Before revision: An information element, sometimes informally referred to as a field, is a key building block of a wireless message sent between a base transceiver station and a mobile phone or similar piece of user equipment .
After revision: An information element, sometimes informally referred to as a field, is an item in Q.931 messages, IEEE 802.11 management frames, and cellular network messages sent between a base transceiver station and a mobile phone or similar piece of user equipment