A system for providing roadside and emergency assistance to a vehicle includes a vehicle unit with several connectivity options. The optical waveguide includes a plurality of modulator circuits configured along a silicon optical transmission channel. The reinforcing device may include a first bracket provided at a predetermined position between the body cap and the main body to increase a force to fasten the drive motor to the main body, and the reinforcing device may include a locking element for assembling the body cap, the first bracket, and the drive motor with the main body into a single or unitary body. The concept of micro mobility within this context eases routing packets to the mobile node while its moves within the foreign network. In a similar system, a computational method comprises multiplying two numbers and manipulating at least one of the most significant bits of the number resulting from the multiplication to produce an output.