508results about "Transmission link error control system" patented technology

Provided are a method for a first device carrying out wireless communication, and a device supporting same. The method may comprise the steps of: acquiring information related to a plurality of physical sidelink feedback channel (PSFCH) occasions; acquiring information related to a slot offset between PSFCH-physical uplink control channel (PUCCH); transmitting, to a second device via a physical sidelink control channel (PSCCH), first sidelink control information (SCI) for scheduling second SCI and a physical sidelink shared channel (PSSCH); transmitting the second SCI and data to the second device via the PSSCH; generating HARQ feedback information for the plurality of PSFCH occasions; and reporting the HARQ feedback information to a base station on the basis of a PUCCH resource.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, configuration information indicating that network coding is enabled for initial transmissions associated with a multicast / broadcast service (MBS) and indicating that network coding is enabled for retransmissions associated with the MBS. The UE may receive, via a multicast traffic channel or a dedicated traffic channel, an initial transmission associated with the MBS, wherein the initial transmission is associated with a first set of encoded packets. The UE may transmit a radio link control (RLC) status feedback message associated with the initial transmission. The UE may receive, via the multicast traffic channel or the dedicated traffic channel, a retransmission associated with the initial transmission, wherein the retransmission is associated with a second set of encoded packets. Numerous other aspects are described.

An embodiment proposes a method for performing wireless communication by a first device. The method may comprise the steps of: selecting a first resource within a first selection window on the basis of first sensing; generating a first medium access control (MAC) protocol data unit (PDU) on the basis of at least one logical channel (LCH) in which hybrid automatic repeat request (HARQ) feedback is enabled; transmitting, to a second device, first sidelink control information (SCI) for scheduling a first physical sidelink shared channel (PSSCH), through a first physical sidelink control channel (PSCCH), on the basis of the first resource; and transmitting, to the second device, second SCI and the first MAC PDU, through the first PSSCH, on the basis of the first resource. For example, random selection of the first resource may not be allowed on the basis of the at least one LCH in which the HARQ feedback is enabled.

The disclosure relates to a communication technique for fusing a 5G communication system with IoT technology to support higher data rate after the 4G system and a system thereof. The disclosure may be applied to an intelligent service (e.g., smart home, smart building, smart city, smart or connected car, healthcare, digital education, retail, security and safety related services, etc.) based on 5G communication technology and IoT-related technology. The disclosure discloses a method for allowing a UE to normally receive a MBS service in various scenarios.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive, from a second UE via a sidelink interface, a triggering signal associated with triggering hybrid automatic repeat request (HARQ) feedback for a sidelink. The UE may transmit, to the second UE and based at least in part on the triggering signal, HARQ feedback associated with the second UE. Numerous other aspects are provided.

Proposed is a method for a first device to perform wireless communication according to an embodiment. The method may comprise the steps of: acquiring an SL DRX configuration including information related to a sidelink discontinuous reception (SL DRX) cycle and information related to an active time; transmitting first sidelink control information (SCI) to a second device through a first physical sidelink control channel (PSCCH), wherein the first sidelink control information (SCI) is for scheduling a first physical sidelink control channel (PSSCH); transmitting second SCI and a first medium access control (MAC) protocol data unit (PDU) to the second device through the first PSSCH; determining a first physical sidelink feedback channel (PSFCH) resource in the first PSFCH slot on the basis of an index of a slot related to the first PSSCH and an index of a subchannel; and receiving a first hybrid automatic repeat request (HARQ) feedback for the first MAC PDU, the first HARQ feedback being received from the second device on the basis of the first PSFCH resource. For example, the first PSFCH slot may be included in an inactive time at the time of transmission of the first MAC PDU. For example, the first PSFCH slot may be included in an active time at the time of reception of the first HARQ feedback.

A first station (STA) receives a first portion of a first physical layer protocol data unit (PPDU) via a first link from a second STA. Based on the first portion of the first PPDU indicating low latency relaying and comprising an address of the first STA as a first receiver address of the first PPDU, the first STA decodes and forwards a second portion of the first PPDU for transmission in a second PPDU via a second link to a third STA.

Methods, systems, and devices for wireless communications are described. Techniques described herein provide for priority and feedback resources for rate-split transmissions. In rate-splitting approaches, messages destined for various user equipment (UEs) may be split into a common portion and a private portion. The common portion of messages may be transmitted to multiple UEs, and each of the private portions may be transmitted to individual UEs, so that each UE may receive their entire respective messages. The network may assign different feedback resources for the common portion and the private portion of a rate-split transmission. The feedback resource for the common portion may be prior to the feedback resource for the private portion.

Methods and apparatus are provided for wireless communication performed by a network-controlled repeater (NCR) configured to forward downlink (DL) channels or signals from a base station to a user equipment (UE). The NCR determines a duration for which hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback is configured. The NCR determines a number of measurements of the DL channels or signals for which a single HARQ-ACK bit is reported. The NCR determines, based on the number of measurements and a comparison with a success threshold for each of the measurements, an acknowledgement (ACK) or negative acknowledgement (NACK) for each configured HARQ-ACK bit in a first sequence of HARQ-ACK bits. The NCR constructs a dynamic HARQ-ACK codebook to send to the base station. The dynamic HARQ-ACK codebook includes at least the first sequence of HARQ-ACK bits.

A data transmission (including receiving and sending) method is disclosed. According to the data transmission method, a terminal device receives downlink control information (DCI), where cyclic redundancy check (CRC) of the DCI is scrambled by using a first RNTI, the DCI is used to schedule a first downlink data channel, and the first downlink data channel is scrambled by using a second RNTI; and the terminal device receives the first downlink data channel based on the DCI. The DCI includes a DAI domain and / or an FDRA domain. The DAI domain indicates a count of first HARQ-ACK information in a first HARQ-ACK codebook, and the first HARQ-ACK codebook corresponds to the first RNTI. The FDRA domain indicates, within a frequency domain range of a public frequency resource, a scheduled frequency domain resource on the first downlink data channel.

Embodiments of the present disclosure relate to hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback transmission. According to some embodiments of the disclosure, a method may include: receiving, from a base station (BS), configuration information for a sub-group of UEs, wherein the sub-group of UEs comprises the UE; receiving, from the BS, a downlink control information (DCI) format for scheduling a physical downlink shared channel (PDSCH), wherein the PDSCH is received by a plurality of UEs which are divided into a plurality of sub-groups of UEs comprising the sub-group of UEs; determining a time domain resource for transmitting HARQ-ACK feedback for the PDSCH; and transmitting, to the BS, the HARQ-ACK feedback for the PDSCH on the time domain resource.

Disclosed are a method and apparatus for sidelink channel access in an unlicensed band. The method for a first terminal comprises the steps of: on the basis of a groupcast method, transmitting data to a plurality of terminals; receiving, from one or more terminals from among the plurality of terminals, one or more pieces of HARQ-ACK feedback on the data; adjusting the CW size on the basis of the result of comparison between an ACK ratio to the one or more pieces of HARQ-ACK feedback and a threshold value; and performing SL communication on the basis of a CW having the adjusted CW size.

This application provides a communication method and a communication apparatus. The communication method includes: A first network device sends a first downlink signal at first time. The first time is also time at which a second network device sends a second downlink signal, the first downlink signal includes first information, the second downlink signal includes second information, and a length of the first information is the same as a length of the second information. A first terminal device receives the first downlink signal, and sends a first uplink signal to the first network device at second time based on the first downlink signal. Correspondingly, the first network device receives the first uplink signal at the second time. The second time is also time at which the second network device receives a second uplink signal from a second terminal device, the first uplink signal includes third information, the second uplink signal includes fourth information, and a length of the third information is the same as a length of the fourth information. The communication method provided in this application can improve a coverage capability, and help improve communication efficiency.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate than a 4G communication system such as LTE. According to various embodiments of the disclosure, a method performed by a transmitting apparatus in a wireless communication system can be provided. The method can include the steps of transmitting first control information via a physical downlink control channel (PDCCH), the first control information being used for scheduling a group common-physical downlink shared channel (GC-PDSCH) via which data is multicast, the first control information including information related to a hybrid automatic repeat request (HARQ) feedback for the multicast data, and transmitting second control information via the PDCCH, the second control information being used for scheduling a physical downlink shared channel (PDSCH) via which data is unicast, the second control information including information related to a HARQ feedback for the unicast data.

This application provides a data transmission method and an apparatus, and relates to the field of communication technologies. According to the method, a first network device sends a first message including first information to a remote terminal device. The first message indicates the remote terminal device to switch from being connected to the first network device through a first path to being connected to a second network device through a second path. The first path includes at least one relay terminal device. The second path includes at least one relay terminal device or does not include a relay terminal device. The first information indicates a receiving status of a first PDCP entity of the first network device. The first information is carried in a switch command, so that the remote terminal device can receive the first information as soon as possible, to avoid or reduce packet loss when data is transmitted on the second path based on the first information.

A method of wirelessly communicating includes generating, at a wireless device, a packet including a first preamble field. The method further includes generating a first repeated preamble field by multiplying the first preamble field by a first frequency-domain polarity sequence. The method further includes transmitting the packet from the wireless device. The packet includes the first preamble field and the first repeated preamble field.

In a wireless communications system comprising a user device and a base station, the base station periodically broadcasts system information which is used by the user device in a random access procedure to connect to the base station. The base station grants uplink resource to the user device for sending a connection request message. In response to the connection request message, the base station transmits a contention resolution message, which the user device must acknowledge. The system information periodically broadcast by the base station comprises an acknowledgement control marker defining whether the acknowledgement is to be sent on a reserved uplink control channel using second uplink resource or via first uplink resource allocated to the user device in the uplink grant for the connection request message.

An apparatus for transmitting HARQ-ACK (Hybrid Automatic Repeat Request-Acknowledge) signal includes a memory and processor circuitry. The memory stores a plurality of instructions. The processor circuitry is coupled to the memory and is configured to determine a sidelink HARQ-ACK signal. The sidelink HARQ-ACK signal is carried in a first part of symbols of a time interval. The processor circuitry is further configured to transmit the sidelink HARQ-ACK signal to a second device. The time interval further comprises a third part of symbols. The third part of symbols is located in front of the first part of symbols carrying the sidelink HARQ-ACK signal, or one or more symbols in front of the first part of symbols are taken as the third part of symbols.

The present disclosure relates to a method of performing operations for a User Equipment (UE) in a wireless communication system. In particular, the method includes the steps of: receiving a Physical Downlink Control Channel (PDCCH) addressed to a Cell-Radio Network Temporary Identifier (C-RNTI) for a Hybrid Automatic Repeat and request (HARQ) process; receiving a Physical Downlink Shard Channel (PDSCH) including a Medium Access Control (MAC) Protocol Data Unit (PDU) based on the PDCCH, wherein the MAC PDU includes a discontinuous reception (DRX) command MAC control element (CE); and based on the MAC PDU further including multicast data, performing a multicast DRX operations based on the DRX command MAC CE.

The embodiment of the disclosure discloses a multicast communication method and device, which can be applied to a vehicle-to-everything (V2X) system, a vehicle-to-vehicle (V2V) system, etc. The method comprises the following steps: a first terminal device determines a hybrid automatic repeat request (HARQ) feedback mode selected by the first terminal device; and the first terminal device determines whether to retransmit multicast data according to the HARQ feedback mode selected by the first terminal device. Through the embodiment of the disclosure, multicast communication in a Sindlink-U scenario can be realized, multicast data integrity in the Sindlink-U scenario is ensured, and the problem of packet loss of terminal devices in a group is solved.

An electronic device according to an embodiment may comprise: one or more wireless communication modules configured to transmit and receive a wireless signal; one or more processors operatively connected to the wireless communication modules; and a memory for storing instructions. The instructions may be individually executed by the processor to cause the electronic device to: receive a first reception response frame on a first link with respect to a first set of data frames transmitted on the first link; receive a second reception response frame on a second link with respect to a second set of data frames transmitted on the second link; determine, on the basis of information included in the first reception response frame and information included in the second reception response frame, whether a first data frame failed to be transmitted or omitted from the first set and a second data frame failed to be transmitted or omitted from the second set overlap each other; and adaptively aggregate the first data frame and the second data frame into a third set of data frames on the basis of whether the first data frame and the second data frame overlap each other.

A method and an apparatus for supporting MBS in a wireless communication system are provided. A method performed by a user equipment (UE) in a wireless communication system includes: receiving configuration information for a multicast broadcast service (MBS) via a radio resource control (RRC) release message; entering an RRC inactive state based on the received RRC release message; and receiving the MBS in an RRC inactive state based on the configuration information for the MBS, where the MBS is received via a multicast bearer for the MBS, and where the MBS is received via a multicast bearer for the MBS. At least one of a Packet Data Convergence Protocol (PDCP) entity, a Radio Link Control (RLC) entity, a Medium Access Control (MAC) entity, a Physical Layer entity and a Service Data Adaptation Protocol (SDAP) entity is configured for a multicast bearer of the MBS.

Provided are a method for performing wireless communication by a first device and a device supporting the method. The method may comprise the steps of: receiving, from a second device, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH), via a physical sidelink control channel (PSCCH); receiving, from the second device, information related to a channel occupancy time (COT), via the PSSCH; and performing, within the COT, a sidelink (SL) channel access procedure, on the basis of a time gap between an SL channel related to the COT and a channel to be transmitted by the first device.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may communicate on a physical control channel in a control bandwidth part (BWP) based at least in part on a mapping of the physical control channel to the control BWP, and communicate on a physical shared channel in a data BWP based at least in part on a mapping of the physical shared channel to the data BWP. Numerous other aspects are provided.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive radio resource control (RRC) signaling indicating a duration for a timer to be used during a random access channel (RACH) procedure in which the UE transmits mobile-originated uplink data. While in an inactive mode, the UE may transmit the mobile-originated uplink data in a first message of the RACH procedure and the UE may start the timer based at least in part on transmitting the uplink data. The UE may monitor, while in the inactive mode and for the duration of the timer indicated in the RRC signaling, to detect a second message of the RACH procedure including mobile-terminated downlink data in response to the mobile-originated uplink data. Numerous other aspects are provided.

A communication control device for a subscriber station for a serial bus system and a method for communicating in a serial bus system are provided. The communication control device is designed to control communication of the subscriber station with at least one other subscriber station of the bus system and to generate a transmission signal for transmission onto a bus of the bus system and / or to receive a signal from the bus, wherein the communication control device is designed to generate the transmission signal in accordance with a frame in which a bit having a predetermined time length is provided, wherein the communication control device is designed to generate the transmission signal such that the bit of the transmission signal can be transmitted onto the bus as an explicit state or an implicit state, whereby the implicit state can be overwritten by the explicit state.