DMR (Digital Mobile Radio) CSBK Notlarım

CSBK - Control Signalling Block

Bazı notlarım aşağıda

CSBK Adresleri

Bir CSBK mesajı şu hedeflere adreslenebilir

A specific radio (Individual ID)

A talkgroup (Group ID)

All radios (Broadcast)

A subset of radios depending on the CSBK type

DMR 24-bit adresler kullanır. Bazı özel adresler şöyle

0xFFFFFF (16777215) All Radios / Broadcast / All Call

0xFFFFFE (16777214) Reserved special address

0x000000 Often used as Null Address depending on context

CSBK Header

4 kısımda oluşur

1. lastBlock - 1 bit

2. protectedFlag - 1 bit

3. opCode - 6 bit

4. featureId (manufacturer)- 8 bit. Açıklaması şöyle

Also note that ETSI defines a second level of grouping through the FID (Feature ID) field. The same CSBKO value can have different meanings depending on the FID. ETSI reserves FIDs for standard features and manufacturer-specific features.

Ahoy Message

Value	Service Kind	Description
0x0	Individual Voice Call	Individual voice call
0x1	Talkgroup Voice Call	Talkgroup voice call
0x2	Individual Packet Data	Individual packet data service
0x3	Talkgroup Packet Data	Talkgroup packet data service
0x4	Individual Short Data	Individual short data service
0x5	Talkgroup Short Data	Talkgroup short data service
0x6	Short Data Polling	Poll for short data
0x7	Status Transport	Status transport service
0x8	Call Diversion	Call diversion
0x9	Call Answer	Answer an incoming call
0xA–0xC	Reserved	Reserved values
0xD	Supplementary Service	Supplementary service
0xE	Registration / Authentication / Radio Check	Registration, authentication or radio check
0xF	Cancel Call	Cancel an existing call

UDT (Unified Data Transport)

Açıklaması şöyle

UDT (Unified Data Transport) is used in DMR to transfer short data messages between radios or between a radio and an application/system.

Typical use cases

1. Text messages between radios.

2. GPS/location information (NMEA).

3. Predefined status information.

4. Binary application data.

5. Address or identification information.