d-star:data
This is an old revision of the document!
Table of Contents
Data frames in D-Star
Data Frames in D-Star
Mini header
| Value | Scope | Usage | Remarks |
|---|---|---|---|
| 0X | Reserved | ||
| 1X | Reserved | ||
| 2X | Reserved | ||
| 3X | 1~5 | Simple data communication | Data communication of D-PRS used for character transfer of user's data communication such as PC-handled simple data communication. The range indicates the number of valid characters per block. |
| 4X | 0~3 | Message function | Use it for messages handled by radio unit alone. Only the message function indicates the data block number |
| 5X | 2 | Wireless header retransmission | |
| 6X | Reserved | Except for 66 | |
| 66 | Null packet | Padding data frame | |
| 7X | Reserved | ||
| 0X | 1~F | Fast Data | Indicates Fast data length from 1 byte to 15 bytes |
| 9X | 0~C | Fast Data | Indicates Fast data length from 16 byte to 28 bytes |
| AX | Reserved | ||
| BX | Reserved | ||
| CX | 2 | Code squelch | Two-digit value of code squelch |
| EX | Reserved | ||
| FX | Reserved |
For 8x and 9x, refer to the chapter related to Fast Data.
Simple data
When communicating using simple data communication, the following characters can not be used:
- 0x00
- 0x11 (XON)
- 0x13 (XOFF)
- 0x76 (Used for packet loss notification)
- 0x84 (Used for packet loss notification)
- 0xE7 (Used for packet loss notification)
- 0xFE
Note: Handle as packet loss when the data frame is the following string “0xE7, 0x84, 0x76” and the voice frame is the silence pattern “0x9E, 0x8D, 0x32, 0x88, 0x26, 0x1A, 0x3F, 0x61, 0xE8” It can not be used. (See “Packet loss”).
Example of data configuration on the transmitting side / receiving side when transferring user's data communication by simple data communication
d-star/data.1542309126.txt.gz · Last modified: 2018/11/15 19:12 by f4hof