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A kind of laa scheduling method and device

A subframe and signaling technology, which is applied in the field of communication for unlicensed spectrum, can solve problems such as unguaranteed delay

Active Publication Date: 2019-05-31
SHANGHAI LANGBO COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As another example, a traditional LTE base station uses DCI (Downlink Control Information, downlink control information) format 1A to configure RACH (Random Access Channel, random access channel) pilot (Preamble) parameters to trigger PRACH (Physical Random Access Channel, physical random access Incoming channel) transmission, the PRACH transmission is delayed by at least 6 subframes compared to the corresponding PDCCH (Physical Downlink Control Channel, physical downlink control channel) transmission, and the base station supporting LBT may not be able to guarantee a delay of 6 (or more) subframes Suitable for uplink transmission in the future

Method used

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  • A kind of laa scheduling method and device
  • A kind of laa scheduling method and device
  • A kind of laa scheduling method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Embodiment 1 illustrates the flow chart of uplink transmission on the LAA carrier, as shown in the attached figure 1 shown. attached figure 1 In , the base station N1 maintains the serving cell of the UE U2. The steps in the box where F1 is identified are optional steps.

[0075] For the base station N1, the first signaling and the second signaling are sent in step S11. In step S12, it is judged whether the first subframe belongs to the first COT. If the first subframe belongs to the first COT, in step S120 the wireless signal is received on the first subframe of the first carrier; if the first subframe is a subframe outside the first COT, in step S121 it is assumed (including The target UE of the second signaling including UE U2 maintains zero transmit power on the first subframe of the first carrier.

[0076]For UE U2, the first signaling and the second signaling are received in step S21. In step S22, it is judged whether the first subframe belongs to the first ...

Embodiment 2

[0085] Embodiment 2 illustrates the flow chart of downlink transmission on the LAA carrier, as shown in the attached figure 2 shown. attached figure 2 , the base station N3 maintains the second cell, and the second cell is the serving cell of the UE U4 on the first carrier.

[0086] For the base station N3, in step S31, the first signaling and the second signaling are sent. In step S32, it is judged whether the first subframe belongs to the first COT. If the first subframe belongs to the first COT, in step S320 a wireless signal is sent on the first subframe of the first carrier; if the first subframe is a subframe other than the first COT, in step S321 in the first subframe The zero transmission power of the second cell is maintained on the first subframe of the carrier (that is, the second cell does not transmit radio signals on the first subframe of the first carrier).

[0087] For UE U4, in step S41, the first signaling and the second signaling are received. In step...

Embodiment 3

[0091] Embodiment 3 illustrates the transmission timing diagram, as attached image 3 shown. attached image 3 In , the slashed grid indicates the transmission subframe of the second signaling, and the backslashed grid indicates the subframe in the first COT.

[0092] In Embodiment 3, the first carrier is deployed on the unlicensed spectrum, the second carrier is deployed on the licensed spectrum, the second signaling is transmitted on the second carrier, and the transmission subframe of the second signaling is the first COT (including the subframe S 0 ~ Subframe S K-1 The first subframe of the K subframes (that is, the subframe S 0 ).

[0093] As a sub-embodiment 1 of Embodiment 3, the base station performs subframe S in the first COT on the second carrier 0 The downlink signaling used to indicate the COT on the first carrier may also be sent in subframes other than the subframe. For example, downlink signaling is sent on subframe S1 to indicate a given OCT, and the giv...

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Abstract

The invention proposes an LAA scheduling method and device. In step 1, the UE receives first signaling and second signaling, the first signaling indicates that the first subframe of the first carrier is configured as the first structure, and the second signaling indicates the first COT on the first carrier . In step 2, the UE judges whether the first subframe belongs to the first COT, if the first subframe belongs to the first COT, execute the first operation; if the first subframe is a subframe other than the first COT, execute the second operation operate. Wherein, the first carrier is deployed in an unlicensed frequency spectrum. As an example, the first operation is to receive wireless signals on the first subframe of the first carrier and the second operation is to assume that the serving cell maintains zero transmit power on the first subframe of the first carrier and the first structure is downlink subframe. The present invention enables the LTE LAA after the introduction of the LBT technology to be compatible with traditional downlink semi-static scheduling and long-delayed uplink scheduling, avoiding complex standard changes.

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 (3rd Generation Partner Project, 3rd Generation Partnership Project) LTE system, data transmission can only occur on the licensed spectrum. However, with the rapid increase of traffic, especially in some urban areas, the licensed spectrum may be difficult Meet the needs of business volume. The 62nd plenary meeting of 3GPP RAN 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 unlicensed spectrum, the so-called Non-standalone means that the communication on the unlicensed spectrum should be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/12H04L27/26
CPCY02D30/70
Inventor 张晓博
Owner SHANGHAI LANGBO COMM TECH CO LTD