WO2022213238A1 - Transmission fiable sur des bandes sous licence et sans licence - Google Patents

Transmission fiable sur des bandes sous licence et sans licence Download PDF

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Publication number
WO2022213238A1
WO2022213238A1 PCT/CN2021/085535 CN2021085535W WO2022213238A1 WO 2022213238 A1 WO2022213238 A1 WO 2022213238A1 CN 2021085535 W CN2021085535 W CN 2021085535W WO 2022213238 A1 WO2022213238 A1 WO 2022213238A1
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WO
WIPO (PCT)
Prior art keywords
resources
signal
data transmission
transmission
processor
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PCT/CN2021/085535
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English (en)
Inventor
Renato BARBOSA ABREU
Claudio Rosa
Chunli Wu
Tao Tao
Original Assignee
Nokia Shanghai Bell Co., Ltd.
Nokia Solutions And Networks Oy
Nokia Technologies Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Nokia Shanghai Bell Co., Ltd., Nokia Solutions And Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co., Ltd.
Priority to PCT/CN2021/085535 priority Critical patent/WO2022213238A1/fr
Priority to CN202180099059.9A priority patent/CN117441396A/zh
Publication of WO2022213238A1 publication Critical patent/WO2022213238A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1893—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames

Definitions

  • Embodiments of the present disclosure generally relate to the field of telecommunication and in particular, to devices, methods, apparatus and computer readable storage media of reliable transmission on both the on licensed and unlicensed bands.
  • the 5G New Radio (NR) system architecture is interested in supporting the Ultra-Reliable Low-Latency Communication (URLLC) and Industrial IoT (IIoT) on both licensed and unlicensed spectrums.
  • URLLC Ultra-Reliable Low-Latency Communication
  • IIoT Industrial IoT
  • the unlicensed spectrum is shared among various terminal devices and radio access technologies, and thus it may be difficult to efficiently coordinate their accesses to the channel.
  • a terminal device may perform clear channel assessment (CCA) based on energy detection on the unlicensed spectrum.
  • CCA clear channel assessment
  • the URLLC has very strict requirements in terms of reliability and latency, e.g., 99.999%of success probability within latency as low as 1ms.
  • Time Sensitive Communications (TSCs) as one of use cases in IIoT, are characterized by deterministic and periodic traffic, which also has a strict requirement in terms of survival time.
  • the survival time is defined as a time that an application consuming a communication service may continue without an anticipated message.
  • a communication service may be considered unavailable if two or more consecutive messages are not delivered within a latency budget, that is, the survival time is equivalent to 2 periods.
  • mission-critical services such as URLLC/TSC, on the unlicensed spectrum since unexpected interferences on the channel may prevent high priority transmissions to occur due to a failure of the CCA procedure.
  • example embodiments of the present disclosure provide a solution of reliable transmission on both the on licensed and unlicensed bands.
  • a first device comprising at least one processor; and at least one memory including computer program codes; the at least one memory and the computer program codes are configured to, with the at least one processor, cause the first device at least to: in accordance with a determination that a data transmission is to be transmitted to a second device, perform a transmission attempt for the data transmission on a first set of resources; transmit, on a second set of resources, a signal to the second device, the signal indicating the transmission attempt performed by the first device, the second set of resources being different from the first set of resources; and in accordance with a failure of the transmission attempt, transmit, to the second device, the data transmission on a third set of resources different from the first set of resources.
  • a second device comprises at least one processor; and at least one memory including computer program codes; the at least one memory and the computer program codes are configured to, with the at least one processor, cause the second device at least to: receive, from a first device, a signal on a second set of resources, the signal indicating a transmission attempt performed by the first device, the transmission attempt performed for a data transmission to be transmitted on a first set of resources; in accordance of the receipt of the signal, determine whether the data transmission is transmitted on the first set of resources; and in accordance with a determination that no data transmission is received on the first set of resources, receive, from the first device, the data transmission on a third set of resources different from the first set of resources.
  • a method comprises: in accordance with a determination that a data transmission is to be transmitted to a second device, performing, at a first device, a transmission attempt for the data transmission on a first set of resources; transmitting, on a second set of resources, a signal to the second device, the signal indicating the transmission attempt performed by the first device, the second set of resources being different from the first set of resources; and in accordance with a failure of the transmission attempt, transmitting, to the second device, the data transmission on a third set of resources different from the first set of resources.
  • a method comprises: receiving, at a second device and from a first device, a signal on a second set of resources, the signal indicating a transmission attempt performed by the first device, the transmission attempt performed for a data transmission to be transmitted on a first set of resources; in accordance of the receipt of the signal, determining whether the data transmission is transmitted on the first set of resources; and in accordance with a determination that no data transmission is received on the first set of resources, receiving, from the first device, the data transmission on a third set of resources different from the first set of resources.
  • a first apparatus comprising: means for in accordance with a determination that a data transmission is to be transmitted to a second apparatus, performing, at the first apparatus, a transmission attempt for the data transmission on a first set of resources; means for transmitting, on a second set of resources, a signal to the second apparatus, the signal indicating the transmission attempt performed by the first apparatus, the second set of resources being different from the first set of resources; and means for in accordance with a failure of the transmission attempt, transmitting, to the second apparatus, the data transmission on a third set of resources different from the first set of resources.
  • a second apparatus comprising: means for receiving, at a second apparatus and from a first apparatus, a signal on a second set of resources, the signal indicating a transmission attempt performed by the first apparatus, the transmission attempt performed for a data transmission to be transmitted on a first set of resources; means for in accordance of the receipt of the signal, determining whether the data transmission is transmitted on the first set of resources; and means for in accordance with a determination that no data transmission is received on the first set of resources, receiving, from the first apparatus, the data transmission on a third set of resources different from the first set of resources.
  • a computer readable medium having a computer program stored thereon which, when executed by at least one processor of a device, causes the device to carry out the method according to the third aspect.
  • a computer readable medium having a computer program stored thereon which, when executed by at least one processor of a device, causes the device to carry out the method according to the fourth aspect.
  • FIG. 1 shows an example environment in which example embodiments of the present disclosure can be implemented
  • FIG. 2 shows a signaling chart illustrating a reliable transmission mechanism according to some example embodiments of the present disclosure
  • FIG. 3 shows a schematic diagram of a reliable transmission mechanism according to some example embodiments of the present disclosure
  • FIG. 4 shows a schematic diagram of a reliable transmission mechanism according to some example embodiments of the present disclosure
  • FIG. 5 shows a flowchart of an example method of reliable transmission according to some example embodiments of the present disclosure
  • FIG. 6 shows a flowchart of an example method of reliable transmission according to some example embodiments of the present disclosure
  • FIG. 7 shows a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure.
  • FIG. 8 shows a block diagram of an example computer readable medium in accordance with some embodiments of the present disclosure.
  • references in the present disclosure to “one embodiment, ” “an embodiment, ” “an example embodiment, ” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an example embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
  • circuitry may refer to one or more or all of the following:
  • circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
  • the term “communication network” refers to a network following any suitable communication standards, such as fifth generation (5G) systems, Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Internet of Things (NB-IoT) and so on.
  • 5G fifth generation
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • NB-IoT Narrow Band Internet of Things
  • the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the future fifth generation (5G) new radio (NR) communication protocols, and/or any other protocols either currently known or to be developed in the future.
  • suitable generation communication protocols including, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the future fifth generation (5G) new radio (NR) communication protocols, and/or any other protocols either currently known or to be developed in the future.
  • Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the
  • the term “network device” refers to a node in a communication network via which a terminal device accesses the network and receives services therefrom.
  • the network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a NR Next Generation NodeB (gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, a low power node such as a femto, a pico, and so forth, depending on the applied terminology and technology.
  • the network device is allowed to be defined as part of a gNB such as for example in CU/DU split in which case the network device is defined to be either a gNB-CU or a gNB-DU.
  • terminal device refers to any end device that may be capable of wireless communication.
  • a terminal device may also be referred to as a communication device, user equipment (UE) , a Subscriber Station (SS) , a Portable Subscriber Station, a Mobile Station (MS) , or an Access Terminal (AT) .
  • UE user equipment
  • SS Subscriber Station
  • MS Mobile Station
  • AT Access Terminal
  • the terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, wireless customer-premises equipment (CPE) , an Internet of Things (IoT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device and applications (e.g., remote surgery) , an industrial device and applications (e.g., a robot and/or other wireless devices operating in an industrial and/or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and/
  • the terminal device may also correspond to Mobile Termination (MT) part of the integrated access and backhaul (IAB) node (a.k.a. a relay node) .
  • MT Mobile Termination
  • IAB integrated access and backhaul
  • the terms “terminal device” , “communication device” , “terminal” , “user equipment” and “UE” may be used interchangeably.
  • a user equipment apparatus such as a cell phone or tablet computer or laptop computer or desktop computer or mobile IoT device or fixed IoT device
  • This user equipment apparatus can, for example, be furnished with corresponding capabilities as described in connection with the fixed and/or the wireless network node (s) , as appropriate.
  • the user equipment apparatus may be the user equipment and/or or a control device, such as a chipset or processor, configured to control the user equipment when installed therein. Examples of such functionalities include the bootstrapping server function and/or the home subscriber server, which may be implemented in the user equipment apparatus by providing the user equipment apparatus with software configured to cause the user equipment apparatus to perform from the point of view of these functions/nodes.
  • the current highly reliable and low latency communications are suitable for implementations in a controlled environment where the failure of LBT is not expected to occur, or only happens sporadically.
  • the unlicensed spectrum is shared among various devices and radio access technologies (RATs) , and thus there may be interferences from other RATs present in the uncontrolled environment.
  • RATs radio access technologies
  • the accesses from multiple terminal devices to the operating channel are difficult to be efficiently coordinated by simply utilizing the conventional CCA procedure; and 2) the sporadic interferences may severely impact the ability of a communication system, such as, the NR-unlicensed (NR-U) system, in terms of low latency and high reliability.
  • NR-U NR-unlicensed
  • URLLC is characterized by sporadic traffic which, when arrives in the terminal device, needs to be successfully transmitted with very short latency.
  • the configured-grant (CG) resources i.e., periodic resources that are pre-allocated for the UL transmissions, are used to avoid a delay prone scheduling procedure.
  • the terminal device would not be able to transmit in the CG resource and the network device (e.g., gNB) is not aware that the terminal device has a high priority data to transmit.
  • the network device may expect the terminal device to transmit on a set of granted resources, which are scheduled or pre-configured by the network device. If the LBT fails, the terminal device cannot transmit the data until a new grant is available, which incurs potentially high Hybrid automatic repeat request (HARQ) delays in addition to harmful jitter, especially for TSC.
  • HARQ Hybrid automatic repeat request
  • PDCP Packet Data Convergence Protocol
  • Another proposed solution is autonomous retransmission based on the cg-retransmission timer. This scheme has a high delay, since the terminal device has to wait the cg-retransmission timer expire until a next attempt to transmit data. Thus, the CG retransmission is still prone to LBT failure on unlicensed bands.
  • embodiments of the present disclosure provide a reliable transmission scheme for both the dynamic scheduled or deterministic transmission and the CG transmissions.
  • the terminal device informs the network device of an attempt of data transmission or a failure of LBT on an original band (e.g., unlicensed band) in a flexible and timely manner. Once the LBT on unlicensed band is failed, the terminal device may use backup resources allocated from a further band to transmit the data transmissions. Further, in a case that the data transmission is successfully transmitted on the original band, the network device may re-allocate the backup resources for other transmissions. In this way, the transmissions that require low latency and high reliability can be transmitted on both licensed and unlicensed bands, and the spectrum efficiency is improved.
  • FIG. 1 shows an example environment 100 in which example embodiments of the present disclosure can be implemented.
  • the network system 100 comprises first device 110, a second device 120, and a third device 130.
  • the first device 110 (hereinafter may also be referred to as a terminal device 110 or a UE 110) is located within a radio coverage of the second device 120, and may communicate with the second device 120.
  • the third device 130 is also located within the radio coverage and may communicate with the second device 120.
  • a link from the first device 110 or the third device 130 to the second device 120 is referred to as an uplink (UL)
  • UL uplink
  • DL downlink
  • the first device 110 and the third device 130 may transmit data on multiple carriers or sub-bands including licensed and unlicensed bands, which also refers to as a channel.
  • the data transmissions of the first device 110 and the third device 130 may be transmitted in uplink configured-grant, dynamically scheduled or deterministic manner, which will be discussed in details below.
  • the terminal devices may perform a transmission attempt, such as, CCA (e.g., LBT) before transmission of data.
  • CCA e.g., LBT
  • the terminal device performs energy detection on the channel to determine whether the channel is busy. If the result of the CCA indicates that the channel is busy, in other words, the LBT is failed, the data may not be transmitted on the channel.
  • the second device 120 may be a network device, for example, base stations that provide radio coverages to terminal devices.
  • the second device 120 may respectively transmit various transmission configurations to the first device 110 and the third device 130 via multiple messages.
  • the second device 120 may transmit transmission configurations indicative of a resource allocation, priority of the data transmission and so on via a RRC message.
  • the second device 120 may transmit transmission configurations indicative of the resource allocation, priority of the data transmission and so on via downlink control information (DCI) .
  • DCI downlink control information
  • the resource allocation may include a first set of resources which correspond to an original transmission occasion, for example, a first transmission time interval (TTI) .
  • the first set of resources may be allocated by the second device 120 from an unlicensed band.
  • the second device 120 may further transmit transmission configurations indicative of a third set of resources for the data transmission.
  • the third set of resources may be allocated by the second device 120 from either an unlicensed band or a licensed band.
  • the third set of resources is different from the first set of resources and corresponds to a backup transmission occasion later than the original occasion, for example, a second TTI.
  • the unlicensed band for the third set of resources may be more reliable than the unlicensed band for the first set of resources, e.g., in a less congested channel.
  • the terminal device may perform the transmission attempt on the first set of resources. If the transmission attempt is successful, the terminal device may transmit the data transmission at the original transmission occasion. Otherwise, if the data transmission is not allowed to be transmitted due to a failure of the transmission attempt, the first device 110 may transmit the data transmission at the backup transmission occasion by using the third set of resources.
  • the transmission configurations indicative of the third set of resources may be transmitted together with the transmission configurations indicative of the first set of resources, or transmitted separately.
  • the third set of resources may be pre-allocated by the second device 120 and the transmission configuration indicating at least the third set of resources may be transmitted before the transmission attempt.
  • the third set of resources may be allocated by the second device 120 upon determination of a failure of the transmission attempt.
  • the second device 120 may further allocate a second set of resources for a signal indicating the transmission attempt performed by the first device 110.
  • the second set of resources may be allocated from an unlicensed spectrum or a licensed spectrum and different from the first set of resources.
  • the signal may be transmitted by the terminal device to indicate an intention to transmit the data transmission on the first set of resources at the original transmission occasion.
  • a further signal may be used for indicating a failure of transmission attempt.
  • the second device 120 may determine that no data transmission is to be transmitted on the first set of resources, which will be discussed in details below.
  • the second device 120 may transmit a configuration of the signal indicating at least the second set of resources in a RRC message, for example, the ConfiguredGrantConfig information element (IE) , the LogicalChannelConfig IE and so on.
  • IE ConfiguredGrantConfig information element
  • LogicalChannelConfig IE LogicalChannelConfig IE
  • the signal includes but not limited to a reference signal, a preamble signal, a scheduling request (SR) signal or uplink control information (UCI) .
  • the UCI may be transmitted on, for example, the physical uplink control channel (PUCCH) that is configured on the licensed band by the second device 120.
  • the signal may be configured like the SR signal with a periodicity matching with the periodicity of the CG resources associated in unlicensed band, that is, the first set of resources.
  • the signal may further indicate that the HARQ process for the third set of resources is associated with the HARQ process for the first set of resources, which will be discussed in details below.
  • the signal for the transmission attempt may be optional.
  • the second device 120 is aware of the data transmission to occur at the original transmission occasion without any signal from the first device 110. In this case, if the second device 120 does not receive the data transmission on the first set of resources as expected, the third set of resources, which is used for backup resources, is to be used.
  • the network system 100 may include any suitable number of terminal device, network device and additional devices adapted for implementing implementations of the present disclosure.
  • the first device 110 and the third device 130 are illustrated as mobile phones and the second device 120 is illustrated as a base station, they may be other devices than mobile phones, base stations or a part of the same.
  • the network 200 may be a Code Division Multiple Access (CDMA) network, a Time Division Multiple Address (TDMA) network, a Frequency Division Multiple Access (FDMA) network, an Orthogonal Frequency-Division Multiple Access (OFDMA) network, a Single Carrier-Frequency Division Multiple Access (SC-FDMA) network or any others.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Address
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency-Division Multiple Access
  • SC-FDMA Single Carrier-Frequency Division Multiple Access
  • Communications discussed in the network 100 may conform to any suitable standards including, but not limited to, New Radio Access (NR) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , cdma2000, and Global System for Mobile Communications (GSM) and the like.
  • NR New Radio Access
  • LTE Long Term Evolution
  • LTE-A LTE-Evolution
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • the communications may be performed according to any generation of communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols.
  • the techniques described herein may be used
  • FIG. 2 shows a signaling chart illustrating a reliable transmission mechanism according to some example embodiments of the present disclosure.
  • the process 200 will be described with reference to FIG. 1.
  • the process 200 may involve the first device 110 and the second device 120.
  • the second device 120 transmits 205 the transmission configuration for the data transmission to the first device 110.
  • the transmission configuration may be transmitted in a RRC message for configuring the first set of resources, which correspond to an original transmission occasion, for example, a first TTI.
  • the transmission configuration may be transmitted in DCI for indicating the first set of resources.
  • the first set of resources may be allocated from an unlicensed band.
  • the second device 120 may further transmit the transmission configuration for a third set of resources to the first device 110.
  • the third set of resources may correspond to a backup transmission occasion later than the original transmission occasion, for example, a second TTI.
  • the third set of resources may be different from the first set of resources and allocated from either an unlicensed band or a licensed band.
  • the unlicensed band for the third set of resources may be more reliable than the unlicensed band for the first set of resources, e.g., in a less congested channel, so as to ensure that when the data transmission fails to be transmitted on the first set of resource, it can be successfully transmitted on the third set of resources.
  • the first set of resources may be indicated in an UL grant for the data transmission from the second device 120, and the third set of resources is pre-allocated by the second device 120.
  • the second device 120 may transmit a first DCI indicating at least the third set of resources to the first device 110.
  • the first DCI may further indicate the first set of resources.
  • the second device 120 may transmit further DCI, e.g., second DCI, for indicating the third set of resources to the first device 110.
  • the first device 110 determines 210 that a data transmission is to be transmitted to the second device 120.
  • the second device 120 is aware of the data transmission to be transmitted on the original transmission occasion. In some cases, the second device 120 may be aware of the data transmission to be transmitted or not to be transmitted based on a signal transmitted from the first device 110.
  • the first device 110 performs 215 a transmission attempt for the data transmission on the first set of resources.
  • the transmission attempt may include CCA procedure.
  • the first device 110 may transmit 220 the signal indicating the transmission attempt performed by the first device 110.
  • the second device 120 may further allocate a second set of resources from either an unlicensed spectrum or a licensed spectrum for the signal for the transmission attempt of the data transmission.
  • the second set of resources may be different from the first set of resources.
  • the signal may be transmitted before or almost simultaneously with the transmission attempt.
  • the second device 120 may transmit a first configuration of the signal indicating at least the second set of resources, which may correspond to a first transmission occasion before the original transmission occasion.
  • the signal may be associated with a plurality of data transmissions on contiguous resources including the first set of resources.
  • the second device 120 may determine whether the first of the consecutive resources is detected upon receipt of the signal.
  • a further signal may be used by the terminal device to indicate that no data transmission is to be transmitted on the first set of resources at the original transmission occasion due to a failure of the transmission attempt.
  • the further signal may be transmitted only when the transmission attempt failure happens.
  • the terminal device may transmit the further signal after the transmission attempt.
  • the second device 120 may transmit a second configuration of the further signal indicating at least resources for the further signal, which may correspond to the second transmission occasion being after the performance of the transmission attempt.
  • the signal for transmission attempt may be a simple flag or 1-bit indicator for merely inform about the transmission attempt on the first set of resources.
  • the signal may further indicate HARQ related information.
  • the signal may be a multi-bit indicator transmitted in PUCCH UCI for further indicating information about the data transmission, such as the HARQ process number (e.g., HARQ ID) , or other HARQ related information. In this way, no HARQ round trip delay may be caused by the switching from the first set of resource to the third set of resources.
  • the signal may indicate a first HARQ process number (HPN) for the data transmission on the first set of resources.
  • the signal may indicate a second HPN for the data transmission on the third set of resources and the second HPN is different from the first HPN.
  • multiple indicators which may be differentiated by in time, frequency, space or code domain, may be associated with the data transmission.
  • the first device 110 may select the transmission indicator indicating further information about the data transmission. For example. if the transmission configuration may be used for HPN 1 and HPN 2, the first device 110 may select a first indicator in case of attempting the data transmission for HPN 1, and a second t indicator in case of attempting the data transmission for HPN 2.
  • the signal is optional for the data transmission.
  • the second device 120 is aware of the data transmission to occur at the original transmission occasion without any signal or indicator from the first device 110. If the second device 120 does not receive the data transmission on the first set of resources as expected, the third set of resources, which is used for backup resources, is expected to be used.
  • FIG. 3 shows a schematic diagram of a reliable transmission mechanism according to some example embodiments of the present disclosure.
  • the first set of resources 312 allocated from the band 310 corresponds to the original transmission occasion 302
  • the third set of resources 324 and the third set of resources 322 are allocated from the band 320 respectively correspond to the backup transmission occasion 304 and the first transmission occasion 301.
  • the first device 110 may transmit the signal including the transmission indicator on the second set of resources 322 at the first transmission occasion 301.
  • the first device 110 then performs the CCA on the first set of resources.
  • the first device 110 may perform LBT on the channel to determine whether the first set of resources is available for the data transmission.
  • the first device 110 determines 225 that the first set of resources 312 is unavailable for the data transmission. Since the second device 120 expects the data transmission at the original transmission occasion based on the signal received at the first transmission occasion 301, however, no data transmission is received on the first set of resources 312, the second device 120 may determine that the data transmission is to be transmitted on the third set of resources 324 at the backup transmission occasion 304. In such a case, the second device 120 may schedule a retransmission of the HARQ process identified in the signal on the third set of resources 324.
  • the first device 110 transmits 230 the data transmission to the second device on third set of resources 324 at the backup transmission occasion 304.
  • the third set of resources 324 may be pre-allocated by the second device 120.
  • the first device 110 upon transmitting the signal the first device 110 may start monitoring the PDCCH on specific time/frequency resources for explicit allocation of the third set of resources 324.
  • FIG. 4 shows a schematic diagram of a reliable transmission mechanism according to some example embodiments of the present disclosure.
  • the first set of resources 412 allocated from the band 410 corresponds to the original transmission occasion 402
  • the third set of resources 424 and the third set of resources 422 are allocated from the band 420 respectively correspond to the backup transmission occasion 304 and the first transmission occasion 401.
  • the first device 110 determines that the first set of resources 412 is available for the data transmission. The first device 110 may then transmit the data transmission on the first set of the resources 412 at the original transmission occasion 402. Since the second device 120 receives the data transmission on the first set of resources 412 as expected, the second device 120 may re-allocate 235 the third set of resources 424 for further transmissions.
  • time offsets 303 and 403 between the first set of resources 312, 412 and the third set of resources 324, 424 in time domain. It may be beneficial to provide such a time offset between the first set of resources and the third set of resources.
  • the time offset may be associated with the capability of the first device 110 for switching the data transmission from the first set of resources to the third set of resources, a reaction time of the second device 120 for allocating the third set of resources to first device, the packet delay budget and the like.
  • the terminal device is capable of informing the network device of an attempt of data transmission or a failure of LBT on an original band (e.g., unlicensed band) in a flexible and timely manner. Once the LBT on unlicensed band is failed, the terminal device can use backup resources allocated from a less congested band to transmit the data transmissions. Further, if the data transmissions are successfully transmitted on the original band, the network device may re-allocate the backup resources for further transmissions. In this way, the communication services requiring low latency and high reliability can be delivered on both licensed and unlicensed bands, and the spectrum efficiency can be significantly improved.
  • FIG. 5 shows a flowchart of an example method 500 of reliable transmission according to some example embodiments of the present disclosure.
  • the method 500 can be implemented at a terminal device, e.g., the first device 110 described with reference to FIG. 1.
  • the first device 110 determines whether a data transmission is to be transmitted to the second device 120.
  • the data transmission may be a UL CG transmission, a dynamically scheduled transmission or a deterministic transmission.
  • the data transmission may be one of a plurality of contiguous transmissions.
  • the first device 110 performs a transmission attempt for the data transmission on a first set of resources.
  • the first device 110 performs a CCA on the first set of resources, which may correspond to an original transmission occasion.
  • the first device 110 may perform, for example, LBT based on energy detection on the channel between the first device 110 and the second device 120.
  • the first set of resources may be configured in an UL grant for the data transmission from the second device 120.
  • the second device is aware of the data transmission to be transmitted on the first set of resources at the original transmission occasion.
  • the first device 110 transmits, at 530, a signal on a second set of resources to the second device 120.
  • the signal may indicate the transmission attempt performed by the first device 110.
  • the signal may include but not limited to a reference signal, a preamble signal, a SR signal or UCI.
  • the second set of resources may be pre-configured by the second device 120.
  • the first device 110 may further receive a first configuration of the signal from the second device 120.
  • the first configuration may indicate at least a second set of resources for the signal.
  • the second set of resources may correspond to a first transmission occasion different from the original transmission occasion for the first set of resources.
  • the second set of resources may be allocated from an unlicensed spectrum or a licensed spectrum.
  • the first configuration may indicate that the signal is associated with a first channel with a predetermined priority.
  • the signal is associated with a plurality of data transmissions on contiguous resources comprising the first set of resources.
  • the second device 120 is aware of the data transmission to occur at the original transmission occasion without any explicit signal or indicator from the first device 110.
  • the first device 110 determines if the transmission attempt is failed.
  • a failure of the transmission attempt may indicate that the channel is busy, or the first set of resources is unavailable for the data transmission.
  • the first device 110 determines a failure of the transmission attempt, at 550, the first device 110 transmits the data transmission on a third set of resources to the second device120.
  • the first device 110 may switch the data transmission from the first set of resources to the third set of resources, which is allocated by the second device 120 as backup resources for the data transmission.
  • the third set of resources may correspond to a backup transmission occasion later than the original occasion.
  • the first device 110 may receive a first RRC message for configuring the third set of resources from the second device 120.
  • the first RRC message may further configure the first set of resources.
  • the first set of resources and the third set of resources may be configured in separate RRC messages.
  • the first RRC message is different from a second RRC message received from the second device 120 for configuring the first set of resources.
  • the first device 110 may start monitoring the PDCCH on specific time/frequency resources for allocation of the third set of resources for the data transmission. In this case, the first device 110 may further receive a transmission configuration indicating at least the third set of resources for the data transmission.
  • the transmission configuration for the third set of resources may be transmitted together with or separately from the transmission configuration for the first set of resources.
  • both the first and third sets of resources are indicated in first DCI from the second device 120.
  • the third set of resources may be indicated in the first DCI, while the first set of resources may be in second DCI that is different from the first DCI.
  • the second set of resources and the third set of resources may be allocated from a same frequency band, for example, the licensed band.
  • the first device 110 may transmit a further signal indicating the failure of the transmission attempt to the second device 120. In these embodiments, the first device 110 may further receive a second configuration of the further signal from the second device 120.
  • the second configuration may indicate at least resources for the further signal, which may correspond to a second transmission occasion before the original transmission occasion.
  • the resources for the further signal may be allocated from an unlicensed spectrum or a licensed spectrum.
  • the further signal may include but not limited to a reference signal, a preamble signal, a SR signal or UCI.
  • the signal may further indicate a first HARQ process number for the data transmission on the first set of resources.
  • the signal may further indicate a second HARQ process number for the data transmission on the second set of resources, and the second HARQ process number is different from the first HARQ process number.
  • the first device 110 may select the indicator indicating further information about the data transmission from the plurality of candidate signa indicators. For example. if the transmission configuration may be used for HPN 1 and HPN 2, the first device 110 may select a first indicator in case of attempting the data transmission for HPN 1, and a second indicator in case of attempting the data transmission for HPN 2.
  • the first device 110 may determine that the first set of resources is available for the data transmission. In this case, the first device 110 may transmit the data transmission on the first set of the resources 412 at the original transmission occasion. Since the second device 120 receives the data transmission on the first set of resources as expected, the second device 120 may re-allocate the third set of resources for further transmissions.
  • time offset there is a time offset between the first set of resources and the second set of resources in time domain. It may be beneficial to provide such a time offset between the first set of resources and the second set of resources.
  • the time offset may be associated with the capability of the first device 110 for switching the data transmission from the first set of resources to the second set of resources, a reaction time of the second device 120 for allocating the second set of resources to first device, the packet delay budget and the like.
  • a reliable transmission mechanism By providing the backup resources in a less congested band, for example, the licensed band, the latency and reliability requirements of data transmission can be met, even if the LBT is failed on the original band.
  • FIG. 6 shows a flowchart of an example method 600 of reliable transmission according to some example embodiments of the present disclosure.
  • the method 600 can be implemented at a network device, e.g., the second device 120 described with reference to FIG. 1.
  • the second device 120 receives, from the first device 110, a signal on a second set of resources.
  • the signal may indicate a transmission attempt performed by the first device 110, and the transmission attempt is performed for a data transmission to be transmitted on a first set of resources.
  • the second device 120 is aware of the data transmission to be transmitted.
  • the second device 120 may allocate the first set of resources for the data transmission.
  • the first set of resources may correspond to an original transmission occasion.
  • the data transmission may be a UL CG transmission, a dynamically scheduled transmission or a deterministic transmission.
  • the data transmission may be one of a plurality of contiguous transmissions.
  • the second device 120 may transmit the UL grant for the data transmission which indicates the first set of resources.
  • the second device 120 may configure the first set of resources in a RRC message.
  • the second device 120 may transmit the first device 110 downlink control information indicating the first set of resources.
  • the second device 120 may transmit a first configuration of the signal to the first device 110.
  • the first configuration may indicate at least the second set of resources for the signal, and the second set of resources is allocated from an unlicensed spectrum or a licensed spectrum.
  • the signal may include but not limited to a reference signal, a preamble signal, a SR signal or UCI.
  • the UCI may be transmitted on, for example, the physical uplink control channel (PUCCH) that is configured on the licensed band by the second device 120.
  • PUCCH physical uplink control channel
  • the signal may not present.
  • the second device 120 is aware of the data transmission to occur at the original transmission occasion without any signal or indicator from the first device 110.
  • the second device 120 determines whether the data transmission is transmitted on the first set of resources.
  • the second device 120 may perform a reference signal detection on the first set of resources.
  • the second device 120 may perform a Demodulation Reference Signal (DMRS) detection on the first set of resources, to determine whether the data transmission is transmitted on the first set of resources.
  • DMRS Demodulation Reference Signal
  • the second device 120 may receive a further signal from the first device 110 for indicating a failure of the transmission attempt performed by the first device 110.
  • the second device 120 may further transmit the second configuration indicating at least resources for the further signal.
  • the resources may be allocated from an unlicensed spectrum or a licensed spectrum.
  • the second device 120 may determine that no data transmission is transmitted on the first set of resources.
  • the second device 120 may determine whether the first of the consecutive resources is detected upon receipt of the signal.
  • the second device 120 determines that no data transmission is received on the first set of resources, at 630, the second device 120 receives the data transmission on a third set of resources from the first device 110.
  • the third set of resources is different from the first set of resources.
  • the third set of resources and the second set of resources may be allocated from a same frequency band.
  • the second device 120 may transmit a first RRC message for configuring the third set of resources to the first device 110.
  • the first RRC may further configure the first set of resources.
  • the second device 120 may transmit a second RRC message to the first device 110 for configuring the first set of resources.
  • the first RRC is different from the second RRC.
  • the second device 120 may transmit first DCI to the first device 110.
  • the first DCI may indicate the third set of resources.
  • the first set of resources may be indicated in a same DCI or a different DCI.
  • the first DCI may further indicate the first set of resources.
  • the second device 120 may further transmit second DCI for indicating the first set of resources.
  • the first set of resources may be allocated from a unlicensed spectrum, while the third set of resources may be allocated from a further unlicensed spectrum or a licensed spectrum.
  • time offset between the first set of resources and the third set of resources in time domain.
  • the time offset may be associated with, for example, a capability of the first device for switching the data transmission from the first set of resources to the second set of resources, or a reaction time of the second device for allocating the third set of resources to first device.
  • thesignal may further indicate a first HARQ process number for the data transmission on the first set of resources.
  • the signal may further indicate a second HARQ process number for the data transmission on the second set of resources, and the second HARQ process number is different from the first HARQ process number.
  • the second device 120 may determine that the signal indicates a first HPN for the data transmission on the first set of resources. In this case, the second device 120 may schedule a retransmission of the data transmission on the second set of resources.
  • the second device 120 may determine that the signal indicates a second HPN for the data transmission on the second set of resources. In this case, the second device 120 may schedule a retransmission of the data transmission on the third set of resources, and the second HPN is different from the first HPN for the data transmission on the first set of resources.
  • the data transmission can be transmitted successfully with a low cost of signalling and the latency and reliability requirements for data transmission can be met.
  • a first apparatus capable of performing the method 500 may comprise means for performing the respective steps of the method 500.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • the first apparatus may be implemented as or included in the first device 110.
  • the means may comprise at least one processor and at least one memory including computer program code. The at least one memory and computer program code are configured to, with the at least one processor, cause performance of the first apparatus.
  • the first apparatus comprises: means for in accordance with a determination that a data transmission is to be transmitted to a second apparatus, performing, at the first apparatus, a transmission attempt for the data transmission on a first set of resources; means for transmitting, on a second set of resources, a signal to the second apparatus, the signal indicating the transmission attempt performed by the first apparatus, the second set of resources being different from the first set of resources; and means for in accordance with a failure of the transmission attempt, transmitting, to the second apparatus, the data transmission on a third set of resources different from the first set of resources.
  • the first apparatus further comprises: means for receiving, from the second apparatus, a first radio resource control message for configuring the third set of resources.
  • the first radio resource control message further configures the first set of resources.
  • the first radio resource control message is different from a second radio resource control message received from the second apparatus for configuring the first set of resources.
  • the first apparatus further comprises: means for receiving, to the second apparatus, first downlink control information indicating the third set of resources.
  • the first downlink control information further indicates the first set of resources.
  • the first downlink control information is different from second downlink control information received from the second apparatus for indicating the first set of resources.
  • the first apparatus further comprises: means for receiving, from the second apparatus, a first configuration of the signal, the first configuration indicating at least the second set of resources for the signal, the second set of resources allocated from an unlicensed spectrum or a licensed spectrum.
  • the first configuration indicates that the signal is associated with a first channel with a predetermined priority.
  • the signal is associated with a plurality of data transmissions on contiguous resources comprising the first set of resources.
  • the signal comprises one of the following: a reference signal, a preamble signal, a scheduling request signal or uplink control information.
  • the signal further comprises a transmission indicator indicating at least one of: a first hybrid automatic repeat request, HARQ, process number for the data transmission on the first set of resources, or a second HARQ process number for the data transmission on the third set of resources, the second HARQ process number being different from the first HARQ process number.
  • a transmission indicator indicating at least one of: a first hybrid automatic repeat request, HARQ, process number for the data transmission on the first set of resources, or a second HARQ process number for the data transmission on the third set of resources, the second HARQ process number being different from the first HARQ process number.
  • the first apparatus further comprises: means for selecting, from a plurality of candidate indicators, the transmission indicator indicating a corresponding one of the first and second HARQ process numbers for the data transmission; and means for transmitting, to the second apparatus, the signal comprising the transmission indicator.
  • the first set of resources is allocated from an unlicensed spectrum
  • the third set of resources is allocated from one of another unlicensed spectrum or a licensed spectrum.
  • a time offset is between the first set of resources and the third set of resources in time domain, and the time offset is associated with at least one of: a capability of the first apparatus for switching the data transmission from the first set of resources to the third set of resources, or a reaction time of the second apparatus for allocating the third set of resources to first apparatus.
  • the first apparatus comprises a terminal device
  • the second apparatus comprises a network device
  • a second apparatus capable of performing the method 600 may comprise means for performing the respective steps of the method 600.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • the second apparatus may be implemented as or included in the second device 120.
  • the means may comprise at least one processor and at least one memory including computer program code. The at least one memory and computer program code are configured to, with the at least one processor, cause performance of the second apparatus.
  • the second apparatus comprises: means for receiving, at a second apparatus and from a first apparatus, a signal on a second set of resources, the signal indicating a transmission attempt performed by the first apparatus, the transmission attempt performed for a data transmission to be transmitted on a first set of resources; means for in accordance of the receipt of the signal, determining whether the data transmission is transmitted on the first set of resources; and means for in accordance with a determination that no data transmission is received on the first set of resources, receiving, from the first apparatus, the data transmission on a third set of resources different from the first set of resources.
  • the second apparatus further comprises: means for transmitting, to the first apparatus, a first radio resource control message for configuring the third set of resources.
  • the first radio resource control message further configures the first set of resources.
  • the second apparatus further comprises: means for transmitting, to the first apparatus, a second radio resource control message for configuring the first set of resources, the second radio resource control message being different from the first radio resource control message.
  • the second apparatus further comprises: means for transmitting, to the first apparatus, first downlink control information indicating the third set of resources.
  • the first downlink control information further indicates the first set of resources.
  • the second apparatus further comprises: means for transmitting, to the first apparatus, second downlink control information indicating the first set of resources, the second downlink control information being different from the first downlink control information.
  • the second apparatus further comprises: means for transmitting, to the first apparatus, a first configuration of the signal, the first configuration indicating at least the second set of resources for the signal, the second set of resources allocated from an unlicensed spectrum or a licensed spectrum.
  • the signal is associated with a plurality of data transmissions on contiguous resources comprising the first set of resources.
  • the signal further comprises a transmission indicator indicating at least one of: a first hybrid automatic repeat request, HARQ, process number for the data transmission on the first set of resources and a second HARQ process number for the data transmission on the third set of resources, the second HARQ process number being different from the first HARQ process number.
  • a transmission indicator indicating at least one of: a first hybrid automatic repeat request, HARQ, process number for the data transmission on the first set of resources and a second HARQ process number for the data transmission on the third set of resources, the second HARQ process number being different from the first HARQ process number.
  • the second apparatus further comprises: means for scheduling, based on a corresponding one of the first and second HARQ process numbers, a retransmission of the data transmission on the third set of resources.
  • the signal comprises one of the following: a reference signal, a preamble signal, a scheduling request signal or uplink control information.
  • the second apparatus further comprises: means for performing a reference signal detection on the first set of resources.
  • the first set of resources is allocated from an unlicensed spectrum
  • the third set of resources is allocated from one of another unlicensed spectrum or a licensed spectrum.
  • a time offset is between the first set of resources and the third set of resources in time domain, and the time offset is associated with at least one of: a capability of the first apparatus for switching the data transmission from the first set of resources to the third set of resources, or a reaction time of the second apparatus for allocating the third set of resources to first apparatus.
  • the first apparatus comprises a terminal device
  • the second apparatus comprises a network device
  • FIG. 7 is a simplified block diagram of a device 700 that is suitable for implementing embodiments of the present disclosure.
  • the device 700 may be provided to implement the communication device, for example the first device 110 or the second device as shown in FIG. 1.
  • the device 700 includes one or more processors 710, one or more memories 720 coupled to the processor 710, and one or more transmitters and receivers (TX/RX) 740 coupled to the processor 710.
  • TX/RX transmitters and receivers
  • the TX/RX 740 is for bidirectional communications.
  • the TX/RX 740 has at least one antenna to facilitate communication.
  • the communication interface may represent any interface that is necessary for communication with other network elements.
  • the processor 710 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 700 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • the memory 720 may include one or more non-volatile memories and one or more volatile memories.
  • the non-volatile memories include, but are not limited to, a Read Only Memory (ROM) 724, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , and other magnetic storage and/or optical storage.
  • the volatile memories include, but are not limited to, a random access memory (RAM) 722 and other volatile memories that will not last in the power-down duration.
  • a computer program 730 includes computer executable instructions that are executed by the associated processor 710.
  • the program 730 may be stored in the ROM 720.
  • the processor 710 may perform any suitable actions and processing by loading the program 730 into the RAM 720.
  • the embodiments of the present disclosure may be implemented by means of the program 730 so that the device 700 may perform any process of the disclosure as discussed with reference to FIGs. 2 and 5-6.
  • the embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
  • the program 730 may be tangibly contained in a computer readable medium which may be included in the device 700 (such as in the memory 720) or other storage devices that are accessible by the device 700.
  • the device 700 may load the program 730 from the computer readable medium to the RAM 722 for execution.
  • the computer readable medium may include any types of tangible non-volatile storage, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like.
  • FIG. 8 shows an example of the computer readable medium 800 in form of CD or DVD.
  • the computer readable medium has the program 730 stored thereon.
  • various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, device, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium.
  • the computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the methods 500 and 600 as described above with reference to FIGs. 5-6.
  • program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types.
  • the functionality of the program modules may be combined or split between program modules as desired in various embodiments.
  • Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing device, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the computer program codes or related data may be carried by any suitable carrier to enable the device, device or processor to perform various processes and operations as described above.
  • Examples of the carrier include a signal, computer readable medium, and the like.
  • the computer readable medium may be a computer readable signal medium or a computer readable storage medium.
  • a computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

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Abstract

Des modes de réalisation donnés à titre d'exemple de la présente divulgation concernent des dispositifs, des procédés, des appareils et des supports de stockage lisibles par ordinateur de transmission fiable. Le procédé comprend : conformément à une détermination établissant qu'une transmission de données est à transmettre à un second dispositif, la réalisation d'une tentative de transmission pour la transmission de données sur un premier ensemble de ressources ; la transmission, sur un deuxième ensemble de ressources, d'un signal au second dispositif, le signal indiquant la tentative de transmission réalisée par le premier dispositif, le deuxième ensemble de ressources étant différent du premier ensemble de ressources ; et en fonction d'un échec de la tentative de transmission, la transmission, au second dispositif, de la transmission de données sur un troisième ensemble de ressources différent du premier ensemble de ressources. Ainsi, le spectre sans licence peut être utilisé pour transmettre des données URLLC, en même temps que les exigences de latence et de fiabilité sont satisfaites en utilisant un spectre sous licence en tant que ressources d'appoint pour les données URLLC.
PCT/CN2021/085535 2021-04-06 2021-04-06 Transmission fiable sur des bandes sous licence et sans licence WO2022213238A1 (fr)

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