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105 results about "Covering code" patented technology

In coding theory, a covering code is a set of elements (called codewords) in a space, with the property that every element of the space is within a fixed distance of some codeword.

Transmission of uplink control signals in a communication system

A method and apparatus of a User Equipment (UE) to simultaneously transmit information of a first type and information of a second type over a number of transmission symbols, the information of the first type and the information of the second type being respectively associated with a first Orthogonal Cover Code (OCC) and a second OCC, wherein a length of each OCC is equal to the number of transmission symbols. The method includes multiplying, at each transmission symbol, the information of the first type with a respective element of the first OCC to obtain a first output; multiplying, at each transmission symbol, the information of the second type with a respective element of the second OCC to obtain a second output; summing the first output and the second output to obtain a combined output; and transmitting the combined output.
Owner:SAMSUNG ELECTRONICS CO LTD

Method and system for indicating uplink demodulation reference signal

InactiveCN101882980ASolve the problem that the requirements for uplink multi-antenna port transmission cannot be metMulti-frequency code systemsPilot signal allocationComputer scienceUser equipment
The invention provides a method and a system for indicating an uplink demodulation reference signal. The method comprises the following steps: a base station sends indication information to user equipment, wherein the indication information indicates at least one of the cyclic shift, the orthogonal cover code and the sequence hopping / sequence group hopping (SGH) mode of the demodulation reference signal; and the user equipment sends data and the demodulation reference signal to the base station according to the orthogonal cover code of the demodulation reference signal. The invention can indicate the parameters of the demodulation reference signal so as to meet the requirements of uplink multi-antenna port transmission.
Owner:深圳市恒程汇文化科技有限公司

Method and apparatus for transmitting and receiving demodulation reference signal

Methods, apparatuses, and systems described herein generally relate to a reference signal generation and mapping. For example, a method comprises determining a first set of antenna ports for a demodulation reference signal (DM-RS) transmission; determining, based on the first set, a frequency index associated with four adjacent resource elements, wherein the four adjacent resource elements correspond to two adjacent symbols in a time axis and to two adjacent subcarriers in a frequency axis; generating, based on a first orthogonal cover code and a second orthogonal cover code, a DM-RS associated with the first set of antenna ports; and transmitting, via a mapping to the four adjacent resource elements, the DM-RS associated with the first set of antenna ports.
Owner:INNOVATIVE TECH LAB CO LTD

Method and device for generating pilot frequency sequence

The invention discloses a method for generating a pilot frequency sequence. The method comprises the following steps of: selecting OCCs (Orthogonal Cover Code) from an OCC set according to different rules in each code division and frequency division and / or time division hybrid multiplexing demodulation reference signal (DMRS) port by using different code division multiplexing groups and / or generating scrambling sequences of the DMRS according to different rules by using different code division multiplexing groups; and multiplying the selected OCCs with the scrambling sequences to generate a final pilot frequency sequence of each DMRS port. The invention further discloses a device for generating a pilot frequency sequence. By adopting the method and the device, corresponding layers among different code division multiplexing port groups can be lowered, the influence of inter-carrier interference caused by the problems of Doppler frequency shift and timing error on channel estimation is reduced, and the channel estimation accuracy is increased.
Owner:ZTE CORP

Method and device for transmitting reference signal in wireless communication system

Disclosed are a method and device for transmitting a reference signal in a wireless communication system. A base station: maps each demodulation reference signal (DMRS) of each of a plurality of layers into a first resource element (RE) set and a second resource element set including four resource elements over four orthogonal frequency division multiplexing (OFDM) symbols within a subframe; allocates first orthogonal cover codes (OCCs) having a length of 4 to each DMRS mapped into said first resource element set; allocates second OCCs having a length of 4 to each DMRS mapped into said second resource element set; and transmits each DMRS mapped into said first resource element set and said second resource element set. Said subframe includes two slots, and each slot includes six OFDM symbols. Said second OCC are formed by respectively swapping positions of bits that constitute said first OCCs.
Owner:LG ELECTRONICS INC

Resource assignments for uplink control channel

A wireless communication method includes allocating physical uplink control channel (PUCCH) data in first slot to a first orthogonal cover code (OCC). The method also includes allocating PUCCH data in a second slot of the same subframe to a different orthogonal cover code (OCC). Another method includes mapping PUCCH resources to physical resource blocks based on a user equipment (UE) specific signaling parameter (e.g., a resource index) and a number of symbols in a slot of a subframe.
Owner:QUALCOMM INC

DMRS (demodulation reference signal) indication method, system, base station and user equipment

The present invention discloses a DMRS (demodulation reference signal) indication method. The method includes the following steps that: designated DMRS ports, layers and orthogonal cover code (OCC) lengths are assigned to user equipment (UE) according to a DMRS configuration parameter indication table; various kinds of DMRS configuration parameter indication entries of various kinds of OCC length combinations containing at least two OCC lengths are recorded in the DMRS configuration parameter indication table; and corresponding DMRS indication information is generated according to the DMRS configuration parameter information assigned to the UE, and the corresponding DMRS indication information is sent to the UE. The present invention also discloses a base station, UE (user equipment) and a DMRS (demodulation reference signal) indication system.
Owner:CHINA MOBILE COMM GRP CO LTD

Method and user equipment for transmitting pucch when more than five cells are used according to carrier aggregation

Provided in one disclosure of the present specification provides a method for transmitting a physical uplink control channel (PUCCH) including uplink control information (UCI), when more than five cells are used by a user equipment (UE) according to carrier aggregation. The method may comprise the steps of: encoding UCI of K bits, which exceeds 20 bits, and outputting encoded bits of N bits; and mapping on resource elements (RE) in an uplink subframe, without applying an orthogonal cover code (OCC) to the encoded N bits, wherein the uplink subframe may include two symbols, and wherein each symbol may include 12 subcarriers on a frequency axis and six or seven symbols on a time axis. The mapping step may be carried out according to a symbol index and from among symbols remaining after excluding symbols for a demodulation reference signal (DMRS) and a subcarrier index.
Owner:LG ELECTRONICS INC

Method and apparatus for transmitting a reference signal in a multi-antenna system

ActiveUS20120250656A1Channel estimation performance can be guaranteedGuaranteed performanceModulated-carrier systemsSignal allocationControl channelComputer science
Provided are a method and apparatus for transmitting a reference signal in a multi-antenna system. A terminal generates a plurality of reference signal sequences in which cyclic shift values that are different from each other are allocated to the respective plurality of layers, and generates an orthogonal frequency division multiplexing (SC-FDMA) symbol to which the plurality of reference signal sequences are mapped. The SC-FDMA symbol is transmitted to a base station via a plurality of antennas. Each of the reference signal sequences is multiplied by either +1 or −1 in accordance with an orthogonal covering code (OCC) index corresponding to the cyclic shift field in a DCI format transmitted via a physical downlink control channel (PDCCH) for each layer.
Owner:LG ELECTRONICS INC

Dynamic symbolic execution method and device thereof based on overall situation super block dominator graph

The invention provides a dynamic symbolic execution method and a device of the dynamic symbolic execution method based on an overall situation super block dominator graph and belongs to the field of computer software testing and software security. The method is as follows: a control flow diagram of a tested executable program is obtained, and the control flow diagram is transformed to a super block dominator graph according to relevant theories of a dominance relation. Each nodal point in the super block dominator graph is marked with 'weight' which is updated before symbolic execution at each time, and the 'weight' indicates the least number of basic blocks which can be covered when the nodal point is executed. When one dynamic symbolic execution is over, the nodal point with the largest 'weight' value is selected from the super block dominator graph, and corresponding forecasting path constraint conditions are generated, and then a new testing use case is generated by solving of a solver, so that the next execution is driven. Compared with the prior art, the dynamic symbolic execution method and the device of the dynamic symbolic execution method based on the overall situation super block dominator graph are capable of covering code blocks as many as possible with least testing use cases, so that the growth rate of the code coverage rate is effectively accelerated, and the problem of path explosion is relieved. The dynamic symbolic execution method and the device of the dynamic symbolic execution method based on the overall situation super block dominator graph is of great importance for the performance of testing large-scale utility software of the dynamic symbolic execution.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Resource allocation method and related device for dedicated demodulation reference signal

The embodiment of the invention discloses a resource allocation method of a dedicated demodulation reference signal and a relevant device, wherein the resource allocation method of the dedicated demodulation reference signal comprises the steps of: determining number of transmission layers on which UE (User Equipment) transmits uplink data; according to the determined number of the transmission layers, selecting to generate a combination allocation of CS (Cyclic Shift) and OCC (Orthogonal Cover Code) sequence resources required to be adopted by DMRS (Demodulation Reference Signals) of all transmission layers on which the UE transmits the uplink data from one combination allocation item of a plurality of preset combination allocation items of the CS and OCC sequence resources adopted by the DMRS sequences of all transmission layers and set aiming at the number of the maximum transmission layers supported by a system; and generating and sending a control signaling including allocation indication information to the UE. According to the scheme of the embodiment of the invention, the complexity of describing the DMRS resource allocation by a protocol can be simplified, and the DMRS interference among codons is favorably improved.
Owner:HUAWEI TECH CO LTD

Method of scrambling reference signals, device and user equipment using the method

A Method of scrambling reference signals, device and user equipment using the method are provided. In the method, a plurality of layers of reference signals assigned on predetermined radio resource of a plurality of layers of resource blocks with the same time and frequency resources are scrambled, the method comprising: an orthogonalizing step of multiplying each layer of reference signal selectively by one of a plurality of orthogonal cover codes (OCCs) with the same length wherein the OCC multiplied to a first layer of reference signal can be configured as different from those multiplied to other layers of reference signals; and a scrambling step of multiplying all of symbols obtained from the OCC multiplied to each of the other layers of reference signals by a symbol-common scrambling sequence wherein the symbol-common scrambling sequences can be different from each other for reference signals multiplied by the same OCC.
Owner:SUN PATENT TRUST

Methods, apparatuses, system, and related computer program product for resource allocation

Embodiments provide a method and apparatus wherein respective demodulation reference signals, DM RS, of a user bandwidth can be cyclically shifted with respect to each other. An uplink scheduling grant may comprise an index for DM RS resource having a cyclic shift and an orthogonal cover code or interleaved frequency division multiple comb wherein a usage orthogonal cover or interleaved frequency division multiple comb may configured using radio resource control message. A usage orthogonal cover or interleaved frequency division multiple comb may optionally be tied statically into DM RS resources. At least some of respective demodulation reference signals of the at least two user bandwidths may be mutually orthogonal.
Owner:CELLULAR COMM EQUIP LLC

Transmission method for demodulation reference signal of physical uplink shared channel and user equipment (UE)

ActiveCN103312399ASolve the problem of not being able to decode correctlyAvoid collisionSpatial transmit diversityWireless communicationCell specificResource utilization
The invention discloses a transmission method for a demodulation reference signal of a physical uplink shared channel and user equipment (UE). The method comprises the following steps that the UE receives signaling configuration information for the UE to determine the demodulation reference signal of the physical uplink shared channel; and the UE determines the demodulation reference signal of the physical uplink shared channel by using the signaling configuration information, and transmits the demodulation reference signal, wherein the signaling configuration information comprises at least one of parameters of UE-specific sequence group number offset, a UE-specific cell identification number, UE-specific cell identification offset, UE-specific sequence group pattern offset, UE-specific sequence shift pattern offset and UE-specific or cell-specific CS (cyclic shift) hopping-enabled signaling. According to the scheme, the problem that an OCC (orthogonal cover code) cannot be accurately decoded due to inconsistent CS hopping patterns and the problem of collision of a UE-specific sequence and a cell-specific sequence can be effectively solved, so that the performance of a CoMP (coordinated multiple point) system is improved, and the resource utilization rate of the CoMP system is increased.
Owner:ZTE CORP

Special order book production system

A method of book production wherein a customer sends a computer file of a book to a producer whose computer book production program restructures the text and cover data to fit a standard / preferred size accommodated by the producer's book binding system. The program then calculates the spine dimensions, and this is sent to the customer for determining a layout and content for printing on the spine. The layout is sent to the producer who inserts it into the book production program with a job identification spine code. The producer inserts a code in the cover data identifying the corresponding text and spine. At the beginning of each day / production run, the producer simply enters the covers in the desired order into the production program. The program reads the cover code, which identifies the corresponding stack and spine and directs the printing and binding accordingly.
Owner:CAFEPRESS COM

Method for transmitting and receiving uplink control information in mobile communication system, and apparatus for the same

An operation method of a terminal for transmitting uplink control information (UCI) to a base station by multiplexing two or more UCIs in a single physical uplink control channel (PUCCH) includes: determining a first sequence corresponding to a value of a second UCI (UCI2) when the UCI2 is generated before completing transmission of a first UCI (UCI1) to the base station; modulating the first sequence by applying a modulation symbol corresponding to a value of the UCI1, and applying a orthogonal cover code (OCC) to the modulated first sequence to generate a second sequence; and transmitting the second sequence in at least one symbol position of symbols constituting the PUCCH.
Owner:ELECTRONICS & TELECOMM RES INST

Resource configuration method and relevant device special for demodulation reference signal (DMRS)

The embodiment of the invention discloses a resource configuration method and a relevant device special for a demodulation reference signal (DMRS). According to one embodiment, the method can comprise the following steps of: determining the number of transmission layers on which user equipment (UE) transmits uplink data; according to the determined number of the transmission layers, selecting a combined configuration item of cyclic shift (CS) and orthogonal cover code (OCC) sequence resources required to be adopted by DMRS sequences for generating the transmission layers on which the UE transmits the uplink data from a plurality of preset combined configuration items, which are set aiming at the maximum transmission layer number supported by a system, of the CS and OCC sequence resources which can be adopted by the DMRS sequences for generating the transmission layers on which the UE transmits the uplink data; and generating and issuing a control signal involving configuration instruction information. By the technical scheme, the complexity of describing DMRS resource configuration in a protocol can be reduced, and DMRS interference among code words can be avoided.
Owner:HUAWEI TECH CO LTD

Orthogonal cover code indication and demodulation reference signal processing methods, system and equipment

The embodiment of the invention discloses an orthogonal cover code (OCC) indication method, a demodulation reference signal (DMRS) processing method, a system and equipment, which relate to the field of wireless communication and are used for solving the technical problem that user equipment in the prior art cannot determine whether to use an OCC sequence or not and determine which OCC sequence to perform weighting processing on a DMRS. The OCC indication method comprises the following steps of: determining whether the user equipment (UE) is required to use the OCC sequence for performing the weighting processing on the DMRS to be transmitted or not by using a network side, determining the OCC sequence used for performing the weighting processing on the DMRS by the UE and transmitting the information of the OCC sequence to the UE if the UE is required to use the OCC sequence for performing the weighting processing on the DMRS to be transmitted, otherwise, transmitting the information indicating that the UE is not required to use the OCC sequence for performing the weighting processing on the DMRS to the UE. By the methods, the user equipment can determine whether to use the OCC sequence or not and determine which OCC sequence to perform the weighting processing on the DMRS according to the indication of the network side.
Owner:DATANG MOBILE COMM EQUIP CO LTD

Method and system for automatic creation of touring tests

ActiveUS20180121331A1Software testing/debuggingExploratory testingSoftware development
The disclosure provides an approach for automatically analyzing data related to software development, such as the number of defects, number of code line changes, number of test cases covering code, etc., and creating exploratory tests based on tour templates. In one embodiment, a test generating application matches descriptions, tags and / or keywords in the tour templates with data from development tools used to develop and test software. The test generating application combines the tour templates with the matching data to create exploratory tests for testers to perform. In addition, the test generating application may rank the created tests based on a measure of importance and determine a number of highest ranking tests or test types that can be executed given a capacity of the software tester or testing team. The highest ranking tests may then be provided to the software tester or testing team to perform prior to the software's release.
Owner:IBM CORP

Method and user equipment for transmitting pucch when more than five cells are used according to carrier aggregation

Provided in one disclosure of the present specification provides a method for transmitting a physical uplink control channel (PUCCH) including uplink control information (UCI), when more than five cells are used by a user equipment (UE) according to carrier aggregation. The method may comprise the steps of: encoding UCI of K bits, which exceeds 20 bits, and outputting encoded bits of N bits; and mapping on resource elements (RE) in an uplink subframe, without applying an orthogonal cover code (OCC) to the encoded N bits, wherein the uplink subframe may include two symbols, and wherein each symbol may include 12 subcarriers on a frequency axis and six or seven symbols on a time axis. The mapping step may be carried out according to a symbol index and from among symbols remaining after excluding symbols for a demodulation reference signal (DMRS) and a subcarrier index.
Owner:LG ELECTRONICS INC

Method and system for transmitting uplink demodulation reference signal

The invention provides a method and a system for transmitting an uplink demodulation reference signal (DMRS). The method comprises the steps of acquiring a transmitting position of the uplink DMRS, and determining an OCC (orthogonal covering code) relevant to the uplink DMRS according to network-side OCC indicating information; and transmitting the uplink DMRS according to the transmitting position and the OCC.
Owner:ZTE CORP

Method for transmitting uplink control channel in wireless communication system and apparatus for same

Disclosed are a method for transmitting an uplink control channel in a wireless communication system and an apparatus for the same. Particularly, the method comprises the steps of: receiving allocation of a resource region including one or more symbols for transmission of an uplink control channel; and mapping uplink control information and a reference signal to each specific resource group unit in the allocated resource region, wherein the specific resource group unit may comprise a first resource element having the reference signal mapped thereto and second resource elements having the at least one piece of uplink control information mapped thereto, the second resource elements may be arranged adjacent to the first resource element, and the second resource elements may be multiplexed according to orthogonal cover codes in a clockwise or counter-clockwise direction.
Owner:LG ELECTRONICS INC
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