WO2020091669A1 - Configuration of hybrid automatic repeat request (harq) opportunities - Google Patents

Configuration of hybrid automatic repeat request (harq) opportunities Download PDF

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Publication number
WO2020091669A1
WO2020091669A1 PCT/SE2019/051073 SE2019051073W WO2020091669A1 WO 2020091669 A1 WO2020091669 A1 WO 2020091669A1 SE 2019051073 W SE2019051073 W SE 2019051073W WO 2020091669 A1 WO2020091669 A1 WO 2020091669A1
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WO
WIPO (PCT)
Prior art keywords
harq
ack
opportunities
sequence
wireless device
Prior art date
Application number
PCT/SE2019/051073
Other languages
French (fr)
Inventor
Bikramjit Singh
Jonas FRÖBERG OLSSON
Kittipong KITTICHOKECHAI
Yufei Blankenship
Majid GERAMI
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to TW108139685A priority Critical patent/TW202023221A/en
Publication of WO2020091669A1 publication Critical patent/WO2020091669A1/en

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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
    • H04L1/12—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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1864—ARQ related signaling

Definitions

  • the present disclosure relates to wireless communications and, in particular, to configuration of Hybrid Automatic Repeat Request- Acknowledgment (HARQ-ACK) opportunities in the physical uplink channel.
  • HARQ-ACK Hybrid Automatic Repeat Request- Acknowledgment
  • PUCCH Physical Uplink Control Channel
  • Hybrid automatic repeat request is a method for error correction and control in communication systems.
  • 3GPP Third Generation Partnership Project
  • NR New Radio
  • the wireless device e.g., user equipment/UE
  • HARQ Hybrid automatic repeat request
  • ACK Acknowledgment
  • the wireless device determines a PUCCH resource based on the number of HARQ-ACK information bits and the PUCCH resource indicator field in a last DCI format 1 0 or DCI format 1 1 that have a value of Physical Downlink Shared Channel (PDSCH)-to-HARQ feedback timing indicator indicating a same slot for the PUCCH transmission (as described for example in Third Generation
  • PDSCH Physical Downlink Shared Channel
  • a wireless device determines a PUCCH resource after determining a set of PUCCH resources for ⁇ UCI HARQ-ACK information bits, as described in 3GPP TS 38.213 Subclause 9.2.1.
  • the PUCCH resource determination is based on a PUCCH resource indicator field as (as described in 3GPP TS 38.212) in a last DCI format 1 0 or DCI format 1 1, among the DCI formats 1 0 or DCI formats 1 1 that have a value of a PDSCH-to- HARQ feedback timing indicator field indicating a same slot for the PUCCH transmission, that the wireless device detects and for which the wireless device transmits corresponding HARQ-ACK information in the PUCCH where, for PUCCH resource determination, detected DCI formats are first indexed in an ascending order across serving cells indexes and are then indexed in an ascending order across Physical Downlink Control Channel (PDCCH) monitoring occasion indexes.
  • PDCH Physical Downlink Control Channel
  • the PUCCH resource indicator field values map to values of a set of PUCCH resource indexes, as defined in Table 1, provided by higher layer parameter
  • the wireless device determines a PUCCH resource with index rpucCH 0— r PUCCH— ⁇ PUCCH 1 as
  • CCEs Control Channel Elements
  • Subclause 10.1 of, for example, 3GPP TS 38.212 CCE p is the index of a first CCE for the PDCCH reception, and ⁇ PRI is a value of the PUCCH resource indicator field in the DCI format 1 0 or DCI format 1 1.
  • Table 1 Mapping of PUCCH resource indication field values to a PUCCH resource in a PUCCH resource set with maximum 8 PUCCH resources
  • NR 3 GPP Release (Rel)-l5 there are two wireless device capabilities, Capability 1 and Capability 2, where Capability 2 has the faster processing (as described for example in 3GPP TS 38.214, Section 5.3):
  • the wireless device may provide a valid HARQ-ACK message.
  • - Ni is based on m of table 2 and table 3 (below) for wireless device
  • m corresponds to the one of ( ipDCCH , m / ⁇ )8 ⁇ / /, m ⁇ ⁇ .) resulting with the largest T pr0c,i , where the m ⁇ ' ⁇ c i n corresponds to the subcarrier spacing of the PDCCH scheduling the PDSCH, the mrr X ai corresponds to the subcarrier spacing of the scheduled PDSCH, and m UL corresponds to the subcarrier spacing of the uplink channel with which the HARQ-ACK is to be transmitted, and k is defined in subclause 4.41 of 3GPP TS 38.211.
  • the wireless device is configured with multiple active component
  • the first uplink symbol which carries the HARQ-ACK information further includes the effect of timing difference between the component carriers as described in 3GPP TS 38.133.
  • mapping type B as given in subclause 7.4.1.1 of 3GPP TS 38.211, and
  • mapping type B as given in subclause 7.4.1.1 of 3GPP TS 38.211,
  • dpi 0, o if the number of PDSCH symbols allocated is 4, then dpi is the number of overlapping symbols of the scheduling PDCCH and the scheduled PDSCH,
  • ⁇ otherwise di is the number of overlapping symbols of the scheduling PDCCH and the scheduled PDSCH.
  • the wireless device may skip decoding a number of PDSCHs with last symbol within 10 symbols before the start of a PDSCH that is scheduled to follow
  • Capability 2 if any of those PDSCHs are scheduled with more than 136 RBs with 30kHz SCS and following Capability 1 processing time.
  • HARQ-ACK is multiplexed following the procedure in subclause 9.2.5 of 3GPP TS 38.213, otherwise the HARQ-ACK message is transmitted on PUCCH.
  • the wireless device may not provide a valid HARQ-ACK corresponding to the scheduled PDSCH.
  • Tproc,l is used both in the case of normal and extended cyclic prefix.
  • Some embodiments advantageously provide methods, systems, network nodes and wireless devices for configuration of HARQ-ACK opportunities in the physical uplink channel.
  • the configuration defines a periodicity of the HARQ-ACK opportunities.
  • a method for a wireless device that is configured for opportunities to receive communication on a physical downlink shared channel, PDSCH, within a slot.
  • the method includes receiving an indication of a sequence of Hybrid Automatic Repeat reQuest
  • the method includes receiving on the PDSCH in one of the opportunities within the slot.
  • the method includes determining a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device, based on the one of the opportunities for receiving on the PDSCH in which the PDSCH is received.
  • the method includes transmitting a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in response to the receiving on the PDSCH.
  • the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols.
  • the sequence of HARQ-ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier.
  • determining the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities further includes determining the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities that is an earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being determined based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device.
  • receiving the indication of the sequence of HARQ-ACK opportunities within the slot further includes receiving an indication of a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot.
  • the sequence of HARQ-ACK opportunities corresponds to the opportunities for receiving on the PDSCH.
  • the method further includes receiving an indication of a subpattem of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities.
  • the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
  • the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities.
  • receiving the indication of the sequence of HARQ-ACK opportunities further includes receiving the indication in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
  • a wireless device that is configured for opportunities to receive communication on a physical downlink shared channel, PDSCH, within a slot.
  • the wireless device includes processing circuitry.
  • the processing circuitry is configured to cause the wireless device to receive an indication of a sequence of Hybrid Automatic Repeat reQuest
  • the processing circuitry is configured to cause the wireless device to receive on the PDSCH in one of the opportunities within the slot.
  • the processing circuitry is configured to cause the wireless device to determine a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device, based on the one of the opportunities for receiving on the PDSCH in which the PDSCH is received.
  • the processing circuitry is configured to cause the wireless device to transmit a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in response to the receiving on the PDSCH.
  • the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols.
  • the sequence of HARQ-ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier.
  • the processing circuitry is further configured to cause the wireless device to determine the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities by being configured to cause the wireless device to determine the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities that is an earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being determined based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device.
  • the processing circuitry is further configured to cause the wireless device to receive the indication of the sequence of HARQ-ACK opportunities within the slot by being configured to cause the wireless device to receive an indication of a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot.
  • the sequence of HARQ-ACK opportunities corresponds to the opportunities for receiving on the PDSCH.
  • the processing circuitry is further configured to cause the wireless device to receive an indication of a subpattern of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities.
  • the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
  • the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities.
  • the processing circuitry is further configured to cause the wireless device to receive the indication of the sequence of HARQ-ACK
  • a method for a network node that is configured for opportunities to transmit communication on a physical downlink shared channel, PDSCH, within a slot to the wireless device.
  • the method includes indicating a sequence of Hybrid Automatic Repeat reQuest Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device.
  • the method includes transmitting on the PDSCH in one of the opportunities within the slot.
  • the method includes determining a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device, based on the one of the opportunities for transmitting on the PDSCH in which the PDSCH is transmitted.
  • the method includes, as a result of transmitting on the PDSCH, receiving a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities for the wireless device.
  • the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols.
  • the sequence of HARQ-ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier.
  • receiving the HARQ-ACK further includes receiving the HARQ-ACK in the physical uplink channel at the earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device.
  • indicating the sequence of HARQ-ACK opportunities within the slot further includes indicating a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot.
  • the sequence of HARQ-ACK opportunities corresponds to the opportunities for transmitting on the PDSCH.
  • the method further includes indicating a subpattern of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities.
  • the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
  • the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities.
  • opportunities further includes indicating the sequence of HARQ-ACK opportunities in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
  • a network node that is configured for opportunities to transmit communication on a physical downlink shared channel, PDSCH, within a slot to the wireless device.
  • the network node comprises processing circuitry.
  • the processing circuitry is configured to cause the network node to indicate a sequence of Hybrid Automatic Repeat reQuest
  • the processing circuitry is configured to cause the network node to transmit on the PDSCH in one of the opportunities within the slot.
  • the processing circuitry is configured to cause the network node to determine a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device, based on the one of the opportunities for transmitting on the PDSCH in which the PDSCH is transmitted.
  • the processing circuitry is configured to cause the network node to, as a result of the transmission on the PDSCH, receive a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities for the wireless device.
  • the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols.
  • the sequence of HARQ-ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier.
  • the processing circuitry is further configured to cause the network node to receive the HARQ-ACK by being configured to cause the network node to receive the HARQ-ACK in the physical uplink channel at the earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device.
  • the processing circuitry is further configured to cause the network node to indicate the sequence of HARQ-ACK opportunities within the slot by being configured to cause the network node to indicate a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot.
  • the sequence of HARQ-ACK opportunities corresponds to the opportunities for transmitting on the PDSCH.
  • the processing circuitry is further configured to cause the network node to indicate a subpattem of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities.
  • the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
  • the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities.
  • the processing circuitry is further configured to cause the network node to indicate the sequence of HARQ-ACK opportunities by being configured to cause the network node to indicate the sequence of HARQ-ACK opportunities in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
  • FIG. 1 is a schematic diagram of an exemplary network architecture illustrating a communication system connected via an intermediate network to a host computer according to the principles in the present disclosure
  • FIG. 2 is a block diagram of a host computer communicating via a network node with a wireless device over an at least partially wireless connection according to some embodiments of the present disclosure
  • FIG. 3 is a flowchart illustrating exemplary methods implemented in a communication system including a host computer, a network node and a wireless device for executing a client application at a wireless device according to some embodiments of the present disclosure
  • FIG. 4 is a flowchart illustrating exemplary methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data at a wireless device according to some embodiments of the present disclosure
  • FIG. 5 is a flowchart illustrating exemplary methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data from the wireless device at a host computer according to some embodiments of the present disclosure
  • FIG. 6 is a flowchart illustrating exemplary methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data at a host computer according to some embodiments of the present disclosure
  • FIG. 7 is a flowchart of an exemplary process in a network node according to some embodiments of the present disclosure.
  • FIG. 8 is a flowchart of an exemplary process in a wireless device according to some embodiments of the present disclosure.
  • FIG. 9 is diagram of a short PUCCH with five PUCCH resources defined in a slot according to some embodiments of the present disclosure.
  • FIG. 10 is a diagram of short PUCCH where four PUCCH resources are defined in a slot according to some embodiments of the present disclosure
  • FIG. 11 is a diagram of short PUCCH where four PUCCH resources are defined in a slot with inter-slot frequency hopping according to some embodiments of the present disclosure
  • FIG. 12 is a diagram of long PUCCH where three PUCCH resources are defined in the slot according to some embodiments of the present disclosure
  • FIG. 13 is a diagram of a short PUCCH where PUCCH resources are defined according to some embodiments of the present disclosure
  • FIG. 14 is a diagram of short PUCCH that occupies 1 OFDM symbol where PUCCH resources are defined according to some embodiments of the present disclosure.
  • EIRLLC ETltra-reliable low latency communication
  • the wireless device may be configured with several PETCCH resources that enable the possibility for multiple opportunities of HARQ-ACK transmissions within a slot although only one of the HARQ-ACK transmission opportunities may be used in each slot.
  • a wireless device running EIRLLC service may be configured with the possibility of receiving PDCCH in every second Orthogonal Frequency Division Multiplex
  • OFDM OFDM
  • symbols 0, 2, 4, ..., 12 PUCCH resources for HARQ-ACK transmission also in every second symbol, e.g., symbols 1, 3, ...., 13.
  • the wireless device may be configured with a list of 7 PUCCH resources just for possible HARQ-ACK reporting for URLLC. Since there may be a need to have other PUCCH resources for other needs, the list of at most 8 PUCCH resources, for example, that can be explicitly indicated by PUCCH resource indicator in the downlink control information (DCI) may likely be exceeded. If there are more than 8 PUCCH resources in the list, the index of first CCE may control which PUCCH resource is indicated.
  • DCI downlink control information
  • the locations where the DCI can be transmitted may be limited in order to be able to reference an intended PUCCH resource.
  • this limitation in the locations of DCI may impose scheduling restrictions on where the DCI can be transmitted and may potentially cause “blocking” if the DCI cannot be sent on a desired CCE (due to that it is already used for some other UE).
  • Some embodiments of the instant disclosure may advantageously help solve at least a portion of the problem described above by providing periodicity in HARQ- ACK opportunities such as, in one or more embodiments, configuring a sequence of HARQ-ACK opportunities.
  • HARQ- ACK opportunity may refer to one or more resources/time resources (e.g., OFDM symbols) that may be available for the wireless device 22 to transmit HARQ-ACK (an example of feedback).
  • relational terms such as“first” and“second,”“top” and “bottom,” and the like, may be used solely to distinguish one entity or element from another entity or element without necessarily requiring or implying any physical or logical relationship or order between such entities or elements.
  • the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the concepts described herein.
  • the singular forms“a”,“an” and“the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • 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.
  • the term“coupled,”“connected,” and the like may be used herein to indicate a connection, although not necessarily directly, and may include wired and/or wireless connections.
  • network node 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), g Node B (gNB), evolved Node B (eNB or eNodeB), Node B, multi-standard radio (MSR) radio node such as MSR BS, multi-cell/multicast coordination entity (MCE), relay node, donor node controlling relay, radio access point (AP), transmission points, transmission nodes, Remote Radio Unit (RRU) Remote Radio Head (RRH), a core network node (e.g., mobile management entity (MME), self-organizing network (SON) node, a coordinating node, positioning node, MDT node, etc.), an external node (e.g., 3rd party node, a node external to the current network), nodes in distributed antenna system (DAS), a spectrum access system (SAS) no
  • BS base station
  • wireless device or a user equipment (UE) are used interchangeably.
  • the WD herein can be any type of wireless device capable of communicating with a network node or another WD over radio signals, such as wireless device (WD).
  • the WD may also be a radio communication device, target device, device to device (D2D) WD, machine type WD or WD capable of machine to machine communication (M2M), low-cost and/or low-complexity WD, a sensor equipped with WD, Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles, Customer
  • CPE Premises Equipment
  • IoT Internet of Things
  • NB-IOT Narrowband IoT
  • the generic term“radio network node” is used. It can be any kind of a radio network node which may comprise any of base station, radio base station, base transceiver station, base station controller, network controller, RNC, evolved Node B (eNB), Node B, gNB, Multi-cell/multicast Coordination Entity (MCE), relay node, access point, radio access point, Remote Radio Unit (RRU) Remote Radio Head (RRH).
  • RNC evolved Node B
  • MCE Multi-cell/multicast Coordination Entity
  • RRU Remote Radio Unit
  • RRH Remote Radio Head
  • resource used herein may correspond to any type of physical resource or radio resource expressed in terms of length of time and/or frequency. Signals are transmitted or received by a radio node over a time resource. Examples of time resources are: symbol, time slot, subframe, radio frame, Transmission Time Interval (TTI), interleaving time, etc.
  • TTI Transmission Time Interval
  • time resource used herein may correspond to any type of physical resource or radio resource expressed in terms of length of time. Examples of time resources are: symbol, time slot, subframe, radio frame, TTI, interleaving time, etc.
  • the term“resource” is intended to indicate either a frequency resource, and/or a time resource.
  • a resource element may represent a smallest time-frequency resource, e.g. representing the time and frequency range covered by one symbol or a number of bits represented in a common modulation.
  • a resource element may e.g. cover a symbol time length and a subcarrier, in particular in 3GPP, NR and/or LTE standards.
  • a data transmission may represent and/or pertain to transmission of specific data, e.g. a specific block of data and/or transport block.
  • Implicit indication may for example be based on position and/or resource used for transmission.
  • Explicit indication may for example be based on a parametrization with one or more parameters, and/or one or more index or indices, and/or one or more bit patterns representing the information. It may in particular be considered that control signaling as described herein, based on the utilized resource sequence, implicitly indicates the control signaling type.
  • Configuring a terminal or wireless device or node may involve instructing and/or causing the wireless device or node to change its configuration, e.g., at least one setting and/or register entry and/or operational mode.
  • a terminal or wireless device or node may be adapted to configure itself, e.g., according to information or data in a memory of the terminal or wireless device.
  • Configuring a node or terminal or wireless device by another device or node or a network may refer to and/or comprise transmitting information and/or data and/or instructions to the wireless device or node by the other device or node or the network, e.g., allocation data (which may also be and/or comprise configuration data) and/or scheduling data and/or scheduling grants.
  • Configuring a terminal may include sending allocation/configuration data to the terminal indicating which modulation and/or encoding to use.
  • a terminal may be configured with and/or for scheduling data and/or to use, e.g., for transmission, scheduled and/or allocated uplink resources, and/or, e.g., for reception, scheduled and/or allocated downlink resources.
  • Uplink resources and/or downlink resources may be scheduled and/or provided with allocation or configuration data.
  • configuring may include determining configuration data representing the configuration and providing, e.g. transmitting, it to one or more other nodes (parallel and/or sequentially), which may transmit it further to the radio node (or another node, which may be repeated until it reaches the wireless device).
  • configuring a radio node may include receiving configuration data and/or data pertaining to configuration data, e.g., from another node like a network node, which may be a higher-level node of the network, and/or transmitting received configuration data to the radio node. Accordingly, determining a configuration and transmitting the configuration data to the radio node may be performed by different network nodes or entities, which may be able to communicate via a suitable interface, e.g., an X2 interface in the case of LTE or a corresponding interface for NR.
  • Configuring a terminal e.g. WD
  • configuring a terminal may comprise configuring the WD to perform certain measurements on certain subframes or radio resources and reporting such measurements according to embodiments of the present disclosure.
  • the transmitter is the WD and the receiver is the network node.
  • WCDMA Wide Band Code Division Multiple Access
  • WiMax Worldwide Interoperability for Microwave Access
  • UMB Ultra Mobile Broadband
  • GSM Global System for Mobile Communications
  • functions described herein as being performed by a wireless device or a network node may be distributed over a plurality of wireless devices and/or network nodes.
  • the functions of the network node and wireless device described herein are not limited to performance by a single physical device and, in fact, can be distributed among several physical devices.
  • Embodiments provide configurations of HARQ-ACK opportunities in the physical uplink channel.
  • FIG. 1 a schematic diagram of a
  • the access network 12 comprises a plurality of network nodes l6a, l6b, l6c (referred to collectively as network nodes 16), such as NBs, eNBs, gNBs or other types of wireless access points, each defining a corresponding coverage area l8a, 18b, l8c (referred to collectively as coverage areas 18).
  • network nodes 16 such as NBs, eNBs, gNBs or other types of wireless access points, each defining a corresponding coverage area l8a, 18b, l8c (referred to collectively as coverage areas 18).
  • Each network node l6a, l6b, l6c is connectable to the core network 14 over a wired or wireless connection 20.
  • a first wireless device (WD) 22a located in coverage area l8a is configured to wirelessly connect to, or be paged by, the corresponding network node l6a.
  • a second WD 22b in coverage area 18b is wirelessly connectable to the corresponding network node l6b. While a plurality of WDs 22a, 22b (collectively referred to as wireless devices 22) are illustrated in this example, the disclosed embodiments are equally applicable to a situation where a sole WD is in the coverage area or where a sole WD is connecting to the corresponding network node 16. Note that although only two WDs 22 and three network nodes 16 are shown for convenience, the communication system may include many more WDs 22 and network nodes 16.
  • a WD 22 can be in simultaneous communication and/or configured to separately communicate with more than one network node 16 and more than one type of network node 16.
  • a WD 22 can have dual connectivity with a network node 16 that supports LTE and the same or a different network node 16 that supports NR.
  • WD 22 can be in communication with an eNB for LTE/E-UTRAN and a gNB for NR/NG-RAN.
  • the communication system 10 may itself be connected to a host computer 24, which may be embodied in the hardware and/or software of a standalone server, a cloud-implemented server, a distributed server or as processing resources in a server farm.
  • the host computer 24 may be under the ownership or control of a service provider, or may be operated by the service provider or on behalf of the service provider.
  • the connections 26, 28 between the communication system 10 and the host computer 24 may extend directly from the core network 14 to the host computer 24 or may extend via an optional intermediate network 30.
  • the intermediate network 30 may be one of, or a combination of more than one of, a public, private or hosted network.
  • the intermediate network 30, if any, may be a backbone network or the Internet. In some embodiments, the intermediate network 30 may comprise two or more sub-networks (not shown).
  • the communication system of FIG. 1 as a whole enables connectivity between one of the connected WDs 22a, 22b and the host computer 24.
  • the connectivity may be described as an over-the-top (OTT) connection.
  • the host computer 24 and the connected WDs 22a, 22b are configured to communicate data and/or signaling via the OTT connection, using the access network 12, the core network 14, any intermediate network 30 and possible further infrastructure (not shown) as intermediaries.
  • the OTT connection may be transparent in the sense that at least some of the participating communication devices through which the OTT connection passes are unaware of routing of uplink and downlink communications.
  • a network node 16 may not or need not be informed about the past routing of an incoming downlink communication with data originating from a host computer 24 to be forwarded (e.g., handed over) to a connected WD 22a. Similarly, the network node 16 need not be aware of the future routing of an outgoing uplink communication originating from the WD 22a towards the host computer 24.
  • a network node 16 is configured to include a feedback unit 32 which is configured to one or more of: indicate a sequence of Hybrid Automatic Repeat reQuest Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device 22; transmit on the PDSCH in one of the opportunities within the slot; determine a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device 22, based on the one of the opportunities for transmitting on the PDSCH in which the PDSCH is transmitted; and as a result of the transmission on the PDSCH, receive a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in the sequence of HARQ- ACK opportunities for the wireless device 22.
  • the feedback unit 32 is configured to receive HARQ-ACK (an example of feedback) according to a sequence of HARQ-ACK opportunities.
  • a wireless device 22 is configured to include a determination unit 34 which is configured to one or more of: receive an indication of a sequence of Hybrid
  • HARQ-ACK Automatic Repeat reQuest Acknowledgement
  • the determination unit 34 is configured to transmit HARQ-ACK (an example of feedback) according to a sequence of HARQ-ACK opportunities.
  • a host computer 24 comprises hardware (HW) 38 including a communication interface 40 configured to set up and maintain a wired or wireless connection with an interface of a different communication device of the communication system 10.
  • the host computer 24 further comprises processing circuitry 42, which may have storage and/or processing capabilities.
  • the processing circuitry 42 may include a processor 44 and memory 46.
  • the processing circuitry 42 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) adapted to execute instructions.
  • processors and/or processor cores and/or FPGAs Field Programmable Gate Array
  • ASICs Application Specific Integrated Circuitry
  • the processor 44 may be configured to access (e.g., write to and/or read from) memory 46, 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 46 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).
  • Processing circuitry 42 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by host computer 24.
  • Processor 44 corresponds to one or more processors 44 for performing host computer 24 functions described herein.
  • the host computer 24 includes memory 46 that is configured to store data, programmatic software code and/or other information described herein.
  • the software 48 and/or the host application 50 may include instructions that, when executed by the processor 44 and/or processing circuitry 42, causes the processor 44 and/or processing circuitry 42 to perform the processes described herein with respect to host computer 24.
  • the instructions may be software associated with the host computer 24.
  • the software 48 may be executable by the processing circuitry 42.
  • the software 48 includes a host application 50.
  • the host application 50 may be operable to provide a service to a remote user, such as a WD 22 connecting via an OTT connection 52 terminating at the WD 22 and the host computer 24.
  • the host application 50 may provide user data which is transmitted using the OTT connection 52.
  • The“user data” may be data and information described herein as implementing the described functionality.
  • the host computer 24 may be configured for providing control and functionality to a service provider and may be operated by the service provider or on behalf of the service provider.
  • the processing circuitry 42 of the host computer 24 may enable the host computer 24 to observe, monitor, control, transmit to and/or receive from the network node 16 and or the wireless device 22.
  • the processing circuitry 42 of the host computer 24 may include an information unit 54 configured to enable the service provider to one or more of provide, transmit, receive, determine information related to a sequence of HARQ-ACK opportunities.
  • the communication system 10 further includes a network node 16 provided in a communication system 10 and including hardware 58 enabling it to communicate with the host computer 24 and with the WD 22.
  • the hardware 58 may include a communication interface 60 for setting up and maintaining a wired or wireless connection with an interface of a different communication device of the
  • the radio interface 62 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and/or one or more RF transceivers.
  • the communication interface 60 may be configured to facilitate a connection 66 to the host computer 24.
  • the connection 66 may be direct or it may pass through a core network 14 of the communication system 10 and/or through one or more intermediate networks 30 outside the communication system 10.
  • the hardware 58 of the network node 16 further includes processing circuitry 68.
  • the processing circuitry 68 may include a processor 70 and a memory 72.
  • the processing circuitry 68 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) adapted to execute instructions.
  • FPGAs Field Programmable Gate Array
  • ASICs Application Specific Integrated Circuitry
  • the processor 70 may be configured to access (e.g., write to and/or read from) the memory 72, 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).
  • 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).
  • the network node 16 further has software 74 stored internally in, for example, memory 72, or stored in external memory (e.g., database, storage array, network storage device, etc.) accessible by the network node 16 via an external connection.
  • the software 74 may be executable by the processing circuitry 68.
  • the processing circuitry 68 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by network node 16.
  • Processor 70 corresponds to one or more processors 70 for performing network node 16 functions described herein.
  • the memory 72 is configured to store data, programmatic software code and/or other information described herein.
  • the software 74 may include instructions that, when executed by the processor 70 and/or processing circuitry 68, causes the processor 70 and/or processing circuitry 68 to perform the processes described herein with respect to network node 16.
  • processing circuitry 68 of the network node 16 may include feedback unit 32 configured to receive HARQ-ACK (an example of feedback) according to a sequence of HARQ-ACK opportunities.
  • the communication system 10 further includes the WD 22 already referred to.
  • the WD 22 may have hardware 80 that may include a radio interface 82 configured to set up and maintain a wireless connection 64 with a network node 16 serving a coverage area 18 in which the WD 22 is currently located.
  • the radio interface 82 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and/or one or more RF transceivers.
  • the hardware 80 of the WD 22 further includes processing circuitry 84.
  • the processing circuitry 84 may include a processor 86 and memory 88.
  • the processing circuitry 84 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) adapted to execute instructions.
  • the processor 86 may be configured to access (e.g., write to and/or read from) memory 88, 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 88 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).
  • the WD 22 may further comprise software 90, which is stored in, for example, memory 88 at the WD 22, or stored in external memory (e.g., database, storage array, network storage device, etc.) accessible by the WD 22.
  • the software 90 may be executable by the processing circuitry 84.
  • the software 90 may include a client application 92.
  • the client application 92 may be operable to provide a service to a human or non-human user via the WD 22, with the support of the host computer 24.
  • an executing host application 50 may communicate with the executing client application 92 via the OTT connection 52 terminating at the WD 22 and the host computer 24.
  • the client application 92 may receive request data from the host application 50 and provide user data in response to the request data.
  • the OTT connection 52 may transfer both the request data and the user data.
  • the client application 92 may interact with the user to generate the user data that it provides.
  • the processing circuitry 84 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by WD 22.
  • the processor 86 corresponds to one or more processors 86 for performing WD 22 functions described herein.
  • the WD 22 includes memory 88 that is configured to store data, programmatic software code and/or other information described herein.
  • the software 90 and/or the client application 92 may include instructions that, when executed by the processor 86 and/or processing circuitry 84, causes the processor 86 and/or processing circuitry 84 to perform the processes described herein with respect to WD 22.
  • the processing circuitry 84 of the wireless device 22 may include a determination unit 34 configured to transmit HARQ-ACK (an example of feedback) according to a sequence of HARQ-ACK opportunities.
  • the inner workings of the network node 16, WD 22, and host computer 24 may be as shown in FIG. 2 and independently, the surrounding network topology may be that of FIG. 1.
  • the OTT connection 52 has been drawn abstractly to illustrate the communication between the host computer 24 and the wireless device 22 via the network node 16, without explicit reference to any intermediary devices and the precise routing of messages via these devices.
  • Network infrastructure may determine the routing, which it may be configured to hide from the WD 22 or from the service provider operating the host computer 24, or both. While the OTT connection 52 is active, the network infrastructure may further take decisions by which it dynamically changes the routing (e.g., on the basis of load balancing consideration or
  • the wireless connection 64 between the WD 22 and the network node 16 is in accordance with the teachings of the embodiments described throughout this disclosure.
  • One or more of the various embodiments improve the performance of OTT services provided to the WD 22 using the OTT connection 52, in which the wireless connection 64 may form the last segment. More precisely, the teachings of some of these embodiments may improve the data rate, latency, and/or power consumption and thereby provide benefits such as reduced user waiting time, relaxed restriction on file size, better responsiveness, extended battery lifetime, etc.
  • a measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve.
  • the measurement procedure and/or the network functionality for reconfiguring the OTT connection 52 may be implemented in the software 48 of the host computer 24 or in the software 90 of the WD 22, or both.
  • sensors (not shown) may be deployed in or in association with communication devices through which the OTT connection 52 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which software 48, 90 may compute or estimate the monitored quantities.
  • the reconfiguring of the OTT connection 52 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not affect the network node 16, and it may be unknown or imperceptible to the network node 16. Some such procedures and functionalities may be known and practiced in the art.
  • measurements may involve proprietary WD signaling facilitating the host computer’s 24 measurements of throughput, propagation times, latency and the like.
  • the measurements may be implemented in that the software 48, 90 causes messages to be transmitted, in particular empty or ‘dummy’ messages, using the OTT connection 52 while it monitors propagation times, errors etc.
  • the host computer 24 includes processing circuitry 42 configured to provide user data and a communication interface 40 that is configured to forward the user data to a cellular network for transmission to the WD 22.
  • the cellular network also includes the network node 16 with a radio interface 62.
  • the network node 16 is configured to, and/or the network node’s 16 processing circuitry 68 is configured to perform the functions and/or methods described herein for
  • the host computer 24 includes processing circuitry 42 and a communication interface 40 that is configured to a communication interface 40 configured to receive user data originating from a transmission from a WD 22 to a network node 16.
  • the WD 22 is configured to, and/or comprises a radio interface 82 and/or processing circuitry 84 configured to perform the functions and/or methods described herein for
  • FIGS. 1 and 2 show various“units” such as feedback unit 32, and determination unit 34 as being within a respective processor, it is contemplated that these units may be implemented such that a portion of the unit is stored in a corresponding memory within the processing circuitry. In other words, the units may be implemented in hardware or in a combination of hardware and software within the processing circuitry.
  • FIG. 3 is a flowchart illustrating an exemplary method implemented in a communication system, such as, for example, the communication system of FIGS. 1 and 2, in accordance with one embodiment.
  • the communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIG. 2.
  • the host computer 24 provides user data (Block S100).
  • the host computer 24 provides the user data by executing a host application, such as, for example, the host application 50 (Block S102).
  • the host computer 24 initiates a transmission carrying the user data to the WD 22 (Block S104).
  • the network node 16 transmits to the WD 22 the user data which was carried in the transmission that the host computer 24 initiated, in accordance with the teachings of the embodiments described throughout this disclosure (Block S106).
  • the WD 22 executes a client application, such as, for example, the client application 92, associated with the host application 50 executed by the host computer 24 (Block s 108).
  • FIG. 4 is a flowchart illustrating an exemplary method implemented in a communication system, such as, for example, the communication system of FIG. 1, in accordance with one embodiment.
  • the communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIGS. 1 and 2.
  • the host computer 24 provides user data (Block Sl 10).
  • the host computer 24 provides the user data by executing a host application, such as, for example, the host application 50.
  • the host computer 24 initiates a transmission carrying the user data to the WD 22 (Block Sl 12).
  • the transmission may pass via the network node 16, in accordance with the teachings of the embodiments described throughout this disclosure.
  • the WD 22 receives the user data carried in the transmission (Block Sl 14).
  • FIG. 5 is a flowchart illustrating an exemplary method implemented in a communication system, such as, for example, the communication system of FIG. 1, in accordance with one embodiment.
  • the communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIGS. 1 and 2.
  • the WD 22 receives input data provided by the host computer 24 (Block Sl 16).
  • the WD 22 executes the client application 92, which provides the user data in reaction to the received input data provided by the host computer 24 (Block Sl 18).
  • the WD 22 provides user data (Block S120).
  • the WD provides the user data by executing a client application, such as, for example, client application 92 (Block S122).
  • client application 92 may further consider user input received from the user.
  • the WD 22 may initiate, in an optional third substep, transmission of the user data to the host computer 24 (Block S124).
  • the host computer 24 receives the user data transmitted from the WD 22, in accordance with the teachings of the embodiments described throughout this disclosure (Block S126).
  • FIG. 6 is a flowchart illustrating an exemplary method implemented in a communication system, such as, for example, the communication system of FIG. 1, in accordance with one embodiment.
  • the communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIGS. 1 and 2.
  • the network node 16 receives user data from the WD 22 (Block S128).
  • the network node 16 initiates transmission of the received user data to the host computer 24 (Block S130).
  • the host computer 24 receives the user data carried in the transmission initiated by the network node 16 (Block S132).
  • FIG. 7 is a flowchart of an exemplary process in a network node 16 according to some embodiments of the present disclosure.
  • One or more Blocks and/or functions performed by network node 16 may be performed by one or more elements of network node 16 such as by feedback unit 32 in processing circuitry 68, processor 70, communication interface 60, radio interface 62, etc.
  • the method is for a network node 16 that is configured for opportunities to transmit communication on a physical downlink shared channel, PDSCH, within a slot to the wireless device 22.
  • the method includes indicating (Block S134), such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, a sequence of Hybrid Automatic Repeat reQuest
  • the method includes transmitting (Block S136), such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, on the PDSCH in one of the opportunities within the slot.
  • the method includes determining (Block S138), such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, a HARQ-ACK opportunity in the indicated sequence of HARQ- ACK opportunities for the wireless device 22, based on the one of the opportunities for transmitting on the PDSCH in which the PDSCH is transmitted.
  • the method includes as a result of transmitting on the PDSCH, receiving (Block S140), such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities for the wireless device 22.
  • Block S140 such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities for the wireless device 22.
  • the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols.
  • the sequence of HARQ-ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier.
  • receiving the HARQ-ACK further includes receiving, such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, the HARQ-ACK in the physical uplink channel at the earliest HARQ- ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ- ACK opportunity being based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device 22.
  • indicating the sequence of HARQ-ACK opportunities within the slot further includes indicating, such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot.
  • the sequence of HARQ-ACK opportunities corresponds to the opportunities for transmitting on the PDSCH.
  • the method further includes indicating, such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, a subpattem of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities.
  • the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
  • the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities.
  • indicating the sequence of HARQ-ACK opportunities further includes indicating, such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, the sequence of HARQ- ACK opportunities in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
  • network node 16 such as via one or more of processing circuitry 68, processor 70, radio interface 62 and communication interface 60 is configured to optionally indicate a sequence of HARQ-ACK opportunities to the wireless device.
  • network node 16 such as via one or more of processing circuitry 68, processor 70, radio interface 62 and communication interface 60 is configured to receive a HARQ-ACK in a physical uplink channel according to the sequence of HARQ-ACK opportunities for the wireless device.
  • FIG. 8 is a flowchart of an exemplary process in a wireless device 22 according to some embodiments of the present disclosure.
  • One or more Blocks and/or functions performed by wireless device 22 may be performed by one or more elements of wireless device 22 such as by determination unit 34 in processing circuitry 84, processor 86, radio interface 82, etc.
  • a method is for a wireless device 22 that is configured for opportunities to receive communication on a physical downlink shared channel, PDSCH, within a slot. The method includes receiving (Block S142), such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, an indication of a sequence of Hybrid
  • the method includes receiving (Block S144), such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, on the PDSCH in one of the opportunities within the slot.
  • the method includes determining (Block S146), such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device 22, based on the one of the opportunities for receiving on the PDSCH in which the PDSCH is received.
  • the method includes transmitting (Block S148), such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in response to the receiving on the PDSCH.
  • the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols.
  • the sequence of HARQ-ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier.
  • determining the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities further includes determining the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities that is an earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being determined based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device 22.
  • receiving the indication of the sequence of HARQ-ACK opportunities within the slot further includes receiving, such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, an indication of a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot.
  • the sequence of HARQ-ACK opportunities corresponds to the opportunities for receiving on the PDSCH.
  • the method further includes receiving, such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, an indication of a subpattem of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities.
  • the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset. In some embodiments, the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities. In some embodiments, receiving the indication of the sequence of HARQ-ACK opportunities further includes receiving, such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, the indication in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
  • wireless device 22 such as via one or more of processing circuitry 84, processor 86 and radio interface 82 is configured to optionally receive an indication of a sequence of HARQ-ACK opportunities for the wireless device 22.
  • wireless device 22 such as via one or more of processing circuitry 84, processor 86 and radio interface 82 is configured to determine a sequence of HARQ-ACK opportunities for the wireless device 22.
  • wireless device 22 such as via one or more of processing circuitry 84, processor 86 and radio interface 82 is configured to transmit a HARQ- ACK in a physical uplink channel according to the sequence of HARQ-ACK opportunities.
  • the sequence of HARQ-ACK opportunities are derived from a set of HARQ-ACK opportunities and a periodicity of HARQ-ACK opportunities within the set.
  • the sequence of HARQ-ACK opportunities is based at least in part on non-periodic physical downlink channel transmissions, the sequence of HARQ-ACK opportunities being defined at least in part by a pattern of HARQ-ACK opportunities.
  • the pattern of HARQ-ACK opportunities includes a subpattern of HARQ-ACK opportunities that align with channel state information, CSI, transmission opportunities.
  • the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
  • sequences of HARQ-ACK opportunities are part of a plurality of preconfigured set of sequences of HARQ-ACK opportunities.
  • sequence refers to at least two such that a sequence of HARQ-ACK opportunities refers to at least two HARQ-ACK opportunities.
  • the sequence may be one or more of periodic, non-periodic, preconfigured, defined by a pattern, etc., as described herein with respect to the configuration of HARQ-ACK opportunities.
  • sequence of HARQ-ACK opportunities may be indicated and/or signal and/or communicated, in one or more embodiments, to the wireless device 22 such as via one or more fields, indicators, etc. and/or may be preconfigured such that the sequence applies during the absence of an indication, as described herein.
  • Embodiments provide for the communication of HARQ-ACK (an example of feedback) according to a sequence of HARQ-ACK opportunities, as described herein.
  • Section 1 Embodiment: HARQ-ACK opportunity periodicity
  • the PDSCH-Config information element (as described in 3GPP TS 38.331, Section 6.3.2) is extended (i.e., modifying, configured, etc.) with a reference to a PUCCH resource identity with a periodicity, as indicated in BOLD below, for example:
  • TimeDomainResourceAllocationList ⁇ OPTIONAL, — Need M
  • OF RateMatchPatternld OPTIONAL Need N rateMatchPatternGroupl RateMatchPatternGroup OPTIONAL, —
  • RateMatchPattemGroup2 RateMatchPatternGroup OPTIONAL —
  • sp-ZP-CSI-RS-ResourceSetsToAddModList SEQUENCE (SIZE (1. maxNrofZP- CSI-RS-ResourceSets)) OF ZP-CSI-RS-ResourceSet OPTIONAL, - Need N sp-ZP-CSI-RS-ResourceSetsToReleaseList SEQUENCE (SIZE (l . maxNrofZP- CSI-RS-ResourceSets)) OF ZP-CSI-RS-ResourceSetld OPTIONAL, - Need N p-ZP-CSI-RS-ResourceSet SetupRelease ⁇ ZP-CSI-RS-ResourceSet ⁇
  • the PUCCH resource list may include an entry indicating a
  • PUCCH resource in OFDM symbol 1 within a slot Let the PUCCH resource ID be X, then by, for example:
  • periodicalPucchResourceId-rell6 X
  • periodicalPucchResourcePeriodicity-rell6 “2 OFDM symbols”.
  • periodicalPucchResourceId-rell6 and/or periodicalPucchResourcePeriodicity-rell6 define a sequence of HARQ-ACK opportunities for the wireless device.
  • the wireless device 22 could be indicated“X” in, for example, the PUCCH resource indicator field in the DCI that would reference the locations ( 1, 3,..., 13 ⁇ as possible Orthogonal Frequency Division Multiplex (OFDM) symbols for HARQ- ACK transmissions. But due to the HARQ-ACK timing and wireless device 22 processing capabilities, there may only be one of these possible locations where the wireless device 22, at the earliest, can send a HARQ-ACK transmission. For example, if the PDSCH ended in symbol 4 of the slot (in other words, the last symbol of the PDSCH is symbol 4 of the slot) and the wireless device 22 could send HARQ-ACK not earlier, for example, than after 5 OFDM symbols after the symbol where PDSCH ended.
  • OFDM Orthogonal Frequency Division Multiplex
  • the earliest symbol where HARQ-ACK can be transmitted is symbol 10. Therefore, with a rule that the wireless device 22 uses the earliest possible PUCCH resource for HARQ-ACK transmission which is symbol 11 (since 11 belong to the indicated HARQ-ACK opportunity locations ( 1, 3,..., 13 ⁇ but not 10, in this example) there is no ambiguity in the network node 16 when HARQ- ACK is transmitted by wireless device 22.
  • periodical PUCCH resources are only referencing Type B transmissions such as if the transmission of Type A periodicity of PUCCH resource is not supported.
  • the periodic PUCCH resource configuration is defined by extending (i.e., modifying existing standards) PUCCH- Config IE in radio resource control (RRC) signalling. This is illustrated below as an example, where the modifications may be illustrated in BOLD.
  • RRC radio resource control
  • the periodicity P is in units of OFDM symbols, and indicates the multiple starting points of PUCCH resources within a slot.
  • the periodicity at least in part defines a sequence of HARQ-ACK opportunities. Denote startingSymbolIndex as S, and nrofSymbols as N s.
  • a total of 3 periodic PUCCH resources are defined in a slot, each of the 3 periodic PUCCH resources including demodulation reference signal (DM-RS) symbols, and uplink control information (UCI) symbols (e.g., HARQ-ACK may be transmitted in a UCI symbol).
  • a total of 3 periodic PUCCH resources are defined in a slot, each of the PUCCH resources including DM- RS symbols, and UCI symbol.
  • one or more of the shaded OFDM symbols correspond to a sequence of HARQ-ACK opportunities.
  • multiple PUCCH resources are indicated by a list of startingSymbollndex. For example,
  • Section 2 Embodiment: HARQ-ACK opportunity pattern
  • a pattern can be defined for showing or indicating (e.g., by the network node 16) to the wireless device 22 all possible PUCCH opportunities for transmitting HARQ-ACK.
  • the number of OFDM symbols in each PUCCH transmission is RRC-configured by parameter nrofSymbols as N s.
  • the PDSCH-Config information element (as described for example in 3GPP TS 38.331, Section 6.3.2) is extended (i.e., modified from the existing standard(s)) with a reference to a PUCCH resource pattern as indicated in BOLD, for example:
  • TimeDomainResourceAllocationList ⁇ OPTIONAL, — Need M
  • OF RateMatchPatternld OPTIONAL Need N rateMatchPatternGroupl RateMatchPatternGroup OPTIONAL, —
  • RateMatchPattemGroup2 RateMatchPatternGroup OPTIONAL —
  • sp-ZP-CSI-RS-ResourceSetsToAddModList SEQUENCE (SIZE (1. maxNrofZP- CSI-RS-ResourceSets)) OF ZP-CSI-RS-ResourceSet OPTIONAL, - Need N sp-ZP-CSI-RS-ResourceSetsToReleaseList SEQUENCE (SIZE (E.maxNrofZP- CSI-RS-ResourceSets)) OF ZP-CSI-RS-ResourceSetld OPTIONAL, - Need N p-ZP-CSI-RS-ResourceSet SetupRelease ⁇ ZP-CSI-RS-ResourceSet ⁇
  • pattern 1 is an index to a pattern that allows PUCCH
  • this earliest possible PUCCH resource would be symbol 11 when Pattern 1 is used since, e.g., symbol 11 is in the indicated sequence ofHARQ-ACK opportunities, symbols (2, 7 and 11 ⁇ in a slot.
  • Other patterns i.e., configuration of OFDM symbols to provide opportunities for HARQ-ACK transmission
  • an option can be elaborated related to simultaneous CSI and HARQ transmission.
  • the layer parameter simultaneousHARQ-ACK-CSI is enabled by network node 16
  • PUCCH format 2-4 may be utilized for UCI transmission by the wireless device 22 for simultaneous HARQ-ACK and CSI information.
  • a simultaneousHARQ-ACK-CSI recurrence pattern may be used as a subset of PUCCH resource pattern accordingly.
  • a first pattern defining or corresponding to a configuration of OFDM symbols to provide opportunities for HARQ-ACK transmission is provided where a sub-pattern or pattern within a pattern may also be provided where this subpattem or sequence defines or corresponds to a pattern for simultaneous HARQ-ACK and CSI transmission by the wireless device 22.
  • this example may be provided as follows, for example:
  • subpattem 1 is a subset of pattern pl (example in section 1) or pattern 1 (example in section 2), i.e., subpattem 1 £ pl or subpattem 1 £ pattern 1.
  • Section 3 HARQ-ACK processing time offset
  • the PUCCH resource indicator may not be present the DCI. Instead, the PUCCH resource may be semi- statically configured.
  • the section 1, above, can be applied where the actual starting symbol of HARQ-ACK depends on the periodicity and the starting symbol of the PUCCH resource obtained from the semi-statically configured PUCCH resource ID.
  • the PUCCH resource is fixed according to the configured value
  • PUCCH transmission opportunities can be limited.
  • the configured value can be restrictive when trying to allow fast HARQ-ACK transmission for a latency critical service, or may even be an invalid value with respect to the minimum wireless device 22 processing time.
  • HARQ-ACK timing can be based on the minimum wireless device 22 processing time for preparing HARQ-ACK (i.e., Ni+di ,i symbols as, for example, in Subclause 5.3 in 3GPP TS 38.214) plus an additional HARQ-ACK processing time offset, where the offset may be a modification to existing standards. That is, in some embodiments, HARQ-ACK is sent by the wireless device 22 at the earliest periodic opportunity after
  • the earliest periodic opportunity after Ni+du+offset symbols after the end of PDSCH may correspond to a pattern.
  • the sequence of HARQ-ACK opportunities is based on offset symbol(s).
  • the offset can be introduced as a parameter in PDSCH-Config information element or PUCCH-config IE, for example, similarly to how the periodicity parameter is introduced in the“PDSCH configuration based” section and“PUCCH
  • the offset value of 0 symbol or more can be configured.
  • the offset may provide flexibility to the network node 16 to further configure the PUCCH resource and to the wireless device 22 to allow for potentially less strict HARQ-ACK timing.
  • URLLC service may operate using a new DCI format which does not contain a PUCCH resource indicator field.
  • the PUCCH resource may be semi- statically configured while the HARQ-ACK timing may be fixed to the earliest possible PUCCH opportunity. Assuming that PUCCH resource periodicity is 2 symbols, the resulting possible HARQ-ACK opportunities are at symbol # ⁇ 0, 2, 4, 6, 8, 10, 12 ⁇ in a slot, i.e., one example of the sequence of HARQ-ACK opportunities. Also, in this example, it may be assumed that the minimum HARQ-ACK wireless device 22 processing time (Nl+dl,l) is 4 symbols, and HARQ-ACK processing time offset is 1 symbol.
  • the wireless device 22 is expected to send HARQ-ACK in symbol #9.
  • the periodic PUCCH resources symbols (0, 2, 4, 6, 8, 10, 12 ⁇
  • the earliest PUCCH resource opportunity at symbol#! 0 is used.
  • the actual HARQ- ACK timing overwrites the timing in the configured PUCCH resource.
  • the PUCCH resource indicator in the DCI is interpreted as a PUCCH resource set indicator.
  • the wireless device 22 may be configured with up to 8 PUCCH resource sets wherein the PUCCH resource indicator field in DCI may be interpreted according to Table 4 below.
  • a PUCCH resource indicator“X” in the PUCCH resource indicator field in the DCI can reference PUCCH resources with starting symbols 1, 3,.. and 13, respectively.
  • the wireless device 22 uses the PUCCH resource for HARQ-ACK transmission with starting symbol 11.
  • a network node configured to communicate with a wireless device (WD), the network node configured to, and/or comprising a radio interface and/or comprising processing circuitry configured to:
  • Embodiment A2 The network node of Embodiment Al, wherein the sequence of HARQ-ACK opportunities are derived at least in part from a set of HARQ-ACK opportunities and a periodicity of HARQ-ACK opportunities within the set.
  • Embodiment A3. The network node of Embodiment Al , wherein the sequence of HARQ-ACK opportunities is based at least in part on non-periodic physical downlink channel transmissions, the sequence of HARQ-ACK opportunities being defined at least in part by a pattern of HARQ-ACK opportunities.
  • Embodiment A4 The network node of Embodiment A3, wherein the pattern of HARQ-ACK opportunities includes a subpattem of HARQ-ACK opportunities that align with channel state information, CSI, transmission
  • Embodiment A5 The network node of Embodiment Al, wherein the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
  • Embodiment A6 The network node of Embodiment Al, wherein the sequence of HARQ-ACK opportunities are part of a plurality of preconfigured set of sequences of HARQ-ACK opportunities.
  • Embodiment B A method implemented in a network node, the method comprising;
  • Embodiment B2 The method of Embodiment Bl, wherein the sequence of HARQ-ACK opportunities are derived at least in part from a set of HARQ-ACK opportunities and a periodicity of HARQ-ACK opportunities within the set.
  • Embodiment B3 The method of Embodiment B 1 , wherein the sequence of HARQ-ACK opportunities is based at least in part on non-periodic physical downlink channel transmissions, the sequence of HARQ-ACK opportunities being defined by a pattern of HARQ-ACK opportunities.
  • Embodiment B4 The method of Embodiment B3, wherein the pattern of HARQ-ACK opportunities includes a subpattern of HARQ-ACK opportunities that align with channel state information, CSI, transmission opportunities.
  • Embodiment B5. The method of Embodiment Bl, wherein the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
  • Embodiment B6. The method of Embodiment Bl, wherein the sequence of HARQ-ACK opportunities are part of a plurality of preconfigured set of sequences of HARQ-ACK opportunities.
  • a wireless device configured to communicate with a network node, the WD configured to, and/or comprising a radio interface and/or processing circuitry configured to:
  • Embodiment C2 The WD of Embodiment Cl, wherein the sequence of HARQ-ACK opportunities are derived at least in part from a set of HARQ-ACK opportunities and a periodicity of HARQ-ACK opportunities within the set.
  • Embodiment C3 The WD of Embodiment Cl, wherein the sequence of HARQ-ACK opportunities is based at least in part on non-periodic physical downlink channel transmissions, the sequence of HARQ-ACK opportunities being defined at least in part by a pattern of HARQ-ACK opportunities.
  • Embodiment C4 The WD of Embodiment C3, wherein the pattern of HARQ-ACK opportunities includes a subpattern of HARQ-ACK opportunities that align with channel state information, CSI, transmission opportunities.
  • Embodiment C5. The WD of Embodiment Cl, wherein the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
  • Embodiment C6 The WD of Embodiment Cl, wherein the sequence of HARQ-ACK opportunities are part of a plurality of preconfigured set of sequences of HARQ-ACK opportunities.
  • Embodiment Dl A method implemented in a wireless device (WD), the method comprising:
  • Embodiment D2 The method of Embodiment Dl, wherein the sequence of HARQ-ACK opportunities are derived at least in part from a set of HARQ-ACK opportunities and a periodicity of HARQ-ACK opportunities within the set.
  • Embodiment D3 The method of Embodiment Dl, wherein the sequence of HARQ-ACK opportunities is based at least in part on non-periodic physical downlink channel transmissions, the sequence of HARQ-ACK opportunities being defined by a pattern of HARQ-ACK opportunities.
  • Embodiment D4 The method of Embodiment D3, wherein the pattern of HARQ-ACK opportunities includes a subpattern of HARQ-ACK opportunities that align with channel state information, CSI, transmission opportunities.
  • Embodiment D5 The method of Embodiment D 1 , wherein the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
  • Embodiment D6 The method of Embodiment Dl, wherein the sequence of HARQ-ACK opportunities are part of a plurality of preconfigured set of sequences of HARQ-ACK opportunities.
  • the concepts described herein may be embodied as a method, data processing system, computer program product and/or computer storage media storing an executable computer program. 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.” Any process, step, action and/or functionality described herein may be performed by, and/or associated to, a corresponding module, which may be implemented in software and/or firmware and/or hardware. 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++. However, 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. In the latter scenario, 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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Abstract

A method, system and apparatus are disclosed. In one or more embodiments, amethod for a wireless device that is configured for opportunities to receive communication on a physical downlink shared channel, PDSCH, within a slot includes receiving an indication of a sequence of Hybrid Automatic Repeat reQuest Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device; receiving on the PDSCH in one of the opportunities within the slot; determining a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device, based on the one of the opportunities for receiving on the PDSCH in which the PDSCH is received; and transmitting a HARQ- ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in response to the receiving on the PDSCH.

Description

CONFIGURATION OF HYBRID AUTOMATIC REPEAT REQUEST (HARQ)
OPPORTUNITIES
TECHNICAL FIELD
The present disclosure relates to wireless communications and, in particular, to configuration of Hybrid Automatic Repeat Request- Acknowledgment (HARQ-ACK) opportunities in the physical uplink channel.
BACKGROUND
Physical Uplink Control Channel (PUCCH) resource determination for
HARQ-ACK reporting:
Hybrid automatic repeat request (HARQ) is a method for error correction and control in communication systems. In Third Generation Partnership Project (“3GPP”) New Radio (NR)(also referred to as“5G”), when the wireless device (WD) (e.g., user equipment/UE) reports Hybrid automatic repeat request (HARQ)-Acknowledgment (ACK) on the PUCCH, the wireless device determines a PUCCH resource based on the number of HARQ-ACK information bits and the PUCCH resource indicator field in a last DCI format 1 0 or DCI format 1 1 that have a value of Physical Downlink Shared Channel (PDSCH)-to-HARQ feedback timing indicator indicating a same slot for the PUCCH transmission (as described for example in Third Generation
Partnership Project (3GPP) Technical Specification (TS) 38.213, Section 9.2.3):
For a PUCCH transmission with HARQ-ACK information, a wireless device determines a PUCCH resource after determining a set of PUCCH resources for ^UCI HARQ-ACK information bits, as described in 3GPP TS 38.213 Subclause 9.2.1. The PUCCH resource determination is based on a PUCCH resource indicator field as (as described in 3GPP TS 38.212) in a last DCI format 1 0 or DCI format 1 1, among the DCI formats 1 0 or DCI formats 1 1 that have a value of a PDSCH-to- HARQ feedback timing indicator field indicating a same slot for the PUCCH transmission, that the wireless device detects and for which the wireless device transmits corresponding HARQ-ACK information in the PUCCH where, for PUCCH resource determination, detected DCI formats are first indexed in an ascending order across serving cells indexes and are then indexed in an ascending order across Physical Downlink Control Channel (PDCCH) monitoring occasion indexes.
The PUCCH resource indicator field values map to values of a set of PUCCH resource indexes, as defined in Table 1, provided by higher layer parameter
ResourceList for PUCCH resources from a set of PUCCH resources provided by higher layer parameter PUCCH-Re source Set with a maximum of eight PUCCH resources.
For the first set of PUCCH resources and when the size
Figure imgf000004_0001
of higher layer parameter resourceList is larger than eight, when a wireless device provides HARQ- ACK information in a PUCCH transmission in response to detecting a last DCI format 1 0 or DCI format 1 1 in a PDCCH reception, among DCI formats 1 0 or DCI formats 1 1 with a value of the PDSCH-to-HARQ_feedback timing indicator field indicating a same slot for the PUCCH transmission, the wireless device determines a PUCCH resource with index rpucCH 0— rPUCCH— ^PUCCH 1 as
Figure imgf000004_0002
where is a number of Control Channel Elements (CCEs) in control resource set of the PDCCH reception for the DCI format 1 0 or DCI format 1 1 as described in
Subclause 10.1 of, for example, 3GPP TS 38.212,”CCE p is the index of a first CCE for the PDCCH reception, and ^PRI is a value of the PUCCH resource indicator field in the DCI format 1 0 or DCI format 1 1.
Table 1 : Mapping of PUCCH resource indication field values to a PUCCH resource in a PUCCH resource set with maximum 8 PUCCH resources
Figure imgf000004_0003
Figure imgf000005_0001
HARQ-ACK transmission timing:
In NR, the earliest time location where HARQ-ACK can be transmitted in the uplink after reception of an assignment on the PDCCH depends on the PDSCH processing time in the wireless device. In NR 3 GPP Release (Rel)-l5 there are two wireless device capabilities, Capability 1 and Capability 2, where Capability 2 has the faster processing (as described for example in 3GPP TS 38.214, Section 5.3):
If the first uplink symbol of the PUCCH which carries the HARQ-ACK information, as defined by the assigned HARQ-ACK timing Ki and the PUCCH resource to be used and including the effect of the timing advance, starts no earlier than at symbol Li, where Li is defined as the next uplink symbol with its CP starting after Tproc·1 = (^i +^iX2048+144)- ^ c after the end of the last symbol of the PDSCH carrying the Transport Block (TB) being acknowledged, then the wireless device may provide a valid HARQ-ACK message.
- Ni is based on m of table 2 and table 3 (below) for wireless device
processing capability 1 and 2 respectively, where m corresponds to the one of ( ipDCCH , m/Ί)8< //, m ΐ Ί.) resulting with the largest Tpr0c,i , where the mΐ'ΐci n corresponds to the subcarrier spacing of the PDCCH scheduling the PDSCH, the mrrXai corresponds to the subcarrier spacing of the scheduled PDSCH, and m UL corresponds to the subcarrier spacing of the uplink channel with which the HARQ-ACK is to be transmitted, and k is defined in subclause 4.41 of 3GPP TS 38.211.
- If the wireless device is configured with multiple active component
carriers, the first uplink symbol which carries the HARQ-ACK information further includes the effect of timing difference between the component carriers as described in 3GPP TS 38.133.
- For the PDSCH mapping type A as given in subclause 7.4.1.1 of 3GPP TS 38.211 : if the last symbol of PDSCH is on the i- th symbol of the slot where i < 7, then dpi = 7 - i, otherwise dpi = 0.
- For wireless device processing capability 1 : If the PDSCH is mapping type B as given in subclause 7.4.1.1 of 3GPP TS 38.211, and
o if the number of PDSCH symbols allocated is 7, then di,i = 0, o if the number of PDSCH symbols allocated is 4, then di,i = 3, o if the number of PDSCH symbols allocated is 2, then di,i = 3+d, where d is the number of overlapping symbols of the scheduling PDCCH and the scheduled PDSCH.
- For wireless device processing capability 2: If the PDSCH is mapping type B as given in subclause 7.4.1.1 of 3GPP TS 38.211,
o if the number of PDSCH symbols allocated is 7, then dpi = 0, o if the number of PDSCH symbols allocated is 4, then dpi is the number of overlapping symbols of the scheduling PDCCH and the scheduled PDSCH,
o if the number of PDSCH symbols allocated is 2, ■ if the scheduling PDCCH was in a 3 -symbol CORESET and the CORESET and the PDSCH had the same starting symbol, then di = 3,
■ otherwise di is the number of overlapping symbols of the scheduling PDCCH and the scheduled PDSCH.
- For wireless device processing capability 2 with a scheduling limitation when m = 1, if the scheduled resource block (RB) allocation exceeds 136 RBs, the wireless device defaults to capability 1 processing time. The wireless device may skip decoding a number of PDSCHs with last symbol within 10 symbols before the start of a PDSCH that is scheduled to follow
Capability 2, if any of those PDSCHs are scheduled with more than 136 RBs with 30kHz SCS and following Capability 1 processing time.
- If this PETCCH resource is overlapping with another PETCCH or PETSCH resource, then HARQ-ACK is multiplexed following the procedure in subclause 9.2.5 of 3GPP TS 38.213, otherwise the HARQ-ACK message is transmitted on PUCCH.
Otherwise the wireless device may not provide a valid HARQ-ACK corresponding to the scheduled PDSCH. The value of Tproc,l is used both in the case of normal and extended cyclic prefix.
TABLE 2: PDSCH processing time for PDSCH processing capability 1
Figure imgf000007_0002
TABLE 3: PDSCH processing time for PDSCH processing capability 2
Figure imgf000007_0001
Figure imgf000008_0001
SUMMARY
Some embodiments advantageously provide methods, systems, network nodes and wireless devices for configuration of HARQ-ACK opportunities in the physical uplink channel. In some embodiments, the configuration defines a periodicity of the HARQ-ACK opportunities.
According to one aspect of the present disclosure, a method for a wireless device that is configured for opportunities to receive communication on a physical downlink shared channel, PDSCH, within a slot is provided. The method includes receiving an indication of a sequence of Hybrid Automatic Repeat reQuest
Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device. The method includes receiving on the PDSCH in one of the opportunities within the slot. The method includes determining a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device, based on the one of the opportunities for receiving on the PDSCH in which the PDSCH is received. The method includes transmitting a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in response to the receiving on the PDSCH.
In some embodiments of this aspect, the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols. In some embodiments, the sequence of HARQ-ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier. In some embodiments of this aspect, determining the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities further includes determining the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities that is an earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being determined based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device. In some embodiments of this aspect, receiving the indication of the sequence of HARQ-ACK opportunities within the slot further includes receiving an indication of a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot. In some embodiments of this aspect, the sequence of HARQ-ACK opportunities corresponds to the opportunities for receiving on the PDSCH.
In some embodiments of this aspect, the method further includes receiving an indication of a subpattem of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities. In some embodiments of this aspect, the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset. In some embodiments of this aspect, the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities. In some embodiments of this aspect, receiving the indication of the sequence of HARQ-ACK opportunities further includes receiving the indication in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
According to another aspect of the present disclosure, a wireless device that is configured for opportunities to receive communication on a physical downlink shared channel, PDSCH, within a slot is provided. The wireless device includes processing circuitry. The processing circuitry is configured to cause the wireless device to receive an indication of a sequence of Hybrid Automatic Repeat reQuest
Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device. The processing circuitry is configured to cause the wireless device to receive on the PDSCH in one of the opportunities within the slot. The processing circuitry is configured to cause the wireless device to determine a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device, based on the one of the opportunities for receiving on the PDSCH in which the PDSCH is received. The processing circuitry is configured to cause the wireless device to transmit a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in response to the receiving on the PDSCH. In some embodiments of this aspect, the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols. In some embodiments, the sequence of HARQ-ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier. In some embodiments of this aspect, the processing circuitry is further configured to cause the wireless device to determine the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities by being configured to cause the wireless device to determine the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities that is an earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being determined based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device. In some embodiments of this aspect, the processing circuitry is further configured to cause the wireless device to receive the indication of the sequence of HARQ-ACK opportunities within the slot by being configured to cause the wireless device to receive an indication of a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot. In some embodiments of this aspect, the sequence of HARQ-ACK opportunities corresponds to the opportunities for receiving on the PDSCH.
In some embodiments of this aspect, the processing circuitry is further configured to cause the wireless device to receive an indication of a subpattern of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities. In some embodiments of this aspect, the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset. In some embodiments of this aspect, the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities. In some embodiments of this aspect, the processing circuitry is further configured to cause the wireless device to receive the indication of the sequence of HARQ-ACK
opportunities by being configured to cause the wireless device to receive the indication in at least one of a physical downlink shared channel, PDSCH,
configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message. According to yet another aspect of the present disclosure, a method for a network node that is configured for opportunities to transmit communication on a physical downlink shared channel, PDSCH, within a slot to the wireless device is provided. The method includes indicating a sequence of Hybrid Automatic Repeat reQuest Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device. The method includes transmitting on the PDSCH in one of the opportunities within the slot. The method includes determining a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device, based on the one of the opportunities for transmitting on the PDSCH in which the PDSCH is transmitted. The method includes, as a result of transmitting on the PDSCH, receiving a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities for the wireless device.
In some embodiments of this aspect, the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols. In some embodiments, the sequence of HARQ-ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier. In some embodiments of this aspect, receiving the HARQ-ACK further includes receiving the HARQ-ACK in the physical uplink channel at the earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device. In some embodiments of this aspect, indicating the sequence of HARQ-ACK opportunities within the slot further includes indicating a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot. In some embodiments of this aspect, the sequence of HARQ-ACK opportunities corresponds to the opportunities for transmitting on the PDSCH.
In some embodiments of this aspect, the method further includes indicating a subpattern of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities. In some embodiments of this aspect, the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset. In some embodiments of this aspect, the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities. In some embodiments of this aspect, indicating the sequence of HARQ-ACK
opportunities further includes indicating the sequence of HARQ-ACK opportunities in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
According to another aspect of the present disclosure, a network node that is configured for opportunities to transmit communication on a physical downlink shared channel, PDSCH, within a slot to the wireless device is provided. The network node comprises processing circuitry. The processing circuitry is configured to cause the network node to indicate a sequence of Hybrid Automatic Repeat reQuest
Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device. The processing circuitry is configured to cause the network node to transmit on the PDSCH in one of the opportunities within the slot. The processing circuitry is configured to cause the network node to determine a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device, based on the one of the opportunities for transmitting on the PDSCH in which the PDSCH is transmitted. The processing circuitry is configured to cause the network node to, as a result of the transmission on the PDSCH, receive a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities for the wireless device.
In some embodiments of this aspect, the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols. In some embodiments, the sequence of HARQ-ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier. In some embodiments of this aspect, the processing circuitry is further configured to cause the network node to receive the HARQ-ACK by being configured to cause the network node to receive the HARQ-ACK in the physical uplink channel at the earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device. In some embodiments of this aspect, the processing circuitry is further configured to cause the network node to indicate the sequence of HARQ-ACK opportunities within the slot by being configured to cause the network node to indicate a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot. In some embodiments of this aspect, the sequence of HARQ-ACK opportunities corresponds to the opportunities for transmitting on the PDSCH.
In some embodiments of this aspect, the processing circuitry is further configured to cause the network node to indicate a subpattem of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities. In some embodiments of this aspect, the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset. In some embodiments of this aspect, the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities. In some embodiments of this aspect, the processing circuitry is further configured to cause the network node to indicate the sequence of HARQ-ACK opportunities by being configured to cause the network node to indicate the sequence of HARQ-ACK opportunities in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
BRIEF DESCRIPTION OF THE DRAWINGS
A more complete understanding of the present embodiments, and the attendant advantages and features thereof, will be more readily understood by reference to the following detailed description when considered in conjunction with the accompanying drawings wherein:
FIG. 1 is a schematic diagram of an exemplary network architecture illustrating a communication system connected via an intermediate network to a host computer according to the principles in the present disclosure;
FIG. 2 is a block diagram of a host computer communicating via a network node with a wireless device over an at least partially wireless connection according to some embodiments of the present disclosure; FIG. 3 is a flowchart illustrating exemplary methods implemented in a communication system including a host computer, a network node and a wireless device for executing a client application at a wireless device according to some embodiments of the present disclosure;
FIG. 4 is a flowchart illustrating exemplary methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data at a wireless device according to some embodiments of the present disclosure;
FIG. 5 is a flowchart illustrating exemplary methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data from the wireless device at a host computer according to some embodiments of the present disclosure;
FIG. 6 is a flowchart illustrating exemplary methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data at a host computer according to some embodiments of the present disclosure;
FIG. 7 is a flowchart of an exemplary process in a network node according to some embodiments of the present disclosure;
FIG. 8 is a flowchart of an exemplary process in a wireless device according to some embodiments of the present disclosure;
FIG. 9 is diagram of a short PUCCH with five PUCCH resources defined in a slot according to some embodiments of the present disclosure;
FIG. 10 is a diagram of short PUCCH where four PUCCH resources are defined in a slot according to some embodiments of the present disclosure;
FIG. 11 is a diagram of short PUCCH where four PUCCH resources are defined in a slot with inter-slot frequency hopping according to some embodiments of the present disclosure;
FIG. 12 is a diagram of long PUCCH where three PUCCH resources are defined in the slot according to some embodiments of the present disclosure;
FIG. 13 is a diagram of a short PUCCH where PUCCH resources are defined according to some embodiments of the present disclosure; and FIG. 14 is a diagram of short PUCCH that occupies 1 OFDM symbol where PUCCH resources are defined according to some embodiments of the present disclosure.
DETAILED DESCRIPTION
For ETltra-reliable low latency communication (EIRLLC) with high latency requirements, there may be several transmission opportunities within a slot for PDSCH transmission and hence also a usefulness for having several opportunities for HARQ-ACK reporting on PETCCH within a slot. This means that the wireless device may be configured with several PETCCH resources that enable the possibility for multiple opportunities of HARQ-ACK transmissions within a slot although only one of the HARQ-ACK transmission opportunities may be used in each slot. For example, a wireless device running EIRLLC service may be configured with the possibility of receiving PDCCH in every second Orthogonal Frequency Division Multiplex
(OFDM)symbol, e.g., symbols 0, 2, 4, ..., 12 and PUCCH resources for HARQ-ACK transmission also in every second symbol, e.g., symbols 1, 3, ...., 13. This means that the wireless device may be configured with a list of 7 PUCCH resources just for possible HARQ-ACK reporting for URLLC. Since there may be a need to have other PUCCH resources for other needs, the list of at most 8 PUCCH resources, for example, that can be explicitly indicated by PUCCH resource indicator in the downlink control information (DCI) may likely be exceeded. If there are more than 8 PUCCH resources in the list, the index of first CCE may control which PUCCH resource is indicated. This means that the locations where the DCI can be transmitted may be limited in order to be able to reference an intended PUCCH resource. As a consequence, this limitation in the locations of DCI may impose scheduling restrictions on where the DCI can be transmitted and may potentially cause “blocking” if the DCI cannot be sent on a desired CCE (due to that it is already used for some other UE).
Some embodiments of the instant disclosure may advantageously help solve at least a portion of the problem described above by providing periodicity in HARQ- ACK opportunities such as, in one or more embodiments, configuring a sequence of HARQ-ACK opportunities. In one or more embodiments, as used herein“HARQ- ACK opportunity”, and more generally feedback opportunities, may refer to one or more resources/time resources (e.g., OFDM symbols) that may be available for the wireless device 22 to transmit HARQ-ACK (an example of feedback).
Before describing in detail exemplary embodiments, it is noted that the embodiments reside primarily in combinations of apparatus components and processing steps related to configuration of HARQ-ACK opportunities in the physical uplink channel. Accordingly, components have been represented where appropriate by conventional symbols in the drawings, showing only those specific details that are pertinent to understanding the embodiments so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein. Like numbers refer to like elements throughout the description.
As used herein, relational terms, such as“first” and“second,”“top” and “bottom,” and the like, may be used solely to distinguish one entity or element from another entity or element without necessarily requiring or implying any physical or logical relationship or order between such entities or elements. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the concepts described herein. As used herein, the singular forms“a”,“an” and“the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises,”“comprising,”“includes” and/or“including” when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
In embodiments described herein, 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. One having ordinary skill in the art will appreciate that multiple components may interoperate and modifications and variations are possible of achieving the electrical and data communication. In some embodiments described herein, the term“coupled,”“connected,” and the like, may be used herein to indicate a connection, although not necessarily directly, and may include wired and/or wireless connections.
The term“network node” 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), g Node B (gNB), evolved Node B (eNB or eNodeB), Node B, multi-standard radio (MSR) radio node such as MSR BS, multi-cell/multicast coordination entity (MCE), relay node, donor node controlling relay, radio access point (AP), transmission points, transmission nodes, Remote Radio Unit (RRU) Remote Radio Head (RRH), a core network node (e.g., mobile management entity (MME), self-organizing network (SON) node, a coordinating node, positioning node, MDT node, etc.), an external node (e.g., 3rd party node, a node external to the current network), nodes in distributed antenna system (DAS), a spectrum access system (SAS) node, an element management system (EMS), etc. The network node may also comprise test equipment. The term“radio node” used herein may be used to also denote a wireless device (WD) such as a wireless device (WD) or a radio network node.
In some embodiments, the non-limiting terms wireless device (WD) or a user equipment (UE) are used interchangeably. The WD herein can be any type of wireless device capable of communicating with a network node or another WD over radio signals, such as wireless device (WD). The WD may also be a radio communication device, target device, device to device (D2D) WD, machine type WD or WD capable of machine to machine communication (M2M), low-cost and/or low-complexity WD, a sensor equipped with WD, Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles, Customer
Premises Equipment (CPE), an Internet of Things (IoT) device, or a Narrowband IoT (NB-IOT) device etc.
Also, in some embodiments the generic term“radio network node” is used. It can be any kind of a radio network node which may comprise any of base station, radio base station, base transceiver station, base station controller, network controller, RNC, evolved Node B (eNB), Node B, gNB, Multi-cell/multicast Coordination Entity (MCE), relay node, access point, radio access point, Remote Radio Unit (RRU) Remote Radio Head (RRH).
The term resource used herein may correspond to any type of physical resource or radio resource expressed in terms of length of time and/or frequency. Signals are transmitted or received by a radio node over a time resource. Examples of time resources are: symbol, time slot, subframe, radio frame, Transmission Time Interval (TTI), interleaving time, etc.
The term time resource used herein may correspond to any type of physical resource or radio resource expressed in terms of length of time. Examples of time resources are: symbol, time slot, subframe, radio frame, TTI, interleaving time, etc. In some embodiments, the term“resource” is intended to indicate either a frequency resource, and/or a time resource.
A resource element may represent a smallest time-frequency resource, e.g. representing the time and frequency range covered by one symbol or a number of bits represented in a common modulation. A resource element may e.g. cover a symbol time length and a subcarrier, in particular in 3GPP, NR and/or LTE standards. A data transmission may represent and/or pertain to transmission of specific data, e.g. a specific block of data and/or transport block.
An indication generally may explicitly and/or implicitly indicate the information it represents and/or indicates. Implicit indication may for example be based on position and/or resource used for transmission. Explicit indication may for example be based on a parametrization with one or more parameters, and/or one or more index or indices, and/or one or more bit patterns representing the information. It may in particular be considered that control signaling as described herein, based on the utilized resource sequence, implicitly indicates the control signaling type.
Configuring a terminal or wireless device or node may involve instructing and/or causing the wireless device or node to change its configuration, e.g., at least one setting and/or register entry and/or operational mode. A terminal or wireless device or node may be adapted to configure itself, e.g., according to information or data in a memory of the terminal or wireless device. Configuring a node or terminal or wireless device by another device or node or a network may refer to and/or comprise transmitting information and/or data and/or instructions to the wireless device or node by the other device or node or the network, e.g., allocation data (which may also be and/or comprise configuration data) and/or scheduling data and/or scheduling grants. Configuring a terminal may include sending allocation/configuration data to the terminal indicating which modulation and/or encoding to use. A terminal may be configured with and/or for scheduling data and/or to use, e.g., for transmission, scheduled and/or allocated uplink resources, and/or, e.g., for reception, scheduled and/or allocated downlink resources. Uplink resources and/or downlink resources may be scheduled and/or provided with allocation or configuration data.
Generally, configuring may include determining configuration data representing the configuration and providing, e.g. transmitting, it to one or more other nodes (parallel and/or sequentially), which may transmit it further to the radio node (or another node, which may be repeated until it reaches the wireless device).
Alternatively, or additionally, configuring a radio node, e.g., by a network node or other device, may include receiving configuration data and/or data pertaining to configuration data, e.g., from another node like a network node, which may be a higher-level node of the network, and/or transmitting received configuration data to the radio node. Accordingly, determining a configuration and transmitting the configuration data to the radio node may be performed by different network nodes or entities, which may be able to communicate via a suitable interface, e.g., an X2 interface in the case of LTE or a corresponding interface for NR. Configuring a terminal (e.g. WD) may comprise scheduling downlink and/or uplink transmissions for the terminal, e.g. downlink data and/or downlink control signaling and/or DCI and/or uplink control or data or communication signaling, in particular
acknowledgement signaling, and/or configuring resources and/or a resource pool therefor. In particular, configuring a terminal (e.g. WD) may comprise configuring the WD to perform certain measurements on certain subframes or radio resources and reporting such measurements according to embodiments of the present disclosure.
Even though the descriptions herein may be explained in the context of one of a Downlink (DL) and an Uplink (UL) communication, it should be understood that the basic principles disclosed may also be applicable to the other of the one of the DL and the UL communication. In some embodiments in this disclosure, the principles may be considered applicable to a transmitter and a receiver. For DL communication, the network node is the transmitter and the receiver is the WD. For the UL
communication, the transmitter is the WD and the receiver is the network node.
Note that although terminology from one particular wireless system, such as, for example, 3GPP LTE and/or New Radio (NR), may be used in this disclosure, this should not be seen as limiting the scope of the disclosure to only the aforementioned system. Other wireless systems, including without limitation Wide Band Code Division Multiple Access (WCDMA), Worldwide Interoperability for Microwave Access (WiMax), Ultra Mobile Broadband (UMB) and Global System for Mobile Communications (GSM), may also benefit from exploiting the ideas covered within this disclosure.
Note further, that functions described herein as being performed by a wireless device or a network node may be distributed over a plurality of wireless devices and/or network nodes. In other words, it is contemplated that the functions of the network node and wireless device described herein are not limited to performance by a single physical device and, in fact, can be distributed among several physical devices.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Embodiments provide configurations of HARQ-ACK opportunities in the physical uplink channel.
Referring now to the drawing figures, in which like elements are referred to by like reference numerals, there is shown in FIG. 1 a schematic diagram of a
communication system 10, according to an embodiment, such as a 3 GPP -type cellular network that may support standards such as LTE and/or NR (5G), which comprises an access network 12, such as a radio access network, and a core network 14. The access network 12 comprises a plurality of network nodes l6a, l6b, l6c (referred to collectively as network nodes 16), such as NBs, eNBs, gNBs or other types of wireless access points, each defining a corresponding coverage area l8a, 18b, l8c (referred to collectively as coverage areas 18). Each network node l6a, l6b, l6c is connectable to the core network 14 over a wired or wireless connection 20. A first wireless device (WD) 22a located in coverage area l8a is configured to wirelessly connect to, or be paged by, the corresponding network node l6a. A second WD 22b in coverage area 18b is wirelessly connectable to the corresponding network node l6b. While a plurality of WDs 22a, 22b (collectively referred to as wireless devices 22) are illustrated in this example, the disclosed embodiments are equally applicable to a situation where a sole WD is in the coverage area or where a sole WD is connecting to the corresponding network node 16. Note that although only two WDs 22 and three network nodes 16 are shown for convenience, the communication system may include many more WDs 22 and network nodes 16.
Also, it is contemplated that a WD 22 can be in simultaneous communication and/or configured to separately communicate with more than one network node 16 and more than one type of network node 16. For example, a WD 22 can have dual connectivity with a network node 16 that supports LTE and the same or a different network node 16 that supports NR. As an example, WD 22 can be in communication with an eNB for LTE/E-UTRAN and a gNB for NR/NG-RAN.
The communication system 10 may itself be connected to a host computer 24, which may be embodied in the hardware and/or software of a standalone server, a cloud-implemented server, a distributed server or as processing resources in a server farm. The host computer 24 may be under the ownership or control of a service provider, or may be operated by the service provider or on behalf of the service provider. The connections 26, 28 between the communication system 10 and the host computer 24 may extend directly from the core network 14 to the host computer 24 or may extend via an optional intermediate network 30. The intermediate network 30 may be one of, or a combination of more than one of, a public, private or hosted network. The intermediate network 30, if any, may be a backbone network or the Internet. In some embodiments, the intermediate network 30 may comprise two or more sub-networks (not shown).
The communication system of FIG. 1 as a whole enables connectivity between one of the connected WDs 22a, 22b and the host computer 24. The connectivity may be described as an over-the-top (OTT) connection. The host computer 24 and the connected WDs 22a, 22b are configured to communicate data and/or signaling via the OTT connection, using the access network 12, the core network 14, any intermediate network 30 and possible further infrastructure (not shown) as intermediaries. The OTT connection may be transparent in the sense that at least some of the participating communication devices through which the OTT connection passes are unaware of routing of uplink and downlink communications. For example, a network node 16 may not or need not be informed about the past routing of an incoming downlink communication with data originating from a host computer 24 to be forwarded (e.g., handed over) to a connected WD 22a. Similarly, the network node 16 need not be aware of the future routing of an outgoing uplink communication originating from the WD 22a towards the host computer 24.
A network node 16 is configured to include a feedback unit 32 which is configured to one or more of: indicate a sequence of Hybrid Automatic Repeat reQuest Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device 22; transmit on the PDSCH in one of the opportunities within the slot; determine a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device 22, based on the one of the opportunities for transmitting on the PDSCH in which the PDSCH is transmitted; and as a result of the transmission on the PDSCH, receive a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in the sequence of HARQ- ACK opportunities for the wireless device 22. In some embodiments, the feedback unit 32 is configured to receive HARQ-ACK (an example of feedback) according to a sequence of HARQ-ACK opportunities.
A wireless device 22 is configured to include a determination unit 34 which is configured to one or more of: receive an indication of a sequence of Hybrid
Automatic Repeat reQuest Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device; receive on the PDSCH in one of the opportunities within the slot; determine a HARQ-ACK opportunity in the indicated sequence of HARQ- ACK opportunities for the wireless device, based on the one of the opportunities for receiving on the PDSCH in which the PDSCH is received; and transmit a HARQ- ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in response to the receiving on the PDSCH. In some embodiments, the determination unit 34 is configured to transmit HARQ-ACK (an example of feedback) according to a sequence of HARQ-ACK opportunities.
Example implementations, in accordance with an embodiment, of the WD 22, network node 16 and host computer 24 discussed in the preceding paragraphs will now be described with reference to FIG. 2. In a communication system 10, a host computer 24 comprises hardware (HW) 38 including a communication interface 40 configured to set up and maintain a wired or wireless connection with an interface of a different communication device of the communication system 10. The host computer 24 further comprises processing circuitry 42, which may have storage and/or processing capabilities. The processing circuitry 42 may include a processor 44 and memory 46. In particular, in addition to or instead of a processor, such as a central processing unit, and memory, the processing circuitry 42 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) adapted to execute instructions. The processor 44 may be configured to access (e.g., write to and/or read from) memory 46, 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).
Processing circuitry 42 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by host computer 24. Processor 44 corresponds to one or more processors 44 for performing host computer 24 functions described herein. The host computer 24 includes memory 46 that is configured to store data, programmatic software code and/or other information described herein. In some embodiments, the software 48 and/or the host application 50 may include instructions that, when executed by the processor 44 and/or processing circuitry 42, causes the processor 44 and/or processing circuitry 42 to perform the processes described herein with respect to host computer 24. The instructions may be software associated with the host computer 24. The software 48 may be executable by the processing circuitry 42. The software 48 includes a host application 50. The host application 50 may be operable to provide a service to a remote user, such as a WD 22 connecting via an OTT connection 52 terminating at the WD 22 and the host computer 24. In providing the service to the remote user, the host application 50 may provide user data which is transmitted using the OTT connection 52. The“user data” may be data and information described herein as implementing the described functionality. In one embodiment, the host computer 24 may be configured for providing control and functionality to a service provider and may be operated by the service provider or on behalf of the service provider. The processing circuitry 42 of the host computer 24 may enable the host computer 24 to observe, monitor, control, transmit to and/or receive from the network node 16 and or the wireless device 22. The processing circuitry 42 of the host computer 24 may include an information unit 54 configured to enable the service provider to one or more of provide, transmit, receive, determine information related to a sequence of HARQ-ACK opportunities.
The communication system 10 further includes a network node 16 provided in a communication system 10 and including hardware 58 enabling it to communicate with the host computer 24 and with the WD 22. The hardware 58 may include a communication interface 60 for setting up and maintaining a wired or wireless connection with an interface of a different communication device of the
communication system 10, as well as a radio interface 62 for setting up and maintaining at least a wireless connection 64 with a WD 22 located in a coverage area 18 served by the network node 16. The radio interface 62 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and/or one or more RF transceivers. The communication interface 60 may be configured to facilitate a connection 66 to the host computer 24. The connection 66 may be direct or it may pass through a core network 14 of the communication system 10 and/or through one or more intermediate networks 30 outside the communication system 10.
In the embodiment shown, the hardware 58 of the network node 16 further includes processing circuitry 68. The processing circuitry 68 may include a processor 70 and a memory 72. In particular, in addition to or instead of a processor, such as a central processing unit, and memory, the processing circuitry 68 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) adapted to execute instructions. The processor 70 may be configured to access (e.g., write to and/or read from) the memory 72, 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).
Thus, the network node 16 further has software 74 stored internally in, for example, memory 72, or stored in external memory (e.g., database, storage array, network storage device, etc.) accessible by the network node 16 via an external connection. The software 74 may be executable by the processing circuitry 68. The processing circuitry 68 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by network node 16. Processor 70 corresponds to one or more processors 70 for performing network node 16 functions described herein. The memory 72 is configured to store data, programmatic software code and/or other information described herein. In some embodiments, the software 74 may include instructions that, when executed by the processor 70 and/or processing circuitry 68, causes the processor 70 and/or processing circuitry 68 to perform the processes described herein with respect to network node 16. For example, processing circuitry 68 of the network node 16 may include feedback unit 32 configured to receive HARQ-ACK (an example of feedback) according to a sequence of HARQ-ACK opportunities.
The communication system 10 further includes the WD 22 already referred to. The WD 22 may have hardware 80 that may include a radio interface 82 configured to set up and maintain a wireless connection 64 with a network node 16 serving a coverage area 18 in which the WD 22 is currently located. The radio interface 82 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and/or one or more RF transceivers.
The hardware 80 of the WD 22 further includes processing circuitry 84. The processing circuitry 84 may include a processor 86 and memory 88. In particular, in addition to or instead of a processor, such as a central processing unit, and memory, the processing circuitry 84 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) adapted to execute instructions. The processor 86 may be configured to access (e.g., write to and/or read from) memory 88, 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).
Thus, the WD 22 may further comprise software 90, which is stored in, for example, memory 88 at the WD 22, or stored in external memory (e.g., database, storage array, network storage device, etc.) accessible by the WD 22. The software 90 may be executable by the processing circuitry 84. The software 90 may include a client application 92. The client application 92 may be operable to provide a service to a human or non-human user via the WD 22, with the support of the host computer 24. In the host computer 24, an executing host application 50 may communicate with the executing client application 92 via the OTT connection 52 terminating at the WD 22 and the host computer 24. In providing the service to the user, the client application 92 may receive request data from the host application 50 and provide user data in response to the request data. The OTT connection 52 may transfer both the request data and the user data. The client application 92 may interact with the user to generate the user data that it provides.
The processing circuitry 84 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by WD 22. The processor 86 corresponds to one or more processors 86 for performing WD 22 functions described herein. The WD 22 includes memory 88 that is configured to store data, programmatic software code and/or other information described herein. In some embodiments, the software 90 and/or the client application 92 may include instructions that, when executed by the processor 86 and/or processing circuitry 84, causes the processor 86 and/or processing circuitry 84 to perform the processes described herein with respect to WD 22. For example, the processing circuitry 84 of the wireless device 22 may include a determination unit 34 configured to transmit HARQ-ACK (an example of feedback) according to a sequence of HARQ-ACK opportunities.
In some embodiments, the inner workings of the network node 16, WD 22, and host computer 24 may be as shown in FIG. 2 and independently, the surrounding network topology may be that of FIG. 1.
In FIG. 2, the OTT connection 52 has been drawn abstractly to illustrate the communication between the host computer 24 and the wireless device 22 via the network node 16, without explicit reference to any intermediary devices and the precise routing of messages via these devices. Network infrastructure may determine the routing, which it may be configured to hide from the WD 22 or from the service provider operating the host computer 24, or both. While the OTT connection 52 is active, the network infrastructure may further take decisions by which it dynamically changes the routing (e.g., on the basis of load balancing consideration or
reconfiguration of the network).
The wireless connection 64 between the WD 22 and the network node 16 is in accordance with the teachings of the embodiments described throughout this disclosure. One or more of the various embodiments improve the performance of OTT services provided to the WD 22 using the OTT connection 52, in which the wireless connection 64 may form the last segment. More precisely, the teachings of some of these embodiments may improve the data rate, latency, and/or power consumption and thereby provide benefits such as reduced user waiting time, relaxed restriction on file size, better responsiveness, extended battery lifetime, etc.
In some embodiments, a measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve. There may further be an optional network functionality for reconfiguring the OTT connection 52 between the host computer 24 and WD 22, in response to variations in the measurement results. The measurement procedure and/or the network functionality for reconfiguring the OTT connection 52 may be implemented in the software 48 of the host computer 24 or in the software 90 of the WD 22, or both. In embodiments, sensors (not shown) may be deployed in or in association with communication devices through which the OTT connection 52 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which software 48, 90 may compute or estimate the monitored quantities. The reconfiguring of the OTT connection 52 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not affect the network node 16, and it may be unknown or imperceptible to the network node 16. Some such procedures and functionalities may be known and practiced in the art. In certain embodiments, measurements may involve proprietary WD signaling facilitating the host computer’s 24 measurements of throughput, propagation times, latency and the like. In some embodiments, the measurements may be implemented in that the software 48, 90 causes messages to be transmitted, in particular empty or ‘dummy’ messages, using the OTT connection 52 while it monitors propagation times, errors etc.
Thus, in some embodiments, the host computer 24 includes processing circuitry 42 configured to provide user data and a communication interface 40 that is configured to forward the user data to a cellular network for transmission to the WD 22. In some embodiments, the cellular network also includes the network node 16 with a radio interface 62. In some embodiments, the network node 16 is configured to, and/or the network node’s 16 processing circuitry 68 is configured to perform the functions and/or methods described herein for
preparing/initiating/maintaining/supporting/ending a transmission to the WD 22, and/or preparing/terminating/maintaining/supporting/ending in receipt of a transmission from the WD 22.
In some embodiments, the host computer 24 includes processing circuitry 42 and a communication interface 40 that is configured to a communication interface 40 configured to receive user data originating from a transmission from a WD 22 to a network node 16. In some embodiments, the WD 22 is configured to, and/or comprises a radio interface 82 and/or processing circuitry 84 configured to perform the functions and/or methods described herein for
preparing/initiating/maintaining/supporting/ending a transmission to the network node 16, and/or preparing/terminating/maintaining/supporting/ending in receipt of a transmission from the network node 16. Although FIGS. 1 and 2 show various“units” such as feedback unit 32, and determination unit 34 as being within a respective processor, it is contemplated that these units may be implemented such that a portion of the unit is stored in a corresponding memory within the processing circuitry. In other words, the units may be implemented in hardware or in a combination of hardware and software within the processing circuitry.
FIG. 3 is a flowchart illustrating an exemplary method implemented in a communication system, such as, for example, the communication system of FIGS. 1 and 2, in accordance with one embodiment. The communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIG. 2. In a first step of the method, the host computer 24 provides user data (Block S100). In an optional substep of the first step, the host computer 24 provides the user data by executing a host application, such as, for example, the host application 50 (Block S102). In a second step, the host computer 24 initiates a transmission carrying the user data to the WD 22 (Block S104). In an optional third step, the network node 16 transmits to the WD 22 the user data which was carried in the transmission that the host computer 24 initiated, in accordance with the teachings of the embodiments described throughout this disclosure (Block S106). In an optional fourth step, the WD 22 executes a client application, such as, for example, the client application 92, associated with the host application 50 executed by the host computer 24 (Block s 108).
FIG. 4 is a flowchart illustrating an exemplary method implemented in a communication system, such as, for example, the communication system of FIG. 1, in accordance with one embodiment. The communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIGS. 1 and 2. In a first step of the method, the host computer 24 provides user data (Block Sl 10). In an optional substep (not shown) the host computer 24 provides the user data by executing a host application, such as, for example, the host application 50. In a second step, the host computer 24 initiates a transmission carrying the user data to the WD 22 (Block Sl 12). The transmission may pass via the network node 16, in accordance with the teachings of the embodiments described throughout this disclosure. In an optional third step, the WD 22 receives the user data carried in the transmission (Block Sl 14).
FIG. 5 is a flowchart illustrating an exemplary method implemented in a communication system, such as, for example, the communication system of FIG. 1, in accordance with one embodiment. The communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIGS. 1 and 2. In an optional first step of the method, the WD 22 receives input data provided by the host computer 24 (Block Sl 16). In an optional substep of the first step, the WD 22 executes the client application 92, which provides the user data in reaction to the received input data provided by the host computer 24 (Block Sl 18). Additionally or alternatively, in an optional second step, the WD 22 provides user data (Block S120). In an optional substep of the second step, the WD provides the user data by executing a client application, such as, for example, client application 92 (Block S122). In providing the user data, the executed client application 92 may further consider user input received from the user. Regardless of the specific manner in which the user data was provided, the WD 22 may initiate, in an optional third substep, transmission of the user data to the host computer 24 (Block S124). In a fourth step of the method, the host computer 24 receives the user data transmitted from the WD 22, in accordance with the teachings of the embodiments described throughout this disclosure (Block S126).
FIG. 6 is a flowchart illustrating an exemplary method implemented in a communication system, such as, for example, the communication system of FIG. 1, in accordance with one embodiment. The communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIGS. 1 and 2. In an optional first step of the method, in accordance with the teachings of the embodiments described throughout this disclosure, the network node 16 receives user data from the WD 22 (Block S128). In an optional second step, the network node 16 initiates transmission of the received user data to the host computer 24 (Block S130). In a third step, the host computer 24 receives the user data carried in the transmission initiated by the network node 16 (Block S132).
FIG. 7 is a flowchart of an exemplary process in a network node 16 according to some embodiments of the present disclosure. One or more Blocks and/or functions performed by network node 16 may be performed by one or more elements of network node 16 such as by feedback unit 32 in processing circuitry 68, processor 70, communication interface 60, radio interface 62, etc. In some embodiments, the method is for a network node 16 that is configured for opportunities to transmit communication on a physical downlink shared channel, PDSCH, within a slot to the wireless device 22. The method includes indicating (Block S134), such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, a sequence of Hybrid Automatic Repeat reQuest
Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device 22. The method includes transmitting (Block S136), such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, on the PDSCH in one of the opportunities within the slot. In some embodiments, the method includes determining (Block S138), such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, a HARQ-ACK opportunity in the indicated sequence of HARQ- ACK opportunities for the wireless device 22, based on the one of the opportunities for transmitting on the PDSCH in which the PDSCH is transmitted. The method includes as a result of transmitting on the PDSCH, receiving (Block S140), such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities for the wireless device 22.
In some embodiments, the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols. In some embodiments, the sequence of HARQ-ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier. In some embodiments, receiving the HARQ-ACK further includes receiving, such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, the HARQ-ACK in the physical uplink channel at the earliest HARQ- ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ- ACK opportunity being based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device 22. In some embodiments, indicating the sequence of HARQ-ACK opportunities within the slot further includes indicating, such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot. In some embodiments, the sequence of HARQ-ACK opportunities corresponds to the opportunities for transmitting on the PDSCH.
In some embodiments, the method further includes indicating, such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, a subpattem of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities. In some embodiments, the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset. In some embodiments, the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities. In some embodiments, indicating the sequence of HARQ-ACK opportunities further includes indicating, such as by feedback unit 32, processing circuitry 68, processor 70, communication interface 60 and/or radio interface 62, the sequence of HARQ- ACK opportunities in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
In one or more embodiments, network node 16 such as via one or more of processing circuitry 68, processor 70, radio interface 62 and communication interface 60 is configured to optionally indicate a sequence of HARQ-ACK opportunities to the wireless device. In one or more embodiments, network node 16 such as via one or more of processing circuitry 68, processor 70, radio interface 62 and communication interface 60 is configured to receive a HARQ-ACK in a physical uplink channel according to the sequence of HARQ-ACK opportunities for the wireless device.
FIG. 8 is a flowchart of an exemplary process in a wireless device 22 according to some embodiments of the present disclosure. One or more Blocks and/or functions performed by wireless device 22 may be performed by one or more elements of wireless device 22 such as by determination unit 34 in processing circuitry 84, processor 86, radio interface 82, etc. In some embodiments, a method is for a wireless device 22 that is configured for opportunities to receive communication on a physical downlink shared channel, PDSCH, within a slot. The method includes receiving (Block S142), such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, an indication of a sequence of Hybrid
Automatic Repeat reQuest Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device 22. The method includes receiving (Block S144), such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, on the PDSCH in one of the opportunities within the slot. The method includes determining (Block S146), such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device 22, based on the one of the opportunities for receiving on the PDSCH in which the PDSCH is received. The method includes transmitting (Block S148), such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in response to the receiving on the PDSCH.
In some embodiments, the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols. In some embodiments, the sequence of HARQ-ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier. In some embodiments, determining the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities further includes determining the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities that is an earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being determined based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device 22. In some embodiments, receiving the indication of the sequence of HARQ-ACK opportunities within the slot further includes receiving, such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, an indication of a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot. In some embodiments, the sequence of HARQ-ACK opportunities corresponds to the opportunities for receiving on the PDSCH. In some embodiments, the method further includes receiving, such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, an indication of a subpattem of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities. In some
embodiments, the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset. In some embodiments, the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities. In some embodiments, receiving the indication of the sequence of HARQ-ACK opportunities further includes receiving, such as by determination unit 34, processing circuitry 84, processor 86 and/or radio interface 82, the indication in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
In one or more embodiments, wireless device 22 such as via one or more of processing circuitry 84, processor 86 and radio interface 82 is configured to optionally receive an indication of a sequence of HARQ-ACK opportunities for the wireless device 22. In one or more embodiments, wireless device 22 such as via one or more of processing circuitry 84, processor 86 and radio interface 82 is configured to determine a sequence of HARQ-ACK opportunities for the wireless device 22. In one or more embodiments, wireless device 22 such as via one or more of processing circuitry 84, processor 86 and radio interface 82 is configured to transmit a HARQ- ACK in a physical uplink channel according to the sequence of HARQ-ACK opportunities.
In one or more embodiments described herein, the sequence of HARQ-ACK opportunities are derived from a set of HARQ-ACK opportunities and a periodicity of HARQ-ACK opportunities within the set.
In one or more embodiments described herein, the sequence of HARQ-ACK opportunities is based at least in part on non-periodic physical downlink channel transmissions, the sequence of HARQ-ACK opportunities being defined at least in part by a pattern of HARQ-ACK opportunities. In one or more embodiments described herein, the pattern of HARQ-ACK opportunities includes a subpattern of HARQ-ACK opportunities that align with channel state information, CSI, transmission opportunities. In one or more embodiments described herein, the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset. In one or more embodiments described herein, the sequence of HARQ-ACK
opportunities are part of a plurality of preconfigured set of sequences of HARQ-ACK opportunities. Generally,“sequence” refers to at least two such that a sequence of HARQ-ACK opportunities refers to at least two HARQ-ACK opportunities. The sequence may be one or more of periodic, non-periodic, preconfigured, defined by a pattern, etc., as described herein with respect to the configuration of HARQ-ACK opportunities. Further, the sequence of HARQ-ACK opportunities may be indicated and/or signal and/or communicated, in one or more embodiments, to the wireless device 22 such as via one or more fields, indicators, etc. and/or may be preconfigured such that the sequence applies during the absence of an indication, as described herein.
Having generally described arrangements for configuration of HARQ-ACK opportunities in the physical uplink channel, details for these arrangements, functions and processes are provided as follows, and which may be implemented by the network node 16, wireless device 22 and/or host computer 24.
Embodiments provide for the communication of HARQ-ACK (an example of feedback) according to a sequence of HARQ-ACK opportunities, as described herein.
Section 1 : Embodiment: HARQ-ACK opportunity periodicity
PDSCH configuration based.
In one or more embodiments, the PDSCH-Config information element (IE) (as described in 3GPP TS 38.331, Section 6.3.2) is extended (i.e., modifying, configured, etc.) with a reference to a PUCCH resource identity with a periodicity, as indicated in BOLD below, for example:
PDSCH-Config ::= SEQUENCE {
dataScramblingldentityPDSCH INTEGER (0 .1023)
OPTIONAL, - Need S
dmrs-DownlinkForPDSCH-MappingTypeA SetupRelease { DMRS-
DownlinkConfig } OPTIONAL, — Need M
dmrs-DownlinkForPDSCH-MappingTypeB SetupRelease { DMRS-
DownlinkConfig } OPTIONAL, — Need M tci- State sT o AddModList SEQUENCE (SIZE(l..maxNrofICI-States)) OF TCI- State O < PTIONAL, — Need N tci-StatesToReleaseList SEQUENCE (SIZE(E.maxNrofTCI-States)) OF
TCI-Stateld OPTIONAL, - Need N
vrb-ToPRB-Interleaver ENUMERATED {n2, n4}
OPTIONAL, - Need S
resourceAllocation ENUMERATED { resourceAllocationTypeO, resourceAllocationTypel, dynamic Switch},
pdsch-TimeDomainAllocationList SetupRelease { PDSCH-
TimeDomainResourceAllocationList } OPTIONAL, — Need M
pdsch-AggregationF actor ENUMERATED { n2, n4, n8 }
OPTIONAL, - Need S
rateMatchPatternToAddModList SEQUENCE (SIZE
(T.maxNrofRateMatchPatterns)) OF RateMatchPattern OPTIONAL, — Need N rateMatchPattemToReleaseList SEQUENCE (SIZE
(1..maxNrofRateMatchPatterns)) OF RateMatchPatternld OPTIONAL, — Need N rateMatchPatternGroupl RateMatchPatternGroup OPTIONAL, —
Need R
rateMatchPattemGroup2 RateMatchPatternGroup OPTIONAL, —
Need R rbg-Size ENUMERATED (configl, config2},
mcs-Table ENUMERATED (qam256, qam64LowSE}
OPTIONAL, - Need S
maxNrofCodeWordsScheduledByDCI ENUMERATED (nl, n2}
OPTIONAL, — Need R prb-BundlingType CHOICE {
staticBundling SEQUENCE {
bundleSize ENUMERATED { n4, wideband }
OPTIONAL - Need S
},
dynamicBundling SEQUENCE {
bundleSizeSetl ENUMERATED { n4, wideband, n2- wideband, n4-wideband } OPTIONAL, - Need S
bundleSizeSet2 ENUMERATED { n4, wideband }
OPTIONAL - Need S
}
},
zp-CSI-RS-ResourceToAddModList SEQUENCE (SIZE
(1. maxNrofZP-CSI-RS-Resources)) OF ZP-CSI-RS-Resource OPTIONAL, - Need N
zp-CSI-RS-ResourceToReleaseList SEQUENCE (SIZE (1..maxNrofZP-
CSI-RS-Resources)) OF ZP-CSI-RS-Resourceld OPTIONAL, - Need N
aperiodic-ZP-CSI-RS-ResourceSetsToAddModList SEQUENCE (SIZE
(T.maxNrofZP-CSI-RS-ResourceSets)) OF ZP-CSI-RS-ResourceSet OPTIONAL, - Need N
aperiodic-ZP-CSI-RS-ResourceSetsToReleaseList SEQUENCE (SIZE
(1. maxNrofZP-CSI-RS-ResourceSets)) OF ZP-CSI-RS-ResourceSetld OPTIONAL, - NeedN
sp-ZP-CSI-RS-ResourceSetsToAddModList SEQUENCE (SIZE (1. maxNrofZP- CSI-RS-ResourceSets)) OF ZP-CSI-RS-ResourceSet OPTIONAL, - Need N sp-ZP-CSI-RS-ResourceSetsToReleaseList SEQUENCE (SIZE (l . maxNrofZP- CSI-RS-ResourceSets)) OF ZP-CSI-RS-ResourceSetld OPTIONAL, - Need N p-ZP-CSI-RS-ResourceSet SetupRelease { ZP-CSI-RS-ResourceSet }
OPTIONAL, — Need M
periodicalPucchResourceId-rell6 PUCCH-Resourceld
OPTIONAL,
periodicalPucchResourcePeriodicity-rell6 CHOICE { pi, p2,..,}
OPTIONAL,
}
In one example, the PUCCH resource list may include an entry indicating a
PUCCH resource in OFDM symbol 1 within a slot. Let the PUCCH resource ID be X, then by, for example:
periodicalPucchResourceId-rell6 = X
periodicalPucchResourcePeriodicity-rell6 =“2 OFDM symbols”. In one or more embodiments, periodicalPucchResourceId-rell6 and/or periodicalPucchResourcePeriodicity-rell6 define a sequence of HARQ-ACK opportunities for the wireless device.
The wireless device 22 could be indicated“X” in, for example, the PUCCH resource indicator field in the DCI that would reference the locations ( 1, 3,..., 13} as possible Orthogonal Frequency Division Multiplex (OFDM) symbols for HARQ- ACK transmissions. But due to the HARQ-ACK timing and wireless device 22 processing capabilities, there may only be one of these possible locations where the wireless device 22, at the earliest, can send a HARQ-ACK transmission. For example, if the PDSCH ended in symbol 4 of the slot (in other words, the last symbol of the PDSCH is symbol 4 of the slot) and the wireless device 22 could send HARQ-ACK not earlier, for example, than after 5 OFDM symbols after the symbol where PDSCH ended. Then, the earliest symbol where HARQ-ACK can be transmitted, in this example, is symbol 10. Therefore, with a rule that the wireless device 22 uses the earliest possible PUCCH resource for HARQ-ACK transmission which is symbol 11 (since 11 belong to the indicated HARQ-ACK opportunity locations ( 1, 3,..., 13} but not 10, in this example) there is no ambiguity in the network node 16 when HARQ- ACK is transmitted by wireless device 22.
In some examples, periodical PUCCH resources are only referencing Type B transmissions such as if the transmission of Type A periodicity of PUCCH resource is not supported.
PUCCH configuration based.
Alternatively, in some embodiments, the periodic PUCCH resource configuration is defined by extending (i.e., modifying existing standards) PUCCH- Config IE in radio resource control (RRC) signalling. This is illustrated below as an example, where the modifications may be illustrated in BOLD.
PUCCH-formatl ::= SEQUENCE {
initialCyclicShift INTEGER(O. l l),
nrofSymbols INTEGER (4 .14),
startingSymbollndex INTEGER(O. lO),
timeDomainOCC INTEGER(0..6)
periodicity-rell6 CHOICE { pi, p2,..,}
OPTIONAL,
}
PUCCH- format2 ::= SEQUENCE {
nrofPRBs INTEGER (1 .16),
nrofSymbols INTEGER (1 .2),
startingSymbollndex INTEGER(0.. l3)
periodicity-rell6 CHOICE { pi, p2,..,}
OPTIONAL,
}
PUCCH- format3 ::= SEQUENCE {
nrofPRBs INTEGER (1 .16),
nrofSymbols INTEGER (4 .14),
startingSymbollndex INTEGER(O. lO)
periodicity-rell6 CHOICE { pi, p2,..,}
OPTIONAL,
}
PUCCH- format4 ::= SEQUENCE {
nrofSymbols INTEGER (4 .14),
occ-Length ENUMERATED {n2,n4},
occ-Index ENUMERATED {n0,nl,n2,n3},
startingSymbollndex INTEGER(O. lO)
periodicity-rell6 CHOICE { pi, p2,..,}
OPTIONAL, }
In some embodiments, the periodicity P is in units of OFDM symbols, and indicates the multiple starting points of PUCCH resources within a slot. In one or more embodiments, the periodicity at least in part defines a sequence of HARQ-ACK opportunities. Denote startingSymbolIndex as S, and nrofSymbols as Ns. The PUCCH resources can start at S+j*P, j=0, 1,.., J-l. To help ensure that the last PUCCH resource ends before the last OFDM symbol in the slot (which has symbol index 13), the following may be satisfied:
S+(J-l) * P + Ns <=14
This gives:
J <= 1+ floor( (14 - Ns - S ) / P).
To maintain the multiplexing capability of PUCCH resource among multiple wireless devices 22, the periodicity P may be greater than or equal to Ns, i.e., P >= Ns. Otherwise, two adjacent PUCCH resources (for example, corresponding to jo and jo+l) defined by the periodicity may overlap, and may destroy the orthogonality, if one wireless device 22 transmits using PUCCH resource of jo, while another wireless device 22 transmits using PUCCH resource of jo+l.
FIG. 9 is a diagram of an example of short PUCCH that occupies 1 OFDM symbol (os) (i.e., Ns=l), S=0, P=3. A total of 5 periodic PUCCH resources are defined in a slot. FIG. 10 is a diagram of an example of Short PUCCH that occupies 2 OFDM symbol (i.e., Ns=2), without intra-slot frequency hopping: S=0, P=4. A total of 4 periodic PUCCH resources are defined in a slot. FIG. 11 is a diagram of an example of Short PUCCH that occupies 2 OFDM symbol (i.e., Ns=2), with intra-slot frequency hopping: S=0, P=4. A total of 4 periodic PUCCH resources are defined in a slot. FIG. 12 is a diagram of an example of long PUCCH that occupies 4 OFDM symbol (i.e., Ns=4), without intra-slot frequency hopping: S=0, P=5. A total of 3 periodic PUCCH resources are defined in a slot, each of the 3 periodic PUCCH resources including demodulation reference signal (DM-RS) symbols, and uplink control information (UCI) symbols (e.g., HARQ-ACK may be transmitted in a UCI symbol). FIG. 13 is a diagram of an example of long PUCCH that occupies 4 OFDM symbol (i.e., Ns=4), with intra-slot frequency hopping: S=0, P=5. A total of 3 periodic PUCCH resources are defined in a slot, each of the PUCCH resources including DM- RS symbols, and UCI symbol. In one or more figures, one or more of the shaded OFDM symbols correspond to a sequence of HARQ-ACK opportunities.
In some embodiments, multiple PUCCH resources are indicated by a list of startingSymbollndex. For example,
PUCCH-formatl ::= SEQUENCE !
initialCyclicShift INTEGER(0..11), nrofSymbols INTEGER (4..14), startingSymbollndex SEQUENCE (SIZE(l ..X)) OF
INTEGER(O. lO),
timeDomainOCC INTEGER(0..6)
}
Section 2: Embodiment: HARQ-ACK opportunity pattern
When PDSCH transmissions in a slot is not periodic and has different lengths
(for example first transmission in the slot has a length of 2 OFDM symbols and the second transmission has a length of 4 OFDM symbols), a pattern can be defined for showing or indicating (e.g., by the network node 16) to the wireless device 22 all possible PUCCH opportunities for transmitting HARQ-ACK. As above, the number of OFDM symbols in each PUCCH transmission is RRC-configured by parameter nrofSymbols as Ns. In this example, the PDSCH-Config information element (as described for example in 3GPP TS 38.331, Section 6.3.2) is extended (i.e., modified from the existing standard(s)) with a reference to a PUCCH resource pattern as indicated in BOLD, for example:
PDSCH-Config ::= SEQUENCE {
dataScramblingldentityPDSCH INTEGER (0..1023)
OPTIONAL, - Need S
dmrs-DownlinkForPDSCH-MappingTypeA SetupRelease { DMRS- DownlinkConfig } OPTIONAL, — Need M
dmrs-DownlinkForPDSCH-MappingTypeB SetupRelease { DMRS- DownlinkConfig } OPTIONAL, — Need M tci-StatesToAddModList SEQUENCE (SIZE(l..maxNrofTCI-States))
OF TCI- State OPTIONAL, - Need N
tci-StatesToReleaseList SEQUENCE (SIZE(l..maxNrofTCI-States)) OF
TCI-Stateld OPTIONAL, - Need N
vrb-ToPRB-Interleaver ENUMERATED (n2, n4}
OPTIONAL, - Need S resourceAllocation ENUMERATED { resourceAllocationTypeO, resourceAllocationTypel, dynamic Switch},
pdsch-TimeDomainAllocationList SetupRelease { PDSCH-
TimeDomainResourceAllocationList } OPTIONAL, — Need M
pdsch-AggregationF actor ENUMERATED { n2, n4, n8 }
OPTIONAL, - Need S
rateMatchPatternToAddModList SEQUENCE (SIZE
(T.maxNrofRateMatchPatterns)) OF RateMatchPattern OPTIONAL, — Need N rateMatchPattemToReleaseList SEQUENCE (SIZE
(T.maxNrofRateMatchPatterns)) OF RateMatchPatternld OPTIONAL, — Need N rateMatchPatternGroupl RateMatchPatternGroup OPTIONAL, —
Need R
rateMatchPattemGroup2 RateMatchPatternGroup OPTIONAL, —
Need R rbg-Size ENUMERATED (configl, config2},
mcs-Table ENUMERATED (qam256, qam64LowSE}
OPTIONAL, - Need S
maxNrofCodeWordsScheduledByDCI ENUMERATED (nl, n2}
OPTIONAL, - Need R prb-BundlingType CHOICE {
staticBundling SEQUENCE {
bundleSize ENUMERATED { n4, wideband }
OPTIONAL - Need S
},
dynamicBundling SEQUENCE {
bundleSizeSetl ENUMERATED { n4, wideband, n2- wideband, n4-wideband } OPTIONAL, - Need S
bundleSizeSet2 ENUMERATED { n4, wideband }
OPTIONAL - Need S
}
},
zp-CSI-RS-ResourceToAddModList SEQUENCE (SIZE
(1. maxNrofZP-CSI-RS-Resources)) OF ZP-CSI-RS-Resource OPTIONAL, - Need N
zp-CSI-RS-ResourceToReleaseList SEQUENCE (SIZE (1..maxNrofZP-
CSI-RS-Resources)) OF ZP-CSI-RS-Resourceld OPTIONAL, - Need N
aperiodic-ZP-CSI-RS-ResourceSetsToAddModList SEQUENCE (SIZE
(T.maxNrofZP-CSI-RS-ResourceSets)) OF ZP-CSI-RS-ResourceSet OPTIONAL, - Need N
aperiodic-ZP-CSI-RS-ResourceSetsToReleaseList SEQUENCE (SIZE
(1. maxNrofZP-CSI-RS-ResourceSets)) OF ZP-CSI-RS-ResourceSetld OPTIONAL, - NeedN
sp-ZP-CSI-RS-ResourceSetsToAddModList SEQUENCE (SIZE (1. maxNrofZP- CSI-RS-ResourceSets)) OF ZP-CSI-RS-ResourceSet OPTIONAL, - Need N sp-ZP-CSI-RS-ResourceSetsToReleaseList SEQUENCE (SIZE (E.maxNrofZP- CSI-RS-ResourceSets)) OF ZP-CSI-RS-ResourceSetld OPTIONAL, - Need N p-ZP-CSI-RS-ResourceSet SetupRelease { ZP-CSI-RS-ResourceSet }
OPTIONAL, — Need M
PucchResourcePattern-rell6 CHOICE { pattern 1, pattern 2,..,}
OPTIONAL,
For example, pattern 1 is an index to a pattern that allows PUCCH
transmission on 2, 7 and 11 OFDM symbols, i.e.., sequence ofHARQ-ACK opportunities corresponding to OFDM symbols 2, 7 and 11 in a slot. This is shown in FIG. 14, for Ns=l where this figure is a diagram of an example short PUCCH that occupies 1 OFDM symbol (i.e., Ns =1), in which a non-periodic PUCCH is defined in OFDM symbols 2, 7 and 11 of a slot. For the given example in the“PDSCH configuration based” section above, if the PDSCH ended in symbol 4 of the slot and the wireless device 22 could send HARQ-ACK not earlier than after 5 OFDM symbols after the symbol where PDSCH ended. Then, the earliest symbol where HARQ-ACK can be transmitted is symbol 10. Therefore, with a rule that the wireless devices 22 uses the earliest possible PUCCH resource for HARQ-ACK transmission, this earliest possible PUCCH resource would be symbol 11 when Pattern 1 is used since, e.g., symbol 11 is in the indicated sequence ofHARQ-ACK opportunities, symbols (2, 7 and 11 } in a slot. Other patterns (i.e., configuration of OFDM symbols to provide opportunities for HARQ-ACK transmission) are possible in view of the teachings of the disclosure.
Further, in some embodiments, an option can be elaborated related to simultaneous CSI and HARQ transmission. If, for example, the layer parameter simultaneousHARQ-ACK-CSI is enabled by network node 16, PUCCH format 2-4 may be utilized for UCI transmission by the wireless device 22 for simultaneous HARQ-ACK and CSI information. However, for recurring PUCCH resource according to the pattern in a slot, all occasions may not be required to deliver CSI and therefore a simultaneousHARQ-ACK-CSI recurrence pattern may be used as a subset of PUCCH resource pattern accordingly. That is, for example, a first pattern defining or corresponding to a configuration of OFDM symbols to provide opportunities for HARQ-ACK transmission is provided where a sub-pattern or pattern within a pattern may also be provided where this subpattem or sequence defines or corresponds to a pattern for simultaneous HARQ-ACK and CSI transmission by the wireless device 22. Generally, this example may be provided as follows, for example:
simultaneousHARQ-ACK-CSI-enabled SEQUENCE {
simultaneousHARQ-ACK-CSI-Pattern {subpattem 1 c pattern 1, subpattem 2 £ pattern
Figure imgf000043_0001
OPTIONAL,
}
where subpattem 1 is a subset of pattern pl (example in section 1) or pattern 1 (example in section 2), i.e., subpattem 1 £ pl or subpattem 1 £ pattern 1.
Section 3 : HARQ-ACK processing time offset
In some cases, the PUCCH resource indicator may not be present the DCI. Instead, the PUCCH resource may be semi- statically configured. The section 1, above, can be applied where the actual starting symbol of HARQ-ACK depends on the periodicity and the starting symbol of the PUCCH resource obtained from the semi-statically configured PUCCH resource ID.
When the PUCCH resource is fixed according to the configured value, PUCCH transmission opportunities can be limited. In some scenarios, the configured value can be restrictive when trying to allow fast HARQ-ACK transmission for a latency critical service, or may even be an invalid value with respect to the minimum wireless device 22 processing time.
In the absence of a PUCCH resource indicator field in the DCI, HARQ-ACK timing can be based on the minimum wireless device 22 processing time for preparing HARQ-ACK (i.e., Ni+di,i symbols as, for example, in Subclause 5.3 in 3GPP TS 38.214) plus an additional HARQ-ACK processing time offset, where the offset may be a modification to existing standards. That is, in some embodiments, HARQ-ACK is sent by the wireless device 22 at the earliest periodic opportunity after
Ni+du+offset symbols after the end of PDSCH. Thus, there can be no ambiguity of the actual HARQ-ACK timing at both network node 16 and wireless device 22. In one or more embodiments, the earliest periodic opportunity after Ni+du+offset symbols after the end of PDSCH may correspond to a pattern. In one or more embodiments, the sequence of HARQ-ACK opportunities is based on offset symbol(s). The offset can be introduced as a parameter in PDSCH-Config information element or PUCCH-config IE, for example, similarly to how the periodicity parameter is introduced in the“PDSCH configuration based” section and“PUCCH
configuration based” section above. The offset value of 0 symbol or more can be configured. The offset may provide flexibility to the network node 16 to further configure the PUCCH resource and to the wireless device 22 to allow for potentially less strict HARQ-ACK timing.
Example:
URLLC service may operate using a new DCI format which does not contain a PUCCH resource indicator field. The PUCCH resource may be semi- statically configured while the HARQ-ACK timing may be fixed to the earliest possible PUCCH opportunity. Assuming that PUCCH resource periodicity is 2 symbols, the resulting possible HARQ-ACK opportunities are at symbol # {0, 2, 4, 6, 8, 10, 12} in a slot, i.e., one example of the sequence of HARQ-ACK opportunities. Also, in this example, it may be assumed that the minimum HARQ-ACK wireless device 22 processing time (Nl+dl,l) is 4 symbols, and HARQ-ACK processing time offset is 1 symbol. If the PDSCH transmission by the network node 16 ends in symbol #3 of the slot, the wireless device 22 is expected to send HARQ-ACK in symbol #9. However, according to the periodic PUCCH resources symbols (0, 2, 4, 6, 8, 10, 12}, the earliest PUCCH resource opportunity at symbol#! 0 is used. Here, the actual HARQ- ACK timing overwrites the timing in the configured PUCCH resource.
Example: PUCCH resource set indicator
In some embodiments, the PUCCH resource indicator in the DCI is interpreted as a PUCCH resource set indicator. The wireless device 22 may be configured with up to 8 PUCCH resource sets wherein the PUCCH resource indicator field in DCI may be interpreted according to Table 4 below.
TABLE 4: Mapping of PUCCH resource indication field values to a PUCCH resource in a PUCCH resource set with maximum 8 PUCCH resources
Figure imgf000045_0001
In such embodiments, there may be more than 8 PUCCH resources in the table of PUCCH resources but instead of determining the PUCCH resource based on index of a first CCE, the wireless device 22 determines the PUCCH as the first valid PUCCH resource within the set that meets the wireless device 22 processing time. For example, in the example in“PDSCH configuration based” above: a PUCCH resource indicator“X” in the PUCCH resource indicator field in the DCI can reference PUCCH resources with starting symbols 1, 3,.. and 13, respectively. If the PDSCH, e.g., ended in symbol 4 of the slot and wireless device 22 could send HARQ-ACK not earlier than after 5 OFDM symbols after the symbol where PDSCH ended, then the earliest symbol where HARQ-ACK can be transmitted is symbol 10. Therefore, the wireless device 22 uses the PUCCH resource for HARQ-ACK transmission with starting symbol 11.
Some embodiments may include one or more of the following:
Embodiment Al . A network node configured to communicate with a wireless device (WD), the network node configured to, and/or comprising a radio interface and/or comprising processing circuitry configured to:
optionally indicate a sequence of HARQ-ACK opportunities for the wireless device; and
receive a HARQ-ACK in a physical uplink channel according to the sequence of HARQ-ACK opportunities for the wireless device.
Embodiment A2. The network node of Embodiment Al, wherein the sequence of HARQ-ACK opportunities are derived at least in part from a set of HARQ-ACK opportunities and a periodicity of HARQ-ACK opportunities within the set. Embodiment A3. The network node of Embodiment Al , wherein the sequence of HARQ-ACK opportunities is based at least in part on non-periodic physical downlink channel transmissions, the sequence of HARQ-ACK opportunities being defined at least in part by a pattern of HARQ-ACK opportunities.
Embodiment A4. The network node of Embodiment A3, wherein the pattern of HARQ-ACK opportunities includes a subpattem of HARQ-ACK opportunities that align with channel state information, CSI, transmission
opportunities.
Embodiment A5. The network node of Embodiment Al, wherein the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
Embodiment A6. The network node of Embodiment Al, wherein the sequence of HARQ-ACK opportunities are part of a plurality of preconfigured set of sequences of HARQ-ACK opportunities.
Embodiment B 1. A method implemented in a network node, the method comprising;
optionally indicating a sequence of HARQ-ACK opportunities to a wireless device; and
receiving a HARQ-ACK in a physical uplink channel according to the sequence of HARQ-ACK opportunities for the wireless device.
Embodiment B2. The method of Embodiment Bl, wherein the sequence of HARQ-ACK opportunities are derived at least in part from a set of HARQ-ACK opportunities and a periodicity of HARQ-ACK opportunities within the set.
Embodiment B3. The method of Embodiment B 1 , wherein the sequence of HARQ-ACK opportunities is based at least in part on non-periodic physical downlink channel transmissions, the sequence of HARQ-ACK opportunities being defined by a pattern of HARQ-ACK opportunities.
Embodiment B4. The method of Embodiment B3, wherein the pattern of HARQ-ACK opportunities includes a subpattern of HARQ-ACK opportunities that align with channel state information, CSI, transmission opportunities.
Embodiment B5. The method of Embodiment Bl, wherein the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset. Embodiment B6. The method of Embodiment Bl, wherein the sequence of HARQ-ACK opportunities are part of a plurality of preconfigured set of sequences of HARQ-ACK opportunities.
Embodiment Cl . A wireless device (WD) configured to communicate with a network node, the WD configured to, and/or comprising a radio interface and/or processing circuitry configured to:
optionally receive an indication of a sequence of HARQ-ACK opportunities for the wireless device;
determine a sequence of HARQ-ACK opportunities for the wireless device; and
transmit a HARQ-ACK in a physical uplink channel according to the determined sequence of HARQ-ACK opportunities.
Embodiment C2. The WD of Embodiment Cl, wherein the sequence of HARQ-ACK opportunities are derived at least in part from a set of HARQ-ACK opportunities and a periodicity of HARQ-ACK opportunities within the set.
Embodiment C3. The WD of Embodiment Cl, wherein the sequence of HARQ-ACK opportunities is based at least in part on non-periodic physical downlink channel transmissions, the sequence of HARQ-ACK opportunities being defined at least in part by a pattern of HARQ-ACK opportunities.
Embodiment C4. The WD of Embodiment C3, wherein the pattern of HARQ-ACK opportunities includes a subpattern of HARQ-ACK opportunities that align with channel state information, CSI, transmission opportunities.
Embodiment C5. The WD of Embodiment Cl, wherein the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
Embodiment C6. The WD of Embodiment Cl, wherein the sequence of HARQ-ACK opportunities are part of a plurality of preconfigured set of sequences of HARQ-ACK opportunities.
Embodiment Dl . A method implemented in a wireless device (WD), the method comprising:
optionally receiving an indication of a sequence of HARQ-ACK opportunities for the wireless device; determining a sequence of HARQ-ACK opportunities for the wireless device; and
transmitting a HARQ-ACK in a physical uplink channel according to the determined sequence of HARQ-ACK opportunities.
Embodiment D2. The method of Embodiment Dl, wherein the sequence of HARQ-ACK opportunities are derived at least in part from a set of HARQ-ACK opportunities and a periodicity of HARQ-ACK opportunities within the set.
Embodiment D3. The method of Embodiment Dl, wherein the sequence of HARQ-ACK opportunities is based at least in part on non-periodic physical downlink channel transmissions, the sequence of HARQ-ACK opportunities being defined by a pattern of HARQ-ACK opportunities.
Embodiment D4. The method of Embodiment D3, wherein the pattern of HARQ-ACK opportunities includes a subpattern of HARQ-ACK opportunities that align with channel state information, CSI, transmission opportunities.
Embodiment D5. The method of Embodiment D 1 , wherein the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
Embodiment D6. The method of Embodiment Dl, wherein the sequence of HARQ-ACK opportunities are part of a plurality of preconfigured set of sequences of HARQ-ACK opportunities.
As will be appreciated by one of skill in the art, the concepts described herein may be embodied as a method, data processing system, computer program product and/or computer storage media storing an executable computer program. 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.” Any process, step, action and/or functionality described herein may be performed by, and/or associated to, a corresponding module, which may be implemented in software and/or firmware and/or hardware. 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.
Some embodiments are described herein with reference to flowchart illustrations and/or block diagrams of methods, systems and computer program products. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer (to thereby create a special purpose computer), special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer readable memory or storage medium that can direct a computer or other
programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instruction means which implement the function/act specified in the flowchart and/or block diagram block or blocks.
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.
It is to be understood that the functions/acts noted in the blocks may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Although some of the diagrams include arrows on communication paths to show a primary direction of communication, it is to be understood that
communication may occur in the opposite direction to the depicted arrows. 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++. However, 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. In the latter scenario, 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).
Many different embodiments have been disclosed herein, in connection with the above description and the drawings. It will be understood that it would be unduly repetitious and obfuscating to literally describe and illustrate every combination and subcombination of these embodiments. Accordingly, all embodiments can be combined in any way and/or combination, and the present specification, including the drawings, shall be construed to constitute a complete written description of all combinations and subcombinations of the embodiments described herein, and of the manner and process of making and using them, and shall support claims to any such combination or subcombination.
It will be appreciated by persons skilled in the art that the embodiments described herein are not limited to what has been particularly shown and described herein above. In addition, unless mention was made above to the contrary, it should be noted that all of the accompanying drawings are not to scale. A variety of modifications and variations are possible in light of the above teachings without departing from the scope of the following claims.

Claims

What is claimed is:
1. A method for a wireless device (22) that is configured for opportunities to receive communication on a physical downlink shared channel, PDSCH, within a slot, the method comprising:
receiving (S142) an indication of a sequence of Hybrid Automatic Repeat reQuest Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device (22);
receiving (S144) on the PDSCH in one of the opportunities within the slot; determining (S146) a HARQ-ACK opportunity in the indicated sequence of
HARQ-ACK opportunities for the wireless device (22), based on the one of the opportunities for receiving on the PDSCH in which the PDSCH is received; and
transmitting (S148) a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in response to the receiving on the PDSCH.
2. The method of Claim 1, wherein the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols.
3. The method of any one of Claims 1 and 2, wherein the sequence of HARQ- ACK opportunities within the slot belong to a same physical uplink control channel,
PUCCH, resource associated to a PUCCH resource identifier.
4. The method of any one of Claims 1-3, wherein determining the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities further comprises:
determining the HARQ-ACK opportunity in the indicated sequence of HARQ- ACK opportunities that is an earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being determined based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device.
5. The method of any one of Claims 1-4, wherein receiving the indication of the sequence of HARQ-ACK opportunities within the slot further comprises:
receiving an indication of a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot.
6. The method of any one of Claims 1-5, wherein the sequence of HARQ-ACK opportunities corresponds to the opportunities for receiving on the PDSCH.
7. The method of any one of Claims 1-6, further comprising:
receiving an indication of a subpattem of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities.
8. The method of any one of Claims 1-4, wherein the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
9. The method of any one of Claims 1-4, wherein the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities.
10. The method of any one of Claims 1-9, wherein receiving the indication of the sequence of HARQ-ACK opportunities further comprises:
receiving the indication in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
11. A wireless device (22) that is configured for opportunities to receive communication on a physical downlink shared channel, PDSCH, within a slot, the wireless device (22) comprising processing circuitry (84), the processing circuitry (84) configured to cause the wireless device (22) to:
receive an indication of a sequence of Hybrid Automatic Repeat reQuest Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device (22); receive on the PDSCH in one of the opportunities within the slot;
determine a HARQ-ACK opportunity in the indicated sequence of HARQ- ACK opportunities for the wireless device (22), based on the one of the opportunities for receiving on the PDSCH in which the PDSCH is received; and
transmit a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in response to the receiving on the PDSCH.
12. The wireless device (22) of Claim 11, wherein the slot comprises 14
Orthogonal Frequency Division Multiplexed, OFDM, symbols.
13. The method of any one of Claims 11 and 12, wherein the sequence of HARQ- ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier.
14. The wireless device (22) of any one of Claims 11-13, wherein the processing circuitry (84) is further configured to cause the wireless device (22) to determine the HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities by being configured to cause the wireless device (22) to:
determine the HARQ-ACK opportunity in the indicated sequence of HARQ- ACK opportunities that is an earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being determined based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device.
15. The wireless device (22) of any one of Claims 11-14, wherein the processing circuitry (84) is further configured to cause the wireless device (22) to receive the indication of the sequence of HARQ-ACK opportunities within the slot by being configured to cause the wireless device (22) to:
receive an indication of a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot.
16. The wireless device (22) of any one of Claims 11-15, wherein the sequence of HARQ-ACK opportunities corresponds to the opportunities for receiving on the PDSCH.
17. The wireless device (22) of any one of Claims 11-16, wherein the processing circuitry (84) is further configured to cause the wireless device (22) to:
receive an indication of a subpattem of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities.
18. The wireless device (22) of any one of Claims 11-14, wherein the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
19. The wireless device (22) of any one of Claims 11-14, wherein the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities.
20. The wireless device (22) of any one of Claims 11-19, wherein the processing circuitry (84) is further configured to cause the wireless device (22) to receive the indication of the sequence of HARQ-ACK opportunities by being configured to cause the wireless device (22) to:
receive the indication in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
21. A method for a network node (16) that is configured for opportunities to transmit communication on a physical downlink shared channel, PDSCH, within a slot to the wireless device (22), the method comprising:
indicating (S134) a sequence of Hybrid Automatic Repeat reQuest
Acknowledgement, HARQ-ACK, opportunities within the slot for the wireless device (22);
transmitting (S136) on the PDSCH in one of the opportunities within the slot; determining (S138) a HARQ-ACK opportunity in the indicated sequence of HARQ-ACK opportunities for the wireless device (22), based on the one of the opportunities for transmitting on the PDSCH in which the PDSCH is transmitted; and as a result of transmitting on the PDSCH, receiving (S140) a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities for the wireless device (22).
22. The method of Claim 21, wherein the slot comprises 14 Orthogonal Frequency Division Multiplexed, OFDM, symbols.
23. The method of any one of Claims 21 and 22, wherein the sequence of HARQ- ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier.
24. The method of any one of Claims 21-23, wherein receiving the HARQ-ACK further comprises:
receiving the HARQ-ACK in the physical uplink channel at the earliest HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ-ACK opportunity being based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device.
25. The method of any one of Claims 21-24, wherein indicating the sequence of HARQ-ACK opportunities within the slot further comprises:
indicating a periodicity that at least in part defines the sequence of HARQ- ACK opportunities within the slot.
26. The method of any one of Claims 21-25, wherein the sequence of HARQ- ACK opportunities corresponds to the opportunities for transmitting on the PDSCH.
27. The method of any one of Claims 21-26, further comprising:
indicating a subpattem of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities.
28. The method of any one of Claims 21-24, wherein the sequence of HARQ- ACK opportunities is based at least in part on a symbol offset.
29. The method of any one of Claims 21-24, wherein the sequence of HARQ-
ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ- ACK opportunities.
30. The method of any one of Claims 21-29, wherein indicating the sequence of HARQ-ACK opportunities further comprises:
indicating the sequence of HARQ-ACK opportunities in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
31. A network node (16) that is configured for opportunities to transmit communication on a physical downlink shared channel, PDSCH, within a slot to the wireless device (22), the network node (16) comprising processing circuitry (68), the processing circuitry (68) configured to cause the network node (16) to:
indicate a sequence of Hybrid Automatic Repeat reQuest Acknowledgement,
HARQ-ACK, opportunities within the slot for the wireless device (22);
transmit on the PDSCH in one of the opportunities within the slot;
determine a HARQ-ACK opportunity in the indicated sequence of HARQ- ACK opportunities for the wireless device (22), based on the one of the opportunities for transmitting on the PDSCH in which the PDSCH is transmitted; and
as a result of the transmission on the PDSCH, receive a HARQ-ACK in a physical uplink channel according to the determined HARQ-ACK opportunity in the sequence of HARQ-ACK opportunities for the wireless device (22).
32. The network node (16) of Claim 31, wherein the slot comprises 14 Orthogonal
Frequency Division Multiplexed, OFDM, symbols.
33. The method of any one of Claims 31 and 32, wherein the sequence of HARQ- ACK opportunities within the slot belong to a same physical uplink control channel, PUCCH, resource associated to a PUCCH resource identifier.
34. The network node (16) of any one of Claims 31 and 33, wherein the processing circuitry (68) is further configured to cause the network node (16) to receive the HARQ-ACK by being configured to cause the network node (16) to: receive the HARQ-ACK in the physical uplink channel at the earliest HARQ- ACK opportunity in the sequence of HARQ-ACK opportunities, the earliest HARQ- ACK opportunity being based at least in part on a last symbol of the PDSCH and a processing capability of the wireless device.
35. The network node (16) of any one of Claims 31-34, wherein the processing circuitry (68) is further configured to cause the network node (16) to indicate the sequence of HARQ-ACK opportunities within the slot by being configured to cause the network node (16) to:
indicate a periodicity that at least in part defines the sequence of HARQ-ACK opportunities within the slot.
36. The network node (16) of any one of Claims 31-35, wherein the sequence of HARQ-ACK opportunities corresponds to the opportunities for transmitting on the PDSCH.
37. The network node (16) of any one of Claims 31-36, wherein the processing circuitry (68) is further configured to cause the network node (16) to:
indicate a subpattem of HARQ-ACK opportunities within the slot that align with channel state information, CSI, transmission opportunities.
38. The network node (16) of any one of Claims 31-34, wherein the sequence of HARQ-ACK opportunities is based at least in part on a symbol offset.
39. The network node (16) of any one of Claims 31-34, wherein the sequence of HARQ-ACK opportunities is one in a plurality of preconfigured sets of sequences of HARQ-ACK opportunities.
40. The network node (16) of any one of Claims 31-39, wherein the processing circuitry (68) is further configured to cause the network node (16) to indicate the sequence of HARQ-ACK opportunities by being configured to cause the network node (16) to:
indicate the sequence of HARQ-ACK opportunities in at least one of a physical downlink shared channel, PDSCH, configuration information element, IE, a physical uplink control channel, PUCCH, configuration IE and a downlink control information, DCI, message.
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