Communication method used for TDD system and apparatus thereof

A communication method and channel technology, applied in the field of communication, can solve problems such as HARQ timing is complex, not very effective, and TDD system delay can be reduced

Active Publication Date: 2017-10-24
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this will affect the timing of hybrid automatic repeat request (HARQ), especially in time division duplex (TDD) systems, the feedback acknowledgment / non-acknowledgement (ACK / NACK) information may be delayed due to uplink and downlink switching , resulting in very complex HARQ timing
In addition, compared to frequency division duplex (FDD) systems, shortening TTI alone is not very effective in reducing delay in TDD systems

Method used

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  • Communication method used for TDD system and apparatus thereof
  • Communication method used for TDD system and apparatus thereof
  • Communication method used for TDD system and apparatus thereof

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Embodiment Construction

[0058] Embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the same numerals may be used for similar components or functional assemblies in the drawings. The accompanying drawings are only intended to illustrate embodiments of the present disclosure. Those skilled in the art can obtain alternative implementations from the following descriptions without departing from the spirit and scope of the present disclosure.

[0059] As used herein, the term "comprising" and its variations may be understood as open-ended terms meaning "including but not limited to". The term "based on" may be understood as "based at least in part on". The term "one embodiment" can be read as "at least one embodiment". The term "another embodiment" may be understood as "at least one other embodiment".

[0060] From the perspective of RAN1, shortening TTI is a way to reduce latency. In the FDD system, the HARQ timin...

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Abstract

Embodiments of the invention provide a communication method used for a TDD system and an apparatus thereof. The TDD system is configured with a channel of a first mode and a channel of a second mode. The channel of the second mode possesses shorter transmission interval time (TTI) compared to the channel of the first mode. The method comprises the following steps of receiving data from a downlink channel of the second mode; and in at least one special subframe, sending transmission confirmation information aiming at received data through using at least one uplink channel of the second mode. The embodiments of the invention provide a corresponding communication method and a method for coordinating different communication modes in the TDD system. Besides, the embodiments of the invention also provide a corresponding apparatus. In the technical scheme, time delay can be effectively reduced and simultaneously uplink and downlink transmission performance of the TDD system can be increased.

Description

technical field [0001] Embodiments of the present disclosure generally relate to the communication field, and in particular, relate to a communication method and device for a TDD system. Background technique [0002] Future mobile communication systems are expected to support high data rate services, and one of the problems they face is transmission delay. In order to reduce the round-trip time delay (RTT), one way is to shorten the transmission time interval (TTI). However, this will affect the timing of hybrid automatic repeat request (HARQ), especially in time division duplex (TDD) systems, the feedback acknowledgment / non-acknowledgement (ACK / NACK) information may be delayed due to uplink and downlink switching , resulting in very complicated HARQ timing. In addition, compared with a frequency division duplex (FDD) system, only shortening the TTI is not very effective for reducing the delay of the TDD system. Therefore, a more reliable and efficient delay reduction sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L5/16
CPCH04L5/0055H04L5/16
Inventor 陈宇仲崇显
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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