Method and device for determining bit block size

Abstract

Embodiments of the present invention provide a method and device for determining the size of a bit block. The TBS index is determined by querying the first index table according to the MCS index, and the target bit block size is determined by querying the second index table according to the TBS index and the number of PRBs. In this process, since the TBS index corresponding to each MCS index in the first index table increases, the bit block size corresponding to the newly added TBS index is expanded in the second index table, and the larger the TBS index, the corresponding bit block bigger. Therefore, the first index table and the second index table are adapted to the uplink 256AQM. In the process of sending uplink data, the available REs in the RB can be used as much as possible to increase the uplink code rate and reduce the loss caused by the uplink peak rate, thereby improving the uplink data rate. Peak throughput and spectral efficiency.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a method and device for determining the size of a bit block. Background technique [0002] In a long term evolution system (Long Term Evolution, LTE), an evolved base station (eNodeB, eNB) schedules a terminal (User Equipment, UE) to implement uplink and downlink data transmission. During the scheduling process, the UE reports Channel State Information (CSI) to the eNB, and the eNB determines the Modulation and Coding scheme (MCS) index according to the CSI, and determines the Transport Block Size (TransportBlock Size, TBS) index, and then determine the bit block size according to the TBS index and available Physical Resources Block (PRB), and then generate downlink control information (Downlink Control Information, DCI) according to the MCS index, TBS index, and bit block size ) and sent to UE. [0003] The R12 protocol defines two sets of downlink MCS-TB...

AI Technical Summary

Problems solved by technology

[0004] However, the resource overhead of downlink scheduling is relatively large, while the resource overhead of uplink scheduling is less. Compared with downlink scheduling, there are more resource elements (Resource Elements, REs) available in each resource block (Resource Block, RB) in uplink scheduling.

When the UE supports uplink 256QAM and the channel quality is good, even if the TBS index corresponding to the highest order of the MCS is used, the size of the bit block corresponding to the TBS index is limited, so it is impossible to use the available REs in the RB as much as possible.

When the available REs in RBs are not utilized to the maximum extent, the uplink code rate is relatively low during uplink data transmission, which causes a loss to the uplink peak rate, which in turn leads to low uplink peak throughput and low spectral efficiency.

Images