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LTE system link enhancement method and device

A link and path loss technology, applied in the field of mobile communications, can solve problems such as increased transmission delay, reduction of uplink signal coverage strength in cells, and data transmission complexity with large processing delay, so as to reduce processing delay and improve uplink coverage , Enhance the effect of coverage effect

Active Publication Date: 2014-10-15
新奇点智能科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the HARQ mode, after receiving the feedback sent last time, it is determined whether to perform the next retransmission, so the transmission delay will be increased, especially for the MTC (Mobile Terminating Call, mobile called) service, according to the requirements of the 3GPP protocol, in order to To expand the coverage range, in the FDD (Frequency Division Duplexing, Frequency Division Duplexing) mode, the data of each channel is reduced by 15dB, so that the coverage strength of the uplink signal of the cell is reduced. Here only the existing HARQ technology is used to achieve enhanced coverage. The effect brings great processing delay and complexity of data transmission

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  • LTE system link enhancement method and device
  • LTE system link enhancement method and device
  • LTE system link enhancement method and device

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Embodiment 1

[0070] refer to figure 1 , which shows a flow chart of Embodiment 1 of a method for link enhancement of an LTE system according to the present invention, which may specifically include the following steps:

[0071] Step 101, the communication terminal performs spread spectrum processing on each physical resource block in the time-frequency domain, and the spread spectrum processing includes time domain spread spectrum processing and / or frequency domain spread spectrum processing.

[0072] After a communication terminal (UE) accesses the LTE network, the base station will select appropriate time-frequency domain resources and allocate them to the UE for uplink data transmission. In the embodiment of the present invention, after allocating uplink resources to the base station, the coverage effect of the uplink signal is enhanced through spread spectrum processing, especially for the communication terminal at the border of the cell, it can improve the system performance in the sc...

Embodiment 2

[0105] refer to figure 2 , which shows a flow chart of Embodiment 1 of a method for link enhancement of an LTE system according to the present invention, which may specifically include the following steps:

[0106] Step 201. Calculate the path loss of the LTE signal between the communication terminal and the base station, and determine the corresponding spreading factor in performing spreading processing on the communication terminal according to the path loss. The spreading factor increases with the increase of the path loss.

[0107] The difference from the previous embodiment is that in this embodiment, different spreading factors can be adaptively allocated according to the LTE signal and the path loss between the current communication terminal and the base station, and different spreading factors can be used for time-consuming domain spreading or frequency domain spreading.

[0108] In the embodiment of the present invention, preferably, calculating the path loss of the...

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Abstract

The invention provides an LTE system link enhancement method and device. The method comprises the steps that spread spectrum processing is performed by aiming at each physical resource block on a time / frequency domain by a communication terminal pin, and spread spectrum processing comprises time domain spread spectrum processing and / or frequency domain spread spectrum processing; multiple continuous transmission time intervals on the time domain are bound and used for transmitting the same data block of uplink data, and each transmission time interval comprises multiple physical resource blocks after spread spectrum processing at the frequency domain; and uplink data transmission is performed on time domain resources after binding. The uplink signal coverage effect can be enhanced by the method so that increasing of transmission time delay is avoided and complexity of data transmission is reduced.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method for enhancing a link of an LTE system and a device for enhancing a link of an LTE system. Background technique [0002] In the LTE (Long Term Evolution, long-term evolution project) system, due to the limitation of the transmission power of the user's communication terminal, if the communication terminal is in a relatively harsh environment (such as a cell boundary), the uplink transmission quality of the communication terminal is difficult to guarantee. For this reason, the HARQ (Hybrid Automatic Repeat Request) retransmission mode is often used to increase the decoding rate of the channel by sending different redundant versions of a transmission data block multiple times to enhance the performance of signal coverage. [0003] In the HARQ mode, after receiving the feedback sent last time, it is determined whether to perform the next retransmission, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L1/18H04L27/26
Inventor 褚红发刘嵘方晓波
Owner 新奇点智能科技集团有限公司