260 results about "Multicast transmission" patented technology

The present disclosure provides a method and device for multicast transmission, wherein a method for multicast transmission performed by a first network device includes: receiving a first message for requesting handover from a second network device; transmitting a second message for responding to the first message to the second network device.

The invention discloses an unmanned cluster hierarchical networking system and a multi-source tree routing protocol implementation method, the method adopts a hierarchical networking form to construct a tree topology, and comprises the steps of constructing the tree topology by taking at least one cluster head node as a root node, forming a transmission path of a far-end node, the cluster head node and a manned node, and establishing a multi-source tree routing; selecting an optimal father node as a relay node of an uplink path by adopting a shortest path first and link quality assisted routing measurement strategy; an uplink routing table is established through periodically broadcasting source tree information, and a downlink routing table is established through tree-shaped routing information feedback maintenance; and establishing and maintaining the multi-source tree topology by using an uplink routing table, a downlink routing table and a point-to-point routing table according to the requirements of uplink multi-source data convergence, downlink multicast transmission and end-to-end unicast transmission. According to the method, flexible networking, rapid reconstruction and dynamic resource allocation can be met, and the method has the advantages of low routing storage overhead and low calculation overhead.

Methods and systems are disclosed for enhancements to multicast beamforming to support PTM multicast service, concurrent multicast and unicast service, MBS, or group side-link service at the physical layer. A base station or multicast UEs of a wireless communication network may enhance reporting of the channel state information of a link between the base station and the UE and adaptation of the link for multicast beamforming. Enhancements to multicast beamforming may include techniques such as CQI table optimization and SSB-based early CQI reporting, consideration of UE preferences such as the preferred number of retransmissions and frequency-hopping preference for retransmission when designing a time-domain or frequency-domain retransmission scheme common to the multicast UEs, and multi-layer MIMO beamforming for 2-layer multicast transmissions over the horizontal and vertical polarizations and for concurrent multicast and unicast transmissions. The enhancements improve multicast service performance and efficiently allow a UE to gain access to multicast service.

Embodiments of the present disclosure relate to multicast transmissions and receptions. According to some embodiments of the disclosure, a UE may: receive, from a base station (BS) in a first search space, a first downlink control information (DCI) for scheduling a first physical downlink shared channel (PDSCH) using a hybrid automatic repeat request (HARQ) process number, wherein a cyclic redundancy check (CRC) of the first DCI is scrambled by a first radio network temporary identifier (RNTI) specific to the UE and the first search space is configured specifically for multicast services; and determine that the first PDSCH carries a transport block (TB) associated with a multicast service.

Embodiments include methods, performed by a user equipment (UE), for hybrid ARQ (HARQ) feedback in relation to multicast transmissions from a network node in a radio access network (RAN). Such methods include receiving, from the network node, first downlink control information (DCI) scheduling a first multicast transmission associated with the UE and determining a HARQ feedback mode for the first multicast transmission. Such methods also include, based on the first DCI, attempting to decode the first multicast transmission; and selectively transmitting HARQ feedback related to the first multicast transmission to the network node based on the determined HARQ feedback mode and on whether the attempt to decode is successful or unsuccessful. Embodiments also include complementary methods for a network node, as well as UEs and network nodes configured to perform such methods.

A wireless device receives configuration parameters, of a multicast and broadcast service (MBS) session, that indicates a channel state information (CSI) report configuration and a group common identifier. Based on the group common identifier, a downlink control information (DCI) is received that includes a resource indication of a group common physical downlink shared channel (PDSCH) for a multicast transmission of a transport block (TB), and a parameter indicating whether a CSI report is enabled for the MBS session. The TB is received via the group common PDSCH. In response to the parameter indicating that the CSI report is enabled, the CSI report is transmitted based on the CSI report configuration.

The present disclosure provides systems, apparatus, methods, and computer-readable media for supporting radio resource control (RRC) state selection for multicast service reception. A user equipment (UE) may subscribe to multicast services when in an RRC connected state, and may thereafter transition to an RRC inactive state. The network entity may then send an indication of whether the UE will remain in the RRC inactive state to receive a multicast transmission associated with the multicast service or whether the UE will transition to the RRC connected state to receive the multicast transmission. In some aspects, the indication may cause some UEs to remain in an RRC inactive state to receive a multicast transmission (which may reduce power consumption), while other UEs may transition to an RRC connected state to receive the same multicast transmission (which may improve communication reliability). Other aspects and features are also claimed and described.

This disclosure describes an architecture for supporting MBS sessions in a wireless access network. Each of such MBS sessions is flexibly and dynamically delivered by the access network into one or more Point-To-Point (PTP, or unicast) and Point-To-Multipoint (PTM, or multicast) delivery instances. As such, a subset of the UEs participating in the MBS may be configured to receive the MBS session in a PTP-like manner and quality. The architecture further allows for access network level switching of one or more of the UEs participating in the MBS session between the PTP mode and PTM mode. Such switching are effectuated dynamically without involvement of application layer. The resource allocations and configuration for the PTP and PTM delivery instances may be performed in the access network collaboratively between a central unit (CU) and one or more distributed units (DUs). Such collaborative resource allocation and configuration may be effectuated using a novel architecture for the signaling messages between the CU and the DUs.

Described are methods of managing content delivery in a network with a population of proxies, each proxy having one or more connected clients. The methods determine which content segments to transmit on a multicast channel by taking into consideration the requests for content segments by the clients. More particularly, information relating to requests for segments by one or more clients received from one or more proxies is used to maintain a count of the number of requests made for each given segment. Then a given segment is triggered for transmission over multicast when the count of the number of requests for that given segment reaches or exceeds a predetermined threshold.

The embodiment of the invention discloses a transmission method and device and a storage medium, and belongs to the technical field of communication. According to the method, when the multicast transmission condition is met, the service data is sent in a multicast transmission mode, retransmission is processed in a unicast transmission mode, packet loss can be effectively reduced through retransmission, the data transmission reliability is improved, and the transmission quality is ensured. And when the multicast transmission condition is not met, the service data is sent in a unicast transmission mode and retransmission is processed, so that packet loss can be effectively reduced, the data transmission reliability is improved, and the transmission quality is ensured. Besides, according to the scheme, each receiving end is controlled to be dynamically switched between the reliable multicast mode and the unicast mode by judging the multicast transmission condition, and the aim of reducing resource waste can be achieved by utilizing the respective advantages of the reliable multicast mode and the unicast mode through reasonable setting of the multicast transmission condition.

The invention provides a multi-view video processing method and a related device. According to the method, feature recognition is carried out on audios collected from multiple visual angles, after the audios are aligned, display timestamp information is printed on each path of video, multiple video codes with different definitions are carried out, and transmission is carried out through a multicast protocol in the mode of the same or different IPs and different ports. And the live broadcast terminal obtains the corresponding live broadcast video stream according to the own playing capability, so that multi-view video decoding and synchronous playing are realized. The audio and picture synchronization problem of the multi-view video is solved through an audio synchronization technology based on feature recognition, multicast transmission, terminal capability matching and the like, and the requirements of various types of terminals with different capabilities for playing the multi-view video are met. The method is suitable for realizing multi-view video live broadcast through a multicast protocol, and provides a solution for a multicast service scene in the field of articulated naturality web.

The invention provides an industrial Internet of Things bidirectional information transmission and full loop control collaborative optimization method, which belongs to the technical field of wireless communication, and comprises the following steps: constructing a bidirectional information transmission architecture based on a sensor, a controller and an actuator, and introducing a multicast transmission mode into a controller-actuator downlink, the utilization efficiency of downlink transmission resources is improved; performing joint optimization on time-frequency resources of uplink transmission and downlink multicast packet transmission, and constructing a problem of total cost minimization of the industrial Internet of Things system; and solving the total cost minimization problem of the industrial Internet of Things system based on a transmission scheduling joint optimization algorithm to obtain a time-frequency resource allocation scheme and the minimum total cost of the industrial Internet of Things system. According to the invention, the resource allocation can be adaptively adjusted according to the channel condition of the industrial environment and the scale of the sensor network, and the overhead of the control system is effectively reduced.

The present application relates to devices and components including apparatus, systems, and methods to provide multicast transmissions during an inactive state of a user equipment.

Provided are a resource allocation method, a device, and a storage medium. The resource allocation method applied by a first communication node includes receiving at least two resource requests forwarded by a second communication node and carrying to-be-transmitted service data; classifying the to-be-transmitted service data carried by each resource request to obtain unicast transmission data and multicast transmission data; and allocating a unicast transmission resource and a multicast transmission resource to the unicast transmission data and the multicast transmission data respectively.

Multicast and broadcast services (MBS) content data in non-terrestrial networks may be received as a function of whether device location fulfills access conditions and / or the validity of a service area. A device may receive radio network identifiers (RNTIs) with a validity period to decode MBS session data. The RNTIs provided may be a function of cell movement, device location, and / or MBS session area. A device may be configured to receive a list of MBS session IDs. The device may obtain the device's location information. The device may identify one or more valid MBS service areas. The device may transmit information for a network to verify satisfaction of one or more access conditions. The device may receive one or more radio network temporary identifiers (RNTIs) that may be associated with periods of validity. The device may use the RNTIs to decode the MBS data.

Methods and techniques are provided that employ multicast transmission and anycast transmission to coordinate and distribute tasks and / or processing requests amongst groups of resources on a network. In one embodiment, the groups of resources can include nodes or other resources of a blockchain network that implement all or part of a particular blockchain protocol (e.g., Bitcoin SV protocol), and / or service providers that provide services to a blockchain-related organisation, group or network.

Embodiments herein relate to a method performed by a network node in a telecommunication network providing a multicast transmission to a group of devices residing in a cell of the telecommunication network. The network node monitors a congestion level for communication, and, if the congestion level reaches a first threshold, the network node orders for at least one device in a RRC connected mode to be released from the RRC connected mode to an RRC idle mode or an RRC inactive mode, thereby disabling a capability of the at least one device to provide one or more re-transmission requests while keeping an ability of the at least one device to further receive the multicast transmission.

More efficient data transmission of safety-relevant data is achieved by a method for transmitting data between the central control apparatus and a plurality of decentralized devices, which includes generating, in the central control apparatus, a data telegram for the broadcast or multicast transmission of data to a plurality of devices, unidirectionally transmitting the data telegram from the central control apparatus to at least one decentralized device, monitoring the transmission duration of the transmission of the data telegram from the central control apparatus to the at least one decentralized device, and triggering a predetermined safety reaction if the transmission duration exceeds a predefined value. Further, a control and data transmission system designed to carry out the method, and means belonging to such a system.

The invention relates to a DDS and TSN automatic integration configuration architecture and method, the architecture comprises an application layer, a control layer and a data layer, the application layer comprises a DDS publisher and a DDS subscriber, the control layer comprises a DS server and a TSN controller, and the data layer comprises a TSN switch deployed in an end system and a network by the DDS application; the TSN controller establishes a connection with the DDS server, so that the DDS server sends the collected information to the TSN controller through the connection to request the reserved time slot of the network resource; the TSN controller outputs an L2 forwarding table, a gating list and a publishing moment which meet multicast transmission through a routing scheduling algorithm; and the L2 forwarding table and the gating list are issued to the TSN switch for configuration, the issuing moment is replied to the DDS server as the response of the request, and the DDS server dynamically configures the moment when the issuer starts to send data. Compared with the prior art, the real-time transmission of the DDS key task flow is ensured while the integration complexity of the DDS key task flow and the DDS key task flow is effectively reduced.

The present application relates to devices and components including apparatus, systems, and methods to provide processing of multicast data via user equipment while the user equipment is in an inactive state in wireless communication systems.

The present application relates to a method for energy-efficient unicast and multicast transmission in a wireless communication system. A method for time-division multiplexing subframes on a serving cell to a user equipment (UE) wherein an eNodeB indicates the communication via a bitmap, wherein the bitmap indicates a set of subframes (501, 502, 503) operating with a legacy Long Term Evolution (LTE) transmission format using a first bit (bit "0") and another set of subframes (504) operating with an Evolved Transmission New Carrier Type (NCT) format using a second bit (bit "1"), including reduced density cell-specific reference signal (CRS) transmission without a physical downlink control channel (PDCCH) control region.

Methods, systems, and apparatus for multicast wireless communications are described. A base station may configure a user equipment (UE) to provide feedback for a multicast transmission from the base station when the UE is in an inactive or idle mode. Based on a configuration sent from the base station to the UE, the UE may determine a resource or timing advance (TA) to be used to transmit a feedback message for the multicast communication. The base station may configure the UE with a plurality of TA commands, each TA command corresponding to a TA value and a set of channel metrics associated with a group of cells including a serving cell of the UE. Based on the channel metrics measured at the UE, the UE may determine a TA to be used for multicast feedback. The TA value may be determined using neural network modeling.

A wireless device receives parameters indicating the following: a first discontinuous reception (DRX) configuration associated with a unicast transmission, and a second DRX configuration associated with a multicast transmission. The wireless device receives a power saving (PS) indication of a PS operation indicating a DRX on duration. In response to the PS indication indicating the PS operation, the wireless device skips monitoring a first physical downlink control channel (PDCCH) associated with the unicast transmission during a first DRX on duration of the first DRX configuration. Regardless of the PS indication, the wireless device monitors a second PDCCH associated with the multicast transmission during a second DRX on duration of the second DRX configuration.

Aspects described herein relate to retransmission implementations in new radio (NR) wireless communication systems. In one aspect, a network entity may initially perform a multicast transmission and then a multicast retransmission according to a hybrid automatic repeat request (HARQ) process. In another aspect, a user equipment (UE) may initially receive a multicast transmission from a network entity and a subsequent multicast transmission according to a HARQ process. In an additional aspect, a network entity may initially perform a multicast transmission and then a subsequent unicast retransmission according to a HARQ process. In yet another aspect, a UE may initially receive a multicast transmission from a network entity and a subsequent unicast transmission according to a HARQ process.

Methods, systems, and apparatus for user equipment (UE) device-to-device sidelink wireless communications utilizing transmit power adjustments provided via transmit power control requests. A group of UEs may communicate using a sidelink multicast transmission, and a sidelink multicast transmitter may increase or decrease the transmit power of the multicast transmission to achieve more efficient and reliable transmission. Each UE receiving a multicast transmission from a sidelink multicast transmitter may have a different set of radio resources that may be used to transmit transmit power control indications to request higher or lower transmit power at the transmitting UE. Alternatively, radio resources for providing transmit power indications may be provided separately for TPC-UP indications and for TPC-DOWN indications.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive first control information indicative of a resource allocation for reception of periodic multi-slot multi-cast transmissions. In some aspects, the control information may indicate a semi-persistent scheduling (SPS) configuration for multi-cast, multi-slot signaling. The resource allocation may include a set of multiple reception occasions over a set of multiple slots. The UE may receive one or more transport blocks during the set of multiple reception occasions over the set of multiple slots. In some aspects, the UE may transmit feedback information for the one or more transport blocks.

An embodiment of the present disclosure provides a device control method, which includes: obtaining a scene control instruction for multiple devices, wherein the scene control instruction is configured to instruct the multiple devices to execute corresponding scene actions respectively; identifying first devices in the multiple devices, wherein the first device is a device that has been configured with scene action record; if at least one first device is identified, sending the scene control instruction to the first devices in a multicast transmission mode to instruct the first devices to respond to the scene control instruction and synchronously execute a scene action recorded for the first devices in the scene action record.

Methods and techniques are provided that employ multicast transmission and anycast transmission to coordinate and distribute tasks and / or processing requests amongst groups of resources on a network. In one embodiment, the groups of resources can include nodes or other resources of a blockchain network that implement all or part of a particular blockchain protocol (e.g., Bitcoin SV protocol), and / or service providers that provide services to a blockchain-related organisation, group or network.

The present application relates to the technical field of communications, and specifically relates to a network transmission method, a readable storage medium and an intelligent device, which aim to solve the technical problem of how to achieve lower traffic, lower CPU overheads and lower latency on the premise of ensuring the reliability of a network transmission process. To this end, in the present application, a sending end is in communication connection with a receiving end by means of a UDP multicast transmission channel and a TCP transmission channel, wherein the UDP multicast transmission channel is a one-to-many one-way communication channel based on a UDP transmission protocol, and the TCP transmission channel is a one-to-one two-way communication channel based on a TCP transmission protocol. The UDP multicast transmission channel is used for transmitting sent transmission data to at least one receiving end, the TCP transmission channel is used for feeding back a frame loss acknowledgment response to the sending end when the receiving end detects a frame loss of the transmission data, and the sending end re-transmits transmission data corresponding to the frame loss answer response. The advantages of TCP transmission and UDP multicast transmission are effectively combined, thereby ensuring the reliability of a transmission process, and saving on traffic and CPU overheads.

Embodiments of apparatuses, systems, and methods for enabling flexible acknowledgments for a user equipment (UE) and a network are presented. The UE may determine whether to request feedback (e.g., HARQ ACK / NACK) for one or more multicast transmissions. The determination may be based on factors such as the remaining time to perform the transmission and the amount of time required to perform the transmission given the time available or not available to receive and process feedback.