scope:

This part of ISO 15638 addresses the provision of tyre pressure monitoring and specifies the form and content of the transmission of such data required to support such systems, and access methods to that data.

The scope of this part of ISO 15638 is to provide specifications for common communications and data exchange aspects of the application service "tyre pressure monitoring" (TPM) that a jurisdiction regulator, or operator, may elect to require or support as an option, including:

a) High level definition of the service that a service provider has to provide, (The service definition describes common service elements; but does not define the detail of how such an application service is instantiated, nor the acceptable value ranges of the data concepts defined)

b) Means to realise the service

c) Application data naming, content and quality that an IVS has to deliver, including a number of TPM profiles or data (noting that requirements and constraints of what can/cannot be transmitted over the air may vary between jurisdictions)

d) Support for a number of defined communication profiles to enable remote inspection.

The present version of this International Standard provides specifications for the following application profiles:

Application Profile A1 : The cyclical initiation of TPM message by on-board equipment (TPM-C)

Application Profile A2 : The exceptional initiation of TPM message by on-board equipment (TPM-E)

Application Profile A3: The provision of TPM data as the result of an offboard request (TPM-R)

Application Profile A4: The provision of TPM data as the result of an offboard reading of tyre pressures of vehicles which may be unequipped (TPM-O)

The present version of this International Standard provides specifications for the following communication profiles:

Communication Profile C1: Remote inspection addressed via an ITS-station instigating a download of data to an application service provider via a wireless communications interface (as defined in ISO 15638-2).

Communication Profile C2: Remote inspection addressed via a packet switched cellular network (3G LTE, 4G LTE, 5G SRE) instigating a download of data to an application service provider via a wireless communications interface.

Communication Profile C3: Roadside inspection using an (EN, ARIB, TTAK compliant) short range wireless communication interrogator to an application service provider via a wireless communications interface (as defined in ISO 15638-2).

Profile C3a: via a hand aimed or temporary roadside mounted and aimed interrogator

Profile C3b: via a vehicle mounted and directed interrogator

Profile C3cc: via a permanent or semi-permanent roadside or overhead gantry

Communication Profile C4: Roadside inspection using an (EN, ARIB, TTAK compliant) short range wireless communication interrogator instigating a physical roadside inspection (master-:-slave)

Profile C3a: via a hand aimed or temporary roadside mounted and aimed interrogator

Profile C3b: via a vehicle mounted and directed interrogator

Profile C3cc: via a permanent or semi-permanent roadside or overhead gantry

Communication Profile C5: Roadside inspection using in-road equipment

Subsequent versions of this International Standard may support additional communication profiles.

Systems claiming compliance with this part of ISO 15638 (ISO 15638-23) may support one or multiple application profiles but shall clearly declare which application profiles of this International Standard that they support.(A1 (TPM-C), A2(TPM- E, A3(TPM-R), A4(TPM-O)

Systems claiming compliance with this part of ISO 15638 (ISO 15638-23) may support one or multiple communication profiles but shall clearly declare which communication profiles of this International Standard that they support. (C1, C2, C3 a-c).

NOTE 1 Jurisdictions requiring and regulating the use of remotely monitored TPM systems are recommended to specifically regulate to determine which communications profiles are required to be supported, and may also wish to regulate regarding which application profiles are required to be supported. It is further recommended (but not required) that jurisdictions whose regulations require support of communications Profile C3 for regulatory enforcement purposes also at least encourage the ability to technically support Profile C1 in addit1ion (for later potential migration purposes).

NOTE 2 The definition of what comprises a 'regulated' service is regarded as an issue for National decision, and may vary from jurisdiction _to jurisdiction. This document does not impose any requirements on nations in respect of which services for regulated vehicles jurisdictions will require, or support as an option, but provides standardised sets of requirements descriptions for identified services to enable consistent and cost efficient implementations where instantiated.

NOTE 3 ISO 15638 has been developed for use in the context of regulated commercial freight vehicles (hereinafter referred to as 'regulated vehicles') There is nothing however to prevent a jurisdiction extending or adapting the scope to include other types of regulated vehicles, as it deems appropriate.