136 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, 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.

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.

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).

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.

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 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.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, using a first transmit / receive (Tx / Rx) chain, a low-power wake-up signal (LP-WUS) communication, wherein the LP-WUS communication is conveyed via a set of single frequency network (SFN)-type transmissions from a set of transmitters associated with a set of cells. The UE may communicate, using a second Tx / Rx chain, in one or more resources in connection with the LP-WUS. Numerous other aspects are described.

The invention discloses a terrestrial digital television signal single frequency network coverage effect comprehensive test method and a terrestrial digital television signal single frequency network coverage effect comprehensive test system. The method comprises the following steps: carrying out fixed-point receiving test, road test and approaching test on a target area through a pre-constructed terrestrial digital television signal acquisition system; summarizing the collected test data to obtain a first test result of the single-frequency network coverage effect of the ground digital television signal in the target area; under the condition that the first test result comprises that the single-frequency network overlapping coverage interference area exists in the target area, performing shutdown joint debugging test on each to-be-tested transmitting station to obtain a second test result; and according to the first test result and the second test result, determining mutual interference stations of the single-frequency network overlapping coverage interference area and carrying out single-frequency network networking optimization. Through the combination of multiple test modes and the comprehensive analysis of the test result, the actual coverage condition of the terrestrial digital television single-frequency network can be comprehensively reflected, the single-frequency network with problems can be adjusted and optimized, and the coverage effect of the target area can be improved.

A base station may establish a cellular link with a user equipment (UE) according to a single frequency network scheme. The base station may then determine one or more control resource set (CORESET) transmission configuration indication (TCI) states and transmit signaling to configure the UE with the one or more CORESET TCI states. Additionally or alternatively, the one or more CORESET TCI states may be useable by the UE in performing communications with at least one of a first transmission reception point (TRP) and a second TRP associated with the cellular link with the cellular network.

A central unit (CU) transmits synchronization timing information for a multicast broadcast service (MBS) single frequency network (SFN) data transmission in a synchronous manner to multiple distributed units (DUs). The CU transmits the MBS SFN data transmission to the multiple DUs for synchronous transmission to one or more user equipments (UEs). A DU receives synchronization timing information for a MBS SFN data transmission in a synchronous manner with at least one additional DU. The DU transmits the MBS SFN data transmission with a timing based on the synchronization timing information.

A random access method and apparatus, a terminal, and a readable storage medium are provided. The method includes: selecting a target random access channel (RACH) resource associated with a first reference signal or a second reference signal; and using the target RACH resource to initiate random access, where the first reference signal is a single frequency network (SFN) specific reference signal, and the second reference signal is a cell / transmission reception point (cell / TRP) specific reference signal.

Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to a user equipment (UE) that transmits an indication of a preferred multi-UE cooperation scheme. In some examples, the UE can transmit the indication of the preferred multi-UE cooperation scheme via UE assistance information (UAI). The indication of the preferred multi-UE cooperation scheme can indicate one or more parameters, such as one or more additional UEs with which the UE supports cooperation and / or a preferred scheme type (e.g., single frequency network (SFN), transmission switching, coordinated multiple-input multiple-output (MIMO), and / or multi-transmission reception point (TRP), etc.).

According to an example implementation, a method for frequency offset reporting includes transmitting, by a first transceiver, a first tracking reference signal to a user device in a wireless communication system, transmitting, by a second transceiver, a second tracking reference signal to the user device, receiving, by the base station, a channel state information (CSI) reporting signal via an uplink channel, where the CSI reporting signal includes power estimation information. The method includes determining whether to pre-compensate a frequency of a downlink signal with frequency offset information based on the power estimation information, and transmitting, by at least one of the first transceiver or the second transceiver, the downlink signal with the pre-compensated frequency in response to the determination to pre-compensate the frequency of the downlink signal.

The embodiment of the present disclosure provides an uplink transmission control method and device, the method comprises: in a single downlink control information DCI scheduling based physical uplink shared channel PUSCH in a simultaneous transmission and multiple panel STxMP scenario, receiving transmission configuration information related to PTRS sent by a network device in a network scheduling multiple transmission and reception point TRP single frequency network SFN transmission mode; for non-codebook based PUSCH transmission, determining the actual sending parameters of the PTRS for PUSCH transmission based on the transmission configuration information related to the PTRS and the preset protocol rules, and sending the PTRS in the SFN transmission mode on the TO of the PUSCH corresponding to different antenna panels / TRP / beam TCI states / SRS resource sets. The scheme provided by the present disclosure can realize the enhanced indication of the SFN transmission of the PTRS, thereby supporting the CPE estimation of the terminal multi-antenna panel in the non-codebook based configuration under the SFN scheme in the STxMP transmission, so that the multi-point cooperative transmission is more effective, and the reliability and throughput of data transmission are effectively improved.