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

Method and arrangement for communication using a dynamic transmission parameter

A technology of dynamic parameters and transmission schemes, applied in the direction of adjustment of transmission mode, transmission modification based on link quality, transmission system, etc., can solve problems such as performance degradation, and achieve the effect of increasing data rate, avoiding waste, and flexible complexity

Active Publication Date: 2015-12-23
TELEFON AB LM ERICSSON (PUBL)
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for many UEs not experiencing large delay spread, this long CP degrades performance

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 and arrangement for communication using a dynamic transmission parameter
  • Method and arrangement for communication using a dynamic transmission parameter
  • Method and arrangement for communication using a dynamic transmission parameter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Because there is an additional cost associated with using an extended CP, such a CP should only be used when it is suitable or required in terms of channel conditions. But even in cells where some UEs need extended CP, there are typically many UEs for which extended CP does not provide benefit. These UEs will actually achieve better performance if the carrier operates with a normal CP. But the use of normal CP will make the carrier useless for UEs with large time dispersion.

[0033] This document proposes a solution that is applicable eg in connection with a new carrier type NCT, eg when transmission is mandatory in such NCT only in subframes 0 and 5.

[0034]In the following, an example will be described where it is assumed that transmission is mandatory in certain LTE subframes. In order to link to the assumed properties of NCT, mandatory transmissions are taken in subframes 0 and 5 of an LTE frame in the example below. However, this should only be seen as an exam...

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

Base station and User Equipment (UE) and methods to be performed therein for communication using a dynamic transmission parameter. The method to be performed in a base station comprises scheduling of transmission resources to a UE in an OFDM symbol associated with a dynamic parameter value. The base station is assumed to be associated with a carrier where a radio frame comprises at least one OFDM symbol associated with a fixed parameter value and at least one OFDM symbol associated with a dynamic parameter value, where the parameter is a cyclic prefix, CP, or a subcarrier spacing, [delta]f. The method further comprises determining a value of the parameter based on a characteristic of a radio link associated with the UE, and applying the determined value of the parameter when communicating with the UE in the scheduled transmission resources.

Description

technical field [0001] The techniques suggested herein generally relate to communication between two nodes in a wireless communication system using dynamic transmission parameters. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) is a downlink modulation format used in the 3GPP Long Term Evolution (LTE) standard. with duration T u The OFDM symbol of consists of many subcarriers, each with Δf=1 / T u subcarrier spacing. Number of subcarriers N c and the subcarrier spacing determine the total transmission bandwidth of the OFDM signal, which can be approximated as BW≈Nc×Δf. In order to maintain subcarrier orthogonality in time dispersed channels, each OFDM symbol is used with duration T cp The cyclic expansion of to add prefixes. The total duration of the OFDM symbol then becomes T tot = T u +T cp . In principle, the cyclic prefix (CP) length should cover the maximum length of the expected time dispersion of the channel. However, CP repre...

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 Applications(China)
IPC IPC(8): H04L1/00H04L27/26H04W72/54
CPCH04L1/0006H04L27/2666H04L27/2607H04W72/542
Inventor P.弗伦格E.埃里克森
Owner TELEFON AB LM ERICSSON (PUBL)
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