Information technology — Internet of media things — Part 2: Discovery and communication API

This document specifies the abstract class of a media thing (MThing), which is a basic component to construct the Internet of media things. The MThing class contains the basic APIs to: — discover other MThing(s) in the network; — connect/disconnect MThing(s); — support transactions (e.g. payments) using media tokens between MThings.

Technologies de l'information — Internet des objets media — Partie 2: API pour la découverte et la communication

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Publication Date
29-Mar-2022
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5060 - Close of voting Proof returned by Secretariat
Completion Date
12-Jan-2022
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INTERNATIONAL ISO/IEC
STANDARD 23093-2
Second edition
2022-03
Information technology — Internet of
media things —
Part 2:
Discovery and communication API
Technologies de l'information — Internet des objets media —
Partie 2: API pour la découverte et la communication
Reference number
ISO/IEC 23093-2:2022(E)
© ISO/IEC 2022
---------------------- Page: 1 ----------------------
ISO/IEC 23093-2:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on

the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below

or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/IEC 23093-2:2022(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction .................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................................................................... 1

4 APIs ..................................................................................................................................................................................................................................... 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 Abstract Class of MThing .............................................................................................................................................................. 7

4.2.1 General ........................................................................................................................................................................................ 7

4.3 Return type class............................................................................................................................................................................... 10

4.3.1 MThingInfoType ............................................................................................................................................................... 10

4.3.2 MPEG21TerminalCapabilityType ......................................................................................................................12

iii
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 3 ----------------------
ISO/IEC 23093-2:2022(E)
Foreword

ISO (the International Organization for Standardization) and IEC (the International Electrotechnical

Commission) form the specialized system for worldwide standardization. National bodies that are

members of ISO or IEC participate in the development of International Standards through technical

committees established by the respective organization to deal with particular fields of technical

activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international

organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the

work.

The procedures used to develop this document and those intended for its further maintenance

are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria

needed for the different types of document should be noted. This document was drafted in

accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives or

www.iec.ch/members_experts/refdocs).

Attention is drawn to the possibility that some of the elements of this document may be the subject

of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent

rights. Details of any patent rights identified during the development of the document will be in the

Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) or the IEC

list of patent declarations received (see patents.iec.ch).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to

the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see

www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding-standards.

This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,

Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.

This second edition cancels and replaces the first edition (ISO/IEC 23093-2:2019), which has been

technically revised.
The main changes are as follows:
— modification of the introduction;
— addition of new APIs for discovery and communication;
— addition of a transaction model using state channels.

A list of all parts in the ISO/IEC 23093 series can be found on the ISO and IEC websites.

Any feedback or questions on this document should be directed to the user’s national standards

body. A complete listing of these bodies can be found at www.iso.org/members.html and

www.iec.ch/national-committees.
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/IEC 23093-2:2022(E)
Introduction

The ISO/IEC 23093 series provides an architecture and specifies APIs and compressed representation

of data flowing between media things.

The APIs for the media things facilitate discovering other media things in the network, connecting and

efficiently exchanging data between media things. The APIs also support transaction tokens to access

valuable functionalities, resources, and data from media things.

Media things related information consists of characteristics and discovery data, setup information from

a system designer, raw and processed sensed data, and actuation information. The ISO/IEC 23093 series

specifies input and output data formats for media sensors, media actuators, media storages, media

analysers, etc. Media analysers can process sensed data from media sensors to produce analysed data,

and the media analysers can be cascaded in order to extract semantic information.

This document contains the APIs to discover media things in the network and communication between

media things and the APIs to facilitate transactions between media things.

The International Organization for Standardization (ISO) and International Electrotechnical

Commission (IEC) draw attention to the fact that it is claimed that compliance with this document may

involve the use of a patent.

ISO and IEC take no position concerning the evidence, validity and scope of this patent right.

The holder of this patent right has assured ISO and IEC that they are willing to negotiate licences under

reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this

respect, the statement of the holder of this patent right is registered with ISO and IEC. Information may

be obtained from the patent database available at www.iso.org/patents.

Attention is drawn to the possibility that some of the elements of this document may be the subject

of patent rights other than those in the patent database. ISO and IEC shall not be held responsible for

identifying any or all such patent rights.
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO/IEC 23093-2:2022(E)
Information technology — Internet of media things —
Part 2:
Discovery and communication API
1 Scope

This document specifies the abstract class of a media thing (MThing), which is a basic component to

construct the Internet of media things. The MThing class contains the basic APIs to:

— discover other MThing(s) in the network;
— connect/disconnect MThing(s);
— support transactions (e.g. payments) using media tokens between MThings.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO/IEC 23093-1, Information technology — Internet of media things — Part 1: Architecture

ISO/IEC 23093-3:2019, Information technology — Internet of media things — Part 3: Media data formats

and API

ISO/IEC 21000-7:2007, Information technology — Multimedia framework (MPEG-21) — Part 7: Digital

Item Adaptation
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO/IEC 23093-1 apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 APIs
4.1 General

This clause specifies APIs to discover MThings, and connect/disconnect communication between

MThings. Besides, APIs and return class types are specified to provide MThing information and

hardware descriptions.

An MThing can be discovered by its capabilities or supported media token types. The discovered

MThing(s) can then relay its (their) information to the requester (i.e. another MThing).

Figure 1 shows the process to discover MThings in the network by a required capability. Each MThing,

which supports the required capability, can send back its information. In the figure, an MThing

© ISO/IEC 2022 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/IEC 23093-2:2022(E)

broadcasts a message using discoverMThingByCapability()to look for MSensors capable of capturing

audio (Figure 1, item 1). Each MSensor (e.g. MMicrophone1, MMicrophone2, MCamera1) sends back

its information using sendBackMThingInfo(), which returns the data format MThingInfo specified in

ISO/IEC 23093-3 (Figure 1, item 2).

Figure 2 shows the process of connecting MThings with a capability. First, an MThing (i.e. ReqMThing)

can ask the availability of the specific capability (e.g. SENSOR_CAPTURE_AUDIO) with the function

isCapabilityAvailable() to another MThing (Figure 2, item 1). If the capability “SENSOR_CAPTURE_

AUDIO” is currently unavailable, the MThing (i.e. MMicrophone1) notifies “unavailable” (Figure 2,

item 2). Then, the ReqMThing can ask the availability of the specific capability again to other MThings

(Figure 2, item 3) with the binary representation of “MSensor” and “SENSOR_CAPTURE_AUDIO”.

Because the MCamera1 notifies the ReqMThing that its “SENSOR_CAPTURE_AUDIO” capability

is available (Figure 2, item 4), the ReqMThing can connect to the camera and reserve its “SENSOR_

CAPTURE_AUDIO” capability (Figure 2, item 5). As long as the capability “SENSOR_CAPTURE_AUDIO”

of the MCamera1 is used by the ReqMThing, other MThings cannot access the corresponding capability.

Figure 1 — Discovering MThings by capability
Figure 2 — Connecting MThings based on a capability
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 7 ----------------------
ISO/IEC 23093-2:2022(E)

Figure 3 shows the process of disconnecting (i.e. releasing capabilities of) an MThing. The ReqMThing

can release either all of its reserved capabilities of the MCamera (Figure 3, items 1 and 2) or a designated

capability (e.g. SENSOR_CAPTURE_AUDIO) (Figure 3, items 3 and 4) using disconnectMThing().

Figure 3 — Disconnecting an MThing

Figure 4 shows the process where an MThing alerts other MThings that all or some of its capabilities

will be unavailable. The MCamera can warn the MThing_01 that either all of the capabilities reserved

by MThing_01 are unavailable (Figure 4, items 1 and 2) or a designated capability (e.g.

SENSOR_CAPTURE_AUDIO) is no longer available to MThing_01 (Figure 4, items 3 and 4) using

alertDisconnection().
Figure 4 — Alerting disconnection to an MThing
© ISO/IEC 2022 – All rights reserved
---------------------- Page: 8 ----------------------
ISO/IEC 23093-2:2022(E)
Figure 5 — Transaction process between a user and an MThing

Figure 5 shows a sequence diagram of a transaction process between a user and an MThing. Suppose

that a user wants to watch a video captured from a nearby camera (i.e. MCamera). The user asks a

cost per minute to watch a video taken by the MCamera using getVideoURL_CostPerMinute(). Using

the user interface of Apps, DApps, or Web (Figure 5, item 1), the user can send desired media token

defined by tokenType (e.g. cryptocurrency or legal tender) and tokenName (e.g. Bitcoin or US dollar).

The MCamera returns the cost per minute to let the user use the getVideoURL() function (Figure 5,

item 2). If the user wants to watch the video with the responded price, they ask for a wallet address

(Figure 5, item 3) of the desired MToken. Again, the MCamera responds with the proper wallet address

(Figure 5, item 4). The user sends some MTokens to the wallet address through a payment system

like a blockchain or a banking system (Figure 5, item 5) which returns a transaction ID (Figure 5,

item 6). With this transaction ID (i.e. tid), the user can confirm (Figure 5, item 8) whether the token

transaction was completed to the designated wallet address or not (Figure 5, item 7) using checkTransa

ctionCompletion(tid). Once the transaction is confirmed, the user can ask for the video stream service

to the MCamera using getVideoURL(tid) (Figure 5, item 9). The MCamera checks for the completion

of the token transaction using checkTransactionCompletion(tid) (Figure 5, item 10) and the amount

of MTokens received (Figure 5, item 11). The MCamera returns a video URL and streams the video

as much as the user paid (Figure 5, item 12). The details of APIs, getVideoURL_CostPerMinute() and

getVideoURL() are given in ISO/IEC 23093-3.

Figure 6 shows a sequence diagram of a transaction process between MThings. Suppose that a camera

(i.e. MCamera) wants to stream a captured video to a nearby display (i.e. MDisplay) and play it. The

MCamera asks a cost per minute to play a video on the MDisplay using setVideoURL_CostPerMinute()

(Figure 6, item 1) with desired media token defined by tokenType (e.g. cryptocurrency or legal tender) and

tokenName (e.g. Bitcoin or US dollar). The MDisplay returns the cost per minute to use the setVideoURL()

function (Figure 6, item 2). If the MCamera wants to play the video with the responded price, it asks for a

wallet address (Figure 6, item 3) of the desired MToken. Again, the MDisplay responses with the proper

wallet address (Figure 6, item 4). The MCamera sends some MTokens to the wallet address through a

payment system like a blockchain or a banking system (Figure 6, item 5) which returns a transaction

ID (Figure 6, item 6). With this transaction ID (i.e. tid), th
...

FINAL
INTERNATIONAL ISO/IEC
DRAFT
STANDARD FDIS
23093-2
ISO/IEC JTC 1/SC 29
Information technology — Internet of
Secretariat: JISC
media things —
Voting begins on:
2021-11-16
Part 2:
Voting terminates on:
Discovery and communication API
2022-01-11
Technologies de l'information — Internet des objets media —
Partie 2: API pour la découverte et la communication
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/IEC FDIS 23093-2:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO/IEC 2021
---------------------- Page: 1 ----------------------
ISO/IEC FDIS 23093-2:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on

the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below

or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO/IEC 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/IEC FDIS 23093-2:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction .................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................................................................... 1

4 APIs ..................................................................................................................................................................................................................................... 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 Abstract Class of MThing .............................................................................................................................................................. 7

4.2.1 General ........................................................................................................................................................................................ 7

4.3 Return type class............................................................................................................................................................................... 10

4.3.1 MThingInfoType ............................................................................................................................................................... 10

4.3.2 MPEG21TerminalCapabilityType ......................................................................................................................12

iii
© ISO/IEC 2021 – All rights reserved
---------------------- Page: 3 ----------------------
ISO/IEC FDIS 23093-2:2021(E)
Foreword

ISO (the International Organization for Standardization) and IEC (the International Electrotechnical

Commission) form the specialized system for worldwide standardization. National bodies that are

members of ISO or IEC participate in the development of International Standards through technical

committees established by the respective organization to deal with particular fields of technical

activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international

organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the

work.

The procedures used to develop this document and those intended for its further maintenance

are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria

needed for the different types of document should be noted. This document was drafted in

accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives or

www.iec.ch/members_experts/refdocs).

Attention is drawn to the possibility that some of the elements of this document may be the subject

of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent

rights. Details of any patent rights identified during the development of the document will be in the

Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) or the IEC

list of patent declarations received (see patents.iec.ch).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to

the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see

www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding-standards.

This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,

Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.

This second edition cancels and replaces the first edition (ISO/IEC 23093-2:2019), which has been

technically revised.
The main changes are as follows:
— modification of the introduction;
— addition of new APIs for discovery and communication;
— addition of a transaction model using state channels.

A list of all parts in the ISO/IEC 23093 series can be found on the ISO and IEC websites.

Any feedback or questions on this document should be directed to the user’s national standards

body. A complete listing of these bodies can be found at www.iso.org/members.html and

www.iec.ch/national-committees.
© ISO/IEC 2021 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/IEC FDIS 23093-2:2021(E)
Introduction

The ISO/IEC 23093 series provides an architecture and specifies APIs and compressed representation

of data flowing between media things.

The APIs for the media things facilitate discovering other media things in the network, connecting and

efficiently exchanging data between media things. The APIs also support transaction tokens to access

valuable functionalities, resources, and data from media things.

Media things related information consists of characteristics and discovery data, setup information from

a system designer, raw and processed sensed data, and actuation information. The ISO/IEC 23093 series

specifies input and output data formats for media sensors, media actuators, media storages, media

analysers, etc. Media analysers can process sensed data from media sensors to produce analysed data,

and the media analysers can be cascaded in order to extract semantic information.

This document contains the APIs to discover media things in the network and communication between

media things and the APIs to facilitate transactions between media things.

The International Organization for Standardization (ISO) and International Electrotechnical

Commission (IEC) draw attention to the fact that it is claimed that compliance with this document may

involve the use of patents.

ISO and IEC take no position concerning the evidence, validity and scope of these patent rights.

The holders of these patent rights have assured ISO and IEC that they are willing to negotiate licences

under reasonable and non-discriminatory terms and conditions with applicants throughout the world.

In this respect, the statements of the holders of these patent rights are registered with ISO and IEC.

Information may be obtained from the patent database available at www.iso.org/patents.

Attention is drawn to the possibility that some of the elements of this document may be the subject

of patent rights other than those in the patent database. ISO and IEC shall not be held responsible for

identifying any or all such patent rights.
© ISO/IEC 2021 – All rights reserved
---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/IEC FDIS 23093-2:2021(E)
Information technology — Internet of media things —
Part 2:
Discovery and communication API
1 Scope

This document specifies the abstract class of a media thing (MThing), which is a basic component to

construct the Internet of media things. The MThing class contains the basic APIs to:

— discover other MThing(s) in the network;
— connect/disconnect MThing(s);
— support transactions (e.g. payments) using media tokens between MThings.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO/IEC 23093-1, Information technology — Internet of media things — Part 1: Architecture

ISO/IEC 23093-3:2019, Information technology — Internet of media things — Part 3: Media data formats

and API

ISO/IEC 21000-7:2007, Information technology — Multimedia framework (MPEG-21) — Part 7: Digital

Item Adaptation
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO/IEC 23093-1 apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 APIs
4.1 General

This clause specifies APIs to discover MThings, and connect/disconnect communication between

MThings. Besides, APIs and return class types are specified to provide MThing information and

hardware descriptions.

An MThing can be discovered by its capabilities or supported media token types. The discovered

MThing(s) can then relay its (their) information to the requester (i.e. another MThing).

Figure 1 shows the process to discover MThings in the network by a required capability. Each MThing,

which supports the required capability, can send back its information. In the figure, an MThing

© ISO/IEC 2021 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/IEC FDIS 23093-2:2021(E)

broadcasts a message using discoverMThingByCapability()to look for MSensors capable of capturing

audio (Figure 1, item 1). Each MSensor (e.g. MMicrophone1, MMicrophone2, MCamera1) sends back

its information using sendBackMThingInfo(), which returns the data format MThingInfo specified in

ISO/IEC 23093-3 (Figure 1, item 2).

Figure 2 shows the process of connecting MThings with a capability. First, an MThing (i.e. ReqMThing)

can ask the availability of the specific capability (e.g. SENSOR_CAPTURE_AUDIO) with the function

isCapabilityAvailable() to another MThing (Figure 2, item 1). If the capability “SENSOR_CAPTURE_

AUDIO” is currently unavailable, the MThing (i.e. MMicrophone1) notifies “unavailable” (Figure 2,

item 2). Then, the ReqMThing can ask the availability of the specific capability again to other MThings

(Figure 2, item 3) with the binary representation of “MSensor” and “SENSOR_CAPTURE_AUDIO”.

Because the MCamera1 notifies the ReqMThing that its “SENSOR_CAPTURE_AUDIO” capability

is available (Figure 2, item 4), the ReqMThing can connect to the camera and reserve its “SENSOR_

CAPTURE_AUDIO” capability (Figure 2, item 5). As long as the capability “SENSOR_CAPTURE_AUDIO”

of the MCamera1 is used by the ReqMThing, other MThings cannot access the corresponding capability.

Figure 1 — Discovering MThings by capability
Figure 2 — Connecting MThings based on a capability
© ISO/IEC 2021 – All rights reserved
---------------------- Page: 7 ----------------------
ISO/IEC FDIS 23093-2:2021(E)

Figure 3 shows the process of disconnecting (i.e. releasing capabilities of) an MThing. The ReqMThing

can release either all of its reserved capabilities of the MCamera (Figure 3, items 1 and 2) or a designated

capability (e.g. SENSOR_CAPTURE_AUDIO) (Figure 3, items 3 and 4) using disconnectMThing().

Figure 3 — Disconnecting an MThing

Figure 4 shows the process where an MThing alerts other MThings that all or some of its capabilities

will be unavailable. The MCamera can warn the MThing_01 that either all of the capabilities reserved

by MThing_01 are unavailable (Figure 4, items 1 and 2) or a designated capability (e.g.

SENSOR_CAPTURE_AUDIO) is no longer available to MThing_01 (Figure 4, items 3 and 4) using

alertDisconnection().
Figure 4 — Alerting disconnection to an MThing
© ISO/IEC 2021 – All rights reserved
---------------------- Page: 8 ----------------------
ISO/IEC FDIS 23093-2:2021(E)
Figure 5 — Transaction process between a user and an MThing

Figure 5 shows a sequence diagram of a transaction process between a user and an MThing. Suppose

that a user wants to watch a video captured from a nearby camera (i.e. MCamera). The user asks a

cost per minute to watch a video taken by the MCamera using getVideoURL_CostPerMinute(). Using

the user interface of Apps, DApps, or Web (Figure 5, item 1), the user can send desired media token

defined by tokenType (e.g. cryptocurrency or legal tender) and tokenName (e.g. Bitcoin or US dollar).

The MCamera returns the cost per minute to let the user use the getVideoURL() function (Figure 5,

item 2). If the user wants to watch the video with the responded price, they ask for a wallet address

(Figure 5, item 3) of the desired MToken. Again, the MCamera responds with the proper wallet address

(Figure 5, item 4). The user sends some MTokens to the wallet address through a payment system

like a blockchain or a banking system (Figure 5, item 5) which returns a transaction ID (Figure 5,

item 6). With this transaction ID (i.e. tid), the user can confirm (Figure 5, item 8) whether the token

transaction was completed to the designated wallet address or not (Figure 5, item 7) using checkTransa

ctionCompletion(tid). Once the transaction is confirmed, the user can ask for the video stream service

to the MCamera using getVideoURL(tid) (Figure 5, item 9). The MCamera checks for the completion

of the token transaction using checkTransactionCompletion(tid) (Figure 5, item 10) and the amount

of MTokens received (Figure 5, item 11). The MCamera returns a video URL and streams the video

as much as the user paid (Figure 5, item 12). The details of APIs, getVideoURL_CostPerMinute() and

getVideoURL() are given in ISO/IEC 23093-3.

Figure 6 shows a sequence diagram of a transaction process between MThings. Suppose that a camera

(i.e. MCamera) wants to stream a captured video to a nearby display (i.e. MDisplay) and play it. The

MCamera asks a cost per minute to play a video on the MDisplay using setVideoURL_CostPerMinute()

(Figure 6, item 1) with desired media token defined by tokenType (e.g. cryptocurrency or legal tender) and

tokenName (e.g. Bitcoin or US dollar). The MDisplay returns the cost per minute to use the setVideoURL()

function (Figure 6, item 2). If the MCamera wants to play the video with the responded price, it asks for a

wallet address (Figure 6, item 3) of the desired MToken. Again, the MD
...

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