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

Transmission method in direct mode

A direct mode and transmission method technology, applied in wireless communication, electrical components, network data management, etc., can solve the problems of reducing effective coverage distance, increasing terminal processing delay, and waste of terminal processing resources, so as to improve power amplifier efficiency and coverage distance, reduce signal peak-to-average ratio, and save processing resources

Inactive Publication Date: 2018-03-30
POTEVIO INFORMATION TECH CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, for a DMO system where the calling terminal frequently changes, the DMO terminal demodulates the PDCCH in the full frequency band of each subframe, which will cause unnecessary waste of terminal processing resources, reduce the effective coverage distance, and increase the processing delay of the terminal. Therefore, The modulation method of PDCCH in LTE radio frame is not suitable for DMO data transmission

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments.

[0016] The core idea of ​​the present invention is: for ePDCCH and user signals, use frequency division multiplexing and ePDCCH channel adopts centralized resource mapping, so that the subordinate DMO terminal can communicate normally without demodulating the full-band PDCCH channel, and adopts multiple A DFT modulation method (NxDFT SC-FDMA) enables the master control terminal to send different MCS service data for the different wireless channel environments of the subordinate DMO terminals, thereby reducing the signal peak-to-average ratio and improving power amplifier efficiency and coverage distance.

[0017] Embodiments of the present invention mainly include the following contents:

[0018] For the data that needs to be transmitted to the slave DMO terminal curre...

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 present application discloses a direct mode transmission method, including: for the data currently to be transmitted to the slave DMO terminal, the master controls the direct mode DMO terminal, adopts the DMO dedicated wireless frame format, generates a corresponding DMO wireless frame and sends it to the slave DMO terminal. Wherein, when the data includes the user's DMO service information, the generating includes: using the enhanced physical downlink control channel ePDCCH channel and user signals to perform frequency division multiplexing, and the ePDCCH channel adopts a centralized resource mapping method, The DMO service information and corresponding control information are modulated according to the NxDFT SC-FDMA modulation mode. By adopting the invention, data transmission between DMO terminals can be realized.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a transmission method under a direct mode operation (Direct Mode Operation, DMO) in a trunking system. Background technique [0002] At present, the DMO technology is introduced into the trunking system implemented based on the LTE system. The terminal off-network direct mode in the cluster system refers to direct communication between two or more terminals without forwarding through the base station and the network. The communication range of the DMO mode can be within the area covered by the network, or the area that cannot be reached by the network coverage, so the DMO mode is an effective expansion of the original system communication. [0003] One of the characteristic functions of professional trunking communication is the terminal off-network direct communication. For an LTE-based cluster network, the direct mode terminal (DM-UE) communication mode is the DMO ba...

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): H04W8/14
Inventor 强剑锋王栋赵顾良陈哲王岚陈永
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