DSC_48The DSRC-VU shall support the ‘Freight and Fleet’ application, identified by the Application Identifier ‘2’. Other Application Identifiers may be supported, but shall not be present in this VST, as the BST only requires AID=2. The ‘Applications’ field contains a list of the supported application instances in the DSRC-VU. For each supported application instantiation, a reference to the appropriate standard is given, made of an Rtm Context mark, which is composed of an OBJECT IDENTIFIER representing the related standard, its part (9 for RTM) and possibly its version, plus an EID that is generated by the DSRC-VU, and associated to that application instance.U.K.
A practical example of the settings specified in Table 14.8, with an indication of bit encodings, is given in Table 14.9.
| Table 14.9 | |||
| Initialisation — VST frame contents example | |||
| Octet # | Attribute/Field | Bits in octet | Description |
|---|---|---|---|
| 1 | FLAG |  | Start flag |
| 2 | Private LID |  | Link address of the specific DSRC-VU |
| 3 |  | ||
| 4 |  | ||
| 5 |  | ||
| 6 | MAC Control field |  | Command PDU |
| 7 | LLC Control field |  | UI command |
| 8 | Fragmentation header |  | No fragmentation |
| 9 | VST SEQUENCE { |  | Initialisation response |
| Fill BIT STRING (SIZE(4)) |  | Unused and set to 0 | |
| 10 | Profile INTEGER (0..127,...) Applications SEQUENCE OF { |  | No extension. Example profile 0 |
| 11 |  | No extension, 1 application | |
| 12 | SEQUENCE { | ||
| OPTION indicator |  | EID present | |
| OPTION indicator |  | Parameter present | |
| AID DSRCApplicationEntityID |  | No extension. AID= 2 Freight&Fleet | |
| 13 | EID Dsrc-EID |  | Defined within the OBU and identifying the application instance. |
| 14 | Parameter Container { |  | No extension, Container Choice = 02, Octet string |
| 15 |  | No extension, Rtm Context Mark length = 8 | |
| 16 | Rtm-ContextMark::= SEQUENCE { StandardIdentifier standardIdentifier |  | [F1Object Identifier of the supported standard, part, and version. Example: ISO (1) Standard (0) TARV (15638) part9 (9) Version1 (1). First octet is 06H, which is the Object Identifier. Second octet is 06H, which is its length. Subsequent 6 octets encode the example Object Identifier.] |
| 17 |  | ||
| 18 |  | ||
| 19 |  | ||
| 20 |  | ||
| 21 |  | ||
| 22 |  | ||
| 23 |  | ||
| 24 | ObeConfiguration Sequence { | ||
| OPTION indicator |  | ObeStatus not present | |
| EquipmentClass INTEGER (0..32767) |  | ||
| 25 |  | ||
| 26 | ManufacturerId INTEGER (0..65535) |  | Manufacturer identifier for the DSRC-VU as described in ISO 14816 Register |
| 27 |  | ||
| 28 | FCS |  | Frame check sequence |
| 29 |  | ||
| 30 | Flag |  | End Flag |