TTI binding based LTE uplink transmission method, LTE base station and LTE system

Abstract

The present invention discloses a TTI binding based LTE uplink transmission method, an LTE base station and an LTE system. The method comprises: the base station setting different transmission time interval (TTI) binding sizes for user terminals in the edge area of a cell according to a channel quality of a wireless channel, wherein the better the channel quality is, the smaller the TTI binding size is, the poorer the channel quality is, the larger the TTI binding size is, and the TTI binding size is the number of the TTIs of a carrying data block; the base station triggering user terminal TTI binding and sending TTI binding configuration information to the user terminal, the TTI binding configuration information containing information about set TTI binding sizes; the user terminal sending PUSCH data information according to the TTI binding configuration information. The technical solution provided in the present invention enhances the coverage capability of physical uplink shared channels in the edge area of the cell.

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 (TTI) of the air interface of the LTE system as 1 ms. However, the use of 1ms TTI makes the user equipment (UE, User Equipment) at the edge of the cell unable to transmit enough information energy in a single TTI,...

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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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