A method, device and system for configuring a search space

A search space and specific search space technology, applied in the field of search space configuration, can solve problems such as UE cannot send and receive data normally, CSS size is limited, and uplink and downlink ratio information cannot be obtained in time

Active Publication Date: 2019-08-20
HUAWEI TECH CO LTD
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Problems solved by technology

However, the size of the CSS in the existing system is limited. If multiple DCIs need to be carried on the PDCCH in the CSS at the same time, the base station may not be able to find an idle PDCCH from the CSS to carry the uplink and downlink ratio information and send it. The UE cannot obtain the current uplink and downlink configuration information in time, which may cause the UE to fail to send and receive data normally

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Embodiment Construction

[0114] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0115] It should be noted that, in all embodiments of the present invention, the time domain in the communication system is composed of radio frames, and the radio frames use SFN (System Frame Number, system frame number) n f To identify, wherein, the SFN is to cyclically number the radio frames on a periodic basis. For example, if a 10-bit tag SFN is used, then n f The value of is a continuous integer from 0 to 1023, so the wireless frames are numbered from 0 to ...

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Abstract

Embodiments of the present invention provide a method, device, and system for configuring a search space, which relate to the communication field and are used to realize normal transmission of a PDCCH carrying uplink and downlink ratio information, so that user equipment UE can obtain the uplink and downlink configuration ratio of a base station in time information, so as to ensure that the UE can complete data transmission according to the uplink and downlink ratio information, and improve user experience. The method includes; the base station configures a first subframe set, and the subframes in the first subframe set are downlink subframes or special subframes; the base station configures on the subframes in the first subframe set The first common search space CSS: the base station sends a physical layer downlink control channel PDCCH carrying uplink and downlink ratio information to the user equipment UE, wherein the PDCCH is the PDCCH in the first CSS. The present invention is applicable to the scene of transmitting uplink and downlink ratio information.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and system for configuring a search space. Background technique [0002] In the LTE (Long Term Evolution, long-term evolution) system, the base station sends PDCCH (Physical Downlink Control Channel, physical layer downlink control channel) carrying various DCI (Downlink Control Information, uplink and downlink control information) to each UE (User Equipment, user equipment), so that the UE needs to detect the PDCCH, and then acquire various DCIs carried in the PDCCH. Wherein, a PDCCH is formed by aggregating L consecutive CCEs (Control Channel Elements, composed of control channel elements). The search space is a PDCCH set to be detected by the UE, and the search space includes CSS (Common Search Space, common search space) and UESS (UE Specific Search Space, user equipment specific search space). Wherein, the CSS is a search space that multiple UEs in the ce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04
CPCH04W72/23H04L5/0053H04W48/12H04J11/0086H04L5/005
Inventor 马莎李超君
Owner HUAWEI TECH CO LTD
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