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Method for transferring ACK/NACK information

A technology for feeding back information and transmitting data, which is applied in the field of data transmission, and can solve problems such as confusion between ACK/NACK information and UE uplink data, reduced coverage, and reduced downlink throughput

Active Publication Date: 2009-09-30
TD TECH COMM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the eNodeB cannot know which downlink time slot received an error, so the eNodeB will retransmit all the downlink data in the last downlink frame, which will greatly reduce the downlink throughput
If you don’t use 1 bit, you can use multi-bit and high-order modulation such as QPSK, but this will reduce the uplink coverage
And regardless of the 1-bit method, the confusion between ACK / NACK information and UE uplink data caused by DL Grant loss still exists

Method used

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  • Method for transferring ACK/NACK information

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Embodiment Construction

[0035] In order to make the purpose, technical means and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] The basic idea of ​​the present invention is: use some bits in the UL Grant to inform the UE how many positions are reserved in the PUSCH for inserting ACK / NACK, and insert several bits in the PDCCH corresponding to each DL Grant, and inform the UE that the DL Grant The position where the ACK / NACK of downlink data should be inserted.

[0037] figure 1 It is an overall flowchart of the method for transmitting ACK / NACK information in the present invention. Such as figure 1 As shown, the method includes:

[0038] Step 101, when the UE has uplink data to send, the eNodeB carries the ACK / NACK number field in the UL Grant sent to the UE, which is used to notify the UE of the number of positions or bits reserved on the PUSCH for feedback of ACK / NACK information ...

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Abstract

The invention discloses a method for transferring ACK / NACK information, including the steps that an ACK / NACK numerical field carried by eNodeB in UL Grant is used for informing the bit number of the ACK / NACK information obligated on PUSCH by UE; Index information corresponding to each DL Grant on a PDCCH channel and carried by the eNodeB is used for informing the obligated position of the ACK / NACK feedback information of downlink transmission data corresponding to the DL Grant of the UE on the PUSCH; the UE carries the accurately received ACK / NACK information of the downlink transmission data corresponding to all the DL Grants on the appointed obligated position of the PUSCH and judges whether the instance that the DL Grant loses exists, if so, the ACK / NACK information corresponding to the lost DL Grant is set to be NACK, and the eNodeB is informed of the existence of the loss of the DL Grant; and the eNodeB retransfers the corresponding DL Grant and a corresponding downlink data block. The invention can solve the problems of a plurality of ACK / NACK feedbacks on the PUSCH and the loss of the DL Grant on the premise of not lowering the uplink covering range.

Description

technical field [0001] The invention relates to the field of data transmission, in particular to a method for transmitting ACK / NACK information. Background technique [0002] In the Long Term Evolution (LTE) system, the UE's uplink data is transmitted on the Physical Uplink Shared Channel (PUSCH), and in the LTE system, both uplink resource and downlink resource scheduling are controlled by an enhanced base station (eNodeB). When the UE needs to transmit uplink data, it sends an uplink request to the eNodeB, and then the eNodeB sends an uplink response (UL Grant) to the UE to notify the UE of uplink resource scheduling information, thereby specifying resources for transmitting uplink data on the PUSCH for the UE. [0003] If the eNodeB sends downlink data to the UE, the eNodeB notifies the UE of downlink resource scheduling information with a downlink response (DL Grant), and the UE receives the corresponding downlink data block in the current downlink frame according to the...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04W28/04
Inventor 王大飞范晨拉盖施
Owner TD TECH COMM TECH LTD
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