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WO2023245677A1 - Method, device and computer readable medium for sidelink communications - Google Patents

Method, device and computer readable medium for sidelink communications Download PDF

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Publication number
WO2023245677A1
WO2023245677A1 PCT/CN2022/101325 CN2022101325W WO2023245677A1 WO 2023245677 A1 WO2023245677 A1 WO 2023245677A1 CN 2022101325 W CN2022101325 W CN 2022101325W WO 2023245677 A1 WO2023245677 A1 WO 2023245677A1
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WIPO (PCT)
Prior art keywords
sidelink
channel resource
symbols
control channel
sub
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Ceased
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PCT/CN2022/101325
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French (fr)
Inventor
Jin Yang
Zhaobang MIAO
Gang Wang
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NEC Corp
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NEC Corp
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Priority to PCT/CN2022/101325 priority Critical patent/WO2023245677A1/en
Publication of WO2023245677A1 publication Critical patent/WO2023245677A1/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • 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
    • 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—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • Embodiments of the present disclosure generally relate to the field of telecommunication, and in particular, to a method, device and computer readable media for sidelink communications.
  • LTE Long Term Evolution
  • NR New Radio
  • the co-existence of the two radio access technologies (RATs) may be based on LTE sidelink and NR sidelink framework.
  • RATs radio access technologies
  • dynamic resource sharing scheme using overlapping resources of the two RATs needs to be specified.
  • sidelink channels and relationship between the sidelink channels may be modified.
  • example embodiments of the present disclosure provide methods, devices and computer readable media for communications.
  • a method for sidelink communications comprises: determining, at a terminal device, at least one of a third sidelink control channel resource and a third sidelink shared channel resource within a first type of sidelink resources based on at least one of the following: a configuration or pre-configuration of a first sidelink associated with a first RAT, a configuration or pre-configuration of a second sidelink associated with a second RAT, or a configuration or pre-configuration of the first type of sidelink resources, wherein the first type of sidelink resources can be used for both the first sidelink and the second sidelink; and transmitting or receiving a sidelink signal on the at least one of the third sidelink control channel resource and the third sidelink shared channel resource.
  • a terminal device comprising a processor and a memory storing instructions.
  • the memory and the instructions are configured, with the processor, to cause the terminal device to perform the method according to the first aspect.
  • a network device comprising a processor and a memory storing instructions.
  • the memory and the instructions are configured, with the processor, to cause the network device to perform the method according to the second aspect.
  • a computer readable medium having instructions stored thereon.
  • the instructions when executed on at least one processor of a device, cause the device to perform the method according to the first aspect.
  • a computer readable medium having instructions stored thereon. The instructions, when executed on at least one processor of a device, cause the device to perform the method according to the second aspect.
  • Fig. 1 illustrates an example communication network in which embodiments of the present disclosure can be implemented
  • Fig. 2 illustrates an example of a timing resource allocation in a sidelink resource pool in accordance with some embodiments of the present disclosure
  • Fig. 3 illustrates an example of a symbol allocation in a sidelink slot in accordance with some embodiments of the present disclosure
  • Fig. 4 illustrates an example of a frequency resource allocation in a sidelink resource pool in accordance with some embodiments of the present disclosure
  • Fig. 5 illustrates an example of sidelink channels in time domain in accordance with some embodiments of the present disclosure
  • Fig. 6 illustrates an example of a symbol allocation in a sidelink subframe in accordance with other embodiments of the present disclosure
  • Figs. 7A and 7B illustrate an example of a frequency resource allocation in a sidelink resource pool in accordance with other embodiments of the present disclosure, respectively;
  • Fig. 8 illustrates a flowchart of an example method in accordance with some embodiments of the present disclosure
  • Figs. 10A to 10F illustrate an example of the third sidelink control channel resource in accordance with some embodiments of the present disclosure, respectively;
  • Figs. 11A and 11B illustrate an example of the third sidelink control channel resource in accordance with some embodiments of the present disclosure, respectively;
  • Figs. 13A to 13F illustrate an example of the third sidelink shared channel resource in accordance with some embodiments of the present disclosure, respectively;
  • Fig. 15 is a simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure.
  • terminal device refers to any device having wireless or wired communication capabilities.
  • the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, device on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for Integrated Access and Backhaul (IAB) , Small Data Transmission (SDT) , mobility, Multicast and Broadcast Services (MBS) , positioning, dynamic/flexible duplex in commercial networks, reduced capability (RedCap) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eX
  • UE user equipment
  • the ‘terminal device’ can further has ‘multicast/broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM.
  • SIM Subscriber Identity Module
  • the term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
  • network device refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate.
  • a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , Network-controlled Repeaters, and the like.
  • NodeB Node B
  • eNodeB or eNB evolved NodeB
  • gNB next generation NodeB
  • TRP transmission reception point
  • RRU remote radio unit
  • RH radio head
  • RRH remote radio head
  • IAB node a low power node such
  • the terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • AI Artificial intelligence
  • Machine learning capability it generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • test equipment e.g. signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator
  • the embodiments of the present disclosure may be performed according to any generation 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, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
  • the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • the term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’
  • the term ‘based on’ is to be read as ‘at least in part based on. ’
  • the term ‘some embodiments’ and ‘an embodiment’ are to be read as ‘at least some embodiments. ’
  • the term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’
  • the terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
  • values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
  • Fig. 1 illustrates a schematic diagram of an example communication network 100 in which embodiments of the present disclosure can be implemented.
  • the communication network 100 may include a terminal device 110, a terminal device 120, a terminal device 130, network devices 140 and 150.
  • the network devices 140 and 150 may communicate with the terminal device 110, the terminal device 120 and the terminal device 130 via respective wireless communication channels.
  • the network device 140 may be a gNB in NR.
  • the network device 140 may be also referred to as an NR network device 140.
  • the communication network 100 may include any suitable number of network devices and/or terminal devices adapted for implementing embodiments of the present disclosure.
  • the communications in the communication network 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , LTE, LTE-Evolution, LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like.
  • GSM Global System for Mobile Communications
  • LTE LTE
  • LTE-Evolution LTE-Advanced
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • GERAN GSM EDGE Radio Access Network
  • MTC Machine Type Communication
  • the communications may be performed according to any generation 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)
  • data is transmitted directly from a source terminal device (such as the terminal device 110) to a target terminal device (such as the terminal device 120) through the Unified Air Interface, e.g., PC5 interface, (i.e., sidelink transmissions) , as shown in Fig. 1.
  • Unified Air Interface e.g., PC5 interface
  • Sidelink communication can provide several advantages, including reducing data transmission load on a core network, system resource consumption, transmission power consumption, and network operation costs, saving wireless spectrum resources, and increasing spectrum efficiency of a cellular wireless communication system.
  • a sidelink communication manner includes but is not limited to device to device (D2D) communication, Vehicle-to-Everything (V2X) communication, etc.
  • D2D device to device
  • V2X Vehicle-to-Everything
  • V2X communication enables vehicles to communicate with other vehicles (i.e. Vehicle-to-Vehicle (V2V) communication) , with infrastructure (i.e. Vehicle-to-Infrastructure (V2I) , with wireless networks (i.e. Vehicle-to-Network (V2N) communication) , with pedestrians (i.e. Vehicle-to-Pedestrian (V2P) communication) , and even with the owner's home (i.e. Vehicle-to-Home (V2H) ) .
  • infrastructure include roadside units such as traffic lights, toll gates and the like.
  • V2X communication can be used in a wide range of scenarios, including in accident prevention and safety, convenience, traffic efficiency and clean driving, and ultimately in relation to autonomous or self-driving vehicles.
  • Fig. 2 illustrates an example of a timing resource allocation in a sidelink resource pool in accordance with some embodiments of the present disclosure.
  • the sidelink resource pool may comprise an NR sidelink resource pool.
  • the sidelink resource pool may be defined within a sidelink bandwidth part (BWP) .
  • BWP sidelink bandwidth part
  • the terminal device 110, the terminal device 120 and the terminal device 130 may use uplink (UL) resources for sidelink communications. More than one sidelink resource pools may be configured for one of the terminal device 110, the terminal device 120 and the terminal device 130.
  • a dedicated resource pool may be used for mode 1 resource scheme or mode 2 resource scheme, short for mode 1 resource pool or mode 2 resource pool.
  • a dedicated resource pool may be used for mode 3 resource scheme or mode 4 resource scheme, short for mode 3 resource pool or mode 4 resource pool.
  • Resources within the sidelink resource pool may comprise Physical Sidelink Control Channel (PSCCH) resources, Physical Sidelink Shared Channel (PSSCH) resources and physical sidelink feedback channel (PSFCH) resources.
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSFCH physical sidelink feedback channel
  • a bitmap may be used to indicate which UL slots are configured as sidelink slots.
  • a length of the bitmap may be in a range of 10 to 160.
  • Fig. 3 illustrates an example of a symbol allocation in a sidelink slot in accordance with some embodiments of the present disclosure.
  • the sidelink resource pool which may contain multiple slots and resource blocks (RBs) , and all or part of the symbols in a slot can be used for sidelink transmission.
  • the first symbol i.e., the start symbol
  • the last symbol used as a guard period (GP) symbol.
  • AGC symbols and GP symbols can be considered as fixed overheads in sidelink resource.
  • AGC symbols and GP symbols are included in the sidelink symbols which are indicated by the sidelink channel resource configuration, and AGC symbols carry redundancy sidelink information while GP symbols are not used for carrying sidelink information, as shown in Fig. 3.
  • the terminal device 110, the terminal device 120 and the terminal device 130 may use sidelink channels to transmit sidelink signaling or information.
  • the sidelink channels include at least one of the following: a PSCCH resource which is used for carrying sidelink control information (SCI) , a PSSCH resource which is used for carrying sidelink data service information, a PSFCH resource which is used for carrying sidelink Hybrid Automatic Repeat Request (HARQ) feedback information, a physical sidelink broadcast channel (PSBCH) resource which is used for carrying sidelink broadcast information, and a physical sidelink discovery channel (PSDCH) resource which is used for carrying a sidelink discovery signal.
  • SCI sidelink control information
  • PSSCH which is used for carrying sidelink data service information
  • PSFCH resource which is used for carrying sidelink Hybrid Automatic Repeat Request (HARQ) feedback information
  • HARQ Hybrid Automatic Repeat Request
  • PSBCH physical sidelink broadcast channel
  • PSDCH physical sidelink discovery channel
  • Fig. 4 illustrates an example of a frequency resource allocation in a sidelink resource pool in accordance with some embodiments of the present disclosure.
  • the sidelink resource pool may be an NR sidelink resource pool.
  • the sidelink resource pool may be configured within a SL Bandwidth Part (Sidelink BWP) .
  • a resource pool configuration may comprise sl-StartRB-Subchannel and sl-RB-Number.
  • the sl-StartRB-Subchannel may indicate the lowest Resource Block (RB) of the resource pool.
  • the lowest RB is also referred to as a start RB.
  • the sl-RB-Number may indicate the total number of RBs of the resource pool.
  • RBs in the resource pool may be divided into consecutive sub-channels.
  • Sub-channel is a frequency resource unit of PSSCH. Each sub-channel contains consecutive RBs.
  • the terminal devices 110, 120 and 130 may use one or more consecutive sub-channels as a PSSCH resource to transmit sidelink data.
  • a sub-channel configuration of the resource pool may comprise sl-SubchannelSize which indicates the number of RBs contained in one sub-channel.
  • the SubchannelSize may be equal to 10, 12, 15, 20, 25, 50, 75 or 100.
  • the terminal device 110, the terminal device 120 or the terminal device 130 may use uplink (UL) resources for sidelink communications. More than one sidelink resource pools may be configured for the terminal device 110, the terminal device 120 or the terminal device 130.
  • Resources within the LTE sidelink resource pool may comprise a PSCCH resource pool and a PSSCH resource pool.
  • a bitmap may be used to indicate which UL subframes are configured as sidelink subframes.
  • Fig. 6 illustrates an example of a symbol allocation in a sidelink subframe in accordance with other embodiments of the present disclosure.
  • sidelink subframes in Fig. 6 may be LTE sidelink subframes.
  • all symbols in a subframe are used as sidelink resource.
  • the first symbol is used as AGC and the last symbol is used as GP.
  • LTE sidelink channels may comprise PSCCH and PSSCH.
  • PSCCH may carry SCI format 1.
  • One PSCCH is associated with one sub-channel.
  • Each PSCCH resource has a fixed size.
  • each PSCCH resource may comprise two consecutive PRBs and all symbols in a sidelink subframe.
  • PSSCH may carry sidelink data and use sub-channel as frequency unit.
  • the terminal device 110, the terminal device 120 or the terminal device 130 may use one or more consecutive sub-channels as PSSCH resource to transmit sidelink data. Relationship between PSCCH and PSSCH may be one-to-one mapping.
  • overlapping resources should be defined for the two RATs.
  • Embodiments of the present disclosure provide a solution for sidelink communications so as to solve the above problems and one or more of other potential problems.
  • a first terminal device obtains information about a first type of sidelink resources.
  • the first type of sidelink resources can be used for both a first sidelink associated with a first radio access technology (RAT) and a second sidelink associated with a second RAT.
  • the first terminal device determines the first type of sidelink resources based on the information. In this way, dynamic co-existence of the first sidelink and the second sidelink may be achieved.
  • RAT radio access technology
  • Fig. 8 illustrates a flowchart of an example method in accordance with some embodiments of the present disclosure.
  • the method 800 can be implemented at a terminal device, such as one of the terminal device 110, the terminal device 120 and the terminal device 130 as shown in Fig. 1.
  • a terminal device such as one of the terminal device 110, the terminal device 120 and the terminal device 130 as shown in Fig. 1.
  • the method 800 will be described with reference to Fig. 1 as performed by the terminal device 110 without loss of generality.
  • the terminal device 110 transmits or receives a sidelink signal on the at least one of the third sidelink control channel resource and the third sidelink shared channel resource.
  • the third sidelink control channel resource and the third sidelink shared channel resource are within the overlapping resources.
  • the first RAT may be LTE and the second RAT may be NR.
  • the first sidelink may be a sidelink associated with LTE (also referred to as LTE sidelink)
  • the second sidelink may be a sidelink associated with NR (also referred to as NR sidelink)
  • the third sidelink control channel resource may be an NR PSCCH resource within the overlapping resources between the LTE sidelink resources and the NR sidelink resources.
  • the third sidelink shared channel resource may be an NR PSSCH resource within the overlapping resources between the LTE sidelink resources and the NR sidelink resources.
  • a first sidelink control channel resource of the first sidelink may be an LTE PSCCH resource
  • a first sidelink shared channel resource of the first sidelink may be an LTE PSSCH resource
  • a first sub-channel of the first sidelink may be an LTE sub-channel.
  • a second sidelink control channel resource of the second sidelink may be an NR PSCCH resource and a second sidelink shared channel resource of the second sidelink may be an NR PSSCH resource.
  • a second sub-channel of the second sidelink may be an NR sub-channel.
  • LTE sidelink and NR sidelink for example. It shall be understood that the solution of the present disclosure may be applied to other RATs than LTE and NR.
  • the terminal device 110 may determine a first sidelink control channel resource of the first sidelink based on the configuration or pre-configuration of the first sidelink. In addition, the terminal device 110 may determine a second sidelink control channel resource of the second sidelink based on the configuration or pre-configuration of the second sidelink. In turn, the terminal device 110 may determine the third sidelink control channel resource which comprises symbols and RBs comprised in the first sidelink control channel resource. Alternatively, the terminal device 110 may determine the third sidelink control channel resource which comprises symbols and RBs comprised in the second sidelink control channel resource. This will be described with reference to Figs. 9A and 9B.
  • Figs. 9A and 9B illustrate an example of the third sidelink control resource in accordance with some embodiments of the present disclosure, respectively.
  • the terminal device 110 reuses an LTE PSCCH resource unit as an NR PSCCH resource unit within overlapping resources 910 between an NR sidelink resource pool and an LTE sidelink resource pool.
  • an NR PSCCH resource within the overlapping resources 910 comprises symbols and RBs comprised in an LTE PSCCH resource.
  • NR PSCCH allocations are different between the overlapping resources 910 and non-overlapping resources 920.
  • An NR PSCCH resource within the overlapping resources 910 comprises all symbols in a slot and two RBs.
  • An NR PSCCH resource within the non-overlapping resources 920 comprises part of symbols in a slot and more than two RBs.
  • a boundary of the NR PSCCH resource within the overlapping resources 910 is aligned with a boundary of the LTE PSCCH resource.
  • the terminal device 110 determines an NR PSCCH resource within overlapping resources 930 based on an NR PSCCH resource configuration.
  • an NR PSCCH resource within the overlapping resources 930 comprises symbols and RBs comprised in an NR PSCCH resource.
  • a common configuration for NR PSCCH resources are used for both the overlapping resources 930 and non-overlapping resources 940.
  • an NR PSCCH resource within the overlapping sidelink resources 930 or non-overlapping resources 940 comprises a first number of symbols.
  • the first number (represented by m) is equal to the number of symbols configured for an NR PSCCH resource.
  • each NR PSCCH resource is associated with an NR sub-channel.
  • Mapping relationship between the NR PSCCH resource and the NR sub-channel is the same as that between an LTE PSCCH resource and corresponding LTE sub-channel.
  • the terminal device 110 may determine the third sidelink control channel resource based on at least one of the configuration or pre-configuration of the first sidelink or the configuration or pre-configuration of the second sidelink. In this way, a scheme may be achieved with less impact on legacy sidelink. In addition, potential conflict between the two RATs may be reduced.
  • the configuration or pre-configuration of the second sidelink may indicate at least one of following:
  • the configuration or pre-configuration of the first sidelink may indicate at least one of following:
  • the configuration or pre-configuration of the second sidelink may indicate at least one of following:
  • the terminal device 110 may determine a start RB or an end RB of the third sidelink control channel resource or the third sidelink shared channel resource to be aligned with at least one of the following:
  • the first number may be equal to the first integer multiple of the number of symbols of the first sidelink shared channel resource of the first sidelink.
  • the first number may be equal to the number of symbols of the second sidelink control channel resource of the second sidelink.
  • the first number may be equal to a difference between the number of symbols of the second sidelink control channel resource and the number of symbols for the AGC.
  • the first number may be equal to the number of symbols of the third sidelink control channel resource or the number of symbols of the first type of sidelink resources within a subframe or a slot.
  • the second number may be equal to a second integer multiple of the number of RBs of the first sidelink control channel resource of the first sidelink. In some embodiments, the second integer multiple may be determined based on a first SCS of the first sidelink and a second SCS of the second sidelink.
  • the second number may be equal to or less than the number of RBs of the second sub-channel of the second sidelink.
  • the second number may be equal to a difference between the number of RBs in the first sub-channel and the number of RBs in the first sidelink control channel resource.
  • the second number may be equal to a least common multiple of the number of RBs of the first sub-channel and the number of RBs of the second sub-channel.
  • the second number may be equal to the number of RBs of the third sidelink control channel resource.
  • an LTE SCS is different from an NR SCS.
  • the LTE SCS is equal to 15 kHz
  • the NR SCS is equal to 30 kHz.
  • each NR PSCCH resource within overlapping resources keeps the same bandwidth in frequency of an LTE PSCCH unit.
  • each NR PSCCH resource within the overlapping resources comprises m symbols.
  • each NR PSCCH resource comprises n RBs.
  • N is equal to or less than the number of RBs of an LTE sub-channel.
  • n is equal to the number of RBs of the LTE sub-channel.
  • each NR PSCCH resource contains resources used as LTE PSCCH and LTE PSSCH.
  • a location of the m symbols is determined to be the same as that of SL symbols for the NR PSSCH resource.
  • the first number (represented by m) and the second number (represented by n) may be configured or pre-configured for the third sidelink control channel resource. This will be described with reference to Fig. 11A.
  • Fig. 11A illustrates an example of the third sidelink control resource in accordance with some embodiments of the present disclosure.
  • two NR PSCCH resources (such as NR PSCCH resources #k and #s) are contained in a resource which may be also used as an LTE sub-channel.
  • the example of Fig. 11A may provide more flexible configuration for NR PSCCH resources within the shared resources.
  • Fig. 11B illustrates an example of the third sidelink control resource in accordance with some embodiments of the present disclosure.
  • an LTE SCS is equal to 15 kHz
  • an NR SCS is equal to 60 kHz.
  • each NR PSCCH resource within overlapping resources comprises m symbols, where m is equal to an integer multiple of the number of symbols of the LTE sidelink within a subframe.
  • m 14*t
  • t is equal to a ratio of the NR SCS to the LTE SCS.
  • the third number may be equal to the first integer multiple of the number of symbols of a first sidelink shared channel resource of the first sidelink.
  • the first integer multiple may be determined based on a first SCS of the first sidelink and a second SCS of the second sidelink.
  • the third number may be equal to the first integer multiple of the number of symbols of the first sidelink within a subframe.
  • the third number may be equal to a difference between the first integer multiple and the number of symbols for an AGC and a GP.
  • the third number may be equal to the number of symbols of a second sidelink control channel resource of the second sidelink.
  • the third number may be equal to the number of symbols of a second sidelink shared channel resource of the second sidelink.
  • the third number may be equal to the number of symbols of the second sidelink within a slot.
  • the third number may be equal to a difference between the number of symbols of the second sidelink control channel resource and the number of symbols for the AGC.
  • the third number may be equal to a difference between the number of symbols of the second sidelink shared channel resource and the number of symbols for the AGC and the guard period.
  • the third number may be equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC and a GP.
  • the third number may be equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC, the GP and a sidelink feedback channel.
  • the third number may be equal to the number of symbols of the third sidelink shared channel resource or the number of symbols of the first type of sidelink resources within a subframe or a slot.
  • the third sidelink shared channel resource may comprise an integer multiple of a fourth number of RBs.
  • the fourth number is the number of RBs comprised in the third sub-channel for the first type of sidelink resources.
  • the fourth number may be represented by q.
  • the fourth number may be equal to the second integer multiple of the number of RBs of the first sidelink control channel resource of the first sidelink.
  • the second integer multiple may be determined based on a first SCS of the first sidelink and a second SCS of the second sidelink.
  • the fourth number may be equal to the second integer multiple of the number of RBs of the first sub-channel of the first sidelink.
  • the fourth number may be equal to a least common multiple of the number of RBs of the first sub-channel and the number of RBs of the second sub-channel.
  • the fourth number may be equal to the number of RBs of the third sidelink control channel resource.
  • the fourth number may be equal to the number of RBs of the third sub-channel.
  • Figs. 12A to 12D illustrate an example of the third sidelink shared channel resource in accordance with some embodiments of the present disclosure, respectively.
  • ⁇ different sidelink configurations are used for overlapping resources and non-overlapping resources (also referred to as dedicated resources) with an NR sidelink resource pool.
  • An LTE sub-channel configuration is reused for overlapping resources.
  • each NR PSSCH resource within the overlapping resources comprises p symbols.
  • P is equal to the number of symbols of the LTE sidelink within a subframe.
  • an LTE SCS is equal to an NR SCS.
  • An LTE sub-channel size is different from an NR sub-channel size.
  • the LTE sub-channel size may be represented by L LTE and the NR sub-channel size may be represented by L NR .
  • L NR 2 L LTE .
  • An LTE sub-channel configuration is reused within the overlapping resources.
  • each NR sub-channel within the overlapping resources comprises q RBs, where q is equal to the number of RBs of an LTE sub-channel.
  • a boundary between the overlapping resources and the non-overlapping resources is aligned with a boundary of the LTE sub-channel or the NR sub-channel.
  • each NR PSSCH resource within the overlapping resources comprises p symbols, where p is equal to the number of symbols of the LTE sidelink within a subframe.
  • Fig. 12B is also similar to the example of Fig. 12A in that in frequency domain, an LTE SCS is equal to an NR SCS and an LTE sub-channel size is different from an NR sub-channel size.
  • the example of Fig. 12B is different from the example of Fig. 12A in that a first boundary between the overlapping resources and the non-overlapping resources is not aligned with a second boundary of the LTE sub-channel or a third boundary of the NR sub-channel. Thus, there is a gap between the first boundary and the second boundary or the third boundary.
  • the number of RBs in the gap (also referred to as GP RBs) is greater than zero and less than the LTE sub-channel size or the NR sub-channel size.
  • the GP RBs may not be used for NR sidelink signal transmission.
  • a common sidelink configuration is used for overlapping resources and non-overlapping resources with an NR sidelink resource pool.
  • the common sidelink configuration is the same as the NR sidelink configuration.
  • an NR sub-channel configuration is reused for the overlapping resources.
  • the number of RBs of a sub-channel for both the overlapping resources and the non-overlapping resources is represented by L NRcom .
  • each NR PSSCH resource within the overlapping resources comprises p symbols.
  • a boundary of an LTE sub-channel and an NR sub-channel may be not aligned.
  • Fig. 12D different sidelink configurations are used for overlapping resources and non-overlapping resources with an NR sidelink resource pool.
  • each NR PSSCH resource within the overlapping resources comprises p symbols.
  • P is equal to the number of symbols of the NR sidelink within a slot.
  • L NRnov 20.
  • NR PSSCH resources within overlapping resources are determined based on LTE PSSCH resource scheme.
  • each NR PSSCH resource within the overlapping resources comprises p symbols.
  • P is equal to the number of symbols of the LTE sidelink within a subframe.
  • each NR PSSCH resource comprises an integer multiple of q RBs.
  • Q is the number of RBs comprised in the third sub-channel for the overlapping resources.
  • q is equal to a least common multiple of the number of RBs of the LTE sub-channel and the number of RBs of the NR sub-channel.
  • q a least common multiple of (L LTE , L NRcom ) .
  • a boundary of the NR sub-channel within overlapping resources is aligned with that of the LTE sub-channel within the overlapping resources.
  • Figs. 13A and 13B may produce less impact on both LTE and NR.
  • aligning boundary of sub-channels may avoid potential conflict.
  • NR PSSCH resources within overlapping resources are determined based on SCS configurations and LTE PSSCH resource scheme.
  • each NR PSSCH resource within the overlapping resources comprises p symbols.
  • an LTE SCS is different from an NR SCS.
  • the LTE SCS is equal to 15 kHz
  • the NR SCS is equal to 30 kHz.
  • Each NR PSSCH resource comprises an integer multiple of q RBs.
  • Q is the number of RBs comprised in the third sub-channel for the overlapping resources.
  • NR PSSCH resources within overlapping resources are also determined based on SCS configurations and LTE PSSCH resource scheme.
  • each NR PSSCH resource within the overlapping resources comprises p symbols.
  • an LTE SCS is different from an NR SCS.
  • the LTE SCS is equal to 15 kHz
  • the NR SCS is equal to 30 kHz.
  • Each NR PSSCH resource comprises an integer multiple of q RBs.
  • Q is the number of RBs comprised in the third sub-channel for the overlapping resources.
  • the sub-channel size for NR PSSCH resources within overlapping resources may be determined based on the LTE sub-channel size.
  • the LTE sub-channel size may be determined as one of sub-channel sizes in a first set
  • the sub-channel size for NR PSSCH resources may be determined as one of sub-channel sizes in a second set associated with the first set. Table 1 shows an example of the first set and the second set.
  • LTE sub-channel size in the first set Available NR sub-channel size in the second set 5, 10, 15, 20, 25, 30, 50, 75, 100 10, 15, 20, 25, 50, 75, 100 4, 8, 12, 16, 48, 72, 96 12 6, 9, 18 NA
  • the sub-channel size for NR PSSCH resources may be determined as one of 10, 15, 20, 25, 50, 75 and 100.
  • the LTE sub-channel size is determined as one of 6, 9 and 18, there is no available sub-channel size for NR PSSCH resources.
  • each NR PSSCH resource within the overlapping resources comprises p symbols.
  • dedicated sidelink configurations are used for overlapping resources and non-overlapping resources with an NR sidelink resource pool.
  • NR PSSCH resources are determined based on dedicated sidelink configurations for the overlapping resources and non-overlapping resources.
  • each NR PSSCH resource within the overlapping resources comprises p symbols.
  • P is equal to the number of symbols of the LTE sidelink within a subframe.
  • each NR PSSCH resource within overlapping resources comprises an integer multiple of q RBs.
  • Q is the number of RBs comprised in the third sub-channel for the overlapping resources.
  • q L NRovr .
  • Each NR PSSCH resource within non-overlapping resources comprises an integer multiple of v RBs.
  • Fig. 14 illustrates a flowchart of an example method in accordance with some embodiments of the present disclosure.
  • the method 1400 can be implemented at a network device, such as one of the network devices 140 and 150 as shown in Fig. 1.
  • a network device such as one of the network devices 140 and 150 as shown in Fig. 1.
  • the method 1400 will be described with reference to Fig. 1 as performed by the network device 140 without loss of generality.
  • the network device 140 determines at least one of a third sidelink control channel resource and a third sidelink shared channel resource within a first type of sidelink resources.
  • the first type of sidelink resources can be used for both a first sidelink associated with a first RAT and a second sidelink associated with a second RAT.
  • the network device 140 transmits a configuration of the at least one of the third sidelink control channel resource and the third sidelink shared channel resource.
  • determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises determining at least one of following:
  • determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises determining at least one of following:
  • determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource based on at least one of the following: a configuration or pre-configuration of the first sidelink, a configuration or pre-configuration of the second sidelink, or a configuration or pre-configuration of the first type of sidelink resources.
  • determining the third sidelink control channel resource comprises at least one of the following: determining the third sidelink control channel resource which comprises symbols and RBs comprised in a first sidelink control channel resource of the first sidelink, or determining the third sidelink control channel resource which comprises symbols and RBs comprised in a second sidelink control channel resource of the second sidelink.
  • the first sidelink control channel resource of the first sidelink is determined based on the configuration or pre-configuration of the first sidelink; and the second sidelink control channel resource of the second sidelink is determined based on the configuration or pre-configuration of the second sidelink.
  • the configuration or pre-configuration of the first sidelink indicates at least one of following:
  • the configuration or pre-configuration of the second sidelink indicates at least one of following:
  • the configuration or pre-configuration of the first type of sidelink resources indicates at least one of following:
  • ⁇ an end symbol of the first type of sidelink resources within a subframe or a slot.
  • the configuration or pre-configuration of the first sidelink indicates at least one of following:
  • the configuration or pre-configuration of the second sidelink indicates at least one of following:
  • the configuration or pre-configuration of the first type of sidelink resources indicates a third SCS of the first type of sidelink resources.
  • determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises: determining a start symbol or an end symbol of the third sidelink control channel resource or the third sidelink shared channel resource to be aligned with at least one of the following:
  • determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises at least one of the following: determining the third sidelink control channel resource which comprises a first number of symbols, or determining the third sidelink shared channel resource which comprises a third number of symbols.
  • the first number is equal to a first integer multiple of the number of symbols of a first sidelink control channel resource of the first sidelink.
  • the first number or the third number is equal to the first integer multiple of the number of symbols of a first sidelink shared channel resource of the first sidelink.
  • the first number or the third number is equal to the first integer multiple of the number of symbols of the first sidelink within a subframe.
  • the first number or the third number is equal to a difference between the first integer multiple and the number of symbols for an AGC and a guard period.
  • the first number or the third number is equal to the number of symbols of a second sidelink control channel resource of the second sidelink.
  • the first number or the third number is equal to the number of symbols of a second sidelink shared channel resource of the second sidelink.
  • the first number or the third number is equal to the number of symbols of the second sidelink within a slot.
  • the first number or the third number is equal to a difference between the number of symbols of the second sidelink control channel resource and the number of symbols for the AGC.
  • the first number or the third number is equal to a difference between the number of symbols of the second sidelink shared channel resource and the number of symbols for the AGC and the guard period.
  • the first number or the third number is equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC and a guard period.
  • the first number or the third number is equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC. the guard period and a sidelink feedback channel.
  • the first number is equal to the number of symbols of the first type of sidelink resources within a subframe or a slot.
  • the third number is equal to the number of symbols of the first type of sidelink resources within a subframe or a slot.
  • determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises: determining a start RB or an end RB of the third sidelink control channel resource or the third sidelink shared channel resource to be aligned with at least one of the following:
  • determining at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises at least one of the following: determining the third sidelink control channel resource which comprises a second number of RBs, or determining the third sidelink shared channel resource which comprises an integer multiple of a fourth number of RBs, the fourth number being the number of RBs comprised in the third sub-channel.
  • the second number or the fourth number is equal to the second integer multiple of the number of RBs of the first sidelink control channel resource of the first sidelink.
  • the second number or the fourth number is equal to the second integer multiple of the number of RBs of the first sub-channel of the first sidelink.
  • the second number or the fourth number is equal to or less than the number of RBs of the first sub-channel of the first sidelink.
  • the second number or the fourth number is equal to or less than the number of RBs of the second sub-channel of the second sidelink.
  • the second number or the fourth number is equal to a difference between the number of RBs in the first sub-channel and the number of RBs in the first sidelink control channel resource.
  • the second number or the fourth number is equal to a least common multiple of the number of RBs of the first sub-channel and the number of RBs of the second sub-channel.
  • the first integer multiple is determined based on a first SCS of the first sidelink and a second SCS of the second sidelink.
  • the second integer multiple is determined based on a first SCS of the first sidelink and a second SCS of the second sidelink.
  • Fig. 15 is a simplified block diagram of a device 1500 that is suitable for implementing some embodiments of the present disclosure.
  • the device 1500 can be considered as a further example embodiment of one of the terminal devices 110, 120 and 130, or one of the network devices 140 and 150 as shown in Fig. 1. Accordingly, the device 1500 can be implemented at or as at least a part of one of the terminal devices 110, 120 and 130, or one of the network devices 140 and 150.
  • the device 1500 includes a processor 1510, a memory 1520 coupled to the processor 1510, a suitable transmitter (TX) and receiver (RX) 1540 coupled to the processor 1510, and a communication interface coupled to the TX/RX 1540.
  • the memory 1520 stores at least a part of a program 1530.
  • the TX/RX 1540 is for bidirectional communications.
  • the TX/RX 1540 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones.
  • the communication interface may represent any interface that is necessary for communication with other network elements, such as X2 interface for bidirectional communications between gNBs or eNBs, S1 interface for communication between a Mobility Management Entity (MME) /Serving Gateway (S-GW) and the gNB or eNB, Un interface for communication between the gNB or eNB and a relay node (RN) , or Uu interface for communication between the gNB or eNB and a terminal device.
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • Un interface for communication between the gNB or eNB and a relay node (RN)
  • Uu interface for communication between the gNB or eNB and a terminal device.
  • the program 1530 is assumed to include program instructions that, when executed by the associated processor 1510, enable the device 1500 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to Figs. 1 to 16.
  • the embodiments herein may be implemented by computer software executable by the processor 1510 of the device 1500, or by hardware, or by a combination of software and hardware.
  • the processor 1510 may be configured to implement various embodiments of the present disclosure.
  • a combination of the processor 1510 and memory 1520 may form processing means 1550 adapted to implement various embodiments of the present disclosure.
  • the memory 1520 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1520 is shown in the device 1500, there may be several physically distinct memory modules in the device 1500.
  • the processor 1510 may be of any type suitable to the local technical network, 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 device 1500 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 components included in the apparatuses and/or devices of the present disclosure may be implemented in various manners, including software, hardware, firmware, or any combination thereof.
  • one or more units may be implemented using software and/or firmware, for example, machine-executable instructions stored on the storage medium.
  • parts or all of the units in the apparatuses and/or devices may be implemented, at least in part, by one or more hardware logic components.
  • FPGAs Field-programmable Gate Arrays
  • ASICs Application-specific Integrated Circuits
  • ASSPs Application-specific Standard Products
  • SOCs System-on-a-chip systems
  • CPLDs Complex Programmable Logic Devices

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Abstract

Embodiments of the present disclosure relate to method, device and computer readable media for sidelink communications. A method for sidelink communications comprises determining, at a terminal device, at least one of a third sidelink control channel resource and a third sidelink shared channel resource within a first type of sidelink resources based on at least one of the following: a configuration or pre-configuration of a first sidelink associated with a first RAT, a configuration or pre-configuration of a second sidelink associated with a second RAT, or a configuration or pre-configuration of the first type of sidelink resources. The first type of sidelink resources can be used for both the first sidelink and the second sidelink. The method also comprises transmitting or receiving a sidelink signal on the at least one of the third sidelink control channel resource and the third sidelink shared channel resource.

Description

METHOD, DEVICE AND COMPUTER READABLE MEDIUM FOR SIDELINK COMMUNICATIONS TECHNICAL FIELD
Embodiments of the present disclosure generally relate to the field of telecommunication, and in particular, to a method, device and computer readable media for sidelink communications.
BACKGROUND
There may be co-existence of a Long Term Evolution (LTE) sidelink and a New Radio (NR) sidelink. The co-existence of the two radio access technologies (RATs) may be based on LTE sidelink and NR sidelink framework. When a terminal device transmits or receives a NR sidelink signal, impact on LTE sidelink is not allowed. For the co-existence of LTE sidelink and NR sidelink, dynamic resource sharing scheme using overlapping resources of the two RATs needs to be specified. In addition, with sharing resources, sidelink channels and relationship between the sidelink channels may be modified.
SUMMARY
In general, example embodiments of the present disclosure provide methods, devices and computer readable media for communications.
In a first aspect, there is provided a method for sidelink communications. The method comprises: determining, at a terminal device, at least one of a third sidelink control channel resource and a third sidelink shared channel resource within a first type of sidelink resources based on at least one of the following: a configuration or pre-configuration of a first sidelink associated with a first RAT, a configuration or pre-configuration of a second sidelink associated with a second RAT, or a configuration or pre-configuration of the first type of sidelink resources, wherein the first type of sidelink resources can be used for both the first sidelink and the second sidelink; and transmitting or receiving a sidelink signal on the at least one of the third sidelink control channel resource and the third sidelink shared channel resource.
In a second aspect, there is provided a method for sidelink communications. The method comprises: determining, at a network device, at least one of a third sidelink control channel resource and a third sidelink shared channel resource within a first type of sidelink  resources, wherein the first type of sidelink resources can be used for both a first sidelink associated with a first RAT and a second sidelink associated with a second RAT; and transmitting a configuration of the at least one of the third sidelink control channel resource and the third sidelink shared channel resource.
In a third aspect, there is provided a terminal device. The terminal device comprises a processor and a memory storing instructions. The memory and the instructions are configured, with the processor, to cause the terminal device to perform the method according to the first aspect.
In a fourth aspect, there is provided a network device. The network device comprises a processor and a memory storing instructions. The memory and the instructions are configured, with the processor, to cause the network device to perform the method according to the second aspect.
In a fifth aspect, there is provided a computer readable medium having instructions stored thereon. The instructions, when executed on at least one processor of a device, cause the device to perform the method according to the first aspect.
In a sixth aspect, there is provided a computer readable medium having instructions stored thereon. The instructions, when executed on at least one processor of a device, cause the device to perform the method according to the second aspect.
It is to be understood that the summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description.
BRIEF DESCRIPTION OF THE DRAWINGS
Through the more detailed description of some embodiments of the present disclosure in the accompanying drawings, the above and other objects, features and advantages of the present disclosure will become more apparent, wherein:
Fig. 1 illustrates an example communication network in which embodiments of the present disclosure can be implemented;
Fig. 2 illustrates an example of a timing resource allocation in a sidelink resource pool in accordance with some embodiments of the present disclosure;
Fig. 3 illustrates an example of a symbol allocation in a sidelink slot in accordance with some embodiments of the present disclosure;
Fig. 4 illustrates an example of a frequency resource allocation in a sidelink  resource pool in accordance with some embodiments of the present disclosure;
Fig. 5 illustrates an example of sidelink channels in time domain in accordance with some embodiments of the present disclosure;
Fig. 6 illustrates an example of a symbol allocation in a sidelink subframe in accordance with other embodiments of the present disclosure;
Figs. 7A and 7B illustrate an example of a frequency resource allocation in a sidelink resource pool in accordance with other embodiments of the present disclosure, respectively;
Fig. 8 illustrates a flowchart of an example method in accordance with some embodiments of the present disclosure;
Figs. 9A and 9B illustrate an example of a third sidelink control resource in accordance with some embodiments of the present disclosure, respectively;
Figs. 10A to 10F illustrate an example of the third sidelink control channel resource in accordance with some embodiments of the present disclosure, respectively;
Figs. 11A and 11B illustrate an example of the third sidelink control channel resource in accordance with some embodiments of the present disclosure, respectively;
Figs. 12A to 12D illustrate an example of a third sidelink shared channel resource in accordance with some embodiments of the present disclosure, respectively;
Figs. 13A to 13F illustrate an example of the third sidelink shared channel resource in accordance with some embodiments of the present disclosure, respectively;
Fig. 14 illustrates a flowchart of an example method in accordance with other embodiments of the present disclosure; and
Fig. 15 is a simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure.
Throughout the drawings, the same or similar reference numerals represent the same or similar element.
DETAILED DESCRIPTION
Principle of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitations as to the scope of the disclosure. The disclosure described herein can be implemented in various manners other than the ones described below.
In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
As used herein, the term “terminal device” refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, device on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for Integrated Access and Backhaul (IAB) , Small Data Transmission (SDT) , mobility, Multicast and Broadcast Services (MBS) , positioning, dynamic/flexible duplex in commercial networks, reduced capability (RedCap) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The ‘terminal device’ can further has ‘multicast/broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM. The term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
The term “network device” refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate. Examples of a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , Network-controlled Repeaters, and the like.
The terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
The terminal or the network device may work on several frequency ranges, e.g. FR1 (410 MHz –7125 MHz) , FR2 (24.25GHz to 71GHz) , frequency band larger than 100GHz as well as Tera Hertz (THz) . It can further work on licensed/unlicensed/shared spectrum. The terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario. The terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
The network device may have the function of network energy saving, Self-Organizing Networks (SON) /Minimization of Drive Tests (MDT) . The terminal may have the function of power saving.
The embodiments of the present disclosure may be performed in test equipment, e.g. signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator
The embodiments of the present disclosure may be performed according to any generation 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, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
As used herein, the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise. The term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’ The term ‘based on’ is to be read as ‘at least in part based on. ’ The term ‘some embodiments’ and ‘an embodiment’ are to be read as ‘at least some embodiments. ’ The term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’ The terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
In some examples, values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
Fig. 1 illustrates a schematic diagram of an example communication network 100 in which embodiments of the present disclosure can be implemented. As shown in Fig. 1, the communication network 100 may include a terminal device 110, a terminal device 120, a terminal device 130,  network devices  140 and 150. The  network devices  140 and 150 may communicate with the terminal device 110, the terminal device 120 and the terminal device 130 via respective wireless communication channels.
In some embodiments, the network device 140 may be a gNB in NR. Thus, the network device 140 may be also referred to as an NR network device 140.
In some embodiments, the network device 150 may be an eNB in Long Term Evolution (LTE) system. Thus, the network device 150 may be also referred to as an LTE network device 150.
It is to be understood that the number of devices in Fig. 1 is given for the purpose of illustration without suggesting any limitations to the present disclosure. The communication network 100 may include any suitable number of network devices and/or terminal devices adapted for implementing embodiments of the present disclosure.
The communications in the communication network 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , LTE, LTE-Evolution, LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like. Furthermore, the communications may be performed according to any generation 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.
In some embodiments, the communications in the communication network 100 may comprise sidelink communication. Sidelink communication is a wireless radio communication directly between two or more terminal devices, such as two or more terminal devices among the terminal device 110, the terminal device 120 and the terminal device 130. In this type of communication, the two or more terminal devices that are geographically proximate to each other can directly communicate without going through the  network device  140 or 150 or through a core network. Data transmission in sidelink communication is thus different from typical cellular network communications, in which a terminal device transmits data to the network device 140 or 150 (i.e., uplink transmissions) or receives data from the  network device 140 or 150 (i.e., downlink transmissions) . In sidelink communication, data is transmitted directly from a source terminal device (such as the terminal device 110) to a target terminal device (such as the terminal device 120) through the Unified Air Interface, e.g., PC5 interface, (i.e., sidelink transmissions) , as shown in Fig. 1.
Sidelink communication can provide several advantages, including reducing data transmission load on a core network, system resource consumption, transmission power consumption, and network operation costs, saving wireless spectrum resources, and increasing spectrum efficiency of a cellular wireless communication system.
In a sidelink communication system, the sidelink resource is used to transmit information between terminal devices. According to application scenarios, service types, etc., a sidelink communication manner includes but is not limited to device to device (D2D) communication, Vehicle-to-Everything (V2X) communication, etc.
V2X communication enables vehicles to communicate with other vehicles (i.e. Vehicle-to-Vehicle (V2V) communication) , with infrastructure (i.e. Vehicle-to-Infrastructure (V2I) , with wireless networks (i.e. Vehicle-to-Network (V2N) communication) , with pedestrians (i.e. Vehicle-to-Pedestrian (V2P) communication) , and even with the owner's home (i.e. Vehicle-to-Home (V2H) ) . Examples of infrastructure include roadside units such as traffic lights, toll gates and the like. V2X communication can be used in a wide range of scenarios, including in accident prevention and safety, convenience, traffic efficiency and clean driving, and ultimately in relation to autonomous or self-driving vehicles.
For sidelink communications, a terminal device uses resources in sidelink resource pools to transmit or receive signals. The sidelink resource pools include resources in time domain and frequency domain, which are dedicated resources of the sidelink communication, or shared by the sidelink communication and a cellular link. For sidelink communications, two modes of resource assignment may be used for sidelink, including network device schedules sidelink resources for terminal devices to perform sidelink signal transmission, named as mode 1 resource scheme in NR sidelink or mode 3 resource scheme in LTE sidelink, and terminal device selects sidelink resources by itself to perform sidelink signal transmission, named as mode 2 resource scheme in NR sidelink or mode 4 resource scheme in LTE sidelink.
Fig. 2 illustrates an example of a timing resource allocation in a sidelink resource pool in accordance with some embodiments of the present disclosure. In some embodiments, the sidelink resource pool may comprise an NR sidelink resource pool. In such embodiments, the sidelink resource pool may be defined within a sidelink bandwidth part  (BWP) . The terminal device 110, the terminal device 120 and the terminal device 130 may use uplink (UL) resources for sidelink communications. More than one sidelink resource pools may be configured for one of the terminal device 110, the terminal device 120 and the terminal device 130. A dedicated resource pool may be used for mode 1 resource scheme or mode 2 resource scheme, short for mode 1 resource pool or mode 2 resource pool. For LTE sidelink, a dedicated resource pool may be used for mode 3 resource scheme or mode 4 resource scheme, short for mode 3 resource pool or mode 4 resource pool. Resources within the sidelink resource pool may comprise Physical Sidelink Control Channel (PSCCH) resources, Physical Sidelink Shared Channel (PSSCH) resources and physical sidelink feedback channel (PSFCH) resources. A bitmap may be used to indicate which UL slots are configured as sidelink slots. A length of the bitmap may be in a range of 10 to 160.
Fig. 3 illustrates an example of a symbol allocation in a sidelink slot in accordance with some embodiments of the present disclosure. In the sidelink resource pool which may contain multiple slots and resource blocks (RBs) , and all or part of the symbols in a slot can be used for sidelink transmission. Within the resource pool, among all the symbols configured for sidelink in each slot, the first symbol (i.e., the start symbol) is used as the automatic gain control (AGC) symbol, and the last symbol used as a guard period (GP) symbol. AGC symbols and GP symbols can be considered as fixed overheads in sidelink resource. In the description of the following embodiments, AGC symbols and GP symbols are included in the sidelink symbols which are indicated by the sidelink channel resource configuration, and AGC symbols carry redundancy sidelink information while GP symbols are not used for carrying sidelink information, as shown in Fig. 3.
The terminal device 110, the terminal device 120 and the terminal device 130 may use sidelink channels to transmit sidelink signaling or information. The sidelink channels include at least one of the following: a PSCCH resource which is used for carrying sidelink control information (SCI) , a PSSCH resource which is used for carrying sidelink data service information, a PSFCH resource which is used for carrying sidelink Hybrid Automatic Repeat Request (HARQ) feedback information, a physical sidelink broadcast channel (PSBCH) resource which is used for carrying sidelink broadcast information, and a physical sidelink discovery channel (PSDCH) resource which is used for carrying a sidelink discovery signal.
Fig. 4 illustrates an example of a frequency resource allocation in a sidelink resource pool in accordance with some embodiments of the present disclosure. In some embodiments, the sidelink resource pool may be an NR sidelink resource pool. As shown in  Fig. 4, the sidelink resource pool may be configured within a SL Bandwidth Part (Sidelink BWP) . A resource pool configuration may comprise sl-StartRB-Subchannel and sl-RB-Number. The sl-StartRB-Subchannel may indicate the lowest Resource Block (RB) of the resource pool. The lowest RB is also referred to as a start RB. The sl-RB-Number may indicate the total number of RBs of the resource pool.
RBs in the resource pool may be divided into consecutive sub-channels. Sub-channel is a frequency resource unit of PSSCH. Each sub-channel contains consecutive RBs. The  terminal devices  110, 120 and 130 may use one or more consecutive sub-channels as a PSSCH resource to transmit sidelink data. A sub-channel configuration of the resource pool may comprise sl-SubchannelSize which indicates the number of RBs contained in one sub-channel. The SubchannelSize may be equal to 10, 12, 15, 20, 25, 50, 75 or 100.
Fig. 5 illustrates an example of sidelink channels in time domain in accordance with some embodiments of the present disclosure. In the example of Fig. 5, the sidelink channels comprise PSCCH and PSSCH. PSCCH may carry SCI format 1. One PSCCH may be defined within each sub-channel. Each PSCCH resource may include t consecutive symbols in time domain and k consecutive RBs in frequency domain. The t symbols start from the first symbol in the available symbols in the time domain, where t = 2 or 3. The k RBs start from the first RB in the corresponding sub-channel, where k = 10, 12, 15, 20, or 25. PSSCH may carry SCI format 2A/2B and sidelink data PSSCH uses sub-channel as a frequency unit. The  terminal devices  110, 120 and 130 may use one or more consecutive sub-channels as a PSSCH resource to transmit sidelink data.
Similar to the NR sidelink resource pool, within an LTE sidelink resource pool, the terminal device 110, the terminal device 120 or the terminal device 130 may use uplink (UL) resources for sidelink communications. More than one sidelink resource pools may be configured for the terminal device 110, the terminal device 120 or the terminal device 130. Resources within the LTE sidelink resource pool may comprise a PSCCH resource pool and a PSSCH resource pool. A bitmap may be used to indicate which UL subframes are configured as sidelink subframes.
Fig. 6 illustrates an example of a symbol allocation in a sidelink subframe in accordance with other embodiments of the present disclosure. In some embodiments, sidelink subframes in Fig. 6 may be LTE sidelink subframes. As shown in Fig. 6, all symbols in a subframe are used as sidelink resource. In a subframe, the first symbol is used as AGC and the last symbol is used as GP.
LTE sidelink channels may comprise PSCCH and PSSCH. PSCCH may carry SCI format 1. One PSCCH is associated with one sub-channel. Each PSCCH resource has a fixed size. For example, each PSCCH resource may comprise two consecutive PRBs and all symbols in a sidelink subframe. PSSCH may carry sidelink data and use sub-channel as frequency unit. The terminal device 110, the terminal device 120 or the terminal device 130 may use one or more consecutive sub-channels as PSSCH resource to transmit sidelink data. Relationship between PSCCH and PSSCH may be one-to-one mapping.
Figs. 7A and 7B illustrate an example of a frequency resource allocation in a sidelink resource pool in accordance with other embodiments of the present disclosure, respectively. In some embodiments, the frequency resource allocations in Figs. 7A and 7B may be for LTE sidelink. As shown in Fig. 7A, the sidelink resource pool may be configured such that PSCCH is adjacent to PSSCH. In such an adjacent configuration, the terminal device 110, the terminal device 120 or the terminal device 130 may transmit PSCCH and the corresponding PSSCH in adjacent resource blocks in a subframe. Alternatively, as shown in Fig. 7B, the sidelink resource pool may be configured such that PSCCH is not adjacent to PSSCH. In such a non-adjacent configuration, the terminal device 110, the terminal device 120 or the terminal device 130 may transmit PSCCH and the corresponding PSSCH in non-adjacent resource blocks in a subframe.
Considering the scenario and requirements of LTE sidelink and NR sidelink dynamic co-existence, overlapping resources should be defined for the two RATs.
Embodiments of the present disclosure provide a solution for sidelink communications so as to solve the above problems and one or more of other potential problems. According to the solution, a first terminal device obtains information about a first type of sidelink resources. The first type of sidelink resources can be used for both a first sidelink associated with a first radio access technology (RAT) and a second sidelink associated with a second RAT. Then, the first terminal device determines the first type of sidelink resources based on the information. In this way, dynamic co-existence of the first sidelink and the second sidelink may be achieved. Hereinafter, principle of the present disclosure will be described with reference to Figs. 8 to 15.
Fig. 8 illustrates a flowchart of an example method in accordance with some embodiments of the present disclosure. In some embodiments, the method 800 can be implemented at a terminal device, such as one of the terminal device 110, the terminal device 120 and the terminal device 130 as shown in Fig. 1. For the purpose of discussion, the method 800 will be described with reference to Fig. 1 as performed by the terminal device  110 without loss of generality.
At block 810, the terminal device 110 determines at least one of a third sidelink control channel resource and a third sidelink shared channel resource within a first type of sidelink resources based on at least one of the following: a configuration or pre-configuration of a first sidelink associated with a first RAT, a configuration or pre-configuration of a second sidelink associated with a second RAT, or a configuration or pre-configuration of the first type of sidelink resources. The first type of sidelink resources can be used for both the first sidelink and the second sidelink.
At block 820, the terminal device 110 transmits or receives a sidelink signal on the at least one of the third sidelink control channel resource and the third sidelink shared channel resource.
With the method 800, dynamic co-existence of the first sidelink and the second sidelink using overlapping resources may be achieved.
In some embodiments, the first type of sidelink resources may be overlapping resources of a first sidelink resource pool for the first sidelink and a second sidelink resource pool for the second sidelink. In other words, the first type of sidelink resources may be shared resources between the first sidelink resource pool and the second sidelink resource pool. In the present disclosure, terms “overlapping” and “shared” may be used interchangeably. On the other hand, dedicated resources may be used for the first sidelink or the second sidelink and may be non-overlapping with each other. Thus, terms “non-overlapping” and “dedicated” may be used interchangeably.
In embodiments where the first type of sidelink resources are the overlapping resources, the third sidelink control channel resource and the third sidelink shared channel resource are within the overlapping resources.
In some embodiments, the first RAT may be LTE and the second RAT may be NR. In such embodiments, the first sidelink may be a sidelink associated with LTE (also referred to as LTE sidelink) , and the second sidelink may be a sidelink associated with NR (also referred to as NR sidelink) . In such embodiments, the third sidelink control channel resource may be an NR PSCCH resource within the overlapping resources between the LTE sidelink resources and the NR sidelink resources. The third sidelink shared channel resource may be an NR PSSCH resource within the overlapping resources between the LTE sidelink resources and the NR sidelink resources.
In embodiments where the first sidelink is the LTE sidelink, a first sidelink control channel resource of the first sidelink may be an LTE PSCCH resource, and a first sidelink  shared channel resource of the first sidelink may be an LTE PSSCH resource. In addition, a first sub-channel of the first sidelink may be an LTE sub-channel.
In embodiments where the second sidelink is the NR sidelink, a second sidelink control channel resource of the second sidelink may be an NR PSCCH resource and a second sidelink shared channel resource of the second sidelink may be an NR PSSCH resource. In addition, a second sub-channel of the second sidelink may be an NR sub-channel.
Hereinafter, some embodiments of the present disclosure will be described by taking LTE sidelink and NR sidelink for example. It shall be understood that the solution of the present disclosure may be applied to other RATs than LTE and NR.
Determination of the third sidelink control channel resource
In some embodiments, the terminal device 110 may determine a first sidelink control channel resource of the first sidelink based on the configuration or pre-configuration of the first sidelink. In addition, the terminal device 110 may determine a second sidelink control channel resource of the second sidelink based on the configuration or pre-configuration of the second sidelink. In turn, the terminal device 110 may determine the third sidelink control channel resource which comprises symbols and RBs comprised in the first sidelink control channel resource. Alternatively, the terminal device 110 may determine the third sidelink control channel resource which comprises symbols and RBs comprised in the second sidelink control channel resource. This will be described with reference to Figs. 9A and 9B.
Figs. 9A and 9B illustrate an example of the third sidelink control resource in accordance with some embodiments of the present disclosure, respectively. In the example of Fig. 9A, the terminal device 110 reuses an LTE PSCCH resource unit as an NR PSCCH resource unit within overlapping resources 910 between an NR sidelink resource pool and an LTE sidelink resource pool. In other words, an NR PSCCH resource within the overlapping resources 910 comprises symbols and RBs comprised in an LTE PSCCH resource.
Specifically, as shown in Fig. 9A, NR PSCCH allocations are different between the overlapping resources 910 and non-overlapping resources 920. An NR PSCCH resource within the overlapping resources 910 comprises all symbols in a slot and two RBs. An NR PSCCH resource within the non-overlapping resources 920 comprises part of symbols in a slot and more than two RBs. In addition, a boundary of the NR PSCCH resource within the  overlapping resources 910 is aligned with a boundary of the LTE PSCCH resource.
In the example of Fig. 9B, the terminal device 110 determines an NR PSCCH resource within overlapping resources 930 based on an NR PSCCH resource configuration. In other words, an NR PSCCH resource within the overlapping resources 930 comprises symbols and RBs comprised in an NR PSCCH resource.
Specifically, as shown in Fig. 9B, a common configuration for NR PSCCH resources are used for both the overlapping resources 930 and non-overlapping resources 940. In time domain, an NR PSCCH resource within the overlapping sidelink resources 930 or non-overlapping resources 940 comprises a first number of symbols. The first number (represented by m) is equal to the number of symbols configured for an NR PSCCH resource. For example, m = sl-TimeResourcePSCCH or m = sl-TimeResourcePSCCH +1 (one AGC symbol) .
In frequency domain, each NR PSCCH resource contains a second number of RBs. The second number (represented by n) is equal to the number of RBs configured for an NR PSCCH resource. For example, n =sl-FreqResourcePSCCH. M and n are determined based on the common configuration for NR PSCCH resources within the overlapping resources 930 and non-overlapping resources 940. Alternatively, in other embodiments, m and n may be determined based on a dedicated configuration for the overlapping resource 930.
In addition, in the examples of Figs. 9A and 9B, each NR PSCCH resource is associated with an NR sub-channel. Mapping relationship between the NR PSCCH resource and the NR sub-channel is the same as that between an LTE PSCCH resource and corresponding LTE sub-channel.
The examples of Figs. 9A and 9B may simplify the resource sharing design between the two RATs and may avoid complicated coordination between the two RATs.
In some embodiments, the terminal device 110 may determine the third sidelink control channel resource based on at least one of the configuration or pre-configuration of the first sidelink or the configuration or pre-configuration of the second sidelink. In this way, a scheme may be achieved with less impact on legacy sidelink. In addition, potential conflict between the two RATs may be reduced.
In some embodiments, the configuration or pre-configuration of the first sidelink may indicate at least one of following:
● a first SCS of the first sidelink,
● the number of symbols of a first sidelink control channel resource of the first sidelink,
● the number of symbols of a first sidelink shared channel resource of the first sidelink,
● the number of symbols of the first sidelink within a subframe,
● the number of symbols for an AGC,
● the number of symbols for a GP,
● a start symbol of the first sidelink control channel resource,
● an end symbol of the first sidelink control channel resource,
● a start symbol of the first sidelink shared channel resource,
● an end symbol of the first sidelink shared channel resource,
● a start symbol of the first sidelink within a subframe, or
● an end symbol of the first sidelink within a subframe.
In some embodiments, the configuration or pre-configuration of the second sidelink may indicate at least one of following:
● a second SCS of the second sidelink,
● the number of symbols of the second sidelink control channel resource,
● the number of symbols of the second sidelink shared channel resource,
● the number of symbols of the second sidelink within a slot,
● the number of symbols for an AGC,
● the number of symbols for a GP,
● a start symbol of the second sidelink control channel resource,
● an end symbol of the second sidelink control channel resource,
● a start symbol of the second sidelink shared channel resource,
● an end symbol of the second sidelink shared channel resource,
● a start symbol of the second sidelink within a slot, or
● an end symbol of the second sidelink within a slot.
In some embodiments, the configuration or pre-configuration of the first type of sidelink resources may indicate at least one of following:
● a third SCS of the first type of sidelink resources,
● the number of symbols of the third sidelink control channel resource,
● the number of symbols of the third sidelink shared channel resource,
● the number of symbols of the first type of sidelink resources within a subframe or a slot,
● the number of symbols for an AGC,
● the number of symbols for a GP,
● a start symbol of the third sidelink control channel resource,
● an end symbol of the third sidelink control channel resource,
● a start symbol of the third sidelink shared channel resource,
● an end symbol of the third sidelink shared channel resource,
● a start symbol of the first type of sidelink resources within a subframe or a slot, or
● an end symbol of the first type of sidelink resources within a subframe or a slot.
In some embodiments, the configuration or pre-configuration of the first sidelink may indicate at least one of following:
● a first SCS of the first sidelink,
● the number of RBs of a first sidelink control channel resource of the first sidelink,
● the number of RBs of a first sub-channel of the first sidelink,
● a start RB of the first sidelink control channel resource,
● an end RB of the first sidelink control channel resource,
● a start RB of the first sub-channel, or
● an end RB of the first sub-channel.
In some embodiments, the configuration or pre-configuration of the second sidelink may indicate at least one of following:
● a second SCS of the second sidelink,
● the number of RBs of a second sidelink control channel resource of the second sidelink,
● the number of RBs of a second sub-channel of the second sidelink,
● a start RB of the second sidelink control channel resource,
● an end RB of the second sidelink control channel resource,
● a start RB of the second sub-channel, or
● an end RB of the second sub-channel.
In some embodiments, the configuration or pre-configuration of the first type of sidelink resources may indicate at least one of following:
● a third SCS of the first type of sidelink resources,
● the number of RBs of the third sidelink control channel resource,
● the number of RBs of a third sub-channel for the first type of sidelink resources,
● a start RB of the third sidelink control channel resource,
● an end RB of the third sidelink control channel resource,
● a start RB of the third sub-channel for the first type of sidelink resources, or
● an end RB of the third sub-channel for the first type of sidelink resources.
In some embodiments, in frequency domain, the terminal device 110 may determine a start RB or an end RB of the third sidelink control channel resource or the third sidelink shared channel resource to be aligned with at least one of the following:
● the start RB or an end RB of the first sidelink control channel resource of the first sidelink,
● the start RB or an end RB of the first sub-channel of the first sidelink,
● the start RB or an end RB of the second sidelink control channel resource of the second sidelink,
● the start RB or an end RB of the second sub-channel of the second sidelink,
● a common start RB or a common end RB of the first sub-channel and the second sub-channel,
● the start RB or an end RB of the third sidelink control channel resource, or
● the start RB or an end RB of the third sub-channel.
In some embodiments, in time domain, the terminal device 110 may determine a start symbol or an end symbol of the third sidelink control channel resource or the third sidelink shared channel resource to be aligned with at least one of the following:
● the start symbol or the end symbol of the first sidelink within the subframe,
● the start symbol or the end symbol of the second sidelink within the slot,
● the start symbol or the end symbol of the first sidelink shared channel resource of the first sidelink, or
● the start symbol or the end symbol of the first sidelink control channel resource of the first sidelink,
● the start symbol or the end symbol of the second sidelink shared channel resource of the second sidelink,
● the start symbol or the end symbol of the second sidelink control channel resource of the second sidelink,
● the start symbol or the end symbol of the third sidelink control channel resource,
● the start symbol or the end symbol of the third sidelink shared channel resource, or
● the start symbol or the end symbol of the first type of sidelink resources within a subframe or a slot.
In some embodiments, the third sidelink control channel resource may comprise a first number of symbols. Hereinafter, the first number may be represented by m.
In some embodiments, the first number may be equal to a first integer multiple of the number of symbols of the first sidelink control channel resource of the first sidelink. In some embodiments, the first integer multiple may be determined based on a first SCS of the first sidelink and a second SCS of the second sidelink.
Alternatively, in some embodiments, the first number may be equal to the first integer multiple of the number of symbols of the first sidelink shared channel resource of the first sidelink.
Alternatively, in some embodiments, the first number may be equal to the first integer multiple of the number of symbols of the first sidelink within a subframe.
Alternatively, in some embodiments, the first number may be equal to a difference between the first integer multiple and the number of symbols for the AGC and the guard period,
Alternatively, in some embodiments, the first number may be equal to the number of symbols of the second sidelink control channel resource of the second sidelink.
Alternatively, in some embodiments, the first number may be equal to the number of symbols of the second sidelink shared channel resource of the second sidelink.
Alternatively, in some embodiments, the first number may be equal to the number of symbols of the second sidelink within a slot.
Alternatively, in some embodiments, the first number may be equal to a difference between the number of symbols of the second sidelink control channel resource and the number of symbols for the AGC.
Alternatively, in some embodiments, the first number may be equal to a difference between the number of symbols of the second sidelink shared channel resource and the number of symbols for the AGC and the guard period.
Alternatively, in some embodiments, the first number may be equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC and the guard period.
Alternatively, in some embodiments, the first number may be equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC, the guard period and a sidelink feedback channel.
Alternatively, in some embodiments, the first number may be equal to the number of symbols of the third sidelink control channel resource or the number of symbols of the first  type of sidelink resources within a subframe or a slot.
In some embodiments, the third sidelink control channel resource may comprise a second number of RBs. Hereinafter, the second number may be represented by n.
In some embodiments, the second number may be equal to a second integer multiple of the number of RBs of the first sidelink control channel resource of the first sidelink. In some embodiments, the second integer multiple may be determined based on a first SCS of the first sidelink and a second SCS of the second sidelink.
Alternatively, in some embodiments, the second number may be equal to the second integer multiple of the number of RBs of the first sub-channel of the first sidelink.
Alternatively, in some embodiments, the second number may be equal to or less than the number of RBs of the first sub-channel of the first sidelink.
Alternatively, in some embodiments, the second number may be equal to or less than the number of RBs of the second sub-channel of the second sidelink.
Alternatively, in some embodiments, the second number may be equal to a difference between the number of RBs in the first sub-channel and the number of RBs in the first sidelink control channel resource.
Alternatively, in some embodiments, the second number may be equal to a least common multiple of the number of RBs of the first sub-channel and the number of RBs of the second sub-channel.
Alternatively, in some embodiments, the second number may be equal to a least common multiple of the number of RBs of the first sub-channel and the number of RBs of a third sub-channel for the first type of sidelink resources.
Alternatively, in some embodiments, the second number may be equal to the number of RBs of the third sidelink control channel resource.
Hereinafter, some examples of the third sidelink control channel resource will be described with reference to Figs. 10 A to 11B.
Figs. 10A to 10F illustrate an example of the third sidelink control channel resource in accordance with some embodiments of the present disclosure, respectively.
In the example of Fig. 10A, overlapping resources 1010 are between an NR sidelink resource pool and an LTE PSCCH resource pool. In time domain, each NR PSCCH resource within the overlapping resources 1010 comprises m symbols. M is equal to an integer multiple of the number of symbols of an LTE PSCCH resource. That is, m=14*t, where t is an integer. For example, t=1 and m=14.
In frequency domain, each NR PSCCH resource within the overlapping resources  1010 comprises n RBs. N is equal to an integer multiple of the number of RBs of an LTE PSCCH resource. That is, n=2*k, where k is an integer. For example, k=2 and n=4. In other words, the RBs may be used as two consecutive LTE PSCCH resources are assigned as RBs for one NR PSCCH resource within the overlapping resources 1010.
In the examples of Figs. 10B and 10C, an LTE SCS is different from an NR SCS. For example, the LTE SCS is equal to 15 kHz, and the NR SCS is equal to 30 kHz. In addition, each NR PSCCH resource within overlapping resources keeps the same bandwidth in frequency of an LTE PSCCH unit.
In time domain, each NR PSCCH resource within the overlapping resources comprises m symbols. M is equal to a first integer multiple of the number of symbols of an LTE PSCCH resource. That is, m=14*t, where t is an integer. Alternatively, m may be equal to a difference between the first integer multiple and the number of symbols for an AGC and a GP. That is, m = 14*t –the number of symbols for (AGC + GP) .
In frequency domain, each NR PSCCH resource within the overlapping resources comprises n RBs. N is determined based on the number of RBs of an LTE PSCCH resource and a ratio of the LTE SCS to the NR SCS. That is, n=2*k, where k is equal to the ratio of the LTE SCS to the NR SCS.
In the example of Fig. 10B, t=1 and m=14; k=1/2 and n=1. In other words, the resource may be used as an LTE PSCCH resource may be used as two NR PSCCH resources, i.e., an NR PSCCH resource # k and an NR PSCCH resource # s.
In the example of Fig. 10C, t=2 and m=28; k=1/2 and n=1. In other words, the resources may be used as an LTE PSCCH resource may be used as one NR PSCCH resource, i.e., an NR PSCCH resource # k, which is allocated on two consecutive slots.
In the example of Fig. 10D, in time domain, each NR PSCCH resource within overlapping resources comprises m symbols. M is equal to the number of symbols of an NR PSCCH resource. In other words, m is equal to the number of symbols configured for the NR PSCCH resource. For example, m =sl-TimeResourcePSCCH which may be equal to 2 or 3.
In frequency domain, the number of RBs in an LTE sub-channel is different from that of RBs in an LTE sub-channel. Hereinafter, the number of RBs in an LTE sub-channel is also referred to as an LTE sub-channel size or a sub-channel size for LTE sidelink. Similarly, the number of RBs in an NR sub-channel is also referred to as an NR sub-channel size or a sub-channel size for NR sidelink.
Each NR PSCCH resource within overlapping resources starts from a common  boundary of an LTE sub-channel and an NR sub-channel. For example, an NR PSCCH resource 1020 within the overlapping resources starts from a common boundary 1022 of an LTE sub-channel and an NR sub-channel. In other words, a start RB of the NR PSCCH resource 1020 is aligned with a common start RB of the LTE sub-channel and the NR sub-channel.
In addition, in frequency domain, each NR PSCCH resource comprises n RBs. N is equal to or less than the number of RBs of an LTE sub-channel. In the example of Fig. 10D, n is equal to the number of RBs of the LTE sub-channel. It shall be noted that in the example of Fig. 10D, each NR PSCCH resource contains resources used as LTE PSCCH and LTE PSSCH.
In the example of Fig. 10E, in time domain, similar to the example of Fig. 10D, each NR PSCCH resource within overlapping resources comprises m symbols, where m is equal to the number of symbols of an NR PSCCH resource. In other words, m is equal to the number of symbols configured for the NR PSCCH resource. For example, m =sl-TimeResourcePSCCH which may be equal to 2 or 3. The symbols of the NR PSCCH resource is start after the AGC symbol, i.e., the start symbol of the NR PSCCH is the second symbol in a slot as the first symbol is for AGC.
In frequency domain, each NR PSCCH resource within overlapping resources starts from an upper boundary of a LTE PSCCH resource. In other words, a start RB of the NR PSCCH resource is aligned with an end RB of an LTE PSCCH resource. Each NR PSCCH resource comprises n RBs. N is equal to a difference between the number of RBs in an LTE sub-channel and the number of RBs in an LTE PSCCH resource. For example, the number of RBs in the LTE sub-channel may be 15, the number of RBs in the LTE PSCCH resource is 2, and n=15-2=13. It shall be noted that in the example of Fig. 10E, each NR PSCCH contains resources used as an LTE PSSCH resource.
In the example of Fig. 10F, different sidelink configurations are used for overlapping resources and non-overlapping resources (also referred to as dedicated resources) .
In time domain, each NR PSCCH resource within the overlapping resources comprises m symbols. As shown in Fig. 10F, m is equal to a difference between the number of symbols of the NR sidelink within a slot and the number of symbols for an AGC and a GP. For example, if the number of symbols for the AGC and the GP is equal to 2, m = sl-LengthSymbols-2, sl-LengthSymbols is the number of symbols of the NR sidelink within a slot.
Alternatively, m may be equal to the number of symbols of the NR sidelink within a slot. For example, m = sl-LengthSymbols. Alternatively, m may be equal to a difference between the number of symbols of an NR PSCCH resource and the number of symbols for the AGC. For example, if the number of symbols for the AGC is equal to 1, m = sl-TimeResourcePSCCH-1. Alternatively, m may be equal to a difference between the number of symbols of the NR sidelink and the number of symbols for the AGC, the GP and a sidelink feedback channel. For example, if the number of symbols for the AGC and the GP is equal to 2 and the number of symbols related to the sidelink feedback channel is equal to 3, m = sl-LengthSymbols-2-3.
In addition, in time domain, a location of the m symbols is determined to be the same as that of SL symbols for the NR PSSCH resource.
In frequency domain, each NR PSCCH resource within overlapping resources starts from a lower boundary of an LTE PSCCH resource. In other words, a start RB of the NR PSCCH resource is aligned with a start RB of an LTE PSCCH resource. Each NR PSCCH resource comprises n RBs. N is equal to the number of RBs of the LTE PSCCH resource.
In some embodiments, the first number (represented by m) and the second number (represented by n) may be configured or pre-configured for the third sidelink control channel resource. This will be described with reference to Fig. 11A.
Fig. 11A illustrates an example of the third sidelink control resource in accordance with some embodiments of the present disclosure. In this example, two NR PSCCH resources (such as NR PSCCH resources #k and #s) are contained in a resource which may be also used as an LTE sub-channel. In time domain, each NR PSCCH resource within overlapping resources comprises m symbols in a slot, where m is equal to the number of symbols in a slot for the LTE sidelink and m is pre-configured by a network device. For example, m=7.
In frequency domain, each NR PSCCH resource within overlapping resources comprises n RBs, where n is pre-configured by a network device. For example, n=6. Alternatively, n may be equal to a least common multiple of the number of RBs for an LTE PSCCH resource and the number of RBs for an NR PSCCH resource of non-overlapping resources.
The example of Fig. 11A may provide more flexible configuration for NR PSCCH resources within the shared resources.
In some embodiments, the first number (represented by m) and the second number  (represented by n) may be implicitly determined based on the configuration or pre-configuration of the first sidelink and the configuration or pre-configuration of the second sidelink. This will be described with reference to Fig. 11B.
Fig. 11B illustrates an example of the third sidelink control resource in accordance with some embodiments of the present disclosure. In this example, an LTE SCS is equal to 15 kHz, and an NR SCS is equal to 60 kHz. In time domain, each NR PSCCH resource within overlapping resources comprises m symbols, where m is equal to an integer multiple of the number of symbols of the LTE sidelink within a subframe. In other words, m = 14*t, where t is equal to a ratio of the NR SCS to the LTE SCS. For example, m=14*4=64.
In frequency domain, each NR PSCCH resource within the overlapping resources comprises n RBs, where n is equal to the number of RBs in an LTE sub-channel, as shown in Fig. 11B. Alternatively, n may be equal to a product of the ratio of the NR SCS to the LTE SCS and the number of RBs of an LTE PSCCH resource.
The example of Fig. 11B provides a slot-bundling-like NR PSCCH resource scheme which may benefit the case that different SCSs are used for the two RATs;
Determination of the third sidelink shared channel resource
In some embodiments, the third sidelink shared channel resource may comprise a third number of symbols. Hereinafter, the third number may be represented by p.
In some embodiments, the third number may be equal to the first integer multiple of the number of symbols of a first sidelink shared channel resource of the first sidelink. In some embodiments, the first integer multiple may be determined based on a first SCS of the first sidelink and a second SCS of the second sidelink.
Alternatively, in some embodiments, the third number may be equal to the first integer multiple of the number of symbols of the first sidelink within a subframe.
Alternatively, in some embodiments, the third number may be equal to a difference between the first integer multiple and the number of symbols for an AGC and a GP.
Alternatively, in some embodiments, the third number may be equal to the number of symbols of a second sidelink control channel resource of the second sidelink.
Alternatively, in some embodiments, the third number may be equal to the number of symbols of a second sidelink shared channel resource of the second sidelink.
Alternatively, in some embodiments, the third number may be equal to the number of symbols of the second sidelink within a slot.
Alternatively, in some embodiments, the third number may be equal to a difference  between the number of symbols of the second sidelink control channel resource and the number of symbols for the AGC.
Alternatively, in some embodiments, the third number may be equal to a difference between the number of symbols of the second sidelink shared channel resource and the number of symbols for the AGC and the guard period.
Alternatively, in some embodiments, the third number may be equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC and a GP.
Alternatively, in some embodiments, the third number may be equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC, the GP and a sidelink feedback channel.
Alternatively, in some embodiments, the third number may be equal to the number of symbols of the third sidelink shared channel resource or the number of symbols of the first type of sidelink resources within a subframe or a slot.
In some embodiments, the third sidelink shared channel resource may comprise an integer multiple of a fourth number of RBs. The fourth number is the number of RBs comprised in the third sub-channel for the first type of sidelink resources. Hereinafter, the fourth number may be represented by q.
In some embodiments, the fourth number may be equal to the second integer multiple of the number of RBs of the first sidelink control channel resource of the first sidelink. In some embodiments, the second integer multiple may be determined based on a first SCS of the first sidelink and a second SCS of the second sidelink.
Alternatively, in some embodiments, the fourth number may be equal to the second integer multiple of the number of RBs of the first sub-channel of the first sidelink.
Alternatively, in some embodiments, the fourth number may be equal to or less than the number of RBs of the first sub-channel of the first sidelink.
Alternatively, in some embodiments, the fourth number may be equal to or less than the number of RBs of the second sub-channel of the second sidelink.
Alternatively, in some embodiments, the fourth number may be equal to a difference between the number of RBs in the first sub-channel and the number of RBs in the first sidelink control channel resource.
Alternatively, in some embodiments, the fourth number may be equal to a least common multiple of the number of RBs of the first sub-channel and the number of RBs of the second sub-channel.
Alternatively, in some embodiments, the fourth number may be equal to the number of RBs of the third sidelink control channel resource.
Alternatively, in some embodiments, the fourth number may be equal to the number of RBs of the third sub-channel.
Hereinafter, some examples of the third sidelink shared channel resource will be described with reference to Figs. 12 A to 13F.
Figs. 12A to 12D illustrate an example of the third sidelink shared channel resource in accordance with some embodiments of the present disclosure, respectively.
In the example of Fig. 12A, different sidelink configurations are used for overlapping resources and non-overlapping resources (also referred to as dedicated resources) with an NR sidelink resource pool. An LTE sub-channel configuration is reused for overlapping resources.
In time domain, each NR PSSCH resource within the overlapping resources comprises p symbols. P is equal to the number of symbols of the LTE sidelink within a subframe.
In frequency domain, an LTE SCS is equal to an NR SCS. An LTE sub-channel size is different from an NR sub-channel size. Hereinafter, the LTE sub-channel size may be represented by L LTE and the NR sub-channel size may be represented by L NR. For example, as shown in Fig. 12A, L NR=2 L LTE. An LTE sub-channel configuration is reused within the overlapping resources. In other words, the NR sub-channel size within overlapping resources, represented by L NRovr, L NRovr = L LTE, each NR sub-channel within the overlapping resources comprises q RBs, where q is equal to the number of RBs of an LTE sub-channel.
In addition, a boundary between the overlapping resources and the non-overlapping resources is aligned with a boundary of the LTE sub-channel or the NR sub-channel.
The example of Fig. 12B is similar to the example of Fig. 12A in that different sidelink configurations are used for overlapping resources and non-overlapping resources with an NR sidelink resource pool. In time domain, each NR PSSCH resource within the overlapping resources comprises p symbols, where p is equal to the number of symbols of the LTE sidelink within a subframe.
The example of Fig. 12B is also similar to the example of Fig. 12A in that in frequency domain, an LTE SCS is equal to an NR SCS and an LTE sub-channel size is different from an NR sub-channel size.
The example of Fig. 12B is different from the example of Fig. 12A in that a first boundary between the overlapping resources and the non-overlapping resources is not aligned with a second boundary of the LTE sub-channel or a third boundary of the NR sub-channel. Thus, there is a gap between the first boundary and the second boundary or the third boundary. The number of RBs in the gap (also referred to as GP RBs) is greater than zero and less than the LTE sub-channel size or the NR sub-channel size. The GP RBs may not be used for NR sidelink signal transmission.
In the example of Fig. 12C, a common sidelink configuration is used for overlapping resources and non-overlapping resources with an NR sidelink resource pool. The common sidelink configuration is the same as the NR sidelink configuration. In other words, an NR sub-channel configuration is reused for the overlapping resources. Hereinafter, the number of RBs of a sub-channel for both the overlapping resources and the non-overlapping resources is represented by L NRcom.
In time domain, each NR PSSCH resource within the overlapping resources comprises p symbols. P may be equal to the number of symbols of the NR sidelink within a slot. It should be understood that the symbols of the NR sidelink within a slot comprises symbols for the AGC and GP. For example, p= sl-LengthSymbols, as shown in Fig. 12C.
Alternatively, p may be equal to the number of symbols of an NR PSSCH resource. For example, the symbols of the NR PSSCH resource may not comprise symbols for the AGC and GP. In this case, if the number of symbols for the AGC and the GP is equal to 2, p= sl-LengthSymbols-2. For another example, the symbols of the NR PSSCH resource may not comprise symbols for the AGC, the GP and a sidelink feedback channel. In this case, if the number of symbols for the AGC and the GP is equal to 2 and the number of symbols related to the sidelink feedback channel is equal to 3, p = sl-LengthSymbols-2-3.
In frequency domain, each NR PSSCH resource within the overlapping resources comprises q RBs, where q is equal to the number of RBs of an NR sub-channel. In other words, q=L NR. Because the common sidelink configuration is the same as the NR sidelink configuration, L NRcom= L NR.
In addition, it shall be noted that in the example of Fig. 12C, a boundary of an LTE sub-channel and an NR sub-channel may be not aligned.
In the example of Fig. 12D, different sidelink configurations are used for overlapping resources and non-overlapping resources with an NR sidelink resource pool.
In time domain, each NR PSSCH resource within the overlapping resources comprises p symbols. P is equal to the number of symbols of the NR sidelink within a slot.
In frequency domain, different sub-channel sizes are used for the overlapping resources and the non-overlapping resources. In other words, the number (represented by L NRovr) of RBs of a sub-channel for the overlapping resources is different from the number (represented by L NRnov) of RBs of a sub-channel for the non-overlapping resources. For example, L NRovr = L LTE =10, and L NRnov = 20.
In the example of Fig. 13A, NR PSSCH resources within overlapping resources are determined based on LTE PSSCH resource scheme.
In time domain, each NR PSSCH resource within the overlapping resources comprises p symbols. P is equal to the number of symbols of the LTE sidelink within a subframe.
In frequency domain, each NR PSSCH resource comprises an integer multiple of q RBs. Q is the number of RBs comprised in the third sub-channel for the overlapping resources. In the example of Fig. 13A, q is equal to a least common multiple of the number of RBs of the LTE sub-channel and the number of RBs of the NR sub-channel. In other words, q = a least common multiple of (L LTE, L NRcom) . For example, if L LTE = 10 and L NRcom = 20, q=20. In addition, a boundary of the NR sub-channel within overlapping resources is aligned with that of the LTE sub-channel within the overlapping resources.
The example of Fig. 13B is similar to the example of Fig. 13A in that NR PSSCH resources within the overlapping resources are determined based on LTE PSSCH resource scheme. In time domain, each NR PSSCH resource within the overlapping resources comprises p symbols. P is equal to the number of symbols of the LTE sidelink within a subframe.
The example of Fig. 13B is different from the example of Fig. 13A in that each NR PSSCH resource comprises an integer multiple of q RBs, where q is equal to a least common multiple of the number of RBs of the LTE sub-channel and the number of RBs of a sub-channel for the non-overlapping resources. In other words, q = a least common multiple of (L LTE, L NRnov) . For example, if L LTE = 10 and L NRnov = 15, q=30.
The examples of Figs. 13A and 13B may produce less impact on both LTE and NR. In addition, aligning boundary of sub-channels may avoid potential conflict.
In the example of Fig. 13C, NR PSSCH resources within overlapping resources are determined based on SCS configurations and LTE PSSCH resource scheme.
In time domain, each NR PSSCH resource within the overlapping resources comprises p symbols. P is equal to an integer multiple of the number of symbols of the LTE sidelink within a subframe. For example, p=14*t, where t represents the integer multiple. In  the example of Fig. 13C, t=1 and p=14.
In frequency domain, an LTE SCS is different from an NR SCS. For example, the LTE SCS is equal to 15 kHz, and the NR SCS is equal to 30 kHz. Each NR PSSCH resource comprises an integer multiple of q RBs. Q is the number of RBs comprised in the third sub-channel for the overlapping resources. In the example of Fig. 13C, q is equal to the number of RBs of the LTE sub-channel. For example, q=L LTE=10.
In the example of Fig. 13D, NR PSSCH resources within overlapping resources are also determined based on SCS configurations and LTE PSSCH resource scheme.
In time domain, each NR PSSCH resource within the overlapping resources comprises p symbols. P is equal to an integer multiple of the number of symbols of the LTE sidelink within a subframe. For example, p=14*t, where t represents the integer multiple. In the example of Fig. 13D, t=2 and p=28.
In frequency domain, an LTE SCS is different from an NR SCS. For example, the LTE SCS is equal to 15 kHz, and the NR SCS is equal to 30 kHz. Each NR PSSCH resource comprises an integer multiple of q RBs. Q is the number of RBs comprised in the third sub-channel for the overlapping resources. In the example of Fig. 13D, q is equal to a product of the number of RBs of the LTE sub-channel and a ratio of the LTE SCS to the NR SCS. For example, if L LTE=10 and the ratio of the LTE SCS to the NR SCS =1/2, q=5.
In some embodiments, the sub-channel size for NR PSSCH resources within overlapping resources may be determined based on the LTE sub-channel size. In such embodiments, the LTE sub-channel size may be determined as one of sub-channel sizes in a first set, and the sub-channel size for NR PSSCH resources may be determined as one of sub-channel sizes in a second set associated with the first set. Table 1 shows an example of the first set and the second set.
Table 1
LTE sub-channel size in the first set Available NR sub-channel size in the second set
5, 10, 15, 20, 25, 30, 50, 75, 100 10, 15, 20, 25, 50, 75, 100
4, 8, 12, 16, 48, 72, 96 12
6, 9, 18 NA
As shown in Table 1, for example, if the LTE sub-channel size is determined as 5, the sub-channel size for NR PSSCH resources may be determined as one of 10, 15, 20, 25, 50, 75 and 100. For another example, if the LTE sub-channel size is determined as one of 6,  9 and 18, there is no available sub-channel size for NR PSSCH resources.
In the example of Fig. 13E, NR PSSCH resources within overlapping resources are determined based on LTE PSCCH and PSSCH configuration as well as NR sidelink configuration.
In time domain, each NR PSSCH resource within the overlapping resources comprises p symbols. P may be equal to the number of symbols of the NR sidelink within a slot. For example, p= sl-LengthSymbols.
In frequency domain, the resources which may be used as LTE PSCCH resources are excluded. Each NR PSSCH resource comprises an integer multiple of q RBs. Q is the number of RBs comprised in the third sub-channel (i.e., NR sub-channel) for the overlapping resources. Each NR sub-channel for the overlapping resources starts from an upper boundary of a LTE PSCCH resource. In other words, a start RB of the each NR sub-channel within overlapping resources is aligned with an end RB of an LTE PSCCH resource. In the example of Fig. 13E, q is equal to a difference between the number of RBs in the LTE sub-channel and the number of RBs in an LTE PSCCH resource. That is, q= L LTE –the number of RBs in an LTE PSCCH resource. If L LTE=15 and the number of RBs in an LTE PSCCH resource=2, q=13.
In the example of Fig. 13F, dedicated sidelink configurations are used for overlapping resources and non-overlapping resources with an NR sidelink resource pool. NR PSSCH resources are determined based on dedicated sidelink configurations for the overlapping resources and non-overlapping resources.
In time domain, each NR PSSCH resource within the overlapping resources comprises p symbols. P is equal to the number of symbols of the LTE sidelink within a subframe. Each NR PSSCH resource within the non-overlapping resources comprises w symbols. W the number of symbols of the NR sidelink within a slot. For example, w=sl-LengthSymbols.
In frequency domain, each NR PSSCH resource within overlapping resources comprises an integer multiple of q RBs. Q is the number of RBs comprised in the third sub-channel for the overlapping resources. For example, q=L NRovr. Each NR PSSCH resource within non-overlapping resources comprises an integer multiple of v RBs. V is the number of RBs comprised in a sub-channel for the non-overlapping resources. For example, v=L NRnov.
Fig. 14 illustrates a flowchart of an example method in accordance with some embodiments of the present disclosure. In some embodiments, the method 1400 can be  implemented at a network device, such as one of the  network devices  140 and 150 as shown in Fig. 1. For the purpose of discussion, the method 1400 will be described with reference to Fig. 1 as performed by the network device 140 without loss of generality.
At block 1410, the network device 140 determines at least one of a third sidelink control channel resource and a third sidelink shared channel resource within a first type of sidelink resources. The first type of sidelink resources can be used for both a first sidelink associated with a first RAT and a second sidelink associated with a second RAT.
At block 1420, the network device 140 transmits a configuration of the at least one of the third sidelink control channel resource and the third sidelink shared channel resource.
In some embodiments, determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises determining at least one of following:
● the number of symbols of the third sidelink control channel resource,
● the number of symbols of the third sidelink shared channel resource,
● a start symbol of the third sidelink control channel resource,
● an end symbol of the third sidelink control channel resource,
● a start symbol of the third sidelink shared channel resource,
● an end symbol of the third sidelink shared channel resource,
In some embodiments, determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises determining at least one of following:
● the number of RBs of the third sidelink control channel resource,
● the number of RBs of a third sub-channel for the first type of sidelink resources,
● a start RB of the third sidelink control channel resource,
● an end RB of the third sidelink control channel resource,
● a start RB of the third sub-channel for the first type of sidelink resources, or
● an end RB of the third sub-channel for the first type of sidelink resources.
In some embodiments, determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource based on at least one of the following: a configuration or pre-configuration of the first sidelink, a configuration or pre-configuration of the second sidelink, or a configuration or pre-configuration of the first type of sidelink resources.
In some embodiments, determining the third sidelink control channel resource comprises at least one of the following: determining the third sidelink control channel resource which comprises symbols and RBs comprised in a first sidelink control channel resource of the first sidelink, or determining the third sidelink control channel resource which comprises symbols and RBs comprised in a second sidelink control channel resource of the second sidelink.
In some embodiments, the first sidelink control channel resource of the first sidelink is determined based on the configuration or pre-configuration of the first sidelink; and the second sidelink control channel resource of the second sidelink is determined based on the configuration or pre-configuration of the second sidelink.
In some embodiments, the configuration or pre-configuration of the first sidelink indicates at least one of following:
● a first SCS of the first sidelink,
● the number of symbols of a first sidelink control channel resource of the first sidelink,
● the number of symbols of a first sidelink shared channel resource of the first sidelink,
● the number of symbols of the first sidelink within a subframe,
● the number of symbols for an automatic gain control (AGC) ,
● the number of symbols for a guard period,
● a start symbol of the first sidelink control channel resource,
● an end symbol of the first sidelink control channel resource,
● a start symbol of the first sidelink shared channel resource,
● an end symbol of the first sidelink shared channel resource,
● a start symbol of the first sidelink within a subframe, or
● an end symbol of the first sidelink within a subframe.
In some embodiments, the configuration or pre-configuration of the second sidelink indicates at least one of following:
● the second SCS of the second sidelink,
● the number of symbols of the second sidelink control channel resource,
● the number of symbols of the second sidelink shared channel resource,
● the number of symbols of the second sidelink within a slot,
● the number of symbols for the AGC,
● the number of symbols for the guard period,
● a start symbol of the second sidelink control channel resource,
● an end symbol of the second sidelink control channel resource,
● a start symbol of the second sidelink shared channel resource,
● an end symbol of the second sidelink shared channel resource,
● a start symbol of the second sidelink within a slot, or
● an end symbol of the second sidelink within a slot.
In some embodiments, the configuration or pre-configuration of the first type of sidelink resources indicates at least one of following:
● a third SCS of the first type of sidelink resources,
● the number of symbols of the first type of sidelink resources within a subframe or a slot,
● the number of symbols for the AGC,
● the number of symbols for the guard period,
● a start symbol of the first type of sidelink resources within a subframe or a slot, or
● an end symbol of the first type of sidelink resources within a subframe or a slot.
In some embodiments, the configuration or pre-configuration of the first sidelink indicates at least one of following:
● a first SCS of the first sidelink,
● the number of RBs of a first sidelink control channel resource of the first sidelink,
● the number of RBs of a first sub-channel of the first sidelink,
● a start RB of the first sidelink control channel resource,
● an end RB of the first sidelink control channel resource,
● a start RB of the first sub-channel, or
● an end RB of the first sub-channel.
In some embodiments, the configuration or pre-configuration of the second sidelink indicates at least one of following:
● a second SCS of the second sidelink,
● the number of RBs of a second sidelink control channel resource of the second sidelink,
● the number of RBs of the second sub-channel of the second sidelink,
● a start RB of the second sidelink control channel resource,
● an end RB of the second sidelink control channel resource,
● a start RB of the second sub-channel, or
● an end RB of the second sub-channel.
In some embodiments, the configuration or pre-configuration of the first type of sidelink resources indicates a third SCS of the first type of sidelink resources.
In some embodiments, determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises: determining a start symbol or an end symbol of the third sidelink control channel resource or the third sidelink shared channel resource to be aligned with at least one of the following:
● the start symbol or the end symbol of the first sidelink within a subframe,
● the start symbol or the end symbol of the second sidelink within a slot,
● the start symbol or the end symbol of the first sidelink shared channel resource of the first sidelink, or
● the start symbol or the end symbol of the first sidelink control channel resource of the first sidelink,
● the start symbol or the end symbol of the second sidelink shared channel resource of the second sidelink,
● the start symbol or the end symbol of the second sidelink control channel resource of the second sidelink, or
● the start symbol or the end symbol of the first type of sidelink resources within a subframe or a slot.
In some embodiments, determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises at least one of the following: determining the third sidelink control channel resource which comprises a first number of symbols, or determining the third sidelink shared channel resource which comprises a third number of symbols.
In some embodiments, the first number is equal to a first integer multiple of the number of symbols of a first sidelink control channel resource of the first sidelink.
Alternatively, in some embodiments, the first number or the third number is equal to the first integer multiple of the number of symbols of a first sidelink shared channel resource of the first sidelink.
Alternatively, in some embodiments, the first number or the third number is equal to the first integer multiple of the number of symbols of the first sidelink within a subframe.
Alternatively, in some embodiments, the first number or the third number is equal to  a difference between the first integer multiple and the number of symbols for an AGC and a guard period.
Alternatively, in some embodiments, the first number or the third number is equal to the number of symbols of a second sidelink control channel resource of the second sidelink.
Alternatively, in some embodiments, the first number or the third number is equal to the number of symbols of a second sidelink shared channel resource of the second sidelink.
Alternatively, in some embodiments, the first number or the third number is equal to the number of symbols of the second sidelink within a slot.
Alternatively, in some embodiments, the first number or the third number is equal to a difference between the number of symbols of the second sidelink control channel resource and the number of symbols for the AGC.
Alternatively, in some embodiments, the first number or the third number is equal to a difference between the number of symbols of the second sidelink shared channel resource and the number of symbols for the AGC and the guard period.
Alternatively, in some embodiments, the first number or the third number is equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC and a guard period.
Alternatively, in some embodiments, the first number or the third number is equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC. the guard period and a sidelink feedback channel.
Alternatively, in some embodiments, the first number is equal to the number of symbols of the first type of sidelink resources within a subframe or a slot.
Alternatively, in some embodiments, the third number is equal to the number of symbols of the first type of sidelink resources within a subframe or a slot.
In some embodiments, determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises: determining a start RB or an end RB of the third sidelink control channel resource or the third sidelink shared channel resource to be aligned with at least one of the following:
● the start RB or the end RB of the first sidelink control channel resource of the first sidelink,
● the start RB or the end RB of the first sub-channel of the first sidelink, or
● the start RB or the end RB of the second sidelink control channel resource of the second sidelink,
● the start RB or the end RB of the second sub-channel of the second sidelink,  or
● a common start RB or a common end RB of the first sub-channel and the second sub-channel.
In some embodiments, determining at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises at least one of the following: determining the third sidelink control channel resource which comprises a second number of RBs, or determining the third sidelink shared channel resource which comprises an integer multiple of a fourth number of RBs, the fourth number being the number of RBs comprised in the third sub-channel.
In some embodiments, the second number or the fourth number is equal to the second integer multiple of the number of RBs of the first sidelink control channel resource of the first sidelink.
Alternatively, in some embodiments, the second number or the fourth number is equal to the second integer multiple of the number of RBs of the first sub-channel of the first sidelink.
Alternatively, in some embodiments, the second number or the fourth number is equal to or less than the number of RBs of the first sub-channel of the first sidelink.
Alternatively, in some embodiments, the second number or the fourth number is equal to or less than the number of RBs of the second sub-channel of the second sidelink.
Alternatively, in some embodiments, the second number or the fourth number is equal to a difference between the number of RBs in the first sub-channel and the number of RBs in the first sidelink control channel resource.
Alternatively, in some embodiments, the second number or the fourth number is equal to a least common multiple of the number of RBs of the first sub-channel and the number of RBs of the second sub-channel.
In some embodiments, the first integer multiple is determined based on a first SCS of the first sidelink and a second SCS of the second sidelink.
In some embodiments, the second integer multiple is determined based on a first SCS of the first sidelink and a second SCS of the second sidelink.
The embodiments which have been described with reference to Figs. 9A to 13F are also applied to the method 1400. The details of the embodiments are omitted for brevity.
Fig. 15 is a simplified block diagram of a device 1500 that is suitable for implementing some embodiments of the present disclosure. The device 1500 can be  considered as a further example embodiment of one of the  terminal devices  110, 120 and 130, or one of the  network devices  140 and 150 as shown in Fig. 1. Accordingly, the device 1500 can be implemented at or as at least a part of one of the  terminal devices  110, 120 and 130, or one of the  network devices  140 and 150.
As shown, the device 1500 includes a processor 1510, a memory 1520 coupled to the processor 1510, a suitable transmitter (TX) and receiver (RX) 1540 coupled to the processor 1510, and a communication interface coupled to the TX/RX 1540. The memory 1520 stores at least a part of a program 1530. The TX/RX 1540 is for bidirectional communications. The TX/RX 1540 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2 interface for bidirectional communications between gNBs or eNBs, S1 interface for communication between a Mobility Management Entity (MME) /Serving Gateway (S-GW) and the gNB or eNB, Un interface for communication between the gNB or eNB and a relay node (RN) , or Uu interface for communication between the gNB or eNB and a terminal device.
The program 1530 is assumed to include program instructions that, when executed by the associated processor 1510, enable the device 1500 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to Figs. 1 to 16. The embodiments herein may be implemented by computer software executable by the processor 1510 of the device 1500, or by hardware, or by a combination of software and hardware. The processor 1510 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 1510 and memory 1520 may form processing means 1550 adapted to implement various embodiments of the present disclosure.
The memory 1520 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1520 is shown in the device 1500, there may be several physically distinct memory modules in the device 1500. The processor 1510 may be of any type suitable to the local technical network, 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 device 1500 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 components included in the apparatuses and/or devices of the present disclosure may be implemented in various manners, including software, hardware, firmware, or any combination thereof. In one embodiment, one or more units may be implemented using software and/or firmware, for example, machine-executable instructions stored on the storage medium. In addition to or instead of machine-executable instructions, parts or all of the units in the apparatuses and/or devices may be implemented, at least in part, by one or more hardware logic components. For example, and without limitation, illustrative types of hardware logic components that can be used include Field-programmable Gate Arrays (FPGAs) , Application-specific Integrated Circuits (ASICs) , Application-specific Standard Products (ASSPs) , System-on-a-chip systems (SOCs) , Complex Programmable Logic Devices (CPLDs) , and the like.

Claims (20)

  1. A method for sidelink communications, comprising:
    determining, at a terminal device, at least one of a third sidelink control channel resource and a third sidelink shared channel resource within a first type of sidelink resources based on at least one of the following:
    a configuration or pre-configuration of a first sidelink associated with a first radio access technology (RAT) ,
    a configuration or pre-configuration of a second sidelink associated with a second RAT, or
    a configuration or pre-configuration of the first type of sidelink resources, wherein the first type of sidelink resources can be used for both the first sidelink and the second sidelink; and
    transmitting or receiving a sidelink signal on the at least one of the third sidelink control channel resource and the third sidelink shared channel resource.
  2. The method of claim 1, wherein determining the third sidelink control channel resource comprises at least one of the following:
    determining the third sidelink control channel resource which comprises symbols and resource blocks (RBs) comprised in a first sidelink control channel resource of the first sidelink, or
    determining the third sidelink control channel resource which comprises symbols and RBs comprised in a second sidelink control channel resource of the second sidelink,
    wherein:
    the first sidelink control channel resource of the first sidelink is determined based on the configuration or pre-configuration of the first sidelink; and
    the second sidelink control channel resource of the second sidelink is determined based on the configuration or pre-configuration of the second sidelink.
  3. The method of claim 1, wherein:
    the configuration or pre-configuration of the first sidelink indicates at least one of following:
    a first subcarrier space (SCS) of the first sidelink,
    the number of symbols of a first sidelink control channel resource of the first  sidelink,
    the number of symbols of a first sidelink shared channel resource of the first sidelink,
    the number of symbols of the first sidelink within a subframe,
    the number of symbols for an automatic gain control (AGC) ,
    the number of symbols for a guard period,
    a start symbol of the first sidelink control channel resource,
    an end symbol of the first sidelink control channel resource,
    a start symbol of the first sidelink shared channel resource,
    an end symbol of the first sidelink shared channel resource,
    a start symbol of the first sidelink within a subframe,
    an end symbol of the first sidelink within a subframe,
    the configuration or pre-configuration of the second sidelink indicates at least one of following:
    a second SCS of the second sidelink,
    the number of symbols of a second sidelink control channel resource of the second sidelink,
    the number of symbols of a second sidelink shared channel resource of the second sidelink,
    the number of symbols of the second sidelink within a slot,
    the number of symbols for the AGC,
    the number of symbols for the guard period,
    a start symbol of the second sidelink control channel resource,
    an end symbol of the second sidelink control channel resource,
    a start symbol of the second sidelink shared channel resource,
    an end symbol of the second sidelink shared channel resource,
    a start symbol of the second sidelink within a slot,
    an end symbol of the second sidelink within a slot, or
    the configuration or pre-configuration of the first type of sidelink resources indicates at least one of following:
    a third SCS of the first type of sidelink resources,
    the number of symbols of the third sidelink control channel resource,
    the number of symbols of the third sidelink shared channel resource,
    the number of symbols of the first type of sidelink resources within a subframe  or a slot,
    the number of symbols for the AGC,
    the number of symbols for the guard period,
    a start symbol of the third sidelink control channel resource,
    an end symbol of the third sidelink control channel resource,
    a start symbol of the third sidelink shared channel resource,
    an end symbol of the third sidelink shared channel resource,
    a start symbol of the first type of sidelink resources within a subframe or a slot, or
    an end symbol of the first type of sidelink resources within a subframe or a slot.
  4. The method of claim 1, wherein:
    the configuration or pre-configuration of the first sidelink indicates at least one of following:
    a first subcarrier space (SCS) of the first sidelink,
    the number of RBs of a first sidelink control channel resource of the first sidelink,
    the number of RBs of a first sub-channel of the first sidelink,
    a start RB of the first sidelink control channel resource,
    an end RB of the first sidelink control channel resource,
    a start RB of the first sub-channel,
    an end RB of the first sub-channel,
    the configuration or pre-configuration of the second sidelink indicates at least one of following:
    a second SCS of the second sidelink,
    the number of RBs of a second sidelink control channel resource of the second sidelink,
    the number of RBs of a second sub-channel of the second sidelink,
    a start RB of the second sidelink control channel resource,
    an end RB of the second sidelink control channel resource,
    a start RB of the second sub-channel,
    an end RB of the second sub-channel, or
    the configuration or pre-configuration of the first type of sidelink resources indicates  at least one of following:
    a third SCS of the first type of sidelink resources,
    the number of RBs of the third sidelink control channel resource,
    the number of RBs of a third sub-channel for the first type of sidelink resources,
    a start RB of the third sidelink control channel resource,
    an end RB of the third sidelink control channel resource,
    a start RB of the third sub-channel for the first type of sidelink resources, or
    an end RB of the third sub-channel for the first type of sidelink resources.
  5. The method of claim 3, wherein determining at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises:
    determining a start symbol or an end symbol of the third sidelink control channel resource or the third sidelink shared channel resource to be aligned with at least one of the following:
    the start symbol or the end symbol of the first sidelink within the subframe,
    the start symbol or the end symbol of the second sidelink within the slot,
    the start symbol or the end symbol of the first sidelink shared channel resource of the first sidelink, or
    the start symbol or the end symbol of the first sidelink control channel resource of the first sidelink,
    the start symbol or the end symbol of the second sidelink shared channel resource of the second sidelink,
    the start symbol or the end symbol of the second sidelink control channel resource of the second sidelink,
    the start symbol or the end symbol of the third sidelink control channel resource,
    the start symbol or the end symbol of the third sidelink shared channel resource, or
    the start symbol or the end symbol of the first type of sidelink resources within the subframe or the slot.
  6. The method of claim 3, wherein determining at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises at least  one of the following:
    determining the third sidelink control channel resource which comprises a first number of symbols, or
    determining the third sidelink shared channel resource which comprises a third number of symbols; and
    wherein:
    the first number is equal to a first integer multiple of the number of symbols of the first sidelink control channel resource of the first sidelink,
    the first number or the third number is equal to the first integer multiple of the number of symbols of the first sidelink shared channel resource of the first sidelink,
    the first number or the third number is equal to the first integer multiple of the number of symbols of the first sidelink within a subframe,
    the first number or the third number is equal to a difference between the first integer multiple and the number of symbols for the AGC and the guard period,
    the first number or the third number is equal to the number of symbols of the second sidelink control channel resource of the second sidelink,
    the first number or the third number is equal to the number of symbols of the second sidelink shared channel resource of the second sidelink,
    the first number or the third number is equal to the number of symbols of the second sidelink within a slot,
    the first number or the third number is equal to a difference between the number of symbols of the second sidelink control channel resource and the number of symbols for the AGC,
    the first number or the third number is equal to a difference between the number of symbols of the second sidelink shared channel resource and the number of symbols for the AGC and the guard period,
    the first number or the third number is equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC and the guard period,
    the first number or the third number is equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC, the guard period and a sidelink feedback channel,
    the first number is equal to the number of symbols of the third sidelink control channel resource or the number of symbols of the first type of sidelink resources within a  subframe or a slot, or
    the third number is equal to the number of symbols of the third sidelink shared channel resource or the number of symbols of the first type of sidelink resources within a subframe or a slot.
  7. The method of claim 4, wherein determining at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises:
    determining a start RB or an end RB of the third sidelink control channel resource or the third sidelink shared channel resource to be aligned with at least one of the following:
    the start RB or the end RB of the first sidelink control channel resource of the first sidelink,
    the start RB or the end RB of the first sub-channel of the first sidelink, or
    the start RB or the end RB of the second sidelink control channel resource of the second sidelink,
    the start RB or the end RB of the second sub-channel of the second sidelink,
    a common start RB or a common end RB of the first sub-channel and the second sub-channel,
    the start RB or the end RB of the third sidelink control channel resource, or
    the start RB or the end RB of the third sub-channel.
  8. The method of claim 4, wherein determining at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises at least one of the following:
    determining the third sidelink control channel resource which comprises a second number of RBs, or
    determining the third sidelink shared channel resource which comprises an integer multiple of a fourth number of RBs, the fourth number being the number of RBs comprised in the third sub-channel; and
    wherein:
    the second number or the fourth number is equal to a second integer multiple of the number of RBs of the first sidelink control channel resource of the first sidelink,
    the second number or the fourth number is equal to the second integer multiple of the number of RBs of the first sub-channel of the first sidelink,
    the second number or the fourth number is equal to or less than the number of RBs of the first sub-channel of the first sidelink,
    the second number or the fourth number is equal to or less than the number of RBs of the second sub-channel of the second sidelink,
    the second number or the fourth number is equal to a difference between the number of RBs in the first sub-channel and the number of RBs in the first sidelink control channel resource,
    the second number or the fourth number is equal to a least common multiple of the number of RBs of the first sub-channel and the number of RBs of the second sub-channel,
    the second number is equal to a least common multiple of the number of RBs of the first sub-channel and the number of RBs of a third sub-channel for the first type of sidelink resources,
    the second number is equal to the number of RBs of the third sidelink control channel resource, or
    the fourth number is equal to the number of RBs of the third sub-channel.
  9. A method for sidelink communications, comprising:
    determining, at a network device, at least one of a third sidelink control channel resource and a third sidelink shared channel resource within a first type of sidelink resources, wherein the first type of sidelink resources can be used for both a first sidelink associated with a first radio access technology (RAT) and a second sidelink associated with a second RAT; and
    transmitting a configuration of the at least one of the third sidelink control channel resource and the third sidelink shared channel resource.
  10. The method of claim 9, wherein determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises determining at least one of following:
    the number of symbols of the third sidelink control channel resource,
    the number of symbols of the third sidelink shared channel resource,
    a start symbol of the third sidelink control channel resource,
    an end symbol of the third sidelink control channel resource,
    a start symbol of the third sidelink shared channel resource, or
    an end symbol of the third sidelink shared channel resource.
  11. The method of claim 9, wherein determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises determining at least one of following:
    the number of RBs of the third sidelink control channel resource,
    the number of RBs of a third sub-channel for the first type of sidelink resources,
    a start RB of the third sidelink control channel resource,
    an end RB of the third sidelink control channel resource,
    a start RB of the third sub-channel for the first type of sidelink resources, or
    an end RB of the third sub-channel for the first type of sidelink resources.
  12. The method of claim 9, wherein determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource based on at least one of the following:
    a configuration or pre-configuration of the first sidelink,
    a configuration or pre-configuration of the second sidelink, or
    a configuration or pre-configuration of the first type of sidelink resources.
  13. The method of claim 12, wherein determining the third sidelink control channel resource comprises at least one of the following:
    determining the third sidelink control channel resource which comprises symbols and RBs comprised in a first sidelink control channel resource of the first sidelink, or
    determining the third sidelink control channel resource which comprises symbols and RBs comprised in a second sidelink control channel resource of the second sidelink,
    wherein:
    the first sidelink control channel resource of the first sidelink is determined based on the configuration or pre-configuration of the first sidelink; and
    the second sidelink control channel resource of the second sidelink is determined based on the configuration or pre-configuration of the second sidelink.
  14. The method of claim 12, wherein:
    the configuration or pre-configuration of the first sidelink indicates at least one of  following:
    a first subcarrier space (SCS) of the first sidelink,
    the number of symbols of a first sidelink control channel resource of the first sidelink,
    the number of symbols of a first sidelink shared channel resource of the first sidelink,
    the number of symbols of the first sidelink within a subframe,
    the number of symbols for an automatic gain control (AGC) ,
    the number of symbols for a guard period,
    a start symbol of the first sidelink control channel resource,
    an end symbol of the first sidelink control channel resource,
    a start symbol of the first sidelink shared channel resource,
    an end symbol of the first sidelink shared channel resource,
    a start symbol of the first sidelink within a subframe,
    an end symbol of the first sidelink within a subframe,
    the configuration or pre-configuration of the second sidelink indicates at least one of following:
    a second SCS of the second sidelink,
    the number of symbols of a second sidelink control channel resource of the second sidelink,
    the number of symbols of a second sidelink shared channel resource of the second sidelink,
    the number of symbols of the second sidelink within a slot,
    the number of symbols for an AGC,
    the number of symbols for a guard period,
    a start symbol of the second sidelink control channel resource,
    an end symbol of the second sidelink control channel resource,
    a start symbol of the second sidelink shared channel resource,
    an end symbol of the second sidelink shared channel resource,
    a start symbol of the second sidelink within a slot,
    an end symbol of the second sidelink within a slot,
    the configuration or pre-configuration of the first type of sidelink resources indicates at least one of following:
    a third SCS of the first type of sidelink resources,
    the number of symbols of the first type of sidelink resources within a subframe or a slot,
    the number of symbols for an AGC,
    the number of symbols for a guard period,
    a start symbol of the first type of sidelink resources within a subframe or a slot, or
    an end symbol of the first type of sidelink resources within a subframe or a slot.
  15. The method of claim 12, wherein:
    the configuration or pre-configuration of the first sidelink indicates at least one of following:
    a first subcarrier space (SCS) of the first sidelink,
    the number of RBs of a first sidelink control channel resource of the first sidelink,
    the number of RBs of a first sub-channel of the first sidelink,
    a start RB of the first sidelink control channel resource,
    an end RB of the first sidelink control channel resource,
    a start RB of the first sub-channel,
    an end RB of the first sub-channel,
    the configuration or pre-configuration of the second sidelink indicates at least one of following:
    a second SCS of the second sidelink,
    the number of RBs of a second sidelink control channel resource of the second sidelink,
    the number of RBs of a second sub-channel of the second sidelink,
    a start RB of the second sidelink control channel resource,
    an end RB of the second sidelink control channel resource,
    a start RB of the second sub-channel,
    an end RB of the second sub-channel,
    the configuration or pre-configuration of the first type of sidelink resources indicates a third SCS of the first type of sidelink resources.
  16. The method of claim 14, wherein determining the at least one of the third  sidelink control channel resource and the third sidelink shared channel resource comprises:
    determining a start symbol or an end symbol of the third sidelink control channel resource or the third sidelink shared channel resource to be aligned with at least one of the following:
    the start symbol or the end symbol of the first sidelink within the subframe,
    the start symbol or the end symbol of the second sidelink within the slot,
    the start symbol or the end symbol of the first sidelink shared channel resource of the first sidelink, or
    the start symbol or the end symbol of the first sidelink control channel resource of the first sidelink,
    the start symbol or the end symbol of the second sidelink shared channel resource of the second sidelink,
    the start symbol or the end symbol of the second sidelink control channel resource of the second sidelink, or
    the start symbol or the end symbol of the first type of sidelink resources within the subframe or the slot.
  17. The method of claim 14, wherein determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises at least one of the following:
    determining the third sidelink control channel resource which comprises a first number of symbols, or
    determining the third sidelink shared channel resource which comprises a third number of symbols; and
    wherein:
    the first number is equal to a first integer multiple of the number of symbols of the first sidelink control channel resource of the first sidelink,
    the first number or the third number is equal to the first integer multiple of the number of symbols of the first sidelink shared channel resource of the first sidelink,
    the first number or the third number is equal to the first integer multiple of the number of symbols of the first sidelink within a subframe,
    the first number or the third number is equal to a difference between the first integer multiple and the number of symbols for the AGC and the guard period,
    the first number or the third number is equal to the number of symbols of the second  sidelink control channel resource of the second sidelink,
    the first number or the third number is equal to the number of symbols of the second sidelink shared channel resource of the second sidelink,
    the first number or the third number is equal to the number of symbols of the second sidelink within a slot,
    the first number or the third number is equal to a difference between the number of symbols of the second sidelink control channel resource and the number of symbols for the AGC,
    the first number or the third number is equal to a difference between the number of symbols of the second sidelink shared channel resource and the number of symbols for the AGC and the guard period,
    the first number or the third number is equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC and the guard period,
    the first number or the third number is equal to a difference between the number of symbols of the second sidelink within a slot and the number of symbols for the AGC, the guard period and a sidelink feedback channel,
    the first number is equal to the number of symbols of the first type of sidelink resources within a subframe or a slot, or
    the third number is equal to the number of symbols of the first type of sidelink resources within a subframe or a slot.
  18. The method of claim 15, wherein determining the at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises:
    determining a start RB or an end RB of the third sidelink control channel resource or the third sidelink shared channel resource to be aligned with at least one of the following:
    the start RB or the end RB of the first sidelink control channel resource of the first sidelink,
    the start RB or the end RB of the first sub-channel of the first sidelink, or
    the start RB or the end RB of the second sidelink control channel resource of the second sidelink,
    the start RB or the end RB of the second sub-channel of the second sidelink, or
    a common start RB or a common end RB of the first sub-channel and the  second sub-channel.
  19. The method of claim 15, wherein determining at least one of the third sidelink control channel resource and the third sidelink shared channel resource comprises at least one of the following:
    determining the third sidelink control channel resource which comprises a second number of RBs, or
    determining the third sidelink shared channel resource which comprises an integer multiple of a fourth number of RBs, the fourth number being the number of RBs comprised in the third sub-channel; and
    wherein:
    the second number or the fourth number is equal to a second integer multiple of the number of RBs of the first sidelink control channel resource of the first sidelink,
    the second number or the fourth number is equal to the second integer multiple of the number of RBs of the first sub-channel of the first sidelink,
    the second number or the fourth number is equal to or less than the number of RBs of the first sub-channel of the first sidelink,
    the second number or the fourth number is equal to or less than the number of RBs of the second sub-channel of the second sidelink,
    the second number or the fourth number is equal to a difference between the number of RBs in the first sub-channel and the number of RBs in the first sidelink control channel resource, or
    the second number or the fourth number is equal to a least common multiple of the number of RBs of the first sub-channel and the number of RBs of the second sub-channel.
  20. A communication device, comprising:
    a processor; and
    a memory coupled to the processor and storing instructions thereon, the instructions, when executed by the processor, causing the terminal device to perform the method according to any of claims 1-8 or any of claims 9-19.
PCT/CN2022/101325 2022-06-24 2022-06-24 Method, device and computer readable medium for sidelink communications Ceased WO2023245677A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190274121A1 (en) * 2018-03-01 2019-09-05 Qualcomm Incorporated Multi-radio access technology scheduling of sidelink interface
CN111034309A (en) * 2018-08-10 2020-04-17 联发科技股份有限公司 Multiplexing of Physical Sidelink Control Channel (PSCCH) and Physical Sidelink Shared Channel (PSSCH)
CN111800872A (en) * 2019-04-05 2020-10-20 株式会社Kt Method and device for transmitting and receiving side link HARQ feedback information
CN114080845A (en) * 2019-07-09 2022-02-22 三星电子株式会社 Apparatus and method for selecting resources in wireless communication system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190274121A1 (en) * 2018-03-01 2019-09-05 Qualcomm Incorporated Multi-radio access technology scheduling of sidelink interface
CN111034309A (en) * 2018-08-10 2020-04-17 联发科技股份有限公司 Multiplexing of Physical Sidelink Control Channel (PSCCH) and Physical Sidelink Shared Channel (PSSCH)
CN111800872A (en) * 2019-04-05 2020-10-20 株式会社Kt Method and device for transmitting and receiving side link HARQ feedback information
CN114080845A (en) * 2019-07-09 2022-02-22 三星电子株式会社 Apparatus and method for selecting resources in wireless communication system

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