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A communication method and device in an unlicensed frequency band

A technology for signaling and scheduling information, applied in the communication field for unlicensed spectrum, can solve problems such as large scheduling restrictions, and achieve the effect of avoiding different understandings

Active Publication Date: 2019-04-26
SHANGHAI LANGBO COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] An intuitive idea is to reuse the existing eIMTA technology on the unlicensed spectrum. However, the inventor found through research that the existing eIMTA technology supports switching between TDD frame structures #0-#6, which brings greater scheduling limit

Method used

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  • A communication method and device in an unlicensed frequency band
  • A communication method and device in an unlicensed frequency band
  • A communication method and device in an unlicensed frequency band

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] Embodiment 1 illustrates the flow chart of transmitting downlink data on the unlicensed spectrum, as shown in the attached figure 1 shown. attached figure 1 In, the base station N1 is the serving base station of the UE U2, and steps S11 and S21 are optional steps.

[0120] for base station N1 , in step S12, send the first signaling on the first carrier to indicate the first frame structure, the first frame structure is the frame structure of the second carrier in the configured time window; in step S13, send the second signaling to indicate Scheduling information for the first subframe on the second carrier; in step S14, sending physical layer data and receiving corresponding ACK / NACK or receiving physical layer data and sending corresponding ACK / NACK according to the scheduling information, the physical Layer data is transmitted in the first subframe on the second carrier.

[0121] for UE U2 , in step S22, receive the first signaling on the first carrier to obta...

Embodiment 2

[0133] Embodiment 2 illustrates the HARQ timing diagram for scheduling unlicensed spectrum, as shown in the attached figure 2shown. attached figure 2 Among them, the transmission carrier of the second signaling is a TDD carrier, the second signaling is an uplink scheduling signaling, the intra-frame index of the first subframe corresponds to the uplink subframe in the first frame structure, and the first, second, and third time windows There are three frame structure reconfiguration time windows respectively, and the frame structures of the second carrier in the first, second, and third time windows are respectively configured as frame structures S1, S2, and S3.

[0134] For the base station, first, the first signaling is sent on the first carrier to indicate the first frame structure (ie, frame structure S2), and the first frame structure is the frame structure of the second carrier in the configuration time window (ie, the second time window); Then send the second signal...

Embodiment 3

[0146] Embodiment 3 illustrates the HARQ timing diagram for scheduling unlicensed spectrum, as shown in the attached image 3 shown. attached image 3 Among them, the transmission carrier of the second signaling is the FDD carrier, the second signaling is the downlink scheduling signaling, the intra-frame index of the first subframe corresponds to the downlink subframe in the first frame structure, and the first, second and third time windows There are three frame structure reconfiguration time windows respectively, and the frame structures of the second carrier in the first, second, and third time windows are respectively configured as frame structures S1, S2, and S3.

[0147] For the base station, first, the first signaling is sent on the first carrier to indicate the first frame structure (ie, frame structure S2), and the first frame structure is the frame structure of the second carrier in the configuration time window (ie, the second time window); Then send the second s...

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Abstract

The present invention provides a communication method on an unauthorized frequency band and a device. Aiming at the problem of dispatch limitation of the conventional enhanced interference management traffic adaptation (eIMTA), user equipment (UE) receives a physical layer signaling and acquires a first frame structure on an authorized spectrum, the first frame structure is any frame structure in a target frame structure set, and the target frame structure set comprises at least one type of frame structure in {all uplink frame structures, all downlink frame structures}. According to one embodiment, a base station dynamically selects from time division duplex (TDD) frame structures and frequency division duplex (FDD) frame structures and configures the frame structure on an unauthorized spectrum, thereby realizing larger dispatch flexibility than the conventional eIMTA. Furthermore, redundancy expenditure caused by a guard period (GP) in the TDD frame structures can be reduced. Carrier aggregation (CA) and eIMTA schemes in the conventional long term evolution (LTE) are reused as far as possible, and thus excellent compatibility is realized.

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] 3GPP (3rd Generation Partner Project, third generation partnership project) defines the TDD (Time Division Duplex, Time Division Duplex) frame structure in the LTE system, as shown in Table 1, where D represents the downlink subframe, U represents the uplink subframe frame, S is a special subframe: [0003] Table 1: TDD LTE frame structure [0004] [0005] 3GPP R (Release, version) 12 introduced eIMTA (enhanced Interference Management Traffic Adaptation, enhanced interference management service adaptation) technology, that is, for the TDD frame structure, the TDD frame structure can be adjusted through dynamic signaling, and the possible TDD frame str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04W16/14
Inventor 张晓博
Owner SHANGHAI LANGBO COMM TECH CO LTD
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