A method and apparatus for data transmission
A technology of data transmission and transmission method, which is applied in the field of data transmission, and can solve problems such as the loss of the first data, the inability to receive the first data correctly, and affecting the reliability of data transmission.
Active Publication Date: 2018-12-11
HUAWEI TECH CO LTD
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[0004] However, in the prior art, if the blind detection of the uplink control information by the network device fails, the network device does not know that the terminal device uses the HARQ process to transmit the first data, and thus cannot receive the first data correctly; At the same time, the network device schedules the terminal device to use the HARQ process for initial transmission through the uplink authorization UL grant information in a later period (that is, instructs the terminal device to send second data different from the first data), and the terminal device receives the UL grant After information, it will be considered that the first data sent by using the HARQ process has been correctly received by the network device, then the terminal device will no longer send the first data, but send the second data on the HARQ process according to the UL grant information , resulting in the loss of the first data, seriously affecting the reliability of data transmission
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[0070] The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings.
[0071]The terms "component", "module", "system" and the like are used in this specification to refer to a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or a computer. By way of illustration, both an application running on a computing device and the computing device can be components. One or more components can reside within a process and / or thread of execution and a component can be localized on one computer and / or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. A compo...
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The embodiment of the invention provides a method and a device for data transmission. The method comprises the following steps: a terminal equipment sends a first data packet to a network equipment through a GUL transmission mode on a first time unit. The first data packet corresponds to a first HARQ process number and the first data packet corresponds to a first new data indication information. The terminal device receives first indication information sent by the network device, the first indication information is used for instructing the terminal device to send a second data packet on a second time unit, the second data packet corresponds to a first HARQ process number, wherein the second data packet corresponds to a second new data indication information sent by the network device. Theterminal device performs buffering processing on the first data packet according to the value of the first new data indication information and the value of the second new data indication information,or transmits the second data packet. Thus, the packet loss problem of the data can be reduced and the reliability of the data transmission can be improved.
Description
technical field [0001] The embodiments of the present invention relate to the communication field, and more specifically, to a data transmission method and device. Background technique [0002] At present, there is a known scheduling-free Grant free Uplink (GUL) transmission mechanism, or called an autonomous uplink (Autonomous UL, AUL) transmission mechanism, in which network devices allocate GUL resources to terminal devices, and the terminal devices When performing uplink transmission, there is no need to send a scheduling request (Scheduling Request, SR) to the network device and wait for the network device to send an uplink grant (Up Link Grant, UL Grant) information, and can directly perform uplink transmission through GUL transmission resources, thereby reducing transmission time. delay. [0003] In the prior art, when performing uplink transmission through the GUL transmission mechanism, the terminal device autonomously selects Hybrid Automatic Repeat Request (HARQ)...
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IPC IPC(8): H04L1/18
CPCH04L1/1806H04L1/1835H04L1/1896H04L47/283H04L5/0053H04L5/0044H04L5/0055H04L5/0078H04L1/1887H04L1/1822H04L1/1893H04L1/1864H04L1/0003H04L1/0007H04W72/1268H04W72/02H04W72/535H04L1/1812H04W72/0446H04W74/08H04W72/23
Inventor 李远官磊
Owner HUAWEI TECH CO LTD