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Hybrid automatic repeat request method used for facilitating uplink transmission and corresponding device

A hybrid automatic repeat and link transmission technology, applied in the direction of error prevention/detection using the return channel, which can solve the problems of conflicts, high uplink grant signaling overhead, inability to support HARQ retransmission, etc., to reduce latency , the effect of reducing implementation complexity

Active Publication Date: 2016-04-20
ALCATEL LUCENT SHANGHAI BELL CO LTD
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Problems solved by technology

In 3GPP conference document R1-133061, it is proposed to use uplink grant (UL-grant) as feedback information to indicate ACK / NACK (positive acknowledgment / negative acknowledgment) feedback for uplink transmission; however, the problem is that the uplink The overhead of permission signaling is too high
Another extreme solution is to only indicate ACK / NACK by feeding back two states through the Physical HARQ Indicator Channel (PHICH), which means that it can only indicate whether to retransmit, without additional signaling to indicate resources for retransmission , that is, it cannot support adaptive HARQ retransmission at all
Non-adaptive HARQ retransmissions may lead to collisions
Considering that CE-MTC communication usually needs to be repeated many times, and thus occupies more resources than normal UE, the probability of the collision may be high, therefore, how to avoid the collision in retransmission is an important issue that needs to be considered

Method used

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  • Hybrid automatic repeat request method used for facilitating uplink transmission and corresponding device
  • Hybrid automatic repeat request method used for facilitating uplink transmission and corresponding device
  • Hybrid automatic repeat request method used for facilitating uplink transmission and corresponding device

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Embodiment Construction

[0027] Exemplary aspects of the invention will be described below. More specifically, exemplary aspects of the invention are described below with reference to specific non-limiting examples and what are presently considered to be conceivable embodiments of the invention. Those skilled in the art will understand that the present invention is by no means limited to these examples, but can be applied more widely.

[0028]It will be noted that the following exemplary description mainly refers to the specifications used in a non-limiting and exemplary network. In particular, cellular communication networks related to 3GPP Long Term Evolution LTE (including LTE-A, also known as LTE-Advanced) are used as an exemplary background for discussing the methods and apparatus to which the present invention relates. Also, the descriptions of example aspects and embodiments given herein refer specifically to terms directly related thereto. Such terms are used only in the context of the non-l...

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Abstract

The invention provides a hybrid automatic repeat request HARQ method used for facilitating uplink transmission. The HARQ method is characterized in that according to the uplink transmission, at least three HARQ feedback states can be defined to indicate a HARQ retransmission mode of the uplink transmission; and at least three HARQ feedback states comprise non-transmission DTX states of HARQ feedback information. The invention also provides a method for executing the HARQ feedback and transmission respectively on a base station and a user equipment according to the at least three HARQ feedback states. The invention also provides a corresponding device.

Description

technical field [0001] The present invention relates to wireless communications, and more particularly to methods and apparatus for facilitating HARQ (Hybrid Automatic Repeat Request) for uplink transmissions in a wireless communications environment. Background technique [0002] With the popularization of various wireless communication technologies, it provides support for communication of more and more types of terminals and devices, for example, supports machine type communication (MTC) devices in addition to commonly used general mobile terminals. Meanwhile, the Internet of Things (IoT) has become an important trend in future communications. As a result, MTC will become one of the most ubiquitous services. Currently, the 3GPP (Third Generation Partnership Project) standardization organization is discussing the MTC technology to be adopted in the future. [0003] An MTC device is a user terminal (UE) used for a specific purpose, and an example of such an MTC device is a...

Claims

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Application Information

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IPC IPC(8): H04L1/18
Inventor 张长陈宇王河
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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