An access system and method for orthogonal frequency division multiplexing of wireless transfer communication

A communication system and wireless communication technology, applied in the field of wireless relay communication OFDM access system, can solve the problems of complex structure, poor frequency diversity effect, high cost, etc.

Inactive Publication Date: 2007-05-16
HUAWEI TECH CO LTD
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The first is to divide the carrier into continuous groups, which is the simplest to implement, and the adjacent sub-channel interference is small, but the effect of frequency diversity obtained is poor
[0012] The second is that carriers of different sub-channels are interleaved in a regular manner. This frequency diversity effect is better, but the system is more sensitive to inter-sub-channel interference.
[0021] 1. RS needs to have two sets of FDD wireless transceivers, the structure is complex and the cost is high
[0022] 2. In the FDD communication mode, there may be mutual interference in the network system communication in the 4 situations shown in Figure 4(a)-(d)

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
  • An access system and method for orthogonal frequency division multiplexing of wireless transfer communication
  • An access system and method for orthogonal frequency division multiplexing of wireless transfer communication
  • An access system and method for orthogonal frequency division multiplexing of wireless transfer communication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0121] The present invention provides a wireless relay communication OFDM access system and method. The advanced relay communication mode of RS, BS and MS / SS provided by the present invention, as shown in FIG. 5, RS and BS, MS / SS The communication between SS adopts FDD / TDM / OFDMA mode, BS downlink and RS uplink use frequency f1, BS uplink and RS downlink use frequency f2; RS only needs a set of FDD wireless transceiver, RS accesses BS as a MS / SS, MS / SS performs wireless relay access to BS through RS.

[0122] In Figure 5, DL BS It is the downlink subframe of the physical layer frame of BS, from BS to SS / MS BS or RS, UL BS is the uplink subframe of the physical layer frame of the BS, by the SS / MS BS or RS to BS, SS / MS BS Keep sending and receiving frame synchronization with BS; DL RS It is the downlink subframe of the physical layer frame of RS, from BS to SS / MS RS or RS, UL RS It is the uplink subframe of the physical layer frame of the RS, which is determined by the SS...

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 related wireless transfer OFDM access method comprises: in down and up subframe of BS physical layer frame structure, employing TDM-TDM way to set down and up transfer areas; setting down/up transfer area on up/down subframe of physical layer frame structure of RSS FDD wireless receiver to define the transfer sub-channel of down/up transfer area and OFDMA label combination; among BS, RS and UE, using the said set BS and up-down physical layer frame of RS for wireless transfer communication by FDD way. This invention can ensure the transfer communication without interface.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a wireless relay communication orthogonal frequency division multiplexing access system and method. Background technique [0002] IEEE 802.16 is the first broadband wireless access standard, which mainly includes two versions: one is the broadband fixed wireless access version 802.16-2004 of the 802.16 standard, and the other is the broadband mobile wireless access version 802.16e of the 802.16 standard. Only two network elements are defined in the 802.16-2004 standard, specifically BS (base station) and SS (subscriber station); in the 802.16e standard, only two network elements are also defined, specifically BS and MS (mobile subscriber station). stand). [0003] At present, 802.16 Multihop Relay SG (802.16 Multihop Relay Research Group) only proposed the concept of RS (Relay Station) for WiMAX (Global Interoperability of Microwave Access). The relay communicati...

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): H04B7/15H04B7/26H04L27/26
Inventor 郑若滨
Owner HUAWEI TECH CO LTD
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