Unlock instant, AI-driven research and patent intelligence for your innovation.

Data transmission method, device and system

A data transmission method and data transmission technology, which are applied in the field of data transmission methods, devices and systems, and can solve problems such as large transmission delays

Inactive Publication Date: 2016-08-24
ZTE CORP
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] For FBE, if the result of the CCA detection is that the channel is busy, the CCA detection must be performed again at the position specified in the next transmission frame. As a result, the LAA transmission node has a higher chance of using an unlicensed carrier than other systems (such as WIFI) is low, and because the channel is busy, it must wait until the next transmission frame to have a chance to transmit, so the transmission delay is relatively large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Data transmission method, device and system
  • Data transmission method, device and system
  • Data transmission method, device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0184] For FBE in Europe, the channel occupancy time is 1 ms to 10 ms, and the idle time is at least 5% of the channel occupancy time. The specific channel occupation time can be configured. The frame structure of LTE is based on a subframe, and a subframe lasts for 1 ms. Therefore, the channel occupancy time can be configured as 1 to 10 LTE subframes. Considering that the transmission of LTE is in units of OFDM symbols, the duration of an OFDM symbol that does not contain a cyclic prefix (CP: Cyclic Prefix) is 66.7us, and under the conventional cyclic prefix, the duration of an OFDM symbol that includes a cyclic prefix is ​​71.9us ( The first symbol of the time slot) or 71.3us (other symbols), under the extended cyclic prefix, the duration of the OFDM symbol including the cyclic prefix is ​​83.3us. If the idle time is also in the unit of OFDM symbol, the required idle time is shown in Table 1 for different channel occupancy time configurations:

[0185]

[0186] Table 1 ...

Embodiment 2

[0190] The design of the transmission frame in Embodiment 1 is a traditional FBE design, that is, there is only one CCA detection position in a transmission frame. As mentioned above, for the traditional FBE design, due to the limited detection position of CCA, the opportunity of the transmission node to access the unlicensed carrier is relatively low, and the transmission is relatively large. Therefore, an improved FBE design is needed.

[0191] Based on this, this embodiment provides a data transmission method of an unlicensed carrier, the method including:

[0192] Determining a CCA detection position, the transmission node performs CCA detection at the CCA detection position, and if the detection result shows that the unlicensed carrier is in an idle state, data transmission is performed on the unlicensed carrier, wherein the Data transmission includes uplink transmission and downlink transmission, and the subframe including CCA detection is a listening subframe.

[0193]...

specific Embodiment 2-1

[0199] For a transmission frame of 1 ms, such as Figure 3A with Figure 3B The figure shows a CCA detection position pattern of a transmission frame of 1 millisecond, and there is one CCA detection position in a transmission frame, which is respectively located at the end and front end of the transmission frame of 1 millisecond.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The embodiment of the invention discloses a data transmission method, a device and a system. The method comprises a step of determining the detection position of a clear channel assessment (CCA), a step of carrying out CCA detection at the detection position of the CCA, and a step of carrying out data transmission in an unauthorized carrier in a condition that the detection result is that the unauthorized carrier is in an idle state, wherein, the data transmission comprises uplink and / or downlink transmission. According to the technical scheme of the embodiment of the invention, the detection position of the CCA is not the fixed position in a transmission frame, the adjustment can be carried out according to an actual condition, thus the access opportunity of FBE can be increased, and transmission delays are reduced.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a data transmission method, device and system. Background technique [0002] As we all know, LTE is deployed and operated on licensed carriers, but with the rapid growth of data services, licensed carriers will no longer be able to bear such a huge amount of data in the near future. Therefore, deploying LTE on unlicensed carriers and sharing data traffic on licensed carriers through unlicensed carriers is an important evolution direction for subsequent LTE development. [0003] In addition, there are many advantages for unlicensed carriers: free / low cost; low access requirements and low cost, for example, individuals and enterprises can participate in the deployment, and the equipment of equipment manufacturers can be arbitrary; operation and sharing in multiple different systems When the spectrum is in use, or when different operators of the same system o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04L5/00H04L1/24H04W72/12
CPCH04L5/00
Inventor 梁春丽戴博杨维维鲁照华
Owner ZTE CORP