194 results about "Single-frequency network" patented technology

A device, such as a UE, and a Transmit and Receive Point (TRP) in a High-Speed Train-Single Frequency Network (HST-SFN) are disclosed that provide network-assisted frequency-offset compensation for the device. The device includes a receiver that receives a first reference signal and a second reference signal sent over a wireless network from a first TRP. The first reference signal corresponds to a QCL RS of the second reference signal. The device receiver determines delay-spread and average-delay information for a path between the first TRP to the device based on the first reference signal. The device receiver further receives a third reference signal from a second TRP that includes Doppler-shift and Doppler-spread information, and corresponds to a QCL RS of a fourth reference signal transmitted from the second TRP or corresponds to the second reference signal transmitted in a SFN manner from the first TRP.

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.

Methods, systems, and devices for wireless communications are described, the described techniques provide for per-transmission and reception point (TRP) power control for uplink transmissions using a single frequency network (SFN) configuration. A UE that establishes communications with a network via two or more TRPs using an SFN configuration for uplink transmissions may determine respective uplink transmission power levels for uplink transmissions to each TRP. The UE may transmit uplink transmissions to the two or more TRPs in accordance with the determined respective uplink transmission power levels. In some cases, the UE may receive a downlink control information message that includes transmit power command fields for each respective TRP based on transmission configuration indictor states associated with each TRP. In some cases, the UE may determine a set of power control parameters associated with each TRP. In some cases, the UE may transmit power headroom reports for each TRP.

An apparatus includes means for determining to use a set of transmit antenna arrangements for spatial division multiplexing or single frequency network based simultaneous transmission across multiple antenna arrangement physical uplink shared channel transmission; and means for determining to use the set of transmit antenna arrangements for a physical uplink control channel resource transmission, in response to two different transmission configuration indicator states being indicated and the apparatus being configured to apply physical uplink shared channel precoding for simultaneous transmission across multiple antenna arrangement physical uplink shared channel transmission.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, for a base station, a configuration message indicating a set of random access resources associated with monitoring by a relay node. The UE may transmit a random access message using the random access resources to the relay node and a timing advance associated with uplink data transmissions by the UE. The UE may then communicate with the base station via the relay node based on the random access message. In some examples, a UE may monitor for a relay reference signal from a relay node. The UE may determine a signal strength and a timing of the relay reference signal. The UE may determine whether an RSRP satisfies a threshold receive power, and may determine whether the timing of the relay reference signal is less than a timing threshold. The UE may transmit a downlink relay request to the base station to initiate relay communications.

A method and apparatus are provided, in which a higher layer configuration is received (2002), where the user equipment is configured with two timing reference signals for receiving a common communication having a same set of data from multiple signal sources. A downlink scheduling assignment including downlink control information is received (2004) in a control channel scheduling a physical downlink shared channel, wherein the downlink scheduling assignment comprises an indication of a transmission configuration indicator identifying two transmission configuration indicator states, which each indicate quasi-co-location information of a demodulation reference signal corresponding to the physical downlink shared channel relative to a respective one of the first and the second timing reference signals. The physical downlink shared channel is then received (2006) according to the downlink scheduling assignment including the downlink control information.

A method and apparatus are provided, in which a higher layer configuration is received (2002), where the user equipment is configured with two timing reference signals for receiving a common communication having a same set of data from multiple signal sources. A downlink scheduling assignment including downlink control information is received (2004) in a control channel scheduling a physical downlink shared channel, wherein the downlink scheduling assignment comprises an indication of a transmission configuration indicator identifying two transmission configuration indicator states, which each indicate quasi-co-location information of a demodulation reference signal corresponding to the physical downlink shared channel relative to a respective one of the first and the second timing reference signals. The physical downlink shared channel is then received (2006) according to the downlink scheduling assignment including the downlink control information.

A User Equipment is disclosed that determines a default Transmission Configuration Indicator (TCI) state in a wireless communication network in a High-Speed Train environment. The UE determines that wireless communication is being carried out in Frequency Range 2 and receives one or more Core Resource Sets (CORESETs) carrying a Physical Downlink Control Channel (PDCCH) with a Downlink Control Information (DCI); that a time offset between reception by the UE of the DCI and a corresponding Physical Downlink Shared Channel (PDSCH) is less than a predetermined time threshold; that the PDSCH is configured with a Single Frequency Network (SFN) scheme; that an option to enable two default TCI states for the UE is not configured; whether the PDCCH is configured with an SFN scheme; and based on a result of determining whether the PDCCH is configured with an SFN scheme, a default TCI state is determined for PDSCH reception.

A terminal according to one aspect of the present disclosure includes a receiving section that receives configuration information related to a single frequency network (SFN) physical downlink shared channel (PDSCH), and a control section that determines, based on a condition related to offset from reception of downlink control information (DCI) for scheduling the SFN PDSCH until reception of the SFN PDSCH, whether the DCI includes a transmission configuration indication (TCI) field, and the configuration information, a TCI state to be applied to the SEN PDSCH. According to one aspect of the present disclosure, it is possible to appropriately control operation related to a TCI state / default TCI state.

Certain aspects of the present disclosure provide a method for wireless communication by a user equipment (UE). The UE receives signaling configuring the UE with a control resource set (CORESET) activated with two transmission configuration indicator (TCI) states. The UE further receives a downlink control information (DCI) triggering transmission of aperiodic channel state information (CSI) reference signals (RSS) on aperiodic CSI-RS resources. The UE applies a quasi-colocation (QCL) assumption of at least one of the two TCI states for processing the aperiodic CSI-RSs, when a scheduling time offset is less than a threshold value and depending on whether same or different aperiodic CSI-RS resources are received from two transmission reception points (TRPs) associated.

This disclosure relates to techniques for performing beam failure recovery in a high speed single frequency network scenario in a wireless communication system. A wireless device may establish a cellular link with a cellular network according to a single frequency network scheme. The wireless device may determine one or more beam failure detection resources for each of multiple transmission reception points associated with the cellular network. The wireless device may detect beam failure for one or more of the transmission reception points using the beam failure detection resources.

A terminal according to one aspect of the present disclosure includes a receiving section that receives at least one of first information related to a physical downlink control channel (PDCCH) transmission scheme and second information related to a physical downlink shared channel (PDSCH) transmission scheme, and a control section that determines, based on at least one of the first information and the second information, at least one of a first transmission scheme to be applied to reception of a PDCCH and a second transmission scheme to be applied to reception of a PDSCH. The first transmission scheme is any one of a PDCCH transmission scheme for single transmission / reception point (TRP), a transmission scheme for PDCCH repetition transmission for multi-TRP, and a single frequency network (SFN) PDCCH transmission scheme, and the second transmission scheme is any one of a PDSCH transmission scheme for single TRP, a transmission scheme for PDSCH repetition transmission for multi-TRP, and an SFN PDSCH transmission scheme. According to one aspect of the present disclosure, it is possible to appropriately configure a transmission scheme for a PDCCH and a PDSCH.

Some embodiments include an apparatus, method, and computer program product for tracking reference signal (TRS) support of high speed use cases of 5G communications in a single frequency network (SFN), where a user equipment (UE) can measure a Doppler offset of a combined signal from two or more transmission reception points (TRPs) of the 5G communications system. A 5G node B (gNB) node can transmit a periodic, semi-persistent (SP), or aperiodic TRS with high measurement density that the UE uses to measure a Doppler offset of a combined signal. For example, the gNB can: trigger the aperiodic TRS based on a downlink assignment; and / or use lower layer signaling to arrange to transmit a semi-persistent TRS or a periodic TRS with a reduced periodicity. In some embodiments, the gNB can measure the Doppler offset based on an uplink signal, and transmit a TRS based on a pre-compensated Doppler frequency.

Methods, systems, and devices for wireless communication are described to support indication of a single frequency network (SFN) mode and associated parameters to a user equipment (UE), while the UE is operating in an idle mode. While operating in the idle mode, the UE may receive signaling from a transmission reception points (TRP), indicating that an SFN will be used for broadcast signaling received concurrently from multiple TRPs. Based on receiving the indication of the SFN, the UE may receive the broadcast signaling via a downlink control channel. For example, the UE may receive the broadcast signaling concurrently from a first TRP via a first beam and from a second TRP via a second beam, where the first and second beams may each be associated with a respective synchronization signal block (SSB).

A plurality of auxiliary transmitters associated with at least one main transmitter, transmitting broadcast area wide programming for their respective broadcast areas, wherein a mechanism enables switching on transmission of localized auxiliary information content by at least one of the plurality of auxiliary transmitters, wherein the at least one of plurality of auxiliary transmitters transmits localized auxiliary information content on a single frequency network transmission frequency, and wherein the localized auxiliary information content includes a data item that enables retrieval of promotional information from a remote server, when the data item is analyzed by a software application.

Some embodiments include an apparatus, method, and computer program product for tracking reference signal (TRS) support of high speed use cases of 5G communications in a single frequency network (SFN), where a user equipment (UE) can measure a Doppler offset of a combined signal from two or more transmission reception points (TRPs) of the 5G communications system. The UE is configured to transmit, using the transceiver (320), an uplink reference signal; in response to the uplink reference signal, receive from a first electronic device (140), a downlink assignment to enable an aperiodic Tracking Reference Signal, TRS, with high measurement density, wherein the aperiodic TRS shares a same quasi-co-located, QCL, parameter with a Physical Downlink Shared Channel, PDSCH, signal triggered by the downlink assignment; receive over a single frequency network, SFN, using the transceiver (320), the aperiodic TRS according to the downlink assignment; and determine a Doppler offset based at least on the aperiodic TRS to decode the PDSCH signal that comprises a combined signal from the first electronic device (140) and a second electronic device (150) in the SFN.

This disclosure provides an uplink transmission control method and apparatus. The method includes: in a STxMP scenario where multiple uplink antenna panels simultaneously transmit a Physical Uplink Shared Channel (PUSCH) scheduled based on a single downlink control information (DCI), under a network scheduling of multiple transmit and receive points (TRP) single-frequency network (SFN) transmission mode, receiving transmission configuration information related to the Phase Tracking Reference Signal (PTRS) sent by network devices; for codebook-based PUSCH transmission, determining the actual PTRS transmission parameters for PUSCH transmission based on the PTRS-related transmission configuration information and preset protocol rules; and transmitting PTRS according to the SFN transmission mode at the transmission timing (TO) of PUSCH corresponding to different antenna panels / TRP / beam TCI states / SRS resource sets. The scheme provided by this disclosure can achieve enhanced indication of PTRS under SFN transmission, thereby supporting CPE estimation of terminal multi-antenna panels under codebook-based configuration in STxMP transmission, effectively improving the reliability and throughput of data transmission.

Embodiments of the present disclosure relate to a method and apparatus for demodulation reference signal (DMRS) ports and phase tracking reference signal (PTRS) ports in a single frequency network (SFN)-based physical uplink shared channel (PUSCH). A terminal device receives a PTRS-DMRS association indication from a network device. The indication includes a PTRS-DMRS association field having a first portion indicating a scheduled DMRS port and a second portion indicating a PTRS port associated with the DMRS port. Based on the indication, the terminal device can simultaneously transmit uplink signals to the network device in an SFN manner via multiple antenna panels. This enables stable and highly accurate SFN uplink transmission using the DMRS port and the corresponding PTRS port.

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive control signaling that enables uplink communication with a network via a first transmit and receive point (TRP) using a first set of antenna elements of the UE and via a second TRP using a second set of antenna elements of the UE during a same set of time and frequency resources according to a single frequency network (SFN) configuration. The control signaling may include a set of parameters that enable the uplink communication with the network via a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH). The control signaling may also include a set of control resources including an indication for the UE to transmit according to an SFN transmission scheme. The UE may transmit the uplink communication to the network via the first TRP and the second TRP according to the SFN configuration.

A reception method and apparatus for use in a multi-cell orthogonal frequency division multiple access (OFDMA) wireless system. In a unicast receive mode during a first receive time period, a first group of orthogonal frequency division multiplexing (OFDM) symbols is received by a mobile device from multiple of a plurality of antennas at a serving base station. In a single-frequency-network (SFN) receive mode during a second receive time period, a second group of OFDM symbols is received by the mobile device from one of a plurality of antennas at the serving base station. The transition between the first receive time period and the second receive time period occurs during a cyclic prefix or a cyclic postfix between OFDM symbols, and the plurality of antennas produce a first beam pattern during the unicast receive mode and a second beam pattern during the SFN receive mode.

Various solutions for connected-mode mobility enhancements with tiered radio resource management (RRM) are described. An apparatus may perform a first measurement based on a first downlink (DL) reference signal (RS) received from each of a source network node and a target network node. The first DL RS includes identification information of a single frequency network (SFN) area without identification information of any network node. Also, the apparatus may perform a second measurement based on a second DL RS received from each of the source network node and the target network node. The second DL RS includes identification information of the source network node or the target network node. Then, the apparatus may transmit a switching request including information of the target network node to the source network node based on the first measurement and the second measurement, and receive a switching command from the source network node.

Methods, systems, and devices for wireless communication are described. Some wireless communication systems may support single frequency network (SFN) signaling to increase signal strength and reliability for uplink and downlink data channel communications. In some systems, a user equipment (UE) may receive a control message indicating a configuration of an uplink sounding reference signal (SRS) communication scheme for communicating one or more SRS. The control message may indicate respective antenna ports of the UE for transmitting the one or more SRSs and each associated with at least two directional beams. The UE may then transmit the one or more SRSs via the at least two directional beams according to the SFN communication scheme.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a mobile station may receive a unified transmission configuration indicator (TCI) indication indicating a first TCI state associated with a physical downlink shared channel (PDSCH) communication, wherein time resources associated with the PDSCH communication at least partially overlap with time resources associated with a control resource set (CORESET) associated with a second TCI state different from the first TCI state. The mobile station may prioritize reception of a physical downlink control channel (PDCCH) communication associated with the CORESET based at least in part on the second TCI state being different from the first TCI state. Numerous other aspects are described.

This application discloses an energy-saving method and related apparatus applicable to an energy-saving scenario of a base station. The method includes a step in which a network device determines a target symbol within a multimedia broadcast multicast service single frequency network (MBSFN) subframe of a first cell. The target symbol is a cell-specific reference signal (CRS) symbol, a demodulation reference signal (DMRS) symbol, a physical downlink control channel (PDCCH) symbol dedicated to a user equipment (UE), and a physical downlink shared channel (PDSCH) symbol dedicated to the UE. When the load of the first cell is lower than a preset threshold, the network device reduces the transmission power of the target symbol. When the load of the first cell is higher than the preset threshold, the network device increases the transmission power of the target symbol. In this application, the overall transmission power of the cell is adjusted by simultaneously adjusting the transmission powers of the four types of symbols, and the UE does not need to be notified via an air interface message. Therefore, the overall transmission power of the cell can be adjusted quickly, and the service stability of the base station can be guaranteed while realizing energy saving.

A terminal according to an aspect of the present disclosure includes: a receiving section that receives downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) in a control resource set associated with a default quasi co-location (QCL) assumption for the PDSCH; and a control section that determines whether to apply, to the PDSCH, a PDSCH reception method being either of single-DCI based multi-transmission / reception point (TRP) or a high speed train (HST)-single frequency network (SFN) scheme, on the basis of whether a physical downlink control channel (PDCCH) reception method being any one of PDCCH repetition, SFN-PDCCH repetition, and an HST-SFN is configured for the control resource set. According to an aspect of the present disclosure, a PDSCH can be appropriately received, depending on a PDCCH reception method configured.

A wireless device may receive one or more configuration parameters indicating a single frequency network (SFN) scheme. The wireless device may further receive a command activating at least two transmission configuration indicator (TCI) states for a control resource set (coreset). The wireless device may monitor, via the coreset, downlink control channels based on the at least two active TCI states and determine a radio link quality based on the at least two active TCI states of the coreset, when the one or more configuration parameters indicate the SFN scheme. The wireless device may further transmit an uplink signal indicating the radio failure, when the radio link quality indicates a radio failure.

The present disclosure relates to a 5G large tower broadcast data transmission system, method and device, belonging to the technical field of data transmission, the method comprising: a first transmission network element, the first transmission network element is used for receiving the unidirectional service data broadcasted by the 5G large tower from the single frequency network output; a second transmission network element, the second transmission network element is unidirectional data transmission with the first transmission network element, the second transmission network element is used for receiving the unidirectional service data based on unidirectional static configuration; the unidirectional service data is output to the associated user end; wherein the unidirectional static configuration is constructed based on the specific configuration parameters output unidirectionally by the first transmission network element.

A method for configuring a physical uplink shared channel (PUSCH) in a wireless communication network includes: for single frequency network (SFN) transmission of an uplink PUSCH, configuring different transmission configuration indications (TCIs) for different antenna panels of a terminal, wherein the TCI is associated with beam information, the different TCIs are associated with a same transmission resource, the transmission resource comprises a time-domain resource and a frequency-domain resource, and the different antenna panels perform the SFN transmission of the PUSCH using space division multiplexing (SDM).

Methods, systems, and devices for wireless communications are described. A method for wireless communication may include receiving a single frequency networked composite reference signal (SFNed RS) at a first port of a user equipment (UE) and receiving a reference signal (RS) at a second port of the UE that is different than the first port of the UE. The method may also include performing channel estimation for at least one of the first port or the second port based at least in part on receiving the SFNed RS and the RS. A method for wireless communication may include transmitting a first portion of an SFNed RS from a first port of a first transmit / reception point to a UE and transmitting a downlink control information message to the UE that indicates at least one transmission configuration indicator state identifier that identifies the SFNed RS.