Specification of Communication, AUTOSAR 15, R23-11, CP 

AUTOSARが2023年版、R23-11を公開しました。
https://www.autosar.org/fileadmin/standards/R22-11/CP/AUTOSAR_SWS_COM.pdf

R22-11
https://www.autosar.org/fileadmin/standards/R22-11/CP/AUTOSAR_SWS_COM.pdf

R21-11
https://www.autosar.org/fileadmin/standards/R21-11/CP/AUTOSAR_SWS_COM.pdf

R20-11
https://www.autosar.org/fileadmin/standards/R20-11/CP/AUTOSAR_SWS_COM.pdf

R19-11
https://www.autosar.org/fileadmin/standards/R19-11/CP/AUTOSAR_SWS_COM.pdf

文書は検索してダウンロードできます。
https://www.autosar.org/



<この項は書きかけです。順次追記します。>
This article is not completed. I will add some words in order.

# Release Overviews
AUTOSARには現在3つの分類があります。Foundation, CAN OSEK/VDXのClassic Platform, Ethernet/TCP/IP POSIXのAdaptive Platform.

Foundation Release Overview, AUTOSAR 781, R23-11, FO
https://qiita.com/kaizen_nagoya/items/f249bdb8c313d8bff883

Classic Platform Release Overview, AUTOSAR No.0 ,R23-11, CP
https://qiita.com/kaizen_nagoya/items/9d22c8722cbc0f42b137

Adaptive Platform Release Overview, AUTOSAR 782, R23-11, AP
https://qiita.com/kaizen_nagoya/items/13a104606a34fe24fcf7

# Qiita 記事一覧
Autosar Foundation R23-11 一覧
https://qiita.com/kaizen_nagoya/items/c30674cb2dac2fcbbd04

AUTOSAR Adaptive Platform R23-11一覧
https://qiita.com/kaizen_nagoya/items/1dece8799a730367b0dc

Autosar Classic Platform R23-11 一覧
https://qiita.com/kaizen_nagoya/items/f770f6c2906e1dcbf180


# 文書変更(Document Change) 
>• Removed obsolete elements
• Minor corrections / clarifications / editorial changes
# 用語(terms)

|term|Description|
|:--|:--|
|AUTOSAR COM |The AUTOSAR COM module is derived from [17]. For details, see Chapter 7.2.1.
|DM |Deadline Monitoring, for details see Chapter 7.3.6
|I-PDU |Interaction Layer Protocol Data Unit. An I-PDU carries signals. It is defined in [17].
|L-PDU |Data Link Layer Protocol Data Unit. In AUTOSAR, the Data Link Layer is equivalent to the Communication Hardware Abstraction and Microcontroller Abstraction Layer.
|MDT |A detailed description of the Minimum Delay Timer (MDT) can be found in [17]. See also Chapter 7.3.5.5.
|PDU Router |The PDU Router is a module transferring I-PDUs from one module to another module. The PDU Router can be utilized for gateway operations and for internal routing purposes.
|SDU |Service Data Unit For a description see [1] Chapter 4.
|TM |Transmission Mode
|TMC |Transmission Mode Condition, see Chapter 7.3.3.2
|TMS |Transmission Mode Selector, see Chapter 7.3.3.2
|Confirmation| With a Confirmation, the PDU Router reports that a request by the AUTOSAR COM module has been completed successfully. It is a reaction to a request of COM. E.g. when a PDU has been successfully transmitted.
|Data Invalid Value| Value sent by the AUTOSAR COM module to indicate that the sender side AUTOSAR Software Component is not able to provide a valid value.
|Dynamic Length Signal|A dynamic length signal is a signal which length can vary at run-time.
|Dynamic Length I-PDU|A dynamic length I-PDU is an I-PDU containing a dynamic length signal. It length varies depending on the length of the included dynamic length signal.
|Group signal |A group signal is a signal that is contained in a signal group.
|Indication| An Indication is asynchronous information from PDU Router to COM, e.g. to acknowledge that something has been received.
|Init Value| I-PDUs and signals are set to the Init Value by the AUTOSAR COM module after start-up. This value is used until it is overwritten.
|I-PDU group |An I-PDU Group is an arbitrary collection of I-PDUs of the same direction (i.e. send or receive) in the COM module.
|Inter-ECU – communication|Communication between two or more ECUs for example via a CAN network Intra-ECU – communication|Communication between Software components that reside on the same ECU
|Large Signal| A large signal is a signal that is too large to fit into a single L-PDU of the underlying communication protocol.
|Large I-PDU| Large I-PDUs are I-Signal-I-PDUs which do not fit into a single L-PDU of the underlying communication protocol. Large I-PDUs will be handled like other  I-PDUs by COM, but are transmitted/received via the TP API. Please note that large I-PDUs can also be handled in a more efficient way by LargeDataCOM if they contain just one signal, or if the signals can be (de- )serialized by the RTE. But if the signals have to be treated separately or have to be routed, the large I-PDUs have to be handled by COM.
|Message |[17] uses always the synonym message. In AUTOSAR, message is replaced by signal but with the same meaning.
|Metadata |For some I-PDUs, e.g. J1939 I-PDUs, the payload is extended with additional metadata containing for example the CAN-ID. Notification Information by the AUTOSAR COM module to its users (e.g. RTE, SwCluC), e.g. when new data is available, an error occurred.
|Signal| A signal in the AUTOSAR COM module’s context is equal to a message in [17]; see also [7].
|Signal group |In AUTOSAR, so called complex data types are used. Inside a complex data type, there are one or more data elements (primitive data types), like in a C struct. The data consistency of such complex data types must be ensured. The user (e.g. RTE or SwCluC) decomposes the complex data type in single signals and sends them to the AUTOSAR COM module. As these signals altogether need to be treated consistently, they are called signal group. See also [7].
|Update-bit |A mechanism supported by the AUTOSAR COM module with that the receiver of a signal/ signal group could identify whether the sender has updated the data in this signal/ signal group before sending. See Chapter 7.9.

# References

Glossaryも掲載しましょう。
https://www.autosar.org/fileadmin/standards/R23-11/FO/AUTOSAR_FO_TR_Glossary.pdf

[1] AUTOSAR Layered Architecture AUTOSAR_EXP_LayeredSoftwareArchitecture.pdf
[2] Specification of Communication Stack Types AUTOSAR_SWS_CommunicationStackTypes.pdf
[3] General Requirements on Basic Software Modules AUTOSAR_SRS_BSWGeneral.pdf
[4] Basic Software UML Model AUTOSAR_MOD_BSWUMLModel.eap
[5] Specification of Standard Types AUTOSAR_SWS_StandardTypes.pdf
[6] Specification of the Virtual Functional Bus AUTOSAR_EXP_VFB.pdf
[7] Requirements on Communication AUTOSAR_SRS_COM.pdf
[8] Software Component Template AUTOSAR_TPS_SoftwareComponentTemplate.pdf
[9] Requirements on Gateway AUTOSAR_SRS_Gateway.pdf
[10] SpecificationofPDURouter AUTOSAR_SWS_PDURouter.pdf
[11] SpecificationofOperatingSystem AUTOSAR_SWS_OS.pdf
[12] SystemTemplate AUTOSAR_TPS_SystemTemplate.pdf
[13] SpecificationofRTESoftware AUTOSAR_SWS_RTE.pdf
[14] SpecificationofECUConfiguration AUTOSAR_TPS_ECUConfiguration.pdf
[15] SpecificationofCommunicationManager AUTOSAR_SWS_COMManager.pdf
[16] AUTOSAR Basic Software Module Description Template AUTOSAR_TPS_BSWModuleDescriptionTemplate.pdf
[19] SpecificationofCANTransportLayer AUTOSAR_SWS_CANTransportLayer.pdf
[20] SpecificationofFlexRayTransportLayer AUTOSAR_SWS_FlexRayTransportLayer.pdf
[21] List of Basic Software Modules, AUTOSAR_TR_BSWModuleList.pdf
[22] Generic Structure Template AUTOSAR_TPS_GenericStructureTemplate.pdf
[23] General Specification of Basic Software Modules AUTOSAR_SWS_BSWGeneral.pdf
[24] Specification of Software Cluster Connection AUTOSAR_SWS_SoftwareClusterConnection.pdf
## 3.2 RelatedStandardsandNorms
[17] ISO 17356-4:2005 Road vehicles -- Open interface for embedded automotive applications -- Part 4: OSEK/VDX Communication (COM)
[18] ISO 17356-6:2006 Road vehicles -- Open interface for embedded automotive applications -- Part 6: OSEK/VDX Implementation Language (OIL)


## 補足資料（Additions）
祝休日・謹賀新年：2024年の目標
https://qiita.com/kaizen_nagoya/items/b659d922327a7dcdc898

2023 Countdown Calendar 主催・参加一覧
https://qiita.com/kaizen_nagoya/items/c4c2f08ac97f38d08543

CountDownCalendar月間　いいねをいただいた記事群　views　順
https://qiita.com/kaizen_nagoya/items/583c5cbc225dac23398a

Countdown Calendar 2023, 百記事目を書くにあたって。
https://qiita.com/kaizen_nagoya/items/45185a04cfd88b71256a

1年間をまとめた「振り返りページ」＠２０２３
https://qiita.com/kaizen_nagoya/items/bcd1ebd49d3a9e8c7a90

AUTOSAR 文書番号
https://qiita.com/kaizen_nagoya/items/8b894228a0b76c2265c7

AUTOSAR Countdown Calendar 2023
https://qiita.com/advent-calendar/2023/autosar

AUTOSAR Abstract Platformへの道 R22-11
https://qiita.com/kaizen_nagoya/items/8ac2826635a8c536c7ec

自動車　記事　１００
https://qiita.com/kaizen_nagoya/items/f7f0b9ab36569ad409c5

Basic principles, ボッシュ自動車handbook(英語)11版まとめ<2>
https://qiita.com/kaizen_nagoya/items/24a1ba5da3d09b2a95d1

JAXA/IPA クリティカルソフトウェアワークショップ WOCS言語関連発表(改定版)
https://qiita.com/kaizen_nagoya/items/4789832baf494cb74626

＜この記事は個人の過去の経験に基づく個人の感想です。現在所属する組織、業務とは関係がありません。＞
This article is an individual impression based on the individual's experience. It has nothing to do with the organization or business to which I currently belong.


# 文書履歴(document history)
ver. 0.01 初稿 　20240104
### 最後までおよみいただきありがとうございました。
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#### Thank you very much for reading to the last sentence.
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