LTE uplink transmission method, base station and system based on tti bonding

Abstract

The invention discloses an LTE uplink transmission method, base station and system based on TTI binding. The method includes: the base station sets different transmission time interval TTI bundling sizes for user terminals at the edge of the cell according to the channel quality of the wireless channel, wherein the better the channel quality, the smaller the TTI bundling size and the worse the channel quality , the larger the TTI binding size is; the TTI binding size is the number of TTIs carrying data blocks; the base station triggers the user terminal TTI binding, and sends TTI binding configuration information to the user terminal, and the TTI binding configuration information includes the set The TTI binding size information; the user terminal sends PUSCH data information according to the TTI binding configuration information. Through the technical solution provided by the invention, the coverage capability of the cell edge physical uplink shared channel is enhanced.

Description

Technical field [0001] The present invention relates to the field of wireless communication, and in particular to an LTE uplink transmission method, base station and system based on TTI binding. Background technique [0002] With the development of wireless communication technology, the performance of mobile terminals has also been continuously improved, prompting the demand for high-speed services based on the mobile Internet to become more and more obvious. For example, in uplink transmission, medium-rate service transmission with an edge rate of 384 kbps as an example becomes one of the services that must be guaranteed by the wireless air interface. In order to reduce the end-to-end delay, the Long Term Evolution (LTE) standard defines the transmission time interval (Transmission Time Interval, TTI) of the air interface of the LTE system as 1 ms. However, with the 1ms TTI, the user equipment (terminal) (UE, UserEquipment) at the edge of the cell cannot transmit enough informa...

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Problems solved by technology

[0007] However, the above-mentioned TTI bundling of the existing version of LTE must be done in units of 4 TTIs, that is, the bundling size is fixed at 4 TTIs

However, for UEs in different locations of the cell, the communication channel quality will be different, and the fixed TTI bundling size cannot well match the different channel qualities of UEs.

For example, when the channel quality of an edge UE is relatively good, bundling 4 TTIs will waste resources and reduce system efficiency; when the channel quality of an edge UE is particularly poor, bundling 4 TTIs still cannot Ensure correct demodulation of UE data

It can be seen that the existing solutions cannot enhance the coverage of the physical uplink shared channel at the cell edge

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