Bluetooth Multiplexing Technology In Mobile Phones With Dual SIM Cards And Dual Standby Modes

With the development of telecom technology and multiple networkplatforms, people can customize the service from different networkoperators seamlessly. The technology of mobile phone with dual SIM cardsand dual standby modes is becoming an approach of call Qos improvement,network availability and cost savings and also accelerates the foundation ofmulti-platform product chain on mobile phones with its platform opening. Itis obviously a trend that the bluetooth function is integrated in the phones.The key of bluetooth multiplexing technology in mobile phones withdual SIM cards and dual standby modes is to solve the problem of signalintegrity, electromagnetic compatibility and low power consumption in theintegration of multiple sub-systems in high density PCB. Whether samenetworks or cross ones must accord with the same principle to call forservice and share data. This solution provides high bluetooth call qualitywith the improving of correct signal timing and voltage response. Tocombine the task scheduling and deadline power management policy willenhance the power efficiency of cell phone, and extend the standby time.The most important character is the wireless network platformconcealing. Each platform looks like a black box, the system task will beachieved by the interface of task scheduling. Furthermore, in this design theadditional audio codec isn’t needed and the low-cost secondary modulewithout bluetooth options is enough. This solution brings a new channel tofast develop low-cost and multi-function products to design houses.