Control method for repeatedly transmitting ACK/NACK and user equipment (UE)

A technique for repeated transmission, user equipment

Inactive Publication Date: 2010-08-11
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, it is stipulated that the ACK/NACK signal fed back for HARQ process 1 must be transmitted only after all the ACK/NACK signals fed back for HARQ process 0 have been transmitted, which results in the ACK/NACK signal fed back for HARQ process 1 No uplink transmission resources available
Furthermore, even if the UE correctly receives the downlink data of HA

Method used

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  • Control method for repeatedly transmitting ACK/NACK and user equipment (UE)
  • Control method for repeatedly transmitting ACK/NACK and user equipment (UE)
  • Control method for repeatedly transmitting ACK/NACK and user equipment (UE)

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Embodiment Construction

[0028] It is clearly defined in the prior art that all ACK / NACK signals of each HARQ process must be completely transmitted, so that even if the base station correctly judges the ACK / NACK signal of the previous process with the same process number and correctly triggers a new HARQ process, the previous process When there are remaining ACK / NACK signals of a process, the uplink subframe transmission resources are still occupied, and the ACK / NACK signals of other HARQ processes cannot be transmitted in time. Based on this, in order to improve the ACK / NACK repetition in the TDD system Transmission mechanism performance, when the UE receives downlink data of a new HARQ process, if it judges that the base station has correctly judged the ACK / NACK signal of the previous process with the same process number, and there is an unsent previous process with the same process number For the remaining ACK / NACK signal of the process, no longer send the remaining ACK / NACK signal of the previous ...

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Abstract

The invention relates to a mobile communication technology and provides a control method for repeatedly transmitting ACK/NACK (Acknowledgement Character/ Negative Acknowledgement) and user equipment (UE), which are used for improving the performance of an ACK/NACK repeated transmitting mechanism. When UE receives downlink data of a new HARQ (Hybrid Automatic Repeat Request) progress for each time, if a base station is judged to have correctly judged an ACK/NACK signal transmitted by last HARQ with the same progress number and rest ACK/NACK signal of the last progress, which is not transmittedwith the same progress number, the rest ACK/NACK signal of the last progress with the same progress number is not transmitted any longer; and the rest ACK/NACK signal of the last progress with the same progress number can be continuously transmitted only when the base station does not correctly judge the ACK/NACK signal of the last progress with the same progress number, so that transmission resource of an uplink subframe can be saved and more ACK/NACK signals of the HARQ progress can obtain transmission opportunity.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a control technology for repeated transmission of ACK / NACK in a TDD system. Background technique [0002] Generally, a user equipment (User Equipment, UE) in a HARQ (Hybrid Automatic Repeat Request: Hybrid Automatic Repeat Request) process feeds back ACK / NACK to the base station only once. Sometimes when the cell coverage radius is large, the reliability of ACK / NACK feedback from users at the edge of the cell cannot be guaranteed, and ACK / NACK errors will cause unnecessary retransmissions or residual HARQ errors. In order to ensure the reliability of edge user ACK / NACK, an ACK / NACK repetition (ACK / NACK Repetition) transmission mechanism is adopted in LTE, so that the same ACK / NACK signal can be repeatedly sent in multiple consecutive uplink subframes, eNB Combine multiple received repeated ACK / NACK signals before making a judgment, which can greatly reduce the probability of AC...

Claims

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Application Information

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IPC IPC(8): H04L1/18
Inventor 徐晓东胡臻平唐海
Owner CHINA MOBILE COMM GRP CO LTD
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