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# <a name="SSEM-PDU-Descriptions"></a>ASN.1 module SSEM-PDU-Descriptions
OID: _{ itu-t (0) identified-organization (4) etsi (0) itsDomain (5) wg1 (1) ts103301 (103301) ssem (4) version2 (2) }_
draft 001 of the SSEM-PDU-Descriptions module for TS 103 831 V2.2.1 integrating:
initial revision based on ASN.1 files of [ISO TS 19091] and [SAE J2735]
## Imports:
* **[ETSI-ITS-DSRC](ETSI-ITS-DSRC.md)** *{ itu-t (0) identified-organization (4) etsi (0) itsDomain (5) wg1 (1) ts103301 (103301) dsrc (6) version2 (2) } WITH SUCCESSORS*<br/>
Includes from ETSI-ITS-DSRC* **[ETSI-ITS-CDD](ETSI-ITS-CDD.md)** *{ itu-t (0) identified-organization (4) etsi (0) itsDomain (5) wg1 (1) 102894 cdd (2) major-version-4 (4) minor-version-1 (1) } WITH SUCCESSORS*<br/>
Include ETSI TS 102 894-2 (ETSI-ITS-CDD)## Data Elements:
Signal status extended Message
This DF includes DEs for the SSEM: protocolVersion, the SSEM message type identifier _messageID_ and
the station identifier _stationID_ of the originating ITS-S and the signal status data from ETSI-ITS-DSRC.
* _header_ of type [**ItsPduHeader**](ETSI-ITS-CDD.md#ItsPduHeader) <br>
The DE _protocolVersion_ is used to select the appropriate protocol decoder at the receiving ITS-S. It shall be set to 2.
The DE _messageID_ shall be ssem(10).
* _ssm_ of type [**SignalStatusMessage**](ETSI-ITS-DSRC.md#SignalStatusMessage) <br>
The DE _ssm_ contains the Signal status data as defined in ETSI-ITS-DSRC.
**Categories:** Basic Information
**Revision:** _V1.3.1_