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WO2017146756A1 - Codage de canal uci sur xpucch - Google Patents

Codage de canal uci sur xpucch Download PDF

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Publication number
WO2017146756A1
WO2017146756A1 PCT/US2016/035753 US2016035753W WO2017146756A1 WO 2017146756 A1 WO2017146756 A1 WO 2017146756A1 US 2016035753 W US2016035753 W US 2016035753W WO 2017146756 A1 WO2017146756 A1 WO 2017146756A1
Authority
WO
WIPO (PCT)
Prior art keywords
uci
harq
xpucch
ack
format
Prior art date
Application number
PCT/US2016/035753
Other languages
English (en)
Inventor
Joonyoung Cho
Gang Xiong
Glenn J. BRADFORD
Ajit Nimbalker
Original Assignee
Intel IP Corporation
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.)
Filing date
Publication date
Application filed by Intel IP Corporation filed Critical Intel IP Corporation
Priority to CN201680079895.XA priority Critical patent/CN108604954A/zh
Publication of WO2017146756A1 publication Critical patent/WO2017146756A1/fr
Priority to HK19100727.9A priority patent/HK1258357A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0072—Error control for data other than payload data, e.g. control data
    • H04L1/0073—Special arrangements for feedback channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • 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
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals

Definitions

  • Embodiments pertain to wireless communications. Some embodiments relate to fifth generation (5G) systems and radio access network 1 (RANI). Some embodiments relate to uplink control information (UCI) channel coding on 5G physical uplink control channel (xPUCCH).
  • 5G fifth generation
  • RANI radio access network 1
  • UCI uplink control information
  • xPUCCH 5G physical uplink control channel
  • a user equipment In a cellular network, a user equipment (UE) needs to
  • eNB evolved NodeB
  • UCI uplink control information
  • PUCCH physical uplink control channel
  • FIGS. 1 A-1B are block diagrams of time-division duplex (TDD) subframe structures in the downlink (DL) in accordance with some aspects
  • FIG. 2 is a functional diagram of a wireless network in accordance with some embodiments.
  • FIG. 3 illustrates components of a communication device in accordance with some embodiments.
  • FIG. 4 illustrates a block diagram of a communication device in accordance with some embodiments.
  • FIG. 5 illustrates another block diagram of a communication device in accordance with some embodiments.
  • FIG. 6 illustrates a processing for 5G physical uplink control channel (xPUCCH) formats la, lb, 2, and 3 in accordance with some embodiments.
  • xPUCCH physical uplink control channel
  • FIG. 7 illustrates a processing for 5G physical uplink control channel (xPUCCH) format 4 in accordance with some embodiments.
  • FIG. 8 is a flow chart of a method for uplink control information (UCI) channel coding on 5G physical uplink control channel (xPUCCH) in accordance with some embodiments.
  • UCI uplink control information
  • 5G fifth generation wireless communication network system
  • 3 GPP third generation partnership project
  • LTE long-term evolution
  • RATs new radio access technologies
  • FIGS. 1 A-1B are block diagrams of time-division duplex (TDD) subframe structures 100 A and 100B in the downlink (DL) in accordance with some embodiments.
  • Subframe structure 100A of FIG. 1 A is a low latency structure
  • subframe structure 100B of FIG. IB is a high throughput structure.
  • subframe structure 100 A includes 5G physical downlink control channel (xPDCCH) 11 OA, 5G physical downlink shared channel (xPDSCH) 120A, guard time (GT) 130A, and 5G physical uplink control channel (xPUCCH) 140A.
  • the blocks 110A, 120A, 130A, and 140A are within a single subframe 150A.
  • subframe structure 100B includes, similarly to subframe structure 100A, xPDCCH HOB, xPDSCH 120B, GT 130B, and xPUCCH 140B.
  • subframe structure 100B the blocks 110A, 120 A, 130A, and 140 A are divided between two subframes 150B-1 and 150B-2.
  • Subframe 150B-1 includes xPDCCH HOB and part of xPDSCH 120B.
  • Subframe 150B-2 includes the remaining part of xPDSCH 120B, GT 130B, and xPUCCH 140B.
  • FIGS. 1 A-1B illustrate two types of self-contained TDD subframe structures 100A/100B in the DL.
  • xPDSCH 120A/120B is scheduled by xPDCCH 1 lOA/110B and is transmitted right after the xPDCCH 11 OA/110B.
  • the GT 13 OA/130B either is or is not inserted between xPDSCH 120A/120B and xPUCCH 140A/140B in order to accommodate the DL to uplink (UL) and UL to DL switching time and round- trip propagation delay.
  • two or more subframes 150B-1 and 150B-2 can be aggregated for one xPDSCH 120B transmission for a user equipment (UE) (e.g., as discussed in conjunction with FIG. 2).
  • UE user equipment
  • the xPDSCH 120B spans two subframes 150B-1 and 150B-2.
  • the GT 130B is inserted in the second subframe 150B-2.
  • GT overhead can be reduced by half compared to the low latency structure 100 A of FIG. 1A.
  • additional xPDCCH in addition to xPDCCH HOB is inserted into the subframe 150B-2 to allow the same subframe scheduling for the DL data channel transmission.
  • the subframe structure 100B spans two subframes 150B-1 and 150B-2. However, in some cases, the subframe structure 100B spans more than two subframes, with the xPDSCH 120B expanding across the additional subframes.
  • PUCCH is transmitted in a frequency region on the edges of the system bandwidth.
  • PUCCH and physical uplink shared channel (PUSCH) are multiplexed in a frequency division multiplexing (FDM) manner.
  • FDM frequency division multiplexing
  • xPUCCH 11 OA/110B and data channel are multiplexed in a time division multiplexing (TDM) manner.
  • uplink control information includes hybrid automatic repeat request (HARQ) acknowledgment/ no acknowledgement (ACK/NACK) feedback, or channel state information (CSI) reports (e.g., channel quality indicator (CQI), pre-coding matrix indicator (PMI), and rank indicator (RI)), depending on different payload sizes
  • HARQ hybrid automatic repeat request
  • ACK/NACK acknowledgment/ no acknowledgement
  • CSI channel state information
  • CQI channel quality indicator
  • PMI pre-coding matrix indicator
  • RI rank indicator
  • different xPUCCH formats are defined.
  • the subject technology proposes detailed xPUCCH formats to carry UCI with various payload sizes.
  • xPUCCH is used to carry uplink control information, which may include scheduling request, HARQ ACK/NACK feedback, CSI report and beam related information.
  • uplink control information which may include scheduling request, HARQ ACK/NACK feedback, CSI report and beam related information.
  • various xPUCCH formats can be defined.
  • xPUCCH format 1/la/lb is used to carry scheduling request and 1 or 2 bit HARQ ACK/NACK feedback.
  • xPUCCH format 2 is used to carry scheduling request, HARQ ACK/NACK feedback for multiple HARQ processes, CSI report and/or beam related information.
  • the payload size is between 3 and 13 bits.
  • xPUCCH format 3 is used to carry scheduling request, HARQ ACK/NACK feedback for multiple HARQ processes, CSI report and/or beam related information.
  • the payload size is between 3 and 22 bits.
  • xPUCCH format 4 is used to carry scheduling request, HARQ ACK/NACK feedback for multiple HARQ processes, CSI report and/or beam related information.
  • the payload size is greater than 22 bits.
  • one physical resource block group correspond to six physical resource blocks (PRB), which is a minimum resource unit for xPUCCH transmission.
  • the eNode B eNB may schedule the UE to transmit the xPUCCH using one or multiple RBGs according to the indication in the downlink control information (DCI).
  • DCI downlink control information
  • the physical uplink control channel, xPUCCH carries uplink control information.
  • the xPUCCH is transmitted in the last symbol of a subframe. All xPUCCH formats use a cyclic shift, n c c f l (n s ) , which varies with the slot number n s according to Equation 1.
  • n c ° is a cell specific cyclic shift value; is the number of symbols in one slot; n s is the slot number within one frame.
  • n s can be ranged from 0 to 99.
  • c(i) is a pseudo-random sequence.
  • the physical uplink control channel supports multiple formats as shown in Table 1.
  • the modulation scheme QPSK refers to quadrature phase-shift keying
  • the modulation scheme BPSK refers to binary phase- shift keying
  • xPUCCH format 1/1 a/lb is used to carry scheduling request and 1 or 2 bit HARQ ACK/NACK feedback.
  • the detailed design for xPUCCH format 1/la/lb is provided below.
  • multiple UEs can be multiplexed in a code division multiplexing (CDM) manner. Further, in the case when UE is configured with two antenna ports, Zadoff-Chu (ZC) sequence with different cyclic shift values on each AP is applied to achieve transmit diversity.
  • CDM code division multiplexing
  • cell specific and UE specific cyclic shift values are applied for ZC sequence, where UE specific cyclic shift value can be configured by higher layers via RRC signalling or indicated in the DCI via xPDCCH.
  • d(0) 1 for xPUCCH format 1.
  • Table 2 Modulation symbol d(0) for xPUCCH.
  • Equation 2 y (p) ⁇ ri) is the modulated symbols; P is the number of antenna ports; p is the antenna port index; d(0) is the input symbol;
  • Equation 2 r 1 )" ?, ( «) is defined with M, PUCCH
  • Equation 3 The antenna-port specific cyclic shift p varies between slots as defined in Equation 3.
  • Equation 3 p is the cyclic shift; n s is the slot number within one frame; p is the antenna port index; P is the number of antenna ports; N, RB sc is the number of subcarriers in one resource block (RB).
  • RB resource block
  • N xPUCCH is the number of RBs for one xPUCCH transmission;
  • z p) is the transmitted data mapped to the corresponding xPUCCH resource;
  • y (p) is the modulated symbols for xPUCCH;
  • k is the modulated symbol index.
  • multiple UEs are multiplexed in a frequency division multiplexing (FDM) manner using assigned RBGs.
  • FDM frequency division multiplexing
  • d(0) 1 is assumed for xPUCCH format 1.
  • Table 3 Modulation symbol d(0) for xPUCCH.
  • Equation 6 is the modulated symbols; P is the number of antenna ports; p is the antenna port index; d(0) is the input symbol.
  • Equation 6 r equation 6
  • ⁇ s s p eq CCH .
  • the antenna- port specific cyclic shift a ⁇ is defined by Equation 7.
  • Equation 7 [0044] In Equation 7, p is the cyclic shift; n s is the slot number within one frame; p is the antenna port index; P is the number of antenna ports; N B is the number of subcarriers in one resource block (RB). Furthermore, in Equation 7, p is the cyclic shift; n s is the slot number within one frame; p is the antenna port index; P is the number of antenna ports; N B is the number of subcarriers in one resource block (RB). Furthermore, in Equation 7, p is the cyclic shift; n s is the slot number within one frame; p is the antenna port index; P is the number of antenna ports; N B is the number of subcarriers in one resource block (RB). Furthermore, in Equation 7, p is the cyclic shift; n s is the slot number within one frame; p is the antenna port index; P is the number of antenna ports; N B is the number of subcarriers in one resource block (RB). Furthermore, in Equation 7, p is
  • Equation 7 " cs e ⁇ is configured by higher layers.
  • the block of complex- valued symbols y is mapped to z according to Equation 8.
  • N x R P u CCH is the number of RBs for one xPUCCH transmission;
  • z (p) is the transmitted data mapped to the corresponding xPUCCH resource;
  • y (p) is the modulated symbols for xPUCCH;
  • k is the modulated symbol index.
  • resource index ⁇ ccu ⁇ w hich is configured by higher layers.
  • xPUCCH format 2 and 3 can be used to carry scheduling request, HARQ ACK/NACK feedback for multiple HARQ processes, CSI report and/or beam related information.
  • xPUCCH format 2 can be used to carry uplink control information with payload size between 3 and 13 bits;
  • xPUCCH format 3 can be used to carry uplink control information with payload size between 3 and 22 bits;
  • xPUCCH format 4 can be used to carry uplink control information with payload size greater than 22 bits.
  • space frequency block code SFBC
  • cell specific cyclic shift can be applied for the xPUCCH transmission in order to randomize the inter-cell interference.
  • the block of bits b (° -MM blt - 1) shall be scrambled with a UE-specific scrambling sequence, resulting in a block of scrambled bits 6 (0),..., ⁇ ( bit -1) accorc j m g ⁇ 0 Equation 9.
  • Equation 9 c(i) is the scrambling sequence.
  • the scrambling sequence generator is initialized with Equation 10 at the start of each subframe.
  • n s is the slot number within one frame; N ⁇ 1 is the physical cell ID; n Rmi is the Cell Radio Network Temporary Identifier (C- RNTI).
  • C- RNTI Cell Radio Network Temporary Identifier
  • the block of scrambled bits b ( ),...,b (M blt -1) ig Q uadrature Phase shift Keying (QPSK) modulated, resulting in a block of complex -valued modulation symbols d ⁇ - d M ⁇ ⁇ ⁇ where M ⁇ ** M ⁇ 2 .
  • ⁇ is the number of layers and symb is the number of modulation symbols per layer.
  • precoding is used.
  • the precoder takes as input a
  • precoding For transmission on a single antenna port, precoding is defined by
  • Equation 13 " ⁇ " ' symb with symb symb .
  • the mapping to resource elements is defined by operations on quadruplets of complex-valued symbols.
  • Equation 14 [0061]
  • N x R P u CCH is the number of RBs for one xPUCCH transmission
  • z (p) is the transmitted data mapped to the corresponding xPUCCH resource
  • y (?) is the modulated symbols for xPUCCH
  • k is the modulated symbol index.
  • xPuccH i s configured by higher layers and indicated in the xPDCCH.
  • n VCCK n cm
  • ⁇ XPUCCH ⁇ XPUCCH > which is configured by higher layers and indicated in the xPDCCH.
  • per-resource element (RE) cyclic transmission mode are applied for xPUCCH format 2, 3 and 4 in the case where two APs are configured for UE.
  • the scrambling sequence generator is initialized with
  • RNTI is the cell-radio network temporary identifier (C-RNTI).
  • C-RNTI cell-radio network temporary identifier
  • QPSK quadrature phase-shift keying
  • Layer mapping is sometimes applied.
  • the complex -valued modulation symbols to be transmitted are mapped onto one or two layers.
  • symb is the number of modulation symbols per layer.
  • precoding is used.
  • the precoder takes
  • mapping and generates a block of vectors v ' " ' y J ,
  • precoding For transmission on a single antenna port, precoding is defined by Equation 16.
  • mapping to resource elements is defined by operations on quadruplets of complex- valued symbols. In some cases,
  • NTM uccii is the number of RBs for one xPUCCH transmission;
  • z (p) is the transmitted data mapped to the corresponding xPUCCH resource;
  • y (?) is the modulated symbols for xPUCCH;
  • k is the modulated symbol index.
  • Resources used for transmission of PUCCH format 2 are identified by a resource index H frfr°° mm wwhhiicchh tthhee PPRRBB ggrroouupp iinnddeexx '" and the comb index n c ⁇ ( omb b are determined according to Equation 19.
  • FIG. 2 shows an example of a portion of an end-to-end network architecture of a Long Term Evolution (LTE) network 200 with various components of the network in accordance with some embodiments.
  • LTE Long Term Evolution
  • the network 200 may comprise a radio access network (RAN) (e.g., as depicted, the E-UTRAN or evolved universal terrestrial radio access network) 201 and core network 220 (e.g., shown as an evolved packet core (EPC)) coupled together through an S I interface 215.
  • RAN radio access network
  • EPC evolved packet core
  • the network 200 includes the UE 202, which is configured to determine uplink control information for xPUCCH; and encode a transmission of the xPUCCH to carry the determined uplink control information to an allocated resource, wherein the determined uplink control information includes one or more of: scheduling request, hybrid automatic repeat request (HARQ) acknowledgment/ no acknowledgement (ACK/NACK) feedback, channel state information (CSI) reports, and beam related information.
  • HARQ hybrid automatic repeat request
  • ACK/NACK acknowledgment/ no acknowledgement
  • CSI channel state information
  • the UE 202 is configured to access a 5G physical uplink control channel (xPUCCH) format for transmitting uplink control information (UCI), wherein the xPUCCH format corresponds to a payload size of the xPUCCH; access the UCI, wherein data in the UCI comprises one or more of hybrid automatic repeat request (HARQ)
  • xPUCCH physical uplink control channel
  • HARQ hybrid automatic repeat request
  • the network 200 includes eNBs 204.
  • One or more of the eNBs 204 is configured to access xPUCCH from multiple user equipments (UEs), including a UE with two antenna ports; and multiplex the accessed xPUCCH, wherein, for the UE configured with the two antenna ports, a ZC sequence with a different cyclic shift value is applied on the xPUCCH received from each antenna port.
  • the UE 202 transmits xPUCCH to the eNB 204, which receives the xPUCCH from the UE 202.
  • the core network 220 may include a mobility management entity
  • the RAN 201 may include evolved node Bs (eNBs) 204 (which may operate as base stations) for communicating with user equipment (UE) 202.
  • eNBs 204 may include macro eNBs 204a and low power (LP) eNBs 204b.
  • the MME 222 may be similar in function to the control plane of legacy Serving GPRS Support Nodes (SGSN).
  • the MME 222 may manage mobility aspects in access such as gateway selection and tracking area list management.
  • the serving GW 224 may terminate the interface toward the RAN 201, and route data packets between the RAN 201 and the core network 220.
  • the serving GW 224 may be a local mobility anchor point for inter-eNB handovers and also may provide an anchor for inter-3GPP mobility. Other responsibilities may include lawful intercept, charging, and some policy enforcement.
  • the serving GW 224 and the MME 222 may be implemented in one physical node or separate physical nodes.
  • the PDN GW 226 may terminate a SGi interface toward the packet data network (PDN).
  • the PDN GW 226 may route data packets between the EPC 220 and the external PDN, and may perform policy enforcement and charging data collection.
  • the PDN GW 226 may also provide an anchor point for mobility devices with non-LTE access.
  • the external PDN can be any kind of IP network, as well as an IP Multimedia Subsystem (IMS) domain.
  • IMS IP Multimedia Subsystem
  • GW 226 and the serving GW 224 may be implemented in a single physical node or separate physical nodes.
  • the eNBs 204 may terminate the air interface protocol and may be the first point of contact for a UE 202. In some
  • an eNB 204 may fulfill various logical functions for the RAN 201 including, but not limited to, RNC (radio network controller functions) such as radio bearer management, uplink and downlink dynamic radio resource management and data packet scheduling, and mobility management.
  • RNC radio network controller functions
  • UEs 202 may be configured to communicate orthogonal frequency division multiplexed (OFDM) communication signals with an eNB 204 over a multicarrier communication channel in accordance with an OFDMA communication technique.
  • the OFDM signals may comprise a plurality of orthogonal subcarriers.
  • the SI interface 215 may be the interface that separates the RAN 201 and the EPC 220. It may be split into two parts: the Sl-U, which may carry traffic data between the eNBs 204 and the serving GW 224, and the SI -MME, which may be a signaling interface between the eNBs 204 and the MME 222.
  • the X2 interface may be the interface between eNBs 204.
  • the X2 interface may comprise two parts, the X2-C and X2-U.
  • the X2-C may be the control plane interface between the eNBs 204
  • the X2-U may be the user plane interface between the eNBs 204.
  • LP cells 204b may be typically used to extend coverage to indoor areas where outdoor signals do not reach well, or to add network capacity in areas with dense usage.
  • the cells of different sizes may operate on the same frequency band, or may operate on different frequency bands with each cell operating in a different frequency band or only cells of different sizes operating on different frequency bands.
  • LP eNB refers to any suitable relatively LP eNB for implementing a smaller cell (smaller than a macro cell) such as a femtocell, a picocell, or a microcell.
  • Femtocell eNBs may be typically provided by a mobile network operator to its residential or enterprise customers.
  • a femtocell may be typically the size of a residential gateway or smaller and generally connect to a broadband line.
  • the femtocell may connect to the mobile operator's mobile network and provide extra coverage in a range of typically 30 to 50 meters.
  • a LP eNB 204b might be a femtocell eNB since it is coupled through the PDN GW 226.
  • a picocell may be a wireless
  • a picocell eNB may generally connect through the X2 link to another eNB such as a macro eNB through its base station controller (BSC) functionality.
  • BSC base station controller
  • LP eNB may be implemented with a picocell eNB since it may be coupled to a macro eNB 204a via an X2 interface.
  • Picocell eNBs or other LP eNBs LP eNB 204b may incorporate some or all functionality of a macro eNB LP eNB 204a. In some cases, this may be referred to as an access point base station or enterprise femtocell.
  • the UE 202 may communicate with an access point (AP) 204c.
  • the AP 204c may use only the unlicensed spectrum (e.g., WiFi bands) to communicate with the UE 202.
  • the AP 204c may communicate with the macro eNB 204A (or LP eNB 204B) through an Xw interface.
  • the AP 204c may communicate with the UE 202 independent of communication between the UE 202 and the macro eNB
  • the AP 204c may be controlled by the macro eNB 204A and use LWA, as described in more detail below.
  • Communication over an LTE network may be split up into 10ms frames, each of which may contain ten 1ms subframes. Each subframe of the frame, in turn, may contain two slots of 0.5ms. Each subframe may be used for uplink (UL) communications from the UE to the e B or downlink (DL) communications from the eNB to the UE.
  • the eNB may allocate a greater number of DL communications than UL communications in a particular frame.
  • the eNB may schedule transmissions over a variety of frequency bands (fi and f 2 ).
  • Each slot of the subframe may contain 6-7 OFDM symbols, depending on the system used.
  • the subframe may contain 12 subcamers.
  • a downlink resource grid may be used for downlink transmissions from an eNB to a UE, while an uplink resource grid may be used for uplink transmissions from a UE to an eNB or from a UE to another UE.
  • the resource grid may be a time-frequency grid, which is the physical resource in the downlink in each slot.
  • the smallest time-frequency unit in a resource grid may be denoted as a resource element (RE).
  • Each column and each row of the resource grid may correspond to one OFDM symbol and one OFDM subcarrier, respectively.
  • the resource grid may contain resource blocks (RBs) that describe the mapping of physical channels to resource elements and physical RBs (PRBs).
  • a PRB may be the smallest unit of resources that can be allocated to a UE.
  • a resource block may be 180 kHz wide in frequency and 1 slot long in time. In frequency, resource blocks may be either 12 x 15 kHz subcarriers or 24 x 7.5 kHz subcarriers wide. For most channels and signals, 12 subcarriers may be used per resource block, dependent on the system bandwidth.
  • Frequency Division Duplexed (FDD) mode both the uplink and downlink frames may be 10ms and frequency (full-duplex) or time (half-duplex) separated.
  • FDD Frequency Division Duplexed
  • the uplink and downlink subframes may be transmitted on the same frequency and are multiplexed in the time domain.
  • the duration of the resource grid 400 in the time domain corresponds to one subframe or two resource blocks.
  • Each OFDM symbol may contain a cyclic prefix (CP) which may be used to effectively eliminate Inter Symbol Interference (ISI), and a Fast Fourier Transform (FFT) period.
  • CP cyclic prefix
  • ISI Inter Symbol Interference
  • FFT Fast Fourier Transform
  • the duration of the CP may be determined by the highest anticipated degree of delay spread. Although distortion from the preceding OFDM symbol may exist within the CP, with a CP of sufficient duration, preceding OFDM symbols do not enter the FFT period. Once the FFT period signal is received and digitized, the receiver may ignore the signal in the CP.
  • Each subframe may be partitioned into the PDCCH and the PDSCH.
  • the PDCCH may normally occupy the first two symbols of each subframe and carries, among other things, information about the transport format and resource allocations related to the PDSCH channel, as well as H-ARQ information related to the uplink shared channel.
  • the PDSCH may carry user data and higher layer signaling to a UE and occupy the remainder of the subframe.
  • downlink scheduling (assigning control and shared channel resource blocks to UEs within a cell) may be performed at the eNB based on channel quality information provided from the UEs to the eNB, and then the downlink resource assignment information may be sent to each UE on the PDCCH used for (assigned to) the UE.
  • the PDCCH may contain downlink control information (DCI) in one of a number of formats that indicate to the UE how to find and decode data, transmitted on PDSCH in the same subframe, from the resource grid.
  • DCI format may provide details such as number of resource blocks, resource allocation type, modulation scheme, transport block, redundancy version, coding rate etc.
  • Each DCI format may have a cyclic redundancy code (CRC) and be scrambled with a Radio Network Temporary Identifier (RNTI) that identifies the target UE for which the PDSCH is intended.
  • CRC cyclic redundancy code
  • RNTI Radio Network Temporary Identifier
  • Use of the UE- specific RNTI may limit decoding of the DCI format (and hence the
  • FIG. 3 illustrates components of a UE in accordance with some embodiments. At least some of the components shown may be used in an eNB or MME, for example, such as the UE 202 or e B 204 shown in FIG. 2.
  • the UE 300 and other components may be configured to use the synchronization signals as described herein.
  • the UE 300 may be one of the UEs 302 shown in FIG. 1 and may be a stationary, non-mobile device or may be a mobile device.
  • the UE 300 may include application circuitry 302, baseband circuitry 304, Radio Frequency (RF) circuitry 306, front-end module (FEM) circuitry 308 and one or more antennas 310, coupled together at least as shown. At least some of the baseband circuitry 304, RF circuitry 306, and FEM circuitry 308 may form a transceiver.
  • other network elements such as the eNB may contain some or all of the components shown in FIG. 3. Other of the network elements, such as the MME, may contain an interface, such as the SI interface, to communicate with the eNB over a wired connection regarding the UE.
  • the application or processing circuitry 302 may include one or more application processors.
  • the application circuitry 302 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 304 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the baseband circuitry 304 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 306 and to generate baseband signals for a transmit signal path of the RF circuitry 306.
  • Baseband processing circuity 304 may interface with the application circuitry 302 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 306.
  • the baseband circuitry 304 may include a second generation (2G) baseband processor 304a, third generation (3G) baseband processor 304b, fourth generation (4G) baseband processor 304c, and/or other baseband processor(s) 304d for other existing generations, generations in development or to be developed in the future (e.g., fifth generation (5G), 6G, etc.).
  • the baseband circuitry 304 e.g., one or more of baseband processors 304a-d
  • the radio control functions may include, but are not limited to, signal modulation/demodulation,
  • modulation/demodulation circuitry of the baseband circuitry 304 may include FFT, precoding, and/or constellation mapping/demapping functionality.
  • encoding/decoding circuitry of the baseband circuitry 304 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 304 may include elements of a protocol stack such as, for example, elements of an evolved universal terrestrial radio access network (E-UTRAN) 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.
  • E-UTRAN evolved universal terrestrial radio access network
  • a central processing unit (CPU) 304e of the baseband circuitry 304 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) 304f.
  • the audio DSP(s) 304f may be include elements for
  • the baseband circuitry 304 may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry 304 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
  • Embodiments in which the baseband circuitry 304 is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.
  • the device can be configured to operate in accordance with communication standards or other protocols or standards, including Institute of Electrical and Electronic Engineers (IEEE) 802.16 wireless technology (WiMax), IEEE 802.11 wireless technology (WiFi) including IEEE 802.11 ad, which operates in the 60 GHz millimeter wave spectrum, various other wireless technologies such as global system for mobile communications (GSM), enhanced data rates for GSM evolution (EDGE), GSM EDGE radio access network (GERAN), universal mobile telecommunications system (UMTS), UMTS terrestrial radio access network (UTRAN), or other 2G, 3G, 4G, 5G, etc. technologies either already developed or to be developed.
  • RF circuitry 306 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
  • the RF circuitry 306 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • RF circuitry 306 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 308 and provide baseband signals to the baseband circuitry 304.
  • RF circuitry 306 may also include a transmit signal path which may include circuitry to up-convert baseband signals provided by the baseband circuitry 304 and provide RF output signals to the FEM circuitry 308 for transmission.
  • the RF circuitry 306 may include a receive signal path and a transmit signal path.
  • the receive signal path of the RF circuitry 306 may include mixer circuitry 306a, amplifier circuitry 306b and filter circuitry 306c.
  • the transmit signal path of the RF circuitry 306 may include filter circuitry 306c and mixer circuitry 306a.
  • RF circuitry 306 may also include synthesizer circuitry 306d for synthesizing a frequency for use by the mixer circuitry 306a of the receive signal path and the transmit signal path.
  • the mixer circuitry 306a of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 308 based on the synthesized frequency provided by synthesizer circuitry 306d.
  • the amplifier circuitry 306b may be configured to amplify the down-converted signals and the filter circuitry 306c 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 304 for further processing.
  • the output baseband signals may be zero-frequency baseband signals, although this is not a requirement.
  • mixer circuitry 306a of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry 306a of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 306d to generate RF output signals for the FEM circuitry 308.
  • the baseband signals may be provided by the baseband circuitry 304 and may be filtered by filter circuitry 306c.
  • the filter circuitry 306c may include a low-pass filter (LPF), although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry 306a of the receive signal path and the mixer circuitry 306a 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 306a of the receive signal path and the mixer circuitry 306a 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 306a of the receive signal path and the mixer circuitry 306a may be arranged for direct downconversion and/or direct upconversion, respectively.
  • the mixer circuitry 306a of the receive signal path and the mixer circuitry 306a 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 306 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 304 may include a digital baseband interface to communicate with the RF circuitry 306.
  • 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 306d 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 306d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.
  • the synthesizer circuitry 306d may be configured to synthesize an output frequency for use by the mixer circuitry 306a of the RF circuitry 306 based on a frequency input and a divider control input.
  • the synthesizer circuitry 306d 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 304 or the applications processor 302 depending on the desired output frequency.
  • a divider control input (e.g., N) may be determined from a lookup table based on a channel indicated by the applications processor 302.
  • Synthesizer circuitry 306d of the RF circuitry 306 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 (DP A).
  • 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 306d may be configured to generate a carrier frequency as the output frequency, while in other embodiments, the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and divider circuitry to generate multiple signals at the carrier frequency with multiple different phases with respect to each other. In some embodiments, the output frequency may be a LO frequency (fix)). In some embodiments, the RF circuitry 306 may include an IQ/polar converter.
  • FEM circuitry 308 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 310, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 306 for further processing.
  • FEM circuitry 308 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 306 for transmission by one or more of the one or more antennas 310.
  • the FEM circuitry 308 may include a
  • 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 306).
  • the transmit signal path of the FEM circuitry 308 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 306), and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 310.
  • PA power amplifier
  • the UE 300 may include additional elements such as, for example, memory/storage, display, camera, sensor, and/or input/output (I/O) interface as described in more detail below.
  • the UE 300 described herein may be part of a portable wireless communication device, such as a personal digital assistant (PDA), a laptop or portable computer with wireless communication capability, a web tablet, a wireless telephone, a smartphone, a wireless headset, a pager, an instant messaging device, a digital camera, an access point, a television, a medical device (e.g., a heart rate monitor, a blood pressure monitor, etc.), or other device that may receive and/or transmit information wirelessly.
  • PDA personal digital assistant
  • a laptop or portable computer with wireless communication capability such as a personal digital assistant (PDA), a laptop or portable computer with wireless communication capability, a web tablet, a wireless telephone, a smartphone, a wireless headset, a pager, an instant messaging device, a digital camera, an access point, a television, a medical
  • the UE 300 may include one or more user interfaces designed to enable user interaction with the system and/or peripheral component interfaces designed to enable peripheral component interaction with the system.
  • the UE 300 may include one or more of a keyboard, a keypad, a touchpad, a display, a sensor, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, a power supply interface, one or more antennas, a graphics processor, an application processor, a speaker, a microphone, and other I/O components.
  • the display may be an LCD or LED screen including a touch screen.
  • the sensor may include a gyro sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit. The positioning unit may communicate with components of a positioning network, e.g., a global positioning system (GPS) satellite.
  • GPS global positioning system
  • the antennas 310 may comprise one or more directional or omnidirectional antennas, including, for example, dipole antennas, monopole antennas, patch antennas, loop antennas, microstrip antennas or other types of antennas suitable for transmission of RF signals.
  • the antennas 310 may be effectively separated to take advantage of spatial diversity and the different channel characteristics that may result.
  • the UE 300 is illustrated as having several separate functional elements, one or more of the functional elements may be combined and may be implemented by combinations of software-configured elements, such as processing elements including digital signal processors (DSPs), and/or other hardware elements.
  • processing elements including digital signal processors (DSPs), and/or other hardware elements.
  • DSPs digital signal processors
  • some elements may comprise one or more microprocessors, DSPs, field-programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), radio-frequency integrated circuits (RFICs) and combinations of various hardware and logic circuitry for performing at least the functions described herein.
  • the functional elements may refer to one or more processes operating on one or more processing elements.
  • Embodiments may be implemented in one or a combination of hardware, firmware and software. Embodiments may also be implemented as instructions stored on a computer-readable storage device, which may be read and executed by at least one processor to perform the operations described herein.
  • a computer-readable storage device may include any non-transitory mechanism for storing information in a form readable by a machine (e.g., a computer).
  • a computer-readable storage device may include read- only memory (ROM), random-access memory (RAM), magnetic disk storage media, optical storage media, flash-memory devices, and other storage devices and media.
  • Some embodiments may include one or more processors and may be configured with instructions stored on a computer-readable storage device.
  • FIG. 4 is a block diagram of a communication device in accordance with some embodiments.
  • the device may be a UE or eNB, for example, such as the UE 202 or eNB 204 shown in FIG. 2.
  • the physical layer circuitry 402 may perform various encoding and decoding functions that may include formation of baseband signals for transmission and decoding of received signals.
  • the communication device 400 may also include medium access control layer (MAC) circuitry 404 for controlling access to the wireless medium.
  • MAC medium access control layer
  • the communication device 400 may also include processing circuitry 406, such as one or more single-core or multi-core processors, and memory 408 arranged to perform the operations described herein.
  • the physical layer circuitry 402, MAC circuitry 404 and processing circuitry 406 may handle various radio control functions that enable communication with one or more radio networks compatible with one or more radio technologies.
  • the radio control functions may include signal modulation, encoding, decoding, radio frequency shifting, etc.
  • communication may be enabled with one or more of a WMAN, a WLAN, and a WPAN.
  • the communication device 400 can be configured to operate in accordance with 3 GPP standards or other protocols or standards, including WiMax, WiFi, WiGig, GSM, EDGE, GERAN, UMTS, UTRAN, or other 3G, 3G, 4G, 5G, etc. technologies either already developed or to be developed.
  • the communication device 400 may include transceiver circuitry 412 to enable communication with other external devices wirelessly and interfaces 414 to enable wired communication with other external devices.
  • the transceiver circuitry 412 may perform various transmission and reception functions such as conversion of signals between a baseband range and a Radio Frequency (RF) range.
  • RF Radio Frequency
  • the antennas 401 may comprise one or more directional or omnidirectional antennas, including, for example, dipole antennas, monopole antennas, patch antennas, loop antennas, microstrip antennas or other types of antennas suitable for transmission of RF signals.
  • the antennas 401 may be effectively separated to take advantage of spatial diversity and the different channel characteristics that may result.
  • the communication device 400 is illustrated as having several separate functional elements, one or more of the functional elements may be combined and may be implemented by combinations of software-configured elements, such as processing elements including DSPs, and/or other hardware elements. For example, some elements may comprise one or more
  • the functional elements may refer to one or more processes operating on one or more processing elements.
  • Embodiments may be implemented in one or a combination of hardware, firmware and software. Embodiments may also be implemented as instructions stored on a computer- readable storage device, which may be read and executed by at least one processor to perform the operations described herein.
  • FIG. 5 illustrates another block diagram of a communication device 500 in accordance with some embodiments.
  • the communication device 500 may correspond to the UE 202 or the eNB 204.
  • the communication device 500 may operate as a standalone device or may be connected (e.g., networked) to other communication devices.
  • the communication device 500 may operate in the capacity of a server communication device, a client communication device, or both in server- client network environments.
  • the communication device 500 may act as a peer communication device in peer-to-peer (P2P) (or other distributed) network environment.
  • P2P peer-to-peer
  • the communication device 500 may be a UE, eNB, PC, a tablet PC, a STB, a PDA, a mobile telephone, a smart phone, a web appliance, a network router, switch or bridge, or any communication device capable of executing instructions (sequential or otherwise) that specify actions to be taken by that communication device.
  • the term "communication device” shall also be taken to include any collection of communication devices that individually or jointly execute a set (or multiple sets) of instructions to perform any one or more of the methodologies discussed herein, such as cloud computing, software as a service (SaaS), other computer cluster configurations.
  • 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 communication device readable medium.
  • the software when executed by the underlying hardware of the module, 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 different instance of time.
  • Communication device 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.
  • a hardware processor 502 e.g., a central processing unit (CPU), a graphics processing unit (GPU), a hardware processor core, or any combination thereof
  • main memory 504 e.g., main memory
  • static memory 506 e.g., static memory
  • communication device 500 may further include a display unit 510, an
  • the communication device 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 521, such as a global positioning system (GPS) sensor, compass, accelerometer, or other sensor.
  • a storage device e.g., drive unit
  • a signal generation device 518 e.g., a speaker
  • a network interface device 520 e.g., a network interface device 520
  • sensors 521 such as a global positioning system (GPS) sensor, compass, accelerometer, or other sensor.
  • GPS global positioning system
  • the communication device 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
  • NFC near field communication
  • the storage device 516 may include a communication device 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 communication device 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 communication device readable media.
  • the term "communication device 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.
  • the term "communication device readable medium” may include any medium that is capable of storing, encoding, or carrying instructions for execution by the communication device 500 and that cause the communication device 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 communication device readable medium examples may include solid-state memories, and optical and magnetic media.
  • Specific examples of communication device 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;
  • communication device readable media may include non-transitory communication device readable media.
  • communication device readable media may include communication device 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
  • the network interface device 520 may wirelessly communicate using Multiple User MFMO techniques.
  • transmission medium shall be taken to include any intangible medium that is capable of storing, encoding or carrying instructions for execution by the communication device 500, and includes digital or analog communications signals or other intangible medium to facilitate communication of such software.
  • FIG. 6 illustrates a processing 600 xPUCCH formats la, lb, 2, and 3 in accordance with some embodiments.
  • the processing 600 takes place at the UE 202.
  • data arrives to the coding unit (e.g., of the UE 202) in the form of indicators for HARQ-ACK, channel quality information, beam measurement indication and scheduling request.
  • the coding unit e.g., of the UE 202
  • HARQ-ACK transmitted on xPUCCH format la/lb and for at least one or combination of HARQ-ACK, channel quality information (CQI and/or PMI), beam related information, and rank indicator transmitted on xPUCCH format 2 or format 3.
  • CQI and/or PMI channel quality information
  • beam related information beam related information
  • rank indicator transmitted on xPUCCH format 2 or format 3.
  • FIG. 7 illustrates a processing 700 for 5G physical uplink control channel (xPUCCH) format 4 in accordance with some embodiments.
  • the processing 700 takes place at the UE 202.
  • the processing 700 of FIG. 7 can be used for the case where A > 22, and at least one of channel quality indicator (CQI), precoding matrix indicator (PMI), beam related information, and rank indicator are transmitted on xPUCCH format 3 or xPUCCH format 4.
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • rank indicator rank indicator
  • the UE 202 attaches cyclic redundancy check (CRC) bits to a sequence of HARQ-ACK and channel quality information (CQI) bits (ao. . . aA-i) to obtain a CRC attached bit sequence (c 0 ... CK- i).
  • CRC cyclic redundancy check
  • the UE 202 applies channel coding to said CRC attached bit sequence (c 0 ... CK-I) to obtain a coded bit sequence (d (1 Y ..d (1) D-i).
  • the UE 202 applies rate matching to said coded bit sequence (d (1 Y .. d (1) D-i) to obtain a rate matched bit sequence (e 0 ... eE-i).
  • HARQ-ACK bits are received from higher layers for each subframe.
  • HARQ-ACK consists of 1-bit of information, i.e., or 2-bits of information, i.e., ⁇ 0 ' ⁇ 1 with corresponding to ACK/NACK bit for code word
  • each positive acknowledgement (ACK) is encoded as a binary T and each negative acknowledgement (NACK) is encoded as a binary ' ⁇ '.
  • ACK positive acknowledgement
  • NACK negative acknowledgement
  • the HARQ-ACK feedback consists of the concatenation of HARQ- ACK bits which the UE needs to feedback for downlink subframes.
  • 1 bit of HARQ-ACK information, " k , is used for that cell.
  • 2 bits of HARQ-ACK information are used for those cells, i.e., ⁇ * ' ⁇ *+ ⁇ with 3 ⁇ 4 corresponding to HARQ-ACK bit for code word 0 and ° k+l corresponding to that for code word 1.
  • the HARQ- ACK bits are processed for transmission.
  • A/N is the number of HARQ-ACK bits when xPUCCH format 2 is used for transmission of HARQ-ACK feedback.
  • sequence of bits N * ⁇ » 1 is obtained from the HARQ-ACK bits for different downlink subframes.
  • c is the number of downlink subframes for which the UE needs to feedback HARQ-ACK bits in cell c.
  • the number of HARQ-ACK bits for the UE to convey is computed using the following pseudocode.
  • PUCCHtormat2 is encoded according to Equation 20.
  • Table 4 Basis sequences for (32, O) code.
  • B and NTM can take other values.
  • the output bit sequence b 0 ,b l ,b 2 ,...,,b B _ l where B 8 ⁇ N B is obtained by the alternate concatenation of the bit sequences ⁇ ... ⁇ ⁇ and b 0 ,b b 2 ,...,,b 3l as set forth in the following pseudocode.
  • the channel quality bits input to the channel coding block are denoted by a ° ' fll ' ° 2 ' ° 3 '-' ° A - 1 where A is the number of bits.
  • the number of channel quality bits depends on the transmission format for wideband reports.
  • the channel quality information can be coded using a (20, A) code.
  • the code words of the (20, A) code are a linear combination of the 13 basis sequences denoted Mi >n and defined in Table 5.
  • Table 5 Basis sequences for (20, ,4) code.
  • bits After encoding the bits are denoted by b 0 ,b l ,b 2 ,...,,b l9 according to Equation 23.
  • Table 6 shows some examples of fields and corresponding bit widths for the channel quality information feedback for wideband reports for 15 PDSCH transmissions.
  • the fields include beam indicator (BI), rank indication (RI), wideband precoding matrix indicator (PMI), and wideband channel quality indicator (CQI).
  • Table 6 Fields for CQI feedback for wideband CQI reports.
  • FIG. 8 is a flow chart of a method 800 for UCI channel coding on xPUCCH in accordance with some embodiments.
  • the method 800 is implemented at the UE 202 of FIG. 2.
  • the method 800 begins at operation 810, where the UE 202 accesses an xPUCCH format for transmitting UCI.
  • the xPUCCH format corresponds to a payload size of the xPUCCH.
  • the xPUCCH format is one of xPUCCH formats 1, la, lb, 2, 3, and 4.
  • the UE 202 accesses the UCI.
  • Data in the UCI includes HARQ-ACK.
  • data in the UCI may also include one or more of SR, CQI, PMI, RI, and BI.
  • the UE 202 codes the UCI based on the data in the UCI and the xPUCCH format. After operation 830, the method 800 ends.
  • Example 1 is an apparatus of a user equipment (UE), the apparatus comprising: processing circuitry and memory, the processing circuitry to: access a 5G physical uplink control channel (xPUCCH) format for transmitting uplink control information (UCI), wherein the xPUCCH format corresponds to a payload size of the xPUCCH; access the UCI, wherein data in the UCI comprises one or more of hybrid automatic repeat request (HARQ) acknowledgment (ACK), scheduling request (SR), channel quality indicator (CQI), precoding matrix indicator (PMI), rank indication (RI), and beam indicator (BI); and code the UCI based on the data in the UCI and the xPUCCH format.
  • HARQ hybrid automatic repeat request
  • ACK acknowledgment
  • SR scheduling request
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • RI rank indication
  • BI beam indicator
  • Example 2 the subject matter of Example 1 optionally includes that the xPUCCH format comprises one of xPUCCH format 1, 1a, and lb, and wherein the UCI comprises HARQ-ACK; and the processing circuitry, in coding the UCI, applies channel coding to a sequence of HARQ-ACK bits (ao... aA-i) to obtain a coded output bit sequence (bo... bB-i).
  • Example 3 the subject matter of Example 1 optionally includes that the xPUCCH format comprises xPUCCH format 2, and the UCI comprises HARQ-ACK; the processing circuitry, in coding the UCI, is configured to: determine a number of downlink subframes for which the UE feedbacks HARQ-ACK bits to a cell c; set a HARQ-ACK bit counter (k) to 0; for each downlink subframe in the number of downlink subframes: increment the HARQ-ACK bit counter (k) by 1 if a transmission mode configured is 1 : 1 HARQ-ACK feedback for the cell c, or increment the HARQ-ACK bit counter (k) by 2 if a transmission mode configured is not 1 : 1 HARQ-ACK feedback for the cell c; and code the UCI based on a final value of the HARQ-ACK bit counter (k).
  • Example 4 the subject matter of Example 3 optionally includes that the processing circuitry, in coding the UCI, is configured further to: determine that the HARQ-ACK bit counter (k) is less than or equal to 22; upon determining that the HARQ-ACK bit counter (k) is less than or equal to 22, for each downlink subframe in the number of downlink subframes: transmit one downlink packet in the downlink subframe in a case where a transmission mode is 1 : 1 bit HARQ-ACK feedback; and transmit two downlink packets in the downlink subframe in a case where the transmission mode is not 1 : 1 bit HARQ- ACK feedback.
  • Example 5 the subject matter of Example 1 optionally includes that the xPUCCH format comprises one of xPUCCH format 2, and 3; and the processing circuitry, in coding the UCI, applies channel coding to a sequence of hybrid automatic repeat request (HARQ) acknowledgment (ACK) and CQI bits (ao... aA-i) to obtain the coded output bit sequence (bo... bB-i).
  • HARQ hybrid automatic repeat request
  • ACK hybrid automatic repeat request
  • CQI bits ao... aA-i
  • Example 6 the subject matter of Example 1 optionally includes that the xPUCCH format comprises xPUCCH format 4; and the processing circuitry, in coding the UCI, is configured to: attach cyclic redundancy check (CRC) bits to a sequence of HARQ-ACK and channel quality information (CQI) bits (ao... aA-i) to obtain a CRC attached bit sequence (c 0 ... CK- i); apply channel coding to said CRC attached bit sequence (c 0 ... CK-I) to obtain a coded bit sequence (d (1 Y .. d (1) D-i); and apply rate matching to said coded bit sequence (d (1 Y .. d (1) D-i) to obtain a rate matched bit sequence (e 0 ... eE-i).
  • CRC cyclic redundancy check
  • CQI channel quality information
  • Example 7 the subject matter of any of Examples 2, 3, 5, and
  • At least one of the UCI bits comprises information to indicate decoding results for a receive data, radio channel status information, or preferred beam direction information.
  • Example 8 the subject matter of any of Examples 5-6 optionally includes that the processing circuitry to: compute a code word as a linear combination of a plurality of stored sequences; and code the UCI bits using the code word.
  • Example 9 the subject matter of Example 1 optionally includes that the processing circuitry to code the UCI for transmission to an evolved NodeB (e B) using an error correcting coding technique.
  • e B evolved NodeB
  • Example 10 the subject matter of Example 1 optionally includes that the xPUCCH format comprises one of xPUCCH formats 1, la, lb, 2, 3, and 4.
  • Example 11 the subject matter of Example 1 optionally includes that the UCI comprises HARQ-ACK and SR, and wherein the SR bits are appended after the HARQ-ACK bits in the UCI.
  • Example 12 the subject matter of any of Examples 1, 2, 3, 5, and 6 optionally includes transceiver circuitry to transmit the xPUCCH; and an antenna coupled with the transceiver circuitry.
  • Example 13 the subject matter of any of Examples 1, 2, 3, 5, and 6 optionally includes that the processing circuitry comprises a baseband processor.
  • Example 14 is a machine-readable medium storing instructions which, when executed by processing circuitry of a user equipment (UE), cause the processing circuitry to: access a 5G physical uplink control channel (xPUCCH) format for transmitting uplink control information (UCI), wherein the xPUCCH format corresponds to a payload size of the xPUCCH; access the UCI, wherein data in the UCI comprises hybrid automatic repeat request (HARQ) acknowledgment (ACK); and code the UCI based on the data in the UCI and the xPUCCH format.
  • HARQ hybrid automatic repeat request
  • Example 15 the subject matter of Example 14 optionally includes that the xPUCCH format comprises one of xPUCCH format 1, 1a, and lb; and the processing circuitry, in coding the UCI, applies channel coding to a sequence of HARQ-ACK bits (ao . . . aA-i) to obtain a coded output bit sequence
  • Example 16 the subject matter of Example 14 optionally includes that the xPUCCH format comprises xPUCCH format 2.
  • the processing circuitry, in coding the UCI is configured to: determine a number of downlink subframes for which the UE feedbacks HARQ-ACK bits to a cell c; set a HARQ-ACK bit counter (k) to 0; for each downlink subframe in the number of downlink subframes: increment the HARQ-ACK bit counter (k) by 1 if a transmission mode configured is 1 : 1 HARQ-ACK feedback for the cell c, or increment the HARQ-ACK bit counter (k) by 2 if a transmission mode configured is not 1 : 1 HARQ-ACK feedback for the cell c; and code the UCI based on a final value of the HARQ-ACK bit counter (k).
  • Example 17 the subject matter of Example 16 optionally includes that the processing circuitry, in coding the UCI, is configured further to: determine that the HARQ-ACK bit counter (k) is less than or equal to 22; upon determining that the HARQ-ACK bit counter (k) is less than or equal to 22, for each downlink subframe in the number of downlink subframes: transmit one downlink packet in the downlink subframe in a case where a transmission mode is 1 : 1 bit HARQ-ACK feedback; and transmit two downlink packets in the downlink subframe in a case where the transmission mode is not 1 : 1 bit HARQ- ACK feedback.
  • Example 18 the subject matter of Example 14 optionally includes that the xPUCCH format comprises one of xPUCCH format 2, and 3; and the processing circuitry, in coding the UCI, applies channel coding to a sequence of HARQ-ACK and channel quality information (CQI) bits (ao . . . aA-i) to obtain the coded output bit sequence (bo . . . bB-i).
  • CQI channel quality information
  • Example 19 the subject matter of Example 14 optionally includes that the xPUCCH format comprises xPUCCH format 4; and the processing circuitry, in coding the UCI, is configured to: attach cyclic redundancy check (CRC) bits to a sequence of HARQ-ACK and channel quality information (CQI) bits (ao. . . aA-i) to obtain a CRC attached bit sequence (c 0 ... CK- i); apply channel coding to said CRC attached bit sequence (co. . . CK-I) to obtain a coded bit sequence (d (1 Y .. d (1) D-i); and apply rate matching to said coded bit sequence (d (1 Y .. d (1) D-i) to obtain a rate matched bit sequence (e 0 ... eE-i).
  • CRC cyclic redundancy check
  • CQI channel quality information
  • Example 20 the subject matter of Example 19 optionally includes that at least one of the UCI bits comprises information to indicate decoding results for a receive data, radio channel status information, or preferred beam direction information.
  • Example 21 the subject matter of Example 19 optionally includes that the processing circuitry is configured to: compute a code word as a linear combination of a plurality of stored sequences; and code the UCI bits using the code word.
  • Example 22 the subject matter of Example 14 optionally includes that the processing circuitry is configured to code the UCI for transmission to an evolved NodeB (eNB) using an error correcting coding technique.
  • eNB evolved NodeB
  • Example 23 the subject matter of Example 14 optionally includes that the UCI comprises HARQ-ACK and SR, and wherein the SR bits are appended after the HARQ-ACK bits in the UCI.
  • Example 24 is an apparatus of a user equipment (UE), the apparatus comprising: processing circuitry and memory, the processing circuitry to: access a 5G physical uplink control channel (xPUCCH) format for transmitting uplink control information (UCI), wherein the xPUCCH comprises one of xPUCCH formats 1, la, lb, 2, 3, and 4; access the UCI, wherein data in the UCI comprises one or more of hybrid automatic repeat request (HARQ) acknowledgment (ACK), scheduling request (SR), channel quality indicator (CQI), precoding matrix indicator (PMI), rank indication (RI), and beam indicator (BI); and code the UCI based on the data in the UCI and the xPUCCH format.
  • HARQ hybrid automatic repeat request
  • ACK acknowledgment
  • SR scheduling request
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • RI rank indication
  • BI beam indicator
  • Example 25 is an apparatus of a user equipment (UE), the apparatus comprising: means for accessing a 5G physical uplink control channel (xPUCCH) format for transmitting uplink control information (UCI), wherein the xPUCCH format corresponds to a payload size of the xPUCCH; means for accessing the UCI, wherein data in the UCI comprises hybrid automatic repeat request (HARQ) acknowledgment (ACK) and one or more of scheduling request (SR), channel quality indicator (CQI), precoding matrix indicator (PMI), rank indication (RI), and beam indicator (BI); and means for coding the UCI based on the data in the UCI and the xPUCCH format.
  • HARQ hybrid automatic repeat request
  • SR scheduling request
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • RI rank indication
  • BI beam indicator
  • Example 26 the subject matter of Example 1 optionally includes that the processing circuitry is to code the UCI based on the data in the UCI and the xPUCCH format by encoding the UCI based on the data in the UCI and the xPUCCH format.
  • code and “encode” encompass their plain and ordinary meaning and may be used interchangeably.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de l'invention concernent le codage de canal d'informations de commande de liaison montante (UCI) sur un canal de commande de liaison montante physique 5G (xPUCCH). Un équipement d'utilisateur (UE) comprend un circuit de traitement et une mémoire. Le circuit de traitement accède à un format de xPUCCH pour transmettre l'UCI. Le format de xPUCCH correspond à une taille de charge utile du xPUCCH. Le circuit de traitement accède à l'UCI. Les données dans l'UCI contiennent un ou plusieurs des éléments suivants : confirmation (ACK) de demande de répétition automatique hybride (HARQ), demande d'ordonnancement (SR), indicateur de qualité de canal (CQI), indicateur de matrice de précodage (PMI), indication de rang (RI) et indicateur de faisceau (BI). Le circuit de traitement code l'UCI en se basant sur les données dans l'UCI et le format du xPUCCH.
PCT/US2016/035753 2016-02-24 2016-06-03 Codage de canal uci sur xpucch WO2017146756A1 (fr)

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CN201680079895.XA CN108604954A (zh) 2016-02-24 2016-06-03 xPUCCH上的UCI信道编码
HK19100727.9A HK1258357A1 (zh) 2016-02-24 2019-01-16 Xpucch上的uci信道編碼

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