Content for TR 22.837 Word version: 19.4.0

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3.1 Terms 3.2 Symbols 3.3 Abbreviations
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0 Introduction p. 9

Wireless sensing technologies aim at acquiring information about a remote object or environment and its characteristics without physically contacting it. The perception data of the object and its surrounding can be utilized for analysis, so that meaningful information about the object or environment and its characteristics can be obtained.

1 Scope p. 10

The present document describes use cases and potential requirements for enhancement of the 5G system to provide sensing services addressing different target verticals/applications, e.g. autonomous/assisted driving, V2X, UAVs, 3D map reconstruction, smart city, smart home, factories, healthcare, maritime sector.

Use cases focus on NR-based sensing, while some use cases might make use of information already available in EPC and E-UTRA (e.g. cell/UE measurements, location updates). This study will not lead to impacts on EPC and E-UTRA. Some use cases could also include non-3GPP type sensors (e.g. Radar, camera).

The aspects addressed in the present document include collecting and reporting of sensing information, sensing related KPIs. Security, privacy, regulation and charging are additional topics of concern.

2 References p. 10

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.

References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.

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[28]

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[29]

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[30]

https://mentor.ieee.org/802.11/dcn/20/11-20-1712-02-00bf-wifi-sensing-use-cases.xlsx.

[31]

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[34]

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[42]

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3 Definitions of terms, symbols and abbreviations p. 13

3.1 Terms p. 13

For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.

3GPP sensing data:

data derived from 3GPP radio signals impacted (e.g. reflected, refracted, diffracted) by an object or environment of interest for sensing purposes, and optionally processed within the 5G system.

5G Wireless sensing:

5GS feature providing capabilities to get information about characteristics of the environment and/or objects within the environment (e.g. shape, size, orientation, speed, location, distances or relative motion between objects, etc) using NR RF signals and, in some cases, previously defined information available in EPC and/or E-UTRA.

Human motion rate accuracy:

describes the closeness of the measured value of the human body movement frequency caused by part(s) (e.g. chest) of the target object (i.e. human body) to the true value of the human body movement frequency.

non-3GPP sensing data:

data provided by non-3GPP sensors (e.g. video, LiDAR, sonar) about an object or environment of interest for sensing purposes.

Sensing assistance information:

information that is provided to 5G system and can be used to derive sensing result. This information does not contain 3GPP sensing data.

Sensing contextual information:

information that is exposed with the sensing results by 5G system to a trusted third party which provides context to the conditions under which the sensing results were derived. This information does not contain 3GPP sensing data.

Sensing group:

a set of sensing transmitters and sensing receivers whose location is known and whose sensing data can be collected synchronously.

Sensing measurement process:

process of collecting sensing data.

Sensing receiver:

a sensing receiver is an entity that receives the sensing signal which the sensing service will use in its operation. A sensing receiver is an NR RAN node or a UE. A Sensing receiver can be located in the same or different entity as the Sensing transmitter.

Sensing result:

processed 3GPP sensing data requested by a service consumer.

Sensing signals:

Transmissions on the 3GPP radio interface that can be used for sensing purposes.

Sensing transmitter:

a sensing transmitter is the entity that sends out the sensing signal which the sensing service will use in its operation. A Sensing transmitter is an NR RAN node or a UE. A Sensing transmitter can be located in the same or different entity as the Sensing receiver.

Target sensing service area:

a cartesian location area that needs to be sensed by deriving characteristics of the environment and/or objects within the environment with certain sensing service quality from the impacted (e.g. reflected, refracted, diffracted) wireless signals. This includes both indoor and outdoor environments.

Moving target sensing service area:

the case where a target sensing service area is moving according to the mobility of a target from sensing transmitter's perspective.

Transparent sensing:

sensing measurements are communicated such that they can be discerned and interpreted by the 5G system, e.g. the data is communicated using a standard protocol to an interface defined by the 5G system.

The following KPIs apply to the definition of the use cases on sensing quantitative requirements:

Accuracy of positioning estimate: describes the closeness of the measured sensing result (i.e. position) of the target object to its true position value. It can be further derived into a horizontal sensing accuracy - referring to the sensing result error in a 2D reference or horizontal plane, and into a vertical sensing accuracy - referring to the sensing result error on the vertical axis or altitude.
Accuracy of velocity estimate: describes the closeness of the measured sensing result (i.e. velocity) of the target object's velocity to its true velocity.
Confidence level: describes the percentage of all the possible measured sensing results that can be expected to include the true sensing result considering the accuracy.
Sensing Resolution: describes the minimum difference in the measured magnitude of target objects (e.g. range, velocity) to be allowed to detect objects in different magnitude.
Missed detection probability is the conditional probability of not detecting the presence of target object/environment when the target object/environment is present. This probability is denoted by the ratio of the number of events falsely identified as negative, over the total number of events with a positive state. It applies only to binary sensing results.

NOTE 4:
An event with a positive state refers to the presence of the characteristics of a target object or environment, including the event falsely identified as being negative and truly identified as being positive
False alarm probability is the conditional probability of falsely detecting the the presence of target object/environment when the target object/environment is not present. This probability is denoted by the ratio of the number of events falsely identified as being positive, over the total number of events with a negative state. It applies only to binary sensing results.

NOTE 5:
An event with a negative state refers to the non-presence of the characteristics of a target object or environment, including the event falsely identified as being positive and truly identified as being negative
Max sensing service latency: time elapsed between the event triggering the determination of the sensing result and the availability of the sensing result at the sensing system interface.
Refreshing rate: rate at which the sensing result is generated by the sensing system. It is the inverse of the time elapsed between two successive sensing results.

3.2 Symbols p. 14

For the purposes of the present document, the following symbols apply:

3.3 Abbreviations p. 14

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.