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

Method and system for timing subframe

A frame timing and timing technology, which is applied in the field of communication, can solve the specific problems of relay subframe and access subframe, solve the timing problem of relay subframe and access subframe, ensure backward compatibility, The effect of flexible timing

Inactive Publication Date: 2011-05-11
ZTE CORP
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, after the introduction of the relay node, if the in-band relay adopts TDM (Time Division Multiplexing) to work, due to the self-interference between sending and receiving, a guard interval is required at the beginning or end of the subframe For switching between receiving / transmitting or transmitting / receiving, but there is no specific solution for timing of relay subframes and access subframes

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 and system for timing subframe
  • Method and system for timing subframe
  • Method and system for timing subframe

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0076] Such as Figure 4 Shown is the timing method of the subframe of the backhaul link. The base station determines the timing advance according to the propagation delay between the base station and the relay node, and sends it to the relay node in the form of an advance command. The timing advance (also referred to herein as the timing amount) is twice the propagation delay between the base station and the relay node. The uplink backhaul link subframe on the relay node side is transmitted in advance according to the time corresponding to the downlink backhaul link subframe on the relay node side.

[0077] Among them, Tx refers to the transmitted data; Rx refers to the received data; Tx control refers to the control information transmitted by the relay to its subordinate UE in the first or first two OFDM symbols; BRTT refers to the round-trip propagation time of the backhaul link.

example 2

[0079] Such as Figure 5Shown is the timing of access link subframes. Among them, ARTT refers to the round-trip propagation time of the access link. The relay node determines the timing amount according to the measured propagation delay between the relay node and the terminal, and the propagation delay between the base station and the relay node determined by the received TAC issued by the base station, and uses the advance command The form is sent to the terminal. The timing amount is twice the propagation delay between the base station and the relay node, plus twice the propagation delay between the relay node and the terminal.

[0080] The uplink access link subframe on the terminal side is transmitted in advance according to the time corresponding to the uplink backhaul link subframe on the relay node side or the uplink access link subframe on the relay node side.

example 3

[0082] Such as Image 6 Shown is the timing mode of the subframe of the direct transmission link, where DRTT refers to the round-trip propagation time of the direct transmission link. After the base station measures the propagation delay between the base station and the terminal, it determines the timing advance and sends it to the relay node in the form of an advance command. The subframe of the uplink direct transmission link on the terminal side is based on the subframe The corresponding time is advanced for transmission, and the amount of time advance is twice the propagation delay between the base station and the terminal.

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 and a system for timing a subframe, applied to a communication system adopting a relay node. The method comprises the steps of: timing an uplink return link subframe at a relay node side according to a downlink return link subframe of the relay node side, determining timing quantity by using a time advance command (TAC) sent by a base station; and when the relay node sends an uplink signal to the base station, sending the advanced timing quantity according to the initial time of the downlink return link subframe of the relay node side. According to the technical scheme provided by the invention, the invention can be better suitable for a link between the relay node and the base station and is flexible in a timing mode without increasing the signaling overhead, thereby ensuring the backward compatibility and solving the problem of timing of the relay subframe and an access subframe.

Description

technical field [0001] The present invention relates to the communication field, and more specifically, to a subframe timing method and system. Background technique [0002] LTE (Long Term Evolution, long-term evolution) system, LTE-A (LTE Advanced, LTE enhanced) system, IMT-Advanced (International Mobile Telecommunication Advanced, advanced international mobile communication system) are based on OFDM (Orthogonal Frequency Division Multiplexing, positive Cross frequency division multiplexing) technology as the basis. In the OFDM system, it is mainly in the form of time-frequency two-dimensional data. Such as figure 1 As shown, in LTE and LTE-A, a resource block (Resource Block, RB for short) is defined as an OFDM symbol within one continuous slot (slot) in the time domain, and 12 or 24 subcarriers in the frequency domain, so 1 RB includes resource units (Resource Element, referred to as RE), where N symb Indicates the number of OFDM symbols in one slot, Indicates the...

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): H04B7/26H04L27/26
CPCH04W56/00
Inventor 毕峰梁枫袁明杨瑾吴栓栓姜静
Owner ZTE CORP
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