73 results about "Broadcast multicast" patented technology

Methods, systems, and devices may assist in broadcast, multicast, or unicast on sidelink for 5G eV2X. The following mechanisms for broadcast, multicast, or unicast on sidelink for Vehicle to everything (V2X). Broadcast on sidelink may include methods, systems, or devices for broadcast occasions or monitoring window. Multicast on sidelink may include methods, systems, or devices for multicast occasions or group ID. Unicast on sidelink may include methods, systems, or devices for unicast occasions, UE ID, transmitter initiated transmission, or receiver initiated. Methods, systems, or devices may use communication occasions for platooning.

Methods, systems, and devices for wireless communications are described. A device may receive a set of demodulation reference signals (DMRSs) over a multi-path channel on a set of resources in accordance with a reference signal pattern. The reference signal pattern may be associated with a non-uniform frequency spacing that results in a row-sampled Discrete Fourier Transform (DFT) matrix associated with the reference signal pattern having a lower coherence than other row-sampled DFT matrices. Additionally or alternatively, the device may receive a set of tracking reference signals (TRSs) over the multi-path channel. The set of TRSs may be specific to wide-area terrestrial broadcast services, single frequency network (SFN)-based broadcast services, multimedia broadcast multicast services (MBMSs), or the reference signal pattern. The device may perform channel estimation based on receiving one or both of the set of DMRSs or the set of TRSs over the multi-path channel.

According to an embodiment of the disclosure, a base station (BS) is configured to: transmit traffic to at least one user equipment (UE) connected to the BS via a unicast scheme; based on information about a number of UEs connected to the BS to use a particular application, a particular service, or a particular session, or information of traffic to be used by the UE, determine whether to switch a transmission scheme of the traffic from the unicast scheme to a broadcast / multicast scheme; and as the broadcast / multicast scheme is determined as the transmission scheme of the traffic, transmit a message informing that the transmission scheme of the traffic is to be switched.

According to an embodiment of the disclosure, a base station (BS) is configured to: transmit traffic to at least one user equipment (UE) connected to the BS via a unicast scheme; based on information about a number of UEs connected to the BS to use a particular application, a particular service, or a particular session, or information of traffic to be used by the UE, determine whether to switch a transmission scheme of the traffic from the unicast scheme to a broadcast / multicast scheme; and as the broadcast / multicast scheme is determined as the transmission scheme of the traffic, transmit a message informing that the transmission scheme of the traffic is to be switched.

Disclosed are techniques for wireless communication. In an aspect, a network entity, such as a location server or base station, may determine a positioning reference signal (PRS) frequency hopping configuration that specifies a plurality of PRS hops within a PRS resource set, each PRS hop occupying a specified set of one or more contiguous physical resource blocks, and further specifying a time gap between PRS hops to allow a sufficient retuning gap for a user equipment (UE) with reduced BW capability and / or relaxed processing time. The network entity may transmit the PRS frequency hopping configuration to at least one UE, e.g., via broadcast, multicast, groupcast, or unicast over Uu or PC5 links. The pre-configured time gap between PRS hops allows a reduced capacity UE to retune its RF circuit and thus allow PRS measurements over a larger bandwidth than what the UE can support without frequency hopping.

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.

Provided are a broadcast multicast service (MBS) transmission method, device, terminal and apparatus, the method being applied to an access network device, the method comprising: receiving a broadcast data packet sent by a core network device, the broadcast data packet comprising a target internet protocol (IP) address; determining a plurality of terminals that have established a protocol data unit PDU session, the plurality of terminals including a first terminal, the IP addresses of the plurality of terminals being the same, and the IP addresses of the plurality of terminals being the target IP address; and sending the broadcast data packet to the plurality of terminals through the target IP address based on the PDU session established by the first terminal. According to the scheme provided by the invention, the transmission of the MBS service can be realized without modifying the terminal, the core network equipment and the access network equipment, and the broadcasting effect is realized.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control signaling from a base station that indicates a multicast or broadcast wake up signal (WUS) format. The UE may receive a multicast or broadcast WUS from the base station during a WUS monitoring occasion of a connected mode discontinuous reception (C-DRX) cycle in accordance with the control signaling. The multicast or broadcast WUS may indicate upcoming transmissions for a set of multicast or broadcast services (MBSs). If, for example, the UE is subscribed to a first MBS from the set of MBSs and the multicast or broadcast WUS indicates an upcoming transmission for the first MBS, the UE may monitor for the upcoming transmission during an active duration of the C-DRX cycle. Otherwise, the UE may enter a sleep mode to conserve power.

This terminal comprises: a reception unit that receives system information from a base station; and a control unit that, on the basis of the system information, sets individual common frequency resources (CFR) which pertain to a broadcast multicast-broadcast services (MBS) function and are for a terminal having reduced functionality. The reception unit monitors a search space in the CFR, receives downlink control information (DCI), and receives, from the base station, a group common physical downlink shared channel (PDSCH) scheduled by the DCI.

Methods and systems for two-dimensional (2D) coding are described for broadcast, multicast or groupcast applications. Two or more information code blocks (CBs) are transmitted to a plurality of intended receiving nodes. One or more cross-CB check blocks are generated, each cross-CB check block being generated based on a set of cross-CB bits, the set of cross-CB bits including at least one bit selected from each of at least two of the information CBs. At least one cross-CB check block is transmitted to at least one of the intended receiving nodes.

The application provides a power control parameter determination method and device. The method comprises: a terminal acquiring relevant parameters of unicast and relevant parameters of multicast; and the terminal determining a power control parameter of a physical uplink control channel (PUCCH) according to the relevant parameters of unicast and the relevant parameters of multicast. According to the embodiment of the application, the terminal determines the power control parameter of the PUCCH channel used for transmitting the HARQ-ACK codebook of the broadcast multicast according to the relevant parameters of unicast and the relevant parameters of multicast, so that the terminal can better perform power control, thereby realizing power efficiency maximization, meeting the demand of PUCCH transmission power requirement, and saving power.

The application proposes a method for parsing and mapping emergency broadcast messages to 3GPP broadcast, taking the emergency information adaptation device as a heterogeneous system core gateway, receiving the emergency broadcast messages conforming to the GY / T 385-2023 specification and performing validity verification, realizing accurate mapping of core fields such as message identification, level, coverage area, content, time parameter, etc. to corresponding fields of 5G multicast broadcast multimedia service, encapsulating as 5G broadcast session data according to the 3GPP TS 26.348 specification and sending to the broadcast multicast service center of the 5G core network through the standard interface. The application realizes end-to-end protocol conversion of emergency broadcast and 5G broadcast, the system is low-coupled and easy to deploy, resource utilization is efficient, and accurate and rapid delivery of emergency broadcast messages to various terminals is ensured, and the scheme has openness and interoperability.

Methods, apparatus, systems, architectures, and interfaces for receiving a Multimedia Broadcast Multicast System (MBMS) service performed by a wireless transmit receive unit (WTRU) are provided. A method may include any of: receiving MBMS service configuration information including information indicating, for an MBMS service, an association between a transmission mode (TM) and a bandwidth part (BWP); receiving the MBMS service using a first BWP according to the received MBMS service configuration information; detecting a trigger for changing use of a BWP from using the first BWP to using a second BWP for receiving the MBMS service; determining a TM associated with the second BWP according to an association between a TM and the second BWP, according to an association indicated by the information included in the MBMS service configuration information; and receiving the specific MBMS service via the second BWP according to the TM associated with the second BWP.

Disclosed are a hybrid automatic repeat request-acknowledgment (HARQ-ACK) feedback method, a terminal, and a base station. The method includes: transmitting broadcast multicast scheduling signaling to a terminal for indicating the terminal to multiplex, when it is detected that a preset condition is satisfied, a first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling on the uplink resource corresponding to unicast, the preset condition being that both a HARQ-ACK feedback slot indicated by the broadcast multicast scheduling signaling and a slot in which the uplink resource is located exist in a preset window; and receiving uplink data transmitted by the terminal through the uplink resource when the preset condition is satisfied, and obtaining a first HARQ-ACK codebook multiplexed on the uplink resource. The protocol design and complexity of HARQ-ACK feedback for broadcast multicast is simplified.

Methods for handling Media-based Modulation (MBM) in a wireless network (1000) by a Mission Critical (MC) Gateway (GW) User Equipment (UE) (300) are provided. The method includes storing information associated with an identifier at the MC gateway UE (300) in response to receiving an MC gateway Multimedia Broadcast Multicast Services (MBMS) bearer announcement from an MC client (100). The MC gateway UE (300) uses the identifier and the information to activate for monitoring the MBMS bearer by the MC gateway UE (300). Further, the method includes sending an MBMS listening status report to the MC client (100) based on the MC GW MBMS bearer announcement. Further, the method includes establishing a communication channel with the MC client (100) based on a parameter to receive an MC service data from the MC gateway UE (300), where the MC gateway UE (300) forwards the MC service data to the MC client (100).

A method includes, generating a schedule for an asset tag group, the schedule defining: a multicast trigger time for transmission of a multicast trigger to the asset tag group; and for each asset tag in the asset tag group, a transmit time succeeding receipt of the multicast trigger and unique to the asset tag, and a wake window intersecting the transmit time and the receipt of the multiact trigger. The method also includes, at the node network: broadcasting the multicast trigger; and, at an asset tag in the asset tag group, entering a wake mode; receiving the multicast trigger; transmitting a ranging signal; and entering the sleep mode. The method further includes, at the node network: receiving ranging signals from the asset tag group; and deriving locations of the asset tags in the asset tag group based on the ranging signals received by the node network.

Methods for handling Media-based Modulation (MBM) in a wireless network (1000) by a Mission Critical (MC) Gateway (GW) User Equipment (UE) (300) are provided. The method includes storing information associated with an identifier at the MC gateway UE (300) in response to receiving an MC gateway Multimedia Broadcast Multicast Services (MBMS) bearer announcement from an MC client (100). The MC gateway UE (300) uses the identifier and the information to activate for monitoring the MBMS bearer by the MC gateway UE (300). Further, the method includes sending an MBMS listening status report to the MC client (100) based on the MC GW MBMS bearer announcement. Further, the method includes establishing a communication channel with the MC client (100) based on a parameter to receive an MC service data from the MC gateway UE (300), where the MC gateway UE (300) forwards the MC service data to the MC client (100).

An evolved multimedia broadcast multicast services (eMBMS) core may map sensor data or telemetry data from a central repository server (e.g., tag it with an area code from where the data is being generated) to a service area. The eMBMS core may inform the radio access network to create a service area for the specific area code, which may be part of or an entire city, county, or the like. Then the radio access network may broadcast the data to the vehicles or devices in the specific area code.

A method and apparatus in a communication node used for wireless communication are disclosed. A first node receives a first RRC message, the first RRC message comprising a first domain, at least one second domain, and a third domain; receiving a second RRC message after receiving the first RRC message, the second RRC message including a second domain and a fourth domain; it is determined whether to apply the third domain of the first RRC message to the second domain of the second RRC message according to the fourth domain of the second RRC message. The scheme provided by the invention has the advantages that the problem of carrying configuration of broadcast / multicast, especially the problem of association between the PTP branch and the PTM branch, is solved; the stored configuration parameters are reused as much as possible, and the signaling overhead is reduced.

A base station may transmit a broadcast / multicast service in a multicast broadcast single frequency network (MBSFN) area multicast communication. A method of wireless communication at a base station in accordance with an aspect of the present disclosure comprises determining a broadcast / multicast service to be provided to a user equipment (UE) in a multicast broadcast single frequency network (MBSFN) area, and transmitting a tracking reference signal (TRS) to the UE, the TRS indicating information associated with receiving the broadcast / multicast service by the UE.

A terminal according to the present invention comprises: a reception unit for receiving, from a base station, two from among a unicast Physical Downlink Shared Channel (PDSCH), a broadcast Multicast-Broadcast Services (MBS)-PDSCH, and a multicast MBS-PDSCH; and a control unit that estimates that the two from among the unicast PDSCH, the broadcast MBS-PDSCH, and the multicast MBS-PDSCH are multiplexed in the same slot, adjacent slots, or in the same slot and an adjacent slot.

Disclosed are example embodiments of methods, apparatuses and systems supporting beam diversity for multimedia broadcast multicast services. A method may comprise receiving information of one or more beams and abeam-specific repetition pattern for at least one of the one or more beams for transmission of a service from a network device, and receiving the service on the at least one of the one or more beams based on the beam-specific repetition pattern.

Provided are sensing communication method, apparatus, and system. An apparatus such as a central device can broadcast or multi-cast or unicast query message(s), so that other apparatus(es) such as one or more sensing devices can obtain the query message(s) and respond with sensing result(s) in response to the obtained query message(s). Query may be conducted for one or more rounds. In a round, the query messages can be of different levels, and as a result, more flexible and detailed query would be achieved. Moreover, query may be conducted for several rounds, and the apparatus may broadcast or multi-cast or unicast query messages of different levels in several rounds, so that other apparatus(es) can respond with sensing result(s) in response to the obtained query messages in several rounds, where a low level / coarse level query message is for initial query, and a high level query message is for subsequent fine grained query.

Embodiments of the present disclosure provide methods and apparatuses for group message modification and cancel. A method performed by an exposure node includes receiving a group message request from an application node. When the group message request is for a modification of group message delivery and includes group message payload, the method further includes transforming the group message payload into a file. The method further includes sending the file to a second broadcast multicast node.

A two-dimensional (2D) coding method and system is described for broadcast, multicast, or groupcast applications. Two or more information code blocks (CBs) are transmitted to multiple intended receiving nodes. One or more cross CB check blocks are generated, each cross CB check block being generated based on a set of cross CB bits, the set of cross CB bits including at least one bit selected from each of at least two of the information CBs. At least one cross CB check block is transmitted to at least one of the intended receiving nodes.

A system and apparatus are disclosed herein for vehicle to everything (V2X) wireless communication. A V2X wireless transmit / receive unit (WTRU) may receive a vehicle to everything (V2X) message including configuration information and a road side unit (RSU) address. The WTRU may then transmit a message to the RSU according to the configuration information including multimedia broadcast multicast services (MBMS) data. The configuration information may include a MBMS service descriptor. One or more of the V2X messages may include priority information, WTRU type information, or both.

Methods and procedures may be needed to enable communication and proper operation to support coexistence of low-cost WTRUs and normal WTRUs.SOLUTION: Uplink transmissions and multimedia broadcast multicast service (MBMS) may be supported in a WTRU operating on a reduced bandwidth within an overall system bandwidth by receiving an uplink (UL) resource allocation within the reduced bandwidth and sending a transmission via the UL resource allocation. The reduced bandwidth may include a small number of physical resource blocks (PRBs) that do not overlap with PRBs located at the band edge of the entire system bandwidth including the system PUCCH. The UL resources may be located at both band edges of the reduced bandwidth, may be a PRB pair at the same frequency of the reduced bandwidth, or may be a PRB pair in the first slot of the first subframe and the second slot of the second subframe of the reduced bandwidth.SELECTED DRAWING: Figure 4

A system and apparatus are disclosed herein for vehicle to everything (V2X) wireless communication. A V2X wireless transmit / receive unit (WTRU) may receive a vehicle to everything (V2X) message including configuration information and a road side unit (RSU) address. The WTRU may then transmit a message to the RSU according to the configuration information including multimedia broadcast multicast services (MBMS) data. The configuration information may include a MBMS service descriptor. One or more of the V2X messages may include priority information, WTRU type information, or both.

The embodiment of the present invention provides a candidate control channel configuration method, a terminal and a base station, wherein the method applied to the terminal includes: obtaining at least one first search space for broadcast multicast and at least one second search space for non-broadcast multicast configured by the base station; wherein the first search space is a first CSS, a first USS or a hybrid search space, and the hybrid search space is a search space for candidate PDCCHs of both the first CSS and the first USS; the second search space includes a second CSS and a second USS; based on the predetermined allocation priority order of the candidate PDCCHs of the first search space and the second search space, the candidate PDCCHs are allocated, and control channel detection is performed on the first search space and / or the second search space of the allocated candidate PDCCHs. The embodiment of the present invention implements the allocation of candidate PDCCHs for broadcast multicast in NR.

Systems, methods, apparatuses, and computer program products for restoration of multicast / broadcast service upon multicast / broadcast failure with restart are provided. For example, a method may include detecting a restart of a multicast / broadcast user plane function that was supporting a packet forwarding control protocol session for a multicast / broadcast session. The method may also include re-creating a packet forwarding control protocol session for the multicast / broadcast session. The method may further include providing addressing information for the data delivery of the broadcast / multicast session to the multicast / broadcast user plane function and instructing the multicast / broadcast user plane function to use this addressing information for the broadcast / multicast session if possible.