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WO2017147513A1 - Détection de transmission de transmissions en liaison montante non planifiées - Google Patents

Détection de transmission de transmissions en liaison montante non planifiées Download PDF

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Publication number
WO2017147513A1
WO2017147513A1 PCT/US2017/019487 US2017019487W WO2017147513A1 WO 2017147513 A1 WO2017147513 A1 WO 2017147513A1 US 2017019487 W US2017019487 W US 2017019487W WO 2017147513 A1 WO2017147513 A1 WO 2017147513A1
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WO
WIPO (PCT)
Prior art keywords
dmrs
identity
transmitted
enb
select
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2017/019487
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English (en)
Inventor
Qiaoyang Ye
Abhijeet Bhorkar
Fatemeh HAMIDI-SEPEHR
Huaning Niu
Hwan-Joon Kwon
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Intel IP Corp
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Intel IP Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Intel IP Corp filed Critical Intel IP Corp
Priority to HK19100726.0A priority Critical patent/HK1258356B/xx
Priority to CN201780008250.1A priority patent/CN108604967B/zh
Publication of WO2017147513A1 publication Critical patent/WO2017147513A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Definitions

  • Embodiments described herein relate generally to wireless networks and communications systems. Some embodiments relate to cellular communication networks including 3 GPP (Third Generation Partnership Project) networks, 3GPP LTE (Long Term Evolution) networks, and 3GPP LTE-A (LTE Advanced) networks, MulteFireTM (MF) networks, and 5G networks, although the scope of the embodiments is not limited in this respect. Some embodiments relate to an evolved NodeB (eNB) identifying user equipment (UE) that has transmitted data to the eNB over unlicensed spectrum based upon how the UE generates a DeModulation reference signal (DMRS). Other embodiments relate to the LIE generating the DMRS to indicate the origin and presence of data transmissions.
  • 3 GPP Three Generation Partnership Project
  • 3GPP LTE Long Term Evolution
  • 3GPP LTE-A Long Term Evolution Advanced
  • MF MulteFireTM
  • 5G networks although the scope of the embodiments is not limited in this respect.
  • Some embodiments relate to an evolved NodeB (eNB
  • enhanced Licensed- Assisted Access which expands the system bandwidth by utilizing the flexible carrier aggregation (CA) framework introduced by the LTE-Advanced where a primary component carrier (termed the primary cell or PCell) is operated in licensed spectrum and one or secondary component carriers (termed secondary cells or SCells) are operated in unlicensed spectrum.
  • CA flexible carrier aggregation
  • Another approach is a standalone LTE system in the unlicensed spectrum, where LTE-based technology solely operates in unlicensed spectrum without requiring an "anchor" in licensed spectrum. This is an MF system ,
  • MF and eLAA systems require signal structures and signaling techniques different from those of legacy LTE systems.
  • the non-exclusive nature of unlicensed spectrum requires a mechanism for eLAA/MF systems to fairly share the wireless medium with other systems including those operating with other technologies such as Wi- Fi.
  • eLAA/MF incorporate a LBT procedure where radio transmitters first sense the medium and transmit only if the medium is sensed to be idle.
  • the LBT procedure can cause performance issues. For example, in eLAA and MF systems, the uplink (UL) throughput performance can be noticeably degraded. One cause of this degradation is due to the inefficiency of operating a scheduled system in unlicensed spectrum.
  • the UL grant transmission requires a completion of multiple LBT procedures. For example, a LBT procedure occurs at the evolved NodeB (e ' NB) on the component carrier over which physical downlink control channel (PDCCFf) scheduling a physical uplink shared channel (PUSCH) transmission or a physical uplink control channel (PUCCH) (e.g., enhanced PUCCH (ePUCCH) in MF systems) is expected.
  • PDCFf physical downlink control channel
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • the scheduled UE Upon the reception of the UL grant carried in the PDCCH, the scheduled UE also performs an LBT before transmission.
  • the at least four subframe latency between UL grant and the corresponding PUSCH/PUCCH transmission can also attribute to the UL performance issue,
  • One way to reduce these performance issues is to allow UEs to transmit data on the PUSCH without requiring the UE to receive a UL grant.
  • the present disclosure relates to procedures for allowing a UE to identify itself and the presence of the grantless transmissions to an eNB when the UE transmits data in an unscheduled, grantless mode.
  • the UE may generate a DeModulation Reference Signal (DMRS) in such a way that once the eNB detects the DMRS, the eNB can identify the UE that sent both the DMRS and related data symbols.
  • DMRS DeModulation Reference Signal
  • FIG. 1 is a block diagram of a system including an evolved node B (eNB) and a user equipment (UE) that may operate in a wireless
  • FIG. 2 illustrates an example timing diagram of a non-scheduled, grantless UE transmission on unlicensed spectrum that identifies the UE according to some embodiments.
  • FIG. 3 illustrates an interlaced structure for uplink transmissions according to some embodiments.
  • FIG. 4 is a block diagram of a User Equipment (UE) in accordance with some embodiments.
  • UE User Equipment
  • FIG. 5 illustrates a block diagram of a communication device such as an eNB or a UE, in accordance with some embodiments.
  • a mobile terminal In Long Term Evolution (LTE) systems, a mobile terminal (referred to as a User Equipment or UE) connects to the cellular network via a base station (referred to as an evolved Node B or eNB). LTE systems usually utilize licensed spectrum for both uplink (UL) and downlink (DL) transmissions between a UE and an eNB.
  • Fig. 1 illustrates an example of the components of a UE 120 and a base station or eNB 100.
  • the eNB 100 includes processing circuitry 101 connected to a radio transceiver 102 for providing an air interface.
  • the UE 120 includes processing circuitry 121 connected to a radio transceiver 122 for providing an air interface over the wireless medium.
  • Each of the transceivers in the devices is connected to antennas 150.
  • the UE 120 may transmit data to the eNB 100 using unlicensed spectrum.
  • the UE 120 may use a MF system to transmit data over the PUSCH to the eNB 100.
  • the UE 120 does not request or receive a UL grant from the eNB 100 before transmitting data on the PUSCH.
  • the UL grant provides a time and resources that the UE 20 uses to transmit data to the eNB 100.
  • the eNB 100 knows what UE 120 is transmitting to the eNB 100 based upon the time and resources specified in the UL grant.
  • the eNB 100 When the UE 120 transmits without a UL grant, in a nonscheduled, grantless mode, the eNB 100 is unaware that a UE 120 is transmitting data. The eNB 100, therefore, needs a way to identify both a data transmission is occurring and the UE 120 that is transmitting data. In addition, the eNB 100 needs a way to determine when a UL burst has started.
  • the DMRS is generated by the transmitting UE 120 in a way that identifies the UE 120. Upon detecting the DMRS, the eNB 100 is able to identify the UE 120 and may infer a UL burst has started.
  • the DMRS may also be used by the eNB to identify the number of carriers the UE is using for the UL burst transmission. After the eNB successfully detects a DMRS on multiple carriers, where each DMRS identifies the same UE, the eNB may determine the number of carriers being used by the UE.
  • FIG. 2 illustrates an example timing diagram 200 of a non-scheduled, grantless UE transmission on unlicensed spectrum that identifies the UE according to some embodiments.
  • an eNB 202 uses downlink signaling to provide a UE 204 with a UE identity 210.
  • the UE identity uniquely identifies each UE that is communicating with the eNB 202.
  • the eNB 202 may keep a mapping between the UE identity and the
  • the eNB 202 may map the UE identity to another identifier that uniquely identifies the UE within the system or between two or more eNBs.
  • the eNB 202 may use a radio network temporary identifier (RNTI) such as a cell RNTI (C-RNTI) as the UE identity.
  • RNTI radio network temporary identifier
  • C-RNTI cell RNTI
  • the UE identity may be set by the UE rather than the eNB.
  • the UE identity can be an identity that is assigned to the SIM card used by the UE.
  • the mapping of the DMRS sequence to a UE identity is unique, such that the DMRS uniquely identifies a single UE.
  • a DMRS can be mapped to two or more UEs. Mapping multiple UEs to a single DMRS reduces the collision probability among UEs transmitting grantless UL transmissions simultaneously on the same resources.
  • the eNB may use information from control information that is part of the data transmission to determine the UE. For example, the control i nformal ion can include the UE identity.
  • the eNB 202 When the UE 204 wants to send data to the eNB 202 in a grantless, unscheduled mode, the eNB 202 will not have advanced knowledge of the transmission. The eNB 202, therefore, needs to detect the presence of a transmission and identify the UE that is transmitting. Any sequence with a constant amplitude zero autocorrelation property can be used to identify the presence of a transmission, reduce collisions amount UEs and may provide information on the UE identity. For example, a DMRS uses a Zadoff-Chu (ZC) sequence. The DMRS, therefore, can be used to detect the presence of PUSCH data transmissions, to estimate the channel, and provide the identity information of the UE transmitting the data.
  • ZC Zadoff-Chu
  • the UE 204 may generate a DMRS in a way that indicates or provides some information on the UE' s identity.
  • DMRS a DMRS in a way that indicates or provides some information on the UE' s identity.
  • a root index determines the base sequence of the DMRS.
  • a cyclic shift (CS) is used to make the DMRS orthogonal in the frequency domain.
  • An orthogonal cover code (OCC) may be applied in the time domain and/or frequency domain to make the DM S signal orthogonal to other DMRSs.
  • the eNB 202 determines the root index, CS, and OCC that were used to generate the DMRS.
  • j ust the root index, or the root index and CS may be used to generate the DMRS.
  • not all three aspects are required for identifying a PUSCH transmission and/or UE identity.
  • just the root index may be used to identify the presence of the transmission and to provide information on the UE identity.
  • the CS and OCC together may be used to generate the DMRS and identify the presence of the PUSCH transmission and the transmitting UE' s identity.
  • the UE Before transmitting data on unlicensed spectrum, the UE performs a successful LBT procedure 214 on one or more carriers. Once the LBT procedure indicates that the one or more carriers are available, the UE 204 transmits both data and one or more DMRSs 216 to the eNB 202 on the available carrier(s). Because the eNB 202 does not have knowledge that the UE is transmitting data, the eNB may blindly detect if there is any grantless transmission on the available resources. For example, the eNB may correlate received signals on any resource used for grantless, unscheduled UE
  • the eNB 202 determines the parameters, such as the root index, CS, and OCC, used by the UE to generate the DMRS. Using one or more of the root index, CS, and OCC, the eNB 202 is able to determine the presence of a grantless transmission and some information on the UE identity of the UE that transmitted the DMRS. In some embodiments, the information on the UE identity identifies the transmitting UE. If a one-to-one mapping is used, the eNB 202 is able to determine the UE itself 218.
  • the eNB is able to select a set of UEs who share the received DMRS sequence.
  • the UE identity can be decoded from the data portion of the grantless transmission and matched to one of the set of UEs.
  • the eNB can signal the root index, CS, and/or OCC via radio resource control (RRC) signaling or other high layer signaling.
  • RRC radio resource control
  • the selection of the root index, CS, and OCC can be a function of the UE identity.
  • the root index may be selected using a modulo operation. For example, mod(UE identity, N) where N is the number of available root indexes that can be used for grantless, non-scheduled
  • the selection of the CS and OCC may be done is a similar way.
  • the CS may be selected as mod(UE identity, N), where N is the number of available CS, e.g.., 12.
  • the OCC can be selected as mod(UE identity, N) where N is the number of available OCCs.
  • the UE identity is a radio network temporary identifier (RNTI) such as a cell RNTI (C-RNTT).
  • RNTI radio network temporary identifier
  • C-RNTT cell RNTI
  • the number of available root indexes used for grantless, non- scheduled transmission may be determined to integrate with legacy LTE systems.
  • M Resource Elements
  • the ZC sequence is extended to the length of DMRS by copying the first (length of DMRS-M) elements to the end of the ZC sequence.
  • DMRS length 120, it includes the 1 13 ZC sequence with elements 0-6 added at the end of the ZC sequence.
  • the number of root indexes used in legacy LTE systems defined to generate an UL DMRS is 60, leaving M-60 unused but available ZC sequences that may be used to generate M-60 root indexes.
  • M is equal 113 leading to 53 root indexes that can be used for grantless transmissions.
  • some or all of the defined 60 root indexes may be allocated to scheduled UEs.
  • a function such as those defined above, may be used to map a root index to a particular UE.
  • the remaining and unused 53 root indexes may be used for non-scheduled, grantless UEs.
  • a function such as those defined above, may be used to map a root index to a particular UE.
  • Different functions may be used for the two groups of root indexes.
  • two separate sets of root indexes are defined, with one set being used by scheduled UL transmissions and the other set being used by non-scheduled, grantless UL transmissions.
  • a part of the 60 DMRS sequences may be assigned to scheduled UL transmissions while another part of the 60 DMRS sequences may be assigned to grantless transmission.
  • the eNB may provide the set of available root indexes to the UE via downlink signaling.
  • the UE may then select the root index to use based upon its UE identity.
  • the eNB may know the UE identity and the function used by the UE to select a root index, allowing the eNB to map a root index to a UE identity.
  • the UE may receive the available root indexes as part of a system information or received from an eNB but indicated as being used across multiple eNBs or the entire system.
  • the eNB provides the root index that a particular UE should use via downlink signaling.
  • the other aspects of an DM RS e.g., CS and OCC, may be provided/determined in similar ways.
  • FIG. 3 illustrates an interlaced structure for uplink transmissions according to some embodiments.
  • a first graph 302 illustrates various interlaces, where the y-axes may represent resource block (RB) indexes and the x-axes may represent symbols.
  • each interlace includes ten physical resource blocks (PRBs). Each interlace is shown in Figure 3 as rows with different shading to differentiate different interlaces.
  • PRBs physical resource blocks
  • the system bandwidth may be 20MHz, with a total of one hundred PRBs and ten interlaces.
  • the distance between PRBs in the same interlace is a multiple of 10.
  • interlace 0 has PRBO, PRB 0, PRB20, and up through PRB90.
  • Interlace 1 has PRB 1 , PRB 1 1 , PRB21 , and up through PRB91.
  • the system bandwidth may be 10MHz.
  • Each RB may have 12 subcarriers, which are illustrated in a second graph 304.
  • the symbols illustrated in graphs 302 and 304 may be symbols that are transmitted on the PUSCH. Transmission of resource blocks can be interlaced with other resource blocks as shown, similar to the PUSCH and short physical uplink control channel (sPUCCH) transmissions in MF systems.
  • sPUCCH short physical uplink control channel
  • Multiple interlaces can be allocated to different UEs or to the same UE.
  • the DMRS may be transmitted at the center symbol of a slot within an UL transmission. This is similar to where the DMRS is transmitted in PUSCH transmissions in legacy LTE systems.
  • two slots 310 and 312 may be defined. Each illustrated slot includes seven symbols.
  • the DMRS may be transmitted as the center symbol of each slot, illustrated as symbol 320 for slot 310 and 322 for slot 312.
  • the other symbols 330 may be used to transmit data from the UE.
  • the DMRS may also be transmitted at the start of a UL burst. This allows the DMRS to be used as an initial signal to indicate to the eNB that a UL burst from a particular UE is starting. As the eNB does not know when and exactly where a grantless, non-scheduled UE transmission will arrive, a successful detected DMRS may indicate that a LIL burst follows the DMRS.
  • a UE completes a LBT procedure prior to transmitting data. In addition, due to the nature of unlicensed spectrum, various devices may transmit at any time within the same unlicensed spectrum.
  • a UE may complete a LBT procedure at any time but be unable to start transmitting data due to the subframe or slot boundary alignment requirement of PUSCH transmissions.
  • the LBT procedure may complete in the middle of a subframe, slot, and/or symbol, such that the UE needs to wait for the next subframe, slot, and/or svmboi boundary before transmitting data. If the UE, however, does not start transmitting some data another device could complete its LBT procedure and start transmitting, thus, grabbing the channel and blocking the transmission of the UE.
  • the UE may repeatedly transmit a DMRS to reserve the spectrum.
  • the eNB can use this leading DMRS to determine that the UE will soon begin a non-scheduled, grantless data transmission.
  • the DMRS is transmitted at the start of a UL transmission after the end of a successful LBT and before the following slot or subframe boundary where a PUSCH transmission can start.
  • the DMRS may still be transmitted at the center symbol in each slot of the PUSCH transmission.
  • the DMRS sequence transmitted before the start of PUSCH transmission and the DMRS sequence transmitted within PUSCH subframes may be different.
  • the eNB When the DMRS is used at the start of a UL burst or as a reservation signal, the eNB is able to detect the UL transmission earlier than if the DMRS is only transmitted in the center symbol of each slot of the PUSCH transmission.
  • the DMRS transmitted at the start of a UL burst may indicate, to the eNB, the start of a UL burst. This allows the UE to start a UL burst within a partial subframe or slot, where the UL burst is not aligned with the subframe or slot boundary.
  • the DMRS may also provide an automatic gain control (AGC) setting for each UL burst transmission.
  • AGC automatic gain control
  • circuitry may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group), and/or memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide ASIC.
  • 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.
  • FIG. 4 illustrates, for one embodiment, example components of a User Equipment (UE) device 400.
  • the example components may also be used in an eNB.
  • the UE device 400 may include application circuitry 402, baseband circuitry 404, Radio Frequency (RF) circuitry 406, front-end module FEM) circuitry 408 and one or more antennas 410, coupled together at least as shown.
  • RF Radio Frequency
  • FEM front-end module
  • the application circuitry 402 may include one or more application processors.
  • the application circuitry 402 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the processor(s) may include any combination of general -purpose processors and dedicated processors (e.g., graphics processors, application processors, etc.).
  • the processors may be coupled with and/or may include 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 404 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the baseband circuitry 404 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 406 and to generate baseband signals for a transmit signal path of the RF circuitry 406.
  • Baseband processing circuity 404 may interface with the application circuitry 402 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 406,
  • the baseband circuitry 404 may include a second generation (2G) baseband processor 404a, third generation (3G) baseband processor 404b, fourth generation (4G) baseband processor 404c, and/or other baseband processor(s) 404d for other existing generations, generations in development or to be developed in the future (e.g., fifth generation (5G), 6G, etc.).
  • the baseband circuitry 404 e.g., one or more of baseband processors 404a-d
  • the radio control functions may include, but are not limited to, signal modulation/demodulation,
  • modulation/demodulation circuitry of the baseband circuitry 404 may include Fast-Fourier Transform (FFT), preceding, and/or constellation
  • encoding/decoding circuitry of the baseband circuitry 404 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 404 may include elements of a protocol stack such as, for example, elements of an evolved universal terrestrial radio access network (EUTRAN) protocol including, for example, physical (PHY), media access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), and/or radio resource control (RRC) elements.
  • EUTRAN evolved universal terrestrial radio access network
  • a central processing unit (CPU) 404e of the baseband circuitry 404 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) 404f.
  • the audio DSP(s) 404f may be include elements for
  • compression/decompression and echo cancellation 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 404 and the application circuitry 402 may be implemented together such as, for example, on a system on a chip (SOC).
  • SOC system on a chip
  • the baseband circuitry 404 may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry 404 may support communication with an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMA.N), a wireless local area network (WLAN), a wireless personal area network (WPAN).
  • EUTRAN evolved universal terrestrial radio access network
  • WMA.N 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 406 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
  • the RF circuitry 406 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • RF circuitry 406 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 408 and provide baseband signals to the baseband circuitry 404.
  • RF circuitry 406 may also include a transmit signal path which may include circuitry to up-convert baseband signals provided by the baseband circuitry 404 and provide RF output signals to the FEM circuitry 408 for transmission.
  • the RF circuitry 406 may include a receive signal path and a transmit signal path.
  • the receive signal path of the RF circuitry 406 may include mixer circuitry 406a, amplifier circuitry 406b and filter circuitry 406c.
  • the transmit signal path of the RF ' circuitry 406 may include filter circuitry 406c and mixer circuitry 406a.
  • RF circuitry 406 may also include synthesizer circuitry 406d for synthesizing a frequency for use by the mixer circuitry 406a of the receive signal path and the transmit signal path.
  • the mixer circuitry 406a of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 408 based on the synthesized frequency provided by synthesizer circuitry 406d.
  • the amplifier circuitry 406b may be configured to amplify the down-converted signals and the filter circuitry 406c 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 404 for further processing.
  • the output baseband signals may be zero-frequency baseband signals, although this is not a requirement.
  • mixer circuitry 406a of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry 406a of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 406d to generate RF output signals for the FEM circuitry 408.
  • the baseband signals may be provided by the baseband circuitry 404 and may be filtered by filter circuitry 406c.
  • the filter circuitry 406c may include a low-pass filter (LPF), although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry 406a of the receive signal path and the mixer circuitry 406a of the transmit signal path may include two or more mixers and may be arranged for quadrature down con version and/or upconversion respectively.
  • the mixer circuitry 406a of the receive signal path and the mixer circuitry 406a of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g..
  • the mixer circuitry 406a of the receive signal path and the mixer circuitry 406a may be arranged for direct downconversion and/or direct upconversion, respectively. In some embodiments, the mixer circuitry 406a of the receive signal path and the mixer circuitry 406a 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 406 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 404 may include a digital baseband interface to communicate with the RF circuitry 406.
  • ADC analog-to-digital converter
  • DAC digital-to-analog converter
  • the synthesizer circuitry 406d may be a fractional-N synthesizer or a fractional N/N+1 synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable.
  • synthesizer circuitry 406d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.
  • the synthesizer circuitry 406d may be configured to synthesize an output frequency for use by the mixer circuitry 406a of the RF circuitry 406 based on a frequency input and a divider control input.
  • the synthesizer circuitry 406d may be a fractional N/N+1 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 404 or the applications processor 402 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 402,
  • Synthesizer circuitry 406d of the RF circuitry 406 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 406d 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 ( ho).
  • the RF circuitry 406 may include an IQ/polar converter.
  • FEM circuitry 408 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 410, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 406 for further processing.
  • FEM circuitry 408 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF ' circuitry 406 for transmission by one or more of the one or more antennas 410.
  • the FEM circuitry 408 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 406).
  • LNA low-noise amplifier
  • the transmit signal path of the FEM circuitry 408 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 406), and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 410.
  • PA power amplifier
  • the LIE device 400 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. 5 illustrates a block diagram of an example machine 500 upon which any one or more of the techniques (e.g., methodologies) discussed herein may perform.
  • the machine 500 may operate as a standalone device or may be connected (e.g. , networked) to other machines.
  • the machine 500 may operate in the capacity of a server machine, a client machine, or both in server-client network environments.
  • the machine 500 may act as a peer machine in peer-to-peer (P2P) (or other distributed) network environment.
  • P2P peer-to-peer
  • the machine 500 may be a user equipment (UE), evolved Node B (eNB), Wi-Fi access point (AP), Wi-Fi station (STA), personal computer (PC), a tablet PC, a set-top box (STB), a personal digital assistant (PDA), a mobile telephone, a smart phone, a web appliance, a network router, switch or bridge, or any machine capable of executing instructions (sequential or otherwise) that specify actions to be taken by that machine.
  • UE user equipment
  • eNB evolved Node B
  • AP Wi-Fi access point
  • STA Wi-Fi station
  • PC personal computer
  • PDA personal digital assistant
  • STB set-top box
  • mobile telephone a smart phone
  • web appliance a web appliance
  • network router switch or bridge
  • Examples, as described herein, may include, or may operate on, logic or a number of components, modules, or mechanisms.
  • Modules are tangible entities (e.g., hardware) capable of performing specified operations and may be configured or arranged in a certain manner.
  • circuits may be arranged (e.g., internally or with respect to external entities such as other circuits) in a specified manner as a module.
  • the whole or part of one or more computer systems (e.g., a standalone, client or server computer system) or one or more hardware processors may be configured by firmware or software (e.g., instructions, an application portion, or an application) as a module that operates to perform specified operations.
  • the software may- reside on a machine readable medium.
  • the software when executed by the underlying hardware of the modul e, causes the hardware to perform the specified operations.
  • module is understood to encompass a tangible entity, be that an entity that is physically constructed, specifically configured (e.g., hardwired), or temporarily (e.g., transitorily) configured (e.g., programmed) to operate in a specified manner or to perform part or all of any operation described herein.
  • each of the modules need not be instantiated at any one moment in time.
  • the modules comprise a general-purpose hardware processor configured using software
  • the general -purpose hardware processor may be configured as respective different modules at different times.
  • Software may accordingly configure a hardware processor, for example, to constitute a particular module at one instance of time and to constitute a different module at a di fferent instance of time.
  • Machine 500 may include a hardware processor 502 (e.g., a central processing unit (CPU), a graphics processing unit (GPU), a hardware processor core, or any combination thereof), a main memory 504 and a static memory 506, some or all of which may communicate with each other via an interlink (e.g., bus) 508.
  • the machine 500 may further include a display unit 510, an alphanumeric input device 512 (e.g., a keyboard), and a user interface (UI) navigation device 514 (e.g., a mouse).
  • the display unit 510, input device 512 and UI navigation device 514 may be a touch screen display.
  • the machine 500 may additionally include a storage device (e.g., drive unit) 516, a signal generation device 518 (e.g., a speaker), a network interface device 520, and one or more sensors, such as a global positioning system (GPS) sensor, compass, accelerometer, or other sensor.
  • the machine 500 may include an output controller 528, such as a serial (e.g., universal serial bus (USB), parallel, or other wired or wireless (e.g., infrared (IR), near field communication (NFC), etc.) connection to communicate or control one or more peripheral devices (e.g., a printer, card reader, etc).
  • a serial e.g., universal serial bus (USB), parallel, or other wired or wireless (e.g., infrared (IR), near field communication (NFC), etc.) connection to communicate or control one or more peripheral devices (e.g., a printer, card reader, etc).
  • USB universal serial bus
  • IR infrared
  • the storage device 516 may include a machine readable medium 522 on which is stored one or more sets of data structures or instructions 524 (e.g., software) embodying or utilized by any one or more of the techniques or functions described herein.
  • the instructions 524 may also reside, completely or at least partially, within the main memory 504, within static memory 506, or within the hardware processor 502 during execution thereof by the machine 500.
  • one or any combination of the hardware processor 502, the main memory 504, the static memory 506, or the storage device 516 may constitute machine readable media,
  • machine readable medium 522 is illustrated as a single medium, the term “machine readable medium” may include a single medium or multiple media (e.g., a centralized or distributed database, and/or associated caches and servers) configured to store the one or more instructions 524,
  • machine readable medium may include any medium that is capable of storing, encoding, or carrying instructions for execution by the machine 500 and that cause the machine 500 to perform any one or more of the techniques of the present disclosure, or that is capable of storing, encoding or carrying data structures used by or associated with such instructions.
  • Non- limiting machine readable medium examples may include solid-state memories, and optical and magnetic media.
  • machine readable media may include: non-volatile memory, such as semiconductor memory devices (e.g., Electrically Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM)) and flash memory devices; magnetic disks, such as internal hard disks and removable disks, magneto-optical disks; Random Access Memory (RAM); and CD-ROM and DVD-ROM disks.
  • non-volatile memory such as semiconductor memory devices (e.g., Electrically Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM)) and flash memory devices
  • magnetic disks such as internal hard disks and removable disks, magneto-optical disks
  • RAM Random Access Memory
  • CD-ROM and DVD-ROM disks CD-ROM and DVD-ROM disks.
  • machine readable media may include non-transitory machine readable media.
  • machine readable media may include machine readable media that is not a transitory propagating signal.
  • the instructions 524 may further be transmitted or received over a communications network 526 using a transmission medium via the network interface device 520 utilizing any one of a number of transfer protocols (e.g., frame relay, internet protocol (IP), transmission control protocol (TCP), user datagram protocol (UDP), hypertext transfer protocol (HTTP), etc.).
  • transfer protocols e.g., frame relay, internet protocol (IP), transmission control protocol (TCP), user datagram protocol (UDP), hypertext transfer protocol (HTTP), etc.
  • Example communication networks may include a local area network (LAN), a wide area network (WAN), a packet data network (e.g., the Internet), mobile telephone networks (e.g., cellular networks), Plain Old Telephone (POTS) networks, and wireless data networks (e.g., Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards known as Wi-Fi®, IEEE 802.16 family of standards known as WiMax ⁇ ), IEEE 802.15.4 family of standards, a Long Term Evolution (LTE) family of standards, a Universal Mobile Telecommunications System (UMTS) family of standards, peer-to-peer (P2P) networks, among others.
  • LAN local area network
  • WAN wide area network
  • POTS Plain Old Telephone
  • wireless data networks e.g., Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards known as Wi-Fi®, IEEE 802.16 family of standards known as WiMax ⁇
  • IEEE 802.15.4 family of standards e.g., Institute of Electrical and Electronics Engineers (IEEE
  • the network interface device 520 may include one or more physical jacks (e.g., Ethernet, coaxial, or phone jacks) or one or more antennas to connect to the communications network 526.
  • the network interface device 520 may include a plurality of antennas to wirelessly communicate using at least one of single-input multiple-output (SIMO), multiple-input multiple-output (MEVIO), or multiple-input single-output (MISO) techniques.
  • SIMO single-input multiple-output
  • MEVIO multiple-input multiple-output
  • MISO multiple-input single-output
  • the network interface device 520 may wirelessly communicate using Multiple User MIMO techniques.
  • the term "transmission medium" shall be taken to include any intangible medium that is capable of storing, encoding or carrying instructions for execution by the machine 500, and includes digital or analog communications signals or other intangible medium to facilitate communication of such software.
  • Example 1 is an apparatus of an evolved Node B (eNB), the apparatus comprising: memory and processing circuitry configured to: map a user equipment (UE) identity to a UE; correlate a De-Modulation Reference Signal (DMRS), received on unlicensed spectrum on a physical uplink shared channel (PUSCH) from an unidentified UE, across a plurality of possible root indexes to determine a root index used to generate the DMRS, and wherein the DMRS was transmitted as part of a grant-less, unscheduled transmission unassociated with an uplink grant; determine a UE identity of the unidentified UE based upon at least the root index; and identify the UE mapped to the UE identity, wherein the UE transmitted the DMRS.
  • UE user equipment
  • PUSCH physical uplink shared channel
  • Example 2 the subject matter of Example 1 optionally includes wherein data is transmitted on the one or more channels using a frame structure comprised of slots, each slot comprising seven symbols, and wherein the DMRS is received at a center of each slot.
  • Example 3 the subject matter of any one or more of Examples 1-2 optionally include wherein the DMRS is received at a start of an uplink burst.
  • Example 4 the subject matter of any one or more of Examples 1-3 optionally include wherein the DMRS is received after a start and before an end of an uplink (UL) subframe, the processing circuitry is further configured to: receive additional DMRSs up to an end of the UL subframe; and decode PUSCH data from the UE as part of a UL burst starting in a next UL subframe after the UL subframe.
  • the processing circuitry is further configured to: receive additional DMRSs up to an end of the UL subframe; and decode PUSCH data from the UE as part of a UL burst starting in a next UL subframe after the UL subframe.
  • Example 5 the subject matter of any one or more of Examples 1-4 optionally include wherein the processing circuity is further configured to encode an indication of a set of DMRS sequences that can he used for grantiess transmissions in radio resource control (RRC) signaling for the UE.
  • RRC radio resource control
  • Example 6 the subject matter of any one or more of Examples 1-5 optionally include wherein the processing circuitry is further configured to decode the UE identity from PUSCH data from the UE.
  • Example 7 the subject matter of any one or more of Examples 1-6 optionally include root indexes to identify unscheduled, grantiess UEs, wherein M is the total number of root indexes that can be used to generate DMRS,
  • Example 8 the subject matter of any one or more of Examples 1-7 optionally include wherein the processing circuitry is further configured to select a root index for the UE based upon the UE identity and a set of root indexes available to identify grantiess transmissions.
  • Example 9 the subject matter of Example 8 optionally includes wherein the processing circuitry is further configured to: correlate the DMRS received on the unlicensed spectrum across a plurality of possible cyclic shift (CS) and a plurality of possible orthogonal cover codes (OCC) to determine a CS and an OCC used to generate the DMRS; and determine the UE identity of the unidentified UE based upon at least the CS and the OCC.
  • CS cyclic shift
  • OCC orthogonal cover codes
  • Example 10 the subject matter of Example 9 optionally includes wherein the processing circuitry is further configured select a CS for the UE based upon the UE identity and a set of cyclic shifts available.
  • Example 11 the subject matter of Example 10 optionally includes wherein the processing circuitry is further configured to select an OCC for the UE based upon the UE identity and a set of OCCs available.
  • Example 12 the subject matter of any one or more of Examples 1-1 1 optionally include wherein the UE identity is a Cell Radio Network Temporary Identifier (C-RNTI).
  • C-RNTI Cell Radio Network Temporary Identifier
  • Example 13 is an apparatus of an evolved Node B (eNB), the apparatus comprising: memory and processing circuitry configured to: map a user equipment (UE) identity to a UE; correlate a DeModulation Reference Signal (DMRS), received on unlicensed spectrum on a physical uplink shared channel (PUSCH) from an unidentified UE, across a plurality of possible cyclic shift (CS) and orthogonal cover codes (OCC) to determine a CS and an OCC used to generate the DMRS, and wherein the DMRS was transmitted as part of a grant-less, unscheduled transmission unassociated with an uplink grant;
  • UE user equipment
  • PUSCH physical uplink shared channel
  • OCC orthogonal cover codes
  • Example 14 the subject matter of Example 13 optionally includes wherein the DMRS is received at a start of an uplink burst.
  • Example 15 the subject matter of any one or more of Examples 13-14 optionally include wherein data is transmitted on the one or more channels using a frame structure comprised of slots, each slot comprising seven symbols, and wherein the DMRS is received at a center of each slot.
  • Example 16 the subject matter of any one or more of Examples
  • 13- 1 5 optionally include wherein the DMRS is received after a start and before an end of an uplink (UL) subframe, the processing circuitry is further configured to: receive additional DMRSs up to an end of the UL subframe; and decode PUSCH data from the UE as part of a UL burst starting in a next UL subframe after the UL subframe.
  • UL uplink
  • Example 17 the subject matter of any one or more of Examples 14-16 optionally include wherein the processing circuity is further configured to encode a set of CSs, and OCCs that can be used to identify a presence of grantless transmissions in radio resource control (RRC) signaling for the UE, wherein the CS and the OCC are in the set of CSs and OCCs.
  • RRC radio resource control
  • Example 18 the subject matter of any one or more of Examples 14-17 optionally include wherein the processing circuitry is further configured to decode the UE identity from PUSCH data from the UE.
  • Example 19 the subject matter of any one or more of Examples
  • Root indexes to identify unscheduled, grantless UEs, wherein M is the total number of root indexes that can be used to generate DMRS.
  • Example 20 the subject matter of any one or more of Examples 14-19 optionally include wherein the processing circuitry is further configured to select a CS for the UE based upon the UE identity and a set of cyclic shifts available.
  • Example 21 the subject matter of Example 20 optionally includes wherein the processing circuitry is further configured to select an OCC for the UE based upon the UE identity and a set of OCCs available.
  • Example 22 the subject matter of Example 21 optionally includes wherein the processing circuitry is further configured to: correlate the DMRS received on the unlicensed spectrum across a plurality of possible root indexes to determine a root index used to generate the DMRS, and select the root index for the UE based upon the UE identity and a set of root indexes available to identify UEs; and determine the UE identity of the unidentified UE based upon at least the root index.
  • Example 23 the subject matter of any one or more of Examples 14-22 optionally include wherein the UE identity is a Cell Radio Network Temporary Identifier (C-RNTI).
  • C-RNTI Cell Radio Network Temporary Identifier
  • Example 24 is an apparatus of user equipment (UE), the apparatus comprising: memory and processing circuitry configured to: select a root index to generate a DeModulation Reference Signal (DMRS) based upon the UE identity, wherein the root index is associated with the UE; perform a listen- before-talk (LBT) procedure on one or more channels on unlicensed spectrum; generate the DMRS for transmission, after the LBT procedure, to an evolved node B (eNB) on the one or more channels on a physical uplink shared channel (PUSCH) using the root index, wherein the DMRS is transmitted as part of a grant-less, unscheduled transmissions unassociated with an uplink grant, and wherein the root index is an indication of an identity of the UE.
  • DMRS DeModulation Reference Signal
  • Example 25 the subject matter of Example 24 optionally includes wherein data is transmitted on the one or more channels using a frame structure comprised of slots, each slot comprising seven symbols, and wherein the DMRS is transmitted at a center of each slot.
  • Example 26 the subject matter of any one or more of Examples 24-25 optionally include wherein the D S is transmitted at a start of an uplink burst.
  • Example 27 the subject matter of any one or more of Examples 24-26 optionally include wherein the DMRS is repeatedly transmitted starting in a partial uplink (UL) subframe through an end of the UL subframe to indicate a start of a grantless UL transmission in a next UL subframe after the partial UL subframe.
  • UL partial uplink
  • Example 28 the subject matter of any one or more of Examples 24-27 optionally include wherein the processing circuity is further configured to decode an indication of a set of DMRS sequences that can be used for grantless transmissions from radio resource control (RRC) signaling,
  • RRC radio resource control
  • Example 29 the subject matter of any one or more of Examples 24-28 optionally include wherein the processing circuitry is further configured to encode the UE identity in PUSCH data for transmission to the eNB.
  • Example 30 the subject matter of any one or more of Examples 24-29 optionally include wherein the processing circuitry is further configured to select a root index based upon the UE identity and a set of root indexes available to identify UEs.
  • Example 31 the subject matter of Example 30 optionally includes wherein the processing circuitry is further configured to: select a cyclic shift (CS) based upon the UE identity and a set of cyclic shifts available; and generate the DMRS with the selected CS,
  • CS cyclic shift
  • Example 32 the subject matter of Example 31 optionally includes wherein the processing circuitry is further configured to: select an orthogonal cover code (OCC) based upon the UE identity and a set of OCCs available; and generate the DMRS with the selected OCC.
  • OCC orthogonal cover code
  • Example 33 the subject matter of any one or more of Examples 24-32 optionally include wherein the UE identity is a Cell Radio Network Temporary Identifier (C-RNTI).
  • C-RNTI Cell Radio Network Temporary Identifier
  • Example 34 is an apparatus of user equipment (UE), the apparatus comprising: memory and processing circuitry configured to: select a cyclic shift (CS) to generate a DeModulation Reference Signal (DMRS) based upon the UE identity, wherein the CS is associated with the UE; select an orthogonal cover code (OCC) to generate the DMRS based upon the UE identity, wherein the OCC is associated with the UE; perform a listen-before-talk (LBT) procedure on one or more channels on unlicensed spectrum; encode the DMRS for a cyclic shift (CS) to generate a DeModulation Reference Signal (DMRS) based upon the UE identity, wherein the CS is associated with the UE; select an orthogonal cover code (OCC) to generate the DMRS based upon the UE identity, wherein the OCC is associated with the UE; perform a listen-before-talk (LBT) procedure on one or more channels on unlicensed spectrum; encode the DMRS for a cyclic shift (CS) to generate
  • eNB evolved node B
  • PUSCH physical uplink shared channel
  • the DMRS is transmitted as part of a grant-less, unscheduled transmission unassociated with an uplink grant
  • the CS and OCC are an indication of an identity of the UE.
  • Example 35 the subject matter of Example 34 optionally includes wherein data is transmitted on the one or more channels using a frame structure comprised of slots, each slot comprising seven symbols, and wherein the DMRS is transmitted at a center of each slot.
  • Example 36 the subject matter of any one or more of Examples 34-35 optionally include wherein the DMRS is transmitted at a start of an uplink burst.
  • Example 37 the subject matter of any one or more of Examples 34-36 optionally include wherein the DMRS is repeatedly transmitted starting in a partial uplink (UL) subframe through an end of the UL subframe to indicate a start of a UL burst in a next UL subframe after the partial UL subframe.
  • UL uplink
  • Example 38 the subject matter of any one or more of Examples 34-37 optionally include wherein the processing circuity is further configured to decode a set of CSs, and OCCs that can be used to identify a presence of grantless transmissions in radio resource control (RRC) signaling for the UE, wherein the selected CS and the selected OCC are in the set of CSs and OCCs.
  • RRC radio resource control
  • Example 39 the subject matter of any one or more of Examples 34-38 optionally include wherein the processing circuitry is further configured to encode the UE identity in PUSCH data for transmission to the eNB.
  • Example 40 the subject matter of any one or more of Examples 34-39 optionally include wherein the processing circuitry is further configured to: select a root index based upon the UE identity and a set of root indexes available to identify UEs; and generate the DMRS with the selected root index, [0098]
  • Example 41 the subject matter of Example 40 optionally includes wherein the processing circuitry is further configured to select a cyclic shift (CS) based upon the UE identity and a set of cyclic shifts available.
  • CS cyclic shift
  • Example 42 the subject matter of Example 41 optionally includes wherein the processing circuitry is further configured to select an orthogonal cover code (OCC) based upon the UE identity and a set of OCCs available.
  • OCC orthogonal cover code
  • Example 43 the subject matter of any one or more of Examples 34-42 optionally include wherein the UE identity is a Cell Radio Network Temporary Identifier (C-RNTI).
  • C-RNTI Cell Radio Network Temporary Identifier
  • Example 44 is a computer-readable medium comprising
  • an evolved Node B upon execution of the instructions by processing circuitry of the eNB, to: map a user equipment (UE) identity to a UE, correlate a DeModulation Reference Signal (DMRS), received on unlicensed spectrum on a physical uplink shared channel (PUSCH) from an unidentified UE, across a plurality of possible root indexes to determine a root index used to generate the DMRS, and wherein the DMRS was transmitted as part of a grant-less, unscheduled transmission unassociated with an uplink grant; determine a UE identity of the unidentified UE based upon at least the root index; and identify the UE mapped to the UE identity, wherein the UE transmitted the DMRS.
  • UE user equipment
  • PUSCH physical uplink shared channel
  • Example 45 the subject matter of Example 44 optionally includes wherein data is transmitted on the one or more channels using a frame structure comprised of slots, each slot comprising seven symbols, and wherein the DMRS is received at a center of each slot.
  • Example 46 the subject matter of any one or more of Examples 44-45 optionally include wherein the DMRS is received at a start of an uplink burst.
  • Example 47 the subject matter of any one or more of Examples 44-46 optionally include wherein the DMRS is received after a start and before an end of an uplink (UL) subframe, the instructions further comprising instructions to: receive additional DMRSs up to an end of the UL subframe; and decode PUSCH data from the UE as part of a UL burst starting in a next UL subframe after the UL subframe.
  • the instructions further comprising instructions to: receive additional DMRSs up to an end of the UL subframe; and decode PUSCH data from the UE as part of a UL burst starting in a next UL subframe after the UL subframe.
  • Example 48 the subject matter of any one or more of Examples 44-47 optionally include instructions to encode an indication of a set of DMRS sequences that can be used for grantless transmissions in radio resource control (RRC) signaling for the UE.
  • RRC radio resource control
  • Example 49 the subject matter of any one or more of Examples 44-48 optionally include wherein the processing circuitry is further configured to decode the UE identity from PUSCH data from the UE.
  • Example 50 the subject matter of any one or more of Examples 44-49 optionally include root indexes to identify unscheduled, grantless UEs, wherein M is the total number of root indexes that can be used to generate OMRS,
  • Example 51 the subject matter of any one or more of Examples 44-50 optionally include instructions to select a root index for the UE based upon the UE identity and a set of root indexes available to identify UEs.
  • Example 52 the subject matter of Example 51 optionally includes instructions to: correlate the DMRS received on the unlicensed spectrum across a plurality of possible cyclic shift (CS) and orthogonal cover codes (OCC) to determine a CS and an OCC used to generate the DMRS; and determine the UE identity of the unidentified UE based upon at least the CS and the OCC.
  • CS cyclic shift
  • OCC orthogonal cover codes
  • Example 53 the subject matter of Example 52 optionally includes instructions to select a CS for the UE based upon the UE identity and a set of cyclic shifts available.
  • Example 54 the subject matter of Example 53 optionally includes instructions to select an OCC for the UE based upon the UE identity and a set of OCCs available.
  • Example 55 the subject matter of any one or more of Examples 44-54 optionally include wherein the UE identity is a Cell Radio Network Temporary Identifier (C-RNTI).
  • C-RNTI Cell Radio Network Temporary Identifier
  • Example 56 is a computer-readable medium comprising instructions to cause an evolved Node B (eNB), upon execution of the instructions by processing circuitry of the eNB, to: map a user equipment (UE) identity to a UE; correlate a DeModulation Reference Signal (DMRS), received on unlicensed spectrum on a physical uplink shared channel (PUSCH) from an unidentified UE, across a plurality of possible cyclic shift (CS) and orthogonal cover codes (OCC) to determine a CS and an OCC used to generate the DMRS, and wherein the DMRS was transmitted as part of a grant-less, unscheduled transmission unassociated with an uplink grant; determine a UE identity of the unidentified UE based upon at least the CS and OCC; and identify the UE mapped to the UE identity, wherein the UE transmitted the DMRS.
  • eNB evolved Node B
  • Example 57 the subject matter of Example 56 optionally includes wherein the DMRS is received at a start of an uplink burst.
  • Example 58 the subject matter of any one or more of Examples 56-57 optionally include wherein data is transmitted on the one or more channels using a frame structure comprised of slots, each slot comprising seven symbols, and wherein the DMRS is received at a center of each slot.
  • Example 59 the subject matter of any one or more of Examples 56-58 optionally include wherein the DMRS is received after a start and before an end of an uplink (UL) subframe, the instructions further comprising instructions to: receive additional DMRSs up to an end of the UL subframe; and decode PUSCH data from the UE as part of a UL burst starting in a next UL subframe after the subframe.
  • UL uplink
  • Example 60 the subject matter of any one or more of Examples 56-59 optionally include instructions to encode an indication of a set of DMRS sequences that can be used for grantless transmissions in radio resource control (RRC) signaling for the UE.
  • RRC radio resource control
  • Example 61 the subject matter of any one or more of Examples 56-60 optionally include instructions to decode the UE identity from PUSCH data from the UE.
  • Example 62 the subject matter of any one or more of Examples 56-61 optionally include root indexes to identify unscheduled, grantless UEs, wherein M is the total number of root indexes that can be used to generate DMRS.
  • Example 63 the subject matter of any one or more of Examples 56-62 optionally include instructions to select a CS for the UE based upon the UE identity and a set of cyclic shifts available.
  • Example 64 the subject matter of Example 63 optionally includes instructions to select an OCC for the UE based upon the UE identity and a set of OCCs available.
  • Example 65 the subject matter of Example 64 optionally includes instructions to: correlate the DMRS received on the unlicensed spectrum across a plurality of possible root indexes to determine a root index used to generate the DMRS; and determine the UE identity of the unidentified UE based upon at least the root index.
  • Example 66 the subject matter of any one or more of Examples 56-65 optionally include wherein the UE identity is a Cell Radio Network Temporary Identifi er (C-R TI).
  • C-R TI Cell Radio Network Temporary Identifi er
  • Example 67 is a computer-readable medium comprising instructions to cause user equipment (UE), upon execution of the instructions by processing circuitry of the UE, to: select a root index to generate a
  • DMRS DeModulation Reference Signal
  • the root index is associated with the UE; perform a 1 i st en -bef ore-talk (LBT) procedure on one or more channels on unlicensed spectnmi; encode the DMRS for transmission, after the LBT procedure, to an evolved node B (eNB) on the one or more channels on a physical uplink shared channel (PUSCH) using the root index, wherein the DMRS is transmitted as part of a grant-less, unscheduled transmission unassociated with a uplink grant, and wherein the root index is an indication of an identity of the UE.
  • LBT 1 i st en -bef ore-talk
  • Example 68 the subject matter of Example 67 optionally includes wherein data is transmitted on the one or more channels using a frame structure comprised of slots, each slot comprising seven symbols, and wherein the DMRS is transmitted at a center of each slot.
  • Example 69 the subject matter of any one or more of Examples 67-68 optionally include wherein the DMRS is transmitted at a start of an uplink burst.
  • Example 70 the subject matter of any one or more of Examples 67-69 optionally include wherein the DMRS is repeatedly transmitted starting in a partial uplink (UL) subframe through an end of the UL subframe to indicate a start of a UL burst in a next UL subframe after the partial UL subframe.
  • Example 71 the subject matter of any one or more of Examples 67-70 optionally include instructions to decode an indication of a set of DMRS sequences that can be used for grantless transmissions from radio resource control (RRC) signaling for the UE.
  • RRC radio resource control
  • Example 72 the subject matter of any one or more of Examples 67-71 optionally include instructions to encode the UE identity in PUSCH data for transmission to the eNB.
  • Example 73 the subject matter of any one or more of Examples 67-72 optionally include instructions to select a root index based upon the UE identity and a set of root indexes available to identify UEs.
  • Example 74 the subject matter of Example 73 optionally includes instructions to: select a cyclic shift (CS) based upon the UE identity and a set of cyclic shifts available; and generate the DMRS with the selected CS.
  • CS cyclic shift
  • Example 75 the subject matter of Example 74 optionally includes instructions to: select an orthogonal cover code (OCC) based upon the UE identity and a set of OCCs available; and generate the DMRS with the selected OCC.
  • OCC orthogonal cover code
  • Example 76 the subject matter of any one or more of Examples 67-75 optionally include wherein the UE identity is a Cell Radio Network Temporary Identifier (C-RNTI).
  • C-RNTI Cell Radio Network Temporary Identifier
  • Example 77 is a computer-readable medium comprising instructions to cause user equipment (UE), upon execution of the instructions by processing circuitry of the UE, to: select a cyclic shift (CS) to generate a DeModulation Reference Signal (DMRS) based upon the UE identity, wherein the CS is associated with the UE; select an orthogonal cover code (OCC) to generate the DMRS based upon the UE identity, wherein the OCC is associated with the UE; perform a listen-bef ore-talk (LBT) procedure on one or more channels on unlicensed spectrum; encode the DMRS for transmission, after the LBT procedure, to an evolved node B (eNB) on the one or more channels on a physical uplink shared channel (PUSCH) using the CS and the OCC, wherein the DMRS is transmitted as part of a grant-less, unscheduled transmission unassociated with a uplink grant, and wherein the CS and OCC are an indication of an identity of the UE.
  • CS cyclic shift
  • Example 78 the subject matter of Example 77 optionally includes wherein data is transmitted on the one or more channels using a frame structure comprised of slots, each slot comprising seven symbols, and wherein the DMRS is transmitted at a center of each slot.
  • Example 79 the subject matter of any one or more of Examples 77-78 optionally include wherein the DMRS is transmitted at a start of an uplink burst.
  • Example 80 the subject matter of any one or more of Examples 77-79 optionally include wherein the DMRS is repeatedly transmitted starting in a partial uplink (UL) subframe through an end of the UL subframe to indicate a start of a UL burst in a next UL subframe.
  • UL uplink
  • Example 81 the subject matter of any one or more of Examples 77-80 optionally include instructions to decode an indication of a set of DMRS sequences that can be used for grantless transmissions from radio resource control (RRC) signaling for the UE.
  • RRC radio resource control
  • Example 82 the subject matter of any one or more of Examples 77-81 optionally include instructions to encode the UE identity in PUSCH data for transmission to the eNB.
  • Example 83 the subject matter of any one or more of Examples 77-82 optionally include instructions to: select a root index based upon the UE identity and a set of root indexes available to identify UEs; and generate the DMRS with the selected root index.
  • Example 84 the subject matter of Example 83 optionally includes instructions to select a cyclic shift (CS) based upon the UE identity and a set of cyclic shifts available.
  • CS cyclic shift
  • Example 85 the subject matter of Example 84 optionally includes instructions to select an orthogonal cover code (OCC) based upon the UE identity and a set of OCCs available.
  • OCC orthogonal cover code
  • Example 86 the subject matter of any one or more of Examples 77-85 optionally include wherein the UE identity is a Cell Radio Network Temporary Identifier (C-RNTI).
  • C-RNTI Cell Radio Network Temporary Identifier
  • Example 87 is an apparatus of an evolved Node B (eNB), comprising means for performing the functions performed by the memory and processing circuitry of any of Examples 1 through 23,
  • Example 88 is an apparatus of user equipment (UE), comprising means for performing the functions performed by the memory and processing circuitry of any of Examples 24 through 43.
  • Example 89 is a method comprising performing the functions performed by the memory and processing circuitry of any of Examples 1 through
  • Example 90 is a method comprising performing the functions performed by the m emory and processing circuitry of any of Examples 24 through 43.
  • the embodiments as described above may be implemented in various hardware configurations that may include a processor for executing instructions that perform the techniques described. Such instructions may be contained in a machine-readable medium such as a suitable storage medium or a memory or other processor-executable medium.
  • the embodiments as described herein may be implemented in a number of environments such as part of a wireless local area network (WLAN), 3rd Generation Partnership Project (3GPP) Universal Terrestrial Radio Access Network (UTRAN), or Long-Term-Evolution (LTE) or a Long-Term-Evolution (LTE) communication system, although the scope of the disclosure is not limited in this respect.
  • WLAN wireless local area network
  • 3GPP 3rd Generation Partnership Project
  • UTRAN Universal Terrestrial Radio Access Network
  • LTE Long-Term-Evolution
  • LTE Long-Term-Evolution
  • LTE Long-Term-Evolution
  • LTE Long-Term-Evolution
  • Antennas referred to herein may comprise one or more directional or omnidirectional antennas, including, for example, dipoie antennas, monopole antennas, patch antennas, loop antennas, microstrip antennas or other types of antennas suitable for transmission of RF signals.
  • a single antenna with multiple apertures may be used.
  • each aperture may be considered a separate antenna.
  • antennas may be effectively separated to take advantage of spatial diversity and the different channel characteristics that may result between each of antennas and the antennas of a transmitting station.
  • antennas may be separated by up to 1/10 of a wavelength or more,
  • a receiver as described herein may be configured to receive signals in accordance with specific communication standards, such as the Institute of Electrical and Electronics Engineers (IEEE) standards including IEEE 802.1 1 standards and/or proposed specifications for WLANs, although the scope of the disclosure is not limited in this respect as they may also be suitable to transmit and/or receive communications in accordance with other techniques and standards.
  • IEEE Institute of Electrical and Electronics Engineers
  • the receiver may be configured to receive signals in accordance with the IEEE
  • the receiver may be configured to receive signal s in accordance with the Universal Terrestrial Radio Access Network (UTRAN) LTE communication standards.
  • UTRAN Universal Terrestrial Radio Access Network
  • 16 standards please refer to "IEEE Standards for Information Technology -- Telecommunications and Information Exchange between Systems" - Local Area Networks - Specific Requirements - Part 1 1 "Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY), ISO/IEC 8802-1 1 : 1999", and Metropolitan Area Networks - Specific Requirements - Part 16: "Air Interface for Fixed Broadband Wireless Access Systems," May 2005 and related amendments/versions.
  • 3 GPP 3rd Generation Partnership Project

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Abstract

L'invention concerne également des procédés et un appareil permettant à un équipement utilisateur (UE) de transmettre des données sur un spectre sans licence en utilisant des systèmes, tels que MulteFire et l'accès assisté par licence amélioré (eLAA) Des modes de réalisation permettent d'émettre des données sur un canal partagé de liaison montante physique (PUSCH) vers un nœud B évolué (eNB) sans d'abord recevoir une autorisation de liaison montante (UL) de la part de l'eNB. Des modes de réalisation de Signaux de Référence de Démodulation (DMRS) décrits permettent à l'eNB de détecter la présence d'une transmission en liaison montante et d'identifier l'UE transmettant des données.
PCT/US2017/019487 2016-02-25 2017-02-24 Détection de transmission de transmissions en liaison montante non planifiées Ceased WO2017147513A1 (fr)

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