled on PDCCH with DCI format

corresponding to an UL grant may be given in Table 1.

Table 1 - Mapping of TPC Command Field in DCI format corresponding to an UL grant to absolute and accumulated °PUSCH values /( f(' 1) f_{or a} subframe where no xPDCCH with DCI format corresponding to an UL grant is decoded or where DRX occurs or i is not an uplink subframe in TDD. For both types of ^•^^(*-⁾ (accumulation or current absolute) the first value is set as follows: if ^°-^UE-^PUSCH value is changed by higher layers, then ^■/^"(') = ° ; else, f(0) = 0 for the first subframe after the initial random access.

UE Power control for Physical uplink control channel (xPUCCH)

The setting of the UE Transmit power PUCCH f_or he physical uplink control channel (xPUCCH) transmission in subframe i may be defined by:

( ^{— m}iⁿ X ' PL + h n n_BI , n , n_SR ) + Δ_Ρ __PUCCH (F~) + ,§^"(/)} p

where ^CMAX may be the configured UE transmitted power; the parameter

(F)

may be provided by higher layers. Each ^{F PUCCH '} ' value may correspond to a PUCCH format (F) relative to PUCCH format corresponding to a DL grant. ^h^ may be an xPUCCH format dependent value, where "^cei corresponds to the number information bits for the channel quality information and ^Hharq is the number of HARQ bits.

For PUCCH format corresponding to a DL grant, la and lb

. For PUCCH format 2,

¾/ ' ⁿBl^■> ⁿHARQ ^lSR )

otherwise

For PUCCH format 3 and when UE transmits HARQ- Acknowledgements/Scheduling Request (HARQ-ACK/SR) without Channel State

Information or Beam Information (CSI or BI), if the UE is configured by higher layers to transmit PUCCH format 3 on two antenna ports, or if the UE transmits more than 11 bits nHARQ ^{+ n}SR 1

b(ⁿCQI^■> ⁿBl^■> ⁿHARQ^■> ⁿSR )

of HARQ-ACK/SR ; Otherwise ⁿHARQ ^{+ n}SR ^~ 1

"\ⁿCQI ' ^ηΒΙ ' ⁿHARQ ' ¾ί ^— Z

. For PUCCH format 3 and when UE transmits

HARQ-ACK/SR along with CSI or BI, if the UE is configured by higher layers to transmit PUCCH format 3 on two antenna ports, or if the UE transmits more than 11 bits of

nHARQ ^{+ n}SR ^{+ n}CQI ⁺ ¾/ ^~ ^

"^■\ⁿCQI^■> ⁿBI^■> ⁿHARQ ' ⁿSR ) ^~

HARQ-ACK/SR and CSI ³ ;

, , ⁿHARQ + ⁿSR + ⁿCQI

"^■\ⁿCQI^■> ⁿBI^■> ⁿHARQ ' ⁿSR ) ^~ Z.

otherwise

^PUCCH j_{s a} p_arameter composed of the sum of a cell specific parameter

¾_NOMINAL_PUCCH _provided by higher layers and a UE specific component O_UE_PUCCH p

provided by higher layers. °-^PUCCH _and ^χ may be chosen from a UE specific set of 16 p

value pairs configured by higher layers. The chosen pair for °-^PUCCH and ^x is signaled by DCI format corresponding to a DL grant corresponding to DL grant or a DCI scheduling a-periodic UCI reporting.

puccH i_s a UE specific correction value, also referred to as a TPC command, included in a PDCCH with DCI format corresponding to a DL grant. If the UE decodes a PDCCH with DCI format corresponding to a DL grant and the corresponding detected Radio Network Temporary Identifier (RNTI) equals the C-RNTI of the UE, the UE may use the ^UCCH provided in that PDCCH.

M-1

S( = S(*^' - l) +∑½uccff (*^' - *J

m⁼⁰ where ⁸^^l> is the current PUCCH power control adjustment state. The PUCCH _val_Ues may be signaled on PDCCH with DCI format corresponding to a DL grant. The initial value of may be defined as ^⁰-^{UE PUCCH} value is changed by higher layers, The UE may maintain a separate g(i) accumulation process corresponding to different BRS-IDs that it receives as part of the xPDCCH DCI format corresponding to a DL grant. The UE may keep a maximum N set different g(i) accumulation processes.

If UE has reached maximum power, positive TPC commands may not be accumulated. If UE has reached minimum power, negative TPC commands may not be accumulated. UE may reset accumulation at cell-change when entering/leaving RRC Pn

active state when °-^UE-^PUCCH value is changed by higher layers, when the UE receives a random access response message ^~ ^ ^ if ^z is not an uplink subframe.

Table 2 Mapping of TPC Command Field in DCI format corresponding to a DL grant to ^PUCCH _vai_ues

UE Power control for Sounding Reference Symbol (x SRS)

The setting of the UE Transmit power ^s^Rs f_or the Sounding Reference Symbol transmitted on subframe i may be defined by

-^SRs C ^{= mm}i^ CMAX ' RS OFFSET + 101ο_§10 ( _8Κ8) + ·_ο PUSCH U) + (j) - PL + /(/)}

[dBm] where ^CMAX is the configured UE transmitted power.

1.25 P_* SRS_OFFSET is a 4-bit UE specific parameter semi-statically configured by higher layers with IdB step size in the range [-3, 12] dB. For ^s p

SRS_OFFSET j_{s a} _^j_t specific parameter semi-statically configured by higher lay ^ers with 1.5 dB step size in the range [-10.5,12] dB

^SRS is the bandwidth of the SRS transmission in subframe i expressed in number of resource blocks.

f is the current power control adjustment state for the xPUSCH ; corresponding to the set index signalled in the xSRS scheduling grant.

Pc O PUSCH and « ) are parameters, where corresponding to the set index signaled in the xSRS scheduling grant. UE Power headroom

The UE power headroom ^PH valid f_or subframe i is defined by

PH (i) = P_CMAX - {l01og₁₀ ( _PUSCHC ) 4- P_{0pu scH} + a ^■ PL + Δ_ΤΡ(ί) + (.)}

The power headroom may be rounded to the closest value in the range [40; -23] dB with steps of 1 dB and is delivered by the physical layer to higher layers.

Downlink power allocation

Downlink power control determines the energy per resource element (EPRE). The term resource element energy denotes the energy prior to CP insertion. The term resource element energy also denotes the average energy taken over all constellation points for the modulation scheme applied. Uplink power control determines the average power over an OFDM symbol in which the physical channel is transmitted.

If UE-specific RSs are present in the PRBs upon which the corresponding PDSCH is mapped, the ratio of PDSCH EPRE to UE-specific RS EPRE within each OFDM symbol containing UE-specific RSs may be a constant, and that constant may be maintained over all the OFDM symbols containing the UE-specific RSs in the

corresponding PRBs. In addition, the UE may assume that for 16QAM or 64QAM, this ratio is 0 dB. eNB Relative Narrowband TX Power restrictions

The determination of reported Relative Narrowband TX Power indication

'("PRB ) i_s defined as follows:

is made

E (n ^")

where ^{A pm J} is the maximum intended EPRE of UE-specific xPDSCH REs in OFDM symbols not containing RS in this physical resource block on antenna port p in the ft

considered future time interval; ^PRB is the physical resource block number

npRB = °> · · · > ^ΛΒ ^~ 1 · threshold ^Q^ _{on one 0}f the following values

RNTP_threshold e {-_∞ -1 1 -10 -9 -8 -7 -6 -5 -4 -3 -2 -l,0,+l,+2,+3} _{[dB] and} where

is the base station maximum output power.

Embodiments described herein may be implemented into a system using any suitably configured hardware and/or software. Figure 5 illustrates, for one embodiment, example components of an electronic device 100. In embodiments, the electronic device 100 may be, implement, be incorporated into, or otherwise be a part of a UE, a TRP, or a eNB described herein, such as the UE 152, the TRP 153, or the eNB 151 in Figure 1, or the UE 1, the TRP A in Figure 4. In some embodiments, the electronic device 100 may include application circuitry 102, baseband circuitry 104, Radio Frequency (RF) circuitry 106, front-end module (FEM) circuitry 108 and one or more antennas 110, coupled together at least as shown.

As used herein, the term "circuitry" may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group), and/or memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality. In some embodiments, the circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules. In some embodiments, circuitry may include logic, at least partially operable in hardware.

The application circuitry 102 may include one or more application processors. For example, the application circuitry 102 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processor(s) may include any combination of general-purpose processors and dedicated processors (e.g., graphics processors, application processors, etc.). The processors may be coupled with and/or may include mem ory /storage and may be configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems to run on the system.

The baseband circuitry 104 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The baseband circuitry 104 may include one or more baseband processors and/or control logic to process baseband signals received from a receive signal path of the RF circuitry 106 and to generate baseband signals for a transmit signal path of the RF circuitry 106. Baseband processing circuity 104 may interface with the application circuitry 102 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 106. For example, in some embodiments, the baseband circuitry 104 may include a second generation (2G) baseband processor 104a, third generation (3G) baseband processor 104b, fourth generation (4G) baseband processor 104c, and/or other baseband processor(s) 104d for other existing generations, generations in development or to be developed in the future (e.g., fifth generation (5G), 6G, etc.). The baseband circuitry 104 (e.g., one or more of baseband processors 104a-d) may handle various radio control functions that enable communication with one or more radio networks via the RF circuitry 106. The radio control functions may include, but are not limited to, signal modulation/demodulation, encoding/decoding, radio frequency shifting, etc. In some embodiments, modulation/demodulation circuitry of the baseband circuitry 104 may include Fast-Fourier Transform (FFT), precoding, and/or constellation mapping/demapping functionality. In some embodiments, encoding/decoding circuitry of the baseband circuitry 104 may include convolution, tail- biting convolution, turbo, Viterbi, and/or Low Density Parity Check (LDPC) encoder/decoder functionality. Embodiments of modulation/demodulation and encoder/decoder functionality are not limited to these examples and may include other suitable functionality in other embodiments.

In some embodiments, the baseband circuitry 104 may include elements of a protocol stack such as, for example, elements of an evolved universal terrestrial radio access network (EUTRAN) protocol including, for example, physical (PHY), media access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), and/or radio resource control (RRC) elements. A central processing unit (CPU) 104e of the baseband circuitry 104 may be configured to run elements of the protocol stack for signaling of the PHY, MAC, RLC, PDCP and/or RRC layers. In some embodiments, the baseband circuitry may include one or more audio digital signal processor(s) (DSP) 104f. The audio DSP(s) 104f may be include elements for compression/decompression and echo cancellation and may include other suitable processing elements in other embodiments.

The baseband circuitry 104 may further include memory/storage 104g. The memory/storage 104g may be used to load and store data and/or instructions for operations performed by the processors of the baseband circuitry 104. Memory /storage for one embodiment may include any combination of suitable volatile memory and/or nonvolatile memory. The memory/storage 104g may include any combination of various levels of memory/storage including, but not limited to, read-only memory (ROM) having embedded software instructions (e.g., firmware), random access memory (e.g., dynamic random access memory (DRAM)), cache, buffers, etc. The memory/storage 104g may be shared among the various processors or dedicated to particular processors.

Components of the baseband circuitry may be suitably combined in a single chip, a single chipset, or disposed on a same circuit board in some embodiments. In some embodiments, some or all of the constituent components of the baseband circuitry 104 and the application circuitry 102 may be implemented together such as, for example, on a system on a chip (SOC).

In some embodiments, the baseband circuitry 104 may provide for communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuitry 104 may support communication with an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMAN), a wireless local area network (WLAN), a wireless personal area network (WPAN). Embodiments in which the baseband circuitry 104 is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.

RF circuitry 106 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium. In various embodiments, the RF circuitry 106 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network. RF circuitry 106 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 108 and provide baseband signals to the baseband circuitry 104. RF circuitry 106 may also include a transmit signal path which may include circuitry to up- convert baseband signals provided by the baseband circuitry 104 and provide RF output signals to the FEM circuitry 108 for transmission.

In some embodiments, the RF circuitry 106 may include a receive signal path and a transmit signal path. The receive signal path of the RF circuitry 106 may include mixer circuitry 106a, amplifier circuitry 106b and filter circuitry 106c. The transmit signal path of the RF circuitry 106 may include filter circuitry 106c and mixer circuitry 106a. RF circuitry 106 may also include synthesizer circuitry 106d for synthesizing a frequency for use by the mixer circuitry 106a of the receive signal path and the transmit signal path. In some embodiments, the mixer circuitry 106a of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 108 based on the synthesized frequency provided by synthesizer circuitry 106d. The amplifier circuitry 106b may be configured to amplify the down-converted signals and the filter circuitry 106c may be a low-pass filter (LPF) or band-pass filter (BPF) configured to remove unwanted signals from the down-converted signals to generate output baseband signals. Output baseband signals may be provided to the baseband circuitry 104 for further processing. In some embodiments, the output baseband signals may be zero-frequency baseband signals, although this is not a requirement. In some embodiments, mixer circuitry 106a of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.

In some embodiments, the mixer circuitry 106a of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 106d to generate RF output signals for the FEM circuitry 108. The baseband signals may be provided by the baseband circuitry 104 and may be filtered by filter circuitry 106c. The filter circuitry 106c may include a low-pass filter (LPF), although the scope of the embodiments is not limited in this respect.

In some embodiments, the mixer circuitry 106a of the receive signal path and the mixer circuitry 106a of the transmit signal path may include two or more mixers and may be arranged for quadrature downconversion and/or upconversion respectively. In some embodiments, the mixer circuitry 106a of the receive signal path and the mixer circuitry 106a of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., Hartley image rejection). In some embodiments, the mixer circuitry 106a of the receive signal path and the mixer circuitry 106a may be arranged for direct down conversion and/or direct up conversion, respectively. In some embodiments, the mixer circuitry 106a of the receive signal path and the mixer circuitry 106a of the transmit signal path may be configured for super-heterodyne operation.

In some embodiments, the output baseband signals and the input baseband signals may be analog baseband signals, although the scope of the embodiments is not limited in this respect. In some alternate embodiments, the output baseband signals and the input baseband signals may be digital baseband signals. In these alternate embodiments, the RF circuitry 106 may include ADC and DAC circuitry and the baseband circuitry 104 may include a digital baseband interface to communicate with the RF circuitry 106. In some dual-mode embodiments, a separate radio IC circuitry may be provided for processing signals for each spectrum, although the scope of the embodiments is not limited in this respect.

In some embodiments, the synthesizer circuitry 106d may be a fractional -N synthesizer or a fractional N/N+l synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable. For example, synthesizer circuitry 106d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.

The synthesizer circuitry 106d may be configured to synthesize an output frequency for use by the mixer circuitry 106a of the RF circuitry 106 based on a frequency input and a divider control input. In some embodiments, the synthesizer circuitry 106d may be a fractional N/N+l synthesizer.

In some embodiments, frequency input may be provided by a voltage controlled oscillator (VCO), although that is not a requirement. Divider control input may be provided by either the baseband circuitry 104 or the applications processor 102 depending on the desired output frequency. In some embodiments, a divider control input (e.g., N) may be determined from a look-up table based on a channel indicated by the applications processor 102.

Synthesizer circuitry 106d of the RF circuitry 106 may include a divider, a delay - locked loop (DLL), a multiplexer and a phase accumulator. In some embodiments, the divider may be a dual modulus divider (DMD) and the phase accumulator may be a digital phase accumulator (DP A). In some embodiments, the DMD may be configured to divide the input signal by either N or N+l (e.g., based on a carry out) to provide a fractional division ratio. In some example embodiments, the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump and a D-type flip-flop. In these embodiments, the delay elements may be configured to break a VCO period up into Nd equal packets of phase, where Nd is the number of delay elements in the delay line. In this way, the DLL provides negative feedback to help ensure that the total delay through the delay line is one VCO cycle.

In some embodiments, synthesizer circuitry 106d may be configured to generate a carrier frequency as the output frequency, while in other embodiments, the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and divider circuitry to generate multiple signals at the carrier frequency with multiple different phases with respect to each other. In some embodiments, the output frequency may be a LO frequency (fLO). In some embodiments, the RF circuitry 106 may include an IQ/polar converter.

FEM circuitry 108 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 110, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 106 for further processing. FEM circuitry 108 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 106 for transmission by one or more of the one or more antennas 110.

In some embodiments, the FEM circuitry 108 may include a TX/RX switch to switch between transmit mode and receive mode operation. The FEM circuitry may include a receive signal path and a transmit signal path. The receive signal path of the FEM circuitry may include a low-noise amplifier (LNA) to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 106). The transmit signal path of the FEM circuitry 108 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 106), and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 110.

In some embodiments, the electronic device 100 may include additional elements such as, for example, memory/storage, display, camera, sensor, and/or input/output (I/O) interface.

In embodiments where the electronic device 100 is, implements, is incorporated into, or is otherwise part of a UE, such as the UE 152 of Figure 1, or the UE 1 in Figure 4, the RF circuitry 106 may be to receive one or more signals, such as a BRS signal. The baseband circuitry 104 may be to obtain a measurement of a BRS for a link of a set of active links, derive a pathloss value based on the measurement of the BRS, determine an uplink grant for an uplink (UL) transmission from the UE to a TRP, and determine, based on the pathloss value, a transmission power for the UL transmission. The RF circuitry 106 may be to further transmit a signal using the determined transmission power for the UL transmission.

In embodiments where the electronic device 100 is, implements, is incorporated into, or is otherwise part of a UE, such as the UE 152 of Figure 1, or the UE 1 in Figure 4, the RF circuitry 106 may be to receive one or more signals, e.g., a BRS signal. In addition, the RF circuitry 106 may be to transmit a signal using a transmission power determined by the baseband circuitry 104. The baseband circuitry 104 may be to acquire via signaling from a layer higher than a physical layer, a plurality of power control parameters, wherein a power control parameter may be associated with a link of a plurality of active links, determine an uplink grant for an UL transmission from the UE to a TRP, and an associated power control identifier, identify, based on the associated power control identifier, a power control parameter of the plurality of power control parameters, and determine a transmission power based on the identified power control parameters.

In embodiments where the electronic device 100 is, implements, is incorporated into, or is otherwise part of a UE, such as the UE 152 of Figure 1, or the UE 1 in Figure 4, the RF circuitry 106 may transmit a signal using a determined transmission power. The baseband circuitry 104 may acquire, via signaling from a layer higher than a physical layer, a plurality of power control parameters, wherein a power control parameter of the plurality of power control parameters is associated with a link of a plurality of active links, and wherein the link includes a TRP beam of a plurality of TRP beams of a TRP and a UE beam of a plurality of UE beams of the UE. In addition, the baseband circuitry 104 may determine, based on a DL control channel at the physical layer, an uplink grant for an UL transmission from the UE to the TRP, and an associated power control identifier; identify, based on the associated power control identifier, a power control parameter of the plurality of power control parameters; and determine a transmission power based on the identified power control parameter.

Furthermore, the baseband circuitry 104 may obtain a sum of a transmission power for a PUSCH, a transmission power for a PUCCH, and a transmission power for a SRS transmitted in a subframe; and scale the transmission power for the PUSCH, the transmission power for the PUCCH, and the transmission power for the SRS by one single scaling value, wherein a sum of the scaled transmission power for the PUSCH, the scaled transmission power for the PUCCH, and the scaled transmission power for the SRS does not exceed an allowed uplink transmission power for the UE.

Moreover, the baseband circuitry 104 may monitor periodically a BRS for the link of the plurality of active links; obtain a measurement of the BRS for the link; derive a pathloss value based on the measurement of the BRS; and determine the transmission power based on the pathloss value in addition to the identified power control parameter. The baseband circuitry 104 may further report measurements of BRSs for individual links of the plurality of active links to an e B; compute a PHR based on the pathloss value; and report the PHR to an eNB. In embodiments where the electronic device 100 is, implements, is incorporated into, or is otherwise part of a TRP or an eNB, such as the eNB 151 or the TRP 153 of Figure 1, or the TRP A in Figure 4, the baseband circuitry 104 may be to determine periodically to transmit a BRS for a link of a plurality of active links, determine a plurality of power control parameters, wherein a power control parameter of the plurality of power control parameters is associated with the link of the set of active links, and schedule the link for the UE to transmit UL.

In some embodiments, the electronic device 100 of Figure 5 may be configured to perform one or more processes, techniques, and/or methods as described herein, or portions thereof. One such process is depicted in Figure 6, which may be performed by a UE, such as the UE 152 of Figure 1, or the UE 1 in Figure 4. For example, the process may include: obtaining a measurement of a BRS for a link of a plurality of active links, wherein the link includes a TRP beam of a plurality of TRP beams of a TRP and a UE beam of a plurality of UE beams of the UE (181); deriving a pathloss value based on the measurement of the BRS (183); determining, based on a DL control channel in a serving link of the plurality of active links, an uplink grant for an UL transmission from the UE to the TRP (185); determining, based on the pathloss value, a transmission power for the UL transmission (187), and transmitting a signal based on the determined transmission power (189).

In some embodiments, the electronic device 100 of Figure 5 may be configured to perform one or more processes, techniques, and/or methods as described herein, or portions thereof. One such process is depicted in Figure 7, which may be performed by a UE, such as the UE 152 of Figure 1, or the UE 1 in Figure 4. For example, the process may include: acquiring via signaling from a layer higher than a physical layer, a plurality of power control parameters, wherein a power control parameter of the plurality of power control parameters is associated with a link of a plurality of active links, and wherein the link includes a TRP beam of a plurality of TRP beams of a TRP and a UE beam of a plurality of UE beams of the UE (191); determining, based on a DL control channel at the physical layer, an uplink grant for a UL transmission from the UE to the TRP, and an associated power control identifier (193); identifying, based on the associated power control identifier, a power control parameter of the plurality of power control parameters (195); determining a transmission power based on the identified power control parameter (197); and transmitting a signal using the determined transmission power (199). In some embodiments, the electronic device 100 of Figure 5 may be configured to perform one or more processes, techniques, and/or methods as described herein, or portions thereof. One such process is depicted in Figure 8, which may be performed by a TRP, such as the TRP 153 of Figure 1, or the TRP A in Figure 4. For example, the process may include: determining periodically to transmit a BRS for a link of a plurality of active links, wherein the link includes a TRP beam of a plurality of TRP beams of a TRP and a UE beam of a plurality of UE beams of the UE (192); determining a plurality of power control parameters, wherein a power control parameter of the plurality of power control parameters is associated with the link of the set of active links (194); and scheduling the link for the UE to transmit UL signals(196).

Figure 9 illustrates an example computer-readable media 124 that may be suitable for use to store instructions that cause an apparatus, in response to execution of the instructions by the apparatus, to practice selected aspects of the present disclosure. In some embodiments, the computer-readable media 124 may be non-transitory. As shown, computer-readable storage medium 124 may include programming instructions 128. Programming instructions 128 may be configured to enable a device, for example, electronic device 100 shown in Figure 5, a UE such as the UE 152, a TRP such as the TRP 153, an e B such as the e B 151, as shown in Figure 1, or a UE such as the UE 1, the UE 2, or the UE 3, or a TRP such as the TRP A, the TRP B, or the TRP C in Figure 4, or another device, in response to execution of the programming instructions 128, to implement (aspects of) any of the processes or elements described throughout this disclosure related to transmission power control for UL, such as the process 180 in Figure 6, the process 190 in Figure 7, or the process 198 in Figure 8. In some embodiments, programming instructions 128 may be disposed on computer-readable media 124 that is transitory in nature, such as signals.

Any combination of one or more computer-usable or computer-readable media may be utilized. The computer-usable or computer-readable media may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium. More specific examples (a non-exhaustive list) of the computer-readable media would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, RAM, ROM, an erasable programmable read-only memory (for example, EPROM, EEPROM, or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a transmission media such as those supporting the Internet or an intranet, or a magnetic storage device. Note that the computer-usable or computer-readable media could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory. In the context of this document, a computer-usable or computer-readable media may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer- usable media may include a propagated data signal with the computer-usable program code embodied therewith, either in baseband or as part of a carrier wave. The computer- usable program code may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, radio frequency, etc.

Computer program code for carrying out operations of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).

The present disclosure is described with reference to flowchart illustrations or block diagrams of processes, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations or block diagrams, and combinations of blocks in the flowchart illustrations or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart or block diagram block or blocks. These computer program instructions may also be stored in a computer-readable medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable medium produce an article of manufacture including instruction means that implement the function/act specified in the flowchart or block diagram block or blocks.

The computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions that execute on the computer or other programmable apparatus provide processes for implementing the functions/acts specified in the flowchart or block diagram block or blocks.

Figure 10 illustrates a device 130, e.g., a UE, a TRP, or an eNB, in accordance with some embodiments. For example, the device 130 may be the electronic device 100 shown in Figure 5, a UE such as the UE 152, a TRP such as the TRP 153, an eNB such as the eNB 151, as shown in Figure 1, or a UE such as the UE 1, the UE 2, or the UE 3, or a TRP such as the TRP A, the TRP B, or the TRP C in Figure 4, or another device, to transmit or receive a signal using the transmitter/receiver 133. Furthermore, the control circuitry 131 may operate according to processes described herein, such as the process 180 in Figure 6, the process 190 in Figure 7, or the process 198 in Figure 8.

In embodiments in which the electronic device 130 is used to implement the device

100 illustrated in Figure 5, the control circuitry 131 may be implemented in parts of the baseband circuitry 104 and the transmitter/receiver 133 may be implemented in parts of the RF circuitry 106 and/or FEM circuitry 108. In embodiments, the control circuitry may be a processing circuitry to determine periodically to transmit a BRS for a link of a plurality of active links, to determine a plurality of power control parameters, each associated with a link of the set of active links, and to schedule the link for the UE to transmit uplink (UL). In addition, the transmitter/receiver 133 may be used to transmit a BRS from an eNB.

Figure 11 is a block diagram illustrating components, according to some example embodiments, able to read instructions from a machine-readable or computer-readable medium (e.g., a machine-readable storage medium) and perform any one or more of the methodologies discussed herein. Specifically, Figure 11 shows a diagrammatic representation of hardware resources 1100 including processing circuitry including one or more processors (or processor cores) 1110, one or more memory/storage devices 1120, and one or more communication resources 1130, each of which are communicatively coupled via a bus 1140. In embodiments, the memory /storage devices 1120 may be the computer-readable media 124 in Figure 9, while the one or more processors 1110 may be a part of the control circuitry 131 of Figure 10.

The processors 1110 (e.g., a central processing unit (CPU), a reduced instruction set computing (RISC) processor, a complex instruction set computing (CISC) processor, a graphics processing unit (GPU), a digital signal processor (DSP) such as a baseband processor, an application specific integrated circuit (ASIC), a radio-frequency integrated circuit (RFIC), another processor, or any suitable combination thereof) may include, for example, a processor 1112 and a processor 1114. The memory/storage devices 1120 may include main memory, disk storage, or any suitable combination thereof. In embodiments, processors 1110 may be a D2D circuitry to determine a resource pool from the set of available resources for SL communication.

The communication resources 1130 may include interconnection and/or network interface components or other suitable devices to communicate with one or more peripheral devices 1104 and/or one or more databases 1106 via a network 1108. For example, the communication resources 1130 may include wired communication components (e.g., for coupling via a Universal Serial Bus (USB)), cellular communication components, Near Field Communication (NFC) components, Bluetooth® components (e.g., Bluetooth® Low Energy), Wi-Fi® components, and other communication components. In embodiments, communication resources 1130 may be an interface control circuitry to receive information about a set of available resources for SL communication.

Instructions 1150 may comprise software, a program, an application, an applet, an app, or other executable code for causing at least any of the processors 1110 to perform any one or more of the methodologies discussed herein. The instructions 1150 may reside, completely or partially, within at least one of the processors 1110 (e.g., within the processor's cache memory), the memory/storage devices 1120, or any suitable combination thereof. Furthermore, any portion of the instructions 1150 may be transferred to the hardware resources 1100 from any combination of the peripheral devices 1104 and/or the databases 1106. Accordingly, the memory of processors 1110, the memory/storage devices 1120, the peripheral devices 1104, and the databases 1106 are examples of computer-readable and machine-readable media. EXAMPLES

Example 1 may include one or more computer-readable media comprising instructions to cause a user equipment (UE), upon execution of the instructions by one or more processors of the UE, to:

obtain a measurement of a beamformed reference signal (BRS) for a link of a plurality of active links, wherein the link includes a transmission and reception point (TRP) beam of a plurality of TRP beams of a TRP and a UE beam of a plurality of UE beams of the UE;

derive a pathloss value based on the measurement of the BRS;

receive, through a downlink (DL) control channel in a serving link of the plurality of active links, an uplink grant for an uplink (UL) transmission from the UE to the TRP; determine, based on the pathloss value, a transmission power for the UL

transmission; and

transmit a signal based on the determined transmission power.

Example 2 may include the one or more computer-readable media of example 1 and/or some other examples herein, wherein the uplink grant includes an indication of a selection of a plurality of power control parameters for the UL transmission.

Example 3 may include the one or more computer-readable media of example 2 and/or some other examples herein, wherein the UE is configured with the plurality of power control parameters by signaling from a layer higher than a physical layer.

Example 4 may include the one or more computer-readable media of example 1 and/or some other examples herein, wherein the transmission power is determined for at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference symbol (SRS), transmitted in a subframe.

Example 5 may include the one or more computer-readable media of example 1 and/or some other examples herein, wherein to transmit the signal based on the determined transmission power includes to transmit the signal a plurality of subframes after receipt of the DL control channel.

Example 6 may include the one or more computer-readable media of example 1 and/or some other examples herein, wherein to transmit the signal based on the determined transmission power includes to transmit the signal in a same subframe as receipt of the DL control channel. Example 7 may include the one or more computer-readable media of example 3 and/or some other examples herein, wherein the layer higher than the physical layer includes a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and/or an non-access stratum (NAS) layer.

Example 8 may include the one or more computer-readable media of example 1 and/or some other examples herein, wherein the TRP is associated with a first evolved Node B (eNB) and the serving link communicatively connects the UE to a second TRP that is associated with a second eNB.

Example 9 may include the one or more computer-readable media of example 1 and/or some other examples herein, wherein the instructions, when executed, further cause the UE to:

report measurements of BRSs for individual links of the plurality of active links to an evolved node B (eNB).

Example 10 may include the one or more computer-readable media of example 1 and/or some other examples herein, wherein the instructions, when executed, further cause the UE to:

determine a transmission power for a physical uplink shared channel (PUSCH), a transmission power for a physical uplink control channel (PUCCH), and a transmission power for a sounding reference signal (SRS) to be transmitted in a subframe;

obtain a sum of the transmission power for the PUSCH, the transmission power for the PUCCH, and the transmission power for the SRS;

scale the transmission power for the PUSCH, the transmission power for the PUCCH, and the transmission power for the SRS by one single scaling value, wherein a sum of the scaled transmission power for the PUSCH, the scaled transmission power for the PUCCH, and the scaled transmission power for the SRS does not exceed an allowed uplink transmission power for the UE; and

transmit the signal based on the scaled transmission power for the PUSCH, the PUCCH, or the SRS.

Example 1 1 may include the one or more computer-readable media of example 1 and/or some other examples herein, wherein the instructions, when executed, further cause the UE to monitor the BRS for the link of the plurality of active links every 5 millisecond (ms). Example 12 may include an apparatus for a user equipment (UE) in a wireless communication network, comprising:

means for acquiring, via signaling from a layer higher than a physical layer, a plurality of power control parameters, wherein a power control parameter of the plurality of power control parameters is associated with a link of a plurality of active links, and wherein the link includes a transmission and reception point (TRP) beam of a plurality of TRP beams of a TRP and a UE beam of a plurality of UE beams of the UE;

means for determining, based on a downlink (DL) control channel at the physical layer, an uplink grant for an uplink (UL) transmission from the UE to the TRP, and an associated power control identifier;

means for identifying, based on the associated power control identifier, a power control parameter of the plurality of power control parameters;

means for determining a transmission power based on the identified power control parameter; and

means for transmitting a signal using the determined transmission power.

Example 13 may include the apparatus of example 12 and/or some other examples herein, wherein means for determining the transmission power comprises means for determining a transmission power for a physical uplink shared channel (PUSCH), a transmission power for a physical uplink control channel (PUCCH), or a transmission power for a sounding reference symbol (SRS), transmitted in a subframe.

Example 14 may include the apparatus of example 12 and/or some other examples herein, wherein means for transmitting the signal comprises means for transmitting the signal a plurality of subframes after receipt of the DL control channel.

Example 15 may include the apparatus of example 12 and/or some other examples herein, further comprising:

means for obtaining a sum of a transmission power for a physical uplink shared channel (PUSCH), a transmission power for a physical uplink control channel (PUCCH), and a transmission power for a sounding reference signal (SRS) transmitted in a subframe, wherein the means for determining a transmission power based on the identified power control parameter include means for determining the transmission power for the PUSCH, the transmission power for the PUCCH, and the transmission power for the SRS transmitted in a subframe;

means for scaling the transmission power for the PUSCH, the transmission power for the PUCCH, and the transmission power for the SRS by one single scaling value, wherein a sum of the scaled transmission power for the PUSCH, the scaled transmission power for the PUCCH, and the scaled transmission power for the SRS does not exceed an allowed uplink transmission power for the UE; and

wherein the means for transmitting the signal using the determined transmission power include means for transmitting the signal based on the scaled transmission power in the PUSCH, the PUCCH, or the SRS.

Example 16 may include the apparatus of any one of examples 12-15 and/or some other examples herein, further comprising:

means for monitoring periodically a beamforming reference signal (BRS) for the link of the plurality of active links;

means for obtaining a measurement of the BRS for the link;

means for deriving a pathloss value based on the measurement of the BRS; and means for determining the transmission power based on the pathloss value in addition to the identified power control parameter.

Example 17 may include the apparatus of any one of examples 12-15 and/or some other examples herein, wherein the layer higher than the physical layer includes a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and/or an non-access stratum (NAS) layer.

Example 18 may include the apparatus of example 16 and/or some other examples herein, further comprising:

means for computing a power headroom report (PHR) based on the pathloss value; and

means for report the PHR to an evolved node B (e B).

Example 19 may include an apparatus to be used in an evolved Node B (eNB) in a mobile communication network to communicate with a user equipment (UE), comprising: a memory storing instructions; and

one or more processors to execute the instructions stored in the memory to:

determine periodically to transmit a beamformed reference signal (BRS) for a link of a plurality of active links, wherein the link includes a transmission and reception point (TRP) beam of a plurality of TRP beams of a TRP and a UE beam of a plurality of UE beams of the UE;

determine a plurality of power control parameters, wherein a power control parameter of the plurality of power control parameters is associated with the link of the set of active links; and

schedule the link for the UE to transmit uplink (UL).

Example 20 may include the apparatus of example 19 and/or some other examples herein, wherein the one or more processors are further to:

determine a signaling from a layer higher than a physical layer for signaling to the UE the plurality of power control parameters.

Example 21 may include the apparatus of example 19 and/or some other examples herein, further comprising:

a transmitter to transmit the BRS for the link, the plurality of power control parameters, and the scheduled link to the UE.

Example 22 may include the apparatus of example 19 and/or some other examples herein, wherein the one or more processors are further to:

schedule another link to another UE for another UE to transmit uplink (UL), wherein the another link shares the TRP beam of the link in a same subframe.

Example 23 may include the apparatus of example 19 and/or some other examples herein, wherein the one or more processors are further to:

receive a report of a measurement of the BRS by the UE for the link of the plurality of active links.

Example 24 may include the apparatus of example 19 and/or some other examples herein, further comprising:

a receiver to receive a signal from the UE, wherein the signal is transmitted using a transmission power determined based on a pathloss value derived from a measurement of the BRS for the link.

Example 25 may include the apparatus of example 24 and/or some other examples herein, wherein the signal is received in a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference symbol (SRS) transmitted in a subframe.

Example 26 may include an apparatus to be used in a user equipment (UE) in a mobile communication network, comprising:

a memory storing instructions; and

one or more processors to execute the instructions stored in the memory to:

derive a pathloss value based on the measurement of the BRS;

determine, based on a downlink (DL) control channel in a serving link of the plurality of active links, an uplink grant for an uplink (UL) transmission from the UE;

determine, based on the pathloss value, a transmission power for the UL transmission; and

transmit a signal based on the determined transmission power. Example 27 may include the apparatus of example 26 and/or some other examples herein, wherein the uplink grant includes an indication of a selection of a plurality of power control parameters for the UL transmission.

Example 28 may include the apparatus of example 27 and/or some other examples herein, wherein the UE is configured with the plurality of power control parameters by signaling from a layer higher than a physical layer.

Example 29 may include the apparatus of example 26 and/or some other examples herein, wherein the transmission power is determined for at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference symbol (SRS), transmitted in a subframe.

Example 30 may include the apparatus of example 26 and/or some other examples herein, wherein the one or more processors are to execute the instructions stored in the memory to transmit the signal a plurality of subframes after receipt of the DL control channel.

Example 31 may include the apparatus of example 26 and/or some other examples herein, wherein the one or more processors are to execute the instructions stored in the memory to transmit the signal in a same subframe as receipt of the DL control channel.

Example 32 may include the apparatus of example 26 and/or some other examples herein, wherein the one or more processors are to execute the instructions stored in the memory further to derive the pathloss value based on the measurement of the BRS and a second parameter value provided by a layer higher than a physical layer.

Example 33 may include the apparatus of example 26 and/or some other examples herein, wherein the TRP is associated with a first evolved Node B (eNB) and the serving link communicatively connects the UE to a second TRP that is associated with a second eNB. Example 34 may include the apparatus of example 26 and/or some other examples herein, wherein the one or more processors are to execute the instructions stored in the memory further to:

report measurements of BRSs for individual links of the plurality of active links to an evolved node B (e B).

Example 35 may include the apparatus of example 26 and/or some other examples herein, wherein the one or more processors are to execute the instructions stored in the memory further to:

Example 36 may include the apparatus of example 26 and/or some other examples herein, wherein the one or more processors are to execute the instructions stored in the memory further to cause the UE to monitor the BRS for the link of the plurality of active links every 5 millisecond (ms).

Example 37 may include an apparatus for a user equipment (UE) in a wireless communication network, comprising:

a baseband circuitry to:

acquire, via signaling from a layer higher than a physical layer, a plurality of power control parameters, wherein a power control parameter of the plurality of power control parameters is associated with a link of a plurality of active links, and wherein the link includes a transmission and reception point (TRP) beam of a plurality of TRP beams of a TRP and a UE beam of a plurality of UE beams of the UE;

determine, based on a downlink (DL) control channel at the physical layer, an uplink grant for an uplink (UL) transmission from the UE to the TRP, and an associated power control identifier;

identify, based on the associated power control identifier, a power control parameter of the plurality of power control parameters; and

determine a transmission power based on the identified power control parameter; and

a radio frequency (RF) circuitry coupled to the baseband circuitry, the RF circuitry to transmit a signal using the determined transmission power.

Example 38 may include the apparatus of example 37 and/or some other examples herein, wherein the baseband circuitry is to determine a transmission power for a physical uplink shared channel (PUSCH), a transmission power for a physical uplink control channel (PUCCH), or a transmission power for a sounding reference symbol (SRS), transmitted in a subframe.

Example 39 may include the apparatus of example 37 and/or some other examples herein, wherein the RF circuitry is to transmit the signal a plurality of sub frames after receipt of the DL control channel.

Example 40 may include the apparatus of example 37 and/or some other examples herein, wherein the baseband circuitry is further to:

obtain a sum of a transmission power for a physical uplink shared channel (PUSCH), a transmission power for a physical uplink control channel (PUCCH), and a transmission power for a sounding reference signal (SRS) transmitted in a subframe, wherein the baseband circuitry is to determine the transmission power for the PUSCH, the transmission power for the PUCCH, and the transmission power for the SRS transmitted in a subframe;

wherein the RF circuitry is to transmit the signal based on the scaled transmission power in the PUSCH, the PUCCH, or the SRS.

Example 41 may include the apparatus of example 37 and/or some other examples herein, wherein the baseband circuitry is further to:

monitor periodically a beamforming reference signal (BRS) for the link of the plurality of active links; obtain a measurement of the BRS for the link;

derive a pathloss value based on the measurement of the BRS; and

determine the transmission power based on the pathloss value in addition to the identified power control parameter.

Example 42 may include the apparatus of example 37 and/or some other examples herein, wherein the baseband circuitry is further to: report measurements of BRSs for individual links of the plurality of active links to an evolved node B (e B).

Example 43 may include the apparatus of example 37 and/or some other examples herein, wherein the baseband circuitry is further to:

compute a power headroom report (PHR) based on the pathloss value; and report the PHR to an evolved node B (eNB).

The foregoing description of one or more implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of embodiments to the precise form disclosed. Modifications and variations are possible in light of the above teachings or may be acquired from practice of various embodiments.

Claims

Claims What is claimed is:

1. One or more computer-readable media comprising instructions to cause a user equipment (UE), upon execution of the instructions by one or more processors of the UE, to:

derive a pathloss value based on the measurement of the BRS;

determine, based on a downlink (DL) control channel in a serving link of the plurality of active links, an uplink grant for an uplink (UL) transmission from the UE; determine, based on the pathloss value, a transmission power for the UL transmission; and

transmit a signal based on the determined transmission power.

2. The one or more computer-readable media of claim 1, wherein the uplink grant includes an indication of a selection of a plurality of power control parameters for the UL transmission.

3. The one or more computer-readable media of claim 2, wherein the UE is configured with the plurality of power control parameters by signaling from a layer higher than a physical layer.

4. The one or more computer-readable media of claim 1, wherein the transmission power is determined for at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference symbol (SRS), transmitted in a subframe.

5. The one or more computer-readable media of claim 1, wherein to transmit the signal based on the determined transmission power includes to transmit the signal a plurality of subframes after receipt of the DL control channel.

6. The one or more computer-readable media of claim 1, wherein to transmit the signal based on the determined transmission power includes to transmit the signal in a same subframe as receipt of the DL control channel.

7. The one or more computer-readable media of claim 3, wherein the layer higher than the physical layer includes a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and/or an non-access stratum (NAS) layer.

8. The one or more computer-readable media of claim 1, wherein the TRP is associated with a first evolved Node B (eNB) and the serving link communicatively connects the UE to a second TRP that is associated with a second eNB.

9. The one or more computer-readable media of claim 1, wherein the instructions, when executed, further cause the UE to:

10. The one or more computer-readable media of any one of claims 1-9, wherein the instructions, when executed, further cause the UE to:

11. The one or more computer-readable media of any one of claims 1-9, wherein the instructions, when executed, further cause the UE to monitor the BRS for the link of the plurality of active links every 5 millisecond (ms).

12. An apparatus for a user equipment (UE) in a wireless communication network, comprising:

means for transmitting a signal using the determined transmission power.

13. The apparatus of claim 12, wherein means for determining the transmission power comprises means for determining a transmission power for a physical uplink shared channel (PUSCH), a transmission power for a physical uplink control channel (PUCCH), or a transmission power for a sounding reference symbol (SRS), transmitted in a subframe.

14. The apparatus of claim 12, wherein means for transmitting the signal comprises means for transmitting the signal a plurality of subframes after receipt of the DL control channel.

15. The apparatus of claim 12, further comprising:

16. The apparatus of any one of claims 12-15, further comprising:

means for obtaining a measurement of the BRS for the link; means for deriving a pathloss value based on the measurement of the BRS; and means for determining the transmission power based on the pathloss value in addition to the identified power control parameter.

17. The apparatus of any one of claims 12-15, wherein the layer higher than the physical layer includes a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and/or an non-access stratum (NAS) layer.

18. The apparatus of claim 16, further comprising:

means for report the PHR to an evolved node B (e B).

19. An apparatus to be used in an evolved Node B (eNB) in a mobile communication network to communicate with a user equipment (UE), comprising:

a memory storing instructions; and

one or more processors to execute the instructions stored in the memory to:

schedule the link for the UE to transmit uplink (UL).

20. The apparatus of claim 19, wherein the one or more processors are further to: determine a signaling from a layer higher than a physical layer for signaling to the UE the plurality of power control parameters.

21. The apparatus of claim 19, further comprising:

22. The apparatus of claim 19, wherein the one or more processors are further to: schedule another link to another UE for another UE to transmit uplink (UL), wherein the another link shares the TRP beam of the link in a same subframe.

23. The apparatus of claim 19, wherein the one or more processors are further to: receive a report of a measurement of the BRS by the UE for the link of the plurality of active links.

24. The apparatus of claim 19, further comprising:

25. The apparatus of any one of claims 19-24, wherein the signal is received in a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference symbol (SRS) transmitted in a subframe.