ACK/NACK feedback information transmission method and related equipment

A technology of feedback information and transmission method, applied in the field of ACK/NACK feedback information transmission method and related equipment, can solve the problems such as the inability to guarantee the correct analysis of ACK/NACK and the inconsistent understanding of the number of ACK/NACK feedback bits.

Active Publication Date: 2018-02-23
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The embodiment of the present invention provides an ACK/NACK feedback information transmission method and related equipment to solve the problem that in the existing

Method used

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  • ACK/NACK feedback information transmission method and related equipment
  • ACK/NACK feedback information transmission method and related equipment
  • ACK/NACK feedback information transmission method and related equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0278] The terminal only works on one carrier, and the base station side schedules a total of 8 downlink short TTI transmissions to perform ACK / NACK feedback at the same time. The downlink control channel corresponding to each downlink short TTI transmission contains 2 bits of DAI, and DAI is used as The time-domain counter (counter), the value exceeding 4 is indicated in a modulo 4 way.

[0279] Specifically, when receiving at the terminal side, the packet is lost at the second downlink short TTI, but it can be judged that there is a packet loss at the second downlink short TTI through the continuous DAI counter value, and a NACK is generated for the second downlink short TTI as feedback information. The terminal loses packets in the last downlink short TTI scheduled by the base station, and the terminal cannot judge whether there is packet loss in the future according to the previous scheduling information. Whether to spatially combine to determine ACK / NACK feedback informa...

no. 2 Embodiment

[0302] Such as Figure 6 As shown, the terminal works in the carrier aggregation mode. Assuming that it works on two carriers, the base station schedules a total of 4 downlink short TTI transmissions on carrier 1 and performs ACK / NACK feedback at the same time. Assume that each downlink short TTI The length is the same, both are 7 symbols. The base station schedules a total of 8 downlink short TTI transmissions on carrier 2 and performs ACK / NACK feedback at the same time as the 4 downlink short TTI transmissions on carrier 1. Assume that each downlink short TTI Both have the same length and are 2 symbols. The downlink control channel corresponding to each downlink short TTI transmission contains 2 bits of DAI, and DAI is used as a time domain counter. Values ​​exceeding 4 are cyclically indicated by modulo 4.

[0303] In this specific embodiment, the process of receiving by the terminal is as follows:

[0304] The second downlink short TTI on carrier 1 is lost, but through the ...

no. 3 Embodiment

[0320] Such as Figure 7 As shown, the terminal is in the carrier aggregation mode. Assuming that it is working on 6 carriers, the short TTI transmissions scheduled by the base station on each carrier and requiring ACK / NACK feedback at the same time are as follows Figure 7 As shown, assuming that the length of each downlink short TTI is the same, which is 7 symbols, each downlink short TTI transmission is a single codeword transmission, and the downlink control channel corresponding to each downlink short TTI transmission contains 2 bits C -DAI and 2-bit T-DAI, C-DAI is used as a counter in the frequency domain first and then in the time domain, T-DAI indicates the total number of TTIs scheduled on all carriers up to the current short TTI, C-DAI and T-DAI exceed 4 The value of is circularly indicated by modulo 4, as shown in Table 6 below.

[0321] Table 6 Values ​​of C-DAI and T-DAI

[0322]

[0323] In this specific embodiment, the process of receiving by the terminal ...

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Abstract

The invention discloses an ACK/NACK feedback information transmission method and related equipment, used for solving the problem that in existing mechanisms, correct analysis of an ACK/NACK cannot beensured due to the fact that a terminal and a base station have different comprehension on an ACK/NACK feedback bit number. The method comprises the steps as follows: the terminal determines an ACK/NACK indication message, wherein the ACK/NACK indication message at least comprises the information used for determining the bit number of the ACK/NACK feedback information transmitted by the terminal;the terminal reports the ACK/NACK indication message and an ACK/NACK feedback message corresponding to the ACK/NACK indication message.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an ACK / NACK feedback information transmission method and related equipment. Background technique [0002] 1. Existing LTE frame structure (LTE Rel-8 / 9 / 10 / 11 / 12 / 13) [0003] 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 1 The schematic diagram of the structure of FS1 is shown. On each carrier, a 10ms-length wireless frame contains 10 1ms subframes, and each subframe is divided into two 0.5ms-length time slots. The transmission time of uplink and downlink data transmission The interval (Transmission Time Interval, TTI) is 1 ms. [00...

Claims

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Application Information

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IPC IPC(8): H04L1/18
CPCH04L1/1825H04L1/1858H04L1/1864H04L1/18
Inventor 高雪娟司倩倩潘学明
Owner DATANG MOBILE COMM EQUIP CO LTD
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