Background
•
What is RIL ?
–
RIL is the abbreviation of Android's Radio Interface Layer (RIL),
–
it provides an abstraction layer between Android telephony services (
android.telephony) and radio hardware.
–
It consists of two primary components RIL Daemon and Vendor RIL.
–
RIL Daemon
•
it initializes the Vendor RIL,
•
and processes all communication from Android telephony services, and dispatches calls to t
he Vendor RIL as solicited commands.
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Solicited Request, all the request that sent by RILJ belong this category. For example : dial,
hung up send SMS
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Vendor RIL
•
It initialize the baseband device
•
and processes all communication with radio hardware and dispatches calls to the RIL Daem
on (rild) through unsolicited commands.
•
Unsolicited Request, the event that coming from outside. For example : incoming calling, M
S change BS, signal strength
•
The purpose of this section is to introduce RIL control flow, but not includes v
oice and packet services.
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2012-06-04
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zhangshanmin2012-08-15PPT做的很精致 内容也正是我需要的
