239results about "Multiplex code allocation" patented technology

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive a demodulation reference signal (DMRS) configuration that indicates a code-division multiplexing (CDM) group configured for the UE; receive a first indication of an antenna port, included in the CDM group, assigned to the UE for reception of a first set of DMRS transmissions; receive a second indication of whether a second set of DMRS transmissions for another antenna port, included in the CDM group, is present or absent for another UE; and perform channel estimation based at least in part on the first indication of the antenna port and the second indication of whether the second set of DMRS transmissions for the other antenna port is present or absent. Numerous other aspects are provided.

A method includes receiving, at a user equipment device (UE) from a transmission and reception point (TRP), an uplink CSI measurement configuration including a sounding reference signal (SRS) resource configuration indicating one or more of SRS resource randomization configurations of a cyclic shift, a comb offset, and a time domain orthogonal cover code (TD-OCC); and transmitting SRSs in a sequence of symbols, according to the SRS resource configuration, wherein the SRSs are determined according to the one or more of SRS resource randomization configurations of the cyclic shift, the comb offset, and the TD-OCC, values of the one or more of SRS resource randomization configurations being randomized symbol-by-symbol according to at least one of a cell-specific identity (IDcell) and a UE-specific identity (IDue).

Embodiments herein provide techniques for transmission of a physical uplink control channel (PUCCH) in a wireless cellular network. For example, transmission schemes are provided for sequence-based transmission of a PUCCH and / or to improve PUCCH coverage. User equipment (UE) may: determine uplink control information (UCI) pay load information for the PUCCH with a PUCCH format 1; determine a sequence for transmission of the PUCCH based on the UCI pay load information; and map the determined sequence to allocated resources for the PUCCH format 1 for transmission.

Embodiments include method, for a user equipment (UE) to transmit or receive a plurality of physical data channels in a wireless network. Such methods include receiving, from the wireless network, an indication of a Transmission Configuration Indicator (TCI) state that includes one or more source reference signal (RS) pairs. Each source RS pair has a pair of quasi-colocation (QCL) relations with antenna ports, for demodulation reference signals (DM-RS), that are mapped to a plurality of code-division multiplexing (CDM) groups. Such methods include receiving or transmitting the plurality of physical data channels based on the QCL relations for the one or more source RS pairs of the indicated TCI state. Other embodiments include complementary methods performed by a wireless network, and UEs and wireless networks configured to perform such methods.

Methods, systems, and devices for increasing transmission capacity of sounding reference signals (SRS) in mobile communication technology are described. An example method for wireless communication includes receiving, by a wireless device from a network node, a configuration comprising A orthogonal code sequences for a sounding reference signal (SRS) resource, wherein each of the A orthogonal code sequences is configured for L adjacent SRS symbols within the SRS resource, wherein L is a length of each of the A orthogonal code sequences, and wherein L and A are positive integers, and transmitting a reference signal that is generated based on the configuration.

This terminal comprises: a control circuit that determines one sequence or one combination from a plurality of sequences or a plurality of combinations of sequences, depending on information regarding the number of information bits in uplink transmission without reference signals; and a transmission circuit that transmits one sequence or a sequence included in one combination.

A system and method for enabling downlink signal transmission in a Multiple-Input Multiple-Output (MU-MIMO) system is provided. The method comprises of creating a scheduling information based on MU-MIMO Scheduling of a plurality of User equipments (UES), multiplexing the plurality of UES paired based on the scheduling decisions across time, frequency and code, inputting transport blocks of each UE pushed on to a Downlink shared channel (DLSCH), performing bit processing of each of the CRC encoded UEs, inputting Code-rate (MCS) for data modulation mapping on a post bit processed data, assigning DM-RS ports to the UE based on allocated MCS and number of antenna ports from a scheduling information structure, adding, a Partial Port Occupancy information (P-Poi) for each UE along with the scheduler information structure required for demodulation at UE and enabling optimal channel estimation at UE by adding new DM-RS port combinations using reserved fields in the DCI messaging.

systems and methods include a transmitter with a control unit that is configured to generate a code, including data identifying a plurality of regions and a transmitter-specific cyclic shift scheme. The cyclic shift scheme results in a re-arrangement of the regions (using a change of time offset) that is different (transmitter-specific) for each of the transmitters. The transmitter generates a signal based on the code and transmits the signal via an antenna. The radar system includes a receiver configured to receive an echo of the signal via a second antenna that is reflected from a target and identifies the transmitter from the echo based on the transmitter-specific cyclic shift scheme.

The invention provides a communication method and a communication device, and relates to the technical field of communication. According to the invention, multiplexing of resources occupied by multiple channels such as PDSCH and PUSCH can be realized, so that the system capacity is improved. The method comprises the following steps: receiving first information from network equipment, wherein the first information is used for indicating a first orthogonal sequence; on the first time-frequency domain resource, using a first orthogonal sequence to receive first data sent by the network device through a first channel, and / or, sending second data to the network device through a second channel; wherein the first channel comprises a physical downlink shared channel (PDSCH) and / or a non-physical downlink shared channel (NPDSCH), and the second channel comprises one or more of the following: a physical uplink shared channel (PUSCH), a non-physical uplink shared channel (NPUSCH), a physical random access channel (PRACH) or a non-physical random access channel (NPRACH).

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein disclose a method and a base station (100) for managing sounding reference signal (SRS) transmission in a wireless communication. The method includes receiving the SRS transmitted from a group of user equipments (UEs) (200a-200d) in the wireless communication over same time-frequency resource. The method also determines the transmission variant by decoding the SRS. Further, the method includes performing one of: estimating at least one channel of receiving the SRS from each UE of the group of UEs (200a-200d) in the slot using a first receiver when the transmission variant is one of the C-CDM-C-CS variant or the V-CDM-C-CS variant, and estimating at least one channel of receiving the SRS from each UE of the group of UEs (200a-200d) in the slot using a second receiver when the transmission variant is one of the C-CDM-C-CS variant or the C-CDM-V-CS variant.

A method for transmitting data includes: a terminal device receives DCI, wherein the DCI is used for scheduling PDSCH transmission in multiple time domain resource units, and the DCI is further used for indicating K TCI states, and K is a positive integer; and the terminal device determines, from the K TCI states, a TCI state used for the PDSCH transmission in the multiple time domain resource units according to at least one of following information: the number of CDM groups to which an adopted DMRS port belongs, a configuration of PDSCH repetition transmission scheme, a configuration scheme for the number of the multiple time domain resource units, and a physical resource configuration in one time domain resource unit of the multiple time domain resource units.

A method and system for improving channel estimation for multi-user, multiple-input, multiple-output (MU-MIMO) systems through dynamic DM-RS port allocation in a 5G New Radio network is provided. The method comprises of allocating, by a Scheduler aware UE port allocation unit, one or more MU-MIMO ports to a plurality of code division multiplexing (CDM) groups for a plurality of UE users, performing, by a code selection unit, a code selection based on a number of allocated MU-MIMO ports, determining, by a spreading factor unit, a spreading factor allocated for each of the MU-MIMO ports in each of the plurality of CDM groups, determining, by a signalling unit, a Downlink Control Information (DCI) signalling of a Partial Port Occupancy (P-Poi) transmission for each UE and obtaining, by a channel estimation unit, channel estimates at the receiver through VSFOCC de-spreading based on the P-POI assigned for each of the MU-MIMO ports.

When a plurality of terminals share the same resources in a wireless communication system, and when control information such as acknowledgement / negative acknowledgement (ACK / NAK) information or scheduling information is transmitted, a method of efficiently performing code division multiplexing (CDM) is required to distinguish the plurality of terminals. In particular, it is necessary to develop a method by which a code sequence of CDM can be selected and used according to each cell condition. Provided is a method of forming a signal in a wireless communication system in which a plurality of terminals commonly share frequency and time resources. The method includes the operations of receiving condition information in a cell; selecting one of a plurality of time domain orthogonal sequences having different lengths, according to the condition information; and allocating the selected time domain orthogonal sequence to a control signal symbol block.

A communication device according to an embodiment includes a memory and one or more processors coupled to the memory. The one or more processors are configured to: receive an OFDM signal and convert the OFDM signal into a time-axis waveform signal of a baseband; extract a part of the time-axis waveform signal, and calculate a correlation value between the extracted signal and a known signal; execute FFT on the time-axis waveform signal; extract a part of a frequency-axis waveform signal on which the FFT is executed, and calculate a degree of similarity between the extracted signal and a known signal; and estimate a switching timing between uplink communication and downlink communication in the communication device based on a calculation result of the similarity degree.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may account for the application of orthogonal cover coding (OCC) to an uplink transmission when determining the transport block size (TBS) for the uplink transmission. OCC may be used to multiplex transmissions from multiple UEs and may involve spreading information. Described techniques may involve accounting for the spreading of information bits when determining the TBS for the uplink transmission to which OCC is applied. Sub-physical resource block (sub-PRB) frequency allocations may be provided for uplink transmissions. The UE may account for the allocated quantity of sub-carriers when determining the quantity of information bits. To indicate a sub-PRB, the UE may be configured to reinterpret one or more fields of an existing downlink control information (DCI) format as indicating the allocated sub-carriers, or a new DCI format may be configured that includes fields for indicating a sub-PRB allocation.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine, when using resource spread multiple access with non-orthogonal multiple access, that a particular modulation scheme is enabled. The user equipment may process symbols using a set of processing sequences selected based at least in part on the particular modulation scheme such that the particular modulation scheme is preserved for the symbols. The user equipment may transmit the symbols based at least in part on processing the symbols using the set of processing sequences. Numerous other aspects are provided.

To reduce the possibility of a collision between different DMRSs in generating the DMRSs for multiplexing with content of message type A (msgA) using a demodulation reference signal (DMRS) scrambling identifier.SOLUTION: User equipment (UE) receives, from a base station (BS), information for identifying a quantity of DMRS sequences supported per antenna panel of the BS. The UE transmits a DMRS communication having one or more DMRS sequences configured based at least in part on the quantity of DMRS sequences supported per antenna panel and scrambled using an extended DMRS scrambling identifier that is based at least in part on a physical random access channel preamble.SELECTED DRAWING: Figure 6

A data transmission method and a communication apparatus are provided. The data transmission method includes: A terminal device and a network device each determine a first sequence number of the terminal device on a first time-frequency resource, and determine, from a signature sequence set, a first signature sequence corresponding to the first sequence number, where a difference between quantities of sequence numbers corresponding to any two signature sequences in the signature sequence set is less than or equal to a first value, and sequence numbers corresponding to any two signature sequences in the signature sequence set are different. The terminal device sends data on the first time-frequency resource by using the first signature sequence. Correspondingly, the network device receives the data on the first time-frequency resource. The network device decodes the data based on the first signature sequence. According to embodiments of this application, a centralized collision of signature sequences can be avoided, and a degree of distinguishing between terminal devices by using the signature sequences can be improved.

Disclosed is a method for transmitting and receiving a channel state information (CSI)-reference signal (RS) in a wireless communication system.Specifically, the method performed by a base station may include: configuring control information indicating that an antenna port for all CSI-RS resources included in a CSI-RS resource set is same, wherein the CSI-RS resource set is used for tracking at least one of a time or a frequency; transmitting the configured control information to a user equipment (UE); and transmitting the CSI-RS to the UE through all the CSI-RS resources.In doing so, the UE is capable of performing time / frequency tracking more precisely.

This application provides a communication method, a communication device, a computer-readable storage medium, a chip, and a computer program product. The communication method includes: determining a first matrix based on a quantity of active terminal devices in a plurality of terminal devices or a quantity of the plurality of terminal devices. The communication method further includes: determining a first sequence based on the first matrix, a probability distribution of to-be-sent data of the plurality of terminal devices, and a predetermined length of the first sequence associated with the plurality of terminal devices. The communication method further includes: performing spreading on modulated data by using the first sequence. The communication method includes: sending spread modulated data to a network device. In the method, sparseness of the active terminal device is used, so that channel decoding complexity can be reduced in a scenario in which the quantity of potential terminal devices is large and the quantity of active terminal devices is small.

Provided is a transmission control method for a plurality of transmitting stations which are connected to a wireless communication partner receiving station by non-orthogonal multiple access, and each of which is capable of transmitting a same signal to the receiving station by repetition for a predetermined number of times at a predetermined cycle, wherein an information processing apparatus executes: acquiring information indicating a code word length for each of the plurality of transmitting stations to use for the repetition; and assigning, to each of the plurality of transmitting stations, transmitting power for ensuring a power difference which is required between transmitting stations, so that the shorter the code word length the higher the receiving power at the receiving station.

Sequence selection techniques for Non-Orthogonal Multiple Access (NOMA) are provided. A User Equipment (UE) sends a request to a base station, the request indicating that the UE is to conduct at least one uplink transmission. The UE receives, in response to the request, an indicator of an expected system load, a value of the indicator including a total number of sequences expected to be used at one time for uplink transmissions in the system. The UE detects that at least two different pairs of sequences in a configured set of sequences have different cross correlation values, the sequences in the set configured for scrambling uplink transmissions. The UE selects, in response to the detecting and based on the indicator, at least one sequence with an improved cross correlation with at least one other sequence the at least one sequence and the at least one other sequence to be used for scrambling uplink transmissions within the system.

The disclosure relates to a method and apparatus for transmitting and receiving a signal in a wireless communication system. An operation method of a terminal in a wireless communication system includes receiving, from a base station, information related to a position of a symbol in which a synchronization signal block is transmitted in a time domain, determining whether a position of a symbol configured to transmit an uplink signal overlaps with the position of the symbol in which the synchronization signal block is transmitted in the time domain, in a case where the position of the symbol configured to transmit the uplink signal overlaps with the position of the symbol in which the synchronization signal block is transmitted in the time domain, determining whether a time or frequency division duplex (XDD) related indicator is configured or received, and transmitting, to the base station, the uplink signal based on a result of the determination of whether the XDD related indicator is configured or received.

The present invention relates to a communication technology in which an IoT technology is combined with a 5G communication system that supports a higher data transmission rate than a 4G system, and a system therefor. The present disclosure may be applied to intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety-related services, etc.) based on the 5G communication technology and the IoT-related technology. The invention of the present disclosure proposes a method and apparatus for transmitting and receiving a reference signal for efficiently using a resource in a wireless communication system.

The present disclosure relates to a communication technique that merges IoT technology with a 5G communication system for supporting higher data transmission rates than 4G systems, and a system therefor. The present disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail business, security and safety-related services, etc.) on the basis of 5G communication technology and IoT-related technology. The invention of the present disclosure proposes a method and device for transmitting and receiving a reference signal for efficiently using resources in a wireless communication system.

Certain aspects of the present disclosure provide techniques for demodulation reference signal (DMRS) sequence selection. One aspect provides a method for wireless communications by a first wireless node. The method generally includes selecting a type of DMRS sequence to use for communications with a second wireless node based on a signal quality associated with the communications, receiving a message having the type of DMRS sequence, and performing channel estimation based on the DMRS sequence using the message.

To enable identification of the transmitting station from the received signal. [Solution] The transmitting station identification signal generation device 10 includes a PRBS generation unit (111) that generates a PRBS signal using an M sequence, a cyclic shift unit (112) that generates a cyclic shift signal by cyclically shifting the PRBS signal based on a transmitting station identification code assigned to the transmitting station, a subcarrier modulation unit (113) that generates a data carrier by phase shift modulation of the cyclic shift signal, and a signal generation unit (114, 115, 116) that generates a transmitting station identification signal by inserting a null carrier into the data carrier and performing OFDM modulation.