The present disclosure provides a communication method, base station and user equipment for configuring a parameter table in a wireless communication system including a base station and a user equipment, the communication method comprising: defining at both the base station and the user equipment a parameter table which includes whole entries of a legacy parameter table and extended entries; and transmitting from the base station to the user equipment a bitmap indication which indicates a sub-table selected from the parameter table, wherein the number of the entries in the sub-table is the same as in the legacy parameter table.

A data processing method includes: selecting, by a network device according to a downlink control information (DCI) format of DCI used for scheduling data, a modulation coding scheme (MCS) mapping table to be used, the MCS mapping table including a mapping relationship between multiple MCS indication information and multiple MCSs, the DCI format including a first DCI format and a second DCI format; determining, by the network device according to the MCS mapping table and an MCS used for processing the data, an MCS indication information carried in the DCI; and sending, by the network device, the DCI carrying the MCS indication information to a terminal device.

Provided are a CQI feedback enhancement method, a CQI feedback enhancement device, a CQI feedback enhancement system, a UE and a base station. The CQI feedback enhancement method includes: a base station sends downlink traffic data to a UE; the UE decodes the downlink traffic data; first information is sent to the base station in a case where an error result is obtained by decoding the downlink traffic data, where the first information includes an NACK instruction and an aperiodic CQI, or the first information includes one NACK state of multiple NACK states and different NACK states correspond to different CQIs; and the base station receives the first information.

This application discloses methods an apparatuses for sending and receiving uplink control information in the field of communications technology. In some implementations, a terminal device may receive first downlink control information (DCI) from a network device; determine, based on the received first DCI, that an uplink shared channel scheduled by using the first DCI is used to send only uplink control information (UCI); and send first UCI to the network device through the uplink shared channel scheduled by using the first DCI. In other words, the network device indicates to the terminal device by using DCI so that the terminal device can determine, based on an indication of the network device, whether the uplink shared channel scheduled by using the DCI is used to send only the UCI.

Described are methods, systems and devices for the transmission and reception of channel quality indicator (CQI) information over an physical channel to facilitate, for example, meeting block error rate requirements in emerging systems. One example method includes transmitting an index associated with a quality of the physical channel, where the index corresponds to an entry in a parameter table set. Another example method includes receiving an index associated with the quality of the downlink physical channel, and transmitting a plurality of data blocks, where contents of the plurality of data blocks are encoded and modulated using a code rate and a modulation scheme, respectively, which are selected from an entry in the parameter tables corresponding to the index. In both exemplary methods, one or more parameter tables include at least three entries comprising code rates having values less than or equal to 120/1024.

A data transmission method and a communications device, the method including: determining, by a first communications device, a target data transmission mode, where the target data transmission mode is used to indicate a quantity of times that the first communications device transmits an encoded-bit combination to a second communications device and an encoded-bit combination transmitted each time, the encoded-bit combination transmitted each time may include one encoded bit sequence or a plurality of encoded bit sequences, where the encoded bit sequence is obtained by encoding all or some of K information bits, and K is a positive integer, and sending, by the first communications device, the encoded-bit combination to the second communications device in the target data transmission mode, and receiving, by the second communications device, the encoded-bit combination sent by the first communications device, and decoding the encoded bit sequence included in the encoded-bit combination.

A terminal is disclosed that includes a receiver that receives downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH). The terminal also includes a processor that, when the DCI is cyclic redundancy check (CRC) scrambled by a radio network temporary identifier used to choose a modulation and coding scheme (MCS) table (MCS-RNTI), determines, based on the MCS-RNTI, a downlink phase tracking reference signal (PT-RS) position for the PDSCH. In other aspects, a radio communication method, a base station, and a system are also disclosed.

A data transmission method includes that a transmitter sends a random access request by using a first random access resource. The transmitter supports a first modulation scheme and a second modulation scheme, the second modulation scheme includes a high-order modulation scheme whose modulation order is higher than the modulation order of the first modulation scheme, and the first random access resource is configured to the transmitter supporting the second modulation scheme. The method further includes that the transmitter performs a data modulation in accordance with a target modulation scheme. The modulation is performed under a direction of a received random access response, and the target modulation scheme is one of the first modulation scheme and the second modulation scheme.

The present disclosure provides a communication method, base station and user equipment for configuring a parameter table in a wireless communication system including a base station and a user equipment, the communication method comprising: defining at both the base station and the user equipment a parameter table which includes whole entries of a legacy parameter table and extended entries; and transmitting from the base station to the user equipment a bitmap indication which indicates a sub-table selected from the parameter table, wherein the number of the entries in the sub-table is the same as in the legacy parameter table.

Various aspects of the disclosure relate to limits for modulation and coding scheme (MCS) values. For example, a first set of limits (e.g., minimum and maximum limits) may be used for a first MCS table and a second set of limits may be used for a second MCS table. The disclosure also relates in some aspects to inter-device signaling that indicates which minimum and maximum limits for an MCS table are to be used for communication between the devices.