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LAA transmission method and device in cellular communication

A signaling and useful signal technology, applied in the field of subframe structure on unlicensed spectrum

Active Publication Date: 2016-04-27
SHANGHAI LANGBO COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A topic that needs to be discussed when LBE is applied to LTE is: when the transmission time or termination time of LBE corresponds to a time other than the "traditional" time on the LAA carrier, the mapping of LTELAA radio signals to physical layer resources

Method used

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  • LAA transmission method and device in cellular communication
  • LAA transmission method and device in cellular communication
  • LAA transmission method and device in cellular communication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Embodiment 1 illustrates the flow chart of downlink transmission, as attached figure 1 shown. attached figure 1 In , base station N1 is the serving base station of UEU2.

[0092] For the base station N1, in step S11, monitor in the first time window of the first carrier to determine to send useful signals in the current subframe of the first carrier; in step S12, send the first signaling indication on the second carrier N symbols used to transmit useful signals in the current subframe of the first carrier; in step S13, the first useful signal is sent in the current subframe of the first carrier, and the first useful signal occupies the N symbols.

[0093] For UEU2, in step S21, the first signaling is received on the second carrier to determine the N symbols used to transmit useful signals in the current subframe of the first carrier; in step S22, in the current subframe of the first carrier The subframe receives the first useful signal.

[0094] In Embodiment 1, the...

Embodiment 2

[0101] Embodiment 2 illustrates the timing diagram of LBT based on LBE, as attached figure 2 shown. attached figure 2 In , the slash marks the first time window, the backslash marks the second time window, and the cross line marks the transmission resource of the useful signal.

[0102] The base station first monitors in the first time window of the first carrier to determine that a useful signal is sent in the current subframe of the first carrier; then sends the first signaling to the UE on the second carrier to indicate the current subframe of the first carrier N symbols used to transmit useful signals; finally, the first useful signal is sent to the UE in the current subframe of the first carrier, and the first useful signal occupies the N symbols.

[0103] In Embodiment 2, the first signaling is physical layer signaling, the first carrier is deployed on an unlicensed spectrum, and the second carrier is deployed on a licensed spectrum, and N is a positive integer not g...

Embodiment 3

[0108] Embodiment 3 illustrates a schematic diagram of mapping useful signals to physical resources in a PRBP (PhysicalResourceBlockPair, physical resource block pair), as shown in the attached image 3 shown. attached image 3 In , cross lines indicate DMRS, slashes indicate CSI-RS, thick lines indicate CRS, blanks indicate PDSCH, and squares indicated by backslashes are symbols that cannot be used to transmit useful signals.

[0109]The base station sends a useful signal in a current subframe on a carrier of an unlicensed spectrum, where the useful signal occupies N symbols, and the current subframe is configured as a normal CP.

[0110] As a sub-embodiment 1 of Embodiment 3, the N symbols are the last M2 symbols of the current subframe, and the M2 is an element in the positive integer set Z2, and the Z2 includes {11, 12, 13, 14}. The useful signals include PDSCH, DMRS, and CSI-RS, wherein DMRS and CSI-RS completely reuse the physical resource mapping scheme of existing L...

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Abstract

The invention provides an LAA transmission method and an LAA transmission device in cellular communication. The LAA transmission method comprises the steps that: step 1, a base station monitors in a first time window of a first carrier to determine to send useful signals at a current subframe of the first carrier; step 2, the base station sends a first signaling on a second carrier for indicating N symbols used for transmitting the useful signals in the current subframe of the first carrier; step 3, and the base station sends the first useful signal in the current subframe of the first carrier, wherein the first useful signal occupies the N symbols. According to the LAA transmission method and the LAA transmission device, the LTE LAA can maintain fairness identical to that of Wifi, the air interface resource is fully utilized, and the LAA transmission method and the LAA transmission device maintain compatibility with an LTE system as far as possible.

Description

technical field [0001] The present invention relates to a communication scheme using unlicensed spectrum in a wireless communication system, in particular to a method and device for subframe structure based on LTE (Long Term Evolution, Long Term Evolution) unlicensed spectrum (Unlicensed Spectrum). Background technique [0002] In the traditional 3GPP (3rdGenerationPartnerProject, Third Generation Partnership Project) LTE system, data transmission can only occur on the licensed spectrum. However, with the rapid increase of business volume, especially in some urban areas, the licensed spectrum may be difficult to meet the business volume. demand. The 62nd plenary meeting of 3GPPRAN discussed a new research topic, that is, research on unlicensed spectrum synthesis (RP-132085), the main purpose of which is to study the non-standalone (Non-standalone) deployment of LTE using unlicensed spectrum, the so-called non-standalone Independence means that the communication on the unlic...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04L27/26
Inventor 张晓博
Owner SHANGHAI LANGBO COMM TECH CO LTD