Bluetooth Packet
device access code (DAC) | used during page, page scan and page response substates and shall be derived from the paged device’s BD_ADDR |
channel access code (CAC) | used in the CONNECTION state and forms the beginning of all packets exchanged on the piconet physical channel; shall be derived from the LAP of the master’s BD_ADDR |
inquiry access code (IAC) | one general IAC (GIAC) for general inquiry operations and 63 dedicated IACs (DIACs) for dedicated inquiry operations |
Type | Consistency | Description |
---|---|---|
ID | DAC or IAC | |
NULL | CAC and packet header | The NULL packet may be used to return link information to the source regarding the success of the previous transmission (ARQN), or the status of the RX buffer (FLOW). |
POLL | CAC and packet header | Upon reception of a POLL packet the slave shall respond with a packet even when the slave does not have any information to send unless the slave has scatternet commitments in that timeslot. This return packet is an implicit acknowledgement of the POLL packet. |
page revision: 8, last edited: 20 Jan 2011 12:44