System Functions
The CCC includes, amongst others, the following functions:
- CCC aerial tuner (CCC-ANT)
- Radio
- CCC applications (CCC-A)
- DVD navigation system Professional
- Voice recognition system
- TV function
- Online services
- Telephone
- Telematic
- CD changer
- CCC gateway (CCC-GW)
- System master
- Power master
- Network master
- CCC audio system controller (CCC-ASK)
- Audio master
- Connection master
- CCC user interface (CCC-BO)
CCC aerial tuner
- Radio
The "radio" function is implemented in a two-tuner radio. Tuner 1 is principally responsible for radio reception. Tuner 1 receives the radio frequencies FM (VHF) and AM (MW, SW and LW). The radio waves from the radio station are received by the aerials in the rear window. Aerial diversity (on the rear window) feeds the HF signals received to the aerial input of the two-tuner radio via a coaxial cable.
While tuner 1 receives the radio station required, tuner 2 continues to work in the background. Tuner 2 searches the station frequencies for additional signals. If a radio station transmits a stronger signal on another frequency, tuner 2 automatically switches to this alternative frequency.
Tuner 2 receives additional information from the Radio Data System (RDS) and from the Traffic Message Channel (TMC). The additional RDS and TMC information is transmitted together with the signal from the FM radio station. TMC information is used by the navigation system to detect tailbacks and traffic congestion. If an AM station is selected, tuner 2 will continue to receive RDS traffic information announcements from an FM station. The station is faded out and the traffic information announcement is output through the loudspeakers. Tuner 2 also generates a list of all RDS radio and traffic information stations that can be received.
CCC applications
- Professional navigation system
The Professional navigation system is integrated in the CCC. There is no longer a separate navigation system. The Professional navigation system has the following new features:
- Map information on DVD
- Complete display of Europe and US
- Several scales 1000 km, 500 km, ...
- Dynamic route planning
Navigation data can be displayed in the left-hand area of the CID screen or on the right in the secondary screen. The left-hand area of the screen has a resolution of 400x240 pixels. The secondary screen has a resolution of 240x240 pixels. Navigation data can be displayed in the following form:
- Map with northward orientation
- Map orientated to direction of travel
- Arrow display
- Location
In addition to the navigation data, the following information can be displayed on the secondary screen:
- Travel computer
- On-board computer
The following components are integrated in the CCC for the "DVD Professional navigation system":
- DVD player for reading map information
- HIP module for receiving satellite signals
- Yaw-rate sensor for precise location identification
The navigation system software is fitted in the CCC. The navigation system uses the memories and processors in the CCC. The navigation system uses the Traffic Message Channel to detect tailbacks and traffic congestion. If a tailback or traffic congestion is detected, an alternative route around the hindrance is computed. The system has its own diagnosis address.
GPS satellites
GPS satellites move around the earth in 6 nearly circular orbits. There are 4 GPS satellites per orbit, therefore there is a maximum number of 24 GPS satellites. Before the navigation system can process the reference signal from the GPS satellites (minimum 4 GPS satellites), the Almanac data must first be loaded.
Loading Almanac data
The Almanac data delivers the following data and information to the navigation system:
- UTC (Universal Time Coordinate)
- Date
- Location of the GPS satellites
- Orbits
- Operational capacity of the GPS satellites
Once the navigation system has been switched on for the first time (terminal R ON) the GPS satellite Almanac data is received and loaded. The loading time depends on the number of "visible" GPS satellites and can take up to 20 minutes during the adaptation phase. Otherwise the Almanac data is permanently stored in the system.
- Radio
- Transportation from the Dingolfing works.
- Return transport from abroad in the case of damage.
- Transporting the vehicle on a train.
- Shutdown of the micro power module if the idle current is violated
Navigation in the adaptation phase is possible when the vehicle is stationary or in motion. Navigation is highly inaccurate at first. After a long period of time or a long journey, the end of the adaptation phase, and thus the maximum accuracy of the navigation, is reached. When the Almanac data is loaded, the navigation system is ready for operation 10 to 15 seconds after starting each time.
- Voice recognition system
A voice recognition system (SVS) is integrated in the CCC. The SVS can be used to operate all buttons that are displayed in the CID by means of voice commands. The advantage of this is that the driver does not have to take his/her hands off the steering wheel to change the settings during a journey. The SVS can be used to control the following systems:
- Entertainment
- Communication
- Navigation
- Climate
- Settings
There are specified voice commands that are used for the SVS. SVS engages in a dialogue with the user. If a command is not understood, an appropriate warning will be given.
The SVS software is installed in the CCC. SVS uses the memories and processors in the CCC. The system is activated/deactivated with the push-to-talk button on the multi-function steering wheel or with the controller. Voice commands are input through a separate microphone that is directly connected to the CCC.
- TV function (E60 only)
The CCC TV function is available as special equipment (option 601 "TV function"). The Central Information Display (CID) in the dashboard acts as a screen for the TV function.
CCC gateway
The CCC Gateway control unit forms the interfaces for data exchange between the MOST bus and the K-CAN. The two bus systems use different data transfer rates and data formats. To communicate with all systems, data for each bus is configured as necessary in the CCC gateway.
- System master
The system master connects the individual control units in the CCC.
- Power master
The power master initializes the network and switches the MOST bus on and off (wake-up, sleep mode).
- Network master
The network master controls and monitors the MOST bus. Each time the network is started, the exact system configuration is recorded and compared with a stored target configuration. If systems do not work correctly, these are reset and separated from the MOST bus. Any operating fault in the network or any deviation from the target configuration is stored in a fault memory for the MOST bus.
CCC user interface
The CCC user interface control unit contains the operating system for controlling the CCC. Signals from the controller for selecting the menus and submenus are processed in the CCC user interface control unit. To actuate the CID, the red-green-blue signals from the graphics processor are converted into Low Voltage Differential Signalling (LVDS) digital signals.
CCC audio system controller
- Audio master
The audio master collects all the audio signals in the vehicle, processes the audio signals and outputs them over the loudspeakers. The audio master also produces additional audible signals for warnings and for Park Distance Control (PDC). By mixing or fading in and out, a "softer" audible change is obtained between the signal sources.
- Connection master
The connection master distributes the signals of the audio sources and the audible signals to the loudspeakers. The signals are transmitted to the loudspeakers in the following way:
- Front left and right (audible signals, telephone, gong, messages from the navigation system, traffic information announcements)
- Front left and right, rear left and right (PDC signals)
- All loudspeakers (all sources in the "Entertainment" menu)