Abstract:
Base Station (BS) and User Equipment (UE) apparatuses for configuring a Random Access CHannel (RACH), and methods thereof, are provided. The method for a BS to configure a RACH includes generating configuration information on RACH resources, transmitting the configuration information on the RACH resources to a UE, receiving a random access preamble multiplexed on a plurality of continuous RACH resources from the UE, extracting the random access preamble multiplexed on the plurality of continuous RACH resources, and detecting the extracted random access preamble. The method for a UE to configure a RACH includes receiving configuration information on RACH resources from a BS, selecting occupied RACH resources among a plurality of continuous RACH resources, generating a random access preamble, multiplexing the generated random access preamble on the selected RACH resources, and transmitting the random access preamble on the selected RACH resources to the BS.
Abstract:
The present disclosure is to provide a method of configuring timing of uplink (UL) transmission, comprising, receiving, by a user equipment (UE), configuration information on carrier aggregation (CA) of at least one frequency division duplex (FDD) cell and at least one time division duplex (TDD) cell; and adjusting, by the UE, starting timing of a UL subframe in a cell participating in the CA.
Abstract:
Disclosed is a sounding reference signal transmission method which is efficient in an uplink wireless telecommunications system using a multiple antenna technique and sounding reference signal hopping. A terminal is equipped with a plurality of antennas, and a base station receives the sounding reference signal transmitted from these antennas and estimates the uplink channel state of each antenna. The sounding reference signal performs frequency hopping so that the base station determines the channel condition for the entire bandwidth to which data is transmitted in the uplink system. In this environment, the sounding reference signal is transmitted through an antenna pattern through the entire data transmission bandwidth of the uplink system for each antenna of the terminal without additional overhead.
Abstract:
Examples of the present application provide an interference cancellation method, system, device and a UE. The interference cancellation method of a communication network including a plurality of User Equipments (UEs) and Base Stations (BSs) includes: acquiring a Signal to Noise Ratio (SNR) and Interference to Noise Ratio (INR) of a downlink signal detected by a first UE and a SNR and INR of a downlink signal detected by a second UE, respectively through a first BS and a second BS; and notifying the first BS and the second BS of a transmission mode of associated UEs, wherein the first UE is located in a cell served by the first BS, and the second UE is located in a cell served by the second BS.
Abstract:
A method and apparatus are provided for transmitting and receiving an SRS. The method includes determining a number of single-carrier frequency division multiple access (SC-FDMA) symbols in an uplink pilot time slot (UpPTS); receiving index information for an SRS; determining an SRS offset, based on the index information; and transmitting the SRS, based on the SRS offset. If the index information includes an integer from 0 to 9, if the UpPTS includes two SC-FDMA symbols, a first symbol is indicated by SRS offset 0 and a second symbol is indicated by SRS offset 1, if the UpPTS includes one SC-FDMA symbol, the first symbol is indicated by the SRS offset 1. If the index information includes the integer from 0 to 9, the SRS is transmitted twice in a period of 5 ms and the SRS offset indicated by the index information is based on an offset index table.
Abstract:
A method and apparatus are provided for transmitting an uplink Sounding Reference Signal (SRS) by a User Equipment (UE). The method includes receiving information related to an SRS period and an offset for an SRS transmission; generating the uplink SRS; and when the information indicates the SRS period is 2 ms, transmitting the SRS in two Single Carrier Frequency Division Multiple Access (SCFDMA) symbols in a half frame according to the offset for the SRS transmission. When the information indicates the SRS period is 2 ms and a length of an Uplink Pilot Time Slot (UpPTS) in the half frame is two symbols, a first symbol in the UpPTS is indicated by offset 0 and a second symbol in the UpPTS is indicated by offset 1.
Abstract:
A method for configuring a special sub-frame of Long Term Evolved (LTE) Time Division Duplex (TDD) is provided. The method includes transmitting, by a base station a new signaling to configure special sub-frame configuration and related control parameters for the new User Equipment (UE); scheduling, by the base station, the uplink or downlink transmission of the new UE on the special sub-frame according to the special sub-frame configuration contained in the new signaling; performing, by the base station and the UE of the new version. downlink or uplink transmission on the special sub-frame according to the special sub-frame configuration contained in the new signaling and the scheduling of the base station. The base station may fully utilize available downlink resources, so as to increase resource utilization rate.
Abstract:
A base station includes a reference signal allocator that allocates a first layer of dedicated reference signals and a second layer of reference signals to the same resource elements in a first resource block. The reference signals are allocated to two adjacent resource elements corresponding to a first OFDM symbol and a second OFDM symbol on a first, second, and third subcarriers of the first resource block. The base station also includes a reference signal multiplexer that multiplexes the first layer with the second layer. A first cover code W1 is applied to the first layer. A second cover code W2, different from the first cover code, is applied to the second layer in a first and third subcarriers, and a variation of the second cover code W2′ is applied to the second layer in a second subcarrier.
Abstract:
The present invention is provided a method for transmitting ACK/NACK information. The method is applicable for a situation that uplink-downlink configurations of multiple Component Carriers (CCs) of a Carrier Aggregation (CA) are different. The method include: transmitting, by a NodeB, a UL grant to a UE, the UL grant includes a UL Downlink Assignment Index (DAI); receiving, by the UE, the UL grant and obtaining the UL DAI in the UL grant; and transmitting, by the UE, ACK/NACK information on a Physical Uplink Shared Channel (PUSCH), wherein the length of the ACK/NACK information or the number of elements of the ACK/NACK bundling is determined according to the UL DAI value of a CC that the PUSCH belongs to.
Abstract:
The present disclosure relates to a communication method and system for 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). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Embodiments of the present invention provide a method for transmitting a signal, comprising: selecting a starting position of the signal from a set of candidate starting positions for transmitting the signal; determining a symbol mapping of the signal based on a selected starting position or a set of candidate starting positions of the signal; and transmitting the signal is based on the symbol mapping. The embodiment of the invention also provides a corresponding apparatus.