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Method for False Positive Detection in NB-IoT Downlink Control Channel

A narrowband Internet of Things, physical downlink technology, applied in the direction of link quality-based transmission modification, signaling feature, dedicated receiver devices, etc., can solve problems such as increased UE power consumption and reduced throughput

Active Publication Date: 2022-01-25
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method for False Positive Detection in NB-IoT Downlink Control Channel
  • Method for False Positive Detection in NB-IoT Downlink Control Channel
  • Method for False Positive Detection in NB-IoT Downlink Control Channel

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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 of reducing false positive detections in a narrowband Internet of Things (NB‑IoT) downlink control channel, the method comprising the steps of: synchronizing a user equipment (UE) to a network base station (eNB) and The downlink shared channel (NPDSCH) or the narrowband physical uplink shared channel (NPUSCH) exchange data transmissions, while the downlink control information (DCI) related to the downlink or uplink data transmission is signaled by the eNB via the NPDCCH Inform the UE where the effective code rate of the NPDCCH used in receiving the downlink grant is computed to obtain the value CR NPDCCH , calculate the scheduling code rate of NPDSCH or NPUSCH, and get the value CR NPDSCH or CR NPUSCH , calculate the effective code rate CR NPDCCH and scheduling code rate CR NPDSCH or CR NPUSCH The ratio between, get the result x, compare the result x with the predefined upper and lower bounds, if the result x violates the predefined bounds, then discard and not further process the result x as a false positive 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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Patent Type & Authority Patents(China)
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