Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for transmitting data under coexistence of LTE system and WiFi system on unlicensed frequency band

An unlicensed frequency band and data transmission technology, applied in electrical components, wireless communication, etc., can solve problems such as no longer applicable and inability to achieve optimal network performance, and achieve the effects of ensuring transmission, improving coexistence performance, and friendly coexistence

Inactive Publication Date: 2018-12-07
BEIJING JIAOTONG UNIV
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in an actual network, after a data collision does not mean that the next transmission will not collide again, and after the data is successfully transmitted, it does not mean that the next transmission can be successfully transmitted. At this time, the original back-off mechanism will no longer applicable
For some backoff mechanisms that adjust the contention window value linearly or multiplicatively after a data collision or successful transmission, it is not suitable for networks with frequent state changes. Static parameter adjustment of the contention window value cannot make the network performance optimal.

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
  • Method for transmitting data under coexistence of LTE system and WiFi system on unlicensed frequency band
  • Method for transmitting data under coexistence of LTE system and WiFi system on unlicensed frequency band
  • Method for transmitting data under coexistence of LTE system and WiFi system on unlicensed frequency band

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Based on the consideration of QoS, the original MAC layer protocol is newly defined in IEEE 802.11e, and two new access mechanisms of the MAC layer are proposed, Enhanced Distributed Channel Access (EDCA) and Hybrid coordination function controlled channel access (Hybrid Coordination Function Controlled Channel Access, HCCA). EDCA mainly improves DCF, enhances the consideration of QoS, and correspondingly increases the concepts related to QoS, so as to better meet the needs of users. EDCA is evolved on the basis of the DCF mechanism in the IEEE802.11e protocol. It supports and extends the original DCF mechanism for QoS, and introduces the QoS enhancement technology of the MAC layer, so that the wireless LAN can better serve voice and voice. Higher priority services such as video provide differentiated services.

[0050] In the EDCA mechanism, in order to meet the business needs of different priorities, access categories (Access Category, AC) serving different types of ...

Embodiment 2

[0089] image 3 A schematic diagram of the implementation principle of an EDCA-based ALBT mechanism provided by the embodiment of the present invention, Figure 4 The processing flowchart of a kind of EDCA-based ALBT mechanism provided for the embodiment of the present invention includes the following processing steps:

[0090] Step 1: LTE-U users want to send data, and judge the data sending situation at the current stage. If the data is sent successfully, go to step 2; if the data collides, go to step 3;

[0091] Step 2: First calculate the average collision probability of the LTE system, then determine the success multiplier factor in combination with the priority parameters of the business, and finally determine the contention window value of the LTE system during the back-off process after the data transmission is successful;

[0092] Step 3: First estimate the number of active users in the network, then determine the collision multiplier factor in combination with the ...

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 invention provides a method for transmitting data under the coexistence of an LTE system and a WiFi system on an unlicensed frequency band. The method includes the following steps that: when the LTE system and the WiFi system coexist in the unlicensed frequency band, the user equipment of the WiFi system performs data transmission with a binary exponential backoff mechanism, and the LTE systemperforms data transmission with an EDCA(Enhanced Distributed Channel Access)-based ALBT mechanism; and the EDCA-based ALBT mechanism includes a backoff mechanism after successful data transmission and a backoff mechanism after data collision. According to the method of the present invention, the EDCA-based ALBT mechanism is adopted, different types of data services use different parameters to complete channel access of different priorities, and small AIFSs and CWs are allocated to data services of higher priority; and therefore, it can be ensured that data of high priority can preferentiallyaccess channels, so that data transmission can be completed, and at the same time, the transmission of services of low priority can be ensured to the greatest extent, the coexistence performance of the Wi-Fi system is improved, and the friendly coexistence of the LTE system and the Wi-Fi system on the unlicensed frequency band can be ensured.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a data transmission method when an LTE system and a WiFi system coexist on an unlicensed frequency band. Background technique [0002] LTE-U (LTE in unlicensed spectrum, LTE system in unlicensed frequency band) is an enhanced technology of the fifth-generation mobile communication technology. The fair coexistence of LTE system and WiFi system in unlicensed frequency band is an inevitable trend of future communication development. An important application scenario in the fifth generation mobile communication (5G). The LTE system is based on the non-contention channel access technology, which allocates channel resources uniformly through the centralized scheduling of the base station, while the Wi-Fi system is based on the contention channel access technology, which uses carrier sense multiple access / collision avoidance (Carrier Sense Multiple Access / CollisionAvioda...

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): H04W74/08
CPCH04W74/0816
Inventor 徐少毅李超高原
Owner BEIJING JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com