Framing
If the transmission is temporarily interrupted, or a bit slip event occurs, the receiver must re-synchronize.
The transmitter and the receiver must agree ahead of time on which frame synchronization scheme they will use.
Common frame synchronization schemes are:
- Framing bit
- A common practice in telecommunications, for example in T-carrier, is to insert, in a dedicated time slot within the frame, a noninformation bit or framing bit that is used for synchronization of the incoming data with the receiver. In a bit stream, framing bits indicate the beginning or end of a frame. They occur at specified positions in the frame, do not carry information, and are usually repetitive.
- Syncword framing
- Some systems use a special syncword at the beginning of every frame.
- CRC-based framing
- Some telecommunications hardware uses CRC-based framing.
Read more about this topic: Frame Synchronization
Famous quotes containing the word framing:
“In framing a government which is to be administered by men over men ... you must first enable the government to control the governed; and in the next place oblige it to control itself.”
—James Madison (1751–1836)