WO2022032477A1 - Indication de transmission de paquets de planification semi-persistante (sps) - Google Patents

Indication de transmission de paquets de planification semi-persistante (sps) Download PDF

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Publication number
WO2022032477A1
WO2022032477A1 PCT/CN2020/108432 CN2020108432W WO2022032477A1 WO 2022032477 A1 WO2022032477 A1 WO 2022032477A1 CN 2020108432 W CN2020108432 W CN 2020108432W WO 2022032477 A1 WO2022032477 A1 WO 2022032477A1
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Prior art keywords
sps
indication
resource
configuration
monitoring
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English (en)
Inventor
Siyi Chen
Changlong Xu
Jing Sun
Xiaoxia Zhang
Hao Xu
Rajat Prakash
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Qualcomm Inc
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Qualcomm Inc
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Priority to PCT/CN2020/108432 priority Critical patent/WO2022032477A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • This application relates to wireless communication systems, and more particularly to semi-persistent scheduling (SPS) transmission-specific cancellation or validation.
  • SPS semi-persistent scheduling
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) .
  • a wireless multiple-access communications system may include a number of base stations (BSs) , each simultaneously supporting communications for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • BSs base stations
  • UE user equipment
  • NR next generation new radio
  • LTE long term evolution
  • NR next generation new radio
  • 5G 5 th Generation
  • LTE long term evolution
  • NR next generation new radio
  • NR is designed to provide a lower latency, a higher bandwidth or a higher throughput, and a higher reliability than LTE.
  • NR is designed to operate over a wide array of spectrum bands, for example, from low-frequency bands below about 1 gigahertz (GHz) and mid-frequency bands from about 1 GHz to about 6 GHz, to high-frequency bands such as millimeter wave (mmWave) bands.
  • GHz gigahertz
  • mmWave millimeter wave
  • NR is also designed to operate across different spectrum types, from licensed spectrum to unlicensed and shared spectrum. Spectrum sharing enables operators to opportunistically aggregate spectrums to dynamically support high-bandwidth services. Spectrum sharing can extend the benefit of NR technologies to operating entities that may not have access to a licensed spectrum.
  • a BS may schedule a UE for UL and/or DL communications via dynamic scheduling or semi-persistent scheduling (SPS) .
  • SPS semi-persistent scheduling
  • the BS may transmit a scheduling assignment or grant to schedule the UE for each and every UL transmission and/or each and every DL transmission.
  • the BS may preconfigure the UE with an SPS configuration indicating a periodicity.
  • the UE may not utilize the SPS-based schedule until the BS activate the SPS configuration.
  • the BS may activate the SPS configuration by indicating a resource allocation for the SPS-based schedule. Once activated, the resource allocation may repeat according to the preconfigured periodicity.
  • SPS-based transmission technique improvements may also yield benefits.
  • a base station may configure a user equipment (UE) with multiple semi-persistent scheduling (SPS) configurations.
  • the BS may transmit downlink packets to the UE using SPS resources associated with the SPS configurations.
  • the BS may cancel a specific SPS transmission in a specific SPS resource by indicating to the UE that the transmission in the specific SPS resource is cancelled or that the specific SPS resource is not validated for transmission.
  • the BS may provide the indication to the UE via downlink control information (DCI) signaling (with SPS transmission indication specific-radio network temporary identifier) or waveform sequence transmission (s) .
  • DCI downlink control information
  • a method of wireless communication performed by a user equipment includes receiving, from a base station (BS) , a plurality of semi-persistent scheduling (SPS) configurations; monitoring for an indication of whether a first SPS transmission is to be transmitted in a first SPS resource, the first SPS resource being associated with a first SPS configuration of the plurality of SPS configurations, the indication being specific for at least one of the first SPS resource or the first SPS configuration; and refraining from monitoring the first SPS resource based on the monitoring for the indication.
  • SPS semi-persistent scheduling
  • a method of wireless communication performed by a base station includes transmitting, to a user equipment (UE) , a plurality of semi-persistent scheduling (SPS) configurations; providing, to the UE, an indication of whether a first SPS transmission is to be transmitted in a first SPS resource, the first SPS resource being associated with a first SPS configuration of the plurality of SPS configurations, the indication being specific for at least one of the first SPS resource or the first SPS configuration; and refraining from transmitting the first SPS transmission in the first SPS resource based on the indication.
  • SPS semi-persistent scheduling
  • a user equipment includes a transceiver configured to receive, from a base station (BS) , a plurality of semi-persistent scheduling (SPS) configurations; and a processor configured to monitor for an indication of whether a first SPS transmission is to be transmitted in a first SPS resource, the first SPS resource being associated with a first SPS configuration of the plurality of SPS configurations, the indication being specific for at least one of the first SPS resource or the first SPS configuration; and refrain from monitoring the first SPS resource based on the monitoring for the indication.
  • BS base station
  • SPS semi-persistent scheduling
  • a base station includes a transceiver configured to transmit, to a user equipment (UE) , a plurality of semi-persistent scheduling (SPS) configurations; and a processor configured to provide, to the UE, an indication of whether a first SPS transmission is to be transmitted in a first SPS resource, the first SPS resource being associated with a first SPS configuration of the plurality of SPS configurations, the indication being specific for at least one of the first SPS resource or the first SPS configuration; and refrain from transmitting the first SPS transmission in the first SPS resource based on the indication.
  • SPS semi-persistent scheduling
  • a non-transitory computer-readable medium having program code recorded thereon includes code for causing a user equipment (UE) to receive, from a base station (BS) , a plurality of semi-persistent scheduling (SPS) configurations; code for causing the UE to monitor for an indication of whether a first SPS transmission is to be transmitted in a first SPS resource, the first SPS resource being associated with a first SPS configuration of the plurality of SPS configurations, the indication being specific for at least one of the first SPS resource or the first SPS configuration; and code for causing the UE to refrain from monitoring the first SPS resource based on the monitoring for the indication.
  • UE user equipment
  • BS base station
  • SPS semi-persistent scheduling
  • a non-transitory computer-readable medium having program code recorded thereon includes code for causing a base station (BS) to transmit, to a user equipment (UE) , a plurality of semi-persistent scheduling (SPS) configurations; code for causing the BS to provide, to the UE, an indication of whether a first SPS transmission is to be transmitted in a first SPS resource, the first SPS resource being associated with a first SPS configuration of the plurality of SPS configurations, the indication being specific for at least one of the first SPS resource or the first SPS configuration; and code for causing the BS to refrain from transmitting the first SPS transmission in the first SPS resource based on the indication.
  • BS base station
  • UE user equipment
  • SPS semi-persistent scheduling
  • a user equipment includes means for receiving, from a base station (BS) , a plurality of semi-persistent scheduling (SPS) configurations; means for monitoring for an indication of whether a first SPS transmission is to be transmitted in a first SPS resource, the first SPS resource being associated with a first SPS configuration of the plurality of SPS configurations, the indication being specific for at least one of the first SPS resource or the first SPS configuration; and means for refraining from monitoring the first SPS resource based on the monitoring for the indication.
  • SPS semi-persistent scheduling
  • a base station includes means for transmitting, to a user equipment (UE) , a plurality of semi-persistent scheduling (SPS) configurations; means for providing, to the UE, an indication of whether a first SPS transmission is to be transmitted in a first SPS resource, the first SPS resource being associated with a first SPS configuration of the plurality of SPS configurations, the indication being specific for at least one of the first SPS resource or the first SPS configuration; and means for refraining from transmitting the first SPS transmission in the first SPS resource based on the indication.
  • SPS semi-persistent scheduling
  • FIG. 1 illustrates a wireless communication network according to some aspects of the present disclosure.
  • FIG. 2 illustrates a radio frame structure according to some aspects of the present disclosure.
  • FIG. 3 illustrates a semi-persistent scheduling (SPS) -based communication scenario according to some aspects of the present disclosure.
  • SPS semi-persistent scheduling
  • FIG. 4 illustrates a scheduling scenario for a traffic pattern using SPS according to some aspects of the present disclosure.
  • FIG. 5A illustrates an SPS transmission indication scheme according to some aspects of the present disclosure.
  • FIG. 5B illustrates an SPS transmission indication scheme according to some aspects of the present disclosure.
  • FIG. 6 illustrates an SPS transmission indication scheme according to some aspects of the present disclosure.
  • FIG. 7 illustrates an SPS transmission indication scheme according to some aspects of the present disclosure.
  • FIG. 8 illustrates an SPS transmission indication scheme according to some aspects of the present disclosure.
  • FIG. 9 is a flow diagram of an SPS transmission indication method according to some aspects of the present disclosure.
  • FIG. 10 is a flow diagram of an SPS transmission indication method according to some aspects of the present disclosure.
  • FIG. 11 is a flow diagram of an SPS transmission indication method according to some aspects of the present disclosure.
  • FIG. 12 is a flow diagram of an SPS transmission indication method according to some aspects of the present disclosure.
  • FIG. 13 illustrates an SPS transmission indication scheme according to some aspects of the present disclosure.
  • FIG. 14 illustrates an SPS transmission indication scheme according to some aspects of the present disclosure.
  • FIG. 15 is a sequence diagram illustrating a communication method according to some aspects of the present disclosure.
  • FIG. 16 illustrates a block diagram of a user equipment (UE) according to some aspects of the present disclosure.
  • FIG. 17 illustrates a block diagram of a base station (BS) according to some aspects of the present disclosure.
  • FIG. 18 is a flow diagram of a communication method according to some aspects of the present disclosure.
  • FIG. 19 is a flow diagram of a communication method according to some aspects of the present disclosure.
  • wireless communications systems also referred to as wireless communications networks.
  • the techniques and apparatus may be used for wireless communication networks such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single-carrier FDMA (SC-FDMA) networks, LTE networks, Global System for Mobile Communications (GSM) networks, 5 th Generation (5G) or new radio (NR) networks, as well as other communications networks.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal FDMA
  • SC-FDMA single-carrier FDMA
  • LTE Long Term Evolution
  • GSM Global System for Mobile Communications
  • 5G 5 th Generation
  • NR new radio
  • An OFDMA network may implement a radio technology such as evolved UTRA (E-UTRA) , Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM and the like.
  • E-UTRA evolved UTRA
  • IEEE Institute of Electrical and Electronics Engineers
  • GSM Global System for Mobile communications
  • LTE long term evolution
  • UTRA, E-UTRA, GSM, UMTS and LTE are described in documents provided from an organization named “3rd Generation Partnership Project” (3GPP)
  • cdma2000 is described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • 3GPP 3rd Generation Partnership Project
  • 3GPP long term evolution LTE
  • LTE long term evolution
  • the 3GPP may define specifications for the next generation of mobile networks, mobile systems, and mobile devices.
  • the present disclosure is concerned with the evolution of wireless technologies from LTE, 4G, 5G, NR, and beyond with shared access to wireless spectrum between networks using a collection of new and different radio access technologies or radio air interfaces.
  • 5G networks contemplate diverse deployments, diverse spectrum, and diverse services and devices that may be implemented using an OFDM-based unified, air interface.
  • further enhancements to LTE and LTE-A are considered in addition to development of the new radio technology for 5G NR networks.
  • the 5G NR will be capable of scaling to provide coverage (1) to a massive Internet of things (IoTs) with a ULtra-high density (e.g., ⁇ 1M nodes/km 2 ) , ultra-low complexity (e.g., ⁇ 10s of bits/sec) , ultra-low energy (e.g., ⁇ 10+ years of battery life) , and deep coverage with the capability to reach challenging locations; (2) including mission-critical control with strong security to safeguard sensitive personal, financial, or classified information, ultra-high reliability (e.g., ⁇ 99.9999%reliability) , ultra-low latency (e.g., ⁇ 1 ms) , and users with wide ranges of mobility or lack thereof; and (3) with enhanced mobile broadband including extreme high capacity (e.g., ⁇ 10 Tbps/km 2 ) , extreme data rates (e.g., multi-Gbps rate, 100+ Mbps user experienced rates) , and deep awareness with advanced discovery and optimizations.
  • IoTs Internet of things
  • the 5G NR may be implemented to use optimized OFDM-based waveforms with scalable numerology and transmission time interval (TTI) ; having a common, flexible framework to efficiently multiplex services and features with a dynamic, low-latency time division duplex (TDD) /frequency division duplex (FDD) design; and with advanced wireless technologies, such as massive multiple input, multiple output (MIMO) , robust millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility.
  • TTI transmission time interval
  • MIMO massive multiple input, multiple output
  • mmWave millimeter wave
  • Scalability of the numerology in 5G NR with scaling of subcarrier spacing, may efficiently address operating diverse services across diverse spectrum and diverse deployments.
  • subcarrier spacing may occur with 15 kHz, for example over 5, 10, 20 MHz, and the like bandwidth (BW) .
  • BW bandwidth
  • subcarrier spacing may occur with 30 kHz over 80/100 MHz BW.
  • the subcarrier spacing may occur with 60 kHz over a 160 MHz BW.
  • subcarrier spacing may occur with 120 kHz over a 500 MHz BW.
  • the scalable numerology of the 5G NR facilitates scalable TTI for diverse latency and quality of service (QoS) requirements. For example, shorter TTI may be used for low latency and high reliability, while longer TTI may be used for higher spectral efficiency.
  • QoS quality of service
  • 5G NR also contemplates a self-contained integrated subframe design with UL/downlink scheduling information, data, and acknowledgement in the same subframe.
  • the self-contained integrated subframe supports communications in unlicensed or contention-based shared spectrum, adaptive UL/downlink that may be flexibly configured on a per-cell basis to dynamically switch between UL and downlink to meet the current traffic needs.
  • an aspect disclosed herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways.
  • an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein.
  • such an apparatus may be implemented or such a method may be practiced using other structure, functionality, or structure and functionality in addition to or other than one or more of the aspects set forth herein.
  • a method may be implemented as part of a system, device, apparatus, and/or as instructions stored on a computer readable medium for execution on a processor or computer.
  • an aspect may comprise at least one element of a claim.
  • SPS Semi-persistent scheduling
  • DL downlink
  • UL uplink
  • BS base station
  • UE use equipment
  • CS-RNTI schedule-radio network temporary identifier
  • a periodicity for an SPS-based schedule e.g., an SPS configuration
  • the UE may monitor for an UL or DL allocation using the CS-RNTI.
  • the BS may activate the SPS configuration by transmitting a physical downlink control channel (PDCCH) downlink control information (DCI) message with a cyclic redundancy check (CRC) scrambled with the CS-RNTI.
  • the PDCCH DCI message may indicate a resource allocation (e.g., time-frequency resource) and transmission parameters (e.g., modulation coding scheme (MCS) ) .
  • MCS modulation coding scheme
  • the UE may transmit an UL data packet in any of the SPS resources.
  • the UE may monitor for a DL packet in each of the SPS resources.
  • a network may control a large number of devices (e.g., smart meters, smart sensors, machines, motors, etc. ) .
  • the network may control the operations of the devices and may frequently transmit control commands to the devices.
  • the DL traffic e.g., physical downlink shared channel (PDSCH) transmissions
  • PDSCH physical downlink shared channel
  • the packet size may be relatively small (e.g., a few bytes to tens of bytes per packet) .
  • PDCCH physical downlink shared channel
  • the traffic pattern of IoT devices and/or IIoT devices may have a periodicity (e.g., about 8.33 milliseconds (ms) or other non-integer multiple of 1 ms) the does not match or align to the available choices of SPS periods.
  • available SPS periods may include 10 ms, 20 ms, 32, ms, 40 ms, 64 ms, 80 ms, 128 ms, 160 ms, 320 ms, or 640 ms.
  • One way to resolve the misalignment between the periodicity of a traffic pattern (e.g.., time-sensitive communication (TSC) traffic) and available SPS periodicities is to over-provision SPS resources.
  • the BS may configure a UE with multiple SPS configurations (SPS-based schedules) , for example, at a time offset (e.g., one or more symbols) from each other, to provide a periodicity at a finer time granularity in order to cater for the TSC traffic periodicity.
  • the TSC traffic may use an SPS resource from one of the SPS configurations at one time and may use an SPS resource from a different one of the SPS configurations at another time based on a periodicity of the TSC traffic. In other words, the TSC traffic may use only one of the SPS configuration at a given time period.
  • the resources allocated for the other SPS configurations or schedules are unused, and thus may impact resource utilization efficiency.
  • hybrid automatic repeat request may be applied to the TSC traffic (PDSCH transmission) , for example, to improve reliability.
  • the UE may provide a HARQ acknowledgement/negative-acknowledgement (ACK/NACK) feedback for each SPS resource.
  • ACK/NACK HARQ acknowledgement/negative-acknowledgement
  • the UE may perform decoding in each SPS resource and transmit a HARQ ACK/NACK feedback for each SPS resource. Since the UE may not be aware when the BS may skip or cancel a transmission in an SPS resource due to the over-provisioning, the UE may unnecessarily perform packet decoding and transmit HARQ NACKs for SPS resources where no SPS transmission is transmitted by the BS.
  • the unnecessary packet decoding can impact power saving and resource utilization at the UE, and the redundant HARQ feedback transmissions can impact radio resource or bandwidth utilization.
  • a BS may utilize a slot format indicator (SFI) to cancel a DL SPS resource by configuring certain OFDM symbol (s) in a slot as UL symbol (s) for UL transmissions or flexible symbol (s) for UL or DL transmissions.
  • SFI slot format indicator
  • the SFI is generally applied to a period including multiple slots (e.g., over one or more radio frames) .
  • a DL SPS resource (monitored by the UE) that occupy the same symbol location (s) in another slot (within the SFI period) is also cancelled. Accordingly, there is a need to provide SPS-PDSCH transmission cancellation indication.
  • a BS may configure a UE with a plurality of SPS configurations.
  • the BS may provide, to the UE, an indication of whether a first SPS transmission (a PDSCH data packet) is to be transmitted in a first resource associated with a first SPS configuration of the plurality of SPS configurations.
  • the indication may be specific to the first SPS transmission in the first SPS resource or the first SPS configuration associated with the first SPS resource.
  • the BS may transmit the indication prior to the first SPS resource.
  • the BS may not provide any indication for the first SPS resource if the BS is to transmit in the first SPS resource.
  • the BS may provide the UE with the indication (e.g., an SPS transmission cancellation indication) . Accordingly, the UE may monitor for the indication and may refrain from monitoring and/or performing packet decoding in the first SPS resource upon receiving the indication.
  • the BS may not provide any indication for the first SPS resource if the BS is to skip a transmission in the first SPS resource.
  • the BS may provide the UE with the indication (e.g., an SPS transmission validation indication) . Accordingly, the UE may monitor for the indication and may refrain from monitoring and/or performing packet decoding in the first SPS resource when failing to receive the indication.
  • the BS may provide the indication via DCI signaling. For instance, the BS may transmit a group common-physical downlink control channel (GC-PDCCH) DCI message including the indication.
  • the GC-PDCCH DCI message may have a new DCI format 2_X, where X may be any suitable value.
  • the GC-PDCCH DCI message may include a cyclic redundancy check (CRC) scrambled with a new RNTI (e.g., an SPS transmission indication-specific RNTI) .
  • CRC cyclic redundancy check
  • each UE may be aware of the DCI block location and length (within the DCI message) that is assigned to the UE. Accordingly, the UE may monitor for the indication in a PDCCH according to the SPS transmission indication-specific RNTI and the assigned DCI block location and length.
  • the BS may configure the UE with an SPS transmission indication monitoring window during which the UE may monitor for the indication.
  • the SPS transmission indication monitoring window may be located prior to the first SPS resource and ends before a starting symbol the first SPS resource.
  • the SPS transmission indication monitoring window may have a duration shorter than an SPS periodic of the first SPS configuration.
  • the transmission indication monitoring window may be in addition to PDCCH monitoring occasions. For instance, the UE may monitor for the indication during PDCCH monitoring occasions within the SPS transmission indication monitoring window.
  • the BS may provide the indication by transmitting a DCI message including a bitmap with N bits, where each bit may indicate a cancellation or validation for one of the SPS configurations.
  • the N bits may be used to cancel/validate SPS resources the N SPS configurations with the shortest periods among the plurality of SPS configurations.
  • the bitmap may include a bit for indicating a cancellation or validation for each SPS configuration.
  • the BS may provide the indication by transmitting a DCI message including a bit indicating a cancellation or validation for a next SPS resource (the first SPS resource) after the transmission of the DCI message.
  • the BS may provide the indication by transmitting a DCI message including a field indicating cancellation (s) or validation (s) for next K number of SPS resource (s) (including the first SPS resource) after the transmission of the DCI message.
  • the BS may provide the indication by transmitting a DCI message including a resource indicator value (RIV) structure indicating a beginning slot where an SPS resource is cancelled/validated and a number of slots where SPS resource (s) are cancelled/validated (where the first SPS resource is within the number of slots indicated by the RIV) .
  • the BS may provide the indication by transmitting a DCI message including a bitmap indicating whether each SPS resource in the next K SPS resources (including the first SPS resource) after the DCI message is cancelled or validated. Accordingly, the UE may monitor for the DCI message and determine whether an SPS transmission is cancelled for the first SPS resource.
  • the BS may allocate a common resource for multiple UEs for indicating whether an SPS transmission (DL data packet) is to be transmitted in an SPS resource.
  • the BS may provide the indication by utilizing a combination of reference signal (e.g., a demodulation reference signal (DMRS) ) transmission in the SPS resource and/or a first waveform sequence (a physical waveform signal) in the common resource. For instance, if the BS is to transmit an SPS data packet in the first SPS resource, the BS may transmit a reference signal (DMRS) along with the SPS data packet in the first SPS resource to facilitate decoding of the SPS data packet at the UE.
  • DMRS demodulation reference signal
  • the UE can determine whether an SPS data packet is transmitted in the first SPS resource based on a reference signal detection in the first SPS resource.
  • the reference signal detection may be not be reliable when the number of RBs in the SPS resource is small since the reference signal may generally occupy one frequency subcarrier or a few frequency subcarriers (less than all frequency subcarriers) per RB.
  • the BS may transmit the first waveform sequence (e.g., occupying a greater number of frequency subcarriers per RB than the reference signal) in the common resource to indicate an SPS transmission validation for the first SPS resource.
  • the BS may not transmit the first waveform sequence in the common resource since the reference signal in the first SPS resource can function as an SPS transmission validation for the first SPS resource. Accordingly, the UE may perform a reference signal detection in the first SPS resource or a first waveform sequence detection in the common resource based on a number of RBs in the first SPS resource. In some other aspects, the BS may transmit the first waveform sequence in the common resource to indicate an SPS transmission cancellation. Accordingly, the UE may perform the first waveform sequence detection in the common resource to determine if an SPS transmission is cancelled for the first SPS resource.
  • the UE may perform the first waveform sequence detection upon failing to detect the reference signal in the first SPS resource.
  • the BS may configure N waveform sequences per UE, each for a different SPS configuration at the UE.
  • the BS may assign one waveform sequence to each SPS configuration.
  • the BS may utilize the N waveform sequences to indicate cancellation or validation for the N SPS configurations with the shortest SPS periods among the plurality of SPS configurations.
  • the BS apply a combination of time-division multiplexing (TDM) , frequency-division multiplexing (FDM) , and/or code-division multiplexing (CDM) to provide each UE with orthogonal resources for communicating the first waveform sequence in the common resource.
  • TDM time-division multiplexing
  • FDM frequency-division multiplexing
  • CDM code-division multiplexing
  • the BS may apply frequency-hopping in combination with TDM, FDM, and/or CDM for waveform sequence transmissions to the multiple UEs in the common resource to gain frequency diversity.
  • providing SPS transmission-specific cancellation indication can allow the BS to cancel specific unused SPS resource (e.g., due to over-provisioning) and allow the UE to avoid monitoring and/or performing packet decoding the in unused SPS resource, and thus ma allow for power saving at the UE.
  • indicating the unused SPS resource can avoid having the UE to transmit HARQ ACK/NACK for the unused SPS resource, and thus may improve bandwidth utilization.
  • FIG. 1 illustrates a wireless communication network 100 according to some aspects of the present disclosure.
  • the network 100 may be a 5G network.
  • the network 100 includes a number of base stations (BSs) 105 (individually labeled as 105a, 105b, 105c, 105d, 105e, and 105f) and other network entities.
  • a BS 105 may be a station that communicates with UEs 115 and may also be referred to as an evolved node B (eNB) , a next generation eNB (gNB) , an access point, and the like.
  • eNB evolved node B
  • gNB next generation eNB
  • Each BS 105 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to this particular geographic coverage area of a BS 105 and/or a BS subsystem serving the coverage area, depending on the context in which the term is used.
  • a BS 105 may provide communication coverage for a macro cell or a small cell, such as a pico cell or a femto cell, and/or other types of cell.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a pico cell, would generally cover a relatively smaller geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a femto cell, would also generally cover a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide restricted access by UEs having an association with the femto cell (e.g., UEs in a closed subscriber group (CSG) , UEs for users in the home, and the like) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a small cell may be referred to as a small cell BS, a pico BS, a femto BS or a home BS. In the example shown in FIG.
  • the BSs 105d and 105e may be regular macro BSs, while the BSs 105a-105c may be macro BSs enabled with one of three dimension (3D) , full dimension (FD) , or massive MIMO.
  • the BSs 105a-105c may take advantage of their higher dimension MIMO capabilities to exploit 3D beamforming in both elevation and azimuth beamforming to increase coverage and capacity.
  • the BS 105f may be a small cell BS which may be a home node or portable access point.
  • a BS 105 may support one or multiple (e.g., two, three, four, and the like) cells.
  • the network 100 may support synchronous or asynchronous operation.
  • the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time.
  • the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time.
  • the UEs 115 are dispersed throughout the wireless network 100, and each UE 115 may be stationary or mobile.
  • a UE 115 may also be referred to as a terminal, a mobile station, a subscriber unit, a station, or the like.
  • a UE 115 may be a cellular phone, a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless phone, a wireless local loop (WLL) station, or the like.
  • PDA personal digital assistant
  • WLL wireless local loop
  • a UE 115 may be a device that includes a Universal Integrated Circuit Card (UICC) .
  • a UE may be a device that does not include a UICC.
  • UICC Universal Integrated Circuit Card
  • the UEs 115 that do not include UICCs may also be referred to as IoT devices or internet of everything (IoE) devices.
  • the UEs 115a-115d are examples of mobile smart phone-type devices accessing network 100.
  • a UE 115 may also be a machine specifically configured for connected communication, including machine type communication (MTC) , enhanced MTC (eMTC) , narrowband IoT (NB-IoT) and the like.
  • MTC machine type communication
  • eMTC enhanced MTC
  • NB-IoT narrowband IoT
  • the UEs 115e-115h are examples of various machines configured for communication that access the network 100.
  • the UEs 115i-115k are examples of vehicles equipped with wireless communication devices configured for communication that access the network 100.
  • a UE 115 may be able to communicate with any type of the BSs, whether macro BS, small cell, or the like.
  • a lightning bolt e.g., communication links indicates wireless transmissions between a UE 115 and a serving BS 105, which is a BS designated to serve the UE 115 on the downlink (DL) and/or uplink (UL) , desired transmission between BSs 105, backhaul transmissions between BSs, or sidelink transmissions between UEs 115.
  • the BSs 105a-105c may serve the UEs 115a and 115b using 3D beamforming and coordinated spatial techniques, such as coordinated multipoint (CoMP) or multi-connectivity.
  • the macro BS 105d may perform backhaul communications with the BSs 105a-105c, as well as small cell, the BS 105f.
  • the macro BS 105d may also transmits multicast services which are subscribed to and received by the UEs 115c and 115d.
  • Such multicast services may include mobile television or stream video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber alerts or gray alerts.
  • the BSs 105 may also communicate with a core network.
  • the core network may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • IP Internet Protocol
  • At least some of the BSs 105 (e.g., which may be an example of a gNB or an access node controller (ANC) ) may interface with the core network through backhaul links (e.g., NG-C, NG-U, etc. ) and may perform radio configuration and scheduling for communication with the UEs 115.
  • the BSs 105 may communicate, either directly or indirectly (e.g., through core network) , with each other over backhaul links (e.g., X1, X2, etc. ) , which may be wired or wireless communication links.
  • the network 100 may also support mission critical communications with ultra-reliable and redundant links for mission critical devices, such as the UE 115e, which may be a drone. Redundant communication links with the UE 115e may include links from the macro BSs 105d and 105e, as well as links from the small cell BS 105f.
  • UE 115f e.g., a thermometer
  • UE 115g e.g., smart meter
  • UE 115h e.g., wearable device
  • the network 100 may also provide additional network efficiency through dynamic, low-latency TDD/FDD communications, such asV2V, V2X, C-V2X communications between a UE 115i, 115j, or 115k and other UEs 115, and/or vehicle-to-infrastructure (V2I) communications between a UE 115i, 115j, or 115k and a BS 105.
  • V2V dynamic, low-latency TDD/FDD communications
  • V2X V2X
  • C-V2X C-V2X communications between a UE 115i, 115j, or 115k and other UEs 115
  • V2I vehicle-to-infrastructure
  • the network 100 utilizes OFDM-based waveforms for communications.
  • An OFDM-based system may partition the system BW into multiple (K) orthogonal subcarriers, which are also commonly referred to as subcarriers, tones, bins, or the like. Each subcarrier may be modulated with data.
  • the subcarrier spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may be dependent on the system BW.
  • the system BW may also be partitioned into subbands. In other instances, the subcarrier spacing and/or the duration of TTIs may be scalable.
  • the BSs 105 can assign or schedule transmission resources (e.g., in the form of time-frequency resource blocks (RB) ) for downlink (DL) and uplink (UL) transmissions in the network 100.
  • DL refers to the transmission direction from a BS 105 to a UE 115
  • UL refers to the transmission direction from a UE 115 to a BS 105.
  • the communication can be in the form of radio frames.
  • a radio frame may be divided into a plurality of subframes or slots, for example, about 10. Each slot may be further divided into mini-slots. In a FDD mode, simultaneous UL and DL transmissions may occur in different frequency bands.
  • each subframe includes a UL subframe in a UL frequency band and a DL subframe in a DL frequency band.
  • UL and DL transmissions occur at different time periods using the same frequency band.
  • a subset of the subframes (e.g., DL subframes) in a radio frame may be used for DL transmissions and another subset of the subframes (e.g., UL subframes) in the radio frame may be used for UL transmissions.
  • each DL or UL subframe may have pre-defined regions for transmissions of reference signals, control information, and data.
  • Reference signals are predetermined signals that facilitate the communications between the BSs 105 and the UEs 115.
  • a reference signal can have a particular pilot pattern or structure, where pilot tones may span across an operational BW or frequency band, each positioned at a pre-defined time and a pre-defined frequency.
  • a BS 105 may transmit cell specific reference signals (CRSs) and/or channel state information –reference signals (CSI-RSs) to enable a UE 115 to estimate a DL channel.
  • CRSs cell specific reference signals
  • CSI-RSs channel state information –reference signals
  • a UE 115 may transmit sounding reference signals (SRSs) to enable a BS 105 to estimate a UL channel.
  • Control information may include resource assignments and protocol controls.
  • Data may include protocol data and/or operational data.
  • the BSs 105 and the UEs 115 may communicate using self-contained subframes.
  • a self-contained subframe may include a portion for DL communication and a portion for UL communication.
  • a self-contained subframe can be DL-centric or UL-centric.
  • a DL-centric subframe may include a longer duration for DL communication than for UL communication.
  • a UL-centric subframe may include a longer duration for UL communication than for UL communication.
  • the network 100 may be an NR network deployed over a licensed spectrum.
  • the BSs 105 can transmit synchronization signals (e.g., including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) ) in the network 100 to facilitate synchronization.
  • the BSs 105 can broadcast system information associated with the network 100 (e.g., including a master information block (MIB) , remaining system information (RMSI) , and other system information (OSI) ) to facilitate initial network access.
  • MIB master information block
  • RMSI remaining system information
  • OSI system information
  • the BSs 105 may broadcast the PSS, the SSS, and/or the MIB in the form of synchronization signal block (SSBs) over a physical broadcast channel (PBCH) and may broadcast the RMSI and/or the OSI over a physical downlink shared channel (PDSCH) .
  • PBCH physical broadcast channel
  • PDSCH physical downlink shared channel
  • a UE 115 attempting to access the network 100 may perform an initial cell search by detecting a PSS from a BS 105.
  • the PSS may enable synchronization of period timing and may indicate a physical layer identity value.
  • the UE 115 may then receive a SSS.
  • the SSS may enable radio frame synchronization, and may provide a cell identity value, which may be combined with the physical layer identity value to identify the cell.
  • the PSS and the SSS may be located in a central portion of a carrier or any suitable frequencies within the carrier.
  • the UE 115 may receive a MIB.
  • the MIB may include system information for initial network access and scheduling information for RMSI and/or OSI.
  • the UE 115 may receive RMSI and/or OSI.
  • the RMSI and/or OSI may include radio resource control (RRC) information related to random access channel (RACH) procedures, paging, control resource set (CORESET) for physical downlink control channel (PDCCH) monitoring, physical UL control channel (PUCCH) , physical UL shared channel (PUSCH) , power control, and SRS.
  • RRC radio resource control
  • the UE 115 can perform a random access procedure to establish a connection with the BS 105.
  • the random access procedure may be a four-step random access procedure.
  • the UE 115 may transmit a random access preamble and the BS 105 may respond with a random access response.
  • the random access response (RAR) may include a detected random access preamble identifier (ID) corresponding to the random access preamble, timing advance (TA) information, a UL grant, a temporary cell-radio network temporary identifier (C-RNTI) , and/or a backoff indicator.
  • ID detected random access preamble identifier
  • TA timing advance
  • C-RNTI temporary cell-radio network temporary identifier
  • the UE 115 may transmit a connection request to the BS 105 and the BS 105 may respond with a connection response.
  • the connection response may indicate a contention resolution.
  • the random access preamble, the RAR, the connection request, and the connection response can be referred to as message 1 (MSG1) , message 2 (MSG2) , message 3 (MSG3) , and message 4 (MSG4) , respectively.
  • the random access procedure may be a two-step random access procedure, where the UE 115 may transmit a random access preamble and a connection request in a single transmission and the BS 105 may respond by transmitting a random access response and a connection response in a single transmission.
  • the UE 115 and the BS 105 can enter a normal operation stage, where operational data may be exchanged.
  • the BS 105 may schedule the UE 115 for UL and/or DL communications.
  • the BS 105 may transmit UL and/or DL scheduling grants to the UE 115 via a PDCCH.
  • the scheduling grants may be transmitted in the form of DL control information (DCI) .
  • the BS 105 may transmit a DL communication signal (e.g., carrying data) to the UE 115 via a PDSCH according to a DL scheduling grant.
  • the UE 115 may transmit a UL communication signal to the BS 105 via a PUSCH and/or PUCCH according to a UL scheduling grant.
  • the BS 105 may communicate with a UE 115 using HARQ techniques to improve communication reliability, for example, to provide a URLLC service.
  • the BS 105 may schedule a UE 115 for a PDSCH communication by transmitting a DL grant in a PDCCH.
  • the BS 105 may transmit a DL data packet to the UE 115 according to the schedule in the PDSCH.
  • the DL data packet may be transmitted in the form of a transport block (TB) . If the UE 115 receives the DL data packet successfully, the UE 115 may transmit a HARQ ACK to the BS 105.
  • TB transport block
  • the UE 115 may transmit a HARQ NACK to the BS 105.
  • the BS 105 may retransmit the DL data packet to the UE 115.
  • the retransmission may include the same coded version of DL data as the initial transmission.
  • the retransmission may include a different coded version of the DL data than the initial transmission.
  • the UE 115 may apply soft-combining to combine the encoded data received from the initial transmission and the retransmission for decoding.
  • the BS 105 and the UE 115 may also apply HARQ for UL communications using substantially similar mechanisms as the DL HARQ.
  • the network 100 may operate over a system BW or a component carrier (CC) BW.
  • the network 100 may partition the system BW into multiple BWPs (e.g., portions) .
  • a BS 105 may dynamically assign a UE 115 to operate over a certain BWP (e.g., a certain portion of the system BW) .
  • the assigned BWP may be referred to as the active BWP.
  • the UE 115 may monitor the active BWP for signaling information from the BS 105.
  • the BS 105 may schedule the UE 115 for UL or DL communications in the active BWP.
  • a BS 105 may assign a pair of BWPs within the CC to a UE 115 for UL and DL communications.
  • the BWP pair may include one BWP for UL communications and one BWP for DL communications.
  • the networks 100 may operate over a licensed band.
  • a BS 105 may configure a UE 115 with configured grant resources for autonomous UL data transmission.
  • the configured grant resources may be repeated at a certain time interval.
  • the UE 115 may use the configured grant resources for UL HARQ data transmission without being scheduled dynamically by the BS 105.
  • Each configured grant resource may include a set of consecutive transmission slots or time periods.
  • the BS 105 may configure the UE with a set of redundancy version number (RVNs) .
  • RVNs redundancy version number
  • the UE 115 may determine an order for mapping the configured RVNs to the set of slots or transmission periods.
  • the UE 115 may transmit one or more redundancy versions of a TB in consecutive slots or time periods within a configured grant resource.
  • the UE 115 may also prioritize HARQ processes and/or TBs for transmissions in the configured grant resources.
  • a BS 105 may preconfigure a UE 115 with an CS-RNTI and a periodicity for an SPS-based schedule (e.g., an SPS configuration) .
  • the UE 115 may monitor for an UL or DL allocation using the CS-RNTI.
  • the BS 105 may activate the SPS configuration by transmitting a PDCCH DCI message with a CRC scrambled with the CS-RNTI.
  • the PDCCH DCI message may indicate a resource allocation and transmission parameters, such as an MCS.
  • the resource allocation is repeated according to the preconfigured periodicity. Accordingly, the UE 115 may receive the activation including the resource allocation and transmission parameters based on the CS-RNTI.
  • the UE 115 may continue to utilize the resource allocation according to the periodicity. For instance, if the SPS configuration is for UL communications, the UE may transmit an UL data packet in any of the SPS resources. Alternatively, if the SPS configuration is of DL communications, the UE may monitor for a DL packet in each of the SPS resources.
  • the network 100 may support TSC traffic, such as traffic from IoT and/or IIoT applications, where the network 100 may communicate with IoT devices or IIoT devices (the UEs 115) frequently. For instance, the network 100 may transmit commands to control the operations of the UEs 115.
  • the DL communications may be frequent and the packet size may be small (e.g., a few bytes to tens of bytes) . Due to the frequency of the TSC traffic and the small packet size, it may not be suitable for dynamic scheduling.
  • the BS 105 may utilize SPS-based schedules for DL communications with the UEs 115.
  • the TSC traffic may have a periodicity that is misaligned with typical SPS periodicities, which may be in units of milliseconds.
  • the BS 105 can configure multiple SPS configurations or SPS-based schedules to over-provision SPS resources as will be discussed more fully below in FIG. 4.
  • HARQ techniques can be applied to the TSC traffic to improve communication reliability as discussed above.
  • the BS 105 may indicate to the UE 115 a cancellation of an SPS transmission so that the UE 115 may avoid performing decoding and/or transmitting an HARQ ACK/NACK feedback for an unused SPS resource (e.g., due to the overprovisioning) .
  • the BS 105 may transmit a plurality of SPS configurations to the UE 115.
  • the plurality of SPS configurations may indicate a plurality of SPS resources.
  • the BS 105 may provide an indication to the UE 115 indicating whether a first SPS transmission is to be transmitted in a first SPS resource of the plurality of SPS resources.
  • the indication can be specific to the first SPS resource or specific to an SPS configuration (e.g., a first SPS configuration of the plurality of SPS configurations) associated with the first SPS resource.
  • the BS 105 may indicate an SPS transmission cancellation by transmitting an SPS transmission cancellation indication.
  • the BS 105 may indicate an SPS transmission cancellation by not transmitting an SPS transmission validation indication. Accordingly, the UE 115 may monitor for an SPS transmission cancellation indication or an SPS transmission validation indication and may determine that an SPS transmission is cancelled for the first SPS resource based on receiving an SPS transmission cancellation indication or failing to receive an SPS transmission validation indication.
  • the UE 115 may skip monitoring and perform packet decoding in the first SPS resource and/or transmitting an HARQ ACK/NACK feedback for the first SPS resource.
  • the BS 105 may provide the SPS transmission cancellation or validation indications in a variety of ways, for example, via PDCCH DCI messages and/or waveform sequences. Mechanisms for indicating SPS-PDSCH transmission specific cancellations are discussed more in greater detail herein.
  • FIG. 2 illustrates a radio frame structure 200 according to some aspects of the present disclosure.
  • the radio frame structure 200 may be employed by BSs such as the BSs 105 and UEs such as the UEs 115 in a network such as the network 100 for communications.
  • the x-axes represent time in some arbitrary units and the y-axes represent frequency in some arbitrary units.
  • the transmission frame structure 200 includes a radio frame 201.
  • the duration of the radio frame 201 may vary depending on the aspects. In an example, the radio frame 201 may have a duration of about ten milliseconds.
  • the radio frame 201 includes M number of slots 202, where M may be any suitable positive integer. In an example, M may be about 10.
  • Each slot 202 includes a number of subcarriers 204 in frequency and a number of symbols 206 in time.
  • the number of subcarriers 204 and/or the number of symbols 206 in a slot 202 may vary depending on the aspects, for example, based on the channel bandwidth, the subcarrier spacing (SCS) , and/or the CP mode.
  • One subcarrier 204 in frequency and one symbol 206 in time forms one resource element (RE) 212 for transmission.
  • a resource block (RB) 210 is formed from a number of consecutive subcarriers 204 in frequency and one or more consecutive symbols 206 in time. In NR, a RB 210 is defined as twelve consecutive subcarriers 204 in a frequency domain.
  • a BS may schedule a UE (e.g., UE 115 in FIG. 1) for UL and/or DL communications at a time-granularity of slots 202 or mini-slots 208.
  • Each slot 202 may be time-partitioned into K number of mini-slots 208.
  • Each mini-slot 208 may include one or more symbols 206.
  • the mini-slots 208 in a slot 202 may have variable lengths. For example, when a slot 202 includes N number of symbols 206, a mini-slot 208 may have a length between one symbol 206 and (N-1) symbols 206.
  • a mini-slot 208 may have a length of about two symbols 206, about four symbols 206, or about seven symbols 206.
  • the BS may schedule UE at a frequency-granularity of a resource block (RB) 210 (e.g., including about 12 subcarriers 204) .
  • RB resource block
  • FIG. 3 illustrates an SPS-based communication scenario 300 according to some aspects of the present disclosure.
  • the x-axis represents time in some arbitrary units.
  • the scenario 300 can include a frame structure 306 that may be employed by a BS (such as BS 105) for the transmission of data to a UE (such as UE 115) in a network (such as the network 100) using SPS resources.
  • the frame structure 306 may include multiple slots 202.
  • a BS 105 may configure a UE 115 with an SPS configuration 310, for example, via RRC signaling.
  • the SPS configuration 310 may indicate a periodicity (e.g., shown by the SPS period 304) for an SPS-base schedule and a CS-RNTI.
  • the SPS configuration 310 may also indicate a HARQ ID identifying a HARQ process associated with the SPS configuration.
  • the UE 115 may monitor for a PDCCH DCI message based on the CS-RNTI.
  • the BS 105 may have configured the UE 115 with a PDCCH monitoring occasions, and the UE 115 may perform the PDCCH DCI monitoring according to the PDCCH monitoring occasions.
  • the BS 105 may transmit an SPS activation 320, for example, via a PDCCH DCI message during one of the PDCCH monitoring occasions.
  • the BS 105 may include in the DCI message a CRC scrambled with the CS-RNTI.
  • the SPS activation 320 may indicate a resource allocation (e.g., certain RB (s) 210 in certain symbol (s) 206 within a certain slot 202) .
  • the SPS activation 320 may also indicate transmission parameters (e.g., MCS) to be used for the SPS transmissions. Once activated, the resource allocation is repeated according to the periodicity configured by the SPS configuration 310. It may not be necessary for the BS 105 to transmit a PDCCH DCI scheduling grant per transmission. As such, SPS-based scheduling can reduce PDCCH overhead.
  • MCS transmission parameters
  • the SPS resources 302 associated with the configuration 310 is shown by the patterned filled boxes.
  • the SPS resources 302 are periodic repeating at every SPS period 304 (e.g., about five slots 202) .
  • the SPS resources 302 may also be referred to as SPS instances.
  • FIG. 3 illustrates the SPS configuration 310 configures an SPS schedule periodicity of five slots 202, it should be understood that in other examples an SPS schedule can have a shorter period or a longer period.
  • the SPS configuration 310 may be configured for DL communications. Accordingly, the BS 105 can transmit a data transmission 330 (e.g., PDSCH transmission) to the UE 115 in each SPS resource 302, and the UE 115 can monitor for a data transmission from the BS 105 in each of the SPS resources 302. The monitoring may include performing blind packet decoding in each SPS resource 302.
  • a data transmission 330 e.g., PDSCH transmission
  • the monitoring may include performing blind packet decoding in each SPS resource 302.
  • a BS 105 may utilize SPS-based scheduling as shown in the scenario 300 to support these applications.
  • SPS configurations may support a limited number of periodicities. For instance, an SPS-based schedule may have a periodicity of about 10 ms, 20 ms, 32, ms, 40 ms, 64 ms, 80 ms, 128 ms, 160 ms, 320 ms, or 640 ms.
  • a certain traffic pattern may not match the limited choices of SPS periods.
  • the BS 105 may over-provision for SPS resources, for example, by configuring multiple SPS configurations with short periods as shown in FIG. 4.
  • FIG. 4 illustrates a scheduling scenario 400 for a traffic pattern using SPS according to some aspects of the present disclosure.
  • the x-axis represents time in some arbitrary units.
  • the scenario 400 can include a frame structure including a plurality of slots 202 (shown as S0 to S9) that may be employed by a BS (such as BS 105) for the transmission of data to a UE (such as UE 115) in a network (such as the network 100) using SPS resources.
  • the scenario 400 may correspond to a scheduling scenario in the network 100 when the network 100 provisions for TSC traffic such as IIoT traffic.
  • a BS 105 may communicate with a UE 115 in one or more slots 202.
  • the slots 202 are shown as S0 to S9.
  • each slot 202 may have a duration of about 1 ms.
  • the BS 105 may transmit DL transmissions to the UE 115 with a traffic pattern 410 having a periodicity 406 of about 8.33 ms (shown by the pattern-filled boxes 412 with horizontal stripes) .
  • the BS 105 may configure the UE 115 with multiple SPS configurations shown as 420, 422, and 424.
  • Each of the SPS configuration 420, 422, 424 may have a set of SPS resources 402 that repeats at a period 404 of 8 ms (e.g., 8 slots 202) .
  • the SPS configurations 420, 422, and 424 can be offset from each other in time by about 1/3 (e.g., about 4-5 symbols) of a slot 202 to provision for the 8.33 ms periodicity of the traffic pattern 410.
  • the BS 105 may activate the multiple SPS configurations 420, 422, and 424 using similar activation mechanisms (via PDCCH DCI signaling with CS-RNTI) as discussed above in relation to FIG. 3.
  • the BS 105 may transmit an SPS packet using an SPS resource 402 from the SPS configuration 420 at slot 202 S0 as shown by the checkmark.
  • the BS 105 may transmit another SPS packet using an SPS resource 402 from the SPS configuration 422 at slot S8 as shown by the checkmark to satisfy the 8.33 ms periodicity of the traffic pattern 410.
  • the other SPS resources 402 e.g., at slot S0 of the SPS configurations 422 and 424, at slot S8 of the SPS configurations 420 and 424) are unused as shown by the cross symbols “X” .
  • the BS 105 over-provisions SPS resources to achieve a desired periodicity matching to the traffic pattern 410.
  • the UE 115 may not be aware which SPS resource 402 the BS 105 may skip a transmission. Thus, the UE 115 may blindly perform SPS packet decoding at each SPS resource 402, utilizing processing resources and/or power at the UE 115 unnecessarily. Additionally, when the BS 105 applies HARQ to the SPS transmissions, the UE 115 may generate a HARQ ACK/NACK feedback for each SPS resource and the transmit each HARQ ACK/NACK feedback to the BS 105.
  • the UE 115 may fail the decoding, and thus may transmit a HARQ NACK for each of those unused SPS resources 402.
  • the HARQ NACK transmissions for the unused SPS resources 402 may not provide any useful information for the BS 105 and can be wasteful of radio resources.
  • the present disclosure provides techniques for a BS to provide explicit SPS-PDSCH transmission specific cancellations to a UE and for the UE to monitor for SPS-PDSCH transmission specific cancellations so that the UE may skip the unnecessary packet decoding and/or HARQ ACK/NACK feedback transmissions for the unused over-provisioned resources.
  • a BS 105 may configure a UE 115 with a plurality of SPS configurations (e.g., the SPS configurations 420, 422, 424) to over-provision resources for a certain traffic pattern having a periodicity (e.g., that are misaligned to a set of available SPS periodicities such as 10 ms, 20 ms, 32, ms, 40 ms, 64 ms, 80 ms, 128 ms, 160 ms, 320 ms, or 640 ms) .
  • the plurality of SPS configurations may indicate a plurality of SPS resources (e.g., the SPS resources 402) .
  • the BS 105 may provide the UE 115 with an indication of whether a first SPS transmission is to be transmitted in a first SPS resource of the plurality of SPS resources.
  • the indication may be specific to the SPS transmission in the first SPS resource.
  • the indication may be an explicit SPS transmission cancellation as shown in FIG. 5A.
  • the indication may be an explicit SPS transmission validation as shown in FIG. 5B.
  • FIG. 5A illustrates an SPS transmission indication scheme 500 according to some aspects of the present disclosure.
  • the scheme 500 may be employed by a BS (such as BS 105) and a UE (such as UE 115) for DL communications in a network (such as network 100) using SPS resources.
  • the x-axis represents time in some arbitrary units.
  • a BS 105 may configure a UE 115 with multiple SPS configurations, for example, to over-provision SPS resources for serving TSC traffic to the UE 115 as discussed above in relation to FIG. 4.
  • FIG. 5A illustrates an SPS transmission indication scheme 500 according to some aspects of the present disclosure.
  • the scheme 500 may be employed by a BS (such as BS 105) and a UE (such as UE 115) for DL communications in a network (such as network 100) using SPS resources.
  • the x-axis represents time in some arbitrary units.
  • a BS 105 may configure a UE 115 with multiple
  • the scheme 500 can be applied to any suitable number of SPS configurations (e.g., about 2, 3, 4, 5 or more) over any suitable number of slots 202 (e.g., about 10, 20, 30, 32, 40, 64 or more) .
  • the BS 105 may activate the multiple SPS configurations using similar activation mechanisms (via PDCCH DCI signaling with CS-RNTI) as discussed above in relation to FIG. 3.
  • the BS 105 may transmit a DCI message 510 (in a PDCCH) indicating an SPS transmission cancellation prior to the SPS resource 502.
  • the DCI message 510 can be transmitted via a PDCCH.
  • the UE 115 may monitor for an SPS transmission cancellation for the SPS resource 502 prior to the SPS resource 502.
  • the DCI message 510 may be a group common PDCCH DCI message shared by multiple UEs (UEs 115) .
  • the DCI message 510 may have a new DCI format such as DCI format 2_X, where X may be any suitable format.
  • the new DCI format may be specific for SPS transmission indication.
  • the DCI message 510 may include a CRC scrambled by an SPS transmission indication specific-RNTI (different from a CS-RNTI) .
  • the UE 115 may monitor for the DCI message 510 based on the SPS transmission indication specific-RNTI. For instance, the UE 115 may perform blind decoding in a PDCCH based on the SPS transmission indication specific-RNTI. If the blind decoding passes, the DCI message 510 is received. If the blind decoding fails, the DCI message 510 is not received.
  • the DCI message 510 may be shared across multiple UEs (UEs 115) and each UE 115 may monitor a certain number of DCI bits within the DCI message 510.
  • the DCI message 510 may include multiple blocks of bits, each block of bits may be for a different UE.
  • the block bit length and/or the block index (identifying a block of bits in DCI message 510) may be known to the UE 115.
  • the block bit length and/or the block index may be similar some other DCI message (s) so that the UE 115 may monitor for the SPS transmission cancellation in the DCI message 510 in a similar manner as the other DCI message (s) .
  • the BS 105 may configure the UE 115 with information for identifying a block within the DCI message 510 that is assigned to the UE 115 and/or a length of the block.
  • the block assignment and/or the length assignment can be via RRC signaling.
  • the RRC may configure the DCI bit length aligned to some other DCI messages already monitored by the UE 115.
  • zero padding may be applied to align the DCI bit length to other DCI message (s) already monitored by the UE 115.
  • the BS 105 and/or the UE 115 may automatically assume that the DCI bit length is aligned to other DCI message (s) already monitored by the UE 115. Accordingly, the UE 115 may monitor for the DCI message 510 based on a preconfigured block index and/or a preconfigured DCI bit length.
  • the BS 105 may configure the UE 115 with an SPS transmission indication monitoring window 504 during which the BS 105 may transmit the DCI message 510 including the SPS transmission cancellation.
  • the SPS transmission indication monitoring window 504 is separate from PDCCH monitoring occasions. For instance, the UE 115 may monitor for a DCI message 510 during PDCCH monitoring occasions that are within the SPS transmission indication monitoring window 504.
  • the BS 105 may configure the SPS transmission indication monitoring window 504 with respect to a time location of the SPS resource 502 where transmission is to be cancelled.
  • the BS 105 may configure the SPS transmission indication monitoring window 504 such that the SPS transmission indication monitoring window 504 ends before the start of the SPS resource 502 where transmission is to be cancelled.
  • the SPS transmission indication monitoring window 504 may be restricted to a duration shorter than an SPS period of an SPS configuration associated with the SPS resource 502. For instance, if the SPS resource 502 repeats at every ten slots 202, then SPS transmission indication monitoring window 504 is limited to be shorter than ten slots 202 (e.g., about 1, 2, 3, or 4 slots 202) .
  • the SPS transmission indication monitoring window 504 has a duration of three slots 202. As shown, the SPS resource 502 is located at slot 202 S4 and the SPS transmission indication monitoring window 504 begins at slot S2. In general, to cancel an SPS resource at slot n using an SPS transmission indication monitoring window 504 with a duration of K slots 202, the SPS transmission indication monitoring window 504 may begin at slot 202 (n-K-1) and ends at a symbol in slot n period to the SPS resource. The use of the SPS transmission indication monitoring window 504 can be useful in some situations where the BS 105 may not be able to allocate resource for the transmission of the SPS transmission cancellation (DCI message 510) in the same slot as where the SPS resource is located.
  • DCI message 510 resource for the transmission of the SPS transmission cancellation
  • the SPS transmission indication monitoring window 504 may allow the BS 105 to have more opportunities to transmit the DCI message 510. Accordingly, the UE 115 may determine the time location of an SPS transmission indication monitoring window 504 for an SPS resource and monitor for an SPS transmission cancellation (the DCI message 510) for the SPS resource during the SPS transmission indication monitoring window 504. If the UE 115 detected the DCI message 510 including the SPS transmission cancellation, the UE 115 may skip or refrain from monitoring the SPS resource 502 (by skipping packet decoding in the SPS resource 502) .
  • the UE 115 may monitor the SPS resource 502 (e.g., by performing SPS packet decoding) the SPS resource 502.
  • the BS 105 may transmit an SPS packet (e.g., a PDSCH data packet of a TSC traffic) in the SPS resource 502.
  • the DCI message 510 may include a single bit indicating a cancellation of an SPS transmission in a next upcoming SPS resource after the indication.
  • the DCI message 510 may include a bitmap where each bit may correspond to one of the multiple SPS configurations. In other words, each bit may be set to a value (e.g., a bit value of 1) to cancel a next upcoming SPS resource of a corresponding SPS configuration.
  • the bitmap may include N bits and the BS 105 may configure the UE 115 with M SPS configurations, where M and N are positive integers.
  • the BS 105 and/or the UE 115 may select N SPS configurations with the shortest periods among the M SPS configurations and map each bit to one of the N SPS configurations.
  • the BS 105 may provision for SPS transmission specific cancellations only for the N SPS configurations.
  • the BS 105 may not support SPS transmission specific cancellations for the other (M-N) SPS configurations.
  • M is smaller than N
  • the BS 105 may not utilize M bits to indicate whether a next SPS resource for the M SPS configurations is cancelled or not and may set the remaining (N-M) bits in the bitmap to zeros, which may be ignored by the UE 115.
  • FIG. 5B illustrates an SPS transmission indication scheme 520 according to some aspects of the present disclosure.
  • the scheme 520 may be employed by a BS (such as BS 105) and a UE (such as UE 115) for DL communications in a network (such as network 100) using SPS resources.
  • the x-axis represents time in some arbitrary units.
  • the scheme 520 is described using the same SPS configuration as the scheme 500.
  • the scheme 520 may be substantially similar to the scheme 500, but the BS 105 may utilize a lack of SPS transmission validation to indicate an SPS transmission cancellation. For instance, if the BS 105 intends to transmit an SPS packet in the SPS resource 502, the BS 105 may transmit a DCI message 530 including an SPS transmission validation prior to the SPS resource 502. However, if the BS 105 intends to cancel a transmission in the SPS resource 502, the BS 105 may skip or refrain from transmitting the DCI message 530 including an SPS transmission validation (as shown by the arrow with the symbol “X” ) prior to the SPS resource 502.
  • the UE 115 may monitor for an SPS transmission validation (the DCI message 530) for the SPS resource 502 prior to the starting symbol of the SPS resource 502. If the UE 115 detected the DCI message 530 including the SPS transmission validation, the UE 115 may monitor the SPS resource 502 (e.g., by performing SPS packet decoding) the SPS resource 502. However, if the UE 115 fail to detect the SPS transmission validation (the DCI message 530) for the SPS resource 502, the UE 115 may skip or refrain from monitoring in the SPS resource 502 (by not performing packet decoding in the SPS resource 502) .
  • SPS transmission validation the DCI message 530
  • the UE 115 may skip or refrain from monitoring in the SPS resource 502 (by not performing packet decoding in the SPS resource 502) .
  • the DCI message 530 may be substantially similar to the DCI message 510. Additionally, the BS 105 may use substantially similar mechanisms to configure and transmit the DCI Message 530 as in the scheme 500 discussed above.
  • the DCI message 530 can be a GC-PDCCH message including a CRC scrambled by an SPS transmission indication specific-RNTI.
  • the DCI length within the DCI message 530 to be monitored by the UE 115 may be known to the UE 115, for example, based on a pre-configuration or an RRC configuration as discussed above.
  • the BS 105 may also configure the UE 115 to monitor for the SPS transmission validation in an SPS transmission indication monitoring window 504 configured as discussed above.
  • the DCI message 530 can also include a bitmap that can validate multiple SPS configuration individually as discussed above.
  • FIGS. 6-8 illustrate various mechanisms for indicating SPS transmission cancellations and/or SPS transmissions validations via PDCCH DCI signaling.
  • FIG. 6 illustrates an SPS transmission indication scheme 600 according to some aspects of the present disclosure.
  • the scheme 600 may be employed by a BS (such as BS 105) and a UE (such as UE 115) for DL communications in a network (such as network 100) using SPS resources.
  • the x-axis represents time in some arbitrary units.
  • a BS 105 may configure a UE 115 with multiple SPS configurations, for example, to over-provision SPS resources for serving TSC traffic to the UE 115 as discussed above in relation to FIG. 4.
  • the BS 105 may activate the multiple SPS configurations using similar activation mechanisms (via PDCCH DCI signaling with CS-RNTI) as discussed above in relation to FIG. 3.
  • the SPS configurations may have SPS resources 602 at slots 202 S1, S3, S5, and S7.
  • the SPS resources 602 may be of one or more of the SPS configurations.
  • each SPS resource 602 may be associated with a different SPS configuration.
  • some SPS resources 602 can be associated with the same SPS configuration, for example, depending on the traffic pattern.
  • the BS 105 may cancel multiple SPS transmissions by transmitting a DCI message 610 (e.g., in a PDCCH during slot S0) .
  • the DCI message 610 may include a number of SPS transmission cancellation field 612 indicating K SPS transmission cancellations as shown by 606.
  • the DCI message 610 may cancel transmissions in next K upcoming SPS resources 602 subsequent to the transmission of the DCI message 610.
  • the field 612 may include any suitable length (e.g., 1 bit, 2 bits, 3 bits, 4 bits, 5 bits, 6 bits or more) .
  • the field 612 may have a bit-length 2 and may indicate up to four SPS transmission cancellations.
  • bit-values “00” may indicate a cancellation for an SPS-PDSCH transmission in a next upcoming SPS resource 602
  • bit-values “01” may indicate transmission cancellations for next two upcoming SPS resource 602
  • bit-values “11” may indicate transmission cancellations for next three upcoming SPS resource 602
  • bit-values “11” may indicate transmission cancellations for next four upcoming SPS resource 602.
  • the BS 105 transmits a DCI message 610 indicating two SPS transmission cancellations, for example, based on a certain traffic pattern as discussed above in relation to FIG. 4. As shown, the BS 105 may skip transmission in the next two upcoming SPS resources 602 (at slots S1 and S3 shown by the symbol “X” ) after the transmission of the DCI message 610. Subsequently, the BS 105 may transmit an SPS packet in each of the SPS resources 602 at slots S5 and S7 (shown by the checkmark) . Accordingly, the UE 115 may monitor for the DCI message 610 in a PDCCH.
  • the UE 115 may refrain from monitoring in the next two SPS resources 602 after the reception of the DCI message 610 (by not performing packet decoding in the next two SPS resources 602) . Similarly, the UE 115 may monitor and perform SPS packet decoding in each of the SPS resources 602 at slots S5 and S7.
  • the BS 105 may use substantially similar mechanisms to configure and transmit the DCI Message 610 as in the scheme 500 discussed above in relation to FIG. 5A.
  • the DCI message 610 can be a GC-PDCCH message with a new DCI format 2_X and including a CRC scrambled by an SPS transmission indication specific-RNTI.
  • the DCI length within the DCI message 610 to be monitored by the UE 115 may be known to the UE 115, for example, based on a pre-configuration or an RRC configuration as discussed above.
  • the BS 105 may configure the UE 115 to monitor for the DCI message 610 according to an SPS transmission indication monitoring window (e.g., SPS transmission indication monitoring window 504) . Accordingly, the UE 115 may monitor for the DCI message 610 using similar mechanisms as discussed above in relation to FIG. 5A.
  • SPS transmission indication monitoring window e.g., SPS transmission indication monitoring window 504
  • the BS 105 may apply similar mechanisms to validate SPS transmissions. For instance, the BS 105 may transmit a DCI message (e.g., the DCI message 610) indicating SPS transmission validations for next K upcoming SPS resource (s) .
  • a DCI message e.g., the DCI message 610 indicating SPS transmission validations for next K upcoming SPS resource (s) .
  • FIG. 7 illustrates an SPS transmission indication scheme 700 according to some aspects of the present disclosure.
  • the scheme 700 may be employed by a BS (such as BS 105) and a UE (such as UE 115) for DL communications in a network (such as network 100) using SPS resources.
  • the x-axis represents time in some arbitrary units.
  • a BS 105 may configure a UE 115 with multiple SPS configurations, for example, to over-provision SPS resources for serving TSC traffic to the UE 115 as discussed above in relation to FIG. 4.
  • the BS 105 may activate the multiple SPS configurations using similar activation mechanisms (via PDCCH DCI signaling with CS-RNTI) as discussed above in relation to FIG. 3.
  • the SPS configurations may have SPS resources 702 at slots 202 S1, S3, S5, and S7.
  • the SPS resources 702 may be of one or more of the SPS configurations.
  • each SPS resource 702 may be associated with a different SPS configuration.
  • some SPS resources 702 can be associated with the same SPS configuration, for example, depending on the traffic pattern.
  • the BS 105 may cancel multiple SPS transmissions by transmitting a DCI message 710 (e.g., in a PDCCH during slot S0) .
  • the DCI message 710 may include an RIV field 712 as shown by 708.
  • the field 712 may include any suitable length (e.g., 1 bit, 2 bits, 3 bits, 4 bits, 5 bits, 6 bits or more) .
  • the RIV field 712 may have a bit-length of 6.
  • the RIV field 712 may indicate a beginning slot 202 where SPS transmission cancellations may start and the number of slots 202 where SPS transmissions are to be cancelled.
  • the RIV field 712 may indicate an RIV expressed as shown below:
  • N slots represents the number of slots associated with the RIV field 712 and L represents the number of slots 202 where SPS transmission (s) are to be cancelled.
  • the number of slots 202 where SPS transmissions are to be cancelled begins in a slot 202 offset by the parameter offset from the slot 202 where the DCI message 710 is received.
  • L is a number of slots from a beginning a slot 202 (where an earliest SPS resource to be cancelled) to a last slot 202 (where a latest SPS resource) is to be cancelled. In other words, any SPS resource from the beginning slot 202 to the last slot 202 are to be cancelled.
  • the BS 105 may determine to cancel SPS transmissions in SPS resources 702 at slots S3, S5, and S7 (show by the symbol “X” ) .
  • the BS 105 may transmit a DCI message 710 during the slot 202 S0 to cancel the SPS transmissions.
  • the SPS cancellations begins 3 slots 202 away from the slot 202 S0 where the DCI message 710 is transmitted, and the SPS cancellations are from slots S3 to S7 (where slot S3 includes an earliest SPS resource to be cancelled and slot S7 includes a last SPS resource to be cancelled) .
  • the BS 105 may compute an RIV by setting N slots to 9, L to 5, and the parameter offset to 3 to equation (1) .
  • the resulting RIV may have a value of 50.
  • the BS 105 may transmit the DCI message 710 with the RIV field 712 set to 50 and may skip SPS transmissions beginning at slot S3, S5, and S7. Since the offset 704 is 3 slots, the BS 105 may transmit an SPS transmission in an SPS resource 702 at slot S1, which is within the offset 704.
  • the UE 115 may monitor for a DCI message 710 in a PDCCH. Upon receiving the DCI message 710 indicating RIV, the UE 115 may determine the offset 704 and the length 706 from the RIV. The UE 115 may refrain from monitoring in SPS resources 702 (by not performing packet decoding) beginning at slot S3 until slot S5 based on the offset 704 and the length 706. However, the UE 115 may monitor and perform SPS packet decoding in SPS resource (s) 702 (e.g., at slot S1) within the offset 704.
  • SPS resource (s) 702 e.g., at slot S1
  • the BS 105 may use substantially similar mechanisms to configure and transmit the DCI Message 710 as in the scheme 500 discussed above in relation to FIG. 5A.
  • the DCI message 710 can be a GC-PDCCH message with a new DCI format 2_X and including a CRC scrambled by an SPS transmission indication specific-RNTI.
  • the DCI length within the DCI message 710 to be monitored by the UE 115 may be known to the UE 115, for example, based on a pre-configuration or an RRC configuration as discussed above.
  • the BS 105 may configure the UE 115 to monitor for the DCI message 710 according to an SPS transmission indication monitoring window (e.g., SPS transmission indication monitoring window 504) . Accordingly, the UE 115 may monitor for the DCI message 710 using similar mechanisms as discussed above in relation to FIG. 5A.
  • SPS transmission indication monitoring window e.g., SPS transmission indication monitoring window 504
  • the BS 105 may apply similar mechanisms to validate SPS transmissions. For instance, the BS 105 may transmit a DCI message (e.g., the DCI message 610) including an RIV that indicates a slot (offset from the slot where the DCI message is transmitted) where SPS transmission validations begin and a number of slots where SPS transmissions are validated.
  • a DCI message e.g., the DCI message 610
  • RIV indicates a slot (offset from the slot where the DCI message is transmitted) where SPS transmission validations begin and a number of slots where SPS transmissions are validated.
  • FIG. 8 illustrates an SPS transmission indication scheme 800 according to some aspects of the present disclosure.
  • the scheme 800 may be employed by a BS (such as BS 105) and a UE (such as UE 115) for DL communications in a network (such as network 100) using SPS resources.
  • the x-axis represents time in some arbitrary units.
  • a BS 105 may configure a UE 115 with multiple SPS configurations, for example, to over-provision SPS resources for serving TSC traffic to the UE 115 as discussed above in relation to FIG. 4.
  • the BS 105 may activate the multiple SPS configurations using similar activation mechanisms (via PDCCH DCI signaling with CS-RNTI) as discussed above in relation to FIG. 3.
  • the SPS configurations may have SPS resources 802 at slots 202 S1, S3, S5, and S7.
  • the SPS resources 802 may be of one or more of the SPS configurations.
  • each SPS resource 802 may be associated with a different SPS configuration.
  • some SPS resources 802 can be associated with the same SPS configuration, for example, depending on the traffic pattern.
  • the BS 105 may transmit a DCI message 810 (e.g., in a PDCCH during slot S0) .
  • the DCI message 810 may include a bitmap 812 as shown by 806.
  • the bitmap 812 may have K number of bits (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or more) .
  • the bitmap 812 may indicate whether each of next K SPS resources 802 is cancelled or not. For instance, each bit may in the bitmap 808 may be associated with one of next K SPS resources 802.
  • the BS 105 transmits a DCI message 610 indicating a bitmap 812 having 4 bits b0 to b3 with bit-values “0100” as shown by 808.
  • a bit-value of 0 may indicate an SPS cancellation
  • a bit-value of 1 may indicate an SPS validation.
  • the BS 105 cancels SPS transmission in the SPS resources 802 at slot S1 (shown by the symbol “X” ) based on b0 being 0.
  • the BS 105 transmits an SPS transmission in the SPS resources 802 at slot S3 (shown by the checkmark) based on b1 being 1.
  • the BS 105 cancels SPS transmission in the SPS resources 802 at slot S5 (shown by the symbol “X” ) based on b2 being 0.
  • the BS 105 cancels SPS transmission in the SPS resources 802 at slot S7 (shown by the symbol “X” ) based on b3 being 0.
  • the UE 115 may monitor for a DCI message 810 in a PDCCH.
  • the UE 115 may determine whether an SPS transmission in each of next K number of SPS resources 802 is cancelled or validated based on a corresponding bit in the bitmap 812. For instance, when the UE 115 decoded a bit-value of 0100 for the bitmap 812, the UE 115 may refrain from monitoring in the SPS resources 802 (by not performing packet decoding) at slot S1, S5, and S7, but may monitor and perform packet decoding in the SPS resource 802 at slot S3.
  • bit-value of 1 may indicate an SPS cancellation
  • bit-value of 0 may indicate an SPS validation.
  • bit positions may be reversed.
  • the bitmap 812 may indicate SPS cancellations beginning at a D slots 202 offset from the slot 202 where the bitmap 812 is received.
  • the offset (D slots) can be predetermined.
  • the BS 105 may configure the UE 115 with the offset (D slots) , for example, via RRC. For instance, the example shown in FIG. 8 may correspond to a case where D is 0.
  • the BS 105 may use substantially similar mechanisms to configure and transmit the DCI Message 810 as in the scheme 500 discussed above in relation to FIG. 5A.
  • the DCI message 810 can be a GC-PDCCH message with a new DCI format 2_X and including a CRC scrambled by an SPS transmission indication specific-RNTI.
  • the DCI length within the DCI message 810 to be monitored by the UE 115 may be known to the UE 115, for example, based on a pre-configuration or an RRC configuration as discussed above.
  • the BS 105 may configure the UE 115 to monitor for the DCI message 810 according to an SPS transmission indication monitoring window (e.g., SPS transmission indication monitoring window 504) . Accordingly, the UE 115 may monitor for the DCI message 810 using similar mechanisms as discussed above in relation to FIG. 5A.
  • SPS transmission indication monitoring window e.g., SPS transmission indication monitoring window 504
  • a BS 105 may allocate a common resource (e.g., a time-frequency resource) for multiple UEs 115 for SPS transmission cancellation and/or SPS transmission validation indications.
  • the BS 105 may indicate an SPS transmission cancellation or an SPS transmission validation via waveform sequence transmission (s) or a lack of waveform sequence transmission (s) in the common resource.
  • the BS 105 may utilize a combination of reference signal (e.g., DMRS) transmission in an SPS resource and/or a first waveform sequence in the common resource for an SPS transmission cancellation and/or validation for the SPS resource.
  • DMRS reference signal
  • FIGS. 9-10 illustrate an SPS transmission validation via waveform sequence transmission (s) or an SPS transmission cancellation via a lack of waveform sequence transmission (s) .
  • FIG. 9 is a flow diagram illustrating an SPS transmission indication method 900 according to some aspects of the present disclosure. Aspects of the method 900 can be executed by a computing device (e.g., a processor, processing circuit, and/or other suitable component) of a wireless communication device or other suitable means for performing the steps.
  • a computing device e.g., a processor, processing circuit, and/or other suitable component
  • a wireless communication device such as a BS 105 or the BS 1700, may utilize one or more components, such as the processor 1702, the memory 1704, the SPS module1708, the transceiver 1710, the modem 1712, and the one or more antennas 1716, to execute the steps of method 900.
  • the method 900 includes a number of enumerated steps, but embodiments of the method 900 may include additional steps before, after, and in between the enumerated steps. In some aspects, one or more of the enumerated steps may be omitted or performed in a different order.
  • a BS may configure a UE (e.g., UE 115) with a plurality of SPS configurations, for example, to over-provision SPS resources for serving TSC traffic to the UE 115 as discussed above in relation to FIG. 4.
  • the BS 105 may activate the plurality of SPS configurations using similar activation mechanisms (via PDCCH DCI signaling with CS-RNTI) as discussed above in relation to FIG. 3.
  • the BS may configure the UE with a common resource shared by multiple UEs.
  • the BS may determine whether to utilize a reference signal (e.g., a DMRS) transmission in an SPS resource or a first waveform sequence transmission in the common resource to indicate an SPS transmission validation for the SPS resource based on a number of RBs in the SPS resource.
  • a reference signal e.g., a DMRS
  • the common resource can be located a time before the SPS resource.
  • the common resource can be within the same slot (e.g., slot 202) as the SPS resource.
  • the common resource can be within a different slot than the SPS resource.
  • a reference signal may occupy a fewer number of REs (e.g., frequency resources similar to the REs 212 shown in FIG. 2) per RBs than the first waveform sequence.
  • the first waveform sequence can have a higher frequency density than the reference signal.
  • the first waveform sequence can provide the UE 115 with a more reliable waveform detection.
  • the BS determines whether to cancel an SPS transmission in a first SPS resource (e.g., the SPS resources 302, 402, 502, 602, 702, and/or 802) associated with a first SPS configuration of the plurality SPS configurations.
  • a first SPS resource e.g., the SPS resources 302, 402, 502, 602, 702, and/or 802 associated with a first SPS configuration of the plurality SPS configurations.
  • the BS may over-provisions SPS resources with multiple SPS configurations as shown in FIG. 4 to provision for a certain traffic periodicity.
  • each SPS configuration may have an SPS instance or SPS resource within a certain time period (e.g., in a certain slot 202) that is offset from each other.
  • the BS may not use all SPS resources of each SPS configuration during the time period.
  • the BS may transmit in one SPS resource of one of the multiple SPS configurations during the time period and may cancel SPS transmissions in the other SPS resources of other SPS configurations during the time period. If the BS determines to cancel the SPS transmission in the first SPS resource, the BS proceed to block 920.
  • the BS determines whether the number of RBs in the first SPS resource exceeds (or satisfies) a threshold. If the BS determines the number of RBs in the first SPS resource exceeds (or satisfies) the threshold, the BS proceeds to block 922.
  • the BS in response to determining the number of RBs in the first SPS resource exceeds (or satisfies) the threshold, refrains from transmitting a reference signal (e.g., a predetermined waveform sequence) in the first SPS resource to indicate an SPS transmission cancellation in the first SPS resource.
  • the BS may also refrain from transmitting SPS data in the first SPS resource.
  • the BS determines the number of RBs in the first SPS resource does not exceed (or fails to satisfy) threshold. If the BS determines the number of RBs in the first SPS resource does not exceed (or fails to satisfy) threshold, the BS proceeds to block 924. At block 924, in response to determining the number of RBs in the first SPS resource does not exceed (or fails to satisfy) the threshold, the BS refrains from transmitting the first waveform sequence in the common resource to indicate an SPS transmission cancellation in the first SPS resource.
  • the BS determines whether the number of RBs in the first SPS resource exceeds a threshold. If the BS determines the number of RBs in the first SPS resource exceeds (or satisfies) the threshold, the BS proceeds to block 932
  • the BS transmits a reference signal in the first SPS resource to indicate an SPS transmission validation for the first SPS resource.
  • the reference signal may be a predetermined sequence and may be transmitted at predetermined time and/or frequency locations.
  • the BS may transmit the reference signal along with SPS data (PDSCH data) in the first SPS resource.
  • the reference signal (DMRS) can facilitate SPS data decoding at the UE.
  • the BS determines the number of RBs in the first SPS resource does not exceed (or fails to satisfy) threshold.
  • the BS transmits the first waveform sequence in the common resource to indicate an SPS transmission validation for the first SPS resource.
  • the first waveform sequence may be a predetermined sequence (which may be different from the reference signal) and may be transmitted at predetermined time and/or frequency locations.
  • the BS may also transmit the reference signal along with SPS data in the first SPS resource.
  • FIG. 10 is a flow diagram illustrating an SPS transmission indication detection method 1000 according to some aspects of the present disclosure.
  • Aspects of the method 1000 can be executed by a computing device (e.g., a processor, processing circuit, and/or other suitable component) of a wireless communication device or other suitable means for performing the steps.
  • a wireless communication device such as a BS 105 or the BS 1700, may utilize one or more components, such as the processor 1102, the memory 1104, HARQ module1108, the transceiver 1110, the modem 1112, and the one or more antennas 1116, to execute the steps of method 1000.
  • the method 1000 includes a number of enumerated steps, but embodiments of the method 1000 may include additional steps before, after, and in between the enumerated steps. In some aspects, one or more of the enumerated steps may be omitted or performed in a different order.
  • a UE may receive, from a BS (e.g., BS 105) , a plurality of SPS configurations, for example, for TSC traffic communication as discussed above in relation to FIG. 4.
  • the UE 115 may receive an activation for the plurality of SPS configurations using similar activation mechanisms (via PDCCH DCI signaling with CS-RNTI) as discussed above in relation to FIG. 3.
  • the UE may also receive, from the BS, a configuration for a common resource shared by multiple UEs, where the BS may indicate an SPS transmission validation in an SPS resource via a reference signal transmission in the SPS resource or a first waveform sequence transmission in the common resource.
  • the UE may implement the method 1000 to determine whether an SPS transmission is to be transmitted in a first SPS resource associated with a first SPS configuration of the plurality of SPS configurations when the BS implements the method 900 of FIG. 9.
  • the UE determines whether the number of RBs in a first SPS resource exceeds (or satisfies) an RB threshold. If the UE determines the number of RBs in the common resource exceeds (or satisfies) the RB threshold, the BS proceeds to block 1020.
  • the UE performs a reference signal detection in the first SPS resource.
  • the reference signal may be a predetermined sequence and transmitted by the BS at predetermined time and/or frequency locations.
  • the sequence and the time/frequency locations may be known to the UE or preconfigured at the UE.
  • the UE may perform the reference signal detection based on time and/or frequency locations where the reference signal is transmitted.
  • the UE may compute a cross-correlation between the reference signal and a signal received from the first SPS resource at the time and/or frequency locations is assigned to the reference signal and determines a first energy based on the cross-correlation.
  • the UE determines whether the first energy exceeds (or satisfies) a first threshold. If the UE determines the first energy exceeds (or satisfies) the first threshold (indicating the presence of the reference signal in the first SPS resource) , the UE proceeds to block 1050.
  • the UE monitors for an SPS transmission in the first SPS resource. In other words, if the UE detected the reference signal in the first SPS resource, the UE determines that the SPS transmission is not cancelled for the first SPS resource.
  • the monitoring may include performing blind packet decoding in the first SPS resource, for example, based on the MCS configured for the first SPS configuration (corresponding to the first SPS resource) during when the BS activate the first SPS configuration.
  • the UE determines the first energy does not exceed (or fails to satisfy) the first threshold (indicating the absence of the reference signal in the first SPS resource) , the UE proceeds to block 1040.
  • the UE refrains from monitoring for an SPS transmission (by not performing packet decoding) in the first SPS resource. In other words, if the UE fails to detect a reference signal in the first SPS resource, the UE determines that the SPS transmission is cancelled for the first SPS resource.
  • the BS proceeds to block 1020.
  • the UE performs a first waveform sequence detection.
  • the first waveform sequence may be a predetermined sequence and transmitted by the BS at predetermined time and/or frequency locations.
  • the sequence and the time/frequency locations may be known to the UE or preconfigured at the UE.
  • the UE may perform the first waveform sequence detection based on the time and/or frequency locations where the first waveform sequence is transmitted.
  • the UE may compute a cross-correlation between the first waveform sequence and a signal received from the common resource at the time and/or frequency locations is assigned to the first waveform sequence and determines a second energy based on the cross-correlation.
  • the UE determines whether the second energy exceeds (or satisfies) a second threshold.
  • the second threshold is the same as the first threshold. In some other instances, the second threshold may be the different than the first threshold. If the UE determines the second energy exceeds (or satisfies) the second threshold (indicating the presence of the first waveform sequence in the common resource) , the UE proceeds to block 1050.
  • the UE monitors for an SPS transmission in the first SPS resource. In other words, the UE may determine that an SPS transmission is not cancelled in the first SPS resource if the UE detected the first waveform sequence in the common resource.
  • the UE determines the second energy does not exceed (or fails to satisfy) the second threshold (indicating the absence of the first waveform sequence in the common resource) if the UE determines the second energy does not exceed (or fails to satisfy) the second threshold (indicating the absence of the first waveform sequence in the common resource) .
  • the UE refrains from monitoring for an SPS transmission (by not performing packet decoding) in the first SPS resource.
  • the UE may determine that an SPS transmission is cancelled in the first SPS resource if the UE fails to detect the reference signal in the first SPS resource when the number of RBs satisfies the RB threshold or fails to detect the first waveform sequence in the common resource when the number of RBs fails to satisfy the RB threshold.
  • FIGS. 11-12 illustrate an SPS transmission cancellation via waveform sequence transmission (s) or an SPS transmission validation via a lack of waveform sequence transmission (s) .
  • FIG. 11 is a flow diagram illustrating an SPS transmission indication method 1100 according to some aspects of the present disclosure. Aspects of the method 1100 can be executed by a computing device (e.g., a processor, processing circuit, and/or other suitable component) of a wireless communication device or other suitable means for performing the steps.
  • a computing device e.g., a processor, processing circuit, and/or other suitable component
  • a wireless communication device such as a BS 105 or the BS 1700, may utilize one or more components, such as the processor 1702, the memory 1704, the SPS module 1708, the transceiver 1710, the modem 1712, and the one or more antennas 1716, to execute the steps of method 1100.
  • the method 900 includes a number of enumerated steps, but embodiments of the method 1100 may include additional steps before, after, and in between the enumerated steps. In some aspects, one or more of the enumerated steps may be omitted or performed in a different order.
  • a BS may configure a UE (e.g., UE 115) with a plurality of SPS configurations, for example, to over-provision SPS resources for serving TSC traffic to the UE 115 as discussed above in relation to FIG. 4.
  • the BS 105 may activate the plurality of SPS configurations using similar activation mechanisms (via PDCCH DCI signaling with CS-RNTI) as discussed above in relation to FIG. 3.
  • the BS may configure the UE with a common resource shared by multiple UEs.
  • the BS may transmit a first waveform sequence in the common resource to indicate an SPS transmission cancellation.
  • the BS determines whether to cancel an SPS transmission in a first SPS resource (e.g., the SPS resources 302, 402, 502, 602, 702, and/or 802) associated with a first SPS configuration of the plurality SPS configurations.
  • a first SPS resource e.g., the SPS resources 302, 402, 502, 602, 702, and/or 802 associated with a first SPS configuration of the plurality SPS configurations.
  • the BS may over-provisions SPS resources with multiple SPS configurations as shown in FIG. 4 to provision for a certain traffic periodicity. Thus, the BS may not use all SPS resources of each SPS configuration during the time period. If the BS determines to cancel the SPS transmission in the first SPS resource, the BS proceeds to block 1120.
  • the BS transmits first waveform sequence in the common resource.
  • the BS may also further refrain from transmitting a reference signal and SPS data in the first SPS resource.
  • the BS determines not to cancel the SPS transmission in the first SPS resource
  • the BS proceeds to block 1130.
  • the BS refrains from transmitting the first waveform sequence in the common resource.
  • the BS may transmit a reference signal (e.g., a DMRS) along with the SPS packet in the first SPS resource.
  • a reference signal e.g., a DMRS
  • FIG. 12 is a flow diagram illustrating an SPS transmission indication detection method 1200 according to some aspects of the present disclosure. Aspects of the method 1200 can be executed by a computing device (e.g., a processor, processing circuit, and/or other suitable component) of a wireless communication device or other suitable means for performing the steps.
  • a computing device e.g., a processor, processing circuit, and/or other suitable component
  • a wireless communication device such as a BS 105 or the BS 1700, may utilize one or more components, such as the processor 1702, the memory 1704, the SPS module 1708, the transceiver 1710, the modem 1712, and the one or more antennas 1716, to execute the steps of method 1200.
  • the method 1200 includes a number of enumerated steps, but embodiments of the method 1200 may include additional steps before, after, and in between the enumerated steps. In some aspects, one or more of the enumerated steps may be omitted or performed in a different order.
  • a UE may receive, from a BS (e.g., BS 105) , a plurality of SPS configurations, for example, for TSC traffic communications.
  • the UE 115 may receive an activation for the plurality of SPS configurations using similar activation mechanisms (via PDCCH DCI signaling with CS-RNTI) as discussed above in relation to FIG. 3.
  • the UE may also receive, from the BS, a configuration for a common resource shared by multiple UEs, where the BS may indicate an SPS transmission cancellation or validation in the common resource.
  • the UE may implement the method 1200 to determine whether an SPS transmission is to be transmitted in a first SPS resource associated with a first SPS configuration of the plurality of SPS configurations when the BS implements the method 1100 of FIG. 11.
  • the UE performs a reference signal detection in a first SPS resource.
  • the reference signal may be a predetermined sequence and transmitted by the BS at predetermined time and/or frequency locations.
  • the sequence and the time/frequency locations may be known to the UE or preconfigured at the UE.
  • the UE may perform the reference signal detection based on time and/or frequency locations where the reference signal is transmitted.
  • the UE may compute a cross-correlation between the reference signal and a signal received from the first SPS resource at the time and/or frequency locations is assigned to the reference signal and determines a first energy based on the cross-correlation.
  • the UE determines whether the first energy exceeds (or satisfies) a first threshold. If the UE determines the first energy does not exceed (or fails to satisfy) the first threshold, the UE proceeds to block 1230.
  • the UE performs a first waveform sequence detection in the common resource.
  • the first waveform sequence may be a predetermined sequence and transmitted by the BS at predetermined time and/or frequency locations.
  • the sequence and the time/frequency locations may be known to the UE or preconfigured at the UE.
  • the UE may perform the first waveform sequence detection based on the time and/or frequency locations where the first waveform sequence is transmitted.
  • the UE may compute a cross-correlation between the first waveform sequence and a signal received from the common resource at the time and/or frequency locations is assigned to the first waveform sequence and determines a second energy based on the cross-correlation.
  • the UE determines whether the second energy exceeds (or satisfies) a second threshold.
  • the second threshold is the same as the first threshold. In some other instances, the second threshold may be the different than the first threshold. If the UE determines the second energy exceeds (or satisfies) the second threshold, the UE proceeds to block 1250.
  • the UE in response to determining the second energy exceeds (or satisfies) the second threshold (indicating the presence of the first waveform sequence in the common resource) , the UE refrains from monitoring for an SPS transmission (by not performing packet decoding) in the first SPS resource. In other words, if the UE detected a first waveform sequence in the common resource, the UE determines that the SPS transmission is cancelled for the first SPS resource.
  • the UE determines the second energy does not exceed (or fails to satisfy) the second threshold (indicating the absence of the first waveform sequence in the common resource) .
  • the UE proceeds to block 1260.
  • the UE monitors for an SPS transmission in the first SPS resource. In other words, if the UE fails to detect the first waveform sequence in the common resource, the UE determines that the SPS transmission is not cancelled for the first SPS resource.
  • the UE determines the first energy (computed from the reference signal detection) exceeds (or satisfies) the first threshold (indicating the presence of the reference signal in the first SPS resource) , the UE proceeds to block 1260 and monitors for an SPS transmission in the first SPS resource. For instance, the UE may be aware that the BS may transmit the reference signal in the first SPS resource if the BS is to transmit an SPS packet in the first SPS resource. Thus, if the UE detected the reference signal in the first SPS resource, it may not be necessary for the UE to perform a first waveform sequence detection.
  • the UE may fail to detect the reference signal due to a poor channel condition (e.g., a low signal-to-noise ratio (SNR) ) .
  • a poor channel condition e.g., a low signal-to-noise ratio (SNR)
  • the UE may perform the first waveform sequence detection to determine whether the BS cancels the SPS transmission in the first SPS resource.
  • the BS 105 may configure each UE 115 with N waveform sequences specific to the corresponding UE 115 and each waveform sequence may correspond to one SPS configuration at the corresponding UE 115, where N is a positive integer.
  • the number of waveform sequences may be the same as the number of SPS configurations at the UE 115.
  • the BS may transmit a waveform sequence (e.g., the first waveform sequence discussed above in relation to FIGS.
  • the UE 115 may perform waveform sequence detection according to the N waveform sequences.
  • the UE 115 may determine whether the BS 105 is to transmit/cancel an SPS transmission in a first SPS resource associated with a first SPS configuration by determining whether a waveform sequence corresponding to the first SPS configuration is detected in the common resource or not.
  • the BS may configure the UE 115 with more than N SPS configurations.
  • the BS may select N SPS configurations with the shortest periods among the M SPS configurations, and may only validate/cancel those N SPS configurations by transmitting corresponding waveform sequences.
  • the SPS instances or SPS resources for the remaining (N-M) SPS configurations may not be specifically validated or cancelled.
  • the SPS configurations with the shorter periodicities may correspond to traffic or transmissions that are more time sensitive or have a lower latency than SPS configurations with longer periodicities.
  • the BS may give priority to SPS resources with SPS configurations that are more time sensitive or have a lower latency.
  • the BS 105 may use M of the N waveform sequences for indicating an SPS cancellation or validation for the M SPS configuration and may not utilize the remaining (N-M) waveform sequences.
  • the UE 115 may perform waveform detection for M of the N waveform sequences, and may disregard the remaining (N-M) waveform sequences.
  • the BS 105 may indicate to the UE 115 which of the M waveform sequences to use or rules for determining which of the M waveform sequences to use.
  • the BS 105 may indicate SPS transmission cancellations/validations for different UEs 115 using TDM. For instance, the BS 105 may allocate different UEs 115 with different symbols in the common resource for SPS transmission cancellations/validations. In some other aspects, the BS 105 may indicate SPS transmission cancellation or validations for different UEs 115 using FDM. For instance, the BS 105 may allocate different UEs 115 with different RBs in the common resource for SPS transmission cancellations/validations. In some other aspects, the BS 105 may indicate SPS transmission cancellation or validations for different UEs 115 using CDM.
  • the BS 105 may allocate different UEs 115 with different (orthogonal) sequences. Some example sequences may include Walsh spread code, Zadoff-Chu (ZC) sequence, or M sequence.
  • the CDM may be applied across time and/or frequency. For spreading across time, the BS 105 may repeat the first waveform sequence in multiple symbols and multiplies each symbol according to a corresponding orthogonal code. For spreading across frequency, the BS 105 may repeat the first waveform sequence in multiple RBs or groups of RBs and multiplies each RB or each group of RBs according to a corresponding orthogonal code. In some aspects, the BS 105 may utilize a combination of TDM, FDM, and CDM for the SPS transmission cancellation or validation indication as shown in FIG. 13.
  • FIG. 13 illustrates an SPS transmission indication scheme 1300 according to some aspects of the present disclosure.
  • the scheme 1300 may be employed by a BS (such as BS 105) and a UE (such as UE 115) for DL communications in a network (such as network 100) using SPS resources.
  • the x-axis represents time in some arbitrary units
  • the y-axis represents frequency in some arbitrary units.
  • a BS 105 may configure a UE 115 with multiple SPS configurations, for example, to over-provision SPS resources for serving TSC traffic to the UE 115 as discussed above in relation to FIG. 4.
  • the BS 105 may activate the multiple SPS configurations using similar activation mechanisms (via PDCCH DCI signaling with CS-RNTI) as discussed above in relation to FIG. 3.
  • the scheme 1300 can be employed in conjunction with the method 900, 1000, 1100, and/or 1200 discussed above with respect to FIGS. 9, 10, 11, and/or 12.
  • the BS 105 may allocate a common resource 1302 for multiple UEs 115 for SPS transmission cancellation or validation indications.
  • the resource 1302 may occupy a number of subcarriers in frequency and a number of symbols in time.
  • the BS 105 may transmit a waveform sequence 1310 in the common resource 1302 to indicate to a first UE 115 of the multiple UEs whether an SPS packet is to be transmitted in a first SPS resource associated with a first SPS configuration configured the first UE 115.
  • the waveform sequence 1310 may be associated with the first SPS configuration. In some aspects the waveform sequence 1310 may correspond to the first waveform sequence discussed above in relation to FIGS. 9-12.
  • the BS 105 may transmit the waveform sequence 1310 to indicate an SPS transmission cancellation in a first SPS resource or instance associated with the first SPS configuration. In some aspects, the BS 105 may transmit the waveform sequence 1310 to indicate an SPS transmission validation for a first SPS resource or instance associated with the first SPS configuration. In some aspects, the BS 105 may configure different UEs with different TDM resources within the common resource 1302, and thus the BS 105 may transmit the waveform sequence 1310 in certain symbol (s) within the common resource 1302 allocated for the UE 115.
  • the BS 105 may configure different UEs with different FDM resources within the common resource 1302, and thus the BS 105 may transmit the waveform sequence 1310 in certain subcarrier (s) within the common resource 1302 allocated for the UE 115.
  • the BS 105 may configure different UEs with different orthogonal codes for CDM in common resource 1302, and thus the BS 105 may apply a corresponding orthogonal code for the waveform sequence 1310 transmission.
  • the BS 105 may allocate multiple UEs on the same time resource and/or the same frequency resource within the common resource.
  • FIG. 14 illustrates an SPS transmission indication scheme 1400 according to some aspects of the present disclosure.
  • the scheme 1400 may be employed by a BS (such as BS 105) and a UE (such as UE 115) for DL communications in a network (such as network 100) using SPS resources.
  • the x-axis represents time in some arbitrary units
  • the y-axis represents frequency in some arbitrary units.
  • the scheme 1400 may be substantially similar to the scheme 1300, but additionally apply frequency hopping for waveform sequence transmission. Frequency hopping can provide frequency diversity gain, and thus may improve transmission performance for the SPS transmission cancellation or validation indications.
  • the BS 105 may allocate a frequency-hopping common resource 1402 (shown as 1402a, 1402b, and 1402c) for multiple UEs for SPS transmission cancellation or validation indications.
  • the common resource 1402a may be at a frequency subband 1404a during a period 1406a (e.g., one or more symbols) .
  • the common resource 1402b may be at a frequency subband 1404b during a period 1406b (e.g., one or more symbols) .
  • the common resource 1402c may be at a frequency subband 1404c during a period 1406c (e.g., one or more symbols) .
  • the BS 105 may transmit the waveform sequence 1410 by applying frequency hopping across subbands 1404a, 1404b, and 1404c. In some aspects, to indicate an SPS transmission validation for a first SPS resource or instance associated with the first SPS configuration, the BS 105 may transmit the waveform sequence 1410 by applying frequency hopping across subbands 1404a, 1404b, and 1404c.
  • the BS 105 transmits the waveform sequence 1410 in the subband 1404a during period 1406a, transmits the waveform sequence 1410 in the subband 1404b during period 1406b, and transmits the waveform sequence 1410 in the subband 1404c during period 1406c.
  • the BS 105 may also apply TDM, FDM, and/CDM as discussed above in FIG. 13 in addition to the frequency hopping.
  • FIG. 15 is a sequence diagram illustrating a communication method 1500 according to some aspects of the present disclosure.
  • the method 1500 may employ similar mechanisms as discussed above in relation to FIGS. 3-4, 5A-5B, and 6-14.
  • the UE 115 may utilize one or more components, such as the processor 1602, the memory 1604, the SPS module 1608, the transceiver 1610, the modem 1612, and the one or more antennas 1616 of FIG. 16, to execute the steps of method 1500.
  • the BS 105 may utilize one or more components, such as the processor 1702, the memory 1704, the SPS module 1708, the transceiver 1710, the modem 1712, and the one or more antennas 1716 of FIG. 17, to execute the steps of method 1500.
  • the method 1500 includes a number of enumerated actions, but aspects of the method 1500 may include additional actions before, after, and in between the enumerated actions. In some aspects, one or more of the enumerated actions may be omitted or performed in a different order.
  • the BS 105 configures the UE 115 with a first SPS configuration and a second SPS configuration, for example, via RRC signaling.
  • the first and second SPS configurations may be used for DL communications (e.g., over a PDSCH) .
  • Each of the first and second SPS configurations may indicate a periodicity and/or an HARQ process ID for an SPS-based schedule.
  • the BS 105 may configure the first and SPS configurations to over-provision resources to serve a traffic (e.g., TSC traffic) with a periodicity misalign to allowable or configurable SPS periodicities (e.g., 10 ms, 20 ms, 32, ms, 40 ms, 64 ms, 80 ms, 128 ms, 160 ms, 320 ms, or 640 ms) as discussed above in relation to FIG. 4.
  • a traffic e.g., TSC traffic
  • a periodicity misalign e.g. 10 ms, 20 ms, 32, ms, 40 ms, 64 ms, 80 ms, 128 ms, 160 ms, 320 ms, or 640 ms
  • the UE 115 upon receiving the first and second SPS configurations, the UE 115 monitors for an activation for each of the first and second SPS configurations, for example, based on CS-RNTI. For instance, the UE 115 may monitor for the activation by performing blind PDCCH DCI decoding based on the CS-RNTI.
  • the BS 105 activates each of the first and second SPS configurations. For instance, the BS 105 may transmit a PDCCH DCI message for each activation.
  • Each PDCCH DCI message may indicate an SPS resource and a MCS for the SPS resource as discussed above in relation to FIG. 3.
  • Each PDCCH DCI message may include a CRC scrambled with CS-RNTI.
  • the SPS resource may be periodic repeating according to a periodicity indicated by a corresponding SPS configuration.
  • the UE 115 may monitor for an SPS transmission specific cancellation indication prior to each SPS instance or resource associated with the first SPS configuration and each SPS instance or resource associated with the second SPS configuration from the BS 105. In some other instances, the UE 115 may monitor for an SPS transmission specific validation from the BS 105 and a cancellation may be indicated by a lack of validation received from the BS 105. In some aspects, the monitoring may include monitoring for a GC-PDCCH DCI message (a DCI format 2_X) with a CRC scrambled with a SPS transmission indication specific-RNTI as discussed above in relation to FIGS. 5A-5B and 6-8.
  • a GC-PDCCH DCI message (a DCI format 2_X) with a CRC scrambled with a SPS transmission indication specific-RNTI as discussed above in relation to FIGS. 5A-5B and 6-8.
  • the monitoring may include monitoring for a reference signal (e.g., a DMRS) in an SPS resource and/or a specific waveform sequence in a common resource (allocated for sharing by multiple UEs) to determine whether an SPS transmission is cancelled or validated for the SPS resource as discussed above in relation to FIGS. 9-14.
  • a reference signal e.g., a DMRS
  • a specific waveform sequence in a common resource (allocated for sharing by multiple UEs) to determine whether an SPS transmission is cancelled or validated for the SPS resource as discussed above in relation to FIGS. 9-14.
  • the BS 105 transmits an SPS transmission cancellation indication for a first SPS resource, for example, associated with the first SPS configuration.
  • the BS 105 may transmit an SPS transmission validation to validate a transmission, and thus may refrain from transmitting a validation to indicate a cancellation.
  • the BS 105 may transmit the indication in a GC-PDCCH DCI message (a DCI format 2_X) with a CRC scrambled with an SPS transmission indication specific-RNTI as discussed above in relation to FIGS. 5A-5B and 6-8.
  • the BS 105 may transmit the indication by transmitting a reference signal (e.g., a DMRS) in the first SPS resource and/or a specific waveform sequence in a common resource (allocated for sharing by multiple UEs) to indicate a cancellation or a validation for the first SPS resource as discussed above in relation to FIGS. 9-14.
  • a reference signal e.g., a DMRS
  • the BS 105 may indicate cancellations for two or more SPS transmissions as discussed above in relation to FIGS. 6-8.
  • the BS 105 cancels a first SPS transmission in the SPS resource or refrains from transmitting in the first SPS resource (as shown by the symbol “X” and the dashed line) according to the SPS transmission cancellation indication at 1550. For instance, the BS 105 may not prepare a packet for transmission in the first SPS resource.
  • the UE 115 in response to receiving the SPS transmission cancellation indication for the first SPS resource, refrains from monitoring the first SPS resource (by not performing packet decoding) . For instance, the UE 115 may not perform any packet decoding in the first SPS resource.
  • the BS 105 transmits a second SPS transmission in a second SPS resource (different from the first SPS resource) .
  • the first and second SPS resources are SPS instances of the first SPS configuration.
  • the first SPS resource in an SPS instance of the first SPS configuration, and the second SPS resource is an SPS instance of the second SPS configuration.
  • the UE 115 performs packet decoding in the second SPS resource to receive the second SPS transmission. For instance, the UE 115 may blindly decode a signal received from the second SPS resource based on an MCS assigned to the first configuration if the second SPS resource is an instance of the first configuration. Alternatively, the UE 115 may blindly decode a signal received from the second SPS resource based on an MCS assigned to the second configuration if the second SPS resource is an instance of the second configuration.
  • the UE 115 transmits a HARQ ACK/NACK feedback for the second SPS transmission. For instance, if the packet decoding at 1580 is successful, the UE 115 may transmit a HARQ ACK. However, if the packet decoding at 1580 is unsuccessful, the UE 115 may transmit a HARQ NACK. As shown, the UE 115 does not transmit any feedback for the first SPS resource as the UE 115 detected the cancellation for the SPS transmission in the first SPS resource.
  • FIG. 16 is a block diagram of an exemplary UE 1600 according to some aspects of the present disclosure.
  • the UE 1600 may be a UE 115 as discussed above in FIGS. 1 and 15.
  • the UE 1600 may include a processor 1602, a memory 1604, an SPS module 1608, a transceiver 1610 including a modem subsystem 1612 and a radio frequency (RF) unit 1614, and one or more antennas 1616.
  • RF radio frequency
  • the processor 1602 may include a central processing unit (CPU) , a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.
  • the processor 1602 may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • the memory 1604 may include a cache memory (e.g., a cache memory of the processor 1602) , random access memory (RAM) , magnetoresistive RAM (MRAM) , read-only memory (ROM) , programmable read-only memory (PROM) , erasable programmable read only memory (EPROM) , electrically erasable programmable read only memory (EEPROM) , flash memory, solid state memory device, hard disk drives, other forms of volatile and non-volatile memory, or a combination of different types of memory.
  • the memory 1604 includes a non-transitory computer-readable medium.
  • the memory 1604 may store, or have recorded thereon, instructions 1606.
  • the instructions 1606 may include instructions that, when executed by the processor 1602, cause the processor 1602 to perform the operations described herein with reference to the UEs 115, 115 in connection with aspects of the present disclosure, for example, aspects of FIGS. 2-4, 5A-5B, and 6-15. Instructions 1606 may also be referred to as program code.
  • the program code may be for causing a wireless communication device to perform these operations, for example by causing one or more processors (such as processor 1602) to control or command the wireless communication device to do so.
  • the terms “instructions” and “code” should be interpreted broadly to include any type of computer-readable statement (s) .
  • instructions and code may refer to one or more programs, routines, sub-routines, functions, procedures, etc. “Instructions” and “code” may include a single computer-readable statement or many computer-readable statements.
  • the SPS module 1608 may be implemented via hardware, software, or combinations thereof.
  • the SPS module 1608 may be implemented as a processor, circuit, and/or instructions 1606 stored in the memory 1604 and executed by the processor 1602.
  • the SPS module 1608 can be integrated within the modem subsystem 1612.
  • the SPS module 1608 can be implemented by a combination of software components (e.g., executed by a DSP or a general processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 1612.
  • the SPS module 1608 may communicate with one or more components of UE 1600 to implement various aspects of the present disclosure, for example, aspects of FIGS. 2-4, 5A-5B, and 6-15.
  • the SPS module 1608 is configured to receive, from a BS (e.g., BS 105, BS 1700) , a plurality of SPS configurations.
  • the plurality of SPS configurations may be similar to the SPS configurations 420, 422, and 424 discussed above in relation to FIG. 4.
  • the SPS module 1608 is further configured to monitor for an indication of whether a first SPS transmission is to be transmitted in a first SPS resource associated with a first SPS configuration of the plurality of SPS configurations, and the indication may be specific for at least one of the first SPS resource or the first SPS configuration.
  • the UE may monitor for an SPS transmission cancellation for the first SPS resource as part of the monitoring for the indication.
  • the SPS module 1608 is further configured to monitor for an SPS transmission validation for the first SPS resource as part of the monitoring for the indication.
  • the SPS module 1608 is further configured to monitor for a DCI message including the indication as discussed above in relation to FIGS. 5A-5B and 5-8.
  • the SPS module 1608 is further configured to monitor for the indication by performing one or more waveform detections as discussed above in FIGS. 9-14. In some aspects, the SPS module 1608 is further configured to refrain from monitoring the first SPS resource based on the monitoring for the indication. For instance, the SPS module 1608 is further configured to skip packet decoding in the first SPS resource based on receiving an SPS transmission cancellation for the first SPS resource from the monitoring or failing to receive an SPS transmission validation for the first SPS resource from the monitoring.
  • the transceiver 1610 may include the modem subsystem 1612 and the RF unit 1614.
  • the transceiver 1610 can be configured to communicate bi-directionally with other devices, such as the BSs 165, 165.
  • the modem subsystem 1612 may be configured to modulate and/or encode the data from the memory 1604 and/or the SPS module 1608 according to a modulation and coding scheme (MCS) , e.g., a low-density parity check (LDPC) coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc.
  • MCS modulation and coding scheme
  • LDPC low-density parity check
  • the RF unit 1614 may be configured to process (e.g., perform analog to digital conversion or digital to analog conversion, etc.
  • modulated/encoded data e.g., PUCCH UCI, PUSCH data, UCI, HARQ ACK/NACK
  • modulated/encoded data e.g., PUCCH UCI, PUSCH data, UCI, HARQ ACK/NACK
  • the RF unit 1614 may be further configured to perform analog beamforming in conjunction with the digital beamforming.
  • the modem subsystem 1612 and the RF unit 1614 may be separate devices that are coupled together at the UE 115 to enable the UE 115 to communicate with other devices.
  • the RF unit 1614 may provide the modulated and/or processed data, e.g. data packets (or, more generally, data messages that may contain one or more data packets and other information) , to the antennas 1616 for transmission to one or more other devices.
  • the antennas 1616 may further receive data messages transmitted from other devices.
  • the antennas 1616 may provide the received data messages for processing and/or demodulation at the transceiver 1610.
  • the transceiver 1610 may provide the demodulated and decoded data (e.g., RRC configurations, SPS configurations, SPS activations, SPS transmission specific cancellation, SPS transmission specific validation) to the SPS module 1608 for processing.
  • the antennas 1616 may include multiple antennas of similar or different designs in order to sustain multiple transmission links.
  • the transceiver 1610 is configured to communicate with one or more components of the UE 1600 to receive, from a BS (e.g., BS 105, BS 1700) , a plurality of SPS configurations.
  • the processor 1602 is configured to communicate with one or more components of the UE 1600 to monitor for an indication of whether a first SPS transmission is to be transmitted in a first SPS resource associated with a first SPS configuration of the plurality of SPS configurations and refrain from monitoring the first SPS resource based on the monitoring for the indication.
  • the indication may be specific for at least one of the first SPS resource or the first SPS configuration.
  • the UE 1600 can include multiple transceivers 1610 implementing different RATs (e.g., NR and LTE) .
  • the UE 1600 can include a single transceiver 1610 implementing multiple RATs (e.g., NR and LTE) .
  • the transceiver 1610 can include various components, where different combinations of components can implement different RATs.
  • FIG. 17 is a block diagram of an exemplary BS 1700 according to some aspects of the present disclosure.
  • the BS 1700 may be a BS 5 as discussed above in FIGS. 1, 3, and 5.
  • the BS 1700 may include a processor 1702, a memory 1704, a SPS module 1708, a transceiver 1710 including a modem subsystem 1712 and a RF unit 1714, and one or more antennas 1716. These elements may be in direct or indirect communication with each other, for example via one or more buses.
  • the processor 1702 may have various features as a specific-type processor. For example, these may include a CPU, a DSP, an ASIC, a controller, a FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.
  • the processor 1702 may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • the memory 1704 may include a cache memory (e.g., a cache memory of the processor 1702) , RAM, MRAM, ROM, PROM, EPROM, EEPROM, flash memory, a solid state memory device, one or more hard disk drives, memristor-based arrays, other forms of volatile and non-volatile memory, or a combination of different types of memory.
  • the memory 1704 may include a non-transitory computer-readable medium.
  • the memory 1704 may store instructions 1706.
  • the instructions 1706 may include instructions that, when executed by the processor 1702, cause the processor 1702 to perform operations described herein, for example, aspects of FIGS. 2-4, 5A-5B, and 6-15. Instructions 1706 may also be referred to as code, which may be interpreted broadly to include any type of computer-readable statement (s) as discussed above with respect to FIG. 16.
  • the SPS module 1708 may be implemented via hardware, software, or combinations thereof.
  • the SPS module 1708 may be implemented as a processor, circuit, and/or instructions 1706 stored in the memory 1704 and executed by the processor 1702.
  • the SPS module 1708 can be integrated within the modem subsystem 1712.
  • the SPS module 1708 can be implemented by a combination of software components (e.g., executed by a DSP or a general processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 1712.
  • the SPS module 1708 may communicate with one or more components of BS 1700 to implement various aspects of the present disclosure, for example, aspects of FIGS. 2-4, 5A-5B, and 6-15.
  • the SPS module 1708 is configured to transmit, to a UE (e.g., UE 115, UE 1600) , a plurality of SPS configurations.
  • the plurality of SPS configurations may be similar to the SPS configurations 420, 422, and 424 discussed above in relation to FIG. 4.
  • the SPS module 1708 is further configured to provide, to the UE, an indication of whether a first SPS transmission is to be transmitted in a first SPS resource associated with a first SPS configuration of the plurality of SPS configurations.
  • the indication may be specific for at least one of the first SPS resource or the first SPS configuration.
  • the SPS module 1708 is further configured to provide the indication by transmitting an SPS transmission cancellation for the first SPS resource.
  • the SPS module 1708 is further configured to provide the indication by transmitting an SPS transmission validation for the first SPS resource.
  • the SPS module 1708 is further configured to provide the indication via DCI signaling as discussed above in relation to FIGS. 5A-5B and 5-8.
  • the SPS module 1708 is further configured to provide the indication via waveform sequence transmission (s) as discussed above in FIGS. 9-14.
  • the SPS module 1708 is further configured to refrain from transmitting in the first SPS resource based on the indication being an SPS transmission cancellation indication.
  • the SPS module 1708 can be further configured to transmit in the first SPS resource based on the indication being an SPS transmission validation indication.
  • the transceiver 1710 may include the modem subsystem 1712 and the RF unit 1714.
  • the transceiver 1710 can be configured to communicate bi-directionally with other devices, such as the UEs 175, 175 and/or 1600 and/or another core network element.
  • the modem subsystem 1712 may be configured to modulate and/or encode data according to a MCS, e.g., a LDPC coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc.
  • the RF unit 1714 may be configured to process (e.g., perform analog to digital conversion or digital to analog conversion, etc.
  • modulated/encoded data e.g., RRC configurations, SPS configurations, SPS activations, SPS transmission specific cancellation, SPS transmission specific validation
  • modulated/encoded data e.g., RRC configurations, SPS configurations, SPS activations, SPS transmission specific cancellation, SPS transmission specific validation
  • the RF unit 1714 may be further configured to perform analog beamforming in conjunction with the digital beamforming.
  • the modem subsystem 1712 and/or the RF unit 1714 may be separate devices that are coupled together at the BS 1700 to enable the BS 1700 to communicate with other devices.
  • the RF unit 1714 may provide the modulated and/or processed data, e.g. data packets (or, more generally, data messages that may contain one or more data packets and other information) , to the antennas 1716 for transmission to one or more other devices. This may include, for example, transmission of information to complete attachment to a network and communication with a UE 115 or 1600 according to some aspects of the present disclosure.
  • the antennas 1716 may further receive data messages transmitted from other devices and provide the received data messages for processing and/or demodulation at the transceiver 1710.
  • the transceiver 1710 may provide the demodulated and decoded data (e.g., PUCCH UCI, PUSCH data, UCI, HARQ ACK/NACK) to the SPS module 1708 for processing.
  • the antennas 1716 may include multiple antennas of similar or different designs in order to sustain multiple transmission links.
  • the transceiver 1710 is configured to communicate with one or more components of the BS 1700 to transmit, to a UE (e.g., UE 115, UE 1600) , a plurality of SPS configurations associated with a plurality of SPS resources.
  • the processor 1702 is configured to communicate with one or more components of the BS 1700 to provide, to the UE, an indication of whether a first SPS transmission is to be transmitted in a first SPS resource associated with a first SPS configuration of the plurality of SPS configurations, and refrain from transmitting in the first SPS resource based on the indication.
  • the first SPS resource can be associated with a first SPS configuration of the plurality of SPS configurations.
  • the indication may be specific for at least one of the first SPS resource or the first SPS configuration.
  • the BS 1700 can include multiple transceivers 1710 implementing different RATs (e.g., NR and LTE) .
  • the BS 1700 can include a single transceiver 1710 implementing multiple RATs (e.g., NR and LTE) .
  • the transceiver 1710 can include various components, where different combinations of components can implement different RATs.
  • FIG. 18 is a flow diagram illustrating a communication method 1800 according to some aspects of the present disclosure. Aspects of the method 1800 can be executed by a computing device (e.g., a processor, processing circuit, and/or other suitable component) of a wireless communication device or other suitable means for performing the steps.
  • a wireless communication device such as a UE 115 or the UE 1600, may utilize one or more components, such as the processor 1602, the memory 1604, the SPS module 1608, the transceiver 1610, the modem 1612, and the one or more antennas 1616, to execute the steps of method 1800.
  • the method 1800 may employ similar mechanisms as described above in FIGS. 3-4, 5A-5B, and 6-15.
  • the method 1800 includes a number of enumerated steps, but embodiments of the method 1800 may include additional steps before, after, and in between the enumerated steps. In some aspects, one or more of the enumerated steps may be omitted or performed in a different order.
  • the UE receives, from a BS (e.g., BS 105, BS 1700) , a plurality of SPS configurations.
  • the plurality of SPS configurations may be similar to the SPS configurations 420, 422, and 424 discussed above in relation to FIG. 4.
  • the UE may utilize one or more components, such as the processor 1602, the memory 1604, the SPS module 1608, the transceiver 1610, the modem 1612, and the one or more antennas 1616, to perform the operations at block 1810.
  • the UE monitors for an indication of whether a first SPS transmission is to be transmitted in a first SPS resource associated with a first SPS configuration of the plurality of SPS configurations, and the indication may be specific for at least one of the first SPS resource or the first SPS configuration.
  • the UE may monitor for an SPS transmission cancellation for the first SPS resource.
  • the UE may monitor for an SPS transmission validation for the first SPS resource.
  • the UE may monitor for a DCI message including the indication as discussed above in relation to FIGS. 5A-5B and 5-8.
  • the UE may monitor for the indication by performing one or more waveform detections as discussed above in FIGS. 9-14.
  • the UE may utilize one or more components, such as the processor 1602, the memory 1604, the SPS module 1608, the transceiver 1610, the modem 1612, and the one or more antennas 1616, to perform the operations at block 1820.
  • the UE refrains from monitoring the first SPS resource based on the monitoring for the indication. For instance, the UE may skip packet decoding in the first SPS resource based on receiving an SPS transmission cancellation for the first SPS resource from the monitoring or failing to receive an SPS transmission validation for the first SPS resource from the monitoring.
  • the UE may utilize one or more components, such as the processor 1602, the memory 1604, the SPS module 1608, the transceiver 1610, the modem 1612, and the one or more antennas 1616, to perform the operations at block 1830.
  • the UE may monitor for a GC-PDCCH message including the indication based on an SPS transmission indication specific-RNTI.
  • the UE may monitor for a DCI message including a bitmap, and may determine whether the first SPS transmission is cancelled for the first SPS resource based on a first bit in the bitmap, the first bit being associated with the first SPS configuration.
  • each of the plurality of SPS configurations is associated with one bit in the bitmap.
  • a number of SPS configurations in the plurality of SPS configurations may be M, where M is a positive integer.
  • the bitmap may include N bits, where N is a positive integer and less than M.
  • the UE may further select, based on N being less than M, N SPS configurations from the plurality of SPS configurations based on one or more periodicities associated with the plurality of SPS configurations.
  • the UE may further map each SPS configurations of the N SPS configuration to one of the N bits in the bitmap.
  • the UE may identify the first bit for the SPS resource based on the mapping.
  • the UE may monitor, during an SPS transmission indication monitoring window, for a downlink control information (DCI) message including the indication, wherein a time location of the SPS transmission indication monitoring window is with respect to the first SPS resource.
  • DCI downlink control information
  • the SPS transmission indication monitoring window ends before a beginning symbol of the first SPS resource.
  • the SPS transmission indication monitoring window includes a duration shorter than an SPS period of the first SPS configuration.
  • the UE may refrain from the monitoring the first SPS resource further based on the first SPS resource being a next SPS resource after receiving the indication.
  • the UE may receive the indication indicating K SPS transmission cancellations, for example, as discussed above in relation to FIG. 6, wherein K is a positive integer.
  • the UE may further refrain from monitoring a next (K-1) SPS resources after the first SPS resource based on the K SPS transmission cancellations.
  • the UE may receive the indication including a resource indicator value (RIV) , which may provide a length and offset as shown in equation (1) above and discussed above in relation to FIG. 7.
  • RIV resource indicator value
  • the UE may refrain from monitoring the first SPS resource is further based on an offset determined from the RIV.
  • the UE may further refrain from monitoring any SPS resource within K slots beginning at a slot indicated by the offset (e.g., offset from a slot where the indication is received) and based on a length K determined from the RIV, wherein K is a positive integer.
  • the UE may receive the indication including a bitmap with a length of K, for example, as discussed above in relation to FIG. 8.
  • the UE may refrain from monitoring the first SPS resource is further based on a first bit in the bitmap indicating a first bit value, where the first bit is associated with a location of the first SPS resource within next K SPS resources after receiving the indication.
  • the UE may further receiving, from the BS in a second SPS resource associated with a second SPS configuration of the plurality of SPS configurations based on a second bit in the bitmap indicating a second bit value, a second SPS transmission, where the second bit is associated with a location of the second SPS resource within the next K SPS resources.
  • the UE may further receive, from the BS, a configuration indicating a common resource shared by multiple UEs including the UE.
  • the UE may perform at least one of a reference signal detection in the first SPS resource or a waveform sequence detection in the common resource, for example, as discussed above in relation to FIGS. 9-12.
  • the UE may perform the reference signal detection in the first SPS resource based on a determination of a number of resource block (RBs) in the first SPS resource satisfies a threshold; or perform the waveform sequence detection based on a determination of the number of RBs in the first SPS resource failing to satisfy the threshold.
  • the UE may refrain from monitoring the first SPS resource is further based on at least one of an energy detected from the reference signal detection or an energy detected from the waveform sequence detection failing to satisfy a threshold.
  • the UE may perform the reference signal detection (in the first SPS resource) , and may perform the waveform sequence detection (in the common resource) based on an energy detected from the reference signal detection (in the first SPS resource) failing to satisfy a first threshold.
  • the UE may refrain from monitoring the first SPS resource is further based on an energy detected from the waveform sequence detection (in the common resource) satisfying a second threshold.
  • the UE may receive a configuration indicating N waveform sequences specific to the UE, wherein N is a positive integer. As part of the monitoring at block 1820, the UE may perform the waveform sequence detection based on a first waveform sequence of the N waveform sequence, the first waveform sequence being associated with the first SPS configuration. In some aspects, each of the plurality of SPS configurations is associated with one of the N waveform sequences. In some aspects, a number of SPS configurations in the plurality of SPS configurations may be M, where M is a positive integer greater than N.
  • the UE may further select, based on M being greater than N, N SPS configurations from the plurality of SPS configurations based on one or more periodicities associated with the plurality of SPS configurations, and map each SPS configuration of the N SPS configurations to one of the N waveform sequences.
  • the UE may identify the first waveform sequence based on the mapping.
  • the UE may perform the waveform sequence detection is further based on at least one of a code-division-multiplexing (CDM) configuration, a time-division-multiplexing (TDM) configuration, a frequency-division-multiplexing (FDM) configuration, or a frequency-hopping configuration, for example, as discussed above in relation to FIGS. 13-14.
  • the UE may perform the waveform sequence detection further based on the CDM configuration, the TDM configuration, and the FDM configuration.
  • the UE may perform the waveform sequence detection is further based on the CDM configuration, the TDM configuration, the FDM configuration, and the frequency-hopping configuration.
  • the UE may refrain from transmitting a hybrid automatic repeat request (HARQ) acknowledgement/negative-acknowledgement (ACK/NACK) feedback for the first SPS resource based on the monitoring.
  • HARQ hybrid automatic repeat request
  • ACK/NACK acknowledgement/negative-acknowledgement
  • FIG. 19 is a flow diagram illustrating a communication method 1900 according to some aspects of the present disclosure.
  • Aspects of the method 1900 can be executed by a computing device (e.g., a processor, processing circuit, and/or other suitable component) of a wireless communication device or other suitable means for performing the steps.
  • a wireless communication device such as a BS 105 or the BS 1700, may utilize one or more components, such as the processor 1702, the memory 1704, the SPS module 1708, the transceiver 1710, the modem 1712, and the one or more antennas 1716, to execute the steps of method 1900.
  • the method 1900 may employ similar mechanisms as described above in FIGS. 3-4, 5A-5B, and 6-15.
  • the method 1900 includes a number of enumerated steps, but embodiments of the method 1900 may include additional steps before, after, and in between the enumerated steps. In some aspects, one or more of the enumerated steps may be omitted or performed in a different order.
  • the BS transmits, to a UE (e.g., the UE 115, the UE 1600) , a plurality of semi-persistent scheduling (SPS) configurations.
  • SPS semi-persistent scheduling
  • the plurality of SPS configurations may be similar to the SPS configurations 420, 422, and 424 discussed above in relation to FIG. 4.
  • the BS may utilize one or more components, such as the processor 1702, the memory 1704, the SPS module 1708, the transceiver 1710, the modem 1712, and the one or more antennas 1716, to perform the operations at block 1910.
  • the BS provides, to the UE, an indication of whether a first SPS transmission is to be transmitted in a first SPS resource of the plurality of SPS resources associated with a first SPS configuration of the plurality of SPS configurations, and the indication may be specific for at least one of the first SPS resource or the first SPS configuration.
  • the BS may provide the indication by transmitting an SPS transmission cancellation for the first SPS resource.
  • the BS may provide the indication by transmitting an SPS transmission validation for the first SPS resource.
  • the BS may provide the indication via transmitting a DCI signaling as discussed above in relation to FIGS. 5A-5B and 5-8.
  • the BS may provide the indication via waveform sequence transmission (s) as discussed above in FIGS. 9-14.
  • the BS may utilize one or more components, such as the processor 1702, the memory 1704, the SPS module 1708, the transceiver 1710, the modem 1712, and the one or more antennas 1716, to perform the operations at block 1920.
  • the BS refrains from transmitting the first SPS transmission in the first SPS resource based on the indication. For instance, the BS may not generate a packet for transmission in the first SPS resource.
  • the BS may utilize one or more components, such as the processor 1702, the memory 1704, the SPS module 1708, the transceiver 1710, the modem 1712, and the one or more antennas 1716, to perform the operations at block 1930.
  • the BS may transmit a GC-PDCCH message including the indication based on an SPS transmission indication specific-RNTI.
  • the BS may transmit the indication including a bitmap, where a first bit in the bitmap indicating an SPS transmission cancellation for the first SPS resource, the first bit being associated with the first SPS configuration.
  • each of the plurality of SPS configurations is associated with one bit in the bitmap.
  • a number of SPS configurations in the plurality of SPS configurations may be M, where M is a positive integer.
  • the bitmap may include N bits, where N is a positive integer and less than M.
  • the BS may further select, based on N being less than M, N SPS configurations from the plurality of SPS configurations based on one or more periodicities associated with the plurality of SPS configurations.
  • the BS may further map each SPS configurations of the N SPS configuration to one of the N bits in the bitmap.
  • the BS may identify the first bit for the SPS resource based on the mapping.
  • the BS may transmit, during an SPS transmission indication monitoring window, a downlink control information (DCI) message including the indication, where a time location of the SPS transmission indication monitoring window is with respect to the first SPS resource.
  • DCI downlink control information
  • the SPS transmission indication monitoring window ends before a beginning symbol of the first SPS resource.
  • the SPS transmission indication monitoring window includes a duration shorter than an SPS period of the first SPS configuration.
  • the BS may refrain from transmitting in the first SPS resource further based on the first SPS resource being a next SPS resource after the indication.
  • the BS may transmit the indication indicating K SPS transmission cancellations, for example, as discussed above in relation to FIG. 6, wherein K is a positive integer.
  • the BS may further refrain from transmitting in a next (K-1) SPS resources after the first SPS resource based on the K SPS transmission cancellations.
  • the BS may transmitting the indication including a resource indicator value (RIV) , which may provide a length and offset as shown in equation (1) above and discussed above in relation to FIG. 7.
  • RIV resource indicator value
  • the BS may refrain from transmitting in the first SPS resource is further based on an offset determined from the RIV.
  • the BS may further refrain from transmitting in any SPS resource in K slots beginning at a slot indicated by the offset (e.g., offset from a slot where the indication is transmitted) and based on a length K determined from the RIV, wherein K is a positive integer.
  • the BS may transmit the indication including a bitmap with a length of K, for example, as discussed above in relation to FIG. 8.
  • the BS may refrain from transmitting in the first SPS resource is further based on a first bit in the bitmap indicating a first bit value, where the first bit is associated with a location of the first SPS resource within next K SPS resources after receiving the indication.
  • the BS may further transmit, to the UE in a second SPS resource associated with a second SPS configuration of the plurality of SPS configurations based on a second bit in the bitmap indicating a second bit value, a second SPS transmission, where the second bit is associated with a location of the second SPS resource within the next K SPS resources.
  • the BS may further transmit, to the UE, a configuration indicating a common resource shared by multiple UEs including the UE.
  • the UE may refrain from transmitting at least one of a reference signal in the first SPS resource or a first waveform sequence in the common resource; or transmitting the first waveform sequence in the common resource, for example, as discussed above in relation to FIGS. 9-12.
  • the UE may refrain, based on a determination of a number of resource block (RBs) in the first SPS resource satisfies a threshold, from transmitting a reference signal in the first SPS resource to indicate an SPS transmission cancellation for the first SPS resource; or refrain, based on a determination of the number of RBs in the first SPS resource failing to satisfy the threshold, from transmitting a first waveform sequence in the common resource to indicate an SPS transmission cancellation for the first SPS resource.
  • RBs resource block
  • the BS may refrain from transmitting a reference signal in the first SPS resource; and transmit the first waveform sequence in the common resource to indicate an SPS transmission cancellation for the first SPS resource.
  • the BS may further transmit, to the UE, a configuration indicating N waveform sequences specific to the UE, where N is a positive integer, the N waveform sequences includes the first waveform sequence, and the first waveform sequence is associated with the first SPS configuration.
  • each of the plurality of SPS configurations is associated with one of the N waveform sequences.
  • a number of SPS configurations in the plurality of SPS configurations may be M, where M is a positive integer greater than N.
  • the BS may further select, based on M being greater than N, N SPS configurations from the plurality of SPS configurations based on one or more periodicities associated with the plurality of SPS configurations, and map each SPS configuration of the N SPS configurations to one of the N waveform sequences.
  • the BS may identify the first waveform sequence based on the mapping.
  • the BS may transmit the first waveform sequence in the common resource further based on at least one of a code-division-multiplexing (CDM) configuration, a time-division-multiplexing (TDM) configuration, a frequency-division-multiplexing (FDM) configuration, or a frequency-hopping configuration, for example, as discussed above in relation to FIGS. 13-14.
  • the BS may transmitting the first waveform sequence in the common resource further based on the CDM configuration, the TDM configuration, and the FDM configuration.
  • the BS may transmit the first waveform sequence in the common resource further based on the CDM configuration, the TDM configuration, the FDM configuration, and the frequency-hopping configuration.
  • Information and signals may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) .
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • “or” as used in a list of items indicates an inclusive list such that, for example, a list of [at least one of A, B, or C] means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) .

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Abstract

L'invention concerne des systèmes et des procédés de communications sans fil relatifs à une annulation ou une validation spécifique à une transmission de planification semi-persistante (SPS). Selon un aspect, un équipement utilisateur (UE) reçoit, en provenance d'une station de base (BS), une pluralité de configurations de planification semi-persistante (SPS). L'UE surveille une indication précisant si une première transmission de SPS doit être transmise dans une première ressource SPS, la première ressource SPS étant associée à une première configuration de SPS de la pluralité de configurations de SPS, l'indication étant spécifique pour la première ressource SPS ou la première configuration de SPS. L'UE s'abstient de surveiller la première ressource SPS sur la base de la surveillance pour l'indication.
PCT/CN2020/108432 2020-08-11 2020-08-11 Indication de transmission de paquets de planification semi-persistante (sps) Ceased WO2022032477A1 (fr)

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