21 results about "Puncturing" patented technology

Systems and methods are disclosed that are related to puncturing of Control Resource Set (CORESET) #0, e.g., for operation in a narrow channel bandwidth. In one embodiment, a method performed by a User Equipment (UE) comprises operating in a wireless spectrum allocation that is smaller than an amount of frequency domain resources needed for receiving a Synchronization Signal (SS) / Physical Broadcast Channel (PBCH) block (SSB) and CORESET #0. The method further comprises receiving, from a network node, an SSB and CORESET #0 after puncturing, wherein puncturing of the SSB is determined by a number of resource blocks (RBs) comprised in the wireless spectrum allocation within a respective frequency band and puncturing of a Physical Downlink Control Channel (PDCCH) mapped to the CORESET #0 is determined by the puncturing of the SSB and one or more offset parameters. The method further comprises decoding a message based on the PBCH / PDCCH.

Embodiments of the present disclosure relate to controlling a control resource set (CORESET) #0 puncturing. Some embodiments comprise determining, at a first apparatus, based at least on detection of a synchronization signal block, received from a second apparatus, on a specific frequency location, whether a CORESET of a specific type is punctured, wherein a portion of resources punctured in the CORESET of the specific type are incapable of carrying downlink control information; in accordance with a determination that the CORESET of the specific type is punctured, obtaining a CORESET puncturing pattern; and determining the portion of resources punctured in the CORESET at least based on the CORESET puncturing pattern. Furthermore, the method comprises indicating, from a second apparatus to a first apparatus, that a CORESET of a specific type is punctured by transmitting a synchronization signal block on a specific frequency location.

Proposed are a method and device for receiving an A-PPDU in a wireless LAN system. Specifically, a reception STA receives an A-PPDU from a transmission STA and decodes the A-PPDU. The A-PPDU includes a first PPDU for a primary 160 MHz channel and a second PPDU for a secondary 160 MHz channel. A first signal field includes information about a bandwidth in which the first PPDU is transmitted. The information about the bandwidth in which the first PPDU is transmitted includes information about a first preamble puncturing pattern punctured in a unit of a 20 MHz channel in the primary 160 MHz channel. A second signal field includes information about a second preamble puncturing pattern.

Embodiments of the present disclosure relate to an apparatus, a method, and a computer readable storage medium for controlling a control resource set (CORESET) # 0 puncturing. The method includes determining, at a first device, whether a particular type of CORESET is punctured based on detecting a synchronization signal block received from a second device at least on a particular frequency location, where a punctured resource portion in the particular type of CORESET cannot carry downlink control information; according to the fact that the CORESET of the specific type is punched, a CORESET punching pattern is obtained; and determining a punctured resource portion in the CORESET based at least on the CORESET puncturing pattern. Further, the method includes indicating from the second device to the first device that the particular type of CORESET is punctured by transmitting a synchronization signal block on the particular frequency location.

Embodiments of the present invention are drawn to systems, apparatus and methods that perform wireless ranging procedures using EHT frames supporting large bandwidth transmission. Moreover, ranging specifications are expanded for the EHT frame format in order to support BW320 ranging with improved performance and accuracy. Embodiments of the present invention support high-bandwidth BW320 and BW240 wireless ranging using a EHT frame format and support 802.11az ranging using a high efficiency (HE) for 802.11be devices. Long training field (LTF) repetition features and security features are also described for EHT-LTFs, and signaling of preamble puncturing patterns are defined for 320 MHz physical layer protocol data units (PPDUs) carried in the U-SIG field and in Trigger Frames to improve spectrum efficiency and reduce interference, according to embodiments.

Provided in the present application are a data transmission method and apparatus. The method comprises: performing outer code coding on one or more coding units, so as to obtain first redundant data; and sending the first redundant data on a first resource, wherein the first resource is predefined, or, the first resource is configured by an access network device. A resource used for carrying redundant data obtained by means of outer code coding is predefined, or, an access network device separately configures the resource for the redundant data, and in this way, a first communication apparatus can map the redundant data to the given resource for transmission, such that the redundant data has a clear resource boundary, thereby reducing the influence on original information in some scenarios. In addition, the redundant data is mapped to the given resource for transmission, thereby facilitating the use of the redundant characteristics of the redundant data to perform multiplexing, puncturing, interference resistance, etc. on the resource occupied by the redundant data, thus improving the spectrum utilization rate.

The present disclosure relates to a technology for solving a problem in which signal transmission / reception performance of a WLAN system is degraded due to interference occurring in an OBSS and AP dense environment. In the conventional pilot structure, it is difficult to sufficiently measure various interference effects, resulting in performance degradation. One embodiment of the present disclosure proposes a method for defining an interference measurement (IM) pilot for precisely identifying interference characteristics, and transmitting same by including same in a PPDU together with data. The PPDU may have a bandwidth of 80 MHz, 160 MHz, 320 MHz, or the like, and a structure to which preamble puncturing is applied may be included as necessary. In addition, interference measurement accuracy is improved by configuring an IM pilot tone plan for each bandwidth and arranging an IM pilot at a position that does not overlap a conventional CFO pilot. According to the technology of the present disclosure, a receiving end can improve transmission reliability and throughput by improving channel estimation and interference cancellation performance using IM pilot-based interference information.

A method has the step of: transmitting or receiving a signal using a first resource unit (RU) in an orthogonal frequency-division multiple access (OFDMA) physical layer protocol data unit (PPDU). The first RU is selected from multiple first RUs of a first tone plan for the PPDU, which are same as second RUs of a second tone plan obtained by a tone-distribution method have the steps of: partitioning the PPDU into multiple subchannels, determining a third tone plan having third RUs, the tone indices of the third tone plan being greater than or equal to zero, and modifying tone indices of the third tone plan such that the modified tone indices thereof have negative and positive indices excluding a plurality of direct current (DC) tones at and around index zero, to obtain multiple modified third RUs as part of the second RUs for at least a first subchannel.

One coding scheme is selected from a plurality of coding schemes, an information sequence is encoded by using the selected coding scheme, and an obtained encoded sequence is modulated to obtain a modulated signal. The obtained modulated signal is subjected to a phase change and is transmitted. The plurality of coding schemes include at least a first coding scheme and a second coding scheme. The first coding scheme is a coding scheme with a first coding rate for forming a generated first codeword as a first encoded sequence by using a first parity check matrix. The second coding scheme is a coding scheme with a second coding rate obtained after puncturing processing, for generating a second encoded sequence by performing the puncturing processing on a generated second codeword by using a second parity check matrix different from the first parity check matrix. The number of bits of the first encoded sequence is equal to the number of bits of the second encoded sequence.

Various aspects of the present disclosure generally relate to wireless communication. For example, when an output from a systematic polar encoder has a coded bit length N that differs from a target code length E, locations for bit freezing may be selected such that a resulting set of information bit locations (including cyclic redundancy code (CRC) bit locations) satisfy a systematic encoding condition. Furthermore, when the coded bit length N exceeds the target code length E, such that shortening or puncturing is performed to achieve the target code length, locations for shortening or puncturing may be selected to ensure that the set of information bit locations satisfy the systematic encoding condition. In this way, the systematic polar code may include a set of systematic bits at the same locations as the information bits, and the systematic bits do not appear in any untransmitted (for example, punctured or shortened) locations.

Methods, systems, and devices for wireless communication are described. Some energy harvesting (EH)-capable devices may implement channel coding for backscatter-based communications (e.g., backscatter communications may be encoded using error correction codes). The same mother code may be used with different coding rates, for example based on puncturing or shortening applications. The EH-capable device may use the same mother code and different coding rates for backscatter-based communications based on operating conditions at the EH-capable device. For example, the mother code may be an (N, K) block code, and the EH-capable device may adjust the coding rate by applying S-bit shortening. As another example, the mother code may be a convolutional code using a defined number K of input information bits and a defined number N of encoded output bits, and the EH-capable device may adjust the coding rate by applying P-bit puncturing.

An apparatus comprising circuitry configured to perform a transport channel processing chain, the transport channel processing chain comprising a sub-carrier puncturing function, the sub-carrier puncturing function comprising puncturing, in each subframe of a composite transmission time interval, a set of subcarriers from at least one mapped physical resource block.

Systems and techniques are provided for wireless communications. For example, a process can include, obtaining a message for transmission to a receiving device, determining a plurality of beamforming weights for transmitting a portion of the message toward a direction of the receiving device. A number of beamforming weights is equal to a number of transmit array elements. Each beamforming weight corresponds to a respective transmit array element. A beamforming weight is configured to turn off a transmit array element during transmission of the portion of the message. The process can include outputting an array puncturing notification indicative of transmission of the portion of the message by the plurality of transmit array elements with the transmit array element corresponding to the beamforming weight turned off and transmitting the portion of the message by the plurality of transmit array elements with the transmit array element corresponding to the beamforming weight turned off.

Techniques to detect when received energy in a portion of a radio frequency band is an aliased image of a source device (e.g., a non-WLAN interferer) and not an actual emission / transmission from a device. The aliased image may be caused by artifacts associated with the radio frequency downconverting and digital signal processing / sampling of a downconverted received signal. A determination is then made whether preamble puncturing should be used in a channel that is impacted by the aliased image to avoid that portion depending on whether the transmitting / receiving radio that sends / receives traffic would also be impacted by that aliased image.

A method has the step of: transmitting or receiving a signal using a first resource unit (RU) in an orthogonal frequency-division multiple access (OFDMA) physical layer protocol data unit (PPDU). The first RU is selected from multiple first RUs of a first tone plan for the PPDU, which are same as second RUs of a second tone plan obtained by a tone-distribution method have the steps of: partitioning the PPDU into multiple subchannels, determining a third tone plan having third RUs, the tone indices of the third tone plan being greater than or equal to zero, and modifying tone indices of the third tone plan such that the modified tone indices thereof have negative and positive indices excluding a plurality of direct current (DC) tones at and around index zero, to obtain multiple modified third RUs as part of the second RUs for at least a first subchannel.

Various aspects of the present disclosure generally relate to wireless communication. For example, when an output from a systematic polar encoder has a coded bit length N that differs from a target code length E, locations for bit freezing may be selected such that a resulting set of information bit locations (including cyclic redundancy code (CRC) bit locations) satisfy a systematic encoding condition. Furthermore, when the coded bit length N exceeds the target code length E, such that shortening or puncturing is performed to achieve the target code length, locations for shortening or puncturing may be selected to ensure that the set of information bit locations satisfy the systematic encoding condition. In this way, the systematic polar code may include a set of systematic bits at the same locations as the information bits, and the systematic bits do not appear in any untransmitted (for example, punctured or shortened) locations.

Provided in the embodiments of the present application are a communication method and apparatus based on an LDPC code. When a base graph and a puncturing mode that are used for performing encoding or decoding are determined, the capability of a terminal device and an application scenario are taken into consideration. In this way, for whether the capability of the terminal device meets the requirement of the application scenario, different base graphs and / or puncturing modes may be selected, which is conducive to selecting an appropriate base graph and puncturing mode, thereby improving decoding performance.

The invention relates to the technical field of proxy re-encryption, in particular to an on-lattice puncturable attribute-based proxy re-encryption method and system. According to the invention, the trusted mechanism carries out centralized initialization and distributes the secret keys, so that the security guidance and authority management of the system are realized; the data owner autonomously executes encryption and re-encryption key generation, so that the flexibility of fine-grained access control and strategy updating of the full life cycle of the data is ensured; the cloud server only executes ciphertext conversion in a semi-trusted environment, so that efficient strategy migration is realized, and meanwhile, plaintext invisibility is ensured; the data receiver independently completes decryption and key puncture, so that the autonomy and controllability of the decryption process are ensured, a key revocation mechanism of a third party is not needed, the decryption authority of the specific label can be immediately and accurately revoked after the key is leaked, and the attack exposure time is greatly shortened. According to the method, the security problem caused by leakage of long-term data sharing in dynamic open environments such as the Internet of Vehicles is effectively solved, and unification of security, efficiency and privacy protection is realized.

The invention relates to a rate compatible LDPC (Low Density Parity Check) code construction and quasi-cyclic expansion method based on sequential deletion, belonging to the technical field of atmosphere laser communication, the method adopts a progressive edge growth algorithm to construct a quasi-cyclic LDPC code with good sparseness and large girth in the initial stage, and then utilizes statistics and ascending sorting of variable node degrees to construct a quasi-cyclic LDPC code with good sparseness and large girth. Deleting the variable nodes with lower degrees in sequence to realize dynamic adjustment of the original code rate; next, carrying out structure adjustment and reconstruction on the deleted check matrix, and forming a rate compatible LDPC code by redistributing a connection relation of deleted nodes and optimizing row weight distribution; according to the method, on the premise that the original code rate is not changed, through combination of sequential deletion and quasi-cyclic expansion, the multi-code-rate requirement is flexibly met, meanwhile, the error correction performance and hardware friendliness are kept to the maximum extent, and the method is suitable for high-reliability communication scenes such as deep space communication and satellite links.