multiplexed between these two protocol layers of fig3 in a synchronized manner devices which possess the one chip dual mode ieee 802 11 and bluetooth wireless radio interface chip are referred to as bluetooth wireless gateways bwgs the synchronization of the multiplexing is accomplished by utilizing the available bluetooth operational modes described above the rac protocol layer is responsible for negotiating with both the 802 11 mac and the bluetooth lmp protocol illustrated in fig3 the rac protocol layer maintains the schedule of both the bluetooth and ieee 802 11 systems and puts the respective system in the appropriate operational mode to coordinate medium access this schedule is established according to the requirements of the application and may be changed dynamically as the requirements of the application change the rac protocol layer instructs the bluetooth and ieee 802 11 protocol layer to enter a specific operational mode in accordance to a specific communication scenario these scenarios include an ieee 802 11 only scenario a bluetooth only scenario a cooperative data scenario and a cooperative voice scenario the ieee 802 11 only scenario is a situation in which applications requiring only internet access provided by the ieee 802 11 network have their bluetooth protocol stack put into park mode by the rac protocol.