WO2018031825A1

WO2018031825A1 - System and method for enhanced csi feedback

Info

Publication number: WO2018031825A1
Application number: PCT/US2017/046378
Authority: WO
Inventors: Wenting CHANG; Gang Xiong; Seok Chul Kwon; Yushu Zhang; Yuan Zhu; Huaning Niu; Qinghua Li
Original assignee: Intel IP Corp
Current assignee: Intel IP Corp
Priority date: 2016-08-10
Filing date: 2017-08-10
Publication date: 2018-02-15
Anticipated expiration: 2019-02-10

Abstract

Described is an apparatus of a User Equipment (UE). The apparatus may comprise a first circuitry and a second circuitry. The first circuitry may be operable to process a first Channel State Information Reference Signal (CSI-RS) received through a current UE Receive (Rx) beam when the beam measurement indicator has a first value. The second circuitry may be operable to process a second CSI-RS received through a candidate UE Rx beam when the beam measurement indicator has a second value. Described is also an apparatus of a User Equipment (UE). The apparatus may comprise a first circuitry. The first circuitry may be operable to process a first transmission carrying one or more control signals for a Channel State Information Reference Signal (CSI-RS) joint precoding; process a second transmission carrying CSI-RS; and compensate a phase shift between a first portion of the CSI-RS and a second portion of the CSI-RS based on the one or more control signals for the CSI-RS joint precoding.

Description

SYSTEM AND METHOD FOR ENHANCED CSI FEEDBACK

CLAIM OF PRIORITY

[0001] The present application claims priority to Patent Cooperation Treaty

International Patent Application Number PCT/CN2016/094362 filed August 10, 2016 and entitled "Enhanced CSI Feedback," and claims priority under 35 U.S.C. § 119(e) to United States Provisional Patent Application Serial Number 62/438,224 filed December 22, 2016 and entitled "Joint Precoding Among Multiple Antenna Panels," which are herein

incorporated by reference in their entirety.

BACKGROUND

[0002] A variety of wireless cellular communication systems have been implemented, including a 3rd Generation Partnership Project (3 GPP) Universal Mobile

Telecommunications System, a 3GPP Long-Term Evolution (LTE) system, and a 3GPP LTE- Advanced (LTE-A) system. Next-generation wireless cellular communication systems based upon LTE and LTE-A systems are being developed, such as a fifth generation (5G) wireless system / 5G mobile networks system. Next-generation wireless cellular communication systems may provide support for higher bandwidths in part by supporting higher carrier frequencies, such as centimeter- wave and millimeter-wave frequencies. In turn, next- generation wireless cellular communication systems may provide support for higher carrier frequencies in part by supporting beamforming.

BRIEF DESCRIPTION OF THE DRAWINGS

[0003] The embodiments of the disclosure will be understood more fully from the detailed description given below and from the accompanying drawings of various embodiments of the disclosure. However, while the drawings are to aid in explanation and understanding, they are only an aid, and should not be taken to limit the disclosure to the specific embodiments depicted therein.

[0004] Fig. 1 illustrates a scenario of Network (NW) / User Equipment (UE) beam pair links, in accordance with some embodiments of the disclosure.

[0005] Fig. 2 illustrates a scenario of joint antenna panel cooperation, in accordance with some embodiments of the disclosure.

[0006] Fig. 3A illustrates an Evolved Node-B (eNB) antenna structure, in accordance with some embodiments of the disclosure. [0007] Fig. 3B illustrates a multi-panel antenna port layout, in accordance with some embodiments of the disclosure.

[0008] Fig. 4A illustrates a scenario for type 1 codebook based Channel State

Information (CSI) feedback, in accordance with some embodiments of the disclosure.

[0009] Fig. 4B illustrates a scenario for type 2 codebook based CSI feedback, in accordance with some embodiments of the disclosure.

[0010] Fig. 5 illustrates an Evolved Node B (eNB) and a UE, in accordance with some embodiments of the disclosure.

[0011] Fig. 6 illustrates hardware processing circuitries for a UE for CSI Reference

Signal (CSI-RS) measurement modes for candidate beam estimation and CSI configuration and report for joint panel cooperation, in accordance with some embodiments of the disclosure.

[0012] Fig. 7 illustrates hardware processing circuitries for a UE for CSI feedback frameworks, control signaling design, and codebook design, in accordance with some embodiments of the disclosure.

[0013] Figs. 8A-8B illustrates methods for a UE for CSI-RS measurement modes for candidate beam estimation and CSI configuration and report for joint panel cooperation, in accordance with some embodiments of the disclosure.

[0014] Fig. 9 illustrates methods for a UE for CSI feedback frameworks, control signaling design, and codebook design, in accordance with some embodiments of the disclosure.

[0015] Fig. 10 illustrates example components of a device, in accordance with some embodiments of the disclosure.

[0016] Fig. 11 illustrates example interfaces of baseband circuitry, in accordance with some embodiments of the disclosure.

DETAILED DESCRIPTION

[0017] Various wireless cellular communication systems have been implemented or are being proposed, including a 3rd Generation Partnership Project (3GPP) Universal Mobile Telecommunications System (UMTS), a 3GPP Long-Term Evolution (LTE) system, a 3GPP LTE-Advanced system, and a 5th Generation wireless system / 5th Generation mobile networks (5G) system / 5th Generation new radio (NR) system.

[0018] Some proposed cellular communication systems may incorporate radio frequencies including one or more frequency bands between 30 gigahertz and 300 gigahertz. Corresponding with radio wavelengths from 10 mm to 1 mm, such communication systems may sometimes be referred to as millimeter wave (mmWave).

[0019] Use of such high frequency bands is a compelling direction of various 5G systems. In high frequency bands, beam forming— including Transmit (Tx) side

beamforming and Receive (Rx) side beamforming— may be applied to provide beam forming gain, which may in turn compensate for pathloss in the high frequency bands and mitigate mutual user interference. How much gain may be obtained will impact system capacity and coverage.

[0020] In order to support more reliable wireless links, to improve robustness against blockage, and to realize fast beam searching in view of fast fading, one candidate Network (NW) / User Equipment (UE) beam pair link can be maintained, as well as an active NW-UE beam pair link. A NW-UE beam pair link may comprise a Tx beam on a NW side, such as an ENB side Tx beam, and an Rx beam on a UE side, such as a UE Rx beam.

[0021] Meanwhile, multiple panels may be equipped at the eNB side, to more efficiently cope with a tradeoff between the cost and performance. During periods of heavy traffic load, multiple panels may be utilized to support multi-user multiplexing, while multiple panels may also be utilized to serve single UEs by providing additional beam forming gain for a UE in the cell-edge area, and/or by improving a peak data rate on the UE side.

[0022] Discussed herein are various methods and mechanisms for supporting more flexible beam measurement. In some embodiments, mechanisms and methods for advanced Channel State Information Reference Signal (CSI-RS) measurement mode may be used to estimate candidate beams. For some embodiments, mechanisms and methods for CSI configuration and report may enhance joint panel cooperation.

[0023] Also discussed herein are various methods and mechanisms for designing

Channel State Information (CSI) measurement and feedback frameworks and control signaling design, as well as codebooks to enable a joint precoding among multiple antenna panels.

[0024] In the following description, numerous details are discussed to provide a more thorough explanation of embodiments of the present disclosure. It will be apparent to one skilled in the art, however, that embodiments of the present disclosure may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring embodiments of the present disclosure. [0025] Note that in the corresponding drawings of the embodiments, signals are represented with lines. Some lines may be thicker, to indicate a greater number of constituent signal paths, and/or have arrows at one or more ends, to indicate a direction of information flow. Such indications are not intended to be limiting. Rather, the lines are used in connection with one or more exemplary embodiments to facilitate easier understanding of a circuit or a logical unit. Any represented signal, as dictated by design needs or preferences, may actually comprise one or more signals that may travel in either direction and may be implemented with any suitable type of signal scheme.

[0026] Throughout the specification, and in the claims, the term "connected" means a direct electrical, mechanical, or magnetic connection between the things that are connected, without any intermediary devices. The term "coupled" means either a direct electrical, mechanical, or magnetic connection between the things that are connected or an indirect connection through one or more passive or active intermediary devices. The term "circuit" or "module" may refer to one or more passive and/or active components that are arranged to cooperate with one another to provide a desired function. The term "signal" may refer to at least one current signal, voltage signal, magnetic signal, or data/clock signal. The meaning of "a," "an," and "the" include plural references. The meaning of "in" includes "in" and "on."

[0027] The terms "substantially," "close," "approximately," "near," and "about" generally refer to being within +/- 10% of a target value. Unless otherwise specified the use of the ordinal adjectives "first," "second," and "third," etc., to describe a common object, merely indicate that different instances of like objects are being referred to, and are not intended to imply that the objects so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.

[0028] It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in other orientations than those illustrated or otherwise described herein.

[0029] The terms "left," "right," "front," "back," "top," "bottom," "over," "under," and the like in the description and in the claims, if any, are used for descriptive purposes and not necessarily for describing permanent relative positions.

[0030] For purposes of the embodiments, the transistors in various circuits, modules, and logic blocks are Tunneling FETs (TFETs). Some transistors of various embodiments may comprise metal oxide semiconductor (MOS) transistors, which include drain, source, gate, and bulk terminals. The transistors may also include Tri-Gate and FinFET transistors, Gate All Around Cylindrical Transistors, Square Wire, or Rectangular Ribbon Transistors or other devices implementing transistor functionality like carbon nanotubes or spintronic devices. MOSFET symmetrical source and drain terminals i.e., are identical terminals and are interchangeably used here. A TFET device, on the other hand, has asymmetric Source and Drain terminals. Those skilled in the art will appreciate that other transistors, for example, Bi-polar junction transistors-BJT PNP/NPN, BiCMOS, CMOS, etc., may be used for some transistors without departing from the scope of the disclosure.

[0031] For the purposes of the present disclosure, the phrases "A and/or B" and "A or

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

[0032] In addition, the various elements of combinatorial logic and sequential logic discussed in the present disclosure may pertain both to physical structures (such as AND gates, OR gates, or XOR gates), or to synthesized or otherwise optimized collections of devices implementing the logical structures that are Boolean equivalents of the logic under discussion.

[0033] In addition, for purposes of the present disclosure, the term "eNB" may refer to a legacy LTE capable Evolved Node-B (eNB), a next-generation or 5G capable eNB (e.g., a gNodeB), a millimeter-wave (mmWave) capable eNB or an mmWave small cell, an Access Point (AP), and/or another base station for a wireless communication system. For purposes of the present disclosure, the term "UE" may refer to a legacy LTE capable User Equipment (UE), a next-generation or 5G capable UE, an mmWave capable UE, a Station (STA), and/or another mobile equipment for a wireless communication system.

[0034] Various embodiments of eNBs and/or UEs discussed below may process one or more transmissions of various types. Some processing of a transmission may comprise demodulating, decoding, detecting, parsing, and/or otherwise handling a transmission that has been received. In some embodiments, an eNB or UE processing a transmission may determine or recognize the transmission's type and/or a condition associated with the transmission. For some embodiments, an eNB or UE processing a transmission may act in accordance with the transmission's type, and/or may act conditionally based upon the transmission's type. An eNB or UE processing a transmission may also recognize one or more values or fields of data carried by the transmission. Processing a transmission may comprise moving the transmission through one or more layers of a protocol stack (which may be implemented in, e.g., hardware and/or software-configured elements), such as by moving a transmission that has been received by an eNB or a UE through one or more layers of a protocol stack.

[0035] Various embodiments of eNBs and/or UEs discussed below may also generate one or more transmissions of various types. Some generating of a transmission may comprise modulating, encoding, formatting, assembling, and/or otherwise handling a transmission that is to be transmitted. In some embodiments, an eNB or UE generating a transmission may establish the transmission's type and/or a condition associated with the transmission. For some embodiments, an eNB or UE generating a transmission may act in accordance with the transmission's type, and/or may act conditionally based upon the transmission's type. An eNB or UE generating a transmission may also determine one or more values or fields of data carried by the transmission. Generating a transmission may comprise moving the transmission through one or more layers of a protocol stack (which may be implemented in, e.g., hardware and/or software-configured elements), such as by moving a transmission to be sent by an eNB or a UE through one or more layers of a protocol stack.

[0036] In various embodiments, resources may span various Resource Blocks (RBs),

Physical Resource Blocks (PRBs), and/or time periods (e.g., frames, subframes, and/or slots) of a wireless communication system. In some contexts, allocated resources (e.g., channels, Orthogonal Frequency -Division Multiplexing (OFMD) symbols, subcarrier frequencies, resource elements (REs), and/or portions thereof) may be formatted for (and prior to) transmission over a wireless communication link. In other contexts, allocated resources (e.g., channels, OFDM symbols, subcarrier frequencies, REs, and/or portions thereof) may be detected from (and subsequent to) reception over a wireless communication link.

[0037] Fig. 1 illustrates a scenario of NW / UE beam pair links, in accordance with some embodiments of the disclosure. In a scenario 100, an eNB 101 and a UE 102 may share a link. eNB 101 and UE 102 may transmit and/or receive over one or more beamformed beam pair links. For example, eNB 101 and UE 102 may be in wireless connection over a first beam pair link 111, which may be an active beam pair link, and may also maintain a second beam pair link, which may be a candidate beam pair link.

[0038] Beamforming may help compensate for pathloss, such as the severe pathloss that may exist for high frequency band wireless communication systems. In addition to configuring an active NW-UE beam pair link, a candidate NW-UE beam pair may also be configured, which can improve a system robustness against blockage and/or against time- varying fast fading. [0039] In some embodiments, a beam measurement indicator may be configured by an eNB. For some embodiments, one CSI-RS symbol may be configured, which may in turn support a 1-bit beam measurement indicator. For a first value of the 1-bit beam measurement indicator (e.g., a value of "0"), a UE may adopt a UE Rx beam which is paired with a current NW beam in Channel State Information (CSI) measurement and reporting for the associated active NW-UE beam pair link (e.g., the UE may undertake active beam pair link estimation). For a second value of the 1-bit measurement indicator (e.g., a value of "1"), a UE may adopt a UE Rx beam which is paired with a candidate NW beam in CSI measurement and reporting for the associated candidate NW-UE beam pair link (e.g., the UE may undertake candidate beam pair link estimation).

[0040] For some embodiments, two CSI-RS symbols may be configured, which may in turn support a 2-bit beam measurement indicator. For a first value of the 2-bit beam measurement indicator (e.g., for a value of "00"), a UE may adopt a UE Rx beam which is paired with a current NW beam in CSI measurement and reporting for the associated active NW-UE beam pair link (e.g., the UE may undertake active beam pair link estimation). For a second value of the 2-bit beam measurement indicator (e.g., for a value of "01"), a UE may adopt a UE Rx beam which is paired with a current NW beam in CSI measurement and reporting for the associated active NW-UE beam pair link (e.g., the UE may undertake active beam pair link estimation). For a third value of the 2-bit beam measurement indicator (e.g., for a value of "10"), a UE may adopt a UE Rx beam which is paired with a current NW beam to measure CSI based on a first CSI-RS symbol assigned to the active NW Tx beam, and may also adopt a UE Rx beam which is paired with a candidate NW beam to measure CSI based on a second CSI-S symbol assigned to the candidate NW Tx beam. (A fourth value of the 2- bit beam measurement indicator, e.g. a value of "11," may be reserved.)

[0041] In some embodiments, a beam measurement indicator may be associated with a number of CSI-RS symbols. For example, if two CSI-RS symbols are configured, a UE may utilize an active beam to measure a first CSI-RS symbol, and may utilize a candidate beam to measure a second CSI-RS symbol.

[0042] Fig. 2 illustrates a scenario of joint antenna panel cooperation, in accordance with some embodiments of the disclosure. In a scenario 200, an eNB 201 and a UE 202 may share a link. eNB 201 and UE 202 may transmit and/or receive over one or more beamformed beam pair links. eNB 201 may have one or more antenna panels 210, which may generate one or more respectively corresponding beamformed beams220. Any of the beams may be an analog beam. In some embodiments, any of antenna panels 210 may generate more than one beamformed beam. Various embodiments may support CSI-RS configuration and/or CSI-RS feedback, with and without joint panel cooperation.

[0043] For example, eNB 201 may deploy multiple panels, so that multiple analog beams may be generated at the same time. In some embodiments, the multiple beams may support multiple users. For some embodiments, under various conditions (such as when numerous UEs are activated in the network), eNB 201 may schedule different UEs in such a manner as to support proportional faimess. If a number of activated UEs decreases, eNB 201 may adopt multiple panels to a targeted UE (such as UE 202), which may advantageously improve a peak data rate for the UE.

[0044] For some embodiments, a 1-bit codebook indication may be configured by a

CSI-RS-related Downlink Control Information (DCI) format. A first value of the 1-bit codebook indication (e.g., a value of "0") may indicate a single-panel codebook search. For the single-panel codebook search, two ports may be paired, and a 2-port rank-l/rank-2 codebook may be considered for a search of a pertinent precoding matrix. A second value of the 1-bit codebook indication (e.g., a value of "1") may indicate an all-panel codebook search. For the all-panel codebook search, a codebook for an appropriate dimension of ports may be considered for search (e.g., for a search of a pertinent precoding matrix). For example, in cases of four panels having two ports per panel, a codebook for an 8-port dimension may be considered.

[0045] In some embodiments, a port number for a codebook search may be configured by a DCI format. For example, in cases in which a number of ports for codebook search is set to be four in a given DCI format, and eight ports within one CSI-RS symbol may be configured (e.g., ports 15, 16, 17, 18, 19, 20, 21, and/or 22), a codebook search based on four consecutive CSI-RS ports may performed. A UE may first perform a CSI-RS selection between two groups of ports (e.g., a first group comprising ports 15, 16, 17, and/or 18, and a second group comprising ports 19, 20, 21, 22). The UE may then perform a 4-port codebook search based on the selected group of ports.

[0046] For some embodiments, a number of ports for a codebook search may be configured by higher-layer signaling, or by DCI, or by a combination of the two.

[0047] In some embodiments, if a number of ports to be considered for a codebook search is not configured by a DCI format, the codebook search may be carried out based on a number of whole available candidate CSI-RS ports. A UE with a qualified link budget may require fewer panels to reach a maximum MCS (Modulation and Coding Scheme) than a UE with a poor link budget. [0048] For some embodiments, a number of panels for joint transmission may be reported by a UE. A Precoding Matrix Indicator (PMI), a Channel Quality Indicator (CQI), and/or a Rank Indicator (RI) may then be derived based on a number of whole CSI-RS ports, which may be inferred by the number of panels. For example, some cases may have four available panels corresponding to eight CSI-RS ports overall. In such cases, after measurement, if two panels for joint cooperation are preferred by the UE, a codebook associated with four ports may be searched, and a corresponding RI and/or a corresponding CQI may be derived.

[0049] In some embodiments, a 2-bit indicator may be designed for reporting the number of panels. For a first value of the 2-bit indicator (e.g., a value of "00") may correspond to two CSI-RS ports, a second value of the 2-bit indicator (e.g., a value of "01") may correspond to four CSI-RS ports, a third value of the 2-bit indicator (e.g., a value of "10") may correspond to eight CSI-RS ports, and a fourth value of the 2-bit indicator (e.g., a value of "11") may be reserved.

[0050] Fig. 3A illustrates an Evolved Node-B (eNB) antenna structure, in accordance with some embodiments of the disclosure. An antenna structure 300 may comprise a first antenna panel 301, a second antenna panel 302, a third antenna panel 303, and/or a fourth antenna panel 304. In various embodiments, phase shifts 311 may exist between antennas within various antenna panels (and/or between antennas within the various antenna panels).

[0051] Fig. 3B illustrates a multi-panel antenna port layout, in accordance with some embodiments of the disclosure. An antenna port layout structure 350 may comprise a first antenna port layout 351, a second antenna port layout 352, a third antenna port layout 353, and/or a fourth antenna port layout 354. In various embodiments, a first plurality of antenna ports 361, which may be antenna ports of a first polarization, may be indexed first, while a second plurality of antenna ports 362, which may be antenna ports of a second polarization, may be indexed next.

[0052] Massively Multiple-Input Multiple-Output (MIMO) techniques may be used in various 5G systems based on hybrid beamforming architectures, in which analog beamforming and/or digital precoding may be used. One way of transmitting multiple beams at the same time may be to use multiple antenna panels. An eNB may have an antenna array comprising M_g x N_g antenna panels, where M_g may be a number of antenna panels in one column, and where N_g may be a number of columns. For example, antenna structure 300 may have a total of 4 antenna panels (e.g., 2 antenna panels in one column across 2 columns). In some such embodiments, the eNB may be operable to transmit 4 beams simultaneously.

[0053] However, in various embodiments, not all antenna panels may be calibrated. As a result, there might be a phase shift between two antenna panels.

[0054] A UE may receive a signal from one antenna panel with one beam, or may receive signals from two antenna panels in dual-beam operation. Meanwhile, joint precoding among multiple antenna panels may be used, and the UE may accordingly receive signals from multiple antenna panels with the same analog beam with a joint digital precoder.

[0055] Based on a hybrid beamforming architecture, two antenna ports may be associated with one antenna panel. One antenna port may be used for a first polarization, while the other antenna port may be used for a second polarization. In some embodiments, without joint precoding, a UE can measure a maximum of M_g x N_g beams at one time. The UE may then report CSI based on two antenna ports for one beam, or for more than one beam. If a joint precoding from K antenna panels is enabled, the UE may measure a maximum of beams simultaneously. In each beam, the number of antenna ports may

be equal to 2 K. However, since antenna elements in different antenna panels may not be calibrated, there may be a phase shift between antenna panels.

[0056] Quantities for a codebook for joint precoding may be:

Where P and Q may be pre-defined by the system or configured by higher layer signaling; φ_η may be used to compensate a cophasing from different polarizations; and /?_m may be used to compensate a phase shift between different antenna panels.

[0057] Fig. 4A illustrates a scenario for type 1 codebook based Channel State

Information (CSI) feedback, in accordance with some embodiments of the disclosure. A scenario 400 may comprise an eNB 401, a UE 402, a first portion 410, and a second portion 420. In first portion 410, eNB 401 may transmit CSI-RS to UE 402, in which K may be indicated in DCI. UE 402 may then estimate CSI for multiple CSI-RS Resource Indices (CRIs), according to a type 1 codebook. In second portion 420, UE 402 may transmit CSI (e.g., may report CSI) to eNB 401, and may also provide as feedback a CRI, an RI, a PMI, and/or a CQI. [0058] In some embodiments, a codebook for i^-antenna-panel joint precoding may be used. (Such a codebook may be referred to herein as a type 1 codebook.) A rank 1 codebook may be generated in accordance with the equation below:

A rank 2 codebook may be generated in accordance with the equation below:

[0059] For some embodiments, to facilitate flexible antenna panel and CRI selection, a codebook may be generated with an assumption of 0 -antenna-panel joint precoding (in which 0 may be defined as 0 = M_g x N_g). (Such a codebook may be referred to herein as a type 2 codebook.) The quantities may be in accordance with the equation below:

Where a₍ may be a beam selection factor, and may have a value of "0" or "1." The rank 1 codebook may be generated in accordance with the equation below:

The rank 2 codebook may be generated in accordance with the equation below:

[0060] For scenarios involving a type 1 codebook, when scheduling a CSI-RS transmission, an eNB may be disposed to informing a UE of the value of K, and informing the UE about which antenna ports may use the same beam.

[0061] In some embodiments, an indicator which may be carried by DCI may indicate a number of aggregated antenna panels which may be used to trigger a CSI-RS transmission. For example, the indicator may be a 2-bit indicator, and a first value of the indicator may indicate K=\, a second value of the indicator may indicate K=2, a third value of the indicator may indicate K=4, and a forth value of the indicator may be reserved. A bit width for the indicator may be determined by a number of antenna panels in an eNB. In some

embodiments, a number of antenna panels in an eNB may be determined by a number of antenna ports corresponding with a Beam Reference Signal (BRS), or may be configured by higher-layer signaling.

[0062] A UE may then be disposed to provide as feedback a CRI, as well as part of, or all of, information including a RI, a PMI, and/or a CQI. A bit width for the CRI may be determined by a number of antenna ports for CSI-RS and a value of K. For example, the bit width may be calculated as may indicate a number of

total CSI-RS antenna ports.

[0063] Accordingly, Fig. 4A may depict a procedure for CSI feedback for a type 1 codebook. UE 402 may estimate a CSI for multiple CRIs based on the type 1 codebook, and may select a top number N of CSIs to provide as feedback (e.g., a top 2 CSIs where N=2), and may also select the CRI to provide as feedback.

[0064] Fig. 4B illustrates a scenario for type 2 codebook based CSI feedback, in accordance with some embodiments of the disclosure. A scenario 450 may comprise an eNB 451, a UE 452, a first portion 460, and a second portion 470. In first portion 460, eNB 451 may transmit CSI-RS to UE 452, in which the CSI-RS may be transmitted with a codebook subset restriction (which may be configured by DCI and/or by Radio Resource Control (RRC) signaling). UE 452 may then estimate CSI based on a type 2 codebook and the codebook subset restriction. In second portion 470, UE 452 may transmit CSI (e.g., may report CSI) to eNB 451, and may also provide as feedback an RI, a PMI, and/or a CQI.

[0065] In some embodiments, for a type 2 codebook, a PMI may be determined based on the variables in the codebook, and the UE may not be

disposed to providing CRI as feedback. Instead, the UE may merely report an RI, a PMI, and/or a CQI.

[0066] For some embodiments, a UE codebook search complexity and/or a codebook subset restriction may be configured by higher-layer signaling and/or by DCI (e.g., a DCI used to trigger a CSI-RS transmission). Based on the codebook subset restriction, the UE may search a subset from the codebook when reporting a PMI.

[0067] Accordingly, Fig. 4B may depict a procedure for CSI feedback for a type 2 codebook. UE 452 may not be disposed to providing as feedback CRI. Instead, UE 452 may estimate a CSI based on the type 2 codebook and a codebook subset restriction.

[0068] In various embodiments, the codebook may be extended to a rank greater- than-2 case. Then, in cases in which the rank is greater than a number x (e.g., for x=2), it may be used for beam selection only, while for other cases, it may be used for joint transmission from multiple antenna panels as well as beam selection.

[0069] In another embodiment, a joint antenna panel may be used when a phase noise between antenna panels is similar. In one option, an eNB may have a common hardware circuitry for phase locking and timer among a plurality of panels, up to and including all panels of the eNB. In another option, an eNB may have a hardware circuitry for phase locking and timer for each panel, and such hardware circuitry may be disposed to being calibrated in order to minimize a phase noise difference among panels. In general, to facilitate joint precoding among panels, the panels may be disposed to having a common phase noise, or to having a phase noise error between panels of no more than a predetermined number y (where y may be defined by specification).

[0070] Fig. 5 illustrates an eNB and a UE, in accordance with some embodiments of the disclosure. Fig. 5 includes block diagrams of an eNB 510 and a UE 530 which are operable to co-exist with each other and other elements of an LTE network. High-level, simplified architectures of eNB 510 and UE 530 are described so as not to obscure the embodiments. It should be noted that in some embodiments, eNB 510 may be a stationary non-mobile device.

[0071] eNB 510 is coupled to one or more antennas 505, and UE 530 is similarly coupled to one or more antennas 525. However, in some embodiments, eNB 510 may incorporate or comprise antennas 505, and UE 530 in various embodiments may incorporate or comprise antennas 525.

[0072] In some embodiments, antennas 505 and/or antennas 525 may comprise one or more directional or omni-directional antennas, including monopole antennas, dipole antennas, loop antennas, patch antennas, microstrip antennas, coplanar wave antennas, or other types of antennas suitable for transmission of RF signals. In some MIMO (multiple-input and multiple output) embodiments, antennas 505 are separated to take advantage of spatial diversity.

[0073] eNB 510 and UE 530 are operable to communicate with each other on a network, such as a wireless network. eNB 510 and UE 530 may be in communication with each other over a wireless communication channel 550, which has both a downlink path from eNB 510 to UE 530 and an uplink path from UE 530 to eNB 510.

[0074] As illustrated in Fig. 5, in some embodiments, eNB 510 may include a physical layer circuitry 512, a MAC (media access control) circuitry 514, a processor 516, a memory 518, and a hardware processing circuitry 520. A person skilled in the art will appreciate that other components not shown may be used in addition to the components shown to form a complete eNB.

[0075] In some embodiments, physical layer circuitry 512 includes a transceiver 513 for providing signals to and from UE 530. Transceiver 513 provides signals to and from UEs or other devices using one or more antennas 505. In some embodiments, MAC circuitry 514 controls access to the wireless medium. Memory 518 may be, or may include, a storage media/medium such as a magnetic storage media (e.g., magnetic tapes or magnetic disks), an optical storage media (e.g., optical discs), an electronic storage media (e.g., conventional hard disk drives, solid-state disk drives, or flash-memory-based storage media), or any tangible storage media or non-transitory storage media. Hardware processing circuitry 520 may comprise logic devices or circuitry to perform various operations. In some embodiments, processor 516 and memory 518 are arranged to perform the operations of hardware processing circuitry 520, such as operations described herein with reference to logic devices and circuitry within eNB 510 and/or hardware processing circuitry 520.

[0076] Accordingly, in some embodiments, eNB 510 may be a device comprising an application processor, a memory, one or more antenna ports, and an interface for allowing the application processor to communicate with another device.

[0077] As is also illustrated in Fig. 5, in some embodiments, UE 530 may include a physical layer circuitry 532, a MAC circuitry 534, a processor 536, a memory 538, a hardware processing circuitry 540, a wireless interface 542, and a display 544. A person skilled in the art would appreciate that other components not shown may be used in addition to the components shown to form a complete UE.

[0078] In some embodiments, physical layer circuitry 532 includes a transceiver 533 for providing signals to and from eNB 510 (as well as other eNBs). Transceiver 533 provides signals to and from eNBs or other devices using one or more antennas 525. In some embodiments, MAC circuitry 534 controls access to the wireless medium. Memory 538 may be, or may include, a storage media/medium such as a magnetic storage media (e.g., magnetic tapes or magnetic disks), an optical storage media (e.g., optical discs), an electronic storage media (e.g., conventional hard disk drives, solid-state disk drives, or flash-memory -based storage media), or any tangible storage media or non-transitory storage media. Wireless interface 542 may be arranged to allow the processor to communicate with another device. Display 544 may provide a visual and/or tactile display for a user to interact with UE 530, such as a touch-screen display. Hardware processing circuitry 540 may comprise logic devices or circuitry to perform various operations. In some embodiments, processor 536 and memory 538 may be arranged to perform the operations of hardware processing circuitry 540, such as operations described herein with reference to logic devices and circuitry within UE 530 and/or hardware processing circuitry 540. [0079] Accordingly, in some embodiments, UE 530 may be a device comprising an application processor, a memory, one or more antennas, a wireless interface for allowing the application processor to communicate with another device, and a touch-screen display.

[0080] Elements of Fig. 5, and elements of other figures having the same names or reference numbers, can operate or function in the manner described herein with respect to any such figures (although the operation and function of such elements is not limited to such descriptions). For example, Figs. 6-7 and 10-11 also depict embodiments of eNBs, hardware processing circuitry of eNBs, UEs, and/or hardware processing circuitry of UEs, and the embodiments described with respect to Fig. 5 and Figs. 6-7 and 10-11 can operate or function in the manner described herein with respect to any of the figures.

[0081] In addition, although eNB 510 and UE 530 are each described as having several separate functional elements, one or more of the functional elements may be combined and may be implemented by combinations of software-configured elements and/or other hardware elements. In some embodiments of this disclosure, the functional elements can refer to one or more processes operating on one or more processing elements. Examples of software and/or hardware configured elements include Digital Signal Processors (DSPs), one or more microprocessors, DSPs, Field-Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Radio-Frequency Integrated Circuits (RFICs), and so on.

[0082] Fig. 6 illustrates hardware processing circuitries for a UE for CSI-RS measurement modes for candidate beam estimation and CSI configuration and report for joint panel cooperation, in accordance with some embodiments of the disclosure. Fig. 7 illustrates hardware processing circuitries for a UE for CSI feedback frameworks, control signaling design, and codebook design, in accordance with some embodiments of the disclosure. With reference to Fig. 5, a UE may include various hardware processing circuitries discussed herein (such as hardware processing circuitry 600 of Fig. 6 and hardware processing circuitry 700 of Fig. 7), which may in turn comprise logic devices and/or circuitry operable to perform various operations. For example, in Fig. 5, UE 530 (or various elements or components therein, such as hardware processing circuitry 540, or combinations of elements or components therein) may include part of, or all of, these hardware processing circuitries.

[0083] In some embodiments, one or more devices or circuitries within these hardware processing circuitries may be implemented by combinations of software-configured elements and/or other hardware elements. For example, processor 536 (and/or one or more other processors which UE 530 may comprise), memory 538, and/or other elements or components of UE 530 (which may include hardware processing circuitry 540) may be arranged to perform the operations of these hardware processing circuitries, such as operations described herein with reference to devices and circuitry within these hardware processing circuitries. In some embodiments, processor 536 (and/or one or more other processors which UE 530 may comprise) may be a baseband processor.

[0084] Returning to Fig. 6, an apparatus of UE 530 (or another UE or mobile handset), which may be operable to communicate with one or more eNBs on a wireless network, may comprise hardware processing circuitry 600. In some embodiments, hardware processing circuitry 600 may comprise one or more antenna ports 605 operable to provide various transmissions over a wireless communication channel (such as wireless

communication channel 550). Antenna ports 605 may be coupled to one or more antennas 607 (which may be antennas 525). In some embodiments, hardware processing circuitry 600 may incorporate antennas 607, while in other embodiments, hardware processing circuitry 600 may merely be coupled to antennas 607.

[0085] Antenna ports 605 and antennas 607 may be operable to provide signals from a UE to a wireless communications channel and/or an eNB, and may be operable to provide signals from an eNB and/or a wireless communications channel to a UE. For example, antenna ports 605 and antennas 607 may be operable to provide transmissions from UE 530 to wireless communication channel 550 (and from there to eNB 510, or to another eNB). Similarly, antennas 607 and antenna ports 605 may be operable to provide transmissions from a wireless communication channel 550 (and beyond that, from eNB 510, or another eNB) to UE 530.

[0086] Hardware processing circuitry 600 may comprise various circuitries operable in accordance with the various embodiments discussed herein. With reference to Fig. 6, hardware processing circuitry 600 may comprise a first circuitry 610, a second circuitry 620, a third circuitry 630, and/or a fourth circuitry 640. First circuitry 610 may be operable to store a beam measurement indicator. First circuitry 610 may be, for example, a memory as disclosed herein. Second circuitry 620 may be operable to process a first CSI-RS received through a current UE Rx beam when the beam measurement indicator has a first value. First circuitry 610 may be operable to provide the beam measurement indicator to second circuitry 620 via an interface 612. Second circuitry 620 may also operable to process a second CSI- RS received through a candidate UE Rx beam when the beam measurement indicator has a second value. [0087] In some embodiments, the current UE Rx beam may be paired in a link with a current NW beam, and the candidate UE Rx beam may be paired in a link with a candidate NW beam.

[0088] For some embodiments, second circuitry 620 may also be operable to process a transmission configuring the beam measurement indicator.

[0089] In some embodiments, third circuitry 630 may be operable to measure the first

CSI-RS when the beam measurement indicator has the first value. Second circuitry may be operable to provide an indicator of the first CSI-RS to third circuitry 630 via an interface 622. For some embodiments, fourth circuitry 640 may be operable to generate a report for the first CSI-RS when the beam measurement indicator has the first value.

[0090] For some embodiments, third circuitry 640 may also be operable to measure the second CSI-RS when the beam measurement indicator has the second value. Second circuitry may be operable to provide an indicator of the second CSI-RS to third circuitry 630 via interface 622. In some embodiments, fourth circuitry 640 may also be operable to generate a report for the first CSI-RS when the beam measurement indicator has the second value.

[0091] In some embodiments, second circuitry 620 may also be operable to process both the first CSI-RS received through the current UE Rx beam and the second CSI-RS received through the candidate UE Rx beam when the beam measurement indicator has a third value. For some embodiments, third circuitry 640 may also be operable to measure both the first CSI-RS and the second CSI-RS when the beam measurement indicator has the third value. In some embodiments, fourth circuitry 640 may also be operable to generate a report for both the first CSI-RS and the second CSI-RS when the beam measurement indicator has the third value. For some embodiments, second circuitry 620 may additionally be operable to process a CSI-RS related DCI carrying a codebook search indicator.

[0092] In some embodiments, the codebook search indicator may have a value selected from a set of values including a first value corresponding with a single-panel codebook search and/or a second value corresponding with an all-panel codebook search. For some embodiments, the DCI may carry one or more antenna port numbers for a codebook search.

[0093] In some embodiments, second circuitry 620 may also be operable to process a higher-layer signaling transmission carrying one or more antenna port numbers for a codebook search. For some embodiments, first circuitry 610 may also be operable to store a number of panels for joint transmission. In some embodiments, fourth circuitry 640 may also be operable to generate a report for a CSI-RS for one or more parameters, wherein the one or more parameters are calculated based on the number of panels of joint transmission, the one or more parameters comprising: a PMI, a CQI, or an RI. First circuitry 610 may be operable to provide the number of panels for joint transmission to fourth circuitry 640 via an interface 614.

[0094] In some embodiments, first circuitry 610, second circuitry 620, third circuitry

630, and/or fourth circuitry 640 may be implemented as separate circuitries. In other embodiments, first circuitry 610, second circuitry 620, third circuitry 630, and/or fourth circuitry 640 may be combined and implemented together in a circuitry without altering the essence of the embodiments.

[0095] Returning to Fig. 7, an apparatus of UE 530 (or another UE or mobile handset), which may be operable to communicate with one or more eNBs on a wireless network, may comprise hardware processing circuitry 700. In some embodiments, hardware processing circuitry 700 may comprise one or more antenna ports 705 operable to provide various transmissions over a wireless communication channel (such as wireless

communication channel 550). Antenna ports 705 may be coupled to one or more antennas 707 (which may be antennas 525). In some embodiments, hardware processing circuitry 700 may incorporate antennas 707, while in other embodiments, hardware processing circuitry 700 may merely be coupled to antennas 707.

[0096] Antenna ports 705 and antennas 707 may be operable to provide signals from a UE to a wireless communications channel and/or an eNB, and may be operable to provide signals from an eNB and/or a wireless communications channel to a UE. For example, antenna ports 705 and antennas 707 may be operable to provide transmissions from UE 530 to wireless communication channel 550 (and from there to eNB 510, or to another eNB). Similarly, antennas 707 and antenna ports 705 may be operable to provide transmissions from a wireless communication channel 550 (and beyond that, from eNB 510, or another eNB) to UE 530.

[0097] Hardware processing circuitry 700 may comprise various circuitries operable in accordance with the various embodiments discussed herein. With reference to Fig. 7, hardware processing circuitry 700 may comprise a first circuitry 710, a second circuitry 720, and/or a third circuitry 730. First circuitry 710 may be operable to process a first transmission carrying one or more control signals for a CSI-RS joint precoding. First circuitry 710 may also be operable to process a second transmission carrying CSI-RS.

Second circuitry 720 may be operable to compensate a phase shift between a first portion of the CSI-RS and a second portion of the CSI-RS based on the one or more control signals for the CSI-RS joint precoding. First circuitry 710 may be operable to provide portions of the second transmission and the first transmission to second circuitry 720 via an interface 712.

[0098] In some embodiments, third circuitry 730 may be operable to measure the

CSI-RS carried by the second transmission based upon a joint precoding codebook. First circuitry 710 may be operable to provide information pertaining to the CSI-RS carried by the second transmission to third circuitry 730 via an interface 714.

[0099] For some embodiments, the joint precoding codebook may be generated, for a rank 1 precoder, as:

and the joint precoding codebook may be generated, for a rank 2 precoder, as:

Where:

and where K may be a number of antenna panels for the CSI-RS joint precoding.

[00100] In some embodiments, first circuitry 710 may be operable to process a third transmission carrying K in DCI and/or higher-layer signaling.

[00101] For some embodiments, the joint precoding codebook may be generated, for a rank 1 precoder, as:

and the joint precoding codebook may be generated, for a rank 2 precoder, as:

and where O may be a total number of antenna panels.

[00102] In some embodiments, one or more of first circuitry 710, second circuitry 720, and/or third circuitry 730 may be operable to search a subset from the joint precoding codebook based on a codebook subset restriction. [00103] In some embodiments, first circuitry 710, second circuitry 720, and/or third circuitry 730 may be implemented as separate circuitries. In other embodiments, first circuitry 710, second circuitry 720, and/or third circuitry 730 may be combined and implemented together in a circuitry without altering the essence of the embodiments.

[00104] Figs. 8A-8B illustrates methods for a UE for CSI-RS measurement modes for candidate beam estimation and CSI configuration and report for joint panel cooperation, in accordance with some embodiments of the disclosure. Fig. 9 illustrates methods for a UE for CSI feedback frameworks, control signaling design, and codebook design, in accordance with some embodiments of the disclosure. With reference to Fig. 5, methods that may relate to UE 530 and hardware processing circuitry 540 are discussed herein. Although the actions in the method 800 of Figs. 8A-8B and method 900 of Fig. 9 are shown in a particular order, the order of the actions can be modified. Thus, the illustrated embodiments can be performed in a different order, and some actions may be performed in parallel. Some of the actions and/or operations listed in Figs. 8A-9 are optional in accordance with certain embodiments. The numbering of the actions presented is for the sake of clarity and is not intended to prescribe an order of operations in which the various actions must occur. Additionally, operations from the various flows may be utilized in a variety of combinations.

[00105] Moreover, in some embodiments, machine readable storage media may have executable instructions that, when executed, cause UE 530 and/or hardware processing circuitry 540 to perform an operation comprising the methods of Figs. 8A-9. Such machine readable storage media may include any of a variety of storage media, like magnetic storage media (e.g., magnetic tapes or magnetic disks), optical storage media (e.g., optical discs), electronic storage media (e.g., conventional hard disk drives, solid-state disk drives, or flash- memory-based storage media), or any other tangible storage media or non-transitory storage media.

[00106] In some embodiments, an apparatus may comprise means for performing various actions and/or operations of the methods of Figs. 8A-9.

[00107] Returning to Figs. 8A-8B, various methods may be in accordance with the various embodiments discussed herein. A method 800 may comprise a storing 810, a processing 812, and a processing 814. In various embodiments, method 800 may also comprise a processing 820, a measuring 830, a generating 832, a measuring 840, a generating 842, a processing 840, a measuring 842, a generating 844, a processing 850, a processing 860, a storing 870, and/or a generating 872. [00108] In storing 810, a beam measurement indicator may be stored. In processing

812, a first CSI-RS received through a current UE Rx beam may be processed when the beam measurement indicator has a first value. In processing 814, a second CSI-RS received through a candidate UE Rx beam may be processed when the beam measurement indicator has a second value.

[00109] In some embodiments, the current UE Rx beam may be paired with a current

NW beam, and/or the candidate UE Rx beam may be paired with a candidate NW beam.

[00110] For some embodiments, in processing 820, a transmission configuring the beam measurement indicator may be processed.

[00111] In some embodiments, in measuring 830, the first CSI-RS may be measured when the beam measurement indicator has the first value, and in generating 832, a report may be generated for the first CSI-RS when the beam measurement indicator has the first value. For some embodiments, in measuring 840, the second CSI-RS may be measured when the beam measurement indicator has the second value, and for generating 842, a report may be generated for the first CSI-RS when the beam measurement indicator has the second value.

[00112] In some embodiments, in processing 850, both the first CSI-RS received through the current UE Rx beam and the second CSI-RS received through the candidate UE Rx beam may be processed when the beam measurement indicator has a third value. For some embodiments, in measuring 852, both the first CSI-RS and the second CSI-RS may be measured when the beam measurement indicator has the third value. In some embodiments, in generating 854, a report may be generated for both the first CSI-RS and the second CSI-RS when the beam measurement indicator has the third value. For some embodiments, in processing 860, a CSI-RS related DCI carrying a codebook search indicator may be processed.

[00113] In some embodiments, the codebook search indicator may have a value selected from a set of values including a first value corresponding with a single-panel codebook search and/or or a second value corresponding with an all-panel codebook search. For some embodiments, the DCI may carry one or more antenna port numbers for a codebook search.

[00114] In some embodiments, in processing 870, a higher-layer signaling

transmission carrying one or more antenna port numbers for a codebook search may be processed. For some embodiments, in processing 880, a number of panels for joint transmission may be stored. In some embodiments, in generating 882, a report for a CSI-RS for one or more parameters may be generated, wherein the one or more parameters are calculated based on the number of panels of joint transmission, the one or more parameters comprising PMI, CQI, and/or RI.

[00115] Returning to Fig. 9, various methods may be in accordance with the various embodiments discussed herein. A method 900 may comprise a processing 910, a processing 912, and a compensating 910. In various embodiments, method 900 may also comprise a measuring 930, a processing 940, and/or a searching 950.

[00116] In processing 910, a first transmission carrying one or more control signals for a CSI-RS joint precoding may be processed. IN processing 912, a second transmission carrying CSI-RS may be processed. In compensating 920, a phase shift between a first portion of the CSI-RS and a second portion of the CSI-RS may be compensated, based on the one or more control signals for the CSI-RS joint precoding.

[00117] In some embodiments, in measuring 930, the CSI-RS carried by the second transmission may be measured based upon ajoint precoding codebook.

[00118] For some embodiments, the joint precoding codebook may be generated, for a rank 1 precoder, as:

and the joint precoding codebook may be generated, for a rank 2 precoder, as:

Where:

and where K may be a number of antenna panels for the CSI-RS joint precoding.

[00119] In some embodiments, in processing 940, a third transmission carrying K in

DCI and/or higher-layer signaling may be processed.

[00120] For some embodiments, the joint precoding codebook may be generated, for a rank 1 precoder, as:

and the joint precoding codebook may be generated, for a rank 2 precoder, as

Where:

and where 0 may be a total number of antenna panels.

[00121] In some embodiments, in searching 950, a subset from the joint precoding codebook may be searched based on a codebook subset restriction.

[00122] Fig. 10 illustrates example components of a device, in accordance with some embodiments of the disclosure. In some embodiments, the device 1000 may include application circuitry 1002, baseband circuitry 1004, Radio Frequency (RF) circuitry 1006, front-end module (FEM) circuitry 1008, one or more antennas 1010, and power management circuitry (PMC) 1012 coupled together at least as shown. The components of the illustrated device 1000 may be included in a UE or a RAN node. In some embodiments, the device 1000 may include less elements (e.g., a RAN node may not utilize application circuitry 1002, and instead include a processor/controller to process IP data received from an EPC). In some embodiments, the device 1000 may include additional elements such as, for example, memory /storage, display, camera, sensor, or input/output (I/O) interface. In other embodiments, the components described below may be included in more than one device (e.g., said circuitries may be separately included in more than one device for Cloud-RAN (C- RAN) implementations).

[00123] The application circuitry 1002 may include one or more application processors. For example, the application circuitry 1002 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 or may include memory /storage and may be configured to execute instructions stored in the memory /storage to enable various applications or operating systems to run on the device 1000. In some embodiments, processors of application circuitry 1002 may process IP data packets received from an EPC.

[00124] The baseband circuitry 1004 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The baseband circuitry 1004 may include one or more baseband processors or control logic to process baseband signals received from a receive signal path of the RF circuitry 1006 and to generate baseband signals for a transmit signal path of the RF circuitry 1006. Baseband processing circuity 1004 may interface with the application circuitry 1002 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 1006. For example, in some embodiments, the baseband circuitry 1004 may include a third generation (3G) baseband processor 1004A, a fourth generation (4G) baseband processor 1004B, a fifth generation (5G) baseband processor 1004C, or other baseband processor(s) 1004D for other existing generations, generations in development or to be developed in the future (e.g., second generation (2G), sixth generation (6G), etc.). The baseband circuitry 1004 (e.g., one or more of baseband processors 1004A-D) may handle various radio control functions that enable communication with one or more radio networks via the RF circuitry 1006. In other embodiments, some or all of the functionality of baseband processors 1004A-D may be included in modules stored in the memory 1004G and executed via a Central Processing Unit (CPU) 1004E. 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 1004 may include Fast-Fourier Transform (FFT), precoding, or constellation mapping/demapping functionality. In some embodiments, encoding/decoding circuitry of the baseband circuitry 1004 may include convolution, tail-biting convolution, turbo, Viterbi, 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.

[00125] In some embodiments, the baseband circuitry 1004 may include one or more audio digital signal processor(s) (DSP) 1004F. The audio DSP(s) 1004F may be include elements for compression/decompression and echo cancellation and may include other suitable processing elements in other embodiments. 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 1004 and the application circuitry 1002 may be implemented together such as, for example, on a system on a chip (SOC).

[00126] In some embodiments, the baseband circuitry 1004 may provide for communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuitry 1004 may support communication with an evolved universal terrestrial radio access network (EUTRAN) 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 1004 is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.

[00127] RF circuitry 1006 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium. In various embodiments, the RF circuitry 1006 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network. RF circuitry 1006 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 1008 and provide baseband signals to the baseband circuitry 1004. RF circuitry 1006 may also include a transmit signal path which may include circuitry to up-convert baseband signals provided by the baseband circuitry 1004 and provide RF output signals to the FEM circuitry 1008 for transmission.

[00128] In some embodiments, the receive signal path of the RF circuitry 1006 may include mixer circuitry 1006 A, amplifier circuitry 1006B and filter circuitry 1006C. In some embodiments, the transmit signal path of the RF circuitry 1006 may include filter circuitry 1006C and mixer circuitry 1006A. RF circuitry 1006 may also include synthesizer circuitry 1006D for synthesizing a frequency for use by the mixer circuitry 1006A of the receive signal path and the transmit signal path. In some embodiments, the mixer circuitry 1006A of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 1008 based on the synthesized frequency provided by synthesizer circuitry 1006D. The amplifier circuitry 1006B may be configured to amplify the down-converted signals and the filter circuitry 1006C 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 1004 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 1006A of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.

[00129] In some embodiments, the mixer circuitry 1006A of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 1006D to generate RF output signals for the FEM circuitry 1008. The baseband signals may be provided by the baseband circuitry 1004 and may be filtered by filter circuitry 1006C.

[00130] In some embodiments, the mixer circuitry 1006A of the receive signal path and the mixer circuitry 1006A of the transmit signal path may include two or more mixers and may be arranged for quadrature downconversion and upconversion, respectively. In some embodiments, the mixer circuitry 1006A of the receive signal path and the mixer circuitry 1006A 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 1006 A of the receive signal path and the mixer circuitry 1006 A may be arranged for direct downconversion and direct upconversion, respectively. In some embodiments, the mixer circuitry 1006 A of the receive signal path and the mixer circuitry 1006A of the transmit signal path may be configured for super-heterodyne operation.

[00131] 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 1006 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 1004 may include a digital baseband interface to communicate with the RF circuitry 1006.

[00132] 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.

[00133] In some embodiments, the synthesizer circuitry 1006D 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 1006D may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.

[00134] The synthesizer circuitry 1006D may be configured to synthesize an output frequency for use by the mixer circuitry 1006A of the RF circuitry 1006 based on a frequency input and a divider control input. In some embodiments, the synthesizer circuitry 1006D may be a fractional N/N+l synthesizer.

[00135] 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 1004 or the applications processor 1002 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 1002. [00136] Synthesizer circuitry 1006D of the RF circuitry 1006 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.

[00137] In some embodiments, synthesizer circuitry 1006D 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 1006 may include an IQ/polar converter.

[00138] FEM circuitry 1008 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 1010, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 1006 for further processing. FEM circuitry 1008 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 1006 for transmission by one or more of the one or more antennas 1010. In various embodiments, the amplification through the transmit or receive signal paths may be done solely in the RF circuitry 1006, solely in the FEM 1008, or in both the RF circuitry 1006 and the FEM 1008.

[00139] In some embodiments, the FEM circuitry 1008 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 an LNA to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 1006). The transmit signal path of the FEM circuitry 1008 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 1006), and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 1010).

[00140] In some embodiments, the PMC 1012 may manage power provided to the baseband circuitry 1004. In particular, the PMC 1012 may control power-source selection, voltage scaling, battery charging, or DC-to-DC conversion. The PMC 1012 may often be included when the device 1000 is capable of being powered by a battery, for example, when the device is included in a UE. The PMC 1012 may increase the power conversion efficiency while providing desirable implementation size and heat dissipation characteristics.

[00141] While Fig. 10 shows the PMC 1012 coupled only with the baseband circuitry 1004. However, in other embodiments, the PMC 1012 may be additionally or alternatively coupled with, and perform similar power management operations for, other components such as, but not limited to, application circuitry 1002, RF circuitry 1006, or FEM 1008.

[00142] In some embodiments, the PMC 1012 may control, or otherwise be part of, various power saving mechanisms of the device 1000. For example, if the device 1000 is in an RRC_Connected state, where it is still connected to the RAN node as it expects to receive traffic shortly, then it may enter a state known as Discontinuous Reception Mode (DRX) after a period of inactivity. During this state, the device 1000 may power down for brief intervals of time and thus save power.

[00143] If there is no data traffic activity for an extended period of time, then the device 1000 may transition off to an RRC Idle state, where it disconnects from the network and does not perform operations such as channel quality feedback, handover, etc. The device 1000 goes into a very low power state and it performs paging where again it periodically wakes up to listen to the network and then powers down again. The device 1000 may not receive data in this state, in order to receive data, it must transition back to RRC Connected state.

[00144] An additional power saving mode may allow a device to be unavailable to the network for periods longer than a paging interval (ranging from seconds to a few hours). During this time, the device is totally unreachable to the network and may power down completely. Any data sent during this time incurs a large delay and it is assumed the delay is acceptable.

[00145] Processors of the application circuitry 1002 and processors of the baseband circuitry 1004 may be used to execute elements of one or more instances of a protocol stack. For example, processors of the baseband circuitry 1004, alone or in combination, may be used execute Layer 3, Layer 2, or Layer 1 functionality, while processors of the application circuitry 1004 may utilize data (e.g., packet data) received from these layers and further execute Layer 4 functionality (e.g., transmission communication protocol (TCP) and user datagram protocol (UDP) layers). As referred to herein, Layer 3 may comprise a radio resource control (RRC) layer, described in further detail below. As referred to herein, Layer 2 may comprise a medium access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (PDCP) layer, described in further detail below. As referred to herein, Layer 1 may comprise a physical (PHY) layer of a UE/RAN node, described in further detail below.

[00146] Fig. 11 illustrates example interfaces of baseband circuitry, in accordance with some embodiments of the disclosure. As discussed above, the baseband circuitry 1004 of Fig. 10 may comprise processors 1004A-1004E and a memory 1004G utilized by said processors. Each of the processors 1004A-1004E may include a memory interface, 1104A- 1104E, respectively, to send/receive data to/from the memory 1004G.

[00147] The baseband circuitry 1004 may further include one or more interfaces to communicatively couple to other circuitries/devices, such as a memory interface 1112 (e.g., an interface to send/receive data to/from memory external to the baseband circuitry 1004), an application circuitry interface 1114 (e.g., an interface to send/receive data to/from the application circuitry 1002 of Fig. 10), an RF circuitry interface 1116 (e.g., an interface to send/receive data to/from RF circuitry 1006 of Fig. 10), a wireless hardware connectivity interface 1118 (e.g., an interface to send/receive data to/from Near Field Communication (NFC) components, Bluetooth® components (e.g., Bluetooth® Low Energy), Wi-Fi® components, and other communication components), and a power management interface 1120 (e.g., an interface to send/receive power or control signals to/from the PMC 1012.

[00148] It is pointed out that elements of any of the Figures herein having the same reference numbers and/or names as elements of any other Figure herein may, in various embodiments, operate or function in a manner similar those elements of the other Figure (without being limited to operating or functioning in such a manner).

[00149] Reference in the specification to "an embodiment," "one embodiment," "some embodiments," or "other embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiments is included in at least some embodiments, but not necessarily all embodiments. The various appearances of "an embodiment," "one embodiment," or "some embodiments" are not necessarily all referring to the same embodiments. If the specification states a component, feature, structure, or characteristic "may," "might," or "could" be included, that particular component, feature, structure, or characteristic is not required to be included. If the specification or claim refers to "a" or "an" element, that does not mean there is only one of the elements. If the specification or claims refer to "an additional" element, that does not preclude there being more than one of the additional element.

[00150] Furthermore, the particular features, structures, functions, or characteristics may be combined in any suitable manner in one or more embodiments. For example, a first embodiment may be combined with a second embodiment anywhere the particular features, structures, functions, or characteristics associated with the two embodiments are not mutually exclusive.

[00151] While the disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of such embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures e.g., Dynamic RAM (DRAM) may use the

embodiments discussed. The embodiments of the disclosure are intended to embrace all such alternatives, modifications, and variations as to fall within the broad scope of the appended claims.

[00152] In addition, well known power/ground connections to integrated circuit (IC) chips and other components may or may not be shown within the presented figures, for simplicity of illustration and discussion, and so as not to obscure the disclosure. Further, arrangements may be shown in block diagram form in order to avoid obscuring the disclosure, and also in view of the fact that specifics with respect to implementation of such block diagram arrangements are highly dependent upon the platform within which the present disclosure is to be implemented (i.e., such specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the disclosure, it should be apparent to one skilled in the art that the disclosure can be practiced without, or with variation of, these specific details. The description is thus to be regarded as illustrative instead of limiting.

[00153] The following examples pertain to further embodiments. Specifics in the examples may be used anywhere in one or more embodiments. All optional features of the apparatus described herein may also be implemented with respect to a method or process.

[00154] Example 1 provides an apparatus of a User Equipment (UE) operable to communicate with an Evolved Node-B (eNB) on a wireless network, comprising: a memory to: store a beam measurement indicator, and one or more processors to: process a first Channel State Information Reference Signal (CSI-RS) received through a current UE Receive (Rx) beam when the beam measurement indicator has a first value; and process a second CSI- RS received through a candidate UE Rx beam when the beam measurement indicator has a second value.

[00155] In example 2, the apparatus of example 1, wherein the current UE Rx beam is paired in a link with a current Network (NW) beam; and wherein the candidate UE Rx beam is paired in a link with a candidate NW beam.

[00156] In example 3, the apparatus of either of examples 1 or 2, wherein the one or more processors are to: process a transmission configuring the beam measurement indicator.

[00157] In example 4, the apparatus of any of examples 1 through 3, wherein the one or more processors are to: measure the first CSI-RS when the beam measurement indicator has the first value; and generate a report for the first CSI-RS when the beam measurement indicator has the first value.

[00158] In example 5, the apparatus of any of examples 1 through 4, wherein the one or more processors are to: measure the second CSI-RS when the beam measurement indicator has the second value; and generate a report for the first CSI-RS when the beam measurement indicator has the second value.

[00159] In example 6, the apparatus of any of examples 1 through 5, wherein the one or more processors are to: process both the first CSI-RS received through the current UE Rx beam and the second CSI-RS received through the candidate UE Rx beam when the beam measurement indicator has a third value; measure both the first CSI-RS and the second CSI- RS when the beam measurement indicator has the third value; and generate a report for both the first CSI-RS and the second CSI-RS when the beam measurement indicator has the third value.

[00160] In example 7, the apparatus of any of examples 1 through 6, wherein the one or more processors are to: process a CSI-RS related Downlink Control Information (DCI) carrying a codebook search indicator.

[00161] In example 8, the apparatus of example 7, wherein the codebook search indicator has a value selected from a set of values including: a first value corresponding with a single-panel codebook search, or a second value corresponding with an all-panel codebook search.

[00162] In example 9, the apparatus of either of examples 7 or 8, wherein the DCI carries one or more antenna port numbers for a codebook search. [00163] In example 10, the apparatus of any of examples 7 through 9, wherein the one or more processors are to: process a higher-layer signaling transmission carrying one or more antenna port numbers for a codebook search.

[00164] In example 11, the apparatus of any of examples 1 through 10, wherein the memory is to: store a number of panels for joint transmission; and and the one or more processors are to: generate a report for a CSI-RS for one or more parameters, wherein the one or more parameters are calculated based on the number of panels of joint transmission, the one or more parameters comprising: a Precoding Matrix Indicator (PMI), a Channel Quality Indicator (CQI), or a Rank Indicator (RI).

[00165] Example 12 provides a User Equipment (UE) device comprising an application processor, a memory, one or more antennas, a wireless interface for allowing the application processor to communicate with another device, and a touch-screen display, the UE device including the apparatus of any of examples 1 through 11.

[00166] Example 13 provides a method comprising: storing, for a User Equipment

(UE), a beam measurement indicator, and processing a first Channel State Information Reference Signal (CSI-RS) received through a current UE Receive (Rx) beam when the beam measurement indicator has a first value; and processing a second CSI-RS received through a candidate UE Rx beam when the beam measurement indicator has a second value.

[00167] In example 14, the method of example 13, wherein the current UE Rx beam is paired with a current Network (NW) beam; and wherein the candidate UE Rx beam is paired with a candidate NW beam.

[00168] In example 15, the method of either of examples 13 or 14, comprising:

processing a transmission configuring the beam measurement indicator.

[00169] In example 16, the method of any of examples 13 through 15, comprising: measuring the first CSI-RS when the beam measurement indicator has the first value; and generating a report for the first CSI-RS when the beam measurement indicator has the first value.

[00170] In example 17, the method of any of examples 13 through 16, comprising: measuring the second CSI-RS when the beam measurement indicator has the second value; and generating a report for the first CSI-RS when the beam measurement indicator has the second value.

[00171] In example 18, the method of any of examples 13 through 17, comprising: processing both the first CSI-RS received through the current UE Rx beam and the second CSI-RS received through the candidate UE Rx beam when the beam measurement indicator has a third value; measuring both the first CSI-RS and the second CSI-RS when the beam measurement indicator has the third value; and generating a report for both the first CSI-RS and the second CSI-RS when the beam measurement indicator has the third value.

[00172] In example 19, the method of any of examples 13 through 18, comprising: processing a CSI-RS related Downlink Control Information (DCI) carrying a codebook search indicator.

[00173] In example 20, the method of example 19, wherein the codebook search indicator has a value selected from a set of values including: a first value corresponding with a single-panel codebook search, or a second value corresponding with an all-panel codebook search.

[00174] In example 21, the method of either of examples 19 or 20, wherein the DCI carries one or more antenna port numbers for a codebook search.

[00175] In example 22, the method of any of examples 19 through 21, comprising: processing a higher-layer signaling transmission carrying one or more antenna port numbers for a codebook search.

[00176] In example 23, the method of any of examples 13 through 22, comprising: storing a number of panels for joint transmission; and generating a report for a CSI-RS for one or more parameters, wherein the one or more parameters are calculated based on the number of panels of joint transmission, the one or more parameters comprising: a Precoding Matrix Indicator (PMI), a Channel Quality Indicator (CQI), or a Rank Indicator (RI).

[00177] Example 24 provides machine readable storage media having machine executable instructions stored thereon that, when executed, cause one or more processors to perform a method according to any of examples 13 through 23.

[00178] Example 25 provides an apparatus of a User Equipment (UE) operable to communicate with an Evolved Node B (eNB) on a wireless network, comprising: means for storing a beam measurement indicator, and means for processing a first Channel State Information Reference Signal (CSI-RS) received through a current UE Receive (Rx) beam when the beam measurement indicator has a first value; and means for processing a second CSI-RS received through a candidate UE Rx beam when the beam measurement indicator has a second value.

[00179] In example 26, the apparatus of example 25, wherein the current UE Rx beam is paired with a current Network (NW) beam; and wherein the candidate UE Rx beam is paired with a candidate NW beam. [00180] In example 27, the apparatus of either of examples 25 or 26, comprising: means for processing a transmission configuring the beam measurement indicator.

[00181] In example 28, the apparatus of any of examples 25 through 27, comprising: means for measuring the first CSI-RS when the beam measurement indicator has the first value; and means for generating a report for the first CSI-RS when the beam measurement indicator has the first value.

[00182] In example 29, the apparatus of any of examples 25 through 28, comprising: means for measuring the second CSI-RS when the beam measurement indicator has the second value; and means for generating a report for the first CSI-RS when the beam measurement indicator has the second value.

[00183] In example 30, the apparatus of any of examples 25 through 29, comprising: means for processing both the first CSI-RS received through the current UE Rx beam and the second CSI-RS received through the candidate UE Rx beam when the beam measurement indicator has a third value; means for measuring both the first CSI-RS and the second CSI-RS when the beam measurement indicator has the third value; and means for generating a report for both the first CSI-RS and the second CSI-RS when the beam measurement indicator has the third value.

[00184] In example 31, the apparatus of any of examples 25 through 30, comprising: means for processing a CSI-RS related Downlink Control Information (DCI) carrying a codebook search indicator.

[00185] In example 32, the apparatus of example 31, wherein the codebook search indicator has a value selected from a set of values including: a first value corresponding with a single-panel codebook search, or a second value corresponding with an all-panel codebook search.

[00186] In example 33, the apparatus of either of examples 31 or 32, wherein the DCI carries one or more antenna port numbers for a codebook search.

[00187] In example 34, the apparatus of any of examples 31 through 33, comprising: means for processing a higher-layer signaling transmission carrying one or more antenna port numbers for a codebook search.

[00188] In example 35, the apparatus of any of examples 25 through 34, comprising: means for storing a number of panels for joint transmission; and means for generating a report for a CSI-RS for one or more parameters, wherein the one or more parameters are calculated based on the number of panels of joint transmission, the one or more parameters comprising: a Precoding Matrix Indicator (PMI), a Channel Quality Indicator (CQI), or a Rank Indicator (RI).

[00189] Example 36 provides machine readable storage media having machine executable instructions that, when executed, cause one or more processors of a User

Equipment (UE) operable to communicate with an Evolved Node-B (eNB) on a wireless network to perform an operation comprising: store a beam measurement indicator, and process a first Channel State Information Reference Signal (CSI-RS) received through a current UE Receive (Rx) beam when the beam measurement indicator has a first value; and process a second CSI-RS received through a candidate UE Rx beam when the beam measurement indicator has a second value.

[00190] In example 37, the machine readable storage media of example 36, wherein the current UE Rx beam is paired with a current Network (NW) beam; and wherein the candidate UE Rx beam is paired with a candidate NW beam.

[00191] In example 38, the machine readable storage media of either of examples 36 or

37, the operation comprising: process a transmission configuring the beam measurement indicator.

[00192] In example 39, the machine readable storage media of any of examples 36 through 38, the operation comprising: measure the first CSI-RS when the beam measurement indicator has the first value; and generate a report for the first CSI-RS when the beam measurement indicator has the first value.

[00193] In example 40, the machine readable storage media of any of examples 36 through 39, the operation comprising: measure the second CSI-RS when the beam

measurement indicator has the second value; and generate a report for the first CSI-RS when the beam measurement indicator has the second value.

[00194] In example 41, the machine readable storage media of any of examples 36 through 40, the operation comprising: process both the first CSI-RS received through the current UE Rx beam and the second CSI-RS received through the candidate UE Rx beam when the beam measurement indicator has a third value; measure both the first CSI-RS and the second CSI-RS when the beam measurement indicator has the third value; and generate a report for both the first CSI-RS and the second CSI-RS when the beam measurement indicator has the third value.

[00195] In example 42, the machine readable storage media of any of examples 36 through 41, the operation comprising: process a CSI-RS related Downlink Control

Information (DCI) carrying a codebook search indicator. [00196] In example 43, the machine readable storage media of example 42, wherein the codebook search indicator has a value selected from a set of values including: a first value corresponding with a single-panel codebook search, or a second value corresponding with an all-panel codebook search.

[00197] In example 44, the machine readable storage media of either of examples 42 or

43, wherein the DCI carries one or more antenna port numbers for a codebook search.

[00198] In example 45, the machine readable storage media of any of examples 42 through 44, the operation comprising: process a higher-layer signaling transmission carrying one or more antenna port numbers for a codebook search.

[00199] In example 46, the machine readable storage media of any of examples 36 through 45, the operation comprising: store a number of panels for joint transmission; and generate a report for a CSI-RS for one or more parameters, wherein the one or more parameters are calculated based on the number of panels of joint transmission, the one or more parameters comprising: a Precoding Matrix Indicator (PMI), a Channel Quality Indicator (CQI), or a Rank Indicator (RI).

[00200] Example 47 provides an apparatus of a User Equipment (UE) operable to communicate with an Evolved Node-B (eNB) on a wireless network, comprising: one or more processors to: process a first transmission carrying one or more control signals for a Channel State Information Reference Signal (CSI-RS) joint precoding; process a second transmission carrying CSI-RS; and compensate a phase shift between a first portion of the CSI-RS and a second portion of the CSI-RS based on the one or more control signals for the CSI-RS joint precoding.

[00201] In example 48, the apparatus of example 47, wherein the one or more processors are to: measure the CSI-RS carried by the second transmission based upon ajoint precoding codebook.

[00202] In example 49, the apparatus of example 48, wherein the joint precoding codebook is g generated, for a rank 1 p rrecoder,, as: and

wherein the joint precoding codebook is generated, for a rank 2 precoder, as:

and wherein K is a number of antenna panels for the CSI-

RS joint precoding. [00203] In example 50, the apparatus of example 49, wherein the one or more processors are to: process a third transmission carrying K in one of: Downlink Control Information (DCI), or higher-layer signaling.

[00204] In example 51, the apparatus of any of examples 48 through 50, wherein the joint precoding codebook is generated, for a rank 1 precoder, as:

and wherein the joint precoding codebook is generated, for a

precoder, as:

and wherein O is a total number of

antenna panels.

[00205] In example 52, the apparatus of example 51, wherein the one or more processors are to: search a subset from the joint precoding codebook based on a codebook subset restriction.

[00206] Example 53 provides a User Equipment (UE) device comprising an application processor, a memory, one or more antennas, a wireless interface for allowing the application processor to communicate with another device, and a touch-screen display, the UE device including the apparatus of any of examples 47 through 52.

[00207] Example 54 provides a method comprising: processing, for a User Equipment

(UE), a first transmission carrying one or more control signals for a Channel State

Information Reference Signal (CSI-RS) joint precoding; processing a second transmission carrying CSI-RS; and compensating a phase shift between a first portion of the CSI-RS and a second portion of the CSI-RS based on the one or more control signals for the CSI-RS joint precoding.

[00208] In example 55, the method of example 54, comprising: measuring the CSI-RS carried by the second transmission based upon a joint precoding codebook.

[00209] In example 56, the method of example 55, wherein the joint precoding codebook is generated, for a rank 1 precoder, as: and

wherein the joint precoding codebook is generated, for a rank 2 precoder, as:

and wherein K is a number of antenna panels for the CSI-

RS joint precoding.

[00210] In example 57, the method of example 56, comprising: processing a third transmission carrying K in one of: Downlink Control Information (DCI), or higher-layer signaling.

[00211] In example 58, the method of any of examples 55 through 57, wherein the joint precoding codebook is generated, for a rank 1 precoder, as:

and wherein the joint precoding codebook is generated, for a

rank 2 precoder, as:

wherein

is a total number of

antenna panels.

[00212] In example 59, the method of example 58, comprising: searching a subset from the joint precoding codebook based on a codebook subset restriction.

[00213] Example 60 provides machine readable storage media having machine executable instructions stored thereon that, when executed, cause one or more processors to perform a method according to any of examples 54 through 59.

[00214] Example 61 provides an apparatus of a User Equipment (UE) operable to communicate with an Evolved Node B (eNB) on a wireless network, comprising: means for processing a first transmission carrying one or more control signals for a Channel State Information Reference Signal (CSI-RS) joint precoding; means for processing a second transmission carrying CSI-RS; and means for compensating a phase shift between a first portion of the CSI-RS and a second portion of the CSI-RS based on the one or more control signals for the CSI-RS joint precoding.

[00215] In example 62, the apparatus of example 61, comprising: means for measuring the CSI-RS carried by the second transmission based upon a joint precoding codebook.

[00216] In example 63, the apparatus of example 62, wherein the joint precoding codebook is generated, for a rank 1 precoder, as: and

wherein the joint precoding codebook is generated, for a rank 2 precoder, as:

and wherein K is a number of antenna panels for the CSI-

RS joint precoding.

[00217] In example 64, the apparatus of example 63, comprising: means for processing a third transmission carrying K in one of: Downlink Control Information (DCI), or higher- layer signaling.

[00218] In example 65, the apparatus of any of examples 62 through 64, wherein the joint precoding codebook is generated, for a rank 1 precoder, as:

and wherein the joint precoding codebook is generated, for a

rank 2 precoder, as:

wherein

and wherein 0 is a total number of

antenna panels.

[00219] In example 66, the apparatus of example 65, comprising: means for searching a subset from the joint precoding codebook based on a codebook subset restriction.

[00220] Example 67 provides machine readable storage media having machine executable instructions that, when executed, cause one or more processors of a User

Equipment (UE) operable to communicate with an Evolved Node-B (eNB) on a wireless network to perform an operation comprising: process a first transmission carrying one or more control signals for a Channel State Information Reference Signal (CSI-RS) joint precoding; process a second transmission carrying CSI-RS; and compensate a phase shift between a first portion of the CSI-RS and a second portion of the CSI-RS based on the one or more control signals for the CSI-RS joint precoding.

[00221] In example 68, the machine readable storage media of example 67, the operation comprising: measure the CSI-RS carried by the second transmission based upon a joint precoding codebook.

[00222] In example 69, the machine readable storage media of example 68, wherein the joint precoding codebook is generated, for a rank 1 precoder, as:

and wherein the joint precoding codebook is generated, for a rank 2

precoder, as:

wherein and wherein K is a

number of antenna panels for the CSI-RS joint precoding.

[00223] In example 70, the machine readable storage media of example 69, the operation comprising: process a third transmission carrying K in one of: Downlink Control Information (DCI), or higher-layer signaling.

[00224] In example 71, the machine readable storage media of any of examples 68 through 70, wherein the joint precoding codebook is generated, for a rank 1 precoder, as:

and wherein the joint precoding

codebook is generated, for a rank 2 precoder, as:

wherein

and wherein 0 is a total number of

antenna panels.

[00225] In example 72, the machine readable storage media of example 71, the operation comprising: search a subset from the joint precoding codebook based on a codebook subset restriction.

[00226] In example 73, the apparatus of any of examples 1 through 11, and 47 through

52, wherein the one or more processors comprise a baseband processor.

[00227] In example 74, the apparatus of any of examples 1 through 11, and 47 through

52, comprising a memory for storing instructions, the memory being coupled to the one or more processors.

[00228] In example 75, the apparatus of any of examples 1 through 11, and 47 through

52, comprising a transceiver circuitry for at least one of: generating transmissions, encoding transmissions, processing transmissions, or decoding transmissions.

[00229] In example 76, the apparatus of any of examples 1 through 11, and 47 through

52, comprising a transceiver circuitry for generating transmissions and processing transmissions.

[00230] An abstract is provided that will allow the reader to ascertain the nature and gist of the technical disclosure. The abstract is submitted with the understanding that it will not be used to limit the scope or meaning of the claims. The following claims are hereby incorporated into the detailed description, with each claim standing on its own as a separate embodiment.

Claims

CLAIMS We claim:

1. An apparatus of a User Equipment (UE) operable to communicate with an Evolved Node-B (eNB) on a wireless network, comprising:

a memory to:

store a beam measurement indicator, and

one or more processors to:

process a first Channel State Information Reference Signal (CSI-RS) received through a current UE Receive (Rx) beam when the beam measurement indicator has a first value; and

process a second CSI-RS received through a candidate UE Rx beam when the beam measurement indicator has a second value.

2. The apparatus of claim 1,

wherein the current UE Rx beam is paired in a link with a current Network (NW) beam; and

wherein the candidate UE Rx beam is paired in a link with a candidate NW beam.

3. The apparatus of either of claims 1 or 2, wherein the one or more processors are to: process a transmission configuring the beam measurement indicator.

4. The apparatus of either of claims 1 or 2, wherein the one or more processors are to: measure the first CSI-RS when the beam measurement indicator has the first value; and

generate a report for the first CSI-RS when the beam measurement indicator has the first value.

5. The apparatus of either of claims 1 or 2, wherein the one or more processors are to: measure the second CSI-RS when the beam measurement indicator has the second value; and

generate a report for the first CSI-RS when the beam measurement indicator has the second value.

6. The apparatus of either of claims 1 or 2, wherein the one or more processors are to: process both the first CSI-RS received through the current UE Rx beam and the

second CSI-RS received through the candidate UE Rx beam when the beam measurement indicator has a third value;

measure both the first CSI-RS and the second CSI-RS when the beam measurement indicator has the third value; and

generate a report for both the first CSI-RS and the second CSI-RS when the beam measurement indicator has the third value.

7. Machine readable storage media having machine executable instructions that, when

executed, cause one or more processors of a User Equipment (UE) operable to communicate with an Evolved Node-B (eNB) on a wireless network to perform an operation comprising:

store a beam measurement indicator, and

8. The machine readable storage media of claim 7,

wherein the current UE Rx beam is paired with a current Network (NW) beam; and wherein the candidate UE Rx beam is paired with a candidate NW beam.

9. The machine readable storage media of either of claims 7 or 8, the operation comprising: process a transmission configuring the beam measurement indicator.

10. The machine readable storage media of either of claims 7 or 8, the operation comprising: measure the first CSI-RS when the beam measurement indicator has the first value; and

11. The machine readable storage media of either of claims 7 or 8, the operation comprising: measure the second CSI-RS when the beam measurement indicator has the second value; and

12. The machine readable storage media of either of claims 7 or 8, the operation comprising: process both the first CSI-RS received through the current UE Rx beam and the second CSI-RS received through the candidate UE Rx beam when the beam measurement indicator has a third value;

13. An apparatus of a User Equipment (UE) operable to communicate with an Evolved

Node-B (eNB) on a wireless network, comprising:

one or more processors to:

process a first transmission carrying one or more control signals for a Channel State Information Reference Signal (CSI-RS) joint precoding; process a second transmission carrying CSI-RS; and

compensate a phase shift between a first portion of the CSI-RS and a second portion of the CSI-RS based on the one or more control signals for the CSI-RS joint precoding.

14. The apparatus of claim 13, wherein the one or more processors are to:

measure the CSI-RS carried by the second transmission based upon a joint precoding codebook.

15. The apparatus of claim 14,

wherein the joint precoding codebook is generated, for a rank 1 precoder, as:

wherein the joint precoding codebook is generated, for a rank 2 precoder, as:

wherein is a number of antenna panels for the CSI-RS joint precoding.

16. The apparatus of claim 15, wherein the one or more processors are to:

process a third transmission carrying K in one of: Downlink Control Information (DCI), or higher-layer signaling.

17. The apparatus of any of claims 14 through 16,

wherein the joint precoding codebook is generated, for a rank 1 precoder, as:

wherein the joint precoding codebook is generated, for a rank 2 precoder, as:

wherein 0 is a total number of antenna panels.

18. The apparatus of claim 17, wherein the one or more processors are to:

search a subset from the joint precoding codebook based on a codebook subset restriction.

19. Machine readable storage media having machine executable instructions that, when executed, cause one or more processors of a User Equipment (UE) operable to communicate with an Evolved Node-B (eNB) on a wireless network to perform an operation comprising:

20. The machine readable storage media of claim 19, the operation comprising:

measure the CSI-RS carried by the second transmission based upon ajoint precoding codebook.

21. The machine readable storage media of claim 20,

wherein the joint precoding codebook is generated, for a rank 1 precoder,

wherein the joint precoding codebook is generated, for a rank 2 precoder,

wherein K is a number of antenna panels for the CSI-RS joint precoding.

22. The machine readable storage media of claim 21, the operation comprising:

23. The machine readable storage media of any of claims 20 through 22,

wherein the joint precoding codebook is generated, for a rank 1 precoder, as:

wherein the joint precoding codebook is generated, for a rank 2 precoder, as:

wherein and

wherein 0 is a total number of antenna panels.

24. The machine readable storage media of claim 23, the operation comprising: