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

MCS level acquisition method and device

A technology for acquiring methods and grades, applied in the fields of digital transmission systems, error prevention, electrical components, etc., can solve problems such as many parameters, no solutions, cumbersome and other problems, and achieve the effect of improving system performance, efficiency and accuracy

Active Publication Date: 2018-03-09
ZTE CORP
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the channel of the communication system is time-varying, the system needs to add a certain delay in ACK / NACK feedback, so using the historical ACK / NACK value to adjust the MCS of the current subframe will cause deviation; if the adjustment value is set to The size of the MCS can ensure that the MCS is selected to a suitable value, but this method requires more MCS adjustments to reach the appropriate MCS level, and the efficiency is low, and the parameters involved in determining the modulation and coding method in this way are many and cumbersome, making the use of After this method, the terminal (User Equipment, referred to as UE) takes a long time to access, and it is easy to be interrupted after access.
[0004] Aiming at the problem that the method of obtaining MCS level in related technologies is difficult to meet the requirements, no effective solution has been proposed so far

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
  • MCS level acquisition method and device
  • MCS level acquisition method and device
  • MCS level acquisition method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This preferred embodiment is described by taking the field of wireless communication as an example, and provides an adaptive method of a modulation and coding scheme under technical conditions such as multi-user, multi-antenna, and multi-point coordination. The MCS adaptive method of CoMP is easy to implement and has high accuracy.

[0059] The method is to determine an appropriate modulation and coding scheme according to the current channel situation, so as to send information to the maximum and achieve a higher transmission rate, thereby improving the channel efficiency and increasing the throughput of the entire communication system.

[0060] In this preferred embodiment, the terminal measures the downlink channel, obtains the channel estimation value and calculates the channel quality indicator (Channel Quality Indicator, referred to as CQI), the terminal reports the CQI to the serving base station, and the base station records the information related to this subfra...

Embodiment 2

[0086] This preferred embodiment provides an MCS adaptive implementation method of CoMP in the case of two cells (corresponding to M cells in Embodiment 1) and four users (corresponding to N users in Embodiment 1), Figure 5 It is a flow chart of the CoMP MCS adaptive method according to Embodiment 2 of the present invention, such as Figure 5 As shown, the method may include the following steps:

[0087] Step S502, the UE performs channel estimation, Image 6 It is a schematic diagram of the application of two cells and four users according to the MCS adaptive method of CoMP according to the second embodiment of the present invention, as shown in Image 6 As shown, the estimated base station eNB 1 with UE in this cell 1 and UE 2 The channel matrix H between 11 and H 21 , and base station eNB 2 UE in neighboring cells 1 and UE 2 The channel matrix H between 12 and H 22 . For cooperating cell eNB 2 For example, it is estimated that the cooperating cell eNB 2 with ...

Embodiment 3

[0108] The implementation scenario of this preferred embodiment is the same as that of Embodiment 2, refer to Image 6 . Step S502 and step S504 in this preferred embodiment are the same as those in Embodiment 2, and will not be repeated here.

[0109] In step S506, the base station looks up the table to obtain the SINR corresponding to the CQI value according to the CQI of the radio frame and the CQI of the radio frame where the subframe associated with the subframe is located, and performs a weighted average on it, plus the associated subframe The ACK / NACK lookup table of the frame obtains the SINR value to obtain the final SINR value.

[0110] Step S506.1, the base station according to the CQI of the radio frame and the CQI of the radio frame where the subframe associated with the subframe is located. For example, this subframe is subframe 9 in radio frame N+2, and its associated subframes are subframes 4 and 5 in radio frame N+1.

[0111] Step S506.2, look up the table ...

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 discloses a MCS (modulation and coding scheme) grade acquisition method and an apparatus thereof. The method comprises the following steps: receiving a radio frame where a first downlink subframe is located from UE, at least one CQI of a radio frame where a second downlink subframe is located and an HARQ result of the second downlink subframe, wherein a time distance of the CQI and the first downlink subframe is less than a threshold value; according to the received radio frame where the first downlink subframe is located and the CQI of the radio frame where the second downlink subframe is located, acquiring a reference SINR; according to the received HARQ result of the second downlink subframe, adjusting the reference SINR, and acquiring a MCS grade according to the adjusted SINR. By using the method and the apparatus of the invention, a problem that a mode of acquiring the MCS grade is difficult to reach a requirement in a correlation technology is solved; efficiency and accuracy of acquiring the MCS grade are increased; and system performance is increased too.

Description

technical field [0001] The present invention relates to the communication field, and in particular, to a method and device for obtaining a modulation and coding scheme (Modulation and Coding Scheme, MCS for short) level. Background technique [0002] In the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP for short) Long Term Evolution-Advanced (LTE-A for short) system, the coordinated multiple point transmission (Coordinated Multiple Point, CoMP for short) technology serves as A technology that solves inter-cell interference to improve cell edge and cell spectrum efficiency has been studied in depth in LTE R10, but due to time constraints, the design of many technologies has been simplified. Multiple-input-multiple-output (MIMO for short) technology is a technology to improve system performance, and this technology has been maturely applied in R10. [0003] In LTE, a modulation and coding scheme (Modulation and Coding Scheme, MCS for short) adop...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L1/00
Inventor 刘娟王衍文刘文豪
Owner ZTE CORP
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