Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for mapping physical stochastic access channel of TDD system to physical resource

A technology of physical random access and mapping method, which is applied in the field of mapping from physical random access channel to physical resource, can solve problems such as unreasonable PRACH mapping, achieve the effect of reducing inter-cell interference and overcoming uneven distribution

Inactive Publication Date: 2013-08-07
ZTE CORP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0039] The present invention aims to provide a mapping method for sending physical random access channels to solve the above-mentioned unreasonable problem of PRACH mapping

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 for mapping physical stochastic access channel of TDD system to physical resource
  • Method for mapping physical stochastic access channel of TDD system to physical resource
  • Method for mapping physical stochastic access channel of TDD system to physical resource

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] For PRACH configuration 13, when the uplink and downlink time slots are configured as 6, the starting positions of the four PRACH channels in the time domain are (0, 0, 0, 0), (0, 0, 1, 1), (0, 0, 0, 2), (0, 0, 1, 0), the sending position is as Figure 5 shown.

Embodiment 2

[0135] For PRACH configuration 14, when the uplink and downlink time slots are configured as 6, the starting positions of the four PRACH channels in the time domain are (0, 0, 0, 1), (0, 0, 1, 1), (0, 0, 0, 0), (0, 0, 1, 0), the sending position is as Image 6 shown.

Embodiment 3

[0137] Use Table 3 to determine the format, density and version number information of PRACH configuration 4.

[0138] The format of configuration 4 can be found directly from Table 3, which is preamble format 0;

[0139] For configuration 4, t RA 0 = 0 And there is a quadruple (f RA , t RA 0 , t RA 1 , t RA 2 ), then the density of configuration 4 is 1PRACH / 10ms or the density corresponding to the combination of configuration 4 and each non-N / A uplink and downlink time slot configuration is 1PRACH / 10ms;

[0140] The density is the same as configuration 4 and the PRACH format is also the same. The number of configurations is 3 (including configuration 4), which are configurations 3, 4, and 5 respectively, and their version numbers are 0, 1, and 2 respectively, so the version number of configuration 4 is 1.

[0141] The above embodiments of the present invention realize time-dispersion of ...

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 mapping method for a PRACH (Physical Random Access Channel) accessing to physical resource in TDD system, which includes the following steps: the index of the PRACH is configured as 13, UL / DL is configured as 6, and the initial position of four PRACH in time domain is respectively arranged at the first up-link sub-frame of the first half frame in each wireless frame, the second up-link sub-frame of the second half frame in each wireless frame, the third up-link sub-frame of the first half frame in each wireless frame and the first up-link sub-frame of the second half frame in each wireless frame. The mapping method of the invention can make the PRACH be evenly distributed by time when the PRACH needs to be processed by a same base station, and meanwhile the mapping method of the invention has the effect of reducing the second type PRACH interference between network cells to the most.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method for mapping physical random access channels to physical resources in a TDD system. Background technique [0002] The frame structure of LTE system TDD (Time Division Duplex, time division duplex) mode is as follows figure 1 shown. In this frame structure, a 10ms (307200Ts, 1ms=30720Ts) wireless frame is divided into two half-frames, each half-frame is 5ms long (153600Ts), including 8 common time slots with a length of 0.5ms, and three A special time slot, namely DwPTS (Downlink Pilot Time Slot, downlink pilot time slot), GP (Guard Period, guard interval) and UpPTS (Uplink Pilot Time Slot, uplink pilot time slot), and these three special time slots The sum of the lengths is 1ms (30720Ts). Subframe 1 always consists of three special time slots; when there are 2 downlink-to-uplink transition points within 10ms, subframe 6 consists of three special time slots; in other c...

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): H04W28/12
Inventor 郝鹏夏树强戴博梁春丽喻斌
Owner ZTE CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com