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Method and device for determining downlink control information

A technology for controlling information and user equipment, applied in the field of communications

Active Publication Date: 2021-12-28
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] An object of the embodiments of the present invention is to provide a method and device for determining downlink control information to solve the problem of how to determine the DCI size budget

Method used

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  • Method and device for determining downlink control information
  • Method and device for determining downlink control information
  • Method and device for determining downlink control information

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0143] The DCI size budget of the UE in one slot on the PCell is 4, and SCell information is scheduled across carriers on the PCell.

[0144] If 7 SCells are configured, the DCI size budget of the PCell increases by 4 for each additional SCell, then the DCI size budget of the PCell=4+4×7=32, see Figure 7 .

example 2

[0146] The DCI size budget of the UE in one slot on the PCell is 4, and SCell information is scheduled across carriers on the PCell.

[0147] When the number of SCells configured with cross-carrier scheduling is greater than 4, the DCI size budget increases non-linearly. The number of increases is smaller than that in the case of linear growth.

[0148] When the base station configures 2 SCells for the UE, the DCI size budget of the cell (PCell) carrying the cross-carrier scheduling DCI increases by 2 sizes for each SCell configured by the base station. The DCI size budget of the UE on the PCell is 4+2×2=8.

[0149] When the base station configures 7 SCell(s) for the UE, the UE can add up to 4 SCell DCI sizes on the PCell, which is 2×4=8 DCI sizes. The DCI size budget of the UE in a slot is 4+8=12, see Figure 8 and Figure 9 .

example 3

[0151] The base station configures the SCell for the UE, and the PCell bears the DCI of the SCell cross-carrier scheduling. When the DCI size budget is not enough, the DCI sizes carried on the same cell are aligned, including: DCI size alignment for self-scheduling and DCI size alignment for cross-carrier scheduling:

[0152] (1) The DCI size of DCI format 0-0 or DCI format 1-0 in the USS in the PCell is aligned with the DCI size of DCI format 0-0 or DCI format 1-0 in the CSS.

[0153] (2) If the DCI size budget is still insufficient, align the fallback DCI size in the USS:

[0154] a) The DCI sizes of the self-scheduled and cross-carrier scheduled DCI format 0_1 ​​in the USS are aligned;

[0155] b) The DCI sizes of self-scheduled and cross-carrier scheduled DCI format 1_1 in the USS are aligned.

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Abstract

Embodiments of the present invention provide a method and device for determining downlink control information. The method includes: determining the first number of SCells or the second number of SCells scheduled across carriers; Quantity, the scheduling serving cell is a cell that carries the DCI of the cross-carrier scheduling of the scheduled cell and the self-scheduling DCI of the cell; according to the first number or the second number, determine the increased DCI of the scheduling serving cell A fourth quantity of size budget; according to the third quantity and the fourth quantity, determine the DCI size budget of the scheduling serving cell. In the embodiment of the present invention, the DCI size budget can be determined in the CA scenario, so that the UE can obtain the corresponding DCI size, and perform blind detection on the self-scheduled DCI format and the cross-carrier scheduled DCI format in the scheduling serving cell.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular to a method and device for determining downlink control information (Downlink Control Information, DCI) in a carrier aggregation (CarrierAggregation, CA) scenario. Background technique [0002] With the development of mobile communication technology, more and more technologies for improving communication efficiency have been introduced. For example: [0003] 1. About carrier aggregation: [0004] In the carrier aggregation scenario, the user equipment (User Equipment, UE) can be configured with one primary cell PCell (Primary Cell, PCell), multiple secondary cells (Secondary Cell, SCell), and the new radio (New Radio, NR) can support up to Carrier aggregation of 16 cells. [0005] If the SCell is a self-scheduling cell, both control information and data information are transmitted on the SCell, see figure 1 . If the SCell is configured for cro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04L5/00
CPCH04L5/0053H04L1/003H04L1/0038
Inventor 彭淑燕纪子超
Owner VIVO MOBILE COMM CO LTD