Editing Communication channel (section)

===Digital channel models===
In a digital channel model, the transmitted message is modeled as a [[digital signal]] at a certain [[protocol layer]]. Underlying protocol layers are replaced by a simplified model. The model may reflect channel performance measures such as [[bit rate]], [[bit error]]s, [[Network delay|delay]], [[delay variation]], etc. Examples of digital channel models include:
* [[Binary symmetric channel]] (BSC), a discrete memoryless channel with a certain [[bit error probability]]
* [[Binary asymmetric channel]] (BAC), similar to BSC but the probability of a flip from 0 to 1 and vice-versa is unequal
* Binary [[Burst error|bursty bit error]] channel model, a channel ''with memory''
* [[Binary erasure channel]] (BEC), a discrete channel with a certain bit error detection (erasure) probability
* [[Packet erasure channel]], where packets are lost with a certain [[packet loss]] probability or [[packet error rate]]
* [[Arbitrarily varying channel]] (AVC), where the behavior and state of the channel can change randomly