Data packet processing method and device in ofdma system

A processing method and data packet technology, which are applied in the field of data packet transmission to achieve the effects of improving performance, improving decoding speed, and speeding up

Active Publication Date: 2019-12-06
ZTE CORP
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Unfortunately, there is currently no relevant technology for reference

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
  • Data packet processing method and device in ofdma system
  • Data packet processing method and device in ofdma system
  • Data packet processing method and device in ofdma system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] image 3 It is a flowchart of a data packet processing method in an OFDMA system according to Embodiment 1 of the present invention, such as image 3 As shown, the OFDMA system data packet processing method of the embodiment of the present invention comprises the following steps:

[0057] 300. Perform code block segmentation on the source data packet to be transmitted to obtain d data blocks;

[0058] 301. Add a CRC sequence to each data block respectively;

[0059] 303. Perform error correction coding on the d data blocks after adding the CRC sequence,

[0060] 305. Perform grouping to obtain a information data packets of equal length;

[0061] 306. Perform packet encoding on a information data packet to obtain b verification data packets;

[0062] 307. Perform constellation mapping modulation on the a information data packets to obtain a first modulation symbol sequence with a length of k1, and perform constellation mapping modulation on the b verification data pa...

example 1

[0120] In an OFDMA communication system, a single OFDM symbol has 1024 subcarriers, and the number of valid data subcarriers is 800. This example is used for the first transmission node to transmit data for the mobile user 100 to the second transmission node for the base station 101, such as figure 1 shown. The data packet processing method in the OFDMA system of the embodiment of the present invention at least includes the following steps, such as image 3 Shown:

[0121] 300. Perform code block segmentation on the 1968-bit source data packet to be transmitted to obtain d=6 data blocks, each of which has a length of 328 bits;

[0122] 301. Add a CRC sequence of h=8 bits to each data block respectively. After adding the CRC sequence, the length of each data block becomes 336 bits. Since the length of each data block is equal and equal to the mother code input bit is 336 bits, so No first fill required;

[0123] 303. Perform Turbo error correction coding on the d=6 data blo...

example 2

[0131] The difference between example 2 and example 1 is that each information packet obtained by grouping in step 305 has 2 * 672 bits and the modulation mode adopted by the second modulation symbol sequence in step 307 is 16QAM, as follows:

[0132] In step 305, the data after the Turbo error correction encoding is grouped to obtain equal-length a=3 information data packets, each information data packet has 2 * 672 bits, and each information data packet has 2 Turbo error correction encoding blocks ; Then in step 306, the length of a check data packet obtained by packet encoding is also 2×672 bits;

[0133] In step 307, the length of the first modulation symbol sequence is k1=2016 constellation mapping modulation symbols, the modulation order is Mod1'=2, the constellation mapping modulation mode is QPSK, and the length of the first modulation symbol sequence is k2=336 Constellation mapping modulation symbols, the modulation order is Mod2'=4, and the constellation mapping modu...

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 embodiment of the present invention discloses a data packet processing method and device in an OFDMA system. The method includes: performing code block segmentation on the source data packet to obtain d data blocks; adding cyclic redundancy check codes to the d data blocks respectively CRC sequence, perform error correction encoding respectively; group d data blocks after error correction encoding to obtain a information data packets; perform packet encoding on a information data packets to obtain b verification data packets; perform constellation mapping Modulate to obtain the first modulation symbol sequence of length k1 corresponding to a information data packet and the second modulation symbol sequence of length k2 corresponding to b verification data packets; the first modulation symbol sequence according to time Sequential maps to consecutive M ofdm1 OFDM symbols, map the second modulation symbol sequence to consecutive M ofdm2 OFDM symbols; send M ofdm1 OFDM symbols and M ofdm2 OFDM symbols.

Description

technical field [0001] The invention relates to a data packet transmission technology in an Orthogonal Frequency Division Multiple Access (OFDMA, Orthogonal Frequency Division Multiple Access) system, in particular to a data packet processing method and device in an OFDMA system. Background technique [0002] OFDMA multiple access technology is one of the key technologies in the fourth-generation mobile communication Long Term Evolution (LTE, Long Term Evolution) system. It can combine space-time coding technology, inter-symbol interference and inter-channel interference suppression and smart antenna technology to maximize Improve the performance of the communication system and improve the communication throughput. In the fourth-generation mobile communication LTE system, downlink communication adopts multi-carrier OFDMA technology, and uplink adopts single-carrier frequency division multiple access (SC-FDMA, Single-carrier Frequency Division Multiple Access) technology. ...

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): H04L5/00H04L1/00
CPCH04L5/00H04L1/004H04L27/2602H04L27/26035H04L1/0041H04L1/0061H04W28/04
Inventor 李立广徐俊许进
Owner ZTE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap