84results about "Multiplex code allocation" patented technology

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.

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.

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.

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.

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.

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.

A terminal according to an aspect of the present disclosure includes a receiving section that receives information associated with one frequency domain orthogonal cover code (FD-OCC) from among a first FD-OCC having a length of 2 and a second FD-OCC longer than 2, and a control section that applies, based on the information, the FD-OCC to a demodulation reference signal (DMRS) of a shared channel. According to an aspect of the present disclosure, it is possible to use an appropriate number of DMRS ports.

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may consider applying orthogonal coverage coding (OCC) to an uplink transmission when determining a transport block size (TBS) for the uplink transmission. The OCC may be used to multiplex transmissions from multiple UEs and may relate to extension information. The described techniques may involve considering an extension of information bits in determining a TBS for an uplink transmission to which OCC is applied. A sub-physical resource block (sub-PRB) frequency allocation may be provided for uplink transmissions. The UE may account for the number of allocated subcarriers in determining the number of information bits. To indicate the sub-PRB, the UE may be configured to re-interpret one or more fields of an existing downlink control information (DCI) format as indicating the allocated sub-carrier, or may configure a new DCI format including a field for indicating the sub-PRB allocation.

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives downlink control information for scheduling at least one of a downlink shared channel and an uplink shared channel together with a demodulation reference signal (DMRS) to which a length-4 frequency-domain orthogonal cover code (FD-OCC) is applied; and a control unit that controls reception of the downlink shared channel and transmission of the uplink shared channel. The terminal supports the application of different FD-OCC codes to a DMRS for the downlink shared channel and a DMRS for the uplink shared channel.

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.

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.

In a wireless communication system, including transmitter entities, digitally controllable scattering (DCS) entities, a receiver entity, and a control entity, the receiver entity can identify, by respectively transmitting or scattering a signal, which of the transmitter entities and which of the DCS entities contributed to a receive signal received at the receiver entity over one or more direct links and / or one or more indirect links. The identification by the receiver entity is based on the use of Zadoff-Chu (ZC) identities determining ZC sequences, where unique ZC identities are used at the transmitter entities for transmitting signals and at the DCS entities for scattering impinging signals.

A wireless device is configured to produce a signal in a time slot of a frame, wherein the time slots have variable lengths. The signal having a first portion and a second portion, wherein the first portion and the second portion are located in defined time regions in the slot. Further, the first portion having data and a multiplexed first pilot, wherein the multiplexed first pilot is derived from a pseudo random sequence, the second portion having a pilot sequence and a cyclic prefix. The wireless device transmits the produced signal in the time slot.

Provided is a sequence allocation method capable of reducing inter-cell interference of a reference signal when a ZC sequence is used as the reference signal in a mobile communication system. In the sequence allocation method, R×M sequences specified by a ZC sequence number r (r=1 to R) and a cyclic shift sequence number m (m=1 to M) are divided into a plurality of sequence groups X (X=1 to R) in accordance with the transmission band width of the reference signal, so that the ZC sequence is allocated to each cell in each sequence group unit. When it is assumed that R=9 and M=6, the number of sequences is 54. Each of the sequence groups is formed by two sequences. Accordingly, the number of sequence groups is 27. The 27 types of sequence groups are allocated to each cell.

A method may include sending a contention resolution message for a random access procedure from a user equipment (UE) through a physical uplink channel in a wireless communication network, and sending a repetition of the contention resolution message from the UE through the physical uplink channel. The physical uplink channel may include a physical uplink shared channel (PUSCH). The method may further include selecting a preamble from a first preamble group corresponding to a capability of the UE to send the repetition of the contention resolution message, and sending the preamble from the UE. Selecting the preamble from the first preamble group may include selecting a preamble from a first preamble sub-group corresponding to the capability of the UE to send the repetition of the contention resolution message.

An example wireless communication method includes transmitting, by a network device to a communication device, a message including a first value indicating a first set of demodulation reference signal (DMRS) ports, where a total number of DMRS ports in the first set of DMRS ports is greater than or equal to two; a transmission over a single carrier and a first set of DMRS ports is received by a network device from a communication device.

In the multiple short sequence based SRS, multiple items of sequence data having a short sequence length corresponding to a partial band are used for transmitting SRS in discontinuous bands. In the multiple short sequence based SRS, a terminal specifies a frequency domain to be used for transmitting a reference signal using predetermined sequence data, applies a phase shift index associated with the specified frequency domain to the reference signal, and transmits the reference signal to which the phase shift index is applied by using the specified frequency domain.

The invention provides a reference signal parameter standardization configuration method and a network equipment mutual detection method, and relates to the technical field of wireless mobile communication, in particular to the technical field of atmospheric waveguide interference and detection. The method comprises the following steps: firstly, based on acquired setting parameters of remote interference management reference signals (RIM-RS) of different manufacturers and network equipment mutual inspection requirements among the different manufacturers, determining to-be-standardized parameters of the RIM-RS and protocol versions and protocol constraints used for standardization configuration, and then, based on the mutual inspection requirements, the protocol versions and the protocol constraints, determining the to-be-standardized parameters of the RIM-RS and the protocol versions and the protocol constraints used for standardization configuration. And generating configuration parameters corresponding to the to-be-standardized parameters, and finally sending the configuration parameters to network devices of different manufacturers. Therefore, the parameters of the RIM-RS are subjected to standardized and unified configuration through mutual detection requirements of network equipment of different manufacturers and protocol versions and protocol constraints, so that the network equipment of different manufacturers can be ensured to accurately identify and detect mutual signals, and conditions are provided for realizing accurate and reliable detection and identification among the network equipment of cross manufacturers.

Example embodiments of the present disclosure are directed to orthogonal cover code (OCC) with global navigation satellite system (GNSS) fix. A method comprises receiving a configuration indicating that an OCC operation is allowed to be partially kept under a GNSS based TA update occurring within an OCC time window; and performing a full OCC uplink transmission or a partial OCC uplink transmission based on the configuration.

A first apparatus which receives a configuration indicating an orthogonal cover code, OCC, operation is allowed to be partially kept under a global navigation satellite system, GNSS, based timing adva

Embodiments of the present disclosure relate to a method for transmitting a waveform. The method comprising generating, by a transmitter, an orthogonal time frequency division multiplexing (OTFDM) waveform corresponding to an input bit sequence, wherein said input bit sequence is uniquely mapped to one of the plurality of OTFDM waveforms. Also, the method comprises transmitting the OTFDM waveform corresponding to the input bit sequence. Embodiments of the present disclosure also relates to method of receiving OTFDM waveforms.

An exemplary communication device which is a master communication device installed in an automobile for performing communication using a plurality of slave communication devices installed in the automobile and a preamble. The master communication device selects, from unique preamble codes each of which is stored in association with an installation position in the automobile for each slave communication device, a preamble code to be used for communication with the slave communication device that is to be a communication partner, and performs communication with the slave communication device by using the preamble signal of the selected preamble code.

Apparatuses, methods, apparatus, and computer-readable media for orthogonal cover code (OCC) operation are disclosed. An example apparatus for a terminal device with inter-slot OCC capability may include at least one processor and at least one memory. The at least one memory may store instructions that, when executed by the at least one processor, cause the apparatus to at least: determine an actual OCC window, the actual OCC window being an integer multiple of an OCC period; receiving scheduling information for a plurality of physical uplink shared channel (PUSCH) repetitions from the network device; and transmitting a plurality of PUSCH repetitions according to the determined actual OCC window and the scheduling information, in which the PUSCH repetitions within the determined actual OCC window have the same payload, maintaining phase continuity and power consistency.

The present disclosure provides a backscatter communication method and apparatus, and a storage medium. The backscatter communication method comprises: obtaining a first sequence, wherein the first sequence comprises at least one zero element and / or at least one non-zero element; and performing backscatter communication on the basis of the first sequence.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration of a feedback resource associated with a sidelink feedback channel, wherein the feedback resource is associated with an eight-level code division multiplexing (CDM) scheme. The UE may transmit a feedback communication associated with a sidelink data communication using the feedback resource, wherein transmitting the feedback communication is based at least in part on using the eight-level CDM scheme to generate the feedback communication. Numerous other aspects are described.

The present disclosure is for applying an orthogonal covering code to a non-terrestrial network uplink channel in a wireless communication system, and an operation method of a terminal may comprise: receiving downlink control information (DCI) including an uplink (UL)-grant; generating at least one UL transport block (TB); applying an orthogonal covering code (OCC) to signals included in a plurality of slots including symbols including the at least one UL TB; and transmitting the signals.

A spreading sequence is determined (S301) based on a candidate of a control channel of a control resource set, the candidate comprising a sequence of control information. The sequence of control information and the determined spreading sequence are multiplied (S303), thereby obtaining a spread series of control information.