WO2017171867A1 - Formation de faisceau hybride en boucle ouverte et en boucle fermée - Google Patents

Formation de faisceau hybride en boucle ouverte et en boucle fermée Download PDF

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Publication number
WO2017171867A1
WO2017171867A1 PCT/US2016/025701 US2016025701W WO2017171867A1 WO 2017171867 A1 WO2017171867 A1 WO 2017171867A1 US 2016025701 W US2016025701 W US 2016025701W WO 2017171867 A1 WO2017171867 A1 WO 2017171867A1
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WIPO (PCT)
Prior art keywords
transmission
transmission beams
signals
beams
logic
Prior art date
Application number
PCT/US2016/025701
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English (en)
Inventor
Yeong-Sun Hwang
Franz Eder
Huaning Niu
Yuan Zhu
Yushu Zhang
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Intel IP Corporation
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Publication date
Application filed by Intel IP Corporation filed Critical Intel IP Corporation
Priority to CN201680082756.2A priority Critical patent/CN108702182B/zh
Priority to PCT/US2016/025701 priority patent/WO2017171867A1/fr
Priority to TW106106230A priority patent/TWI815792B/zh
Publication of WO2017171867A1 publication Critical patent/WO2017171867A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection

Definitions

  • Embodiments herein generally relate to communications between devices in broadband wireless communications networks.
  • a beamforming entity In open-loop beamforming systems, a beamforming entity typically selects one or more transmission beams for use without any feedback information from a remote entity that receives transmissions from the beamforming entity. In closed- loop beamforming systems, the beamforming entity typically selects one or more transmission beams for use based on feedback information from the remote entity. Open-loop beamforming systems generally provide reduced computation and signaling overhead associated with the beamforming selection process.
  • Closed-loop beamforming systems generally provide improved beam performance but at the expense of significant computation and signaling overhead.
  • Improved beamforming systems, including beamforming techniques for 5G systems have yet to be developed that overcome these deficiencies of conventional open-loop and closed-loop beamforming systems.
  • FIG. 1 illustrates an exemplary operating environment.
  • FIG. 2 illustrates an embodiment of a first logic flow.
  • FIG. 3 illustrates a first exemplary transmission structure
  • FIG. 4a illustrates an exemplary decoding of the transmission structure of FIG. 3.
  • FIG. 4b illustrates an exemplary feedback structure relating to the transmission structure of FIG. 3.
  • FIG. 4c illustrates an exemplary retransmission relating to the transmission structure of FIG. 3.
  • FIG. 5 illustrates a second exemplary transmission structure.
  • FIG. 6 illustrates a third exemplary transmission structure.
  • FIG. 7 illustrates an embodiment of a second logic flow.
  • FIG. 8 illustrates an embodiment of a storage medium.
  • FIG. 9 illustrates an embodiment of a first device.
  • FIG. 10 illustrates an embodiment of a second device.
  • FIG. 11 illustrates an embodiment of a wireless network.
  • a beamforming entity can transmit reference signals to a remote entity using a set of candidate transmission beams.
  • the remote entity can provide a first indication to the beamforming entity identifying a first set of preferred transmission beams based on the received reference signals.
  • the first set of preferred transmission beams can be a subset of the set of candidate transmission beams.
  • the beamforming entity can transmit data signals using the first set of preferred transmission beams.
  • the remote device can provide a second indication to the beamforming entity identifying a second set of preferred transmission beams.
  • the second set of preferred transmission beams can be a subset of the first set of preferred transmission beams.
  • the beamforming entity can retransmit certain previously transmitted data signals using the second set of preferred transmission beams.
  • Other embodiments are described and claimed.
  • Various embodiments may comprise one or more elements.
  • An element may comprise any structure arranged to perform certain operations.
  • Each element may be implemented as hardware, software, or any combination thereof, as desired for a given set of design parameters or performance constraints.
  • an embodiment may be described with a limited number of elements in a certain topology by way of example, the embodiment may include more or less elements in alternate topologies as desired for a given implementation.
  • any reference to "one embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrases “in one embodiment,” "in some
  • the techniques disclosed herein may involve transmission of data over one or more wireless connections using one or more wireless mobile broadband technologies.
  • various embodiments may involve transmissions over one or more wireless connections according to one or more 3rd Generation Partnership Project (3GPP), 3GPP Long Term
  • LTE Long Term Evolution
  • LTE-A 3 GPP LTE- Advanced technologies and/or standards, including their revisions, progeny and variants - including 4G and 5G wireless networks.
  • GSM Global System for Mobile Communications
  • EDGE Universal Mobile Telecommunications System
  • UMTS Universal Mobile Telecommunications System
  • HSPA High Speed Packet Access
  • GSM/GPRS GSM with General Packet Radio Service
  • wireless mobile broadband technologies and/or standards may also include, without limitation, any of the Institute of Electrical and Electronics Engineers (IEEE) 802.16 wireless broadband standards such as IEEE 802.16m and/or 802.16p, International Mobile
  • CDMA 2000 e.g., CDMA2000 lxRTT, CDMA2000 EV-DO, CDMA EV-DV, and so forth
  • HSDPA Downlink Packet Access
  • OFDM Orthogonal Frequency-Division Multiplexing
  • HOPA High Speed Orthogonal Frequency-Division Multiplexing
  • HSUPA High-Speed Uplink Packet Access
  • Some embodiments may additionally or alternatively involve wireless communications according to other wireless communications technologies and/or standards. Examples of other wireless communications technologies and/or standards that may be used in various embodiments may additionally or alternatively involve wireless communications according to other wireless communications technologies and/or standards. Examples of other wireless communications technologies and/or standards that may be used in various embodiments may additionally or alternatively involve wireless communications according to other wireless communications technologies and/or standards. Examples of other wireless communications technologies and/or standards that may be used in various
  • embodiments may include, without limitation, other IEEE wireless communication standards such as the IEEE 802.11, IEEE 802.11a, IEEE 802.11b, IEEE 802.1 lg, IEEE 802.11 ⁇ , IEEE 802. l lu, IEEE 802.1 lac, IEEE 802.1 lad, IEEE 802.11af, and/or IEEE 802.11ah standards, High-Efficiency Wi-Fi standards developed by the IEEE 802.11 High Efficiency WLAN (HEW) Study Group, Wi-Fi Alliance (WFA) wireless communication standards such as Wi-Fi, Wi-Fi Direct, Wi-Fi Direct Services, Wireless Gigabit (WiGig), WiGig Display Extension (WDE), WiGig Bus Extension (WBE), WiGig Serial Extension (WSE) standards and/or standards developed by the WFA Neighbor Awareness Networking (NAN) Task Group, machine-type communications (MTC) standards such as those embodied in 3GPP Technical Report (TR) 23.887, 3 GPP Technical Specification (TS) 22.368, and/or 3 GPP TS 23.682, and/or near-field communication
  • FIG. 1 illustrates an exemplary operating environment 100 such as may be representative of some embodiments in which techniques for hybrid open-loop and/or closed-loop
  • the operating environment 100 can include a mobile device 102 and a cellular base station 104.
  • the mobile device 102 can communicate with the base station 104 over a wireless communications interface 106.
  • the mobile device 102 can be a smartphone, tablet, laptop, netbook, or other mobile computing device capable of
  • the mobile device 102 can be a user equipment (UE).
  • the base station 104 can be a cellular base station such as, for example, an evolved node B (eNB).
  • eNB evolved node B
  • the base station 104 can be a serving cell for the UE 102 such as, for example, a primary or secondary serving cell.
  • the wireless communications interface 106 can be, for example, a wireless interface for any of the wireless networks or standards described herein including, for example, a 4G, LTE, or 5G wireless network.
  • the mobile device 102 and the base station 104 can each implement the hybrid open- loop and closed- loop beamforming techniques described herein.
  • Beamforming is a signal processing technique used to control the directionality of the transmission and reception of wireless signals. By controlling the directional patterns of antennas, beamforming can improve signal quality at an intended receiver while reducing interference. Beamforming is likely to be a key feature of 5G systems which may operate in higher frequency bands that have unattractive attenuation characteristics.
  • beamforming can be either open- loop, closed-loop, or hybrid open-loop and closed-loop.
  • a beamforming entity e.g., either the mobile device 102 or the base station 104 selects its own beam without any information from any other entity (e.g., a remote device or entity that can be in communication with the beamforming entity).
  • closed-loop beamforming some form of information provided by the other device in communication with the beamforming entity is made available to the beamforming entity. Beam selection by the beamforming entity can be based on the available information from the remote device.
  • Hybrid open-loop and closed- loop beamforming as described further herein, can include both open-loop and closed- loop beamforming features.
  • a closed-loop beamforming process can be implicit or explicit.
  • the beamforming entity e.g., either the mobile device 102 or the base station 104
  • This non-explicit information may comprise a reference signal.
  • the other entity in communication with the beamforming entity selects a preferred beam.
  • the beam selection can be provided to the beamforming entity as feedback information.
  • the beam selection can be based on a reference signal transmitted previously by the
  • the reference signal can be carried or transmitted by one or more candidate beams.
  • Beam selection based on explicit feedback can use a finite-sized beam index (BI) to uniquely identify the candidate beams based on distinct BI values.
  • BI beam index
  • any performance gain achievable in a beamforming system can depend on the selected beam. Performance gains can be adversely affected by inaccurate beam selections. Beam selections may be inaccurate for a number of reasons including, for example, changes to the communication channel (e.g., the beamforming entity or the other entity may be fast moving), cross-talk among beams in a multiple beam system, and variations between uplink and downlink transmissions (e.g., propagation characteristics may vary such that an uplink beam is suboptimal if selected based on downlink information). To improve beam selection, many beamforming selection techniques focus on closed-loop solutions. Pure closed-loop beam forming systems, however, can impose significant burdens and costs on the communication system in terms of increased computation and signaling overhead.
  • the hybrid open-loop and/or closed-loop beamforming techniques described herein can enhance open- loop beamforming with closed- loop beam set preselection and refinement.
  • an efficient refinement of initially selected beams is provided by having a remote device indicate a preferred subset of beams to the beamforming entity based on error detection results of data blocks transmitted using the initially selected beams.
  • the techniques described herein provide enhanced efficiency (e.g., by reducing signaling or feedback overhead) and enhanced robustness (e.g., by improved beamforming selection and/or performance).
  • the hybrid open-loop and/or closed-loop beamforming techniques described herein cycle through multiple beams in the time-domain (or the frequency domain), with one beam used for one or more codeblocks.
  • beam selection can be adaptive by reducing the set of beams used for retransmission (e.g., in a hybrid automatic repeat request (HARQ) scheme) based on error detection results of codeblocks that can be correlated to particular beams.
  • HARQ hybrid automatic repeat request
  • the hybrid open-loop and/or closed-loop beamforming techniques described herein can be applicable to 3GPP LTE Release 14 and 5G systems but are not so limited.
  • frequency domain beam-cycling techniques e.g., hybrid open-loop and/or closed-loop analog beamforming techniques
  • the various frequency domain beam-cycling techniques described herein can transmit information (such as data, control or reference signals) using multiple beams, with the beams cycled through over available frequency resources (e.g., frequency bands) in a predefined manner.
  • FIG. 2 illustrates an example of a logic flow 200 that may be representative of the implementation of one or more of the disclosed hybrid open-loop and closed- loop beamforming techniques according to various embodiments.
  • logic flow 200 may be
  • mobile device 102 e.g., as a UE
  • base station 104 e.g., as an eNB
  • a beamforming entity can transmit one or more reference signals using one or more candidate transmission beams.
  • the reference signals can be transmitted to a remote entity (e.g., a second beamforming entity).
  • the reference signals may be periodic signals having a large period. For example, the reference signals can be transmitted relatively infrequently.
  • the candidate transmission beams can be predefined and can be known to the beamforming entity and the remote entity that receives the reference signals.
  • the candidate transmission beams can each be associated with a unique identifier or identification (ID).
  • ID unique identifier or identification
  • the entity that receives the reference signals can select a reception beam for one or more of the candidate transmission beams.
  • the remote entity that receives the reference signals can select a preferred set of transmission beams.
  • the preferred set of transmission beams can be a subset of the candidate transmission beams.
  • the remote entity can use a variety of metrics to select the preferred set of transmission beams.
  • the preferred set of transmission beams can be determined based on the signal to noise ratio of the received reference signals, the highest signal strength of the received reference signals, and/or errors associated with recovering, decoding, or processing the received reference signals.
  • the preferred set of transmission beams can be communicated by the remote entity to the beamforming entity that transmitted the reference signals using the candidate transmission beams. Accordingly, at 204, the beamforming entity can receive feedback information from the remote entity.
  • the feedback information can include identification of the preferred set of transmission beams using, for example, the predefined transmission beam identifiers (IDs) associated with each transmission beam.
  • the remote entity can provide the beamforming entity with one or more IDs to specify the set of preferred transmission beams.
  • the IDs associated with each transmission beam can be predetermined or predefined relative to the beamforming entity and the remote device.
  • step 204 can be considered to provide a closed-loop portion of the logic flow 200.
  • the beamforming entity can transmit data signals using the set of transmission beams selected and/or identified by the remote entity.
  • the selected transmission beams can each transmit one or more data signals.
  • the data signals can be transmitted, for example, over a subframe with one transmission beam used for one or more codeblocks of the subframe.
  • the use of the transmission beams can be cycled through the group of selected transmission beams over the codeblock groups.
  • the association of a particular transmission beam (e.g., the beam ID) to a particular set of data signals (e.g., a codeblock group containing one or more codeblocks) can follow a predefined pattern based on the set of identified transmission beams.
  • the transmission beams can be used in numerical order based on their IDs and by cycling through the IDs.
  • the predefined pattern or cycling through the selected set of transmission beams can be known to the beamforming entity and the remote entity that receives the data signals from the beamforming entity.
  • Step 206 can be considered to provide an open- loop portion of the logic flow 200.
  • the data signals transmitted by the beamforming entity can be partitioned into transmission time intervals (TTIs), with a TTI representing a temporal format containing one or more blocks of coded signals.
  • TTIs transmission time intervals
  • the blocks of coded signals can be denoted as codeblocks.
  • decoding a codeblock can be performed independently of other codeblocks.
  • a TTI can be considered to be a subframe. The techniques are not limited to these embodiments.
  • each codeblock can employ an error detection mechanism such as, for example, a cyclic redundancy check (CRC).
  • CRC cyclic redundancy check
  • each codeblock can be decoded with either "pass" or "fail" results. If a codeblock is not correctly decoded (e.g., if a codeblock is decoded with a "fail” result), a receiver can request retransmission of the error codeblock.
  • a beamforming entity and a receiving entity involved in the performance of logic flow 200 can implement a HARQ retransmission scheme.
  • each subframe carrying coded data signals can contain one or more HARQ blocks such that each HARQ block contains one or more codeblocks.
  • the HARQ mechanism
  • each codeblock can correspond to an OFDM symbol.
  • hybrid beamforming techniques described herein are applicable to the use of beams for each encoded data block that can be decoded separately and independently and which can include its own error correction/detection mechanism such that the divisible data blocks, if not correctly decoded, can be retransmitted.
  • the remote entity can attempt to decode each codeblock transmitted by the beamforming entity.
  • each received codeblock or grouping of coded data can be transmitted with a particular transmission beam from the set of preferred transmission beams. If any codeblock or grouping of coded data is not correctly decoded (e.g., if a decoding operation for a codeblock results in a fail), then the remote entity can provide such information to the beamforming entity. This information can be considered to be feedback information transmitted by the remote device and received by the beamforming device.
  • the HARQ feedback for a HARQ block containing the at least one codeblock that was not decoded correctly can be a non-acknowledgement (NACK) message.
  • NACK non-acknowledgement
  • the remote entity can provide an indication of a second set of transmission beams.
  • This second set of transmission beams can be a subset of the first set of preferred transmission beams.
  • the second set of transmission beams can exclude any transmission beam from the first set of transmission beams associated with failed decoding results. For example, a particular transmission beam associated with a codeblock that resulted in a fail decoding can be excluded from the second set of transmission beams.
  • the second set of transmission beams identified by the remote device to the beamforming entity can be transmission beams from the first set of transmission beams that are associated with codeblocks that were successfully decoded.
  • the second set of transmission beams identified by the remote device is received by the beamforming entity.
  • the indication or indicator from the remote device can be in a shorter or smaller format than the indictor used to identify the first set of transmission beams.
  • the identifier can be an indication of the position of a particular transmission beam within the set of first transmission beams (e.g., an identifier indicating that the fifth transmission beam in the first set of transmission beams is to form part of the second set of transmission beams).
  • the indicator from the remote entity can identify a single transmission beam. Step 208 can be considered to provide a closed-loop portion of the logic flow 200.
  • the beamforming entity can retransmit one or more data signals using transmission beams from the second set of transmission beams.
  • the data signals can be transmitted by cycling through the second set of transmission beams in a known, predefined manner (e.g., numerical order based on IDs of the transmission beams).
  • the beamforming entity can retransmit all of the data signals of an entire HARQ block based on the second set of transmission beams (e.g., including codeblocks that were previously successfully decoded).
  • the beamforming entity can retransmit only the codeblocks that were not successfully decoded previously.
  • Step 210 can be considered to provide an open- loop portion of the logic flow 200.
  • step 208 can be performed as an open-loop component of the logic flow 200. That is, the beamforming entity can receive from the remote device an indication that a particular HARQ block or particular codeblock failed but not also indicate a second set of transmission beams. Under such a scenario, in various embodiments, the beamforming entity can shuffle the order of the transmission beams from the first set of transmission beams for use in retransmitting the codeblocks and/or HARQ blocks. This shuffling of the order of the transmission beams can be considered to be a re-mapping of the transmission beams onto the codeblocks (e.g., such that each retransmitted codeblock is transmitted using a different transmission beam).
  • the logic flow 200 is extendible to multiple-input and multiple-output (MIMO) systems which may use multiple transmission beams to transmit a single codeblock.
  • MIMO multiple-input and multiple-output
  • the first and second set of transmission beam IDs can indicate transmission beam combinations (e.g., a particular indicator can indicate a combination of transmission beams).
  • the transmission beam combinations as identified can fully identify all of the transmission beams to be used for transmitting a particular codeblock.
  • hybrid open-loop and/or closed- loop beamforming techniques described herein are applicable to both time and frequency domain beam cycling using any data structures or partitioning of data for transmission.
  • FIG. 3 illustrates an exemplary transmission structure 300 based on the hybrid open-loop and closed-loop beamforming techniques described herein.
  • the transmission structure 300 can be transmitted by a beam forming entity such as, for example, a beamforming entity
  • the transmission structure 300 can be provided by the mobile device 102 or the base station 104 operating as a beamforming entity as described herein.
  • a beamforming entity Prior to providing the transmission structure 300, a beamforming entity can transmit one or more reference signals using one or more candidate transmission beams. Further, prior to providing the transmission structure 300, a remote device that receives and processes the reference signals can indicate to the beam forming entity a first set of preferred transmission beams. As an example, the first set of preferred transmission beams can include four distinct transmission beams. The first set of preferred transmission beams can be identified in a variety of manners including, for example, using IDs that uniquely identify each transmission beam.
  • the beamforming entity can transmit data signals intended for the remote device using the first set of preferred transmission beams.
  • the data signals can be transmitted in accordance with the transmission structure 300.
  • a subframe 302 includes a first HARQ block 304 and a second HARQ block 306.
  • Each HARQ block 304 and 306 can contain one or more codeblocks 308.
  • each codeblock 308 can correspond to an OFDM symbol and a HARQ block can correspond to a codeblock group.
  • a different transmission beam, identified by a transmission beam identifier 310 is used to transmit each codeblock 308.
  • the transmission beams can be cyclically used to transmit the codeblocks 308.
  • transmission beams identified by IDs "2", "4", "7", and “8" are used in succession in a cyclic manner.
  • the sequence of this use of the transmission beams can be predefined and known to the beamforming entity and the remote device.
  • FIG. 3 shows that the transmission beam identified by the fourth-smallest ID value of "8" is used to transmit the fourth codeblock in the HARQ block 304.
  • the transmission structure 300 can be part of a physical downlink shared channel (PDSCH), with one transmission beam per OFDM symbol, and with a cycling through the first set of transmission beams over the OFDM symbols.
  • PDSCH physical downlink shared channel
  • the association of an OFDM symbol to a transmission beam ID may follow the order of the transmission beam IDs in the first set of preferred beams and can be implicitly known to all entities.
  • FIGs. 4a illustrates an exemplary decoding of the transmission structure 300.
  • the remote device receives the transmission structure 300 of FIG. 3 and performs a CRC check. As shown in FIG. 4a, each codeblock 308 is either decoded correctly - as shown by a "PASS" indication 402 - or is decoded incorrectly - as shown by a "FAIL" indication 404.
  • the remote device can indicate to the beamforming device which codeblocks 308 failed. In various embodiments, if at least one codeblock 308 within HARQ block 304 or 306 failed, then the remote device can provide feedback to the beamforming device that includes a HARQ
  • the NACK along with a second set of identifiers for identifying a second set of transmission beams.
  • the identifiers for the second set of transmission beams can correspond to a unique positon of a particular transmission beam as used in the prior transmission.
  • the transmission beams included in the second set include beams associated with CRC passes 402.
  • FIG. 4b illustrates an exemplary feedback provided by the remote device.
  • the feedback provided by the remote device can be a HARQ feedback.
  • a successful acknowledgement (ACK) indication 406 is provided for the second HARQ block 306 since all codeblocks 308 in the second HARQ block 306 passed the CRC check shown in FIG. 4a.
  • an unsuccessful NACK indication 404 is provided for the first HARQ block 304 since at least one codeblock 308 in the first HARQ block 304 failed the CRC check shown in FIG. 4a.
  • the remote device can provide an indication 410 identifying a second set of transmission beams.
  • the second set of transmission beams can include one or more transmission beams.
  • the identification from the remote device can specify a position of a transmission beam within the HARQ block 304 to use for retransmission. As shown in FIG. 4b, the identification is "01" indicating the second transmission beam from the HARQ block 304 - that is, beam identified with ID "4" as shown in FIG. 3 - is to be used for retransmission.
  • the second set of transmission beams can include at most three beams and at least one beam.
  • the second set of transmission beams can include a single transmission beam.
  • the second identifier identifying the second set of transmission beams can be in the form of a two-bit field representing the four possible beam ID positions of the first set of beams.
  • FIG. 4c illustrates an exemplary HARQ retransmission.
  • the HARQ retransmission (indicated as "304-1" in FIG. 4c) can include each of the codeblocks 308 from the first HARQ block 304 retransmitted using the transmission beam identified in the indicator 410. As can be seen, each codeblock 308 is retransmitted using the transmission beam having an ID 310 value of "4." In various embodiments, if more than one transmission beam is identified for or included in the second set of transmission beams, then the transmission beams can be cycled through as used for the codeblocks 308 being retransmitted.
  • FIG. 3 shows a time-domain beam cycling assignment based on the first set of transmission beams.
  • FIG. 3 shows that beam 2 is assigned to the first OFDM symbol, beam 4 is assigned to the second OFDM symbol, beam 7 is assigned the third OFDM symbol, and beam 8 is assigned to the fourth OFDM symbol. Since there are more OFDM symbols in the block than beams in the first set of beams, the beams are re-used in a cyclical manner such that beam 2 is assigned the fifth OFDM symbol. The cyclical use of the beams can continue into the next block as shown in FIG. 3.
  • FIGs. 4a-4c can be considered to show beam refinement operations.
  • a CRC check operation reveals that third and fifth codeblocks 308 of the first HARQ block 304 contain errors.
  • FIG. 4b shows that HARQ feedback for the first HARQ block 304 includes a NACK 406 and a two bit field 410 having a value "01" indicating that the second beam from the first set of beams is to form the second set of beams (i.e., used for
  • the second beam is the beam identified with an ID value 310 of "4.” Accordingly, FIG. 4c shows that the "4" beam is used.
  • other indicators can be used to indicate the transmission beams to use for retransmission. For example, a four-bit field of "0101" can be used indicating that the second and fourth beams from the first set of transmission beams are to be used in the second set of transmission beams.
  • the choice e.g., by the remote entity
  • the choice as to which transmission beams to use for retransmission can be based on instantaneous error detection (e.g., CRC checks) at the subframes or can be based on a history of error detection results accumulated over multiple subframes.
  • the hybrid open- loop and/or closed-loop beamforming techniques described herein in comparison to fully closed-loop beamforming systems, provides higher efficiency by significantly reducing the amount and frequency of beam selection feedback and provides improved resilience to beam failures by providing a degree of beam selection diversity.
  • the techniques described herein provide more robust beamforming performance by pre-screening and selecting the beams with higher likelihood of being robust for the initial set of open-loop beams.
  • the time-domain beam-cycling techniques described herein may be more likely implemented by mobile devices (e.g., a UE) based on processing constraints of such devices and may be more likely
  • a feedback mechanism may be employed for indicating a preferred modulation and coding rate (MCS) and a preferred number of MIMO layers.
  • MCS modulation and coding rate
  • CQI channel quality indicator
  • RI rank indication
  • CQI and RI can be based on a dedicated reference signal - a channel state information reference signal (CSI-RS).
  • CSI-RS channel state information reference signal
  • CQI and RI can be conditional on a transmission beam.
  • each CSI-RS would be associated with a particular transmission beam (and therefore beam index referencing the transmission beam).
  • beam index, CQI, and RI can constitute a portion of the channel state information (CSI) provided as feedback information from a remote device to a
  • Various embodiments described herein provide an open- loop beamforming system and process that can include an enhanced CSI feedback framework and enhanced data and control transmission framework.
  • Various embodiments disclose an open-loop transmission mode for communication systems that can cycle transmission beams through frequency resources to provide beam diversity without the need for beam selection feedback from a remote device while reducing signaling overhead.
  • CSI generated by a remote device e.g., the mobile device 102 or the base station 104 and feedback to a beamforming entity can include CQI and RI but does not include beam index (BI).
  • each CRG may be carried by the entire set of candidate transmission beams.
  • the CRG can be transmitted by all of the candidate transmission beams using frequency diversity (e.g., such that the CRG is transmitted at the same time over different frequencies for each candidate transmission beam).
  • the set of candidate transmission beams can be considered to be a transmission beam cluster and can be the candidate transmission beams for use with a data channel (e.g., PDSCH) and/or a control channel (e.g., PDCCH).
  • feedback CSI can be based on CRGs where the transmission beams associated with a particular CRG are cycled through over available subcarrier frequencies associated with the CRG.
  • Reported CSI can include a wideband CQI (e.g., one or more codeword specific wideband CQIs) and/or a subband CQI.
  • reported CSI can include a wideband RI.
  • reported CSI may include the CQI and RI measured from each received symbol. For bilateral beamforming, different reception beams may be used to measure the CSI for each received symbol.
  • a beam reference signal (BRS) and BRS reception power (BRS-) BRS-
  • a remote device e.g., the UE 102 may use BRS-RP for reception beam selection in a bilateral beamforming system or may use BRS-RP to cull the set of transmission beams used for a particular remote device by a beam forming entity (e.g., the base station 104).
  • the remote device may report one or more BRS-RPs, with each BRS-RP measured from a group of multiple BRSs.
  • the BRSs of a BRS group may be associated with multiple transmission beams and may be associated with the transmission beam cluster.
  • the BRS group may be indicated by radio resource control (RRC) signaling.
  • RRC radio resource control
  • the grouping of the BRS may depend on the frequency resource of the BRS and a BRS identification (BRS-ID).
  • BRS-ID BRS identification
  • the number of BRSs in a BRS group may be determined as: where Ng ⁇ inidicates the number of resource block groups (RBGs) for a BRS and K is an integer.
  • RBGs and K can each be configured by the network or RRC signaling for example.
  • K can be an integer such that K e [1, /3 ⁇ 4 ⁇
  • FIG. 5 illustrates an exemplary transmission structure 500.
  • the exemplary transmission structure 500 can include control and/or data information and can represent a structure for transmitting information or a control channel and/or a data channel.
  • M transmission beams are used - indicated by transmission beams 502-1, . . . , 502-M-l, 502-M.
  • the transmission beams 502 are cycled through available frequency resources. That is, M transmission beams 502 are used for approximately simultaneous transmission over a range of distinct frequencies.
  • Each transmission beam 502 can carry at least one resource block 504.
  • Each transmission beam 502 can carry the same resource block 504 (over a different frequency using a different transmission beam) or different resource blocks.
  • a remote device that receives the transmission structure 500 can perform channel estimation for each RB.
  • FIG. 6 illustrates an exemplary transmission structure 600.
  • the exemplary transmission structure 600 can include control and/or data information and can represent a structure for transmitting information or a control channel and/or a data channel.
  • the transmission structure 600 can represent a TTI bundling for use with the above-described transmission modes.
  • M transmission beams are used - indicated by transmission beams 602-1, 602-M-l, 602-M.
  • a different transmission beam may be applied to a different subframe 604.
  • each subframe 604 can represent a TTI.
  • the number of bundled TTIs may be equal to M.
  • One or more RBs can be included in each TTI and/or subframe 604.
  • channel estimation may be performed over multiple RBs.
  • FIGs. 5 and 6 can represent transmission structures 500 and 600, respectively, over a PDSCH but are not so limited.
  • the transmission structures 500 and 600 may be provided by a system as selectable transmission schemes that can be selected, for example, by RRC signaling.
  • control channel information can be transmitted according to the transmission structures 500 and 600.
  • a physical downlink control channel (PDCCH) can use beamforming according to the techniques described herein based on the transmission structures 500 and 600.
  • different transmission beams may carry different RBs (e.g., if the PDCCH can be transmitted in a manner similar to an enhanced physical downlink control channel - EPDCCH).
  • a control channel e.g., PDCCH
  • the aggregated transmission beam may be generated as:
  • M represents the number of transmission beams and Pj indicates the weight of transmission beam j.
  • Pj indicates the weight of transmission beam j.
  • the embodiments are limited to these examples.
  • FIG. 7 illustrates an example of a logic flow 700 that may be representative of the implementation of one or more of the disclosed hybrid open-loop and closed- loop beamforming techniques according to various embodiments.
  • logic flow 700 may be
  • mobile device 102 e.g., as a UE
  • base station 104 e.g., as an eNB
  • a beamforming entity can select a set of transmission beams to use for
  • the beamforming entity can select any number of transmission beams including, for example, M transmission beams.
  • the beamforming entity can use a different selected transmission beam to transmit a signal or group of signals.
  • the signal or group of signals can be transmitted across different frequencies (e.g., as shown in FIG. 5).
  • each of the transmission beams can be used to each transmit a corresponding signal or group of signals approximately simultaneously.
  • each transmission beam can transmit a RB.
  • the signal or group of signals corresponding to each transmission beam can be transmitted in succession across the same set of frequencies (e.g., as shown in FIG. 6). Under such a scenario, each transmission beam can be used to transmit a subframe containing a signal or group of signals.
  • the transmission beams can be reused or cycled through in a predefined order.
  • the signals transmitted can be data signals, control signals, reference signals (e.g., BRS) or can represent an entire RB or subframe of information.
  • the signals transmitted by the beamforming entity at step 204 can be received and processed by a remote entity. The remote entity can attempt to uncover or decode any information provided in the transmitted signals.
  • the beamforming entity can receive feedback from the remote device that received the transmitted signals.
  • the feedback can include information related to the transmissions.
  • the feedback can include feedback CSI measured from CRGs.
  • the CSI provided can include a wideband CQI, one or more codeword specific wideband CQIs, a subband CQI, and/or a wideband RI.
  • the feedback information does not include BI.
  • the CSI can include CQI and/or RI as measured from each transmitted symbol or group of signals.
  • the feedback information can include a BRS-RP report.
  • received power for any transmitted BRS can be provided.
  • direct feedback on a particular transmission beam such as BI may not be provided.
  • the feedback can provide the beamforming entity with information that can be used to adjust use of one or more transmission beams from the first set of transmission beams.
  • the beamforming entity can select a second set of transmission beams from the first set of transmission beams.
  • the second set of transmission beams can be a subset of the first set of transmission beams but is not so limited.
  • the beamforming entity can select the second set of transmission beams based on, for example, feedback information it receives from a remote entity (such as feedback information received at step 706).
  • the beamforming entity can select transmission beams that can provide higher performance in terms of received signal strength or likelihood of correct decoding, among other factors.
  • the beamforming entity can transmit signals or groups of signals using the second set of transmission beams.
  • the signals transmitted at 710 can be retransmissions of signals transmitted previously (e.g., at 704) for example based on a retransmission scheme (e.g., a HARQ scheme) or can be a next set of different signals which may be more likely to be received and correctly processed by a remote entity using the second set of transmission beams rather than the first set of transmission beams.
  • a retransmission scheme e.g., a HARQ scheme
  • the beamforming techniques described in relation to FIGs. 5-7 can provide improved efficiency over conventional closed-loop beamforming systems since the open- loop features of the techniques described herein reduce computation and signaling overhead by limiting the beam selection feedback from the remote entity to the beamforming entity.
  • FIG. 8 illustrates an embodiment of a storage medium 800 and an embodiment of a storage medium 850.
  • Storage media 800 and 850 may comprise any non-transitory computer-readable storage media or machine-readable storage media, such as an optical, magnetic or semiconductor storage media.
  • storage media 800 and 850 may comprise an article of manufacture.
  • storage media 800 and 850 may store computer-executable instructions, such as computer-executable instructions to implement logic flow 200 of FIG. 2 and logic flow 700 of FIG. 7, respectively.
  • Examples of a computer-readable storage medium or machine-readable storage medium may include any tangible media capable of storing electronic data, including volatile memory or non-volatile memory, removable or non-removable memory, erasable or non-erasable memory, writeable or re-writeable memory, and so forth.
  • Examples of computer-executable instructions may include any suitable type of code, such as source code, compiled code, interpreted code, executable code, static code, dynamic code, object-oriented code, visual code, and the like. The embodiments are not limited in this context.
  • circuitry may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group), and/or memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware
  • ASIC Application Specific Integrated Circuit
  • processor shared, dedicated, or group
  • memory shared, dedicated, or group
  • circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules.
  • circuitry may include logic, at least partially operable in hardware. Embodiments described herein may be implemented into a system using any suitably configured hardware and/or software.
  • FIG. 9 illustrates an example of a mobile device 900 that may be representative of a mobile device such as, for example, a UE that implements one or more of the disclosed techniques in various embodiments.
  • mobile device 900 may be representative of mobile device 102 according to some embodiments.
  • the mobile device 900 may include application circuitry 902, baseband circuitry 904, Radio Frequency (RF) circuitry 906, front-end module (FEM) circuitry 908 and one or more antennas 910, coupled together at least as shown.
  • RF Radio Frequency
  • FEM front-end module
  • the application circuitry 902 may include one or more application processors.
  • the application circuitry 902 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,
  • the processors may be coupled with and/or may include memory/storage and may be configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems to run on the system.
  • the baseband circuitry 904 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the baseband circuitry 904 may include one or more baseband processors and/or control logic to process baseband signals received from a receive signal path of the RF circuitry 906 and to generate baseband signals for a transmit signal path of the RF circuitry 906.
  • Baseband processing circuity 904 may interface with the application circuitry 902 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 906.
  • the baseband circuitry 904 may include a second generation (2G) baseband processor 904a, third generation (3G) baseband processor 904b, fourth generation (4G) baseband processor 904c, and/or other baseband processor(s) 904d for other existing generations, generations in development or to be developed in the future (e.g., fifth generation (5G), 6G, etc.).
  • the baseband circuitry 904 e.g., one or more of baseband processors 904a-d
  • 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 904 may include Fast-Fourier Transform (FFT), precoding, and/or constellation mapping/demapping functionality.
  • FFT Fast-Fourier Transform
  • encoding/decoding circuitry of the baseband circuitry 904 may include convolution, tail-biting convolution, turbo, Viterbi, and/or Low Density Parity Check (LDPC) encoder/decoder functionality.
  • LDPC Low Density Parity Check
  • the baseband circuitry 904 may include elements of a protocol stack such as, for example, elements of an evolved universal terrestrial radio access network
  • EUTRAN EUTRAN protocol including, for example, physical (PHY), media access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), and/or radio resource control (RRC) elements.
  • a central processing unit (CPU) 904e of the baseband circuitry 904 may be configured to run elements of the protocol stack for signaling of the PHY, MAC, RLC, PDCP and/or RRC layers.
  • the baseband circuitry may include one or more audio digital signal processor(s) (DSP) 904f.
  • the audio DSP(s) 904f 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.
  • some or all of the constituent components of the baseband circuitry 904 and the application circuitry 902 may be implemented together such as, for example, on a system on a chip (SOC).
  • SOC system on a chip
  • the baseband circuitry 904 may provide for
  • the baseband circuitry 904 may support communication with an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMAN), a wireless local area network (WLAN), a wireless personal area network (WPAN).
  • EUTRAN evolved universal terrestrial radio access network
  • WMAN wireless metropolitan area networks
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • multi-mode baseband circuitry communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.
  • RF circuitry 906 may enable communication with wireless networks
  • the RF circuitry 906 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • RF circuitry 906 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 908 and provide baseband signals to the baseband circuitry 904.
  • RF circuitry 906 may also include a transmit signal path which may include circuitry to up-convert baseband signals provided by the baseband circuitry 904 and provide RF output signals to the FEM circuitry 908 for transmission.
  • the RF circuitry 906 may include a receive signal path and a transmit signal path.
  • the receive signal path of the RF circuitry 906 may include mixer circuitry 906a, amplifier circuitry 906b and filter circuitry 906c.
  • the transmit signal path of the RF circuitry 906 may include filter circuitry 906c and mixer circuitry 906a.
  • RF circuitry 906 may also include synthesizer circuitry 906d for synthesizing a frequency for use by the mixer circuitry 906a of the receive signal path and the transmit signal path.
  • the mixer circuitry 906a of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 908 based on the synthesized frequency provided by synthesizer circuitry 906d.
  • the amplifier circuitry 906b may be configured to amplify the down-converted signals and the filter circuitry 906c 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.
  • LPF low-pass filter
  • BPF band-pass filter
  • Output baseband signals may be provided to the baseband circuitry 904 for further processing.
  • the output baseband signals may be zero-frequency baseband signals, although this is not a requirement.
  • mixer circuitry 906a of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry 906a of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 906d to generate RF output signals for the FEM circuitry 908.
  • the baseband signals may be provided by the baseband circuitry 904 and may be filtered by filter circuitry 906c.
  • the filter circuitry 906c may include a low-pass filter (LPF), although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry 906a of the receive signal path and the mixer circuitry 906a of the transmit signal path may include two or more mixers and may be arranged for quadrature downconversion and/or upconversion respectively.
  • the mixer circuitry 906a of the receive signal path and the mixer circuitry 906a of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., Hartley image rejection).
  • the mixer circuitry 906a of the receive signal path and the mixer circuitry 906a may be arranged for direct downconversion and/or direct upconversion, respectively.
  • the mixer circuitry 906a of the receive signal path and the mixer circuitry 906a of the transmit signal path may be configured for super-heterodyne operation.
  • 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.
  • the output baseband signals and the input baseband signals may be digital baseband signals.
  • the RF circuitry 906 may include analog-to-digital converter (ADC) and digital-to- analog converter (DAC) circuitry and the baseband circuitry 904 may include a digital baseband interface to communicate with the RF circuitry 906.
  • ADC analog-to-digital converter
  • DAC digital-to- analog converter
  • 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.
  • the synthesizer circuitry 906d 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.
  • synthesizer circuitry 906d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.
  • the synthesizer circuitry 906d may be configured to synthesize an output frequency for use by the mixer circuitry 906a of the RF circuitry 906 based on a frequency input and a divider control input. In some embodiments, the synthesizer circuitry 906d may be a fractional N/N+l synthesizer.
  • frequency input may be provided by a voltage controlled oscillator (VCO), although that is not a requirement.
  • VCO voltage controlled oscillator
  • Divider control input may be provided by either the baseband circuitry 904 or the applications processor 902 depending on the desired output frequency.
  • a divider control input (e.g., N) may be determined from a look-up table based on a channel indicated by the applications processor 902.
  • Synthesizer circuitry 906d of the RF circuitry 906 may include a divider, a delay-locked loop (DLL), a multiplexer and a phase accumulator.
  • the divider may be a dual modulus divider (DMD) and the phase accumulator may be a digital phase accumulator (DPA).
  • 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.
  • the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump and a D-type flip-flop.
  • 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.
  • Nd is the number of delay elements in the delay line.
  • synthesizer circuitry 906d 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.
  • the output frequency may be a LO frequency (fLO).
  • the RF circuitry 906 may include an IQ/polar converter.
  • FEM circuitry 908 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 910, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 906 for further processing.
  • FEM circuitry 908 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 906 for transmission by one or more of the one or more antennas 910.
  • the FEM circuitry 908 may include a TX/RX switch to switch between transmit mode and receive mode operation.
  • the FEM circuitry may include a receive signal path and a transmit signal path.
  • the receive signal path of the FEM circuitry may include a low-noise amplifier (LNA) to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 906).
  • the transmit signal path of the FEM circuitry 908 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 906), and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 910.
  • PA power amplifier
  • the mobile device 900 may include additional elements such as, for example, memory/storage, display, camera, sensor, and/or input/output (I/O) interface.
  • additional elements such as, for example, memory/storage, display, camera, sensor, and/or input/output (I/O) interface.
  • FIG. 10 illustrates an embodiment of a communications device 1000 that may implement one or more of mobile device 102, base station 104, logic flow 200, logic flow 700, storage medium 800, storage medium 850, and the mobile device 900.
  • device 1000 may comprise a logic circuit 1028.
  • the logic circuit 1028 may include physical circuits to perform operations described for one or more of mobile device 102, base station 104, logic flow 200, logic flow 700, and the mobile device 900 of FIG. 9 for example.
  • device 1000 may include a radio interface 1010, baseband circuitry 1020, and computing platform 1030, although the embodiments are not limited to this configuration.
  • the device 1000 may implement some or all of the structure and/or operations for one or more of mobile device 102, base station 104, logic flow 200, logic flow 700, storage medium 800, storage medium 850, the mobile device 900, and logic circuit 1028 in a single computing entity, such as entirely within a single device.
  • the device 1000 may distribute portions of the structure and/or operations for one or more of mobile device 102, base station 104, logic flow 200, logic flow 700, storage medium 800, storage medium 850, the mobile device 900, and logic circuit 1028 across multiple computing entities using a distributed system architecture, such as a client-server architecture, a 3-tier architecture, an N-tier architecture, a tightly-coupled or clustered architecture, a peer-to-peer architecture, a master-slave architecture, a shared database architecture, and other types of distributed systems.
  • a distributed system architecture such as a client-server architecture, a 3-tier architecture, an N-tier architecture, a tightly-coupled or clustered architecture, a peer-to-peer architecture, a master-slave architecture, a shared database architecture, and other types of distributed systems.
  • a distributed system architecture such as a client-server architecture, a 3-tier architecture, an N-tier architecture, a tightly-coupled or clustered architecture, a peer-to-peer architecture, a
  • radio interface 1010 may include a component or combination of components adapted for transmitting and/or receiving single-carrier or multi-carrier modulated signals (e.g., including complementary code keying (CCK), orthogonal frequency division multiplexing (OFDM), and/or single-carrier frequency division multiple access (SC-FDMA) symbols) although the embodiments are not limited to any specific over-the-air interface or modulation scheme.
  • Radio interface 1010 may include, for example, a receiver 1012, a frequency synthesizer 1014, and/or a transmitter 1016.
  • Radio interface 1010 may include bias controls, a crystal oscillator and/or one or more antennas 1018-/.
  • radio interface 1010 may use external voltage-controlled oscillators (VCOs), surface acoustic wave filters, intermediate frequency (IF) filters and/or RF filters, as desired. Due to the variety of potential RF interface designs an expansive description thereof is omitted.
  • VCOs voltage-controlled oscillators
  • IF intermediate frequency
  • Baseband circuitry 1020 may communicate with radio interface 1010 to process receive and/or transmit signals and may include, for example, a mixer for down-converting received RF signals, an analog-to-digital converter 1022 for converting analog signals to digital form, a digital-to- analog converter 1024 for converting digital signals to analog form, and a mixer for up-converting signals for transmission. Further, baseband circuitry 1020 may include a baseband or physical layer (PHY) processing circuit 1026 for PHY link layer processing of respective receive/transmit signals. Baseband circuitry 1020 may include, for example, a medium access control (MAC) processing circuit 1027 for MAC/data link layer processing. Baseband circuitry 1020 may include a memory controller 1032 for communicating with MAC processing circuit 1027 and/or a computing platform 1030, for example, via one or more interfaces 1034.
  • PHY physical layer
  • PHY processing circuit 1026 may include a frame construction and/or detection module, in combination with additional circuitry such as a buffer memory, to construct and/or deconstruct communication frames.
  • MAC processing circuit 1027 may share processing for certain of these functions or perform these processes independent of PHY processing circuit 1026.
  • MAC and PHY processing may be integrated into a single circuit.
  • the computing platform 1030 may provide computing functionality for the device 1000. As shown, the computing platform 1030 may include a processing component 1040. In addition to, or alternatively of, the baseband circuitry 1020, the device 1000 may execute processing operations or logic for one or more of mobile device 102, base station 104, logic flow 200, logic flow 700, storage medium 800, storage medium 850, the mobile device 900, and logic circuit 1028 using the processing component 1040.
  • the processing component 1040 (and/or PHY 1026 and/or MAC 1027) may comprise various hardware elements, software elements, or a combination of both.
  • Examples of hardware elements may include devices, logic devices, components, processors, microprocessors, circuits, processor circuits, circuit elements (e.g., transistors, resistors, capacitors, inductors, and so forth), integrated circuits, application specific integrated circuits (ASIC), programmable logic devices (PLD), digital signal processors (DSP), field programmable gate array (FPGA), memory units, logic gates, registers, semiconductor device, chips, microchips, chip sets, and so forth.
  • ASIC application specific integrated circuits
  • PLD programmable logic devices
  • DSP digital signal processors
  • FPGA field programmable gate array
  • Examples of software elements may include software components, programs, applications, computer programs, application programs, system programs, software development programs, machine programs, operating system software, middleware, firmware, software modules, routines, subroutines, functions, methods, procedures, software interfaces, application program interfaces (API), instruction sets, computing code, computer code, code segments, computer code segments, words, values, symbols, or any combination thereof. Determining whether an embodiment is implemented using hardware elements and/or software elements may vary in accordance with any number of factors, such as desired computational rate, power levels, heat tolerances, processing cycle budget, input data rates, output data rates, memory resources, data bus speeds and other design or performance constraints, as desired for a given implementation.
  • the computing platform 1030 may further include other platform components 1050.
  • Other platform components 1050 include common computing elements, such as one or more processors, multi-core processors, co-processors, memory units, chipsets, controllers, peripherals, interfaces, oscillators, timing devices, video cards, audio cards, multimedia input/output (I/O) components (e.g., digital displays), power supplies, and so forth.
  • Examples of memory units may include without limitation various types of computer readable and machine readable storage media in the form of one or more higher speed memory units, such as read-only memory (ROM), random-access memory (RAM), dynamic RAM (DRAM), Double-Data-Rate DRAM (DDRAM), synchronous DRAM (SDRAM), static RAM (SRAM), programmable ROM (PROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), flash memory, polymer memory such as ferroelectric polymer memory, ovonic memory, phase change or ferroelectric memory, silicon-oxide-nitride-oxide-silicon (SONOS) memory, magnetic or optical cards, an array of devices such as Redundant Array of Independent Disks (RAID) drives, solid state memory devices (e.g., USB memory, solid state drives (SSD) and any other type of storage media suitable for storing information.
  • ROM read-only memory
  • RAM random-access memory
  • DRAM dynamic RAM
  • DDRAM Double
  • Device 1000 may be, for example, an ultra-mobile device, a mobile device, a fixed device, a machine-to-machine (M2M) device, a personal digital assistant (PDA), a mobile computing device, a smart phone, a telephone, a digital telephone, a cellular telephone, user equipment, eBook readers, a handset, a one-way pager, a two-way pager, a messaging device, a computer, a personal computer (PC), a desktop computer, a laptop computer, a notebook computer, a netbook computer, a handheld computer, a tablet computer, a server, a server array or server farm, a web server, a network server, an Internet server, a work station, a mini-computer, a main frame computer, a supercomputer, a network appliance, a web appliance, a distributed computing system, multiprocessor systems, processor-based systems, consumer electronics, programmable consumer electronics, game devices, display, television, digital television, set top box, wireless access point, base station, node B
  • Embodiments of device 1000 may be implemented using single input single output (SISO) architectures. However, certain implementations may include multiple antennas (e.g., antennas 1018- ) for transmission and/or reception using adaptive antenna techniques for beamforming or spatial division multiple access (SDMA) and/or using MIMO communication techniques.
  • SISO single input single output
  • certain implementations may include multiple antennas (e.g., antennas 1018- ) for transmission and/or reception using adaptive antenna techniques for beamforming or spatial division multiple access (SDMA) and/or using MIMO communication techniques.
  • SDMA spatial division multiple access
  • device 1000 may be implemented using any combination of discrete circuitry, application specific integrated circuits (ASICs), logic gates and/or single chip architectures. Further, the features of device 1000 may be implemented using ASICs, logic gates and/or single chip architectures. Further, the features of device 1000 may be implemented using ASICs, logic gates and/or single chip architectures. Further, the features of device 1000 may be implemented using ASICs, logic gates and/or single chip architectures. Further, the features of device 1000 may be implemented using ASICs, logic gates and/or single chip architectures. Further, the features of device 1000 may be implemented using any combination of discrete circuitry, application specific integrated circuits (ASICs), logic gates and/or single chip architectures. Further, the features of device 1000 may be implemented using ASICs, logic gates and/or single chip architectures. Further, the features of device 1000 may be implemented using ASICs, logic gates and/or single chip architectures. Further, the features of device 1000 may be implemented using ASICs, logic gates and/or single chip architectures. Further, the features of device
  • microcontrollers programmable logic arrays and/or microprocessors or any combination of the foregoing where suitably appropriate. It is noted that hardware, firmware and/or software elements may be collectively or individually referred to herein as “logic” or “circuit.”
  • FIG. 10 may represent one functionally descriptive example of many potential implementations. Accordingly, division, omission or inclusion of block functions depicted in the accompanying figures does not infer that the hardware components, circuits, software and/or elements for implementing these functions would be necessarily be divided, omitted, or included in embodiments.
  • FIG. 11 illustrates an embodiment of a broadband wireless access system 1100. As shown in FIG. 11, broadband wireless access system 1100 may be an internet protocol (IP) type network comprising an internet 1110 type network or the like that is capable of supporting mobile wireless access and/or fixed wireless access to internet 1110.
  • IP internet protocol
  • broadband wireless access system 1100 may comprise any type of orthogonal frequency division multiple access (OFDMA)-based or single-carrier frequency division multiple access (SC-FDMA)-based wireless network, such as a system compliant with one or more of the 3GPP LTE Specifications and/or IEEE 802.16 Standards, and the scope of the claimed subject matter is not limited in these respects.
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • radio access networks In the exemplary broadband wireless access system 1100, radio access networks (RANs)
  • RANs radio access networks
  • 1112 and 1118 are capable of coupling with evolved node Bs or base stations (eNBs) 1114 and 1120, respectively, to provide wireless communication between one or more fixed devices 1116 and internet 1110 and/or between or one or more mobile devices 1122 and Internet 1110.
  • eNBs evolved node Bs or base stations
  • One example of a fixed device 1116 and a mobile device 1122 is device 1000 of FIG. 10, with the fixed device 1116 comprising a stationary version of device 1000 and the mobile device 1122 comprising a mobile version of device 1000.
  • RANs 1112 and 1118 may implement profiles that are capable of defining the mapping of network functions to one or more physical entities on broadband wireless access system 1100.
  • eNBs 1114 and 1120 may comprise radio equipment to provide RF communication with fixed device 1116 and/or mobile device 1122, such as described with reference to device 1000, and may comprise, for example, the PHY and MAC layer equipment in compliance with a 3GPP LTE Specification or an IEEE 802.16 Standard.
  • Base stations or eNBs 1114 and 1120 may further comprise an IP backplane to couple to Internet 1110 via RANs 1112 and 1118, respectively, although the scope of the claimed subject matter is not limited in these respects.
  • Broadband wireless access system 1100 may further comprise a visited core network (CN)
  • CN visited core network
  • a home CN 1126 each of which may be capable of providing one or more network functions including but not limited to proxy and/or relay type functions, for example
  • AAA authentication, authorization and accounting
  • DHCP dynamic host configuration protocol
  • IP internet protocol
  • PSTN public switched telephone network
  • VoIP voice over internet protocol
  • IP internet protocol
  • Visited CN 1124 may be referred to as a visited CN in the case where visited CN 1124 is not part of the regular service provider of fixed device 1116 or mobile device 1122, for example where fixed device 1116 or mobile device 1122 is roaming away from its respective home CN 1126, or where broadband wireless access system 1100 is part of the regular service provider of fixed device 1116 or mobile device 1122 but where broadband wireless access system 1100 may be in another location or state that is not the main or home location of fixed device 1116 or mobile device 1122.
  • the embodiments are not limited in this context.
  • Fixed device 1116 may be located anywhere within range of one or both of base stations or eNBs 1114 and 1120, such as in or near a home or business to provide home or business customer broadband access to Internet 1110 via base stations or eNBs 1114 and 1120 and RANs 1112 and 1118, respectively, and home CN 1126. It is worthy of note that although fixed device 1116 is generally disposed in a stationary location, it may be moved to different locations as needed. Mobile device 1122 may be utilized at one or more locations if mobile device 1122 is within range of one or both of base stations or eNBs 1114 and 1120, for example.
  • operation support system (OSS) 1128 may be part of broadband wireless access system 1100 to provide management functions for broadband wireless access system 1100 and to provide interfaces between functional entities of broadband wireless access system 1100.
  • Broadband wireless access system 1100 of FIG. 11 is merely one type of wireless network showing a certain number of the components of broadband wireless access system 1100, and the scope of the claimed subject matter is not limited in these respects.
  • Various embodiments may be implemented using hardware elements, software elements, or a combination of both.
  • hardware elements may include processors,
  • microprocessors circuits, circuit elements (e.g., transistors, resistors, capacitors, inductors, and so forth), integrated circuits, application specific integrated circuits (ASIC), programmable logic devices (PLD), digital signal processors (DSP), field programmable gate array (FPGA), logic gates, registers, semiconductor device, chips, microchips, chip sets, and so forth.
  • ASIC application specific integrated circuits
  • PLD programmable logic devices
  • DSP digital signal processors
  • FPGA field programmable gate array
  • Examples of software may include software components, programs, applications, computer programs, application programs, system programs, machine programs, operating system software, middleware, firmware, software modules, routines, subroutines, functions, methods, procedures, software interfaces, application program interfaces (API), instruction sets, computing code, computer code, code segments, computer code segments, words, values, symbols, or any combination thereof.
  • API application program interfaces
  • Determining whether an embodiment is implemented using hardware elements and/or software elements may vary in accordance with any number of factors, such as desired computational rate, power levels, heat tolerances, processing cycle budget, input data rates, output data rates, memory resources, data bus speeds and other design or performance constraints.
  • One or more aspects of at least one embodiment may be implemented by representative instructions stored on a machine-readable medium which represents various logic within the processor, which when read by a machine causes the machine to fabricate logic to perform the techniques described herein.
  • Such representations known as "IP cores" may be stored on a tangible, machine readable medium and supplied to various customers or manufacturing facilities to load into the fabrication machines that actually make the logic or processor.
  • Some embodiments may be implemented, for example, using a machine -readable medium or article which may store an instruction or a set of instructions that, if executed by a machine, may cause the machine to perform a method and/or operations in accordance with the embodiments.
  • a machine may include, for example, any suitable processing platform, computing platform, computing device, processing device, computing system, processing system, computer, processor, or the like, and may be implemented using any suitable combination of hardware and/or software.
  • the machine-readable medium or article may include, for example, any suitable type of memory unit, memory device, memory article, memory medium, storage device, storage article, storage medium and/or storage unit, for example, memory, removable or nonremovable media, erasable or non-erasable media, writeable or re-writeable media, digital or analog media, hard disk, floppy disk, Compact Disk Read Only Memory (CD-ROM), Compact Disk Recordable (CD-R), Compact Disk Rewriteable (CD-RW), optical disk, magnetic media, magneto-optical media, removable memory cards or disks, various types of Digital Versatile Disk (DVD), a tape, a cassette, or the like.
  • any suitable type of memory unit for example, any suitable type of memory unit, memory device, memory article, memory medium, storage device, storage article, storage medium and/or storage unit, for example, memory, removable or nonremovable media, erasable or non-erasable media, writeable or re-writeable media, digital or analog media, hard disk,
  • the instructions may include any suitable type of code, such as source code, compiled code, interpreted code, executable code, static code, dynamic code, encrypted code, and the like, implemented using any suitable high-level, low- level, object-oriented, visual, compiled and/or interpreted programming language.
  • Example 1 is an apparatus, comprising a memory and logic, at least a portion of the logic implemented in circuitry coupled to the memory, the logic to generate a set of reference signals for transmission by a set of candidate transmission beams, process a first indication identifying a first set of transmission beams, generate a group of data signals for transmission by the first set of transmission beams, process a second indication identifying a second set of transmission beams and specify one or more data signals for retransmission by the second set of transmission beams.
  • Example 2 is an extension of Example 1 or any other example disclosed herein, the logic further comprising transmission logic to transmit the set of reference signals periodically.
  • Example 3 is an extension of Example 1 or any other example disclosed herein, the logic further comprising transmission logic to transmit each reference signal using a corresponding candidate transmission beam.
  • Example 4 is an extension of Example 1 or any other example disclosed herein, each transmission beam within the set of candidate transmission beams identified by a transmission beam identifier.
  • Example 5 is an extension of Example 4 or any other example disclosed herein, the transmission beam identifier for each transmission beam within the set of candidate transmission beams predefined.
  • Example 6 is an extension of Example 4 or any other example disclosed herein, the first indication to comprise one or more transmission beam identifiers.
  • Example 7 is an extension of Example 1 or any other example disclosed herein, the first set of transmission beams to comprise a subset of the set of candidate transmission beams.
  • Example 8 is an extension of Example 1 or any other example disclosed herein, the data signals to comprise one or more codeblocks.
  • Example 9 is an extension of Example 3 or any other example disclosed herein, the transmission logic to sequentially transmit each data signal using a corresponding transmission beam from the first set of transmission beams.
  • Example 10 is an extension of Example 9 or any other example disclosed herein, the transmission beams from the first set of transmission beams cyclically used to transmit the group of data signals.
  • Example 11 is an extension of Example 10 or any other example disclosed herein, the second indication to comprise a field specifying one or more positions within a transmission order of the cyclically used first set of transmission beams.
  • Example 12 is an extension of Example 1 or any other example disclosed herein, the second set of transmission beams to comprise a subset of the first set of transmission beams.
  • Example 13 is an extension of Example 12 or any other example disclosed herein, the second set of transmission beams to comprise transmission beams corresponding to successfully decoded data signals transmitted by the first set of transmission beams.
  • Example 14 is an extension of Example 1 or any other example disclosed herein, the logic further comprising transmission logic to sequentially retransmit each of the one or more data signals specified for retransmission using a corresponding transmission beam from the second set of transmission beams.
  • Example 15 is an extension of Example 1 or any other example disclosed herein, the one or more data signals specified for retransmission to comprise at least one unsuccessfully decoded data signal transmitted by a transmission beam from the first set of transmission beams.
  • Example 16 is a mobile device according to any of Examples 1 to 15 or any other example disclosed herein and at least one radio frequency (RF) transceiver.
  • RF radio frequency
  • Example 17 is a base station according to any of Examples 1 to 15 or any other example disclosed herein and at least one radio frequency (RF) transceiver.
  • RF radio frequency
  • Example 18 is a wireless communication method, comprising generating one or more reference signals for transmission by a set of candidate transmission beams, processing a first indication identifying a first set of preferred transmission beams, generating one or more data signals for transmission by the first set of preferred transmission beams, processing a second indication identifying a second set of preferred transmission beams, and selecting one or more of the data signals for retransmission by the second set of preferred transmission beams.
  • Example 19 is an extension of Example 18 or any other example disclosed herein, comprising generating the one or more reference signals for periodic transmission.
  • Example 20 is an extension of Example 18 or any other example disclosed herein, transmitting each reference signal using a corresponding candidate transmission beam.
  • Example 21 is an extension of Example 18 or any other example disclosed herein, identifying each transmission beam within the set of candidate transmission beams by a transmission beam identifier.
  • Example 22 is an extension of Example 21 or any other example disclosed herein, predefining the transmission beam identifier for each transmission beam within the set of candidate transmission beams.
  • Example 23 is an extension of Example 21 or any other example disclosed herein, the first indication to comprise one or more transmission beam identifiers.
  • Example 24 is an extension of Example 18 or any other example disclosed herein, the first set of preferred transmission beams to comprise a subset of the set of candidate transmission beams.
  • Example 25 is an extension of Example 18 or any other example disclosed herein, each data signal to comprise one or more codeblocks.
  • Example 26 is an extension of Example 25 or any other example disclosed herein, sequentially transmitting each of the one or more data signals using a corresponding transmission beam from the first set of transmission beams.
  • Example 27 is an extension of Example 26 or any other example disclosed herein, cyclically using the transmission beams from the first set of transmission beams to transmit the one or more data signals.
  • Example 28 is an extension of Example 27 or any other example disclosed herein, the second indication to comprise a field specifying one or more positions within a transmission order of the cyclically used first set of transmission beams.
  • Example 29 is an extension of Example 18 or any other example disclosed herein, the second set of transmission beams to comprise a subset of the first set of transmission beams.
  • Example 30 is an extension of Example 29 or any other example disclosed herein, the second set of transmission beams to comprise transmission beams corresponding to successfully decoded data signals transmitted by the first set of transmission beams.
  • Example 31 is an extension of Example 18 or any other example disclosed herein, sequentially retransmitting each data signal within a group of retransmitted data signals using a corresponding transmission beam from the second set of transmission beams.
  • Example 32 is an extension of Example 31 or any other example disclosed herein, the group of retransmitted data signals to comprise at least one unsuccessfully decoded data signal transmitted by a transmission beam from the first set of transmission beams.
  • Example 33 is at least one non-transitory computer-readable storage medium comprising a set of instructions that, in response to being executed on a computing device, cause the computing device to perform a wireless communication method according to any of Examples 18 to 32 or any other example disclosed herein.
  • Example 34 is an apparatus comprising means for performing a wireless communication method according to any of Examples 18 to 32 or any other example disclosed herein.
  • Example 35 is at least one non-transitory computer-readable storage medium comprising a set of wireless communication instructions that, in response to being executed on a computing device, cause the computing device to generate one or more reference signals for transmission with a set of candidate transmission beams, process an identification of a first set of preferred transmission beams, generate one or more data signals for transmission with the first set of preferred transmission beams, process an identification of a second set of preferred transmission beams, and designate a subset of the data signals for retransmission with the second set of preferred transmission beams.
  • Example 36 is an extension of Example 35 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to generate the one or more reference signals periodically for transmission.
  • Example 37 is an extension of Example 35 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to specify each reference signal for transmission using a corresponding candidate transmission beam.
  • Example 38 is an extension of Example 35 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to associate each transmission beam within the set of candidate transmission beams to a predefined transmission beam identifier.
  • Example 39 is an extension of Example 38 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to determine the identification of the first set of preferred transmission beams based on an indication comprising one or more transmission beam identifiers.
  • Example 40 is an extension of Example 35 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to specify each data signal for sequential transmission using a corresponding transmission beam from the first set of preferred
  • Example 41 is an extension of Example 40 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to specify cyclically using the transmission beams from the first set of preferred transmission beams for transmission of the one or more data signals.
  • Example 42 is an extension of Example 41 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to determine the identification of the second set of preferred transmission beams based on a transmission order of the cyclically used first set of preferred transmission beams.
  • Example 43 is an extension of Example 35 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to specify the subset of data signals for sequential retransmission using a corresponding transmission beam from the second set of preferred transmission beams.
  • Example 44 is an apparatus, comprising a memory and logic, at least a portion of the logic implemented in circuitry coupled to the memory, the logic to generate one or more first signals for transmission by a first set of transmission beams, process feedback information related to the one or more first signals, select a second set of transmission beams based on the feedback information, and specify one or more second signals for transmission by the second set of transmission beams.
  • Example 45 is an extension of Example 44 or any other example disclosed herein, the logic further comprising transmission logic to transmit the one or more first signals sequentially.
  • Example 46 is an extension of Example 44 or any other example disclosed herein, the logic further comprising transmission logic to transmit the one or more first signals approximately simultaneously over approximately separate frequency bands.
  • Example 47 is an extension of Example 44 or any other example disclosed herein, each of the one or more first signals to comprise one of a data signal, a control signal, and a reference signal.
  • Example 48 is an extension of Example 44 or any other example disclosed herein, the logic further comprising transmission logic to cyclically use the first set of transmission beams to transmit the one or more first signals.
  • Example 49 is an extension of Example 44 or any other example disclosed herein, the feedback information to comprise one or more of a wideband channel quality indicator (CQI), a codeword- specific CQI, a wideband CQI, a wideband rank indicator (RI), and a received power.
  • CQI wideband channel quality indicator
  • RI wideband rank indicator
  • Example 50 is an extension of Example 44 or any other example disclosed herein, the second set of transmission beams to comprise a subset of the first set of transmission beams.
  • Example 51 is an extension of Example 44 or any other example disclosed herein, the logic further comprising transmission logic to transmit the one or more second signals sequentially.
  • Example 52 is an extension of Example 44 or any other example disclosed herein, the logic further comprising transmission logic to transmit the one or more second signals approximately simultaneously over approximately separate frequency bands.
  • Example 53 is an extension of Example 44 or any other example disclosed herein, each of the one or more second signals to comprise one of a data signal, a control signal, and a reference signal.
  • Example 54 is an extension of Example 44 or any other example disclosed herein, the logic further comprising transmission logic to cyclically use the second set of transmission beams to transmit the one or more second signals.
  • Example 55 is an extension of Example 44 or any other example disclosed herein, the one or more second signals distinct from the one or more first signals.
  • Example 56 is a mobile device according to any of Examples 44 to 55 or any other example disclosed herein and at least one radio frequency (RF) transceiver.
  • Example 57 is a base station according to any of Examples 44 to 55 or any other example disclosed herein and at least one radio frequency (RF) transceiver.
  • RF radio frequency
  • Example 58 is a wireless communication method, comprising generating one or more first signals for transmission by a first set of transmission beams, processing feedback information related to the one or more first signals, selecting a second set of transmission beams based on the feedback information, and specifying one or more second signals for transmission by the second set of transmission beams.
  • Example 59 is an extension of Example 58 or any other example disclosed herein, the logic further comprising transmission logic to transmit the one or more first signals sequentially.
  • Example 60 is an extension of Example 58 or any other example disclosed herein, the logic further comprising transmission logic to transmit the one or more first signals approximately simultaneously over approximately separate frequency bands.
  • Example 61 is an extension of Example 58 or any other example disclosed herein, the logic further comprising transmission logic to cyclically use the first set of transmission beams to transmit the one or more first signals.
  • Example 62 is an extension of Example 58 or any other example disclosed herein, the logic further comprising transmission logic to transmit the one or more second signals sequentially.
  • Example 63 is an extension of Example 58 or any other example disclosed herein, the logic further comprising transmission logic to transmit the one or more second signals approximately simultaneously over approximately separate frequency bands.
  • Example 64 is an extension of Example 58 or any other example disclosed herein, the logic further comprising transmission logic to cyclically use the second set of transmission beams to transmit the one or more second signals.
  • Example 65 is at least one non-transitory computer-readable storage medium comprising a set of instructions that, in response to being executed on a computing device, cause the computing device to perform a wireless communication method according to any of Examples 58 to 64 or any other example disclosed herein.
  • Example 66 is an apparatus comprising means for performing a wireless communication method according to any of Examples 58 to 64 or any other example disclosed herein.
  • Example 67 is at least one non-transitory computer-readable storage medium comprising a set of wireless communication instructions that, in response to being executed on a computing device, cause the computing device to generate one or more first signals for transmission by a first set of transmission beams, process feedback information related to the one or more first signals, select a second set of transmission beams based on the feedback information, and specify one or more second signals for transmission by the second set of transmission beams.
  • Example 68 is an extension of Example 67 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to specify sequential transmission of the one or more first signals.
  • Example 69 is an extension of Example 67 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to specify transmission of the one or more first signals approximately simultaneously over approximately separate frequency bands.
  • Example 70 is an extension of Example 67 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to specify cyclically using the first set of transmission beams to transmit the one or more first signals.
  • Example 71 is an extension of Example 67 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to receive the feedback information comprising one or more of a wideband channel quality indicator (CQI), a codeword- specific CQI, a wideband CQI, a wideband rank indicator (RI), and a received power.
  • CQI wideband channel quality indicator
  • RI wideband rank indicator
  • Example 72 is an extension of Example 67 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to specify sequential transmission of the one or more second signals.
  • Example 73 is an extension of Example 67 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to specify transmission of the one or more second signals approximately simultaneously over approximately separate frequency bands.
  • Example 74 is an extension of Example 67 or any other example disclosed herein, comprising wireless communication instructions that, in response to being executed on the computing device, cause the computing device to specify cyclically using the second set of transmission beams to transmit the one or more second signals.
  • any computer-readable storage medium can be transitory or non- transitory.
  • Coupled and “connected” along with their derivatives. These terms are not intended as synonyms for each other. For example, some embodiments may be described using the terms “connected” and/or “coupled” to indicate that two or more elements are in direct physical or electrical contact with each other. The term “coupled,” however, may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other.
  • computing refers to the action and/or processes of a computer or computing system, or similar electronic computing device, that manipulates and/or transforms data represented as physical quantities (e.g., electronic) within the computing system' s registers and/or memories into other data similarly represented as physical quantities within the computing system's memories, registers or other such information storage, transmission or display devices.
  • physical quantities e.g., electronic
  • the embodiments are not limited in this context.

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Abstract

L'invention concerne des techniques de formation de faisceau hybride en boucle ouverte et/ou en boucle fermée. Une entité de formation de faisceau peut émettre des signaux de référence à une entité distante à l'aide d'un ensemble de faisceaux d'émission candidats. L'entité distante peut fournir une première indication à l'entité de formation de faisceau identifiant un premier ensemble de faisceaux d'émission préférés en fonction de signaux de référence reçus. Le premier ensemble de faisceaux d'émission préférés peut être un sous-ensemble de l'ensemble de faisceaux d'émission candidats. L'entité de formation de faisceau peut émettre des signaux de données à l'aide du premier ensemble de faisceaux d'émission préférés. En fonction du décodage des signaux de données, le dispositif distant peut fournir une seconde indication à l'entité de formation de faisceau identifiant un second ensemble de faisceaux d'émission préférés. Le second ensemble de faisceaux d'émission préférés peut être un sous-ensemble du premier ensemble de faisceaux d'émission préférés. L'entité de formation de faisceau peut réémettre certains signaux de données précédemment émis à l'aide du second ensemble de faisceaux d'émission préférés.
PCT/US2016/025701 2016-04-01 2016-04-01 Formation de faisceau hybride en boucle ouverte et en boucle fermée WO2017171867A1 (fr)

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