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Applications

In-Car Mobile and Wi-Fi Connectivity

The OS81118, in combination with a 3G/Long Term

Evolution (LTE) and Wi-Fi module, can be used to create a

system that allows for in-car mobile and Wi-Fi connectivity.

The 3G/LTE and Wi-Fi module connects to the USB Port

of the OS81118, which is able to process all data types

required to implement this system.

In the application diagram below, (Figure 2) the 3G/LTE

and Wi-Fi module receives IP data over an external

antenna. The data is forwarded over USB to the OS81118,

which connects to the MOST network.

While the IP data is transmitted over the MOST Ethernet

Channel, Voice-Over IP (VOIP) data is transferred over

the MOST Quality of Service (QoS) IP channels. Control

data, required to setup the behavior of a MOST device, is

handled over the MOST Control Channel. Since different

communication paths are used to separate IP data from

control data, the requirements for in-car security and

safety can be fulfilled; even if IP data is impaired from

outside the car, control data communication inside the car

on the MOST network will not be affected.

Head Unit, Rear-Seat Entertainment systems, and peripheral

devices, including cellphones and tablets, which are

connected to the MOST network can send and/or receive IP

data for applications such as internet radio, e-mail, social

networking, games, navigation, and local services.

Depending on the requirements given by the cable harness

and the positioning of the device, either the optical physical

layer or coax physical layer can be used.

Figure 2: In-Car Mobile and Wi-Fi Connectivity

OS81118 INIC

USB

Device Interface

Host Interface

Development of Head Unit Designs Based on the

Latest Multi-Core Consumer SoC

The OS81118, with its USB port, is an ideal solution

which provides a high level of flexibility for designers

creating Head Units. The most up-to-date multi-core SoCs,

which have USB interfaces, but may not have standard

automotive interfaces, can now be incorporated into the

Head Unit design when matched with an OS81118.

Automotive and MOST device specific functionality, as

provided by the MOST NetServices, can be implemented on

the Vehicle Central Processing Unit (VCPU). Either MediaLB

between the VCPU and the OS81118.

Multimedia-specific applications such as audio, video, and

IP all run on the SoC. To maximize efficiency, the SoC

utilizes the USB Port for IP and isochronous data transfer

with the MOST network, whereas the OS81118 Streaming

between SoC or Tuner IC/DSP and the MOST network.

Figure 3: Head Unit Design

Controller

Port

Multi-Core SoC

OS81118 INIC

VCPU

Tuner IC/DSP

Streaming Port

Streaming Port

USB Port

Head Unit