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

Base station and user terminal downlink subframe feedback method and device

A user terminal and feedback device technology, applied in the field of communication, can solve the problems of network resource allocation, uplink and downlink transmission conflicts, limited use flexibility, etc., and achieve the effect of balancing feedback overhead.

Inactive Publication Date: 2018-12-21
POTEVIO INFORMATION TECH CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a downlink subframe feedback method and device for a base station and a user terminal to solve the technical problems in the prior art that the flexibility of use is limited, and it is easy to cause network resource allocation and uplink and downlink transmission conflicts

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
  • Base station and user terminal downlink subframe feedback method and device
  • Base station and user terminal downlink subframe feedback method and device
  • Base station and user terminal downlink subframe feedback method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1 of the present invention provides a downlink subframe feedback method under the TDD-LTE system to explain a specific implementation process of the embodiment of the present invention in detail, see image 3 :

[0055] Step 301: Determine the downlink subframe feedback rule according to the actual usage of the uplink and downlink subframes.

[0056] In this step, it is first necessary to select an appropriate UL-DL configuration and subframe offset according to the actual usage of the uplink and downlink subframes. see Figure 4 , so that the TDD-LTE system in this embodiment 1 actually uses UL-DL configuration #1, and specifies different subframe offsets λ for different UEs, wherein the reference configuration indicated for UE1 is {UL-DL configuration #2 , subframe offset λ=0}, the reference configuration indicated for UE2 is {UL-DL configuration #2, subframe offset λ=1}.

[0057] According to the downlink subframe feedback rules, referring to Table 1, t...

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 feedback method and a feedback device for downlink subframes of a base station and a user terminal. The base station downlink subframe feedback method comprises the steps of: determining a downlink subframe feedback rule which comprises UL-DL configuration and subframe offset according to actual use condition of uplink and downlink subframes, and informing the user terminal; and carrying out communication reception according to the downlink subframe feedback rule. The feedback method and the feedback device for the downlink subframes of the base station and the user terminal can select uplink subframes bearing HARQ-ACK flexibly on the bases of ensuring that the HARQ-ACK of all downlink subframes can be fed back normally. The feedback method provided by the embodiment of the invention maintains the backward compatibility of an FDD / TDD LTE system, can effectively balance HARQ-ACK feedback overhead of each uplink subframe, is suitable for the scene that the uplink subframes cannot operate normally due to causes such as interference, and can help technologies such as carrier aggregation, double connection and D2D to realize coexistence usage.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a downlink subframe feedback method and device for a base station and a user terminal. Background technique [0002] The current Long Term Evolution (LTE) / LTE-A system includes two modes: Time Division Duplexing (TDD) and Frequency Division Duplexing (FDD). Each downlink subframe is based on 3GPP TS36 .213 specification to determine the corresponding uplink subframe to feed back the hybrid automatic repeat request acknowledgment (hybridautomatic repeatrequest acknowledgment, HARQ-ACK), wherein, for the FDD LTE / LTE-A system, the HARQ-ACK of subframe n-4 is specified by the subframe n feedback; and for the TDD LTE / LTE-A system, the corresponding specifications are given in Table 1, namely: subframe n-k m (k m ∈K:{k 0 ,k 1 ,...,k M-1}) HARQ-ACK is fed back by subframe n. [0003] [0004] Table 1 Downlink association set index of TDD system [0005] Since th...

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): H04L1/16H04L1/18
Inventor 陈哲鲁智池连刚
Owner POTEVIO INFORMATION TECH CO LTD
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