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Data transmission method, terminal device, and network device

A technology for terminal equipment and network equipment, which is applied in the field of wireless communication and can solve problems such as the method is no longer suitable, the dynamic range is large, and the configuration is impossible.

Active Publication Date: 2019-02-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, since 5G technology will support multi-slot and flexible Reference Signal (RS) configuration, this makes the dynamic range of the number of REs actually used to carry data in a PRB extremely large.
As a result, the current method of determining TBS through table lookup is no longer suitable
In addition, in some scenarios in 5G, such as Ultra Reliable and Low Latency Communication (URLLC) services, there may be extremely low bit rate requirements, which cannot be configured through the table

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  • Data transmission method, terminal device, and network device
  • Data transmission method, terminal device, and network device
  • Data transmission method, terminal device, and network device

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Embodiment Construction

[0041] The technical solution in this application will be described below with reference to the accompanying drawings.

[0042] In the LTE system, the downlink and uplink are based on OFDMA and SC-FDMA respectively, and the time-frequency resources are divided into OFDM or SC-FDMA symbols in the time dimension (hereinafter referred to as time domain symbols, referred to as symbols) and subcarriers in the frequency dimension . The smallest resource granularity is called a resource element (Resource Element, RE), which represents a time-frequency grid point composed of a time domain symbol in the time domain and a subcarrier in the frequency domain.

[0043] The transmission of services in the LTE system is based on base station scheduling. The data packets of the upper layer are divided into small data packets with Transport Block (TB) as the unit when the physical layer is scheduled. The basic time unit of scheduling is generally a subframe with a duration of 1 ms. A subfram...

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Abstract

The invention provides a data transmission method, and the method can achieve the low-code-rate data transmission. The method comprises the steps that a terminal device receives downlink control information from a network device, wherein the downlink control information includes resource allocation information of a data channel, the indication information of a modulation and coding scheme (MCS), and the indication information of an adjustment factor, wherein the indication information of the adjustment factor indicates an adjustment factor in a set of values of the adjustment factor configuredthrough the high-layer signaling, and the adjustment factor is used to determine a first transport block size (TBS) of the data channel; the terminal device determines an adjustment factor from the set of values of the adjustment factor according to the indication information of the adjustment factor, and determining an MCS index from a candidate MCS index set according to the indication information of the MCS, wherein the MCS index set includes at least two candidate MCS indexes; the terminal device determines the first TBS according to the resource allocation information, the MCS index, andthe adjustment factor; the terminal device performs the reception or transmission of the data channel according to the first TBS.

Description

technical field [0001] The present application relates to the field of wireless communication, and in particular to a data transmission method, terminal equipment and network equipment. Background technique [0002] In a Long Term Evolution (LTE) system, service transmission is based on base station scheduling. The smallest unit of base station scheduling is a transport block (Transport Block, TB). Generally, the base station calculates the transport block size (Transport Block Size, TBS) according to a set of well-known algorithms, and carries the determined TBS information, MCS and resource allocation information in the downlink control information (Downlink Control Information, DCI) and sends it to the Terminal Equipment. The terminal device receives the DCI and calculates the TBS. Then, according to the calculated TBS, combined with the resource allocation information and the MCS, the downlink data is received and demodulated, or the uplink data is sent. In the curre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/18H04W28/22H04W72/04H04W72/14
CPCH04W28/18H04W28/22H04W72/23H04L1/00H04W72/04
Inventor 苏立焱官磊
Owner HUAWEI TECH CO LTD