Control method, control system, transmitting end device and receiving end device for hybrid automatic repeat request

A technology of hybrid automatic retransmission and control methods, which is applied in the direction of error prevention/detection, network traffic/resource management, electrical components, etc. using return channels, and can solve the problem of inability to realize the relay link asynchronous HARQ retransmission control indication, asynchronous HARQ control has no effective solution, does not include and other problems, and achieves the effect of improving utilization flexibility and fairness guarantee

Active Publication Date: 2010-07-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] If the uplink asynchronous HARQ control is used on the relay link, when the base station receives the RS signal and decodes it incorrectly, it needs to feed back a NACK message to the RS and send a UL Grant message. If the UL Grant message similar to the uplink synchronous HARQ control of the access link is used Since the UL Grant message does not include the control indication information for the subframe where the allocated uplink retransmission resource is located, when asynchronous HARQ retransmission is performed, there is no unique fixed relationship between the uplink retransmission resource and the NACK message Subframe interval, therefore, in this case, it will result in: adopting the control format similar to the UL Grant message of the uplink synchronous HARQ control of the access link, the retransmission control indication of the uplink asynchronous HARQ of the relay link cannot be realized
Currently, there is no effective solution for uplink asynchronous HARQ control of relay links

Method used

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  • Control method, control system, transmitting end device and receiving end device for hybrid automatic repeat request
  • Control method, control system, transmitting end device and receiving end device for hybrid automatic repeat request
  • Control method, control system, transmitting end device and receiving end device for hybrid automatic repeat request

Examples

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Embodiment 1

[0049] When the uplink asynchronous HARQ is adopted in the relay network, after the RS obtains the control indication information of the subframe where the allocated uplink retransmission resource is located from the UL Grant message, the RS retransmits the uplink data according to the configuration of the uplink retransmission by the UL Grant. This embodiment of the method adopts the above-mentioned first control instruction manner.

[0050] In the embodiment of this method, the relay system configuration has four situations in which there are 4, 5, 6 or 7 subframes in the number of interval subframes between the downlink subframe and the uplink subframe of the relay link, that is, the downlink subframe where the NACK message is located There are the above four cases of the number of interval subframes between the frame and the subframe where the allocated uplink retransmission resources are located, and the corresponding control indication information is configured as 2 bits,...

Embodiment 2

[0059] The above-mentioned second control instruction manner is used to control the retransmission of the uplink HARQ on the relay link.

[0060] Here, it is assumed that according to the system configuration, the control indication information included in the UL Grant is 3 bits, and Table 2 is a relationship table between the control indication information and its corresponding indication subframe number. In this method embodiment, the implementation flow of the control method of HARQ includes the following steps:

[0061] Step 301, the RS sends uplink data to the base station in the 3rd subframe of the radio frame k, the base station receives the uplink data and decodes it incorrectly, and feeds back a NACK message to the RS in the 7th subframe of the same radio frame, and sends a UL Grant message at the same time.

[0062] Here, the NACK message and the UL Grant message are usually sent in the same subframe. The control indication information used in the UL Grant message t...

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Abstract

The invention discloses a control method for a hybrid automatic repeat request. The method comprises the step of transmitting information of NACK (Negative Acknowledgments) and UL Grant (Uplink Grant) when a base station receives wrong uplink decoded data from an RS (relay station). The UL Grant information comprises control indication information for indicating the base station as a subframe of a repeat resource that the RS allocates. The invention also discloses a control system and a transmitting end device for a hybrid automatic repeat request. A setting unit is used for setting the control indication information which is used for indicating the base station as the subframe of the repeat resource that the RS allocates in the UL Grant information. The invention also comprises a receiving end device for a hybrid automatic repeat request, and the RS realizes transmission of uplink data according to the indication of the control indication information. The employment of the control method, the control system, the transmitting end device and the receiving end device all for a hybrid automatic repeat request can control an uplink asynchronous hybrid automatic repeat request of a relay link.

Description

technical field [0001] The present invention relates to a hybrid automatic repeat request (HARQ, Hybrid Automatic Repeat request) technology, in particular to a HARQ control method, system, and equipment at a sending end and a receiving end in a relay link. Background technique [0002] As an emerging technology, relay technology has attracted more and more attention and is regarded as a key technology of B3G / 4G. Since future wireless communication or cellular systems require perfect network coverage and support for higher rate transmission, this poses new challenges to wireless communication technology. At the same time, the cost of system construction and maintenance is more prominent. With the increase of transmission rate and communication distance, the problem of battery energy consumption has become more prominent, and future wireless communication will use higher frequencies, which will further increase the communication distance and make the resulting path loss atte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/04H04W88/12H04L1/18H04L1/16
Inventor 杨瑾毕峰梁枫袁明吴栓栓
Owner ZTE CORP
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