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False alarm detection in NB-IOT downlink control channel based on valid and scheduled code rate

A downlink and control channel technology, applied in the field of false alarm detection in the NB-IOT downlink control channel based on effective and scheduling code rate, can solve the problems of increased UE power consumption and reduced throughput

Active Publication Date: 2019-12-24
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in a decrease in throughput and an increase in power consumption of the UE

Method used

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  • False alarm detection in NB-IOT downlink control channel based on valid and scheduled code rate
  • False alarm detection in NB-IOT downlink control channel based on valid and scheduled code rate
  • False alarm detection in NB-IOT downlink control channel based on valid and scheduled code rate

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Embodiment Construction

[0050] Existing channel conditions between a base station (eNB) and a user equipment (UE) determine the code rate required to achieve a particular error rate for transmissions between the UE and eNB. The eNB will adjust the resource allocation and other parameters of the channels NPDCCH, NPDSCH and NPUSCH according to their respective error rate targets in order to balance between the protection level of the transmission and the required radio resources and power consumption. The calculation of effective and scheduled code rates is performed by the UE's modem.

[0051] In one embodiment of the method of the present invention, the effective code rate essentially represents the channel condition between the UE and the base station, and is defined by CR NPDCCH =N I / (R*N) determined, where N I =23 or 24 bits, N is the number of code bits mapped to a single subframe, and R is the number of repetitions of resource mapped subframes. The effective code rate of the NPDCCH channel (...

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Abstract

The present application relates to a method for reducing false alarm detection in an NB-IoT downlink control channel. The objective of the invention is to find a method for enabling UE to carry out reliable false alarm detection on NPDCCH reception. The purpose of the present invention is achieved by a method for reducing false alarm detection in an NB-IoT NPDCCH or an NPUCCH. The method comprisesthe following steps: synchronizing UE to the eNB and exchanging data transmission via a narrowband physical downlink shared channel (NPDSCH or NPUSCH), DCI related to downlink or uplink data transmission being signaled to the UE by an eNB (evolved Node B) through an NPDCCH, wherein the effective code rate of the NPDCCH used in receiving the downlink grant is calculated, obtaining value CRNPDCCH,calculating a scheduling code rate of the NPDSCH or the NPUSCH, obtaining a value CRNPDSCH or a value CRNPUSCH, calculating the ratio between the effective code rate CRNPDCCH and the scheduling code rate CRNPDSCH or CRNPUSCH to obtain a result x, comparing the result x with a predefined upper limit and a predefined lower limit, and if the result x violates the predefined limit, discarding and notfurther processing the result x as false alarm detection.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from EP application EP18189316.5 filed on 16 August 2018, the content of which is incorporated by reference in its entirety. technical field [0003] The present application relates to a method for reducing false positive detections in NB-IoT downlink control channels. Background technique [0004] New markets and technologies are currently being developed for, for example, the Internet-of-things (IoT); new applications for automatic meter reading from outside buildings via cellular networks are emerging. [0005] On the one hand, such applications require increased cellular network coverage. On the other hand, network operators are unwilling to spend too much spectrum as a high-value resource, and device manufacturers want to reduce the cost of such IoT devices that may be mass-produced. [0006] To meet these requirements, the narrowband IoT standard (narrowband IoT, NB-IoT) was dev...

Claims

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Application Information

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IPC IPC(8): H04L1/00
CPCH04L1/0036H04L1/0038H04L1/0023H04L1/0059H04L1/0015H04L1/0067H04L1/0061
Inventor 托马斯·费利斯柴赞·文卡特桑
Owner SHENZHEN GOODIX TECH CO LTD