266 results about "Multicast communication" patented technology

A disclosure of the present specification provides a method for performing multicast-related communication by an SMF. The method may comprise the steps of: receiving, from a UE, a join request message for requesting participation in multicast communication; transmitting, to an AMF node, an allocation request message for requesting allocation of an EBI to a unicast QoS flow corresponding to a multicast QoS flow related to the multicast communication; and receiving information of the EBI allocated to the unicast QoS flow from the AMF node.

Techniques and apparatuses are described for machine-learning architectures for broadcast and multicast communications. A network entity processes broadcast or multicast communications using a deep neural network (DNN) to direct the one or more broadcast or multicast communications to a targeted group of user equipments (UEs) using the wireless communication system. The network entity receives feedback from at least one user equipment (UE) of the targeted group of UEs. The network entity determines a modification to the DNN based on the feedback. The network entity transmits an indication of the modification to the targeted group of UEs. The network entity updates the DNN with the modification to form a modified DNN. The network entity processes the broadcast or multicast communications using the modified DNN to direct the broadcast or multicast communications to the targeted group of UEs using the wireless communication system.

There is provided a method of operating a communication device of a communications network. The method comprises receiving (300) a first signal from a network node of the communications network, determining (302) a communication parameter from the first signal, and receiving (304) multicast radio bearer (MRB) communications from the network node using the communication parameter.

Embodiments of this application provide a multicast communication method and related apparatus. The multicast communication method is implemented by a user equipment and includes receiving UE route selection policy (URSP) information transmitted by a policy control function entity, the URSP information including a URSP rule supporting a multicast service; querying the URSP rule supporting the multicast service according to a multicast network address corresponding to a multicast service context that needs to be activated, to obtain network slice information and data network name information; and activating Multicast and Broadcast Service (MBS) context information of the user equipment based on the network slice information and the data network name information, adding the user equipment to a multicast group corresponding to the multicast network address for multicast communication.

The invention relates to the technical field of cooperative control, in particular to a multi-compartment NVR (Network Video Recorder) state reporting and cooperative control system based on multicast communication, which comprises a state sensing aggregation module, a communication load evaluation module, a cache scheduling release module, a synchronous boundary correction module and a cooperative control configuration module. According to the invention, the node group in the frequently activated state can be identified through the normalization quantization processing of the starting frequency of the video channel in the carriage, the reading of the temperature sensor and the writing rate of the hard disk, and the load evaluation is carried out by combining the message data volume and the channel transmission capability of the node in the historical multicast period. A conflict early warning mark can be formed before a state conflict occurs, correction of time migration among multiple nodes is completed based on comparison of a node receiving timestamp difference value and a clock synchronization tolerance, a control instruction set for time alignment is constructed based on a unified time correction result, a trigger control task is broadcast and executed in a time window packaging mode, and the time correction efficiency is improved. And the communication resource use efficiency is improved.

The invention discloses a door lock collaborative identity recognition method and system, and the method comprises the steps: obtaining a locally stored MAC-face binding relation table according to face recognition verification completed by a resident through an intelligent door lock; according to the moving path of the resident from the floor entrance to the home door lock, identity recognition is completed through cooperation of multicast communication and the home door lock, an identity confirmation result is obtained, and a directional multicast network is constructed; according to a leaving event that a resident opens a door lock from a room, triggering a passing door lock to collect leaving person information, and obtaining a leaving person identity confirmation result; and selecting to send a unicast or multicast confirmation message by the own door lock according to the completion degree of identity confirmation of the leaving person, and triggering the passing door lock to send an IGMP leaving message to the router to obtain a simplified multicast forwarding table. According to the embodiment of the invention, seamless identity cooperation of the whole process from home returning to home leaving can be realized, and the automation degree of home security and protection and the user experience are improved.

The invention discloses a Modbus protocol security enhancement method in a multicast communication scene, which comprises the following steps: when a master node initiates an identity authentication request, the master node calculates a first message authentication code of a first random number according to a session key; wherein the session key is obtained according to random numbers pre-generated by the master node and the slave node; broadcasting and sending the encrypted session key and the first message authentication code to each slave node; the slave node decrypts the encrypted session key, and calculates a second message authentication code of the first random number according to the obtained session key; when the message authentication codes are the same, authenticating the identity of the main node; the slave node calculates a third message authentication code of the second random number by using the session key, and sends the third message authentication code to the master node; the main node uses the session key to calculate and obtain a fourth message authentication code of each second random number; and when the message authentication codes are the same, authenticating the identity of the corresponding slave node. According to the invention, the identity verification efficiency is improved, and the safety and reliability are improved.

The invention relates to the technical field of computer data processing, in particular to a self-discovery communication method, system and device between network participant containers based on DDS communication middleware and a readable storage medium, network participant application programs are independently packaged in the containers based on the DDS communication middleware, and a virtual large two-layer network is created by using a Wave Net, so that the network participant application programs are automatically found in the containers. The virtual large two-layer network adopts a VXLAN tunnel to construct a network bottom layer, so that containers deployed on different hosts communicate in the same virtual local area network; the publisher container and the subscriber container show existence of themselves through multicast communication broadcast discovery information, and the publisher container and the subscriber container obtain IP and port information of the opposite side and carry out point-to-point unicast communication when themes are matched. According to the invention, while network isolation is ensured, the physical network boundary of the DDS container is greatly expanded, the network interconnection capability of the container in the system is improved, a high-availability and high-performance containerized distributed real-time system can be constructed, and multi-host and multi-node communication application requirements can be met.

A radio access network (RAN) participating in a multicast and broadcast service (MBS) session may implement a method for managing MBS communications. The method comprises: (a) performing (i) unicast communication and (ii) multicast communication with a UE operating in a connected state; (b) in response to determining that the data of the unicast communication is inactive, transmitting a message indicating that the UE will transition from the connected state to an inactive state in which the radio connection between the UE and the RAN is suspended; and (c) continuing to perform multicast communication with the UE operating in the inactive state.

A method, implemented in a User Equipment (UE), for receiving Multicast and / or Broadcast services (MBS) data includes performing a Protocol Data Unit (PDU) session establishment procedure with a Core Network (CN) to establish a PDU session to join an MBS session, including receiving, from a Radio Access Network (RAN), at least one first configuration for configuring radio resources for the PDU session; performing an MBS session join procedure with the CN to join the MBS session, including receiving, from the CN, an MBS session identifier and receiving, from the RAN, at least one second configuration for configuring radio resources for the MBS session; receiving, from the CN via the RAN, first MBS data of the MBS session in accordance with the at least one first configuration; and receiving, from the CN via the RAN, second MBS data of the MBS session in accordance with the at least one second configuration.

A radio access network (RAN) participating in a multicast and broadcast services (MBS) session can implement a method for managing MBS communication. The method includes: (a) transmitting, to a user equipment (UE), a first command to transition from a connected state to an inactive state in which a radio connection between the UE and the RAN is suspended, the command including a first multicast configuration with an MBS radio bearer (MRB) parameter, for receiving MBS data; (b) transmitting, to the UE operating in the inactive state, MBS data according to the first multicast configuration; (c) receiving, from the UE, a request to resume the radio connection; and (d) transmitting, to the UE and in response to the request, a second command to resume the radio connection, the command including a second multicast configuration for continuing to receive the MBS data in the connected state.

The invention relates to a rapid clock synchronization system and method based on a virtualization technology. The system comprises a secure clock virtual machine STVM, a working virtual machine VM, a clock card and a TSN switch. The STVM is directly connected with a clock card through a virtualization technology to generate a unique clock; the TSN switch establishes a multicast communication network of a secure clock virtual machine STVM and each working virtual machine VM, and is used for transmitting a clock synchronization message of a set period; the STVM sends a clock synchronization message with a corresponding cycle length to each multicast network; and the working virtual machine VM creates a periodic clock synchronization receiving task and receives a clock synchronization signal with a period length. Compared with the prior art, the clock synchronization method has the advantages that the clock synchronization process is simplified, fast and periodic clock synchronization is realized, and meanwhile, the clock synchronization precision is improved.

A user equipment (UE) can implement a method for reporting feedback for a multicast and / or broadcast service (MBS) when the UE is receiving multiple MBSs. The method may include receiving (402), during a time period when a base station generates a sequence of downlink assignments for the multiple MBSs, a plurality of downlink assignments included in the sequence of the downlink assignments, the plurality of downlink assignments scheduling a respective plurality of data transmissions of the MBS service; attempting to receive (404), from the base station, the plurality of data transmissions in accordance with the plurality of downlink assignments; and transmits (406), to the base station, feedback for the plurality of data transmissions, the feedback including an indication of a last successfully received downlink assignment of the plurality of downlink assignments.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a broadcast or a multicast (broadcast / multicast) scheduling configuration for a physical downlink control channel (PDCCH), the broadcast / multicast scheduling configuration identifying, for receiving broadcast / multicast communications, at least one of: a plurality of radio network temporary identifiers that are respectively associated with a plurality of beams, or one or more bandwidth parts. The UE may receive a broadcast / multicast communication associated with a broadcast / multicast control channel or a broadcast / multicast traffic channel via a physical downlink shared channel in accordance with the broadcast / multicast scheduling configuration for the PDCCH. Numerous other aspects are provided.

Techniques and apparatuses are described for machine-learning architectures for broadcast and multicast communications. A network entity processes broadcast or multicast communications using a deep neural network (DNN) to direct the one or more broadcast or multicast communications to a targeted group of user equipments (UEs) using the wireless communication system. The network entity receives feedback from at least one user equipment (UE) of the targeted group of UEs. The network entity determines a modification to the DNN based on the feedback. The network entity transmits an indication of the modification to the targeted group of UEs. The network entity updates the DNN with the modification to form a modified DNN. The network entity processes the broadcast or multicast communications using the modified DNN to direct the broadcast or multicast communications to the targeted group of UEs using the wireless communication system.

The invention discloses a communication method and a related device. The method and the device are applied to wireless networks supporting broadcast communication and / or multicast communication, such as a star flash network, an Internet of Vehicles and the like. The method comprises the steps that a first message is generated, a first field in the first message indicates that the type of the first message is a first type or a second type, the first type corresponds to non-reliability broadcast, the second type corresponds to reliability broadcast, or the first type corresponds to non-reliability multicast, and the second type corresponds to reliability broadcast; the second type corresponds to reliable multicast; and sending the first message to a first device. In the embodiment of the invention, the type of the first message is the first type or the second type, the first message can meet different reliability requirements, and the resource overhead is reduced.

A multicast method, apparatus, device, and system for a multicast group of a virtual network group are provided. The method includes: receiving a multicast data packet transmitted by a member of the virtual network group, a destination address of the multicast data packet being a multicast address; transmitting the multicast data packet to at least one target internal multicast interface, which is a dedicated interface for a multicast session; and transmitting the multicast data packet to all members or all local multicast group members of the virtual network group through the at least one target internal multicast interface. The disclosure implements multicast communication in a 5G virtual network (VN).

Disclosed in the embodiments of the present application are a multicast communication method and a related apparatus. A first communication apparatus constructs and forwards a first message, such that a second communication apparatus also belonging to a first multicast distribution tree (MDT) constructs the first MDT. The first message carries first multicast information, and the first multicast information indicates a communication apparatus comprised in a first multicast group. Therefore, the first message can be forwarded along a multicast forwarding path indicated by the first MDT, such that all the communication apparatuses on the multicast forwarding path can construct the first MDT according to the first message. The efficient construction of an MDT is realized by means of the first message carrying the first multicast information. Compared with the current MDT construction method, performance requirements with regard to communication apparatuses can be effectively reduced. The occupancy rate of network bandwidth resources is reduced, and the communication efficiency is improved. Therefore, the construction convergence rate of the MDT is improved, and rapid construction of the MDT is realized.

The invention discloses a penalty term-based multicast and unicast communication sensing integrated secure beam forming method, which comprises the following steps of: sending a multicast and unicast mixed signal to a user by a base station, decoding a multicast signal by a communication user by using NOMA (Non-Orthogonal Multiple Access), eliminating the interference of the multicast signal on a unicast signal, acquiring the reachable rate of multicast and unicast communication at the communication user, and transmitting the unicast and unicast communication to the base station; obtaining a multicast communication reachable rate at the radar user; the base station perceives the radar user and the target and obtains beam gains of the radar user and the target; a target eavesdropping unicast signal serving as an eavesdropper in the sensing process is obtained, and the unicast signal eavesdropping rate at the target position is obtained; establishing a hybrid multicast and unicast secure communication beam optimization problem, converting a relation between a trace of a positive semi-definite matrix in the problem and a maximum characteristic value into a penalty term, multiplying the penalty term by a penalty factor, putting the multiplied penalty term into a target function for constraint, and obtaining a convex optimization problem; solving the convex optimization problem through iteration to obtain multicast and unicast beams; the system has the advantages of good robustness and good performance.

A radio access network. RAN, participating in a multicast and broadcast services. MBS, session can implement a method for managing MBS communication. The method includes: transmitting (702), to a first UE operating in a connected state, a first multicast configuration for receiving MBS data in the inactive state: transmitting (703), to a second UE operating in the connected state, a second multicast configuration for receiving the MBS data in the connected state; and transmitting (708) the MBS data to the first UE operating in the inactive state, according to the first multicast configuration and the second UE operating in the connected state, according to the second multicast configuration.

The invention discloses a door lock cooperative voice transmission method and system, and the method comprises the steps: triggering a voice call connection process according to a voice call connection between a Bluetooth tag device carried by a mobile user and an initial door lock; according to a user face image captured by a door lock along the way through a camera and a Bluetooth label signal, the advancing direction of a user is recognized, and the door lock in the advancing direction is informed to enter a continuous preparation state through multicast communication; according to connection requests of a plurality of opposite users received by a middle door lock, when a path conflict is detected, re-planning a connection path of at least one user; and according to the coordination result, switching the connection path of the coordinated user to the door lock of the opposite door or the jumping door lock, and completing stable handover of the voice call when the user arrives at a new connection door lock. By utilizing the embodiment of the invention, seamless and stable connection of voice communication among a plurality of door locks can be realized, path conflicts are avoided, and the communication continuity and experience of a user in a mobile scene are improved.

The invention provides a wireless communication method based on a cellular Internet of Vehicles technology, a communication terminal and a vehicle, and relates to the technical field of vehicle communication. The method comprises the following steps: adding a first vehicle-mounted communication terminal and a second vehicle-mounted communication terminal of a target following vehicle in preset formation vehicles to a communication network of a target multicast group, and generating a target multicast routing table, so that a leading vehicle adopts a multicast communication mode, the multicast data can be sent to the second vehicle-mounted communication terminal of each target following vehicle in a targeted manner through the first vehicle-mounted communication terminal, so that the data is prevented from being sent to other vehicles. Due to the adoption of the multicast communication mode, the vehicle-mounted communication terminal of any vehicle in the target multicast group sends the multicast data, and the vehicle-mounted communication terminals of the other vehicles can receive the multicast data, so that unnecessary repeated transmission is avoided, the risk of network congestion is remarkably reduced, the information spreading efficiency is improved, and the user experience is improved. And meanwhile, all target following vehicles can receive the latest instruction in time, and synchronization and stability of a motorcade are maintained.

A method for wireless communication performed by a user equipment (UE) includes receiving, from a base station, a first indication to disable hybrid automatic repeat request (HARQ) feedback for a number of instances of a multicast transport block (TB). The method also includes receiving, from the base station, a second indication identifying a value of the number of instances of the multicast TB. The method further includes receiving, from the base station, one or more instances of the multicast TB. The method still further includes determining, based on the one or more received instances, whether the multicast TB is recoverable. The method further includes selectively transmitting, to the base station, HARQ feedback after all instances of the multicast TB have been transmitted by the base station based on the determination of whether the multicast TB is recoverable.

A multicast communication method in a hybrid cloud environment includes a control platform that obtains, from a multicast configuration interface, multicast member information for the gateway or a selection of enabling, for the gateway, a function of performing learning based on a layer 2 dynamic multicast protocol that is input by a tenant; the control platform configures the gateway based on the foregoing descriptions; when the multicast member information is input, the control platform configures the gateway to record a correspondence between a multicast group and a multicast member.

The invention discloses an emergency method and system based on door lock Bluetooth collaboration, and the method comprises the steps: detecting a floor network fault according to a monitoring result of a robot dog on a door lock multicast communication state, triggering the robot dog to carry out autonomous task distribution or platform scheduling distribution, and determining a floor which each robot dog is responsible for; according to the event that the robot dog arrives at the designated floor, Bluetooth communication links are sequentially established between the adjacent door locks according to a preset evacuation path, and relay alarm message transmission between the door locks is achieved through the IP forwarding function of the robot dog; according to the relay alarm message transmitted by the door lock in the Bluetooth link, each door lock whistles and alarms according to a planned time point, and synchronously reports personnel statistical information; and according to the door lock fault condition detected by the robot dog, the emergency pointing link is updated in a dominant skipping or autonomous identification mode. According to the embodiment of the invention, the intelligent level and rescue efficiency of building emergency response can be improved.

Disclosed is a method for implementing an intra-cloud and inter-cloud multicast function by virtual instances in a public cloud. The present invention mainly solves the issue of supporting a multicast in virtual instances of a public cloud user in a VPC or between VPCs, and also solves the issue of multicast communication between a user offline IDC and cloud-based virtual instances. When multicast members are added to a multicast group, the functions of the cloud-based virtual instances statically adding / leaving the multicast group and dynamically adding / leaving the multicast group by means of an IGMP protocol are supported, so that a cloud-based customer can use a multicast technology service in a service having a multicast requirement, providing the customer with a multicast service having low latency, fast access, and no packet loss. The method is applicable to various fields and live streaming services. The multicast is supported in a virtual network without changing a switch and a router on a computing node of a data center.

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 communication method used in a mobile communication system for providing a multicast / broadcast service (MBS) includes: providing, by a base station, two types of multicast control channels (MCCHs) being a first MCCH for a broadcast communication service and a second MCCH for a multicast communication service; and transmitting, by the base station to a user equipment, mapping information indicating a correspondence relationship between an MBS session identifier of an MBS session and a type of the MCCH for transmitting a Point-to-Multipoint (PTM) configuration corresponding to the MBS session.

The present invention provides a communication device, a communication method, and a storage medium. A communication device includes: a establishing unit configured to establish a first connection between the communication device and a first other communication device via one or more links using one or more frequency channels, and establish a second connection between the communication device and a second other communication device via one or more links using one or more frequency channels; a determining unit configured to determine a frequency channel required for a frame transmitted in multicast communication or broadcast communication to reach the first other communication device and the second other communication device, wherein the frequency channel is determined among a plurality of frequency channels used in the links of the first and second connections established by the establishing unit; and a transmitting unit configured to transmit a frame on the frequency channel determined by the determining unit.

The invention discloses a service performance evaluation method based on 5GLAN static multicast communication, and relates to the technical field of communication, and the method comprises the steps: monitoring the data distribution condition of a router to students in a static multicast group in real time through a preset route monitoring tool, recognizing the students with normal and abnormal data distribution, and carrying out the evaluation of the service performance of the static multicast communication. Recording and summarizing data distribution conditions in an evaluation period, and calculating and displaying a data distribution success rate; the original frame number and the sending starting time of the video data sent by the teacher are obtained, and the receiving starting time and the receiving frame number of the video data received by the students with normal data distribution are combined, so that the network performance of the static multicast communication network is calibrated; and finally, calculating a video transmission quality score by comparing the original frame pixel value of the video data sent by the teacher with the receiving frame pixel value of the video data received by the student, and comprehensively evaluating the service performance of the static multicast communication network in combination with the network performance. And the service performance of the static multicast communication network can be effectively evaluated through a multi-source parameter comprehensive judgment method.