Data transmission method, data transmission device, base station and user equipment

A data transmission method and data transmission technology are applied in the fields of data transmission methods, devices, base stations and user equipment, and can solve the problems of low resource utilization and discontinuous data transmission.

Active Publication Date: 2016-10-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a data transmission method, device, base station, and user equipment to at least solve the problem of discontinuous data transmission due to resource competition and resource occupation time constraints when using unlicensed carriers for data transmission in related technologies. and low resource utilization

Method used

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  • Data transmission method, data transmission device, base station and user equipment
  • Data transmission method, data transmission device, base station and user equipment
  • Data transmission method, data transmission device, base station and user equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0234] In this preferred embodiment, the base station sends the pre-scheduling signaling to the UE in detail, and only the base station participates in the contention in this embodiment.

[0235] Suppose the base station determines to schedule some UEs on unlicensed carriers, and sends pre-scheduling signaling to some scheduled UEs at the Mth moment before competing for unlicensed resources. The content of the pre-scheduling signaling includes: carrier index, allocated PRB The number and location, UL grant uplink authorization information such as MCS, or subframe index indication information.

[0236] Wherein, the base station determines to send the pre-scheduling signaling to the relevant UE according to the SR (Scheduling Request) or BSR (Buffer Status Report) of the UE or the priority of determining that the UE has data and services and the system resources on the authorized carrier.

[0237] For services with high priority or UEs with large BSR, the base station preferably...

Embodiment 2

[0250] In this preferred embodiment, the specific process of the base station notifying the UE after obtaining resources and the UE performing uplink data transmission according to the pre-scheduling signaling is described in detail.

[0251] The base station notifies the UE of the scheduling signaling before competing for resources, and the UE encodes and modulates the data according to the signaling, while waiting for the result of the resource competition of the base station.

[0252] The base station competes for unlicensed resources according to predefined rules. After obtaining the resource, the base station needs to send transmission indication information to notify the UE, so that the UE can send uplink data after determining that the carrier is available.

[0253] The base station notifies the UE that the resources have been contended for in one of the following ways, that is, the transmission instruction information is carried in the following ways:

[0254] Mode 1: T...

Embodiment 3

[0272] In this preferred embodiment, the method for the base station to trigger the UE to perform resource competition is described.

[0273] The UEs that trigger the contention for unlicensed resources include UEs in an idle state and UEs with a scheduling request SR.

[0274] For SR UE, there are two ways:

[0275] The first one is the predefined cycle method. The UE competes in some unlicensed frequency bands according to a predefined period, such as an SR period, or other configured periods.

[0276] The second type is dynamically triggered through DCI, or triggered through NACK signaling.

[0277] For DCI dynamic triggering methods, there are two types:

[0278] The first method: the UL grant implicit indication method, that is, the UE receiving the UL grant judges whether it is an authorized carrier or an unlicensed carrier according to the carrier indication field. If the scheduled carrier is an unlicensed carrier, resource competition will be performed first.

[02...

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Abstract

The invention discloses a data transmission method, a data transmission device, a base station and user equipment. The method includes the following steps that: a pre-scheduling signal is sent to the UE (user equipment) before non-authorized carriers are obtained through competition, wherein the pre-scheduling signal is used for instructing the UE to carry out data transmission on the non-authorized resources which are obtained through competition; and data transmission with the UE is carried out according to the pre-scheduling signal. With the data transmission method of the invention adopted, the problems of uncontinuous data transmission and low resource utilization rate which are caused by the limitations of resource competition and resource holding time when non-authorized carriers are adopted to carry out data transmission in the prior art can be solved; limited holding time on the non-authorized carriers can be effectively utilized, spectrum efficiency can be improved, and the time delay effect of the data transmission of the non-authorized carriers can be decreased.

Description

technical field [0001] The present invention relates to the communication field, and in particular, to a data transmission method, device, base station, and user equipment (User Equipment, UE for short). Background technique [0002] During the evolution of LTE, the LTE Rel-13 version was launched in September 2014. One of the important contents is that the LTE system uses unlicensed carriers to work. This technology will enable the LTE system to use existing unlicensed carriers, greatly enhance the potential spectrum resources of the LTE system, and enable the LTE system to obtain lower spectrum costs. [0003] However, LTE faces many problems when using unlicensed carriers for data transmission, some of which are as follows: [0004] In the unlicensed spectrum, in addition to the LTE / LTE-A system, there are other systems such as WiFi and radar (Radar). For fairness, each system needs to use a competitive method to obtain resources, and needs to be released after a period ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12H04W74/08
CPCH04W72/12H04W72/1215H04W74/0808H04W52/0216Y02D30/70H04W72/23H04L5/0055H04L5/14H04W72/121
Inventor 李新彩苟伟毕峰彭佛才杨玲
Owner ZTE CORP
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