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Data transmission method and device

A data transmission method and data transmission technology are applied in the field of data transmission methods and devices, and can solve the problem that authorized spectrum resources cannot fully satisfy users, etc.

Active Publication Date: 2016-04-13
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the continuous growth of mobile data traffic, the existing licensed spectrum resources are gradually unable to fully meet the needs of users, and the LTE system has begun to consider deploying transmission on unlicensed spectrum resources.

Method used

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  • Data transmission method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0194] Embodiment 1 of the present invention: the situation of constructing a virtual cell by FDD carrier

[0195] The network device configures the carrier aggregation configuration information for the terminal, which is the configuration information of a primary cell and the configuration information of a virtual cell, wherein the primary cell is an FDD cell, and the virtual cell includes three FDD cells working on unlicensed frequency bands. They are named LTE-UCell-1, LTE-UCell-2, and LTE-UCell-3 respectively.

[0196] The terminal maintains a HARQ entity for the primary cell and the secondary cell respectively. The uplink works on the primary cell, and the downlink works on the primary cell and the virtual cell; the terminal on the virtual cell can only pass through LTE-UCell-1 and LTE-UCell at the same time. -2. A cell in the LTE-UCell-3 performs reception and processing of downlink services.

[0197] The network device can simultaneously configure the working mode on t...

Embodiment 2

[0207] Embodiment 2 of the present invention: the situation of constructing a virtual cell by a TDD carrier

[0208] The network device configures the carrier aggregation configuration information for the terminal, which is the configuration information of a main cell and the configuration information of a virtual cell, where the main cell is a TDD cell or FDD cell, and the virtual cell includes three TDD cells, named respectively LTE-UCell-1, LTE-UCell-2, and LTE-UCell-3 work in unlicensed frequency bands.

[0209] Wherein, the network device may configure the virtual cell for downlink transmission only, or configure the virtual cell for uplink and downlink transmission.

[0210] (1) When the network device configures the virtual cell for downlink transmission only, the data transmission situation is as follows:

[0211] The terminal maintains a HARQ entity for the primary cell and the secondary cell respectively, the uplink works on the primary cell, and the downlink works ...

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Abstract

The embodiment of the invention discloses a data transmission method and device. According to the method, a virtual cell comprising a plurality of cells can be configured, and a time division multiplexing manner is adopted among the cells for data transmission, so that the transmission carrier wave of a terminal service can be adjusted flexibly. Particularly, under a condition that transmission is deployed on an unauthorized spectrum resource, a plurality of cells which work on an unauthorized frequency band are aggregated into the virtual cell, and the time division multiplexing manner is adopted among the cells for data transmission, so that interference in different frequency domains can be reduced, thereby improving the system transmission efficiency.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method and device. Background technique [0002] The peak rate of the Long Term Evolution (LTE Advanced, LTE-A) system is much higher than that of the Long Term Evolution (LTE) system, and is required to reach 1 Gbps downlink and 500 Mbps uplink. At the same time, the LTE-A system requires good compatibility with the LTE system. Based on the needs of increasing the peak rate, being compatible with the LTE system, and making full use of spectrum resources, the LTE-A system introduces a carrier aggregation (CarrierAggregation, CA) technology. [0003] The carrier aggregation technology enables user equipment to work simultaneously on multiple cells, and one cell includes a pair of UL / DL component carriers (Component Carrier, CC). In the carrier aggregation system, each component carrier can be continuous or discontinuous, and the bandwidth betwe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04W72/08H04W72/12H04W72/54
CPCH04L5/00H04W52/365H04W52/40H04W72/0446H04L1/1822H04W16/14H04W16/32H04W36/0058H04W72/54H04W36/302H04W16/00H04W24/08H04W72/12
Inventor 许芳丽鲍炜王彦
Owner DATANG MOBILE COMM EQUIP CO LTD
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