| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: incoming/outgoing call history data and phonebook data are transmitted to a loudspeaker device (1) for use in a vehicle at a predetermined point in time to obtain updates of incoming/outgoing call history data of a cellular telephone (10) almost in real time. Using simultaneous connection of HFP and PBAP, the loudspeaker device (1) establishes a Bluetooth connection with the cellular telephone (10) first through HFP and then establishes another connection through PBAP, simultaneously, to receive incoming/outgoing call history data stored before establishing the Bluetooth connection from the cellular telephone (10). The incoming/outgoing call history data are received before receiving phonebook data by controlling the process of transmitting data of information connection protocol. The loudspeaker device (1) can set up calls using incoming/outgoing call history data stored in random-access memory (6), after receiving said data.EFFECT: eliminating the excess data transmission process.5 cl, 10 dwg |
