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Method for determining feedback codebook, terminal device, and network device

A technology for terminal equipment and equipment, applied in the field of feedback codebook determination, can solve problems such as scenarios where one DCI is not considered to schedule multiple time units, and achieve reduction of DCI indication overhead and UCI feedback overhead, flexible time unit aggregation configuration, Avoid understanding inconsistent effects

Active Publication Date: 2019-02-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since in traditional downlink communication systems, one DCI schedules one time unit, the existing technical solutions do not consider the scenario where one DCI schedules multiple time units. After introducing multi-time unit scheduling or time unit aggregation, how to design HARQ Feedback information to ensure that the sending end and the receiving end understand the same (including the number of bits of the feedback information and the decoding result of the data on the time unit corresponding to each bit number) under the support of flexible time unit number aggregation, avoid confusion, and ensure Communication reliability and robustness are an urgent problem to be solved

Method used

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  • Method for determining feedback codebook, terminal device, and network device
  • Method for determining feedback codebook, terminal device, and network device
  • Method for determining feedback codebook, terminal device, and network device

Examples

Experimental program
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Embodiment 1

[0201] Such as figure 2 As shown, this application provides a method for determining feedback information, which is suitable for figure 1 The system architecture shown consists of the following steps

[0202] Step 201, the base station sends control information, the control information includes: time unit aggregation information and downlink allocation index DAI indication information, and the DAI indication information includes at least one of the following: total downlink allocation index T-DAI indication information and a counter Type downlink allocation index C-DAI indication information.

[0203] In the embodiment of the present application, the time unit aggregation information and the downlink allocation index DAI indication information included in the above control information sent by the base station to the terminal device may be delivered through a piece of control information, for example: both are delivered through DCI, or Two pieces of control information respe...

Embodiment 2

[0295] Since the base station can also configure one or more bandwidth parts (bandwidthpart, BWP) on a carrier for the terminal device, each BWP corresponds to a numerology, such as subcarrier spacing, cyclic prefix (Cyclic Prefix, CP) and other parameters. Therefore, in a possible implementation of the present application, the feedback information may be determined according to the BWP configured on the carrier that is activated or can be activated simultaneously.

[0296] Specifically, there are 2 ways. The first is a dynamic codebook approach, and the second is a semi-static codebook approach.

[0297] The dynamic codebook method can be embodied as Figure 10 As shown in the process, the specific steps of the process may be:

[0298] Step 1001, the receiving end device acquires the control information sent by the sending end device, the control information includes BWP information and DAI information, at least including at least one of the following: T-DAI indication info...

Embodiment 3

[0311] In this embodiment, feedback information is determined according to time window information and time unit format information (slot format information, SFI). As an implementation manner, the time window information may be determined by a configured set of possible values ​​of K1, and the SFI is carried in high-level signaling (such as RRC signaling), and / or physical layer signaling (such as group common DCI).

[0312] In the NR system, in order to support flexible and dynamic TDD, the DL / UL transmission direction of each time unit (slot, symbol, etc.) can be configured through high-layer signaling and / or physical layer groupcommon DCI. One possible implementation is to configure a period, such as 5ms / 10ms as the period; in this period, some fixed resources / time units can be configured for UL transmission, and some fixed resources / time units can be configured for DL ​​transmission. Some reserved resources can also be configured; the remaining resources / time units in the p...

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Abstract

The invention discloses a method for determining a feedback codebook, a terminal device, and a network device. The method comprises the steps: enabling a receiving end device to obtain time unit aggregation information and DAI indication information transmitted by a transmitting end device, and determining the feedback information of at least one transmission block according to the time unit aggregation information and DAI indication information; finally transmitting the feedback information of at least one transmission block to the transmitting end device. The method can improve a mode that an NR system determines the HARQ feedback information, so as to support a scenario of the aggregation or dispatching of a flexible number of time units, thereby preventing the terminal device and the base station for understanding the HARQ feedback information inconsistently and wrongly while guaranteeing the downlink control overhead and uplink feedback overhead.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a method for determining a feedback codebook, a terminal device, and a network device. Background technique [0002] Downlink physical layer data in a long term evolution (long term evolution, LTE) system is respectively carried by a physical downlink shared channel (physical downlink shared channel, PDSCH). In order to ensure reliability and transmission efficiency of physical layer data transmission, LTE adopts hybrid automatic repeat request (hybrid automatic repeat request, HARQ). The basic principle of HARQ is that the receiving end feeds back the decoding result of the data received from the sending end to the sending end. When the decoding is correct, the feedback decoding result is an acknowledgment answer (acknowledgment, ACK), otherwise the feedback decoding result is a negative answer ( negative acknowledgment, NACK). After receiving the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L1/18H04W72/12
CPCH04L1/1812H04L1/1858H04L5/001H04L5/0055H04L5/0057H04W72/23H04L1/1861H04L1/1854H04L1/1864Y02D30/70H04W72/231H04L1/1896H04W72/232H04W72/21
Inventor 彭金磷汪凡唐浩王轶
Owner HUAWEI TECH CO LTD
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