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Method and device for sending and receiving downlink control information, base station and user equipment

A technology for user equipment and control information, which is applied in the field of communication and can solve problems such as out-of-synchronization, reduced distribution efficiency, and occupation

Pending Publication Date: 2021-07-13
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above PDCCH Order bearer is sent in downlink control information (DCI), but in the related art, this DCI is in 1_0 format (format 1_0), if the base station does not configure the search space type to be formats0-0-And-1 -0 user equipment specific search space (UE Specific Search space), then the base station needs to send the DCI of format 1_0 in the common search space (common search space), which will introduce a large delay, causing the UE to compare Handling the uplink out-of-sync state for a long time
[0003] And if the base station is configured with a user equipment-specific search space whose search space type is formats0-0-And-1-0, since this type of search space needs to occupy the available physical control channel element (control channel element, CCE) resources of the system , resulting in a reduction in the allocation efficiency of the physical downlink control channel (PDCCH)

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  • Method and device for sending and receiving downlink control information, base station and user equipment
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  • Method and device for sending and receiving downlink control information, base station and user equipment

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Embodiment Construction

[0029] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0030] It should be clear that the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0031]Terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0032] In the current 5G NR standard, the PDCCH Ord...

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Abstract

The embodiment of the invention provides a downlink control information sending method and device, a downlink control information receiving method and device, a base station and user equipment. The downlink control information sending method comprises the following steps: when a base station finds that uplink out-of-step occurs in UE in a connected state, determining that a DCI format used by DCI transmission is format1_1, and then sending the DCI by the format1_1 in a user equipment specific search space corresponding to the format1_1, wherein the DCI comprises the PDCCH Order, so the PDCCH Order can be sent on the search space of which the search space type is formats0-1-And-1-1, the time delay of processing the uplink out-of-step state by the UE can be shortened, and the distribution efficiency of the PDCCH is not influenced.

Description

【Technical field】 [0001] The embodiments of the present application relate to the field of communication technologies, and in particular, to a method and device for sending and receiving downlink control information, a base station, and user equipment. 【Background technique】 [0002] In the fifth-generation mobile communication technology (5th-generation, 5G) new radio (new radio, NR) system, when the user equipment (user equipment, UE) is in the connected state, if the base station finds that the UE has lost synchronization in the uplink, the base station will Send physical downlink control channel signaling (physical downlink control channel order, PDCCH Order) to notify UE that uplink out-of-synchronization has occurred. After receiving PDCCH Order, UE needs to send random access channel (random access channel, RACH) to re-complete uplink synchronization process. The above PDCCH Order bearer is sent in downlink control information (DCI), but in the related art, this DCI ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04W56/00H04W74/08
CPCH04L5/0053H04W56/0005H04W74/0833
Inventor 徐勋华
Owner SPREADTRUM COMM (SHANGHAI) CO LTD