WO2020029070A1 - Procédé, appareil et supports lisibles par ordinateur pour le traitement d'images - Google Patents

Procédé, appareil et supports lisibles par ordinateur pour le traitement d'images Download PDF

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Publication number
WO2020029070A1
WO2020029070A1 PCT/CN2018/099172 CN2018099172W WO2020029070A1 WO 2020029070 A1 WO2020029070 A1 WO 2020029070A1 CN 2018099172 W CN2018099172 W CN 2018099172W WO 2020029070 A1 WO2020029070 A1 WO 2020029070A1
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WIPO (PCT)
Prior art keywords
resource
uplink transmission
signaling
transmission
scheduled
Prior art date
Application number
PCT/CN2018/099172
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English (en)
Inventor
Tao Tao
Zhe LUO
Kari Hooli
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 CN201880096411.1A priority Critical patent/CN112544103A/zh
Priority to PCT/CN2018/099172 priority patent/WO2020029070A1/fr
Publication of WO2020029070A1 publication Critical patent/WO2020029070A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • 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

  • Non-limiting and example embodiments of the present disclosure generally relate to a technical field of wireless communication, and specifically to methods, apparatuses and computer program products for resource allocation in a wireless communication system.
  • a terminal device transmits uplink (UL) traffic to a network device, and/or receives downlink (DL) traffic from the network device.
  • UL uplink
  • DL downlink
  • both the uplink communication and downlink communication between the terminal device and the network device are controlled via scheduling information from the network device. For example, the network device allocates resources to be used for UL and DL communication with a terminal device.
  • a resource for UL or DL transmission may be dynamically configured via a physical layer signaling.
  • LTE Long Term Evolution
  • NR New Radio
  • 3GPP Third Generation Partnership Project
  • UL transmissions that are scheduled by the network device in a persistent or semi-persistent manner (i.e., not dynamically) in preconfigured resources, and such UL transmissions may be referred to as pre-scheduled UL transmissions herein.
  • Various embodiments of the present disclosure mainly aim at providing methods, apparatuses and computer program products for resource allocation in a wireless communication system.
  • a method implemented at a network device comprises configuring a first resource for a pre-scheduled uplink transmission from a first terminal device to the network device; allocating a second resource for the pre-scheduled uplink transmission, the second resource replacing the first resource; and receiving the pre-scheduled uplink transmission from the first terminal device at least in the second resource.
  • the second resource replaces the first resource
  • the method may further comprise allocating the first resource for at least one of a downlink transmission, and an uplink transmission from a second terminal device.
  • the pre-scheduled uplink transmission may comprise at least one of: a scheduling request transmission, a random access preamble transmission, a semi-persistent-scheduling (SPS) uplink transmission, and an autonomous uplink transmission.
  • a scheduling request transmission a random access preamble transmission
  • a semi-persistent-scheduling (SPS) uplink transmission may comprise at least one of: a scheduling request transmission, a random access preamble transmission, a semi-persistent-scheduling (SPS) uplink transmission, and an autonomous uplink transmission.
  • SPS semi-persistent-scheduling
  • the method may further comprise: transmitting, at least to the first terminal device, an indication as to whether the first resource is recalled.
  • the indication may be transmitted via a slot format indicator in a physical downlink control channel.
  • allocating the second resource may comprise transmitting a signaling to the first terminal device, and the signaling indicates at least one of: a location for the second resource, and an offset for the second resource relative to a predetermined reference resource.
  • the predetermined reference resource may comprise one of: a resource configured via a signaling, the first resource, a transmission opportunity included in the first resource, and a resource for transmitting the signaling.
  • the offset may include a timing offset.
  • the offset may include a common offset for a plurality of uplink transmission opportunities included in the second resource, or, an offset for each of the plurality of uplink transmission opportunities included in the second resource respectively.
  • the plurality of uplink transmission opportunities may comprise transmission opportunities for different types of UL transmissions.
  • transmitting the signaling may comprise transmitting the signaling in a configured time window.
  • the time window may be configured via a signaling or a predefinition.
  • the time window may be configured relative to the first resource.
  • the signaling may be transmitted for a plurality of times.
  • an apparatus for resource allocation 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 apparatus at least to: configure a first resource for a pre-scheduled uplink transmission from a first terminal device to the apparatus; allocate a second resource for the pre-scheduled uplink transmission, the second resource replacing the first resource; and receive the pre-scheduled uplink transmission from the first terminal device at least in the second resource.
  • the method may be implemented by a terminal device.
  • the method comprises: receiving, from a network device, a configuration of a first resource for a pre-scheduled uplink transmission; detecting availability of the first resource for the pre-scheduled uplink transmission; receiving a signaling from the network device, the signaling indicating an allocation of a second resource for the pre-scheduled uplink transmission, the second resource replacing the first resource; and performing the pre-scheduled uplink transmission at least in the second resource, based on the detected availability of the first resource.
  • an apparatus for communication 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 apparatus at least to: receive, from a network device, a configuration of a first resource for a pre-scheduled uplink transmission; detect availability of the first resource for the pre-scheduled uplink transmission; receive a signaling from the network device, the signaling indicating an allocation of a second resource for the pre-scheduled uplink transmission, the second resource replacing the first resource; and perform the pre-scheduled uplink transmission at least in the second resource, based on the detected availability of the first resource.
  • an apparatus for resource allocation comprises means for configuring a first resource for a pre-scheduled uplink transmission from a first terminal device to the apparatus; means for allocating a second resource for the pre-scheduled uplink transmission, the second resource replacing the first resource; and means for receiving the pre-scheduled uplink transmission from the first terminal device at least in the second resource.
  • an apparatus for communication comprises: means for receiving from a network device a configuration of a first resource for a pre-scheduled uplink transmission, means for detecting availability of the first resource for the pre-scheduled uplink transmission; means for receiving a signaling from the network device, the signaling indicating an allocation of a second resource for the pre-scheduled uplink transmission, the second resource replacing the first resource; and means for performing the pre-scheduled uplink transmission at least in the second resource, based on the detected availability of the first resource.
  • the computer program comprises instructions which, when executed by an apparatus, causes the apparatus to carry out the method according to the first or third aspect of the present disclosure.
  • a computer readable medium with a computer program stored thereon which, when executed by an apparatus, causes the apparatus to carry out the method of the first or third aspect of the present disclosure.
  • FIG. 1 illustrates an example communication network in which embodiments of the present disclosure may be implemented
  • FIG. 2 shows an example of resource allocation for a pre-scheduled UL transmission
  • FIG. 3 shows a flowchart of a method for resource allocation according to an embodiment of the present disclosure
  • FIG. 4 shows an example of an resource offset valid for a plurality of slots according to an embodiment of the present disclosure
  • FIG. 5 shows an example of separate resource offsets for each slot according to an embodiment of the present disclosure
  • FIG. 6 shows another example of resource allocation for a pre-scheduled UL transmission according to an embodiment of the present disclosure
  • FIG. 7 shows a flowchart of another method for communication according to an embodiment of the present disclosure.
  • FIG. 8 shows examples of a time window for signaling detection according to embodiments of the present disclosure.
  • FIG. 9 shows a simplified block diagram of an apparatus that may be embodied as/in a network device or a terminal device.
  • references in the specification 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 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.
  • first and second etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments.
  • the term “and/or” includes any and all combinations of one or more of the listed terms.
  • 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 computing device.
  • wireless communication system refers to a system following any suitable wireless communication standards, such as New Radio (NR) , Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , and so on.
  • NR New Radio
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • wireless communication system may also be referred to as a “wireless communication network.
  • communications between network devices, between a network device and a terminal device, or between terminal devices in the wireless communication network may be performed according to any suitable communication protocol, including, but not limited to, Global System for Mobile Communications (GSM) , Universal Mobile Telecommunications System (UMTS) , LTE, NR, wireless local area network (WLAN) standards, such as the IEEE 802.11 standards, and/or any other appropriate wireless communication standard either currently known or to be developed in the future.
  • GSM Global System for Mobile Communications
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • NR wireless local area network
  • IEEE 802.11 wireless local area network
  • the term “network device” refers to a node in a wireless 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 NB, a next generation NB (also referred to as a 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.
  • BS base station
  • AP access point
  • NodeB or NB node B
  • eNodeB or eNB evolved NodeB
  • NR NB NR NB
  • a next generation NB also referred to as
  • terminal device refers to any end device capable of wireless communications.
  • 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) and the like.
  • the terms “terminal device” , “communication device” , “terminal” , “user equipment” and “UE” may be used interchangeably.
  • a terminal device may represent a machine or other device that performs monitoring and/or measurements, and transmits the results of such monitoring and/or measurements to another terminal device and/or network equipment.
  • the terminal device may in this case be a machine-to-machine (M2M) device, which may in a 3GPP context be referred to as a machine-type communication (MTC) device.
  • M2M machine-to-machine
  • MTC machine-type communication
  • the terminal device may be a UE implementing the 3GPP narrow band intemet of things (NB-IoT) standard. Examples of such machines or devices are sensors, metering devices such as power meters, industrial machinery, or home or personal appliances, for example refrigerators, televisions, personal wearables such as watches etc.
  • a terminal device may represent a vehicle or other equipment that is capable of monitoring and/or reporting on its operational status or other functions associated with its operation.
  • a DL transmission refers to a transmission from a network device to UE
  • an UL transmission refers to a transmission in an opposite direction.
  • FIG. 1 illustrates an example wireless communication system 100 in which embodiments of the present disclosure may be implemented.
  • the wireless communication system 100 may include one or more network devices, for example, network device 101.
  • the network device 101 may be in a form of a BS, a NB, an eNB, a gNB, a virtual BS, a Base Transceiver Station (BTS) , or a Base Station Subsystem (BSS) , AP and the like.
  • BTS Base Transceiver Station
  • BSS Base Station Subsystem
  • network device 101 provides radio connectivity to a set of terminal devices 102, 103, and 104 within its coverage. It should be appreciated that in some embodiments, the network device may provide service to less or more terminal devices and the number of terminal devices shown in this example does not suggest any limitations as to the scope of the present disclosure.
  • a network device may control resource allocation for both UL and DL transmissions.
  • Some UL transmission may be dynamically scheduled, e.g., via a physical layer signaling, while others may be scheduled in a persistent or semi-persistent manner. The latter is also referred to as pre-scheduled UL transmissions herein.
  • the pre-scheduled UL transmissions may include, for example, periodic UL signalling, semi-persistent (SPS) UL signaling and quasi-periodic UL signaling, etc.
  • Autonomous UL (AUL) transmission in the further evolved Licensed Assisted Access (feLAA) scenario may also be considered as an example of the pre-scheduled UL transmissions.
  • AUL includes grant-less UL transmission and UL transmission with a configured grant.
  • a resource allocation for such a pre-scheduled UL transmission (including signaling or data) may be pre-configured by a network device via a higher layer signaling, e.g., a radio resource control (RRC) signaling.
  • RRC radio resource control
  • a UE may be configured a set of configurations for a scheduling request (SR) transmission in a physical uplink control channel (PUCCH) with either PUCCH format 0 or PUCCH format 1 via a higher layer parameter SchedulingRequestResource-Config.
  • SR scheduling request
  • PUCCH physical uplink control channel
  • SchedulingRequestResource-Config a periodicity SRP ERIODICITY in symbols and an offset SR OFFSET in slots to be used for a PUCCH transmission conveying the SR are configured for the UE via a further higher layer parameter periodicityAndOffset.
  • one bitmap (including 40bits) per Secondary cell (Scell) is introduced to indicate subframes applicable for AUL transmissions.
  • the bitmap is configured by a RRC signaling. It means that potential AUL locations are pre-configured within a 40 ms (i.e. 40 subframes) periodicity.
  • Inventors of the present disclosure realized that some advanced features supported in the wireless communication system may bring a challenge to current resource allocation mechanism for pre-scheduled UL transmissions.
  • the NR system allows the operators to augment their service offering by utilizing unlicensed spectrum.
  • the NR system operated in unlicensed spectrum is also referred as a NR-U system.
  • the unlicensed spectrum may be utilized in a Licensed Assisted Access (LAA) mode or a standalone mode, and the latter is to be adopted in a future release (e.g., version 2.0) of the MulteFire (MF) technique.
  • LAA Licensed Assisted Access
  • MF MulteFire
  • a listen before talk (LBT) operation is mandatory subject to regulatory requirements in some regions.
  • the LBT operation may cause some preconfigured/pre-allocated resource for a pre-scheduled UL transmission unavailable.
  • FIG. 2 shows an example of pre-scheduled UL transmission in unlicensed spectrum.
  • the resources 201, 202 and 203 with a period of 10 ms are configured by a gNB for a pre-scheduled UL signalling transmission.
  • the gNB has to stop a DL transmission (e.g., in resource 211) before a transmission opportunity (e.g., in resource 202) for a potential pre-scheduled UL, and then resume the DL transmission (e.g., in resource 212) after that.
  • a short UL burst e.g., in resource 202 may be inserted between two continuous DL transmissions (e.g., in resources 211 and 212) .
  • Inserting such a short UL burst may not be a big issue in a licensed band scenario, but may cause problem in an unlicensed band.
  • existence of the UL resource 202 causes two gaps 221 and 222 in a continuous DL transmission in a channel occupancy time (COT) .
  • COT channel occupancy time
  • the gaps provide an opportunity for other nodes to grab the channel. This may result in interference. Therefore, in some cases, it may be beneficial if the gNB could “override” the pre-defined UL resource for DL transmission.
  • a very flexible DL/UL configuration which allows any subframe to be configured as a DL subframe or a UL subframe, is introduced in LAA.
  • a highly flexible DL/UL configuration for TDD system is also supported in NR, in order to achieve high frame structure flexibility and facilitate URLLC type of traffic. How to improve transmission efficiency and latency performance of a pre-scheduled UL transmission in a communication system supporting such a flexible DL/UL configuration is still open.
  • a transmission of a pre-scheduled UL signaling is not deterministic. For example, UE may only transmit a SR when new traffic comes to its buffer. In current LTE system, the network has to reserve resources to support such uncertain pre-scheduled UL transmission, which means potential resource waste.
  • a gNB may create a gap for an UL resource in middle of a DL transmission burst, as shown in the example of FIG. 2, however, in the end, there may be no UL signals to be transmitted in the reserved UL resource.
  • the gNB is allowed to “override” the pre-defined UL resource for DL transmission in some situations. For instance, if a network is short of capacity for scheduled transmissions, the gNB may prioritize a (DL or UL) service with traffic already in buffer over a non-deterministic pre-scheduled UL signaling.
  • the gNB may prioritize the URLLC transmission by overriding an UL resource for a pre-scheduling UL transmission.
  • a pre-configured UL resource is overlapped with a more important DL broadcast signaling (e.g., secondary system block (SSB) , physical broadcast channel (PBCH) or remaining main system information (RMSI) )
  • SSB secondary system block
  • PBCH physical broadcast channel
  • RMSI remaining main system information
  • a resource for a pre-scheduled UL transmission (which may also be referred to as a pre-scheduled UL resource) may be “overridden” by the network in some scenarios.
  • the overriding of the UL resource may cause a performance degradation of the pre-scheduled UL transmission.
  • the pre-scheduled UL resource becomes unavailable (e.g., overridden by the gNB)
  • UE has to wait till next pre-scheduled occasion for the pre-scheduled transmission.
  • next pre-scheduled transmission occasion may also be overridden by the gNB or occupied by another system, which makes the performance (e.g., latency) of the pre-scheduled transmission (e.g., PRACH, or SR) even worse.
  • performance e.g., latency
  • PRACH physical random access channel
  • SR SR
  • one possible way is to configure/reserve more resources, e.g., a large time window, for pre-scheduled UL transmission.
  • resources e.g., a large time window
  • UE may continue competing for channel access and perform the pre-scheduling transmission (e.g., SR or PRACH transmission) using another transmission occasion within the large time window.
  • pre-scheduling transmission e.g., SR or PRACH transmission
  • a new framework for allocating resource for pre-scheduled UL transmissions are proposed.
  • performance e.g., latency
  • performance impact caused by the potential unavailability of preconfigured pre-scheduled resource is minimized. This in turn makes overriding of the pre-scheduled UL transmission occasions more feasible, hence, facilitating more flexible and efficient operation of NR unlicensed system.
  • a network device allocates a temporal time resource for a pre-scheduled UL transmission when a preconfigured resource for the pre-configured UL transmission is determined to be unavailable, or when there is a high possibility for the preconfigured resource to be unavailable. For example, if the network device decides to override a preconfigured resource for a pre-scheduled UL transmission so as to transmit an important DL broadcast signaling, the network device may allocate another resource to replace the preconfigured one for the pre-scheduled UL transmission.
  • a terminal device may check availability of a pre-scheduled UL resource, since the network device (e.g., a gNB) may override the pre-scheduled UL resource allocation for other scheduled DL or UL transmission (s) .
  • the terminal device expects and attempts to receive an allocation for a new resource (e.g., a new timing) for the pre-scheduled UL resource from the gNB, if the pre-scheduled UL resource is detected as unavailable.
  • the terminal device may attempt to receive the allocation for the new resource within one or more configured time slots, which may be prior to, later than, or at a same time slot of the previous pre-configured resource for the pre-scheduled UL transmission.
  • FIG. 3 shows a flow chart of an example method according to an embodiment of the present disclosure.
  • the method may be performed by a network device, for example, the network device 101 in FIG. 1.
  • the method 300 will be described below with reference to the network device 101 and the communication system 100 illustrated in FIG. 1; however, it should be appreciated that embodiments of the present disclosure are not limited thereto.
  • the network device 101 configures a first resource for a pre-scheduled uplink transmission from a first terminal device (e.g., terminal device 102 in FIG. 1) to the network device 101.
  • a first terminal device e.g., terminal device 102 in FIG. 1
  • the pre-scheduled uplink transmission may comprises at least one of a SR transmission, a random access (RA) preamble transmission, a semi-persistent-scheduling (SPS) uplink transmission, an AUL transmission in feLAA, a Grant-less Uplink (GUL) in MF, and other UL transmissions with configured grants in NR.
  • a SR transmission a random access (RA) preamble transmission
  • RA random access
  • SPS semi-persistent-scheduling
  • AUL transmission in feLAA a Grant-less Uplink (GUL) in MF
  • GUL Grant-less Uplink
  • the first resource may be configured in a semi-persistent manner, e.g., via a higher layer signaling.
  • the first resource may be in an unlicensed band; however, embodiments of the present disclosure are not limited thereto.
  • the first resource may comprise a resource pool for a plurality of uplink transmission opportunities.
  • the first resource may comprise a plurality of transmission opportunities for SR transmission.
  • the first resource may comprise a plurality of uplink transmission opportunities which are continuous in time.
  • the network device 101 allocates a second resource for the pre-scheduled uplink transmission.
  • the second resource is for replacing the first resource.
  • the second resource may comprise an additional resource to the first resource for the pre-scheduled uplink transmission.
  • the second resource may (but not necessarily) be in an unlicensed band.
  • the network device 101 may allocate the second resource by transmitting a signaling to the first terminal device (e.g., terminal device 102 in FIG. 1) .
  • the signaling may indicate the second resource in various ways.
  • the signaling may indicate a location (defined by time, frequency, code, etc. ) for the second resource directly, or an offset (e.g., in time, frequency, and/or code) for the second resource relative to a reference resource (defined by time, frequency and/or code, etc. ) .
  • the reference resource may include, but is not limited to, the first resource, or a transmission opportunity included in the first resource.
  • the reference resource may be a time slot of the first resource.
  • the reference resource may be a predefined time slot, e.g. first slot, of the first resource.
  • the reference resource may be a resource where the signaling is transmitted by the network device at block 320, e.g., a time slot for transmitting the signaling.
  • the reference resource may be configured via a signaling, e.g., a radio resource control (RRC) signaling.
  • RRC radio resource control
  • the offset indicted in the signaling transmitted at block 320 may be valid for a plurality of time intervals (TTIs) or slots. That is, the network device 101 may shift a plurality of resources to a new location via a single signaling.
  • TTIs time intervals
  • FIG. 4 shows an example of the second resource schematically.
  • the first resource 401 comprises six continuous slots
  • the network device 101 allocates the second resource 402 by indicating a common temporal timing offset valid for six slots in a signaling 403.
  • original resource 401 i.e., the first resource
  • a new resource 402 i.e., the second resource
  • the network device 101 may allocate the second resource to replace only a portion of the first resource (e.g., the first three slots of the six slots in resource 401 in FIG. 4) .
  • the second resource may not have a same size as that of the first resource.
  • the network device 101 may alternatively indicate an offset for each of a plurality of resources (e.g., slots) , or each of a plurality of transmission opportunities included in the second resource, separately, as shown in FIG. 5.
  • the network device 101 indicates a temporal timing offset (or, a location) for the second resource 511 which replaces the resource 501 via a signaling 510, and indicates a temporal timing offset (or, a location) for the second resource 512 which replaces the resource 502 via a signaling 520.
  • the pre-scheduled UL transmission may include a plurality of types of UL transmissions (e.g., SR, RA preamble, data, etc. ) .
  • the plurality of transmission opportunities in the first resource 401 in FIG. 4 may be for different types of UL transmissions.
  • the network device 101 may allocate the second resource by indicating a common temporal timing offset for the plurality of types of pre-scheduled UL transmissions.
  • the network device 101 may allocate the second resource by indicating an offset for different types of the pre-scheduled UL transmissions separately.
  • Scope of the present disclosure is not limited to any specific way for indicating the second resource to the terminal device.
  • the signaling indicating the second resource may be transmitted to the terminal device via a physical layer signaling, such as a DL control indicator (DCI) .
  • the signaling may be specific to the terminal device 102 or, specific to a group of terminal devices (e.g., terminal devices 102-104 in FIG. 1) including the terminal device 102.
  • the signaling may be transmitted in a UE-specific DCI or a group common DCI. That is, in some embodiments, the network device 101 may indicate a timing offset for the second resource to each terminal device separately, while in some other embodiments, the network device 101 may indicate a timing offset for the second resource jointly to multiple terminal devices.
  • the signaling for indicating the second resource may be carried in a reserved field (e.g., a temporal timing offset field) in a DCI (e.g., a group-common DCI) .
  • This field may be always present no matter whether the second resource is allocated.
  • a predetermined value of this field e.g., “0”
  • the signaling for allocating the second resource is transmitted in a same time slot as the first resource.
  • the signaling may be transmitted before, at, or after a transmission occasion of first resource.
  • the signaling indicating the second resource may be transmitted to the terminal device at time slot t-k, t, or t+k, where k is a positive integer.
  • the network device 101 may transmit the signaling allocating the second resource within a configured time window.
  • the time window may be configured via a signaling (e.g., a RRC signaling) or a predefinition (e.g., in a communication standard) .
  • the time window may be configured based on or relative to the first resource.
  • the time window for transmitting the signaling may include one or more time slots around the time slot of the first resource.
  • the network device 101 may repeat the transmission of the signaling for several times.
  • FIG. 6 shows an example for transmitting the signaling for allocating the second resource.
  • a plurality of periodic resources 601, 602 and 603 i.e., the first resource
  • the network device 101 transmits a DL signaling 610 to the terminal device 102 which indicates a temporal timing offset for a second resource 612 relative to the first resource 602.
  • the network device 101 receives the pre-scheduled uplink transmission from the terminal device 102 at least in the second resource.
  • the allocated second resource replaces the first resource, and therefore, the network device 101 only detects the pre-scheduled uplink transmission from the terminal device 102 in the second resource.
  • the first resource may be unavailable, e.g., occupied by another communication system, or overridden by the network device 101 for other transmissions.
  • the network device 101 may reallocate/reuse the first resource for a downlink transmission, and/or, an uplink transmission from another terminal device (e.g., terminal device 103 in FIG. 1) , as shown in block 318 in FIG. 3. For instance, the network device 101 may preconfigure, at block 310, an UL slot for a pre-scheduled UL signalling every 10ms, and then, at block 318, the network device 101 may decide to override the pre-allocated UL resource, and use it as a DL slot for transmitting DL traffic.
  • another terminal device e.g., terminal device 103 in FIG. 1
  • the network device 101 may preconfigure, at block 310, an UL slot for a pre-scheduled UL signalling every 10ms, and then, at block 318, the network device 101 may decide to override the pre-allocated UL resource, and use it as a DL slot for transmitting DL traffic.
  • the network device 101 may transmit, at least to the terminal device 102, an indication as to whether the first resource is recalled, as shown in block 315 in FIG. 3.
  • the indication enables the terminal device 102 to determine in advance whether the first resource is overridden by the network device 101, and avoid unnecessary blind detection for the allocation of the second resource.
  • the network device 101 may transmit the indication to the terminal device 102 via a slot format indicator (SFI) in a physical downlink control channel, e.g., a group common PDCCH (GC-PDCCH) .
  • SFI slot format indicator
  • GC-PDCCH group common PDCCH
  • the allocated second resource may serve as an addition to the first resource for the pre-scheduled UL transmission, and in this case, the network device 101 may receive the pre-scheduled UL transmission in both the first resource and the second resource, or the second resource only, depending on whether the first resource is available for use.
  • the second resource no matter as a replacement or an addition, increases transmission opportunity of the pre-scheduled UL transmission, and improves latency performance of the pre-scheduled UL transmission potentially.
  • FIG. 7 shows a flow chart of another example method 700 according to an embodiment of the present disclosure.
  • the method 700 may be performed by a terminal device, for example, terminal device 102, 103 or 104 in FIG. 1.
  • a terminal device for example, terminal device 102, 103 or 104 in FIG. 1.
  • the method 700 will be described below with reference to the terminal device 102 and the communication system 100 illustrated in FIG. 1; however, it should be appreciated that embodiments of the present disclosure are not limited thereto.
  • terminal device 102 receive, from a network device (e.g., network device 101 in FIG. 1) , a configuration of a first resource for a pre-scheduled uplink transmission.
  • a network device e.g., network device 101 in FIG. 1
  • the configuration of the first resource may be received, via a higher layer signaling.
  • the configuration of the first resource for an AUL transmission may be received by the terminal device 102 via a RRC signaling which may include a 40-bits bitmap to indicate a preconfigured time resource for the AUL transmission.
  • the first resource may (but not necessarily) be in an unlicensed band, in some embodiments.
  • the terminal device 102 detects availability of the first resource for the pre-scheduled uplink transmission.
  • the pre-scheduled uplink transmission may comprise one or more of a SR transmission, a RA preamble transmission, a SPS uplink transmission, an AUL transmission in feLAA, and a GUL in MF.
  • Embodiments are not limited to any specific way for detecting the availability of the first resource.
  • the terminal device 102 may detect the availability of the first resource based on an indication from the network device as to whether the first resource is recalled. The indication may be received by the terminal device 102 in a UE-specific or group-specific signaling. As an embodiment, the terminal device 102 may receive and decode a GC-PDCCH before a slot pre-configured for the pre-scheduled UL transmission.
  • a slot format indicator (SFI) in the GC-PDCCH from the network device 101 may indicate a slot format for multiple slots, and from which the terminal device 102 may acquire an indication as to whether the pre-configured UL resource is overridden or recalled by the gNB or not. If the received SFI shows that the UL slot pre-configured for the pre-scheduled UL transmission (i.e., the first resource) is set to be a DL slot, the terminal device 102 may determine that the preconfigured first resource is recalled and unavailable.
  • SFI slot format indicator
  • the terminal device 102 may perform LBT operation before transmitting on the pre-configured first resource. That is, the terminal device 102 may detect availability of the first resource via LBT. The LBT may be based for example on energy detection. If a corresponding channel is sensed to be busy, that is, energy detected on the channel exceeds a predefined, e.g., standardized, threshold, the terminal device 102 may determine that the first resource is unavailable.
  • the terminal device 102 receives, from the network device 101, a signaling indicating an allocation of a second resource for the pre-scheduled uplink transmission.
  • the second resource replaces the first resource.
  • the second resource comprises additional resource to the first resource for the pre-scheduled UL transmission.
  • the first resource may comprise a plurality of uplink transmission opportunities, and the second resource may comprise a replacement resource for one or more of the plurality of uplink transmission opportunities.
  • the second resource may be in an unlicensed frequency band; however, embodiments are not limited thereto.
  • the signaling received at block 720 may indicate a location of the second resource directly, or indicate an offset (for example, in time, frequency, or code, etc. ) of the second resource relative to a reference resource.
  • the reference resource may include one of: a resource configured via a signaling (e.g., a RRC signaling) , the first resource, a time slot of the first resource, a transmission opportunity included in the first resource, a resource where the signaling is received, or other preconfigured resource.
  • the signaling received at block 720 may indicate a temporal timing offset, and the terminal device 102 may determine that all resource configurations (e.g., frequency domain resource allocation) , except the time domain resource configuration, of the second resource is same as that of the first resource.
  • all resource configurations e.g., frequency domain resource allocation
  • the network device 101 may transmit the signaling allocating the second resource only in a predetermined time window, as described with reference to method 300.
  • the terminal device 102 may receive the signaling within the configured time window.
  • the time window may be configured via a signaling (e.g., a RRC signaling) , or a predefinition (e.g., specified in a communication standard) .
  • the time window may be configured based on or relative to the first resource.
  • the time window may include one or more time slots around the first resource.
  • FIG. 8 shows three examples 802-804 of the time window for receiving the signaling. Assuming that the first resource is in slot 801, then the predetermined time window may be before, at, or after the slot 801, as shown in FIG. 8.
  • the terminal device 102 may receive the signaling if the first resource is detected as unavailable at block 710. For instance, if the terminal device 102 performs a LBT operation at block 710, and a result of the LBT prevents a transmission in the original pre-scheduled first resource, the terminal device 102 may start to detect the signaling which indicates a temporal timing offset for a new second resource. If the terminal device 102 cannot detect such signaling in the time slot of the first resource, it may continue receiving the signaling in following several slots/symbols. In some embodiments, if terminal device 102 cannot obtain the signaling within a predetermined time window (e.g., time window 804 in FIG. 8) , it stops detection and waits for the next pre-scheduled UL resource.
  • a predetermined time window e.g., time window 804 in FIG. 8
  • embodiments are not limited to receiving the signaling, which indicates the second resource, after detecting availability of the first resource.
  • the signaling may be transmitted before a transmission occasion of the first resource, e.g., in time window 802 in FIG. 8, and in such a case, the terminal device 10 may receive the allocation signaling at block 720 of FIG. 7 prior to the detection operation at block 710.
  • the signaling received at block 720 may be a UE-specific signaling, or a signaling specific to a group of terminal devices including the terminal device 102.
  • the signaling may indicate a common temporal timing offset for different types of pre-scheduled UL transmissions, or, the signaling may indicate a resource offset for each type of pre-scheduled UL transmissions respectively.
  • the terminal device 102 performs the pre-scheduled uplink transmission at least in the second resource, based on the detected availability of the first resource. For instance, if the first resource is detected as unavailable at block 710, the terminal device 102 only performs the pre-scheduled UL transmission in the second resource. In this case, the second resource provides another transmission opportunity for the pre-scheduled UL transmission and reduces its latency.
  • the first resource is detected as available at block 710, and the terminal device 102 may perform the pre-scheduled UL transmission in both the first resource and the second resource.
  • the terminal device 102 may perform the pre-scheduled uplink transmission in the second resource by: detecting availability of a uplink transmission opportunity within the second resource via LBT, and transmitting the pre-scheduled UL transmission on the uplink transmission opportunity in response to the uplink transmission opportunity being detected as available.
  • Such embodiments may be implemented, for example, in a scenario where the second resource is in an unlicensed band.
  • Some embodiments of the present disclosure provides a low-cost solution that enables the network device 101 to prioritize DL transmission over a pre-scheduled UL transmission (e.g., signaling or data) by overriding a configured first resource with limited performance loss.
  • Some embodiments provide flexible transmission opportunity for pre-scheduled UL transmission. These embodiments are more suitable to be applied in a scenario with dynamic DL/UL configuration, e.g., in unlicensed spectrum, compared with conventional solutions.
  • the apparatus may be implemented in/as a network device, for example, network device 101 in FIG. 1.
  • the apparatus includes means for configuring a first resource for a pre-scheduled uplink transmission from a terminal device to the apparatus; means for allocating a second resource for the pre-scheduled uplink transmission, the second resource replaces the first resource or comprises an additional resource to the first resource; and means for receiving the pre-scheduled uplink transmission from the terminal device at least in the second resource.
  • the apparatus may be configured to implement method 300, and therefore relevant details provided with reference to method 300 also apply here.
  • Some embodiments of the present disclosure provide another apparatus which may be implemented in/as a terminal device, for example one of terminal devices 102-104 in FIG. 1.
  • the apparatus includes means for receiving from a network device a configuration of a first resource for a pre-scheduled uplink transmission; means for detecting availability of the first resource for the pre-scheduled uplink transmission; means for receiving a signaling from a network device, the signaling indicates an allocation of a second resource for the pre-scheduled uplink transmission, and the second resource replaces or comprises an additional resource to the first resource; and means for performing the pre-scheduled uplink transmission at least in the second resource, based on the detected availability of the first resource.
  • the apparatus may be configured to implement method 700, and therefore relevant details provided with reference to method 700 also apply here.
  • FIG. 9 illustrates a simplified block diagram of a further apparatus 900 that may be embodied in/as a network device (e.g., the network device 101 in FIG. 1) or a terminal device (e.g., UE 102, 103 or 104 in FIG. 1) .
  • the apparatus may be used for resource allocation in a wireless communication system.
  • apparatus 900 comprises a processor 910 which controls operations and functions of apparatus 900.
  • the processor 910 may implement various operations by means of instructions 930 stored in a memory 920 coupled thereto.
  • the memory 920 may be any suitable type adapted to local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory terminal devices, magnetic memory terminal devices and systems, optical memory terminal devices and systems, fixed memory and removable memory, as non-limiting examples. Though only one memory unit is shown in FIG. 9, a plurality of physically different memory units may exist in apparatus 900.
  • the processor 910 may be any proper type adapted to local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors DSPs and processors based on multicore processor architecture, as non-limiting examples.
  • the apparatus 900 may also comprise a plurality of processors 910.
  • the processors 910 may also be coupled with a transceiver 940 which enables reception and transmission of information.
  • the processor 910 and the memory 920 can operate in cooperation to implement any of the methods 300 or 700 described with reference to FIGs. 1-8. It shall be appreciated that all the features described above with reference to FIGs. 1-8 also apply to apparatus 900, and therefore will not be detailed here.
  • Various embodiments of the present disclosure may be implemented by a computer program or a computer program product executable by one or more of the processors (for example processor 910 in FIG. 9) , software, firmware, hardware or in a combination thereof.
  • the present disclosure may also provide a carrier containing the computer program as mentioned above (e.g., computer instructions/program 930 in FIG. 9) .
  • the carrier includes a computer readable storage medium.
  • the computer readable storage medium may include, for example, an optical compact disk or an electronic memory device like a RAM (random access memory) , a ROM (read only memory) , Flash memory, magnetic tape, CD-ROM, DVD, Blue-ray disc and the like.
  • the computer readable storage medium has a computer program/instructions stored thereon which, when executed by at least one processor (e.g., processor 910 in FIG. 9) of a device, causes the device to carry out a method, for example method 300 or 700.
  • the carrier may include a transmission medium.
  • the transmission medium may include, for example, electrical, optical, radio, acoustical or other form of propagated signals, such as carrier waves, infrared signals, and the like.
  • an apparatus implementing one or more functions of a corresponding apparatus described with an embodiment comprises not only prior art means, but also means for implementing the one or more functions of the corresponding apparatus and it may comprise separate means for each separate function, or means that may be configured to perform two or more functions.
  • these techniques may be implemented in hardware (e.g., circuit or a processor) , firmware, software, or combinations thereof.
  • firmware or software implementation may be made through modules (e.g., procedures, functions, and so on) that perform the functions described herein.

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Abstract

L'invention concerne des procédés, un appareil et des produits-programmes d'ordinateur permettant d'attribuer des ressources dans un système de communcqation sans fil. Un procédé mis en œuvre dans un dispositif de réseau consiste à : configurer une première ressource pour transmission en liaison montante pré-programmée d'un premier dispositif terminal au dispositif de réseau (310); attribuer une seconde ressource pour une transmission en liaison montante pré-programmée, ladite seconde ressource remplaçant la première ressource (320); et recevoir du premier dispositif terminal la transmission en liaison montante pré-programmée au moins dans la seconde ressource (330). L'efficacité des ressources d'une communication sans fil et les performances d'une transmission en liaison montante pré-programmée peuvent être améliorées.
PCT/CN2018/099172 2018-08-07 2018-08-07 Procédé, appareil et supports lisibles par ordinateur pour le traitement d'images WO2020029070A1 (fr)

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PCT/CN2018/099172 WO2020029070A1 (fr) 2018-08-07 2018-08-07 Procédé, appareil et supports lisibles par ordinateur pour le traitement d'images

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