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Method and device for enhancing downlink control channel

專利號
US11160101B2
公開日期
2021-10-26
申請人
Telefonaktiebolaget LM Ericsson (publ)（SE Stockholm）
發(fā)明人
Qianxi Lu; Jianfeng Wang; Huaisong Zhu; Zhan Zhang
IPC分類
H04W72/12; H04W72/04; H04L5/00
技術(shù)領(lǐng)域
resource,pdcch,subframes,subframe,control,mapping,mapped,device,in,terminal
地域： Stockholm

摘要

Embodiments of the disclosure generally relate to enhancement of downlink control channel. A network device maps control information to a resource region. The control information is associated with data to be transmitted at a first subframe of a first cell. The resource region crosses a plurality of subframes and/or a plurality of cells. Then, the network device transmits the control information on the resource region to a terminal device.

說明書

CROSS REFERENCE TO RELATED APPLICATION(S)

This application is a 35 U.S.C. § 371 National Stage of International Patent Application No. PCT/CN2017/112827, filed Nov. 24, 2017, designating the United States and claiming priority to International Application no. PCT/CN2016/107211, filed on Nov. 25, 2016. The above identified applications are incorporated by reference.

TECHNICAL FIELD

Embodiments of the present disclosure generally relate to the field of communications, and more particularly, to a method and device for enhancing downlink control channel.

BACKGROUND

With the development of communication technologies, multiple types of services or traffic have been proposed, for example, enhanced mobile broadband (eMBB) generally requiring high data rate, massive machine type communication (mMTC) typically requiring long battery lifetime, and ultra-reliable and low latency communication (URLLC). These services require different levels of Quality of Service (QoS), for instance, delay, data rate, packet loss rate, and so on.

Generally, mission critical communication, such as URLLC, requires both low latency and high reliability. Simultaneously achieving such high demands on both reliability and latency may impact many layers and components of both Radio Access Network (RAN) and core network.

權(quán)利要求

1
What is claimed is:1. A method implemented at a network device, comprising:mapping control information to a resource region, the control information being associated with data to be transmitted at a first subframe of a first cell, and the resource region crossing a plurality of cells; andtransmitting the control information on the resource region to a terminal device, whereinmapping control information to a resource region comprises: mapping the control information to one or more control channel elements and mapping the one or more control channel elements to resource elements of subframes of the first cell and a second cell, andmapping the control information to control channel elements comprises:mapping the control information to the control channel elements based on a self-contained encoding scheme, wherein symbols in the mapped control channel element in each subframe may be decoded independently by the terminal device to obtain the control information, ormapping the control information to the control channel elements based on a combined encoding scheme, wherein symbols in the mapped control channel element in all subframes are combined before being decoded to obtain the control information.2. The method of claim 1, further comprising:determining a type of the data to be transmitted; andin response to determining the type belonging to mission critical communication, mapping the control information to the resource region.3. The method of claim 1, further comprising:transmitting, to the terminal device, mapping information about at least one of:subframes to which the control information is mapped,cells to which the control information is mapped,control channel elements or resource elements of subframes to which the control information is mapped,control channel elements or resource elements of cells to which the control information is mapped,an encoding scheme used in the mapping,a numerology of the resource region, anda search space of the resource region.4. A network device, comprising:a processor and a memory, the memory containing program instructions executable by the processor, the processor being configured to cause the network device to perform the method of claim 1.5. A method implemented at a terminal device, comprising:determining a resource region carrying control information, the control information being associated with data transmitted at a first subframe of a first cell, and the resource region crossing a plurality of cells; anddetecting, on the resource region, the control information transmitted from a network device, whereindetecting the control information comprises:decoding the control information based on a self-contained encoding scheme, wherein symbols in the mapped control channel element in each subframe may be decoded independently by the terminal device to obtain the control information, ordecoding the control information based on a combined encoding scheme, wherein symbols in the mapped control channel element in all subframes are combined before being decoded to obtain the control information.6. The method of claim 5, wherein determining a resource region carrying control information comprises:receiving, from the network device, mapping information about at least one of:subframes to which the control information is mapped,cells to which the control information is mapped,control channel elements or resource elements of subframes to which the control information is mapped,control channel elements or resource elements of cells to which the control information is mapped,an encoding scheme used in the mapping,a numerology of the resource region, anda search space of the resource region; anddetermining the resource region based on the mapping information.
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