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`SYSTEMS
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`2016-10-21
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`10
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`10
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`
`QUALCOMM Ref. No.: 170417Pl
`
`1
`
`MULTIPLEXING INITIAL ACCESS AND DATA TRANSMISSIONS IN
`
`ASSISTED MILLIMETER WA VE SYSTEMS
`
`INTRODUCTION
`
`[0001]
`
`Aspects of the present disclosure relate to wireless communications, and
`
`more particularly, to a base station (BS) assisting a user equipment (UE) in establishing
`
`initial access with another BS.
`
`[0002] Wireless communication systems are widely deployed to provide various
`
`telecommunication services such as telephony, video, data, messaging, and broadcasts.
`
`Typical wireless communication systems may employ multiple-access technologies
`
`capable of supporting communication with multiple users by sharing available system
`
`resources (e.g., bandwidth, transmit power).
`
`Examples of such multiple-access
`
`technologies include Long Term Evolution (L TE) systems, code division multiple
`
`access (CDMA) systems, time division multiple access (TDMA) systems, frequency
`
`division multiple access (FDMA) systems, orthogonal frequency division multiple
`
`access
`
`(OFDMA)
`
`systems,
`
`single-carrier
`
`frequency division multiple access
`
`(SC-FDMA) systems, and time division synchronous code division multiple access
`
`(TD-SCDMA) systems.
`
`[0003]
`
`In some examples, a wireless multiple-access communication system may
`
`include a number of base stations, each simultaneously supporting communication for
`
`multiple communication devices, otherwise known as user equipment (UEs). In LTE or
`
`LTE-A network, a set of one or more base stations may define an eNodeB (eNB).
`
`In other examples (e.g., in a next generation or 5G network), a wireless multiple access
`
`communication system may include a number of distributed units (DUs) (e.g., edge
`
`units (EUs), edge nodes (ENs), radio heads (RHs), smart radio heads (SRHs),
`
`transmission reception points (TRPs), etc.) in communication with a number of central
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`units (CUs) (e.g., central nodes (CNs), access node controllers (ANCs), etc.), where a
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`set of one or more distributed units, in communication with a central unit, may define an
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`access node (e.g., a new radio base station (NR BS), a new radio node-B (NR NB), a
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`network node, 5G NB, gNB, etc.). A base station or DU may communicate with a set of
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`UEs on downlink channels (e.g., for transmissions from a base station or to a UE) and
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`uplink channels (e.g., for transmissions from a UE to a base station or distributed unit).
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`[0004]
`
`These multiple access
`
`technologies have been adopted
`
`in vanous
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`telecommunication standards to provide a common protocol that enables different
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`wireless devices to communicate on a municipal, national, regional, and even global
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`level. An example of an emerging telecommunication standard is new radio (NR), for
`
`example, 5G radio access. NR is a set of enhancements to the LTE mobile standard
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`promulgated by Third Generation Partnership Project (3GPP). It is designed to better
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`support mobile broadband Internet access by improving spectral efficiency, lowering
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`costs, improving services, making use of new spectrum, and better integrating with
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`other open standards using OFDMA with a cyclic prefix (CP) on the downlink (DL) and
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`on the uplink (UL) as well as support beamforming, multiple-input multiple-output
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`(MIMO) antenna technology, and carrier aggregation.
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`[0005]
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`However, as the demand for mobile broadband access continues to increase,
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`there exists a need for further improvements in NR technology. Preferably, these
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`improvements should be applicable to other multi-access technologies and the
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`telecommunication standards that employ these technologies.
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`BRIEF SUMMARY
`
`[0006]
`
`The systems, methods, and devices of the disclosure each have several
`
`aspects, no single one of which is solely responsible for its desirable attributes. Without
`
`limiting the scope of this disclosure as expressed by the claims which follow, some
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`features will now be discussed briefly. After considering this discussion, and
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`particularly after reading the section entitled "Detailed Description" one will understand
`
`how the features of this disclosure provide advantages
`
`that include improved
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`communications between access points and stations in a wireless network.
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`[0007]
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`Certain aspects of the present disclosure relate to methods and apparatus for
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`assisting a UE in performing initial access to a BS. As described herein, a first BS may
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`communicate, in a first time interval, with at least a first user equipment (UE), via
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`directional transmissions using a first set of frequency resources and participate in initial
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`access, during the first time interval, with at least a second UE, via directional
`
`transmissions using a second set of frequency resources.
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`[0008]
`
`Aspects generally include methods, apparatus, systems, computer readable
`
`mediums, and processing systems, as substantially described herein with reference to
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`and as illustrated by the accompanying drawings.
`
`[0009]
`
`To the accomplishment of the foregoing and related ends, the one or more
`
`aspects comprise the features hereinafter fully described and particularly pointed out in
`
`the claims. The following description and the annexed drawings set forth in detail
`
`certain illustrative features of the one or more aspects. These features are indicative,
`
`however, of but a few of the various ways in which the principles of various aspects
`
`may be employed, and this description is intended to include all such aspects and their
`
`equivalents.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`[0010]
`
`So that the manner in which the above-recited features of the present
`
`disclosure can be understood in detail, a more particular description, briefly summarized
`
`above, may be had by reference to aspects, some of which are illustrated in the
`
`appended drawings.
`
`It is to be noted, however, that the appended drawings illustrate
`
`only certain typical aspects of this disclosure and are therefore not to be considered
`
`limiting of its scope, for the description may admit to other equally effective aspects.
`
`[0011]
`
`FIG. 1
`
`is a block diagram conceptually
`
`illustrating an example
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`telecommunications system,
`
`in accordance with certain aspects of the present
`
`disclosure.
`
`[0012]
`
`FIG. 2 is a block diagram illustrating an example logical architecture of a
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`distributed RAN, in accordance with certain aspects of the present disclosure.
`
`[0013]
`
`FIG. 3 is a diagram illustrating an example physical architecture of a
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`distributed RAN, in accordance with certain aspects of the present disclosure.
`
`[0014]
`
`FIG. 4 is a block diagram conceptually illustrating a design of an example
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`BS and user equipment (UE), in accordance with certain aspects of the present
`
`disclosure.
`
`[0015]
`
`FIG. 5 is a diagram showing examples for implementing a communication
`
`protocol stack, in accordance with certain aspects of the present disclosure.
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`[0016]
`
`FIG. 6 illustrates an example of a DL-centric subframe, in accordance with
`
`certain aspects of the present disclosure.
`
`[0017]
`
`FIG. 7 illustrates an example of an UL-centric subframe, in accordance with
`
`certain aspects of the present disclosure.
`
`[0018]
`
`FIG. 8 illustrates an example wireless communication system, in which
`
`aspects of the present disclosure may be implemented.
`
`[0019]
`
`FIG. 9 example operations performed by a base station, in accordance with
`
`certain aspects of the present disclosure.
`
`[0020]
`
`FIG. 10 illustrates an example assisted millimeter wave system with
`
`multiplexing of initial access and data transmissions, in accordance with certain aspects
`
`of the present disclosure.
`
`[0021]
`
`To facilitate understanding, identical reference numerals have been used,
`
`where possible, to designate identical elements that are common to the figures.
`
`It is
`
`contemplated that elements disclosed in one aspect may be beneficially utilized on other
`
`aspects without specific recitation.
`
`DETAILED DESCRIPTION
`
`[0022]
`
`Aspects of the present disclosure provide apparatus, methods, processing
`
`systems, and computer readable mediums for new radio (NR) (new radio access
`
`technology or 5G technology).
`
`[0023]
`
`NR may support various wireless communication services, such as Enhanced
`
`mobile broadband (eMBB) targeting wide bandwidth (e.g. 80 MHz beyond), millimeter
`
`wave (mmW) targeting high carrier frequency (e.g. 60 GHz), massive MTC (mMTC)
`
`targeting non-backward compatible MTC techniques, and/or mission critical targeting
`
`ultra