WO2018229727A1 - Envoi d'instructions dans un canal de commande de liaison descendante - Google Patents

Envoi d'instructions dans un canal de commande de liaison descendante Download PDF

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Publication number
WO2018229727A1
WO2018229727A1 PCT/IB2018/054433 IB2018054433W WO2018229727A1 WO 2018229727 A1 WO2018229727 A1 WO 2018229727A1 IB 2018054433 W IB2018054433 W IB 2018054433W WO 2018229727 A1 WO2018229727 A1 WO 2018229727A1
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Prior art keywords
command
csi
semi
wireless device
switching
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PCT/IB2018/054433
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English (en)
Inventor
Shiwei Gao
Sebastian FAXÉR
Mattias Frenne
Stephen Grant
Robert Mark Harrison
Siva Muruganathan
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Telefonaktiebolaget Lm Ericsson (Publ)
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Publication of WO2018229727A1 publication Critical patent/WO2018229727A1/fr

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    • 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 signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • This disclosure relates to wireless communication networks and in particular to sending commands in a downlink control channel.
  • Next generation mobile wireless communication systems referred to generally as “5G” or “new radio” (NR) will support a diverse set of use cases and a diverse set of deployment scenarios.
  • the latter includes deployment at both low frequencies (100s of MHz), similar to long term evolution (LTE) today, and very high frequencies (mm waves in the tens of GHz).
  • NR will use Orthogonal Frequency Division Multiplexing (OFDM) in the downlink (i.e., from a network node such as gNode B (gNB), eNodeB (eNB), or base station, to a wireless device (i.e., user equipment or wireless device).
  • OFDM Orthogonal Frequency Division Multiplexing
  • gNB gNode B
  • eNB eNodeB
  • base station i.e., user equipment or wireless device.
  • DFT discrete Fourier transform
  • the basic NR physical resource can thus be considered as a time-frequency grid similar to the one in LTE as illustrated in FIG. 1 (LTE physical resources), where each resource element corresponds to one OFDM subcarrier during one OFDM symbol interval.
  • LTE physical resources LTE physical resources
  • Af 15 kHz
  • different subcarrier spacing values are supported in NR.
  • resource allocation in LTE is typically described in terms of resource blocks (RBs), where a resource block (RB) corresponds to one slot (0.5 ms) in the time domain and twelve contiguous subcarriers in the frequency domain.
  • Resource blocks are numbered in the frequency domain, starting with zero from one end of the system bandwidth.
  • a resource block is simply twelve subcarriers in frequency.
  • a RB is also referred to as physical RB (PRB).
  • PRB physical RB
  • LTE downlink transmissions are organized into radio frames of 10 ms, each radio frame consisting of ten equally-sized subframes
  • FIG. 2 is a block diagram of an LTE time-domain structure with 15kHz subcarrier spacing.
  • Each subframe is further divided into two slots each with 7 OFDM symbols in a normal cyclic prefix (CP) configuration.
  • CP cyclic prefix
  • a similar frame structure will also be used in NR, in which the subframe length is fixed at 1 ms regardless of the sub-carrier spacing used.
  • the number of slots per subframe depends on the subcarrier spacing that is configured.
  • the slot duration for (15 X 2 a ) kHz subcarrier spacing is given by 2 ⁇ a ms assuming 14 OFDM symbols per slot.
  • Downlink transmissions are dynamically scheduled, i.e., in each subframe or slot the gNB transmits downlink control information (DCI).
  • the DCI indicates to which wireless device, e.g., user equipment (UE), device data is to be transmitted and on which resource blocks in the current downlink subframe the data is transmitted.
  • This control signaling is typically transmitted in the first few OFDM symbols in each subframe in NR.
  • the control information is carried on the Physical Downlink Control Channel (PDCCH) and data is carried on the Physical Downlink Shared Channel (PDSCH).
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • a wireless device first detects and decodes the PDCCH and if the PDCCH is decoded successfully, then the wireless device decodes the corresponding PDSCH based on the decoded control information in the PDCCH.
  • Each wireless device is assigned a unique Cell Radio Network Temporary Identifier (C-RNTI) in the same serving cell.
  • C-RNTI Cell Radio Network Temporary Identifier
  • the cyclic redundancy check (CRC) bits of a PDCCH for a wireless device is scrambled by the wireless device's C-RNTI, so the wireless device recognizes the PDCCH by checking the C-RNTI used to scramble the CRC (cyclic redundancy check) bits of the PDCCH.
  • CRC Cell Radio Network Temporary Identifier
  • Uplink data transmission is also dynamically scheduled using the PDCCH. Similar to the downlink, the wireless device first decodes the uplink grant in PDCCH and then transmits data over the Physical Uplink Shared Channel (PUSCH) based on the decoded control information in the uplink grant such as modulation order, coding rate, uplink resource allocation, etc.
  • PUSCH Physical Uplink Shared Channel
  • a function of an air interface is to carry higher layer data to and from the wireless device.
  • LTE maps logical channels carrying higher layer unicast data to transport channels, including the downlink shared channel (DL-SCH) which is carried on the PDSCH and the uplink shared channel (UL-SCH) which is carried on the PUSCH. Consequently, a primary use for the PDCCH is to allocate resources for the DL-SCH carried on the PDSCH and UL-SCH carried on the PUSCH.
  • LTE uses the PDCCH to initiate other actions in the wireless device other than receiving the DL-SCH on the PDSCH and transmitting the UL-SCH on the PUSCH.
  • Such actions include power control of semi-persistently scheduled UL-SCH, initiation of a random access channel (RACH) procedure using a PDCCH order, reception of the paging channel (PCH) transport channel on the PDSCH, transmission of uplink control information on the PUSCH without the UL-SCH, etc.
  • RACH random access channel
  • PCH paging channel
  • a command in a PDCCH is referred to as an instruction to the wireless device carried in the PDCCH to perform a procedure that is neither receiving DL-SCH on the PDSCH nor transmitting UL-SCH on the Pl. ' SCH.
  • Physical Uplink Control Channel is also supported in NR to carry uplink control information (UCI) such as Hybrid Automatic Repeat Request (HARQ) related Acknowledgement (ACK), Negative
  • UCI uplink control information
  • HARQ Hybrid Automatic Repeat Request
  • ACK Acknowledgement
  • NACK Acknowledgement
  • CSI Channel State Information
  • ACK/NACK is generally used to indicate to the network node whether a PDSCH is received successfully by the wireless device.
  • SPS semi-persistent scheduling
  • PDCCH Physical Downlink Control Channel
  • An SPS PDCCH is used for either SPS activation, in which the PDSCH (for downlink SPS) or PUSCH (for uplink SPS) is also scheduled by the PDCCH, or SPS release, in which the PDSCH or PUSCH is not scheduled.
  • An SPS PDCCH is further validated by looking for configurations in certain DCI fields.
  • the fields and configurations for SPS activation and release validation in LTE are shown in Table 9.2-1 and Table 9.2-1 A of Third Generation Partnership Project (3 GPP) Technical Specification (TS) 36.213 (reproduced below), where DCI formats 0/1 are for uplink data scheduling and DCI formats la/2/2A/2B/2C/2D are for downlink scheduling.
  • Table 9.2-1 A Special fields for Semi-Persistent Scheduling Release PDCCH Validation (3 GPP TS36.213) DCI format 0 DCI format 1A
  • TDD set to '0000'
  • the network node can check whether an activation PDCCH is received by a wireless device by detecting the acknowledgement/non- acknowledgement (ACK/NACK) associated with the SPS PDSCH in the uplink.
  • ACK/NACK acknowledgement/non- acknowledgement
  • the network node can check whether an activation PDCCH is received by a wireless device by detecting the SPS PUSCH in the uplink.
  • a PDCCH with DCI1A is sent to a wireless device to release an on-going downlink SPS while a PDCCH with DCIO is sent to a wireless device to release an on-going uplink SPS.
  • the release or deactivation is indicated implicitly with certain combinations of DCI field values as shown in Table 9.2-1 A.
  • the wireless device When the wireless device detects the SPS PDCCH successfully, the wireless device sends an ACK to the network node to confirm the reception of the release. In this case, the ACK is not associated with any previously received PDSCH.
  • Both DCIO and DCI1A have a command resource block (RB) assignment which is set to all "l"s if it is used as a SPS release.
  • RB command resource block
  • a unique reference signal is transmitted from each antenna port at the gNB for downlink channel estimation at a wireless device.
  • CSI-RS channel state information reference signals
  • a wireless device can estimate the effective channel the CSI-RS is traversing including the radio propagation channel and antenna gains at both the gNB and the wireless device.
  • N tx is the number of transmit antenna ports at the gNB and N rx is the number of receive antenna ports at the wireless device.
  • a wireless device can estimate the N rx X N tx effective channel matrix
  • H ( H(i,j) hi and thus the channel rank, precoding matrix, and channel quality.
  • This is achieved by using a predesigned codebook for each rank, with each codeword in the codebook being a precoding matrix candidate.
  • a wireless device searches through the codebook to find a rank, a codeword associated with the rank, and channel quality associated with the rank and precoding matrix to best match the effective channel.
  • the rank, the precoding matrix and the channel quality are reported in the form of a rank indicator (RI), a precoding matrix indicator (PMI) and a channel quality indicator (CQI) as part of CSI feedback.
  • RI rank indicator
  • PMI precoding matrix indicator
  • CQI channel quality indicator
  • Such precoding essentially strives to focus the transmit energy into a subspace which is strong in the sense of conveying much of the transmitted energy to the wireless device.
  • a CSI-RS signal is transmitted on a set of time-frequency resource elements (REs) associated with an antenna port.
  • the CSI-RS is typically transmitted over the whole system bandwidth.
  • the set of REs used for CSI-RS transmission is referred to as a CSI-RS resource.
  • an antenna port is equivalent to a CSI-RS that the wireless device shall use to measure the channel.
  • Periodic CSI-RS Transmission the CSI-RS is transmitted periodically in certain subframes or slots. This CSI-RS transmission is semi-statically configured using parameters such as CSI-RS resource, periodicity and subframe or slot offset similar to LTE.
  • Aperiodic CSI-RS Transmission This is a one-shot CSI-RS transmission that can happen in any subframe or slot. Here, one-shot means that CSI-RS transmission only happens once per trigger.
  • the CSI-RS resources i.e., the resource element locations which consist of subcarrier locations and OFDM symbol locations
  • the transmission of aperiodic CSI-RS are semi-statically configured. The transmission of aperiodic
  • CSI-RS is triggered by dynamic signaling through PDCCH.
  • the triggering may also include selecting a CSI-RS resource from multiple CSI-RS resources.
  • Semi-Persistent CSI-RS Transmission Similar to periodic CSI-RS, resources for semi-persistent CSI-RS transmissions are semi-statically configured with parameters such as periodicity and subframe or slot offset. However, unlike periodic CSI-RS, dynamic signaling is needed to activate and possibly deactivate the CSI-RS transmission. An example is shown in FIG. 3 that is a block diagram of a semi-persistent CSI-RS transmission.
  • wireless devices can be configured to report CSI in periodic or aperiodic reporting modes.
  • Periodic CSI reporting is carried on PUCCH while aperiodic CSI is carried on PUSCH.
  • PUCCH is transmitted in a fixed or configured number of PRBs and using a single spatial layer (or rank 1) with quadrature phase shift keying (QPSK) modulation.
  • QPSK quadrature phase shift keying
  • PUSCH resources carrying aperiodic CSI reporting are dynamically allocated through uplink grants carried over the PDCCH or enhanced PDCCH (EPDCCH), and can occupy a variable number of PRBs, use modulation states such as QPSK, 16 quadrature amplitude modulation (QAM), and 64 QAM, as well as multiple spatial layers.
  • NR in addition to periodic and aperiodic CSI reporting as in LTE, semi- persistent CSI reporting will also be supported.
  • three types of CSI reporting will be supported in NR as follows:
  • Parameters such as periodicity and sub frame or slot offset are configured semi- statically, by higher layer signaling from the network node to the wireless device.
  • Aperiodic CSI Reporting This type of CSI reporting involves a single-shot (i.e., one time) CSI report by the wireless device which is dynamically triggered by the network node, e.g. by the DCI in PDCCH. Some of the parameters related to the configuration of the aperiodic CSI report are semi-statically configured from the network node to the wireless device but the triggering is dynamic.
  • Semi-Persistent CSI Reporting similar to periodic CSI reporting, semi-persistent CSI reporting has a periodicity and subframe or slot offset which may be semi- statically configured by the network node to the wireless device. However, a dynamic trigger from network node to wireless device may be needed to allow the wireless device to begin semi-persistent CSI reporting.
  • o Semi-persistent CSI reporting is dynamically activated/deactivated o Aperiodic CSI reporting is triggered by DCI For semi-persistent transmission of CSI-RS, o Semi-persistent CSI reporting is activated/deactivated dynamically o Aperiodic CSI reporting is triggered by DCI For aperiodic transmission of CSI-RS, o Aperiodic CSI reporting is triggered by DCI o Aperiodic CSI-RS is triggered dynamically
  • a wireless device can be configured with N > 1 CSI reporting settings, M > 1 Resource settings, and 1 CSI measurement setting, where the CSI measurement setting includes L >1 links and a value of L may depend on the wireless device capability.
  • At least the following configuration parameters are signaled via RRC at least for CSI acquisition.
  • N, M, and L are indicated either implicitly or explicitly;
  • each CSI reporting setting at least: reported CSI parameter(s), CSI Type (I or II) if reported, codebook configuration including codebook subset restriction, time-domain behavior, frequency granularity for CQI and PMI, measurement restriction configurations;
  • CSI reporting setting indication In each of the L links in CSI measurement setting: CSI reporting setting indication, resource setting indication, quantity to be measured (either channel or interference) o
  • One CSI reporting setting can be linked with one or multiple
  • the following are dynamically selected by LI or L2 signaling, if applicable. o One or multiple CSI reporting settings within the CSI measurement setting; o One or multiple CSI-RS resource sets selected from at least one Resource setting; o One or multiple CSI-RS resources selected from at least one CSI- RS resource set; SRS
  • the sounding reference signal is used for uplink channel quality measurements for frequency-selective scheduling and link adaption.
  • the SRS is also used for uplink timing estimation.
  • TDD time division duplex
  • SRS can also be used to estimate downlink channel since the same carrier frequency is used in both downlink and uplink.
  • SRS is only transmitted by a wireless device in the last OFDM symbol of a subframe configured for SRS transmission for the wireless device.
  • the location of SRS in a PRB in a SRS subframe is shown a diagram in FIG. 4, where DMRSs (DeModulation Reference Signals) are used for channel estimation in PUSCH demodulation.
  • DMRSs DeModulation Reference Signals
  • a wireless device can be configured with different SRS bandwidths.
  • two kinds of sounding bandwidth are supported, one is wideband and the other is narrow band.
  • channel measurement over the full system bandwidth can be performed in a single subframe.
  • narrow band sounding only part of the full system bandwidth is measured in a subframe.
  • Frequency hopping is supported for narrowband SRS so that different parts of the frequency band can be measured in different subframes.
  • two types of sounding are supported, i.e., periodic (also referred to as type 0) and aperiodic (also referred to as type 1).
  • a wireless device transmits the SRS periodically at certain configured SRS subframes.
  • a wireless device transmits the SRS only when it is requested by network node.
  • the SRS subframes for periodic and aperiodic SRS are separately configured for a wireless device, both are within the cell specific SRS subframes.
  • the SRS bandwidth for a wireless device is configurable and is in the multiple of 4 PRBs.
  • the minimum SRS bandwidth is 4 PRBs, which is also referred to as an SRS subband.
  • An example is shown in FIG. 5 that is a block diagram of an example of wideband and narrowband SRS with 10 MHz system bandwidth.
  • a SRS is transmitted on a different part of the system bandwidth at different SRS subframes.
  • a SRS may be a phase-shifted Zadoff-Chu sequence.
  • Different wireless devices can be multiplexed on the same time-frequency resources by assigning different phase shifts, known as cyclic shifts (CS).
  • CS cyclic shifts
  • a SRS signal is only transmitted on half of the subcarriers in the configured SRS bandwidth, either even-numbered or odd-numbered subcarriers, configurable through a parameter called comb. This is also referred to as Interleaved Frequency Division Multiple Access (IFDMA) with a repetition factor of 2.
  • IFDMA Interleaved Frequency Division Multiple Access
  • SRS will also be supported in NR for uplink channel sounding. Similar to LTE, configurable SRS bandwidth is supported. SRS can be configurable with regard to density in the frequency domain (e.g., comb levels) and/or in the time domain (including multi-symbol SRS transmissions).
  • partial band size is also supported in NR, which is smaller than the largest transmission bandwidth supported by the wireless device.
  • the size is equal to the largest transmission bandwidth supported by the wireless device.
  • both aperiodic and periodic SRS transmissions are supported in NR.
  • semi-persistent SRS transmission is also supported in NR, in which SRS transmission can be activated or deactivated.
  • a SRS resource is composed of a set of resource elements (REs) within a time duration and frequency span and N antenna ports (N > 1).
  • a wireless device can be configured with K > 1 NR-SRS resources. The maximum value of K is considered to be a wireless device capability.
  • the wireless device can be configured to transmit a subset of or all K NR-SRS resources.
  • the wireless device can be configured to transmit K SRS resources with no precoding, the same or different precoding
  • the downlink and uplink operate on the same carrier frequency and thus, the uplink channel is the same as the downlink channel if the same number of receive (Rx) and transmit (Tx) antennas are used in the wireless device and if the system is calibrated.
  • the downlink channel can be obtained from an uplink channel measurement over SRS at a network node.
  • a wireless device when a wireless device has more Rx antennas than Tx antennas, only a partial downlink channel can be obtained from the uplink channel.
  • One way to solve the problem is to allow the wireless device to switch its Tx antennas for SRS transmission so that the network node can obtain an uplink channel for all the wireless device antennas so that the downlink channel can be derived from the uplink.
  • NR should support a wide range of frequencies and deployments (in terms of inter-site distance, number of antennas, beamforming architectures, etc.).
  • beamforming is likely needed for all signals (i.e. reference signals, data and control) to achieve proper coverage.
  • aligning the Tx and Rx beams between network node and a wireless device is important.
  • the network node may need to sweep its Tx beams in order to cover or identify wireless devices in different areas.
  • a wireless device may report the best network node Tx beam(s) to the network node so that the network node knows which beam(s) should be used to communicate to the wireless device.
  • the wireless device may also sweep its Rx beams for each network node Tx beam to identify the best Rx beam for the Tx beam. During this process, a wireless device may need assistance from the network node to find suitable RX and TX beam pair(s). In some case, a wireless device may have multiple antenna panels each with a set of associated beams. In this case, a wireless device may need to first identify the proper antenna panel and then the beam(s) associated with the antenna panel for a particular Tx beam. The process of identifying the proper Tx and Rx beam pairs or beam pair links (BPLs) is generally referred to as beam management.
  • beam management The process of identifying the proper Tx and Rx beam pairs or beam pair links
  • multiple BPLs can be used between a network node (or multiple network nodes) and a wireless device.
  • the network node can switch active BPL to a monitored BPL by signaling a BPL switch command to the wireless device.
  • the network node can signal a BPL switch command, through the active BPL, to the wireless device such that the monitored BPL becomes the new active BPL.
  • RSRP reference signal received power
  • set indicator(s) are included in the measurement report(s) from wireless device to the network node.
  • the definition of a set is that reported Tx beams contained in the same set can be received simultaneously at the wireless device, e.g., the corresponding Rx beams are from different panels.
  • an antenna panel refers to a directional antenna which contains multiple antenna elements.
  • FIG. 6 is a diagram of an example beam set based reporting that indicates an example of how the wireless device could choose to form two different sets.
  • the wireless device is equipped with two antenna panels.
  • the solid lines indicate the first set containing transmit beams four and ten which can be received
  • FIG. 7 is a diagram of an example of beam group based reporting.
  • the wireless device is equipped with two antenna panels.
  • group-based reporting the wireless device forms a group of transmit beams contained that may not be possible to be received simultaneously at the wireless device, e.g., the corresponding receive beams are from the same panel at the wireless device.
  • the dashed lines indicate the first group containing transmit beams 4 and 5 corresponding to the first wireless device antenna panel, and thus cannot be received simultaneously.
  • the solid lines indicate a second group containing transmit beams 3 and 10 corresponding to the second wireless device antenna panel and thus cannot be received simultaneously.
  • system performance can be enhanced with multiple beam sets or beam groups (that is, when L' >1) in scenarios with high signal to noise ratios (SNRs).
  • SNRs signal to noise ratios
  • Embodiment 1 Some embodiments advantageously provide a wireless communication method, wireless device and network node for a downlink control channel with fast confirmation.
  • downlink or uplink data scheduling DCIs are also used for sending commands to a wireless device.
  • commands may include activation/deactivation of a downlink semi-persistent CSI- RS, or switching a beam pair link or links, by setting downlink data scheduling related DCI fields to certain preconfigured values, each corresponding to a different command.
  • the preconfigured values will not occur for normal data scheduling.
  • the DCIs will also contain fields associated with the commands such as:
  • a wireless device sends an ACK in the indicated uplink resource after receiving the command.
  • the network node detects the ACK to determine if the DCI containing the command is received by the wireless device.
  • the ACK resource can be in the same subframe in which the PDCCH is received for fast confirmation.
  • Embodiment 2 To help distinguish a normal data scheduling DCI from the DCI used for sending a command, a different RNTI may be used for CRC scrambling.
  • Embodiment 2 To help distinguish a normal data scheduling DCI from the DCI used for sending a command, a different RNTI may be used for CRC scrambling.
  • Embodiment 1 may not be as efficient as desired since the fields related to PDSCH or PUSCH scheduling, such as resource block assignment, are redundant for sending a command.
  • extra fields may be added for sending a command such as for CSI-RS resource and/or ACK resource indication, which may not be needed for normal data scheduling. Both of which would cause signaling overhead.
  • a benefit of using the same DCIs for both data scheduling and sending commands is that a same number of blind decoding attempts by a wireless device can be maintained, since the same DCI size would be used. In this
  • a shortened DCI (with smaller number of bits) without the data scheduling fields is introduced. It is used for signaling commands such as activation/deactivation of semi-persistent CSI-RS, beam switching, SRS antenna switching, etc., without any data scheduling.
  • the shortened DCI includes at least one of a field to indicate the command type such as CSI-RS
  • a wireless device sends an ACK in the indicated uplink resource after receiving the command.
  • the network node detects the ACK to determine if the DCI containing the command is received by the wireless device.
  • the ACK resource can be in the same subframe in which the PDCCH is received for fast confirmation.
  • a method in a user equipment includes receiving a command in a downlink control channel.
  • the method also includes determining uplink resources to use to transmit an acknowledgement confirming receipt of the command, the uplink resources being identified by a content of the downlink channel.
  • the method also includes transmitting the
  • the acknowledgment confirming receipt of the command is transmitted in a same subframe where the command was received.
  • the command includes at least one downlink control information, DCI, field set to at least one predefined value, the at least one predefined value indicating the command type of the command.
  • the command type includes at least one taken from the group consisting of: CSI-RS activation type, CSI-RS deactivation type, beam switching and SRS transmitting antenna switching type.
  • the at least one DCI field indicates one taken from the group consisting of: at least one parameter for the command, at least one beam pair link and at least one transmission antenna; and the at least one parameter indicates a semi-persistent CSI-RS resource.
  • the identified uplink resources are Physical Uplink Control Channel (PUCCH) resources.
  • the acknowledgment confirming receipt of the command is transmitted as a Hybrid Automatic Repeat Request (HARQ) acknowledgement in the identified uplink resources.
  • the acknowledgment is transmitted as one taken from the group consisting of: a bit field in Uplink Control Information (UCI) and a Physical Random Access Channel (PRACH) preamble.
  • an uplink resource is one taken from the group consisting of: identified in the downlink control channel and derived based on a resource of the downlink control channel.
  • the command is one taken from the group consisting of: activation of semi-persistent CSI-RS transmission; de-activation of semi-persistent CSI-RS transmission; reconfiguration of one of a periodic and semi-persistent CSI reporting content; dynamic selection of reporting settings; switching of beam pair link; switching a transmit antenna for SRS; and changing a number of beams sets for beam reporting.
  • a user equipment includes processing circuitry including a processor and a memory.
  • the processing circuitry is configured to: receive a command in a downlink control channel;
  • uplink resources to use to transmit an acknowledgement confirming receipt of the command, the uplink resources being identified by a content of the downlink channel; and transmit the acknowledgement confirming receipt of the command on the identified uplink resources.
  • the acknowledgment confirming receipt of the command is transmitted in a same subframe where the command was received.
  • the command includes at least one downlink control information, DCI, field set to at least one predefined value, the at least one predefined value indicating the command type of the command.
  • the command type includes at least one taken from the group consisting of: CSI-RS activation type, CSI-RS deactivation type, beam switching and SRS transmitting antenna switching type.
  • the at least one DCI field indicates one taken from the group consisting of: at least one parameter for the command, at least one beam pair link and at least one transmission antenna; and the at least one parameter indicates a semi-persistent CSI-RS resource.
  • the identified uplink resources are Physical Uplink Control Channel (PUCCH) resources.
  • the acknowledgment confirming receipt of the command is transmitted as a Hybrid Automatic Repeat Request (HARQ) acknowledgement in the identified uplink resources.
  • the acknowledgment is transmitted as one taken from the group consisting of: a bit field in Uplink Control Information (UCI) and a Physical Random Access Channel (PRACH) preamble.
  • the identified uplink resource is one taken from the group consisting of: identified in the downlink control channel and derived based on a resource of the downlink control channel.
  • the command is one taken from the group consisting of: activation of semi-persistent CSI-RS transmission; de-activation of semi-persistent CSI-RS transmission; reconfiguration of one of a periodic and semi-persistent CSI reporting content; dynamic selection of reporting settings; switching of beam pair link; switching a transmit antenna for SRS; and changing a number of beams sets for beam reporting.
  • a base station includes processing circuitry including a processor and a memory.
  • the processing circuitry is configured to: determine a command to communicate to a user equipment;
  • the command to the user equipment in a downlink control channel, the command identifying uplink resources to use to transmit an acknowledgement; and receive an acknowledgement confirming receipt of the command on the identified uplink resources.
  • the command includes at least one downlink control information, DCI, field set to at least one predefined value, the at least one predefined value indicating the command type of the command.
  • the command type includes at least one taken from the group consisting of: CSI-RS activation type, CSI-RS deactivation type, beam switching and SRS transmitting antenna switching type.
  • the at least one DCI field indicates one taken from the group consisting of: at least one parameter for the command, at least one beam pair link and at least one transmission antenna; and the at least one parameter indicates a semi-persistent CSI-RS resource.
  • the command is one taken from the group consisting of: activation of semi-persistent CSI- RS transmission;
  • de-activation of semi-persistent CSI-RS transmission de-activation of semi-persistent CSI-RS transmission; reconfiguration of one of a periodic and semi-persistent CSI reporting content; dynamic selection of reporting settings; switching of beam pair link; switching a transmit antenna for SRS; and changing a number of beams sets for beam reporting.
  • a method for a base station includes determining a command to communicate to user equipment; communicating the command to user equipment in a downlink control channel, the command identifying uplink resources to use to transmit an acknowledgement; and receiving an acknowledgement confirming receipt of the command on the identified uplink resources.
  • the command includes at least one downlink control information, DCI, field set to at least one predefined value, the at least one predefined value indicating the command type of the command.
  • the command type includes at least one taken from the group of: CSI-RS activation type, CSI-RS deactivation type, beam switching and SRS transmitting antenna switching type.
  • the at least one DCI field indicates one taken from the group consisting of: at least one parameter for the command, at least one beam pair link and at least one transmission antenna; and the at least one parameter indicating a semi-persistent CSI-RS resource.
  • the command is one taken from the group consisting of: activation of semi-persistent CSI-RS transmission; deactivation of semi-persistent CSI-RS transmission; reconfiguration of one of a periodic and semi-persistent CSI reporting content; dynamic selection of reporting settings; switching of beam pair link; switching a transmit antenna for SRS; and changing a number of beams sets for beam reporting.
  • FIG. 1 is a diagram of LTE physical resources
  • FIG. 2 is a diagram of an LTE time-domain structure with 15kHz subcarrier spacing
  • FIG. 3 is a diagram of a semi-persistent CSI-RS transmission
  • FIG. 4 is a diagram of a location of SRS in a PRB in a SRS subframe
  • FIG. 5 is a diagram of an example of wideband and narrowband SRS with 10 MHz system bandwidth
  • FIG. 6 is a diagram of an example beam set based reporting that indicates an example of how the wireless device could choose to form two different sets
  • FIG. 7 is a diagram of an example of beam group based reporting
  • FIG. 8 is a block diagram of an example system for a downlink control channel command with confirmation in accordance with the principles of the disclosure
  • FIG. 9 is a block diagram of an alternative embodiment of a wireless device in accordance with the principles of the disclosure.
  • FIG. 10 is a block diagram of an alternative embodiment of a network node in accordance with the principles of the disclosure.
  • FIG. 11 is a flow diagram of an example detection processing of detection code in accordance with the principles of the disclosure
  • FIG. 12 is a flow diagram of an example command process of command code
  • FIG. 13 is diagram of an example of using DCI to send
  • FIG. 14 is a diagram of an example sending of a command in DCI to wireless device to switch CSI reporting for a different cell in periodic CSI reporting;
  • FIG. 15 is a diagram of an example of sending of a command in DCI to wireless device to switch beam pair link
  • FIG. 16 is a diagram of an example of sending of a command in DCI to wireless device to switch antenna for SRS transmission
  • FIG. 17 is a diagram of an example of a command in DCI to wireless device to change the number of beam groups/sets for beam reporting in beam management
  • FIG. 18 is a diagram of an example of activating/deactivating semi-persistent CSI-RS transmission in multiple cells by sending DCI command on one cell.
  • a network node For semi-persistent CSI-RS activation or deactivation, beam pair link (BPL) switching, semi-persistent SRS activation or deactivation, SRS transmit antenna switching, or other dynamic configuration changes, a network node should know whether the PDCCH carrying the command for activation/deactivation/switching has been received successfully. Otherwise, the network and wireless device can be out of sync in each of the scenarios and the performance of the system can be degraded or even link failure can occur.
  • BPL beam pair link
  • the gNB may not be able to detect that the reporting has been changed.
  • Some embodiments of the present disclosure aim to alleviate at least some of the problems with existing systems as described above. Some of the embodiments disclosed herein may help to avoid error propagations in the system. Some of the embodiments disclosed herein may allow the network node to know quickly (from a point of view of preventing undesirable system performance as noted above) whether a PDCCH is successfully received by a wireless device. If the PDCCH is successfully received by the wireless device, the network node can proceed with subsequent actions. If the PDCCH is not received successfully, the network node may send the PDCCH again or suspend the subsequent actions.
  • the joining term, "in communication with” and the like may be used to indicate electrical or data communication, which may be accomplished by physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling or optical signaling, for example.
  • electrical or data communication may be accomplished by physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling or optical signaling, for example.
  • FIG. 8 a block diagram of an example system for downlink control channel command with confirmation in accordance with the principles of the disclosure, where the system is generally referred to as system "10."
  • System 10 includes one or more network nodes 12 and one or more wireless devices 14, in communication with each other via one or more communication networks, paths and/or links using one or more communication protocols, as described herein.
  • Network node 12 includes transmitter circuitry 16 and receiver circuitry 18 for communicating with wireless device 14, other nodes 12 and/or other entities in system 10.
  • transceiver circuitry 16 and/or receiver circuitry 18 include and/or is/are replaced by one or more communication interfaces.
  • Network node 12 includes processing circuitry 20.
  • network node such as “network node 12" used herein can be any kind of network node comprised in a radio network which may further comprise any of base station (BS), radio base station, base transceiver station (BTS), base station controller (BSC), radio network controller (RNC), evolved Node B (eNB or eNodeB), Node B, gNodeB (gNB), multi-standard radio (MSR) radio node such as MSR BS, relay node, donor node controlling relay, radio access point (AP), transmission points, transmission nodes, Remote Radio Unit (RRU) Remote Radio Head (RRH), nodes in distributed antenna system (DAS), etc.
  • BS base station
  • BTS base transceiver station
  • BSC base station controller
  • RNC radio network controller
  • eNB or eNodeB Node B
  • gNodeB gNodeB
  • MSR multi-standard radio
  • Processing circuitry 20 includes processor 22 and memory 24.
  • processing circuitry 20 may comprise integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry).
  • Processor 22 may be configured to access (e.g., write to and/or reading from) memory 24, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • memory 24 may be configured to store code executable by processor 22 and/or other data, e.g., data pertaining to communication, e.g., configuration and/or address data of nodes, etc.
  • Processing circuitry 20 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, signaling and/or processes to be performed, e.g., by network node 12.
  • Processor 22 corresponds to one or more processors 22 for performing network node 12 functions described herein.
  • Network node 12 includes memory 24 that is configured to store data, programmatic software code and/or other information described herein.
  • memory 24 is configured to store command code 26.
  • command code 26 includes instructions that, when executed by processor 22, causes processor 22 to perform the functions described herein such as the functions described with respect to FIG. 10.
  • Wireless device 14 includes transmitter circuitry 28 and receiver circuitry 30 for communicating with network node 12, other wireless devices 14 and/or other entities in system 10.
  • transmitter circuitry 28 and/or receiver circuitry 30 include and/or is/are replaced by one or more communication interfaces.
  • Wireless device 14 includes processing circuitry 32.
  • Processing circuitry 32 includes processor 34 and memory 36.
  • processing circuitry 32 may include integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry).
  • Processor 34 may be configured to access (e.g., write to and/or reading from) memory 36, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • memory 36 may be configured to store code executable by processor 34 and/or other data, e.g., data pertaining to communication, e.g., configuration and/or address data of nodes, etc.
  • Processing circuitry 32 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, signaling and/or processes to be performed, e.g., by wireless device 14.
  • Processor 34 corresponds to one or more processors 34 for performing wireless device 14 functions described herein.
  • Wireless device 14 includes memory 36 that is configured to store data, programmatic software code and/or other information described herein.
  • memory 36 is configured to store detection code 38.
  • detection code 38 includes instructions that, when executed by processor 34, causes processor 34 to perform the functions described herein such as the functions described with respect to FIG. 9.
  • wireless device 14 may be a radio communication device, wireless device endpoint, mobile endpoint, device endpoint, sensor device, target device, device-to-device wireless device, user equipment (UE), machine type wireless device or wireless device capable of machine to machine communication, a sensor equipped with wireless device, tablet, mobile terminal, mobile telephone, laptop, computer, appliance, automobile, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongle and customer premises equipment (CPE), among other devices that can communicate radio or wireless signals as are known in the art.
  • UE user equipment
  • machine type wireless device or wireless device capable of machine to machine communication a sensor equipped with wireless device, tablet, mobile terminal, mobile telephone, laptop, computer, appliance, automobile, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongle and customer premises equipment (CPE), among other devices that can communicate radio or wireless signals as are known in the art.
  • LOE laptop embedded equipped
  • LME laptop mounted equipment
  • CPE customer premises equipment
  • FIG. 9 is a block diagram of an alternative embodiment of wireless device 14 in accordance with the principles of the disclosure.
  • Wireless device 14 includes reception module 40 that is configured to receive a command in a downlink control channel as described with respect to Block S 100 of FIG. 11.
  • Wireless device 14 includes determination module 42 that is configured to determine uplink resources to transmit an acknowledgment confirming receipt of the command as described with respect to Block S 102 of FIG. 11.
  • Wireless device 14 includes transmission module 44 that is configured to transmit an acknowledgment confirming receipt of the command on the identified uplink resources as described with respect to Block S 104 of FIG. 11.
  • FIG. 10 is a block diagram of an alternative embodiment of network node 12 in accordance with the principles of the disclosure.
  • Network node 12 includes command determination module 46 that is configured to determine a command to communicate to wireless device 14 as described with respect to Block S 106 of FIG. 12.
  • Network node 12 includes communication module 48 that is configured to communicate the command to wireless device 14 in a downlink control channel as described with respect to Block S 108 of FIG. 12.
  • Network node 12 includes acknowledgment reception module 50 that is configured to receive an
  • FIG. 11 is a flow diagram of an example detection processing of detection code 38 in accordance with the principles of the disclosure.
  • Processing circuitry 32 is configured to receive a command in a downlink control channel, as described herein (Block S 100).
  • Processing circuitry 32 determines uplink resources to use to transmit an acknowledgement confirming receipt of the command, as described herein (Block S 102).
  • the uplink resources are identified by a content of the downlink channel.
  • Processing circuitry 32 transmits the acknowledgement confirming receipt of the command on the identified uplink resources, as described herein (Block S 104).
  • FIG. 12 is a flow diagram of an example command process of command code 26 in accordance with the principles of the disclosure.
  • Processing circuitry 20 determines a command to communicate to wireless device 14, as described herein
  • Processing circuitry 20 communicates the command to wireless device 14 in a downlink control channel, as described herein (Block S 108). Processing circuitry 20 receives an acknowledgement confirming receipt of the command on the identified uplink resources, as described herein (Block S 110).
  • the network node always performs the detection, even if wireless device 14 did not send a confirmation, such as when wireless device 14 did not receive the command successfully. As such, in these embodiments, the outcome of the detection is either that a confirmation is detected or not detected.
  • Embodiment 1 Sharing data scheduling DCIs for sending dynamic commands to wireless device 14
  • Downlink or uplink data scheduling DCIs are shared (i.e., have the same size or length and with the same bit fields) for sending to wireless device 14 commands such as activation/deactivation of a downlink semi-persistent CSI-RS, or switching a beam pair link by setting downlink data scheduling related DCI fields to a set of preconfigured or predefined values, each set corresponding to a different command.
  • the preconfigured values should not occur for normal data scheduling.
  • the DCIs may further contain additional fields associated with the command:
  • a field to indicate an ACK resource in the uplink and/or
  • a field to indicate the parameters of the command such as the semi- persistent CSI-RS resource to be activated/deactivated, the beam pair link(s) to be switched to, the antenna to be switched to, etc.
  • Wireless device 14 detects the DCI by comparing the data scheduling related fields with the predefined sets of values. If the fields match a set of
  • the DCI is determined to be a DCI carrying a command.
  • Wireless device 14 then sends an acknowledgment (ACK) in either the indicated uplink resource, or a preconfigured ACK resource after receiving the DCI.
  • ACK may be sent in the same subframe over which the DCI is received, or in a later subframe.
  • Network node 12 detects the ACK in the same uplink resource to determine if the DCI containing the command is received by wireless device 14.
  • a different RNTI from C-RNTI and SPS-RNTI may be used to scramble the CRC of the DCIs for sending a command.
  • the new RNTI is referred to as "COMMAND-RNTI”.
  • the sets of predefined values can be more flexible and more commands can be defined.
  • Embodiment 2 Using a compact DCI for sending a dynamic command to wireless device 14
  • a benefit of Embodiment 1 may be that the same number of blind decoding attempts by wireless device 14 are required since the same DCI size is used for data scheduling and for sending a command. This may not be efficient in terms of PDCCH resource utilization because the fields related to data scheduling such as resource block assignment are redundant for sending a configuration command. In addition, extra fields may need to be added for sending a command such as for CSI-RS resource and/or ACK resource indication, which are not needed for normal data scheduling. Both of these implementations would cause signaling overhead. In another embodiment, a shortened or more compact DCI without the data scheduling fields is proposed.
  • the shortened DCI includes at least one of the following fields: a field to indicate the command type such as CSI-RS
  • a field to indicate an ACK resource in the uplink and/or - a field to indicate the parameters for the command such as the semi- persistent CSI-RS resource, beam pair links, or Tx antennas.
  • wireless device 14 After a shortened DCI is detected, wireless device 14 sends an ACK in either the indicated uplink resource, an ACK resource derived based on the PDCCH resource carrying the DCI, or a preconfigured ACK resource after receiving the command.
  • Network node 12 detects the ACK in the same uplink resource to determine if the shortened DCI containing the command is received by wireless device 14. In this case, the wireless device 14 needs to monitor both the data scheduling DCI and the shortened DCI and the number of blind decoding attempts may be increased.
  • the PDCCH can be used for activation/deactivation of a semi- persistent CSI-RS transmission, in which a CSI-RS resource with predefined periodicity and transmission slot offset is activated for CSI-RS transmission over a certain time interval and deactivated thereafter.
  • the network node can send CSI report requests to wireless device 14 for measuring the downlink channel based on the semi-persistent CSI-RS and feeding back CSI reports.
  • the network node may know that the activation and/or deactivation PDCCH is successfully received by wireless device 14. Otherwise, wireless device 14 may not interpret the CSI report request correctly and may calculate CSI based on erroneous assumptions.
  • the network node 12 sends an activation command to the wireless device 14 to activate a semi-persistent CSI-RS transmission.
  • the network node 12 After receiving the acknowledgement, the network node 12 then starts transmitting CSI-RS in the preconfigured subframes/slots.
  • a deactivation command may be sent to deactivate the CSI-RS
  • the network node 12 may send the deactivation command again and discard any CSI reports received after the first deactivation command.
  • the PDCCH may also be used to update the content of ongoing semi- persistent or periodic reporting.
  • a few bits in DCI may indicate different combinations of cells (i.e., component carriers) and/or measurement settings.
  • wireless device 14 When wireless device 14 is signaled a new combination, it will update the content of the report accordingly. Since the report is ongoing, its presence may not be used to verify that the DCI was received. Consequently, especially if the size of the report does not change, network node 12 may not know if the report is generated with new or old combination. Hence, to ensure that network node 12 knows which combination is used to generate an ongoing semi-persistent or periodic report, the wireless device 14 sends an ACK signal to the network node 12, when the DCI is received
  • FIG. 14 An example of sending a command in DCI to the wireless device 14 to switch CSI reporting for a different cell in periodic CSI reporting is shown in FIG. 14.
  • the PDCCH indicates which one among the multiple reports settings the wireless device 14 should use for reporting. If the PDCCH indicating which preconfigured combination of cells and/or measurement setting is received successfully, the wireless device 14 sends an ACK to network node 12.
  • the wireless device 14 when the wireless device 14 receives the PDCCH indicating which combination of cells and/or measurement setting the wireless device 14 should use for CSI reports, the wireless device 14 updates the associated parameters such as cells (i.e., component carriers) and/or measurement settings within the reporting setting with the new combination indicated.
  • the wireless device 14 may send an ACK to the network node 12 if the PDCCH indicating the new combination of cells and/or measurement setting is received successfully. Once the wireless device 14 sends the ACK confirmation, the network node 12 will also update the corresponding report setting parameters with the new combination of cells and/or measurement setting indicated in the PDCCH message.
  • a reporting setting may contain a parameter containing multiple options for the combination of cells (i.e., component carriers) and/or measurement settings, and these multiple options may be semi-statically configured to the wireless device 14 via RRC signaling.
  • the PDCCH indicates a new combination, then indicates which of the multiple options should be assumed by the wireless device 14 for CSI reporting.
  • the PDCCH can also contain an instruction for the wireless device 14 to switch its receive and/or transmit beam(s) in NR, i.e., to switch to another beam pair link (a pair of transmit and receive beams).
  • a purpose for such a switch may be that the performance of a current beam pair link is degrading and switching to a new beam pair link is desired.
  • the network node 12 should know that the PDCCH is successfully received by the wireless device 14.
  • the change of a beam pair link may include the network node 12 changing its transmit beam and the wireless device 14 changing its receive beam in order to receive a signal transmitted in the new beam direction.
  • the wireless device 14 may maintain its previous receive beam for subsequent receptions, which may not reflect the updated transmit beam.
  • An example of sending a command in DCI to the wireless device 14 to switch beam pair link is shown in FIG. 15.
  • the PDCCH can also contain an instruction for the wireless device 14 to switch its Tx antenna for SRS transmission. This can happen when the network node 12 wants to measure the uplink channel associated with different transmit antennas at the wireless device 14. In this case, it is also important for the network node 12 to know that the switching instruction has been received successfully by the wireless device 14 and the correct uplink channel is measured.
  • An example of sending a command in the DCI to the wireless device 14 to switch antenna for SRS transmission is shown in FIG. 16.
  • the uplink resource for the ACK signal can be indicated dynamically in the PDCCH, semi- statically configured through RRC, derived implicitly by the wireless device 14 based on the resource over which the PDCCH is received, or a combination of the above.
  • the ACK signal is a hybrid automatic repeat request (HARQ)-ACK signal carried on a PUCCH resource, and the PUCCH resources are indicated in DCI.
  • HARQ hybrid automatic repeat request
  • a special uplink control information (UCI) format for the PDCCH- ACK is used for the PUCCH transmission.
  • the PDCCH- ACK may indicate the specific PDCCH that was correctly received by including a checksum of the DCI content of the specific PDCCH, for instance conveyed using a two bit indicator that sums up to bits in the DCI modulo 4.
  • the ACK signal and resources are the same as that used for scheduling requests, and the resources used are configured through higher layer signaling.
  • RACH resources are used to carry the ACK signal, and the resources used are again configured through higher layer signaling.
  • a specific physical random access channel (PRACH) preamble may be used to differentiate the ACK signals from regular RACH transmissions, and in an embodiment, the RACH preamble is indicated in the DCI carried on the PDCCH.
  • PRACH physical random access channel
  • a "value tag" field comprising at least one bit is appended to the CSI.
  • the value tag is changed each time the PDCCH is successfully decoded. If one bit is used, the value tag is toggled for each PDCCH received, while if more than one bit is used, the value tag is incremented for each successful PDCCH reception, wrapping to zero when the value would exceed that which can be represented in the number of bits used for the value tag.
  • the ACK signals are not transmitted directly but are instead piggybacked on the next PUSCH transmission. If several PDCCHs that do not comprise an UL or DL resource allocation have been received prior to reception of a PDCCH comprising an UL grant for PUSCH transmission, several PDCCH-ACK may be piggybacked on PUSCH where the PDCCH-ACK comprises a PDCCH- indicator field. In this case, although the PDCCH- ACKs may be delivered to network node 12 after some delay compared to if they were transmitted directly, a separate ACK signal is not required which may conserve uplink resources.
  • the wireless device 14 is configured with at least two report settings for the purpose of beam management.
  • the wireless device 14 is configured with multiple V> ⁇ beam sets or groups.
  • the PDCCH indicates via DCI which number of beam sets or groups should be used for beam reporting (that is, the PDCCH indicates to the wireless device 14 which report setting is to be used for beam reporting).
  • the PDCCH when the beam reporting is periodic or semi-persistent, can dynamically indicate to the wireless device 14 to change the number of beam sets or groups that the wireless device 14 should use for beam reporting in the middle of an ongoing periodic or semi-persistent beam reporting.
  • the wireless device 14 may send an ACK to network node 12 when the PDCCH is received successfully.
  • An example of sending a command in DCI to the wireless device 14 to change the number of beam groups or sets for beam reporting in beam management is shown in FIG. 17.
  • Embodiment 3 Triggering Semi-persistent CSI-RS transmission or beam switching on multiple component carriers or cells
  • a DCI command is sent to the wireless device 14 in a primary carrier to activate/deactivate semi-persistent CSI-RS transmissions, or beam pair link switching in one or more component carriers simultaneously.
  • the wireless device 14 sends an acknowledgement over the primary carrier or cell after having received the command.
  • An example of activating/deactivating semi-persistent CSI- RS transmission in multiple cells by sending a DCI command on one cell is shown in FIG. 18.
  • the detection by the network node 12 includes detecting whether a signal is present in the uplink resource and if a signal is present, then decoding the signal for a proper ACK signal from the wireless device 14.
  • some embodiments include a method in a user equipment 14.
  • the method includes receiving a command in a downlink control channel (S 100).
  • the method also includes determining uplink resources to use to transmit an acknowledgement confirming receipt of the command, the uplink resources being identified by a content of the downlink channel (S 102).
  • the method also includes transmitting the acknowledgement confirming receipt of the command on the identified uplink resources (S 104).
  • the acknowledgment confirming receipt of the command is transmitted in a same subframe where the command was received.
  • the command includes at least one downlink control information, DCI, field set to at least one predefined value, the at least one predefined value indicating the command type of the command.
  • the command type includes at least one taken from the group consisting of: CSI-RS activation type, CSI-RS deactivation type, beam switching and SRS transmitting antenna switching type.
  • the at least one DCI field indicates one taken from the group consisting of: at least one parameter for the command, at least one beam pair link and at least one transmission antenna; and the at least one parameter indicates a semi-persistent CSI-RS resource.
  • the identified uplink resources are Physical Uplink Control Channel (PUCCH) resources.
  • the acknowledgment confirming receipt of the command is transmitted as a Hybrid Automatic Repeat Request (HARQ) acknowledgement in the identified uplink resources.
  • the acknowledgment is transmitted as one taken from the group consisting of: a bit field in Uplink Control Information (UCI) and a Physical Random Access Channel (PRACH) preamble.
  • an uplink resource is one taken from the group consisting of: identified in the downlink control channel and derived based on a resource of the downlink control channel.
  • the command is one taken from the group consisting of: activation of semi-persistent CSI-RS transmission; de-activation of semi-persistent CSI-RS transmission; reconfiguration of one of a periodic and semi-persistent CSI reporting content; dynamic selection of reporting settings; switching of beam pair link; switching a transmit antenna for SRS; and changing a number of beams sets for beam reporting.
  • a user equipment 14 is provided.
  • the processing circuitry 32 is configured to: receive a command in a downlink control channel; determine uplink resources to use to transmit an acknowledgement confirming receipt of the command, the uplink resources being identified by a content of the downlink channel; and transmit the acknowledgement confirming receipt of the command on the identified uplink resources.
  • the acknowledgment confirming receipt of the command is transmitted in a same subframe where the command was received.
  • the command includes at least one downlink control information, DCI, field set to at least one predefined value, the at least one predefined value indicating the command type of the command.
  • the command type includes at least one taken from the group consisting of: CSI-RS activation type, CSI-RS deactivation type, beam switching and SRS transmitting antenna switching type.
  • the at least one DCI field indicates one taken from the group consisting of: at least one parameter for the command, at least one beam pair link and at least one transmission antenna; and the at least one parameter indicates a semi-persistent CSI-RS resource.
  • the identified uplink resources are Physical Uplink Control Channel (PUCCH) resources.
  • the acknowledgment confirming receipt of the command is transmitted as a Hybrid Automatic Repeat Request (HARQ) acknowledgement in the identified uplink resources.
  • the acknowledgment is transmitted as one taken from the group consisting of: a bit field in Uplink Control Information (UCI) and a Physical Random Access Channel (PRACH) preamble.
  • the identified uplink resource is one taken from the group consisting of: identified in the downlink control channel and derived based on a resource of the downlink control channel.
  • the command is one taken from the group consisting of: activation of semi-persistent CSI-RS transmission; de-activation of semi-persistent CSI-RS transmission; reconfiguration of one of a periodic and semi-persistent CSI reporting content; dynamic selection of reporting settings; switching of beam pair link; switching a transmit antenna for SRS; and changing a number of beams sets for beam reporting.
  • a base station 12 is provided.
  • the base station 12 includes processing circuitry 20.
  • the processing circuitry 20 is configured to:
  • a command to communicate to a user equipment 14 determines a command to communicate to a user equipment 14; communicate the command to the user equipment 14 in a downlink control channel, the command identifying uplink resources to use to transmit an acknowledgement; and receive an acknowledgement confirming receipt of the command on the identified uplink resources.
  • the command includes at least one downlink control information, DCI, field set to at least one predefined value, the at least one predefined value indicating the command type of the command.
  • the command type includes at least one taken from the group consisting of: CSI-RS activation type, CSI-RS deactivation type, beam switching and SRS transmitting antenna switching type.
  • the at least one DCI field indicates one taken from the group consisting of: at least one parameter for the command, at least one beam pair link and at least one transmission antenna; and the at least one parameter indicates a semi-persistent CSI-RS resource.
  • the command is one taken from the group consisting of: activation of semi-persistent CSI- RS transmission; de-activation of semi-persistent CSI-RS transmission;
  • dynamic selection of reporting settings switching of beam pair link; switching a transmit antenna for SRS; and changing a number of beams sets for beam reporting.
  • a method for a base station 12 includes determining a command to communicate to user equipment 14 (S 106); communicating the command to user equipment 14 in a downlink control channel (S 108), the command identifying uplink resources to use to transmit an
  • the command includes at least one downlink control information, DCI, field set to at least one predefined value, the at least one predefined value indicating the command type of the command.
  • the command type includes at least one taken from the group of: CSI-RS activation type, CSI-RS deactivation type, beam switching and SRS transmitting antenna switching type.
  • the at least one DCI field indicates one taken from the group consisting of: at least one parameter for the command, at least one beam pair link and at least one transmission antenna; and the at least one parameter indicating a semi-persistent CSI-RS resource.
  • the command is one taken from the group consisting of: activation of semi-persistent CSI-RS transmission; de- activation of semi-persistent CSI-RS transmission; reconfiguration of one of a periodic and semi-persistent CSI reporting content; dynamic selection of reporting settings; switching of beam pair link; switching a transmit antenna for SRS; and changing a number of beams sets for beam reporting.
  • a method is proposed to enable a wireless device to send an acknowledgement to a gNB after receiving a command carried on PDCCH.
  • the method comprises: receiving, by the wireless device, a command in a physical downlink control channel (PDCCH), wherein the command instructs the wireless device to perform a procedure other than DL-SCH reception on PDSCH or UL-SCH transmission on PUSCH; determining, by the wireless device, uplink resources for transmission of an Acknowledgement, the uplink resources being identified by the content of the
  • PDCCH physical downlink control channel
  • Embodiment 1A further comprising transmitting, by the wireless device, the Acknowledgement of receiving the command in the same slot as the slot wherein the PDCCH is received.
  • 3A The method of Embodiment 1 A, wherein the PDCCH is a regular data scheduling PDCCH with certain DCI fields set to a set of predefined values with each set corresponding to one command type.
  • the PDCCH is different from a regular data scheduling PDCCH and comprises of at least one of the following DCI fields: a field to indicate the command type, wherein the command types can include at least one of CSI-RS activation/deactivation, beam switching, SRS Tx antenna switching; a field to indicate an ACK resource in the uplink, a field to indicate the parameters for the command such as a semi-persistent CSI-RS resource, a beam pair link or links, or Tx antennas.
  • the command types can include at least one of CSI-RS activation/deactivation, beam switching, SRS Tx antenna switching
  • a field to indicate an ACK resource in the uplink a field to indicate the parameters for the command such as a semi-persistent CSI-RS resource, a beam pair link or links, or Tx antennas.
  • Embodiment 5A The method of Embodiment 4A, wherein the PDCCH does not contain DCI fields for data scheduling.
  • Embodiment 6A The method of Embodiment 1A and 3A, wherein the detecting comprises determining whether the PDCCH is a regular data scheduling PDCH or a PDCH carrying a command.
  • Embodiment 7A The method of Embodiment 1A to 6A, wherein the detecting further comprises determining the command type.
  • Embodiment 8A The method of Embodiment 1A, wherein the Acknowledgement is transmitted as a HARQ ACK in an uplink resource.
  • 9A The method of Embodiment 1A, wherein the Acknowledgement is transmitted as one of a bit field in UCI and a PRACH preamble.
  • 10A The method of Embodiment 1A to 8A, wherein the uplink resource is either signaled in the PDCCH, derived based on the PDCCH resource, or preconfigured by higher layers.
  • Embodiment 11 A The method of Embodiment 1 A, wherein the Acknowledgement is different from a HARQ ACK.
  • Embodiment 12A The method of Embodiment 1A, wherein the receiving comprises detecting the presence of the acknowledgement in the uplink resource.
  • Embodiment 13A The method of Embodiment 1A, wherein the command is at least one of the following: activation of semi-persistent CSI-RS transmission; de-activation of semi-persistent CSI-RS transmission; reconfiguration of a periodic or a semi-persistent CSI reporting contents; dynamic selection of reporting settings; switching of a beam pair link; switching a transmit antenna for SRS; and changing the number of beam sets/groups for beam reporting.
  • the concepts described herein may be embodied as a method, data processing system, and/or computer program product. Accordingly, the concepts described herein may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects all generally referred to herein as a "circuit" or "module.” Furthermore, the disclosure may take the form of a computer program product on a tangible computer usable storage medium having computer program code embodied in the medium that can be executed by a computer. Any suitable tangible computer readable medium may be utilized including hard disks, CD-ROMs, electronic storage devices, optical storage devices, or magnetic storage devices.
  • These computer program instructions may also be stored in a computer readable memory or storage medium that can direct a computer or other
  • the computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
  • Computer program code for carrying out operations of the concepts described herein may be written in an object-oriented programming language such as Java® or C++.
  • the computer program code for carrying out operations of the disclosure may also be written in conventional procedural programming languages, such as the "C" programming language.
  • the program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer.
  • the remote computer may be connected to the user's computer through a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).
  • LAN local area network
  • WAN wide area network
  • Internet Service Provider for example, AT&T, MCI, Sprint, EarthLink, MSN, GTE, etc.

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

Abstract

L'invention concerne un équipement d'utilisateur, une station de base, et un procédé pour un canal de commande de liaison descendante avec confirmation rapide. Une instruction est reçue dans un canal de commande de liaison descendante. Des ressources de liaison montante devant être utilisées pour transmettre un accusé de réception confirmant la réception de l'instruction sont déterminées. Les ressources de liaison montante sont identifiées par un contenu du canal de liaison descendante. L'accusé de réception est transmis pour confirmer la réception de l'instruction sur les ressources de liaison montante identifiées.
PCT/IB2018/054433 2017-06-16 2018-06-15 Envoi d'instructions dans un canal de commande de liaison descendante WO2018229727A1 (fr)

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CN111435900A (zh) * 2019-02-20 2020-07-21 维沃移动通信有限公司 资源配置的方法和设备
US10893516B2 (en) 2017-09-18 2021-01-12 Qualcomm Incorporated Transmission of beam switch commands through control channel signaling
CN113647045A (zh) * 2019-03-29 2021-11-12 瑞典爱立信有限公司 新无线电辅小区激活期间的快速信道状态信息
WO2023039700A1 (fr) * 2021-09-14 2023-03-23 Zte Corporation Systèmes et procédés pour un schéma de transmission en liaison montante dans un fonctionnement multi-trp
CN116569492A (zh) * 2020-12-04 2023-08-08 高通股份有限公司 促成每个上行链路控制信道资源的双工模式

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US20130039290A1 (en) * 2011-08-11 2013-02-14 Research In Motion Korea Method and System for Uplink Control Channel Transmit Diversity Using Multiple Downlink Control Channel Based Resource Allocation
US20150208391A1 (en) * 2012-08-06 2015-07-23 Kt Corporation Method for transmitting control information on transmission points and corresponding transmission point, as well as method for mapping uplink control channel resource of terminal and corresponding terminal

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US20130039290A1 (en) * 2011-08-11 2013-02-14 Research In Motion Korea Method and System for Uplink Control Channel Transmit Diversity Using Multiple Downlink Control Channel Based Resource Allocation
US20150208391A1 (en) * 2012-08-06 2015-07-23 Kt Corporation Method for transmitting control information on transmission points and corresponding transmission point, as well as method for mapping uplink control channel resource of terminal and corresponding terminal

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10893516B2 (en) 2017-09-18 2021-01-12 Qualcomm Incorporated Transmission of beam switch commands through control channel signaling
US11638244B2 (en) 2017-09-18 2023-04-25 Qualcomm Incorporated Transmission of beam switch commands through control channel signaling
CN111435900A (zh) * 2019-02-20 2020-07-21 维沃移动通信有限公司 资源配置的方法和设备
CN113647045A (zh) * 2019-03-29 2021-11-12 瑞典爱立信有限公司 新无线电辅小区激活期间的快速信道状态信息
CN113647045B (zh) * 2019-03-29 2024-03-08 瑞典爱立信有限公司 新无线电辅小区激活期间的快速信道状态信息
CN116569492A (zh) * 2020-12-04 2023-08-08 高通股份有限公司 促成每个上行链路控制信道资源的双工模式
WO2023039700A1 (fr) * 2021-09-14 2023-03-23 Zte Corporation Systèmes et procédés pour un schéma de transmission en liaison montante dans un fonctionnement multi-trp

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