LAA system communication method and device

A wireless signal and high-level signaling technology, applied in the field of communication for unlicensed spectrum, can solve the problems of affecting PDSCH, losing downlink synchronization and downlink pre-synchronization operation, etc., and achieve the effect of cost saving

Active Publication Date: 2016-06-08
SHANGHAI LANGBO COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In LTELAA, the absence of the downlink RS used for channel measurement on some subframes may seriously affect the receiving performance of PDSCH (PhysicalDownlinkSharedChannel, physical downlink shared channel)
In addition, if the downlink RS cannot be received on a given carrier for a long time, the UE (User Equipment, user equipment) may lose downlink synchronization and cause frequent downlink pre-synchronization operations on the given carrier

Method used

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  • LAA system communication method and device
  • LAA system communication method and device
  • LAA system communication method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1 illustrates the flow chart of downlink transmission on the LAA carrier, as shown in the attached figure 1 shown. attached figure 1 , base station N1 maintains the serving cell of UEU2.

[0072] For base station N1, in step S11, high-level signaling is sent to indicate the following information:

[0073] - First information. Frequency bands of K carriers

[0074] -Second information. The physical resources occupied by each RS resource group in the subframe in the K RS resource groups

[0075] - Third information. The antenna port of the target wireless signal and the K RS resource groups are semi-co-located.

[0076] In step S12, downlink RSs are sent on the K RS resource groups. In step S13, the target wireless signal is sent.

[0077] For UEU2, in step S21, high layer signaling is received to determine the first information, the second information and the third information. In step S22, the downlink RS is received on the K RS resource groups, and th...

Embodiment 2

[0085] Embodiment 2 illustrates the subframe distribution diagram of K RS resource groups, as shown in the attached figure 2 shown. attached figure 2 In , a small square represents a subframe, where the small square with the number i represents the subframe of the i-th RS resource group (i from 1 to K), and the small square marked with a slash means that the base station maintains zero transmit power of subframes.

[0086] The base station first sends high-level signaling to indicate the following information:

[0087] - the first information. The frequency bands of K carriers (attached figure 2 1st carrier to Kth carrier in

[0088] -Second information. The physical resources occupied by each RS resource group in the subframe in the K RS resource groups (the first RS resource group to the Kth RS resource group)

[0089] - Third information. The antenna port of the target wireless signal and the K RS resource groups are semi-co-located.

[0090] Then on the K RS resou...

Embodiment 3

[0097] Embodiment 3 illustrates the structural block diagram of the processing device in the UE, as shown in the attached image 3 shown. attached image 3 Among them, the UE processing device 200 is composed of a receiving module 201 .

[0098] The receiving module 201 is used to receive high-level signaling to determine the following information:

[0099] - First information. Frequency bands of K carriers

[0100] -Second information. The physical resources occupied by each RS resource group in the subframe in the K RS resource groups

[0101] - Third information. The antenna port of the target wireless signal and the K RS resource groups are semi-co-located.

[0102] In Embodiment 3, the K is a positive integer greater than 1, the K RS resource groups respectively belong to the K carriers in the frequency domain, and at least one of the K carriers is deployed in an unlicensed spectrum. The transmission carrier of the target wireless signal is deployed in an unlicensed ...

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Abstract

The invention provides a license assisted access (LAA) system communication method and device. The LAA system communication method comprises a step 1 that user equipment (UE) receives a high-level signal to determine the following information: first information including frequency bands of K carriers, second information including physical resource occupied in a sub-frame by each of K reference signal (RS) resource groups, and third information including that an antenna port of a target wireless signal and the K RS resource groups are co-located, wherein the K represents a positive integer larger than 1, the K RS resource groups respectively belong to the K carriers in the frequency domain, and at least one of the K carriers is configured in an unlicensed spectrum; transmission carriers of the target wireless signal is configured in the unlicensed spectrum. According to the LAA system communication method, on the premise of not increasing downlink RS redundancy costs, channel estimation performances are effectively improved, so that LAA LTE after introduction of the LBT technology keeps the maximum forward compatibility.

Description

technical field [0001] The present invention relates to a communication scheme using unlicensed spectrum in a wireless communication system, in particular to a communication method and device for unlicensed spectrum (Unlicensed Spectrum) based on LTE (Long Term Evolution, Long Term Evolution). 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, the research on unlicensed spectrum synthesis (RP-132085), the main purpose of which is to study the Non-standalone (non-independent) deployment of LTE on the unlicensed spectrum, the so-called Non-standalone -standalone means that the communication on the unlic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00
Inventor 张晓博
Owner SHANGHAI LANGBO COMM TECH CO LTD
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