Abstract:
A method and apparatus are provided for recovering data efficiently even when data loss has occurred over a channel or network. The packet transmission method includes arranging a first transmission packet in a source symbol in a first region of a source block; arranging a second transmission packet in a space starting with an empty space of a last source symbol where the first transmission packet is arranged, remaining after arranging the first transmission packet; arranging information related to the second transmission packet in a second region of the source block; performing Forward Error Correction (FEC) encoding on the source block; and transmitting the encoded source block.
Abstract:
A method for bit-interleaving coded bits for Incremental Redundancy (IR) transmission in a transmission apparatus of a digital video broadcasting system is provided. The method includes sequentially writing the coded bits in a memory area having a predetermined size, reading the coded bits written in the memory area based on a reading order that is differently set for each of normal transmission and at least one IR transmission, and outputting one coded systematic bit stream interleaved for the normal transmission and at least one coded parity bit stream interleaved for at least one IR transmission.
Abstract:
A method and an apparatus for transmitting and receiving a packet in a broadcasting and communication system are provided. The method includes splitting a source packet block including source packets into a plurality of source packet subblocks, converting the source packet subblocks to source symbol subblocks, respectively, generating a plurality of first repair symbol blocks by encoding the source packet subblocks using a first error correction code, configuring an error correction source packet by adding a source error correction payload IDentifier (ID) to source symbols included in the source symbol subblocks and configuring an error correction repair packet by adding a repair error correction payload ID to repair symbols included in the first repair symbol subblocks, and transmitting the error correction source packet and the error correction repair packet.
Abstract:
An encoding method for encoding input information bits using an encoder implemented with concatenation of a CRC-α coder and a polar coder is provided. The method includes performing Cyclic Redundancy Check (CRC) coding on as many information bits as a determined number of CRC coding bits among input information bits and performing polar coding on the CRC-coded information bits and other information bits than the CRC-coded information bits.
Abstract:
A method and an apparatus are provided for decoding a channel in a communication system using a LDPC code. A shortening pattern and a puncturing pattern are determined based on a received signal. A value of a shortened bit is set to 0 according to the determined shortening pattern, erasures are set according to the determined puncturing pattern, and LDPC decoding is performed, when bits exist which have been used to perform shortening or puncturing. Determining the shortening pattern and the puncturing pattern includes setting a predetermined ratio of the number of punctured bits to the number of shortened bits.
Abstract:
The present disclosure relates to a communication system, such as a 5G or 6G communication system, capable of supporting higher data transmission rates. Methods and associated devices for transmitting information in a wireless communication system, according to embodiments of the present disclosure, include, but are not limited to, a method for configuring a CQI table, a method for configuring an MCS table, methods for determining related LBRM, PT-RS and system-supported maximum data rates, and a method for determining MCS for retransmission.
Abstract:
The disclosure relates to converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT), and may be applied to intelligent services based on the 5G communication technology and IoT-related technology. To do so, a method and apparatus are provided for transmitting groupcast/broadcast/multicast data and control information in the downlink and uplink. The method and apparatus include features for transmitting to a user equipment (UE), configuration information for multicast and broadcast services (MBS), encoding a first bit sequence for the MBS based on a channel coding, identifying a transport block size (TBS) for limited buffer rate matching (LBRM) based on the configuration information, performing the LBRM to the encoded first bit sequence based on the identified TBS, and transmitting to the UE, a second bit sequence identified based on the LBRM.
Abstract:
The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. In addition, the present disclosure relates to a method carried out by a base station of a wireless communication system, and a device for carrying out same, the method comprising the steps of: determining whether a frequency band operated by a base station uses a bandwidth that is narrower than a preset bandwidth; if a bandwidth that is narrower than the preset bandwidth is used, determining a subcarrier spacing (SCS) that is narrower than a preset SCS; generating a synchronization signal block (SSB) using the determined SCS; and transmitting the SSB, wherein the determined SCS is smaller than 15 kHz.
Abstract:
Disclosed are a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system; and a system therefor. The present disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security, and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. The present invention relates to a method and device for managing transmission beams of a terminal in a 5G system.
Abstract:
A method performed via a terminal in a communication system, may include: receiving, from a base station, semi persistent scheduling (SPS) configuration information from a base station; identifying, in the case that an SPS activation signal is detected, a set of SPS physical downlink shared channels (PDSCHs) based on the SPS configuration information and the SPS activation signal; receiving, from the base station, in the case that a plurality of SPS PDSCHs are included in the set of the SPS PDSCHs within one slot, data by based on selecting an SPS PDSCH with a lowest index; and excluding the selected SPS PDSCH and a PDSCH overlapped with the selected SPS PDSCH from the SPS PDSCH set, wherein in the case that there are two or more SPS PDSCHs with the lowest index, the data is received through the SPS PDSCH selected based on information included in the SPS activation signal.