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

Method for performing point-to-point off-line direct mode operation under public network time division-long term evolution (TD-LTE)

A technology of off-net direct connection and communication method, which is applied in wireless communication, synchronization devices, electrical components, etc., and can solve problems such as inability to realize communication

Inactive Publication Date: 2013-06-19
HARBIN INST OF TECH
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the following communications (quasi-duplex) are currently not possible in an area without base stations:

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

specific Embodiment approach 1

[0042] The specific embodiment one, the point-to-point off-network direct communication method under the public network TD-LTE,

[0043] Its voice call method between the user who initiates the session and the user who receives the session is realized by the following steps:

[0044] Step A1, the user who initiates the session monitors the PSCH channel, looking for idle continuous bandwidth;

[0045] Step A2, the user initiating the session judges whether an idle continuous bandwidth is found, if the judgment result is yes, then execute step A3; if the judgment result is no, then return to execute step A1;

[0046] Step A3, the user who initiates the session sends preamble information to the PRACH channel;

[0047] Step A4, the receiving session user monitors the PRACH channel, and receives the preamble information sent by the session initiating user in step A3;

[0048] Step A5, the receiving session user synchronously decodes the preamble information sent by the session in...

specific Embodiment approach 2

[0090] Specific embodiment two, the present invention is described below in conjunction with specific embodiment, comprise 3 users in the present embodiment, namely A (promptly initiate session user), B (promptly receive session user) and C (new initiate session user);

[0091] The specific process is:

[0092] 1. A monitors the PSCH channel to find idle continuous bandwidth.

[0093] 2. After A finds enough continuous bandwidth, it sends preamble information (notification of session start) to PRACH;

[0094] The preamble information is as follows:

[0095] The synchronization information of the preamble information: including the primary synchronization signal (Zadoff-Chu sequence) and the secondary synchronization signal (m sequence), the receiving end can obtain the terminal information of A by decoding the synchronization information (decoding process: time synchronization, frequency synchronization);

[0096] Bandwidth information to be occupied by the session: the firs...

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 method for performing point-to-point off-line direct mode operation under public network time division-long term evolution (TD-LTE), relates to a method for performing off-line direct mode operation and aims to realize voice communication between users in a base station-free area, and switching of voice communication between the users. A voice communication method comprises the following steps that a session initiation user monitors a physical shared channel (PSCH), finds an idle continuous bandwidth, and sends preface information to a physical random access channel (PRACH); a session receiving user receives the information and decodes the information synchronously, and then replies session confirmation information; the session initiation user receives the session confirmation information sent by the session receiving user and establishes voice communication between the session initiation user and the session receiving user; and a method for switching the voice communication between the users comprises the following steps that the session receiving user judges the priority level of a new session initiation user and the session initiation user, selects the user with the higher priority level and performs voice communication with the user with the higher priority level. The method is suitable for point-to-point off-line direct mode operation under the public network TD-LTE.

Description

technical field [0001] The invention relates to an off-network direct communication method. Background technique [0002] Currently, communication between multiple users relies on base stations for signal transmission. However, the following communications (quasi-duplex) are currently not possible in an area without base stations: [0003] 1. Voice calls between users; 2: Switching of user voice calls (for the priority of the user who dials him). Contents of the invention [0004] The present invention aims to realize the voice call between users and the switching of the user's voice call in an area without a base station, thereby providing a point-to-point off-network direct communication method under the public network TD-LTE. [0005] A point-to-point off-network direct communication method under public network TD-LTE, [0006] Its voice call method between the user who initiates the session and the user who receives the session is realized by the following steps: ...

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): H04W76/02H04W74/08H04W56/00
Inventor 赵震吴少川白旭叶亮贾丹孙仁强
Owner HARBIN INST OF TECH
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