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WO2021035580A1 - Retour de harq sur la base de cbg de liaison latérale et retransmissions associées sur des ressources réservées - Google Patents

Retour de harq sur la base de cbg de liaison latérale et retransmissions associées sur des ressources réservées Download PDF

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Publication number
WO2021035580A1
WO2021035580A1 PCT/CN2019/103097 CN2019103097W WO2021035580A1 WO 2021035580 A1 WO2021035580 A1 WO 2021035580A1 CN 2019103097 W CN2019103097 W CN 2019103097W WO 2021035580 A1 WO2021035580 A1 WO 2021035580A1
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WIPO (PCT)
Prior art keywords
sidelink
code block
transmission
communication device
feedback
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/103097
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English (en)
Inventor
Dong Li
Yong Liu
Torsten WILDSCHEK
Jun Tan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Shanghai Bell Co Ltd
Nokia Solutions and Networks Oy
Nokia Technologies Oy
Original Assignee
Nokia Shanghai Bell Co Ltd
Nokia Solutions and Networks Oy
Nokia Technologies Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Nokia Shanghai Bell Co Ltd, Nokia Solutions and Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co Ltd
Priority to PCT/CN2019/103097 priority Critical patent/WO2021035580A1/fr
Priority to CN201980099809.5A priority patent/CN114287115B/zh
Publication of WO2021035580A1 publication Critical patent/WO2021035580A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • 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

Definitions

  • the teachings in accordance with the exemplary embodiments of this invention relate generally to a sidelink transmission and retransmission and, more specifically, relate to sidelink transmission and retransmissions using code block group based HARQ feedback associated with a sidelink transmission.
  • CBGFI code block group feedback information
  • CBGTI code block group transmission information
  • DCI downlink control information
  • PRB physical resource block
  • PSCCH physical sidelink control channel
  • PSSCH physical sidelink shared channel
  • PSFCH physical sidelink feedback channel
  • SCI sidelink control information
  • SFCI sidelink feedback control information
  • TBS transport block size
  • V2X communications can be based on communication technologies such as "sidelink" communication technologies. For this, sidelink resource pools and sidelink channels can be established for vehicles participating in such communications.
  • sidelink communication technologies for V2X communications can be referred as Device-to-Device (D2D) communication technology and used for example Proximity-based Services (ProSe) communication.
  • D2D Device-to-Device
  • ProSe Proximity-based Services
  • a network device located in a vehicle may perform the V2X communications using a resource allocated by a base station or a resource autonomously selected within a resource pool configured by the base station when sidelink/D2D communication technologies are applied.
  • the base station may also adjust V2X communication parameters such as to try to achieve a maximum transmission power and/or range based on channel congestion.
  • a network device located in a vehicle may perform the V2X communications using the radio interface (e.g. Uu interface in LTE or 5G cellular network) with a base station to communicate with another V2X communication network device or V2X service application server through a wireless network.
  • the radio interface e.g. Uu interface in LTE or 5G cellular network
  • Example embodiments of the invention work to implement improved operations associated with devices performing at least these operations as described above.
  • a method comprises performing, by a first communication device, using a resource reservation a sidelink transmission towards a second communication device for a transport block associated with the sidelink transmission; and performing in response to receiving hybrid automatic repeat request (HARQ) feedback for the sidelink transmission, at least one sidelink retransmission for code block groups of the transport block that are negatively acknowledged using partial or all reserved resources of the resource reservation.
  • HARQ hybrid automatic repeat request
  • a further example embodiment of the invention is a method comprising the method of the previous paragraph, wherein the sidelink transmission comprises: a sidelink control channel transmission conveying sidelink control information associated with the sidelink transmission; and a sidelink shared channel transmission conveying code blocks associated with the transport block, wherein performing the sidelink transmission comprises: determining code block segmentation of the transport block; determining a number of code block groups associated with code blocks obtained by the code block segmentation; and determining the reserved resources for the retransmission for the code block groups of transport block, wherein performing the sidelink transmission further comprises: setting code block group relevant information fields in the sidelink control information based on the determined code block segmentation and code block group number associated with the mentioned transport block; and setting resource reservation relevant information fields in the sidelink control information based on the determined reserved resources for potential retransmission associated with the mentioned transport block; generating sidelink control channel and sidelink shared channel; and transmitting the sidelink control channel and the sidelink shared channel for the sidelink transmission over the sidelink towards the second communication device, wherein the hybrid automatic repeat request feedback
  • an apparatus comprises means for performing, by a first communication device, using a resource reservation a sidelink transmission towards a second communication device for a transport block associated with the sidelink transmission; and means for performing in response to receiving hybrid automatic repeat request (HARQ) feedback for the sidelink transmission, at least one sidelink retransmission for code block groups of the transport block that are negatively acknowledged using partial or all reserved resources of the resource reservation.
  • HARQ hybrid automatic repeat request
  • a further example embodiment of the invention is an apparatus comprising the apparatus of the previous paragraph, wherein the sidelink transmission comprises: a sidelink control channel transmission conveying sidelink control information associated with the sidelink transmission; and a sidelink shared channel transmission conveying code blocks associated with the transport block, wherein performing the sidelink transmission comprises: determining code block segmentation of the transport block; determining a number of code block groups associated with code blocks obtained by the code block segmentation; and determining the reserved resources for the retransmission for the code block groups of transport block, wherein performing the sidelink transmission further comprises: setting code block group relevant information fields in the sidelink control information based on the determined code block segmentation and code block group number associated with the mentioned transport block; and setting resource reservation relevant information fields in the sidelink control information based on the determined reserved resources for potential retransmission associated with the mentioned transport block; generating sidelink control channel and sidelink shared channel; and transmitting the sidelink control channel and the sidelink shared channel for the sidelink transmission over the sidelink towards the second communication device, wherein the hybrid automatic repeat request feedback comprises
  • an apparatus comprises one or more processors and one or more memories including computer program code.
  • the one or more memories and the computer program code configured, with the one or more processors, to cause the apparatus to at least: perform, by a first communication device, using a resource reservation a sidelink transmission towards a second communication device for a transport block associated with the sidelink transmission; and perform in response to receiving hybrid automatic repeat request (HARQ) feedback for the sidelink transmission, at least one sidelink retransmission for code block groups of the transport block that are negatively acknowledged using partial or all reserved resources of the resource reservation.
  • HARQ hybrid automatic repeat request
  • Another example embodiment of the invention comprises a computer program comprising code for performing, by a first communication device, using a resource reservation a sidelink transmission towards a second communication device for a transport block associated with the sidelink transmission; and performing in response to receiving hybrid automatic repeat request (HARQ) feedback for the sidelink transmission, at least one sidelink retransmission for code block groups of the transport block that are negatively acknowledged using partial or all reserved resources of the resource reservation.
  • HARQ hybrid automatic repeat request
  • a method comprises monitoring, by a third communication device, a sidelink control channel used for a sidelink transmission from a first communication device; monitoring a sidelink feedback channel for feedback to the sidelink transmission from a second communication device; and based on monitored parameters used for the sidelink transmission and the feedback, performing resource selection for a sidelink transmission.
  • Other example embodiments of the invention include a method comprising the method of the previous paragraph, wherein the parameters comprise information of a reserved resource used for the sidelink transmission and the feedback, wherein the third communication device derives from the parameters the partial or all resources to be used for sidelink retransmission and the remaining resources of the reserved resource to be implicitly released, wherein the monitoring comprises: decoding the sidelink control channel and acquiring from the sidelink control information the resource reservation information for sidelink retransmission and code block group relevant information, wherein the processing comprises: detecting the sidelink feedback channel and acquiring from the sidelink feedback control information the information of code block group based hybrid automatic repeat request feedback, wherein performing resource selection for the sidelink transmission comprises: taking into account in the resource selection for the sidelink transmission, as effectively reserved at least one of: resources reserved by the first communication device, resources monitored by the third communication device, and resources to be used by a number of negatively acknowledged code block groups indicated by the code block group based hybrid automatic repeat request feedback, and wherein any remaining reserved resources are implicitly released, wherein the resource selection is
  • an apparatus comprises means for monitoring, by a third communication device, a sidelink control channel used for a sidelink transmission from a first communication device; means for monitoring a sidelink feedback channel for feedback to the sidelink transmission from a second communication device; and means, based on monitored parameters from the sidelink control channel and the sidelink feedback channel relevant to a sidelink retransmission, for performing resource selection for a sidelink transmission.
  • Additional example embodiments of the invention include an apparatus comprising the apparatus of the previous paragraph, wherein the parameters comprise information of a reserved resource used for the sidelink transmission and the feedback, wherein the third communication device derives from the parameters the partial or all resources to be used for sidelink retransmission and the remaining resources to be implicitly released, wherein the means for monitoring comprises: decoding the sidelink control channel and acquiring from the sidelink control information the resource reservation information for sidelink retransmission and code block group relevant information, wherein the means for processing comprises: means for detecting the sidelink feedback channel and means for acquiring from the sidelink feedback control information the information of code block group based hybrid automatic repeat request feedback, wherein means for performing resource selection for the sidelink transmission comprises: means, taking into account in the resource selection for the sidelink transmission, as effectively reserved for at least one of: resources reserved by the first communication device, resources monitored by the third communication device, and resources to be used by a number of negatively acknowledged code block groups indicated by the code block group based hybrid automatic repeat request feedback, and wherein any remaining reserved resources are implicitly
  • an apparatus comprises one or more processors and one or more memories including computer program code.
  • the one or more memories and the computer program code configured, with the one or more processors, to cause the apparatus to at least: monitor, by a third communication device, a sidelink control channel used for a sidelink transmission from a first communication device; monitor a sidelink feedback channel for feedback to the sidelink transmission from a second communication device; and based on monitored parameters from the sidelink control channel and the sidelink feedback channel relevant to a sidelink retransmission, perform resource selection for a sidelink transmission
  • Another example embodiment of the invention comprises a computer program comprising code for monitoring, by a third communication device, a sidelink control channel used for a sidelink transmission from a first communication device; monitoring a sidelink feedback channel for feedback to the sidelink transmission from a second communication device; and based on monitored parameters from the sidelink control channel and the sidelink feedback channel relevant to a sidelink retransmission, performing resource selection for a sidelink transmission.
  • FIG. 1A shows a flow chart of one example embodiment of invention
  • FIG. 1B shows a Table with associated values of a transport block size, a code block group number, and control information bits for an operation in accordance with example embodiments of the invention
  • FIG. 2 shows sidelink transmission and retransmission operations over a partial reserved resource in accordance with an example embodiment of the invention, and with shrinking reserved resources in frequency;
  • FIG. 3 shows sidelink transmission and retransmission operations over partial reserved resource in accordance with an example embodiment of the invention, and with shrinking reserved resources in time;
  • FIG. 4 shows a sidelink operation between vehicles in accordance with example embodiments of the invention
  • FIG. 5 illustrates a simplified block diagram of exemplary electronic devices that are suitable for use in practicing various exemplary embodiments of this invention.
  • FIG. 6A and FIG. 6B each show a method which may be practiced by an apparatus in accordance with an example embodiment of the invention.
  • LTE V2X sidelink was defined in LTE R14 to support direct communication of basic road safety services between vehicle and vehicle/pedestrian/infrastructure.
  • V2X sidelink was further enhanced with the features of carrier aggregation, higher order modulation and latency reduction to support more diversified services and more stringent service requirements.
  • the data packet size is variant greatly in a large dynamic range depending on the specific V2X service e.g. from hundreds of bytes to tens of thousands of bytes.
  • the TB may contain a relatively large number of code blocks and in this case the CBG-based HARQ feedback can effectively improve the retransmission resource efficiency.
  • the Rel-16 NR V2X work item it was agreed at RAN1-97 that for the same packet transport block, prior transmission can reserve resource for next retransmission for HARQ feedback based PSSCH.
  • the CBG-based HARQ feedback channel PSFCH shall be decodable and understandable not only by the its target receiver (i.e. the transmitter of the data packet PSSCH) , but also by other UEs that are sensing sidelink channels; and
  • prior transmission can reserve resources for the next retransmission for HARQ feedback based PSSCH.
  • how to make the retransmissions based on the CBG-based HARQ feedback over the reserved resources is still an open issue.
  • the invention aims to address the technical challenges and requirements as discussed above.
  • Inventive aspects in accordance with example embodiments of the invention include at least the following:
  • the sidelink retransmission may only occupy partial of the reserved resources based on the specific CBG-based HARQ feedback and release the other reserved resources, as in Step 3 as described hereafter.
  • the originally reserved resources corresponding to the entire packet TB size are gradually released over the multiple (re) transmissions of the TB.
  • the resource efficiency is greatly improved and this makes sense especially for the large packet TB size.
  • FIG. 5 shows a block diagram of one possible and non-limiting exemplary system in which the exemplary embodiments may be practiced.
  • FIG. 5 shows a block diagram of one possible and non-limiting exemplary system in which the exemplary embodiments may be practiced.
  • a network node NN 110 and a network node NN 90 of which either are for example a user equipment UE.
  • RAN radio access network
  • the NN 110 and the NN 90 are in wireless communication with a wireless network 100.
  • the NN 110 and the NN 90 are typically wireless mobile devices such as UEs that can access the wireless network 100.
  • the UEs may include a mobile phone (or called a "cellular" phone) and/or a computer with a mobile terminal function.
  • the UE or mobile terminal may also be a portable, pocket, handheld, computer-embedded or vehicle-mounted mobile device and performs a language signaling and/or data exchange with the RAN.
  • the NN 110 includes one or more processors 120, one or more memories 125, and one or more transceivers 130 interconnected through one or more buses 127.
  • Each of the one or more transceivers 130 includes a receiver, Rx, 132 and a transmitter, Tx, 133.
  • the one or more buses 127 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, fiber optics or other optical communication equipment, and the like.
  • the one or more transceivers 130 are connected to one or more antennas 128.
  • the one or more memories 125 include computer program code 123.
  • the NN 110 includes a CBG module 140, comprising one of or both parts 140-1 and/or 140-2, which may be implemented in a number of ways.
  • the CBG module 140 can be configured to cause the NN 110 to perform operations in accordance with example embodiments of the invention as disclosed herein.
  • the CBG module 140 may be implemented in hardware as CBG module 140-1, such as being implemented as part of the one or more processors 120.
  • the CBG module 140-1 may be implemented also as an integrated circuit or through other hardware such as a programmable gate array.
  • the CBG module 140 may be implemented as CBG module 140-2, which is implemented as computer program code 123 and is executed by the one or more processors 120.
  • the one or more memories 125 and the computer program code 123 may be configured, with the one or more processors 120, to cause the NN 110 to perform one or more of the operations as described herein.
  • the NN 110 communicates with RAN node 170 and/or the NN 90 via a wireless link 111 and/or link 176 and/or link 81.
  • the RAN node 170 is a network node such as a base station that provides access by wireless devices such as the NN 110 to the wireless network 100.
  • the RAN node 170 may be, for instance, a base station for 5G, also called New Radio (NR) .
  • the RAN node 170 may be a NG-RAN node, which is defined as either a gNB or an ng-eNB.
  • the RAN node 170 includes one or more processors 152, one or more memories 155, one or more network interfaces (N/W I/F (s) ) 161, and one or more transceivers 160 interconnected through one or more buses 157.
  • Each of the one or more transceivers 160 includes a receiver, Rx, 162 and a transmitter, Tx, 163.
  • the one or more transceivers 160 are connected to one or more antennas 158.
  • the one or more memories 155 include computer program code 153.
  • the RAN node 170 includes a CBG module 150, comprising one of or both parts 150-1 and/or 150-2, which may be implemented as a sidelink relay for sidelink communications between communication devices of a network as in accordance with example embodiments of the invention.
  • the CBG module 150 can be configured to cause the RAN node 170 to perform operations in accordance with example embodiments of the invention as disclosed herein.
  • the CBG module 150 may be implemented in hardware as CBG module 150-1, such as being implemented as part of the one or more processors 152.
  • the CBG module 150-1 may be implemented also as an integrated circuit or through other hardware such as a programmable gate array.
  • the CBG module 150 may be implemented as CBG module 150-2, which is implemented as computer program code 153 and is executed by the one or more processors 152.
  • the one or more memories 155 and the computer program code 153 are configured, with the one or more processors 152, to cause the RAN node 170 to perform one or more of the operations as described herein.
  • the NN 90 is a network node, such as for example another user equipment or an access device such as a base station.
  • the NN 90 includes one or more processors 75, one or more memories 71, one or more network interfaces (N/W I/F (s) ) 80, and though not shown, it is noted that the (N/W I/F (s) ) 80 of the NN 90 includes one or more transceivers interconnected through one or more buses 85.
  • the NN 90 has one or more transceivers each connected to an antenna and including a receiver, Rx, and a transmitter.
  • the one or more transceivers of the NN 90 are connected to one or more antennas.
  • the one or more transceivers of the NN 90 may be implemented as a remote radio head (RRH) .
  • the one or more memories 71 include computer program code 73 and is executed by at least Processor (s) 75.
  • the NN 90 includes a CBG module 50, comprising one of or both parts 50-1 and/or 50-2, which may be implemented in a number of ways.
  • the CBG module 50 can be configured to cause the NN 90 to perform operations in accordance with example embodiments of the invention as disclosed herein.
  • the CBG module 50 may be implemented in hardware as CBG module 50-1, such as being implemented as part of the one or more processors 75.
  • the CBG module 50-1 may be implemented also as an integrated circuit or through other hardware such as a programmable gate array.
  • the CBG module 50 may be implemented as CBG module 50-2, which is implemented as computer program code 73 and is executed by the one or more processors 75.
  • the one or more memories 71 and the computer program code 73 are configured, with the one or more processors 75, to cause the NN 90 to perform one or more of the operations as described herein.
  • the one or more network interfaces N/W I/F (s) 161 and 80 can communicate over a network such as via the links 176 and/or 81.
  • Two or more of RAN nodes, such as the RAN node 170 communicate and/or the NN 90 may be using, e.g., link 176 or 81.
  • the link 176 may be wired or wireless or both and may implement, e.g., an Xn interface for 5G, an X2 interface for LTE, or other suitable interface for other standards.
  • the one or more buses such as the one or more buses 157 of RAN node 170 and/or the one or more buses of NN 90 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, fiber optics or other optical communication equipment, wireless channels, and the like.
  • the one or more transceivers 160 may be implemented as a remote radio head (RRH) such as the RRH 195 for LTE or for gNB implementation for 5G, with the other elements of the RAN node 170 possibly being physically in a different location from the RRH, and the one or more buses 157 could be implemented in part as, e.g., fiber optic cable or other suitable network connection to connect the other elements of the RAN node 170 or the NN 90 to an RRH such as the RRH 195.
  • RRH remote radio head
  • the RAN node 170 may include a gNB node for providing NR user plane and control plane protocol terminations towards the UE, and connected via the NG interface to a 5GC (e.g., the network element (s) 190) .
  • the RAN node 170 may include an ng-eNB node for providing E-UTRA user plane and control plane protocol terminations towards the UE, and connected via the NG interface to the 5GC.
  • each cell can correspond to a single carrier and a base station may use multiple carriers. So if there are three 120 degree cells per carrier and two carriers, then the base station has more than one cell. It is further noted that a single cell may have multiple Transmission Reception Points (TRxPs or TRPs) that are used in order to form the cell.
  • TRxPs Transmission Reception Points
  • the wireless network 100 may include a network element 190 or elements that may include core network functionality, and which provides connectivity via at least a link 181 or link 176 or link 131 with a further network, such as a telephone network and/or a data communications network (e.g., the Internet) .
  • a further network such as a telephone network and/or a data communications network (e.g., the Internet) .
  • core network functionality for 5G may include access and mobility management function (s) (AMF (s) ) and/or user plane functions (UPF (s) ) and/or session management function (s) (SMF (s) ) .
  • AMF access and mobility management function
  • UPF user plane functions
  • SMF session management function
  • Such core network functionality by the network element 190 may include a MME (Mobility Management Entity) /SGW (Serving Gateway) functionality for LTE and similar functionality for 5G. These are merely exemplary functions that may be supported by the network element (s) of the network 100, and note that both 5G and LTE functions might be supported.
  • the RAN node 170 is coupled via a link 131 to a network element 190 and the NN 90 is connected via link 181 to the network element 190.
  • the link 131 and/or link 181 may be implemented as, e.g., an NG interface for 5G, or an S1 interface for LTE, or other suitable interface for other standards.
  • the network element 190 includes one or more processors 175, one or more memories 171, and one or more network interfaces (N/W I/F (s) ) 180, interconnected through one or more buses 185.
  • the one or more memories 171 include computer program code 173.
  • the one or more memories 171 and the computer program code 173 are configured, with the one or more processors 175, to cause the network element 190 to perform one or more operations, such as operations in accordance with example embodiments of the invention as described herein.
  • the wireless network 100 may implement network virtualization, which is the process of combining hardware and software network resources and network functionality into a single, software-based administrative entity, a virtual network.
  • Network virtualization involves platform virtualization, often combined with resource virtualization.
  • Network virtualization is categorized as either external, combining many networks, or parts of networks, into a virtual unit, or internal, providing network-like functionality to software containers on a single system. Note that the virtualized entities that result from the network virtualization are still implemented, at some level, using hardware such as processors 152 and/or 75 and/or 175 and memories 155 and/or 71 and/or 171, and also such virtualized entities create technical effects.
  • the computer readable memories 125, 155, 171, and 71 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • the computer readable memories 125, 155, 171, and 71 may be means for performing storage functions.
  • the processors 120, 152, 175, and 75 may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on a multi-core processor architecture, as non-limiting examples.
  • the processors 120, 152, 175, and 75 may be means for performing functions, such as controlling the NN 110, RAN node 170, NN 90, and other functions as described herein.
  • the various embodiments of the user equipment 110 can include, but are not limited to, cellular telephones such as smart phones, tablets, personal digital assistants (PDAs) having wireless communication capabilities, portable computers having wireless communication capabilities, image capture devices such as digital cameras having wireless communication capabilities, gaming devices having wireless communication capabilities, music storage and playback appliances having wireless communication capabilities, Internet appliances (including Internet of Things devices) permitting wireless Internet access and possibly browsing, tablets with wireless communication capabilities, as well as portable units or terminals that incorporate combinations of such functions.
  • PDAs personal digital assistants
  • portable computers having wireless communication capabilities
  • image capture devices such as digital cameras having wireless communication capabilities
  • gaming devices having wireless communication capabilities
  • music storage and playback appliances having wireless communication capabilities
  • Internet appliances including Internet of Things devices permitting wireless Internet access and possibly browsing, tablets with wireless communication capabilities, as well as portable units or terminals that incorporate combinations of such functions.
  • UE-1 makes HARQ-based sidelink transmission of a packet transport block to UE-2 meanwhile reserves resource for the potential next retransmission.
  • UE-2 transmits HARQ feedback channel PSFCH to UE-1 based on packet decoding results.
  • UE-1 may make retransmission over partial reserved resource and release other unused reserved resources.
  • UE-3 which is sensing the sidelink channels monitors the transmissions between UE-1 and UE-2 and may utilize the reserved resource released by UE-1/UE-2 for its own sidelink transmissions.
  • FIG. 1A shows a flow chart of one example embodiment of invention.
  • a shown in FIG. 1A there is a UE-1 110, a UE-2 90, and a UE-3 80.
  • the UE-1 determines that a packet (e.g., a transport block) is available to transmit to UE-2.
  • a packet e.g., a transport block
  • the UE-1 110 determines code block group (CBG) number (s) as per packet size or code block number/size.
  • CBG code block group
  • the UE-1 110 generates information including Sidelink Control Information (SCI) indicating enabling hybrid automatic repeat request (HARQ) feedback, CBG relevant information, and resource reservation information for retransmission.
  • SCI Sidelink Control Information
  • HARQ hybrid automatic repeat request
  • the UE-1 110 performs the sidelink transmission including sidelink control channel transmission and sidelink shared channel transmission towards the UE-2 90 with resource reservation for retransmission indicated by the sidelink control channel.
  • the UE-3 80 monitors at least the sidelink control channel.
  • the UE-3 decodes PSCCH and sidelink (SL) measurements for SL channel sensing.
  • the UE-2 decodes the sidelink control channel PSCCH and sidelink shared channel PSSCH, and at step 145 of FIG. 1A the UE-2 90 generates Sidelink Feedback Control Information (SFCI) and Physical Sidelink Feedback Channel (PSFCH) information as per the decoding result for PSSCH and the HARQ info acquired from the decoded sidelink control information.
  • SFCI Sidelink Feedback Control Information
  • PSFCH Physical Sidelink Feedback Channel
  • the UE-2 90 transmits the PSFCH including CBG-based HARQ feedback towards the UE-1 110.
  • the UE-3 80 also monitors this information.
  • the UE-3 decodes PSFCH to monitor HARQ feedback from UE-2 90.
  • the UE-1 110 generates PSCCH/PSSCH for retransmission of CBG (s) that were negatively acknowledged. Then the UE-1 110 send the retransmission over at least part of the reserved resource.
  • the UE-3 80 determines that at least part of the reserved resources are implicitly released and can be used for transmission (TX) by the UE-3 80.
  • example embodiments of the invention include:
  • Step 1 At the sidelink transmitter (say UE-1) , the following operations are performed to make a (re) transmission of the packet transport block (TB) to the target receiver UE-2.
  • UE-1 determines the code block group (CBG) number for the TB e.g. using one of the following methods:
  • the relevant threshold parameter for TB size or code block number/size could predefined or (pre) configured by the network.
  • CBGTI CBG transmission information
  • SCI sidelink control information
  • CBG number and CBGTI in SCI enables other sensing UE e.g. UE-3 to get aware of the HARQ relevant parameters and be able to understand and monitor the HARQ feedback from UE-2.
  • - UE-1 also indicates the resource reservation for the potential next retransmissions of the TB with the reserved resource size corresponding to the number of CBGs that are transmitted in this transmission (e.g. initial transmission reserves resources corresponding to all CBGs) .
  • the reserved resource for retransmission could be scheduled by gNB (in resource allocation mode-1) or selected by the UE autonomously based on sensing for sidelink channels (in resource allocation mode-2) .
  • - UE-1 configures other parameters of SCI and generates PSCCH and PSSCH and finally transmits them to the target receiver UE-2.
  • Step 2 At the sidelink receiver UE-2,
  • UE-2 transmits CBG-based HARQ feedback over the sidelink feedback channel PSFCH to UE-1.
  • this PSFCH may be also monitored by other sensing UEs e.g. UE-3 such that UE-3 could derive the information on resource releasing based on the monitored PSFCH from UE-2 and the resource reservation information from UE-1.
  • UE-3 could utilize the released reserved resource for its sidelink transmission. Note that the rules on the reserved resource releasing is illustrated in Step 3.
  • Step 3 Then, at the sidelink transmitter UE-1, there is:
  • UE-1 determines the (partial) resources over the reserved resources and makes retransmission of the TB over these resources as in Step 1; otherwise the (re) transmissions of the TB are finished.
  • the other reserved resources will be implicitly released as assumed in Step 2.
  • partial CBGs are to be retransmitted (i.e. 1 ⁇ # of CBG to be retransmitted ⁇ number of CBGs transmitted in previous transmission)
  • the retransmission occupies part of the resources reserved in the previous transmission and the other reserved resources are released.
  • the partial resource usage and releasing of other reserved resources could be implemented using at least one of the following methods:
  • Method-1 Resource release only in time domain, i.e. retransmission only occupies the resource over the first specific number of slots and the reserved resources over other slots are released. Hence, this method is only for slot aggregation sidelink transmission;
  • Method-2 Resource release only in frequency domain, i.e. retransmission only uses the first specific number of reserved subchannels and other subchannels are released;
  • Method-3 Resource release in time & frequency domain (e.g. first in time then in frequency) ;
  • Packet TB size 2017 bytes (i.e. 16136 bits) ;
  • the LDPC base graph 1 is selected for the packet.
  • the maximum code block size is 8448 as per TS38.212.
  • the number of code blocks is determined as follows
  • FIG. 1B shows a Table with associated values of a transport block size, a code block group number, and control information bits for an operation in accordance with example embodiments of the invention.
  • the CBG number is determined based on TB size as follows (as an example) .
  • FIG. 1B there is shown in accordance with example embodiments of the invention associations that can be made between a TB size in bytes (TBS) and a CBG number and Control information bits
  • the packet TB size is assumed to be 2017 bytes.
  • the CBG number is determined as 2.
  • the two code blocks are distributed to the two CBGs with each containing one code block.
  • the allocated resource (in either mode-1 or mode-2) for the initial transmission of the TB consists of 40 contiguous PRBs over 2 contiguous slots, meanwhile another resource of 40 PRBs over 2 future slots are selected for the potential retransmission (the reservation of this resource is indicated by the SCI of the initial transmission) .
  • At least the following control information fields are included in the SCI of the initial transmission.
  • CBGTI CBG transmission information
  • UE-1 After physical layer processing for the SCI and the packet TB, UE-1 generates sidelink physical channels PSCCH and PSSCH and transmits them to the target receiver UE-2 over allocated resources of 2 PRBs over 2 slots.
  • UE-2 Assuming the target receiver UE-2 decodes the PSCCH successfully and based on control information, the receiver then tries to decode the associated PSSCH with the result that the first code block is correctly decoded while the second code block decoding is incorrect. Based on this result, UE-2 transmits to UE-1 the sidelink feedback control information (SFCI) of ‘10’ (indicating ACK for the 1 st CBG while NACK for the 2 nd CBG) over the sidelink feedback channel PSFCH.
  • SFCI sidelink feedback control information
  • the PSFCH is correctly detected by UE-1 and another sensing UE, say UE-3.
  • UE-3 also decodes the PSCCH from UE-1 in the sensing procedure such that UE-3 is aware of the reserved resource by UE-1 for its potential retransmission.
  • UE-3 could derive the information that which part of the reserved resource will be used by UE-1 for retransmission and which part of the reserved resource will be released by UE-1 implicitly. Based on this, UE-3 could utilize the resources released by UE-3 for its sidelink transmission.
  • UE-1 assume it correctly detects the PSFCH from UE-2 and knows that the 2 nd CBG is not decoded by the target receiver. In this case, UE-1 will select partial resource over the resources reserved in the previous transmission and release other resources. UE-1 can shrink the reserved resources for the retransmission in frequency domain and/or time domain.
  • UE-1 can use the partial reserved resource with the first 20 PRBs over the 2 slots for the retransmission of the 2 nd CBG of the TB.
  • the other resources of 20 PRBs over the 2 slots will be implicitly released.
  • the relevant control information in the SCI is configured as follows:
  • CBGTI CBG transmission information
  • UE-1 After physical layer processing for the SCI and the packet TB, UE-1 generates sidelink physical channels PSCCH and PSSCH for the retransmission and transmits them to the target receiver UE-2 over the resources of 20 PRBs over 2 slots.
  • FIG. 2 shows transmission and retransmission operations over a partial reserved resource or with shrinking reserved resources in frequency as in accordance with an example embodiment of the invention.
  • step 205 of FIG. 2 there is a 2-slot aggregation for initial transmission for resource allocation 225 for the initial transmission.
  • Item 210 indicates that the transmission has a CBG (code block group) number equal to 2 and CBGTI (code block group transmission information) equal to 11.
  • Item 230 of FIG. 2 indicates that one subchannel of the resource allocation equals 10 PRBs.
  • step 220 of FIG. 2 there is a resource reservation for a potential retransmission.
  • step 215 of FIG. 2 there is PSFCH associated with the sidelink initial transmission indicating that the first code block group is successfully decoded while the second code block group is not. This implicitly indicates releasing of the second half of the reserved resources as shown in step 250.
  • the CBG number equals 2 and CBGTI equals 01. Included with this is a resource reservation 245 for a potential retransmission.
  • PSFCH associated with the sidelink retransmission indicating that retransmitted code block group is decoded successfully, which implicitly means releasing of the reserved resource as shown in step 255..
  • the PSCCH, the PSSCH, the PSFCH, and the released resources are indicated by different fill patterns.
  • UE-1 can use the partial reserved resource with all the 40 PRBs over the first slot of the reserved 2 slots for the retransmission of the 2 nd CBG of the TB.
  • the other resources of 40 PRBs over the 2 nd slot will be implicitly released.
  • the relevant control information in the SCI is configured as follows:
  • CBGTI CBG transmission information
  • UE-1 After physical layer processing for the SCI and the packet TB, UE-1 generates sidelink physical channels PSCCH and PSSCH for the retransmission and transmits them to the target receiver UE-2 over the resources of 40 PRBs over single slot.
  • FIG. 3 shows sidelink transmission and retransmission operations over partial reserved resource in accordance with an example embodiment of the invention, and with shrinking reserved resources in time.
  • Item 310 indicates that the transmission has a CBG (code block group) number equal to 2 and CBGTI (code block group transmission information) equal to 11.
  • Item 330 of FIG. 3 indicates that one subchannel of the resource allocation equals 10 PRBs.
  • step 320 of FIG. 3 there is a resource reservation for a potential retransmission.
  • step 315 of FIG. 3 there is PSFCH associated with the sidelink initial transmission indicating that the first code block group is successfully decoded while the second code block group is not. This implicitly indicates releasing of the second half of the reserved resources as shown in step 350.
  • the CBG number equals 2 and CBGTI equals 01. Included with this is a resource reservation 345 for a potential retransmission.
  • PSFCH associated with the sidelink retransmission indicating that retransmitted code block group is decoded successfully, which implicitly means releasing of the reserved resource as shown in step 355. Similar to FIG. 2, as shown in FIG. 3 the PSCCH, the PSSCH, the PSFCH, and the released resources are indicated by different fill patterns.
  • N CBG denotes the bitmap of the CBG-based HARQ feedback information associated with the CBGTI (i) with 1 meaning NACK for the corresponding CBG and 0 meaning ACK for the corresponding CBG.
  • the further retransmission will occupy the (partial) reserved resources with the resource sizes determined with one of at least the following three methods:
  • the resource sizes for the retransmission can be determined as follows:
  • the resource sizes for the retransmission can be determined as follows:
  • S SA denotes the set of allowable numbers of the aggregated slots.
  • S SA (1, 2, 4, 8) .
  • S SA (1, 2, 3, 4, 5, 6, 7, 8) .
  • the resources for the retransmission will potentially shrink firstly in time domain, then optionally in the frequency domain.
  • the resource sizes for the retransmission can be determined as follows:
  • the used method for the reserved resource shrinking for retransmission may be predefined in the system specification or be (pre) configured e.g. in the resource pool configuration signaling, such that the used method is well-known by not only the sidelink transmitter and receiver (s) , but also by other UEs that are sensing the sidelink channel.
  • the method-1 is used, while in the example shown in FIG. 3 as disclosed herein, the method-2 is used (note that method-3 is equivalent to the method-2 in the special case of the example) .
  • FIG. 4 shows communication operations associated with three vehicles (or UE) in accordance with example embodiments of the invention.
  • item 410 of FIG. 4 there is indicated abbreviations and features associated with example embodiments of the invention.
  • SCI Sidelink control information
  • SFCI sidelink feedback control information PSCCH: physical sidelink control channel
  • PSSCH physical sidelink shared channel
  • PSFCH physical sidelink feedback channel
  • reTX retransmission
  • CBG code block group
  • CBGTI CBG transmission information.
  • item 420 shows an overview of steps associated with communications between the UE-1 and the UE-2 of FIG. 4.
  • SCI denotes control information which is generally conveyed by physical sidelink control channel (PSCCH) .
  • PSCCH is transmitted together with the data channel PSSCH.
  • the SCI at least includes 1) CBG number; 2) CBGTI, 3) resource reservation information for reTX, and the SCI may also include information that indicates how to release the unused reserved resources in a next reTX.
  • the communications between the UE-1 and the UE-2 as in FIG. 4 include from the UE-1 towards the UE-2 there is 1) initial TX (PSCCH/PSSCH) ; then from the UE-2 towards the UE-1 there is 2) CBG-based HARQ feedback (PSFCH) ; and from the UE-1 towards the UE-2 there is 3) retransmission (PSCCH/PSSCH) . Also as shown in FIG. 4 the UE-3 is monitoring at least these PSCCH/PSFCH communications for the purpose channel sensing and resource selection for its own sidelink transmission.
  • FIG. 6A illustrates operations which may be performed by a network device such as but not limited to a network device such as the NN 110 and/or the NN 90 as in FIG. 5,
  • a network device such as the NN 110 and/or the NN 90 as in FIG. 5
  • step 610 of FIG. 6A there is performing, by a first communication device, using a resource reservation a sidelink transmission towards a second communication device for a transport block associated with the sidelink transmission.
  • step 620 of FIG. 6A there is performing in response to receiving hybrid automatic repeat request (HARQ) feedback for the sidelink transmission, at least one sidelink retransmission for code block groups of the transport block that are negatively acknowledged using partial or all of reserved resources of the resource reservation.
  • HARQ hybrid automatic repeat request
  • the sidelink transmission comprises: a sidelink control channel transmission conveying sidelink control information associated with the sidelink transmission; and a sidelink shared channel transmission conveying code blocks associated with the transport block.
  • performing the sidelink transmission comprises: determining code block segmentation of the transport block; determining a number of code block groups associated with code blocks obtained by the code block segmentation; and determining the reserved resources for the retransmission for the code block groups of transport block.
  • performing the sidelink transmission further comprises: setting code block group relevant information fields in the sidelink control information based on the determined code block segmentation and code block group number associated with the mentioned transport block; and setting resource reservation relevant information fields in the sidelink control information based on the determined reserved resources for potential retransmission associated with the mentioned transport block; generating sidelink control channel and sidelink shared channel; and transmitting the sidelink control channel and the sidelink shared channel for the sidelink transmission over the sidelink towards the second communication device.
  • the hybrid automatic repeat request feedback comprises: code block group based hybrid automatic repeat request feedback information received from the second communication device over a sidelink feedback channel from the second communication device.
  • determining the number of code block groups associated with the code blocks obtained by the code block segmentation comprises at least one of: determining the number of the code block groups based on a total number of the code blocks and code block sizes; or determining the number of the code block groups based on the transport block size.
  • code block group relevant information fields of the sidelink control information comprise: a code block group number corresponding to the determined number of the code block groups for an associated transport block; and code block group transmission information comprising a bitmap identifying a code block group number indicating a presence or absence of a corresponding code block group in current sidelink transmissions.
  • the resource reservation relevant information fields of the sidelink control information comprises at least one of: information on at least one resource reservation in a time domain which includes one or more time slots; or information on at least one resource reservation in a frequency domain which includes one or more subchannels.
  • performing the at least one sidelink retransmission for the code block groups of the transport block that are negatively acknowledged using partial or all reserved resources of the reservation comprises: performing sidelink retransmission for the negatively acknowledged code block groups using the partial or all the reserved resources in frequency domain over the partial or all the reserved resources in time domain.
  • a non-transitory computer-readable medium storing program code, the program code executed by at least one processor to perform at least methods as described in the paragraphs above.
  • an apparatus comprising: means for performing, by a first communication device, a sidelink transmission towards a second communication device using a resource reservation for a transport block associated with the sidelink transmission; means for performing (e.g., one or more transceivers 130 or one or more network interfaces (one or more transceivers 130 or N/W I/F (s) ) 80, Memory (ies) 125 or one or more memories 71, Computer Program Code 123 or Computer Program Code 73, and Processor (s) 120 or Processor (s) 75, CBG module 140-1, and/or CBG module 140-2 or CBG module 50-1, and/or CBG module 50-2 as in FIG.
  • means for performing e.g., one or more transceivers 130 or one or more network interfaces (one or more transceivers 130 or N/W I/F (s) ) 80, Memory (ies) 125 or one or more memories 71, Computer Program Code 123 or Computer Program Code 73, and Processor (s) 120 or Processor (s) 75
  • a first communication device (NN 110 or NN 90 as in FIG. 5) , using a resource reservation a sidelink transmission towards a second communication device (NN 110 or NN 90 as in FIG. 5) for a transport block associated with the sidelink transmission; and means for performing (one or more transceivers 130 or N/W I/F (s) ) 80, Memory (ies) 125 or one or more memories 71, Computer Program Code 123 or Computer Program Code 73, and Processor (s) 120 or Processor (s) 75, CBG module 140-1, and/or CBG module 140-2 or CBG module 50-1, and/or CBG module 50-2 as in FIG. 5) , by a first communication device (NN 110 or NN 90 as in FIG. 5) in response to receiving hybrid automatic repeat request (HARQ) feedback for the sidelink transmission, at least one sidelink retransmission for code block groups of the transport block that are negatively acknowledged using partial or all reserved resources of the resource reservation.
  • HARQ hybrid automatic repeat request
  • At least the means for performing and determining as disclosed above comprises a non-transitory computer readable medium [Memory (ies) 125 and/or one or more memories 71 as in FIG. 5] encoded with a computer program [Computer Program Code 123 and/or Computer Program Code 73 as in FIG. 5] executable by at least one processor [Processor (s) 120 or Processor (s) 75, CBG module 140-1, and/or CBG module 140-2 or CBG module 50-1, and/or CBG module 50-2 as in FIG. 5] .
  • FIG. 6B illustrates operations which may be performed by a network device such as but not limited to a network device such as the RAN node 170 as in FIG. 5.
  • a network device such as but not limited to a network device such as the RAN node 170 as in FIG. 5.
  • step 650 of FIG. 6B there is monitoring, by a third communication device, a sidelink control channel used for a sidelink transmission from a first communication device.
  • a sidelink feedback channel for feedback to the sidelink transmission from a second communication device.
  • step 670 of FIG. 6B there is based on monitored parameters from the sidelink control channel and the sidelink feedback channel relevant to a sidelink retransmission, performing resource selection for a sidelink transmission.
  • the parameters comprise information of a reserved resource used for the sidelink transmission and the feedback.
  • the third communication device derives from the parameters the partial or all resources to be used for sidelink retransmission and the remaining resources to be implicitly released.
  • the monitoring comprises decoding the sidelink control channel and acquiring from the sidelink control information the resource reservation information for sidelink retransmission and code block group relevant information.
  • the processing comprises: detecting the sidelink feedback channel and acquiring from the sidelink feedback control information the information of code block group based hybrid automatic repeat request feedback.
  • performing resource selection for the sidelink transmission comprises: taking into account in the resource selection for the sidelink transmission, as effectively reserved at least one of: resources reserved by the first communication device, resources monitored by the third communication device, and resources to be used by a number of negatively acknowledged code block groups indicated by the code block group based hybrid automatic repeat request feedback, and wherein any remaining reserved resources are implicitly released.
  • the resource selection is using at least one of the remaining reserved resources that are implicitly released and unreserved resources.
  • a non-transitory computer-readable medium storing program code, the program code executed by at least one processor to perform at least methods as described in the paragraphs above.
  • an apparatus comprising: means for monitoring (e.g., RRH 195, Memorie (s) 155, Computer Program Code 153, Processor (s) 152 and/or CBG Module 150-1 and/or CBG Module 150-2) , by a third communication device (e.g., NN 110 and/or NN 90) , a sidelink control channel used for a sidelink transmission from a first communication device; means for monitoring (e.g., one or more transceivers 130 or N/W I/F (s) ) 80, Memory (ies) 125 or one or more memories 71, Computer Program Code 123 or Computer Program Code 73, and Processor (s) 120 or Processor (s) 75, CBG module 140-1, and/or CBG module 140-2 or CBG module 50-1, and/or CBG module 50-2 as in FIG.
  • means for monitoring e.g., RRH 195, Memorie (s) 155, Computer Program Code 153, Processor (s) 152 and/or CBG Module 150
  • a sidelink feedback channel for feedback to the sidelink transmission from a second communication device; and means, based on monitored parameters from the sidelink control channel and the sidelink feedback channel relevant to a sidelink retransmission, for performing (e.g., one or more transceivers 130 or N/W I/F (s) ) 80, Memory (ies) 125 or one or more memories 71, Computer Program Code 123 or Computer Program Code 73, and Processor (s) 120 or Processor (s) 75, CBG module 140-1, and/or CBG module 140-2 or CBG module 50-1, and/or CBG module 50-2 as in FIG. 5) resource selection for a sidelink transmission
  • one or more transceivers 130 or N/W I/F (s) 80, Memory (ies) 125 or one or more memories 71, Computer Program Code 123 or Computer Program Code 73, and Processor (s) 120 or Processor (s) 75, CBG module 140-1, and/or CBG module 140-2 or CBG module 50-1, and/or CBG
  • At least the means for monitoring, and performing comprises a non-transitory computer readable medium [Memory (ies) 125 or one or more memories 71 as in FIG. 5] encoded with a computer program [Computer Program Code 123 or Computer Program Code 73 as in FIG. 5] executable by at least one processor [Processor (s) 120 or Processor (s) 75, CBG module 140-1, and/or CBG module 140-2 or CBG module 50-1, and/or CBG module 50-2 as in FIG. 5] .
  • the various embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto.
  • firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto.
  • While various aspects of the invention may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • Embodiments of the inventions may be practiced in various components such as integrated circuit modules.
  • the design of integrated circuits is by and large a highly automated process.
  • Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate.
  • connection means any connection or coupling, either direct or indirect, between two or more elements, and may encompass the presence of one or more intermediate elements between two elements that are “connected” or “coupled” together.
  • the coupling or connection between the elements can be physical, logical, or a combination thereof.
  • two elements may be considered to be “connected” or “coupled” together by the use of one or more wires, cables and/or printed electrical connections, as well as by the use of electromagnetic energy, such as electromagnetic energy having wavelengths in the radio frequency region, the microwave region and the optical (both visible and invisible) region, as several non-limiting and non-exhaustive examples.

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Abstract

Conformément à des modes de réalisation donnés à titre d'exemple, l'invention concerne au moins un procédé et un appareil pour effectuer, par un premier dispositif de communication, à l'aide d'une réservation de ressource, une transmission de liaison latérale vers un deuxième dispositif de communication pour un bloc de transport associé à la transmission de liaison latérale ; et pour exécuter en réponse à la réception d'un retour de requête de répétition automatique hybride (HARQ) pour la transmission de liaison latérale, au moins une retransmission de liaison latérale pour des groupes de blocs de code du bloc de transport dont l'accusé de réception est négatif à l'aide de ressources partielles ou de toutes les ressources réservées de la réservation de ressource. En outre, au moins un procédé et un appareil pour surveiller, par un troisième dispositif de communication, un canal de commande de liaison latérale utilisé pour une transmission de liaison latérale à partir d'un premier dispositif de communication ; surveiller un canal de retour de liaison latérale pour un retour à la transmission de liaison latérale à partir d'un deuxième dispositif de communication ; et, sur la base de paramètres surveillés à partir du canal de commande de liaison latérale et du canal de retour de liaison latérale pertinent pour une retransmission de liaison latérale, sélectionner la ressource pour une transmission de liaison latérale.
PCT/CN2019/103097 2019-08-28 2019-08-28 Retour de harq sur la base de cbg de liaison latérale et retransmissions associées sur des ressources réservées Ceased WO2021035580A1 (fr)

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US20240031063A1 (en) * 2022-07-20 2024-01-25 Qualcomm Incorporated Transport block size determination for sidelink slot aggregation
US12301358B2 (en) * 2022-07-20 2025-05-13 Qualcomm Incorporated Transport block size determination for sidelink slot aggregation
WO2024025627A1 (fr) * 2022-07-25 2024-02-01 Qualcomm Incorporated Conception de bloc de transport pour agrégation de minicréneaux

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