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ACK/NACK feedback method and related devices

A technology of feedback information and channels, applied in the field of communication, can solve the problems of unable to guarantee normal feedback of ACK/NACK, different time positions, etc.

Active Publication Date: 2017-10-03
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The embodiment of the present invention provides an ACK / NACK feedback method and related equipment, which are used to solve the problem that due to the different transmission and processing delays required for data with different TTI lengths, the earliest possible ACK / NACK feedback time positions are different, which cannot be guaranteed. The problem of normal feedback of ACK / NACK for downlink transmission

Method used

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  • ACK/NACK feedback method and related devices
  • ACK/NACK feedback method and related devices
  • ACK/NACK feedback method and related devices

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no. 1 Embodiment

[0295] In this specific implementation, an FDD carrier using a conventional cyclic prefix (Cyclic Prefix, CP) is taken as an example.

[0296] In this specific embodiment, assuming that the last symbol in each uplink subframe in a radio frame can be used to transmit ACK / NACK feedback information, there are 10 time domain positions of ACK / NACK feedback information in a radio frame. The number of bits occupied by the first indication field used to indicate the time domain position of the ACK / NACK feedback information in the DCI is 4, where the correspondence between the first indication field and the indicated time domain position of the ACK / NACK feedback information As shown in Table 4.

[0297] Table 4: Correspondence between the first indication field in DCI and the time domain position of the indicated ACK / NACK feedback information

[0298] first indication field

The value of the first indicator field or the time domain position index

Time domain position o...

no. 2 Embodiment

[0306] In this specific implementation, an FDD carrier using a conventional CP is taken as an example.

[0307] In this specific embodiment, assuming that the last symbol in each even-numbered uplink subframe in a radio frame can be used to transmit ACK / NACK feedback information, then there are 5 symbols of ACK / NACK feedback information in a radio frame Time domain position, the number of bits occupied by the first indication field used to indicate the time domain position of the ACK / NACK feedback information in the DCI is 3, where the difference between the first indication field and the indicated time domain position of the ACK / NACK feedback information The correspondence between them is shown in Table 5.

[0308] Table 5: Correspondence between the first indication field in DCI and the time domain position of the indicated ACK / NACK feedback information

[0309] first indication field

The value of the first indicator field or the time domain position index

...

no. 3 Embodiment

[0325] In this specific implementation, a TDD carrier using TDD uplink and downlink configuration 1 using a conventional CP is taken as an example. Assume that the TDD special subframe is configured as configuration 7 (that is, DwPTS contains 10 symbols, GP contains 2 symbols, and UpPTS contains 2 symbols), assuming that the last symbol in each uplink subframe (including UpPTS) in a radio frame It can be used to transmit ACK / NACK feedback information, and there are 6 time domain positions of ACK / NACK feedback information in one radio frame, that is, subframe #1 / 2 / 3 / 6 / 7 / 8, which is used to indicate ACK in DCI The number of bits occupied by the first indication field of the time domain position of the / NACK feedback information is 3, where the correspondence between the first indication field and the indicated time domain position of the ACK / NACK feedback information is shown in Table 7.

[0326] Table 7: Correspondence between the first indication field in DCI and the time doma...

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Abstract

The invention discloses an ACK / NACK feedback method and related devices and is used for solving the problem that time positions capable of carrying out ACK / NACK feedback at the earliest are different and the normal feedback of ACK / NACK of downlink transmission cannot be ensured due to the fact that the transmission and processing time delay required by data with different sending time interval lengths is different. The method comprises the steps that a terminal receives a first physical downlink control channel, wherein a first indication domain is carried in downlink control information of the first physical downlink control channel, and the first indication domain is used for determining a time domain position of ACK / NACK feedback information; and the terminal determines the time domain position of the ACK / NACK feedback information of the first physical downlink control channel or a first physical downlink shared channel corresponding to the first physical downlink control channel according to the first indication domain and transmits the ACK / NACK feedback information at the time domain position of the ACK / NACK feedback information.

Description

[0001] This application claims the priority of the Chinese patent application with the application number 201610180321.3 and the title of the invention "A ACK / NACK Feedback Method and Related Devices" filed with the China Patent Office on March 25, 2016, the entire contents of which are hereby incorporated by reference In this application. technical field [0002] The present invention relates to the field of communication technology, in particular to an ACK / NACK feedback method and related equipment. Background technique [0003] 1. Existing LTE frame structure (LTE Rel-8 / 9 / 10 / 11 / 12 / 13) [0004] An existing Long Term Evolution (Long Term Evolution, LTE) frequency division duplex (Frequency Division Duplex, FDD) system uses a frame structure type 1 (Frame Structure Type 1, FS1 for short). In the FDD system, different carrier frequencies are used for uplink and downlink transmission, and the same frame structure is used for uplink and downlink transmission. Such as figure ...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L5/00
CPCH04L1/1607H04L5/0055H04L5/0058H04L1/18H04L1/1854H04L1/1861H04L5/0091H04L5/001H04L5/0082H04L5/14H04L1/1896H04W72/0446H04W72/23H04L5/00H04W72/04
Inventor 高雪娟郑方政
Owner DATANG MOBILE COMM EQUIP CO LTD
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