Differences between revisions 2 and 3

Workpackage: Communication/Logical Protocol

This page contains information about the Technical Workpackage Communication/Logical Protocol

Leader: Bernhard Tittelbach <xro AT realraum DOT at>

Telemetry Protocol Specification revision 249

Protocol Definition for TTX Beacon to Ground Stations
=====================================================


Introduction
------------

- using CW on FSK
- transceiver should send a beacon about every 60s
- transceiver sends acknowledge frame if requested
- parity 

Signs (Char Table)
------------------

!"$&'()+
,-./0123
456789:;
<=>?@ABC
DEFGHIJK
LMNOPQRS
TUVWXYZ

Base32 Coded Signs
------------------

   | 0 1 2 3 4 5 6 7 8 9 A B C D E F
-------------------------------------
00 | A B C D E F G H I J K L M N O P
10 | Q R S T U V W X Y Z 2 3 4 5 6 7

Beacon Frame:
-------------

'N'       (1 Sign)   .. Start Character (-.)
CALLSIGN  (4 Signs)  .. the satellites call sign (i.e. OE0M)
CNT       (3 Signs)  .. beacon counter (Base32)
STATE     (1 Sign)   .. Base32 coded bitfield
CMDQLEN   (1 Sign)   .. Number of commands in queue (Base32)
... tba
CHECKSUM  (1 Sign)   .. Parity Sign


 Bitfields
 ~~~~~~~~~

  STATE:

  LSB     RX_STATE   .. Payload Receiver State (0 = OFF, 1 = ON)
  ... tba
  MSB    

Acknowledge Frame
----------------

'A'       (1 Sign)   .. Start Character (.-)
CRXCODE   (1 Sign)   .. unscrambled command code from CRX
CHECKSUM  (1 Sign)   .. Parity Sign

Additional information possibly to be included in telemetry beacon:
(depending on final duration of beacon versus contact window duration)

Battery-voltage
Temperature
Solarcells-voltage
RTC Time
RX/TX Receiver status
RX/TX number of queued commands
current Energy Token Value

-  ⇤ ← Revision 2 as of 2012-02-23 22:09:01 → 
  Size: 1875
  Editor: xro
  Comment: Protocol Definition for TTX Beacon to Ground Stations
+   ← Revision 3 as of 2012-02-23 22:10:24 → ⇥
  Size: 1878
  Editor: xro
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 6:
-== Telematry Protocol Specification revision 249 ==
+== Telemetry Protocol Specification revision 249 ==
 Line 17:
-- transceiver sends a aknowledge frame if requested
+- transceiver sends acknowledge frame if requested
 Line 60:
-Aknowledge Frame
+Acknowledge Frame
 Line 70:
- * Batteryvoltage
+ * Battery-voltage
 Line 72:
- * Solarcellsvoltage
+ * Solarcells-voltage
 Line 74:
- * RX/TX Reciever Status
 * RX/TX numer of queued commands
+ * RX/TX Receiver status
 * RX/TX number of queued commands