Method and device for automatically retransmitting in LTE (Long Term Evolution)

An automatic retransmission and terminal technology, applied in the field of communication, to simplify the processing complexity, reduce the cost of upgrading and transformation, and realize the effect of automatic data retransmission

Active Publication Date: 2012-10-03
新奇点智能科技集团有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a method and device for automatic retransmission in LTE to solve the problem of realizing automatic data retransmission in the case of large coverage

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  • Method and device for automatically retransmitting in LTE (Long Term Evolution)
  • Method and device for automatically retransmitting in LTE (Long Term Evolution)
  • Method and device for automatically retransmitting in LTE (Long Term Evolution)

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Embodiment

[0062] First, the coverage of the base station is divided into several areas according to the distance between the UE and the base station. In this embodiment as Figure 4 As shown, the area with a radius of less than 100km from the base station is Zone A (Zone A), the area larger than 100km and less than 200km is Zone B (Zone B), and the area larger than 200km is Zone C (Zone C). Of course, the actual zone division can be deployed Situation adjustment.

[0063] For UEs in different zones, different methods are used for the actual timing advance of the UE to send uplink data.

[0064] When the UE is in Zone A, the actual timing advance of the UE is the same as the regular timing advance, and the UE receives the base station's timing advance TA signaling through the PDCCH (Physical Downlink Control Channel). The TA signaling includes the actual time advance of the UE, and the actual time advance value is the same as the conventional time advance value in the prior art. The UE send...

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Abstract

The invention discloses a method and a device for automatically retransmitting in LTE (Long Term Evolution). The method comprises the following steps that: a base station reduces a regular time lead of a terminal according to a distance between the terminal and the base station and obtains the actual time lead of the terminal and informs the terminals; the base station performs resource distribution on each terminal so that resources used by each terminal are not conflicted, and informs the terminals about corresponding distributed resources; and the base station receives reply which is performed by the terminal according to the actual time lead and allocated resources after downlink data is received and sends the downlink data based on a pre-set single-time retransmitting time length according to the replay. By using the method and the device, the problem that the data can be automatically retransmitted under a large covering condition can be solved.

Description

Technical field [0001] The present invention relates to the field of communications, in particular to a method and device for automatic retransmission in LTE. Background technique [0002] In the third-generation long-term evolution system (LTE) of mobile communications, the general cell radius is 14km, and the maximum radius of the cell under wide coverage is 100km. Certain special scenarios, such as covering the airspace of civil aircraft, the sea area of ​​ships and drilling platforms, maglev trains, and high-speed railways, are indispensable parts of future network coverage. These application scenarios are typical systems with limited coverage, so they need Propose an implementable solution that meets the requirement of coverage radius greater than 100KM. [0003] In a mobile communication system, whether it is UE (terminal) for service access or in uplink and downlink services, due to the time-varying characteristics of the wireless channel and the impact of multipath fading ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W16/10
Inventor 宋磊汝聪翀吴群英姜戬
Owner 新奇点智能科技集团有限公司
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