Unlock instant, AI-driven research and patent intelligence for your innovation.

epdcch search space determination

An enhanced, physical downlink technology, applied in the field of EPDCCH search space determination

Active Publication Date: 2021-01-08
NOKIA TECH OY
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, since some UEs such as MTC UEs deployed in challenging locations (also known as MTC UEs in coverage-enhanced mode) may experience poor channel quality, the eNB may send EPDCCH to these UEs using repeated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • epdcch search space determination
  • epdcch search space determination
  • epdcch search space determination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] The invention will now be discussed with reference to a few example embodiments. It should be understood that these embodiments are discussed only for the purpose of enabling those skilled in the art to better understand and thus realize the present invention, without implying any limitation on the scope of the subject matter.

[0049] The term "base station" (BS) as used herein may refer to a Node B (NodeB or NB), an Evolved NodeB (eNodeB or eNB), a Remote Radio Unit (RRU), a Radio Head (RH), a Remote Radio Head (RRH) , repeaters, low power nodes such as femto, pico, etc.

[0050] The term "user equipment" (UE) as used herein refers to any device capable of communicating with a BS. As examples, a UE may comprise a terminal, a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a mobile station (MS) or an access terminal (AT). Additionally, UEs may include machine type communication enabled MTC UEs such as smart meters. The MTC UE ca...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Embodiments of the invention generally relate to enhanced physical downlink control channel (EPDCCH) search space determination. In one embodiment, the base station can identify the index of the current EPDCCH opportunity period, each EPDCCH opportunity period includes multiple subframes, and the subframes are divided into multiple search units. The distribution of EPDCCH candidates corresponding to at least one EPDCCH aggregation level in the EPDCCH opportunity period may be determined based on the index of the EPDCCH opportunity period and the number of search units in the EPDCCH opportunity period. Then, the base station may select an EPDCCH candidate for transmitting downlink control information (DCI) to the UE from the distribution of EPDCCH candidates.

Description

Background technique [0001] Significant efforts have been made in recent years for the development of the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) in order to achieve improvements in throughput and coverage. In a 3GPP LTE system, some subframes may be allocated for Enhanced Physical Downlink Control Channel (EPDCCH) for transmitting Downlink Control Information (DCI). According to current 3GPP LTE specifications, a DCI (also referred to herein as an EPDCCH message) can be sent by an EPDCCH candidate comprising 1, 2, 4 or 8 Enhanced Control Channel Elements (ECCEs). Transmission of EPDCCH messages has multiple aggregation levels, such as EPDCCH aggregation level 1, 2, 4, or 8, according to the number of ECCEs included in EPDCCH candidates. The EPDCCH search space defines the ECCEs included in a specific EPDCCH candidate for a specific aggregation level. [0002] A mobile station in the system, such as a user equipment (UE), has no a priori knowledge...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04
CPCH04L5/001H04L5/0053H04W16/32H04L5/0098H04L5/0092H04W88/02H04W24/10H04W72/23
Inventor 张元涛姚春海L·林德
Owner NOKIA TECH OY