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Communication method and device in unlicensed spectrum

An unlicensed frequency band, unlicensed technology, applied in the field of communication in the unlicensed frequency band, to achieve the effect of improving data transmission efficiency, reducing user delay, and enhancing tolerance

Active Publication Date: 2017-07-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a method and device for communicating in an unlicensed frequency band, aiming to solve the HARQ and RLC retransmission problems generated when communicating in an unlicensed frequency band, and improve data transmission efficiency

Method used

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  • Communication method and device in unlicensed spectrum
  • Communication method and device in unlicensed spectrum
  • Communication method and device in unlicensed spectrum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] see figure 1 , propose a method for communicating on an unlicensed frequency band in the first embodiment of the present invention, including the following steps:

[0063] S11. The base station and the user equipment establish a data service carried on an unlicensed carrier.

[0064] The base station is preferably an Evolved Universal Terrestrial Radio Access Network (Evolved Universal Terrestrial Radio Access Network, EUTRAN), and the user equipment is preferably a mobile terminal such as a mobile phone or a tablet computer. The process of establishing the data service carried by the base station and the user equipment on the unlicensed carrier is the same as that of the prior art, and will not be repeated here.

[0065] S12. The base station and the user equipment perform data transmission. During the data transmission process, the base station judges whether the unlicensed carrier generates contention congestion, and when the contention congestion occurs, step S13 ...

Embodiment 2

[0078] see figure 2 , image 3 , a method for communicating on an unlicensed frequency band in the second embodiment of the present invention is proposed. This embodiment takes the transmission of downlink data through an unlicensed carrier as an example. In this embodiment, the base station is preferably EUTRAN, and UE represents user equipment. The method includes the following step:

[0079] S21. The EUTRAN and the UE establish a data service carried on an unlicensed carrier.

[0080] In this step S21, the UE and the EUTRAN establish a downlink service bearer on an unlicensed carrier.

[0081] S22. Before sending downlink data to the UE, the EUTRAN initiates a downlink LBT on the unlicensed carrier to compete for unlicensed carrier resources. When the downlink LBT successfully competes for unlicensed carrier resources, step S23 is executed.

[0082] The downlink data to be sent may be new data received by the EUTRAN that needs to be sent to the UE, or HARQ retransmissi...

Embodiment 3

[0112] see Figure 4 , Figure 5 , the method for communicating on an unlicensed frequency band according to the third embodiment of the present invention is proposed. In this embodiment, the uplink data transmission is performed through an unlicensed carrier in a main carrier scheduling manner. In this embodiment, the base station is preferably EUTRAN, and UE represents user equipment , the method includes the following steps:

[0113] S31. The EUTRAN and the UE establish a data service carried on an unlicensed carrier.

[0114] In this step S31, the UE and the EUTRAN establish uplink service bearers on unlicensed carriers.

[0115] S32, EUTRAN initiates measurement control to the UE, requiring the UE to measure NumLBT ULFailure or / and LBT ULTime , and configure corresponding reporting events according to the measurement results.

[0116] Specifically, the EUTRAN end initiates measurement control to the UE side, and the EUTRAN sends the RRCConnectionReconfiguration messa...

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Abstract

The invention discloses a communication method and device in an unlicensed spectrum. The method comprises the steps that a base station and user equipment (UE) establish a data service carried by a unlicensed carrier; the base station determines whether or not the unlicensed carrier generates competitive congestion in a data transmission process between the base station and the UE; when the unlicensed carrier generates the competitive congestion, the base station increases the maximum number of retransmission times of a hybrid automatic repeated request (HARQ) or increases the timing length of a RLC retransmission polling timer. Thus, the method uses fast retransmission of the HARQ as much as possible, enhances the tolerance of the RLC retransmission, avoids excessive unnecessary retransmission of an RLC layer just due to untimely acquisition of a unlicensed carrier resource, solves HARQ and RLC retransmission problems generated during communication in the unlicensed spectrum, shortens user delay and improves data transmission efficiency.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method and device for communication in an unlicensed frequency band. Background technique [0002] With the surge of mobile Internet traffic, the load on operators' existing 3G and 4G networks continues to increase, and there is an urgent need to expand network capacity. However, there is a serious shortage of existing spectrum resources. The relevant licensed frequency bands, especially the high-value low-frequency band resources, are not only limited, but also rapidly consumed by the rapidly growing user base and mobile Internet services. [0003] At present, the 5GHz unlicensed frequency band still has a considerable portion of available spectrum, and operators and equipment manufacturers are seeking ways to make full use of this frequency band to increase the capacity of the entire network. In the R13 (Release 13) standard developed by the 3rd Generation Part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W24/02
CPCH04L1/1812H04L1/1848H04L1/188H04W24/02H04W72/00
Inventor 刘壮
Owner ZTE CORP
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