mirror of git://git.sysmocom.de/ofono
doc: Updated and clarified overview
Refined scope of the project, added smart messaging and push notification, fixed typos and added IMS UA as an out-of-scope item.
This commit is contained in:
Aki Niemi
parent
074f1ff516
commit
457b051928
|
|
@ -2,17 +2,23 @@ oFono - Open Source Telephony
|
|||
*****************************
|
||||
|
||||
Copyright (C) 2008-2010 Intel Corporation. All rights reserved.
|
||||
Copyright (C) 2009-2011 Nokia Corporation and/or its subsidiary(-ies).
|
||||
|
||||
|
||||
Mission statement
|
||||
=================
|
||||
|
||||
The overall goal of the oFono project is to create a telephony host stack
|
||||
The overall goal of the oFono project is to create an open telephony stack
|
||||
for embedded/mobile and desktop systems based on Linux.
|
||||
|
||||
It currently targets GSM/UMTS User Equipment (UE) based on 3GPP standards,
|
||||
but is of course not limited to that. Extensions for other telephony systems
|
||||
like CDMA/EVDO are more than welcome.
|
||||
It currently targets supporting User Equipment (UE) supporting GSM/UMTS and LTE
|
||||
based on 3GPP specifications as well as CDMA/EVDO based on 3GPP2 specifications.
|
||||
|
||||
The oFono stack delegates implementation of the actual cellular protocol stack
|
||||
(L1-L3) to a modem firmware. Communication with the modem typically uses
|
||||
standard AT commands (3GPP TS 27.007) via a serial interface. Proprietary
|
||||
control protocols such as the Intelligent Serial Interface (ISI) can also be
|
||||
supported.
|
||||
|
||||
Within oFono there is clear abstraction between the application interfaces
|
||||
based on D-Bus, the hardware level (via drivers) and the integration with
|
||||
|
|
@ -23,14 +29,11 @@ flexible.
|
|||
Telephony features
|
||||
==================
|
||||
|
||||
The oFono stack will support the majority of the features from the 3GPP
|
||||
specification, but not all of them. The whole standard is pretty complex
|
||||
and some features are not used in any mobile network so far, some of them
|
||||
are outdated and have no relevance anymore. This paragraph tries to give
|
||||
some insights on what has been implemented so far, what is coming in the
|
||||
future and especially what will not be part of oFono.
|
||||
This paragraph lists features that have been implemented so far, features that
|
||||
are going to be supported in the future, and especially features that will not
|
||||
be part of oFono.
|
||||
|
||||
Current implemented features:
|
||||
Implemented features:
|
||||
|
||||
Modem abstraction
|
||||
|
||||
|
|
@ -39,7 +42,8 @@ Current implemented features:
|
|||
The "atmodem" driver handles hardware based on the 3GPP
|
||||
TS 27.007 standard.
|
||||
|
||||
The "isimodem" driver handles Nokia based PhoNet modems.
|
||||
The "isimodem" driver handles hardware based on the ISI
|
||||
protocol.
|
||||
|
||||
Network registration
|
||||
|
||||
|
|
@ -73,7 +77,7 @@ Current implemented features:
|
|||
Advanced voice call control
|
||||
|
||||
Features like COLR/CLIR/CLIP/COLP are supported by the
|
||||
voice call handling interface.
|
||||
voice call handling interface.
|
||||
|
||||
The support for call forwarding and call waiting is also
|
||||
present.
|
||||
|
|
@ -90,11 +94,11 @@ Current implemented features:
|
|||
Phonebook support
|
||||
|
||||
The storage of the SIM card is not used. The only supported
|
||||
feature is to export the contacts stored on the SIM card to
|
||||
some third-part entity.
|
||||
features are to allow simple import and export of the contacts
|
||||
stored on the SIM card to some third-part entity.
|
||||
|
||||
SIM card storage is limited, slow and not flexible enough
|
||||
for modem telephony applications.
|
||||
for modern telephony applications.
|
||||
|
||||
Short message service
|
||||
|
||||
|
|
@ -130,42 +134,35 @@ Current implemented features:
|
|||
enabling and disabling fast dormancy on hardware that support
|
||||
this feature.
|
||||
|
||||
Work in progress features:
|
||||
Smart Messaging
|
||||
|
||||
Support for sending and receiving business cards (vCard) and
|
||||
appointments (vCalendar) is available using the SmartMessaging
|
||||
interface.
|
||||
|
||||
Push Notification
|
||||
|
||||
Support for receiving push notifications (OMA Push over SMS) is
|
||||
available using the PushNotification interface.
|
||||
|
||||
USSD
|
||||
|
||||
User initiated USSD support is available, but not
|
||||
network-initiated USSD support.
|
||||
|
||||
Not implemented features:
|
||||
Work in progress:
|
||||
|
||||
SIM card storage
|
||||
SIM application toolkit
|
||||
|
||||
The SIM card storage will not be used by oFono. It is slow,
|
||||
limited in size and flexibility. It is an outdated interface
|
||||
that makes no sense in a modern telephony system.
|
||||
Basic support for SIM toolkit exists.
|
||||
|
||||
Export of stored contacts from the SIM card is supported for
|
||||
legacy reasons and to allow a smooth transition.
|
||||
Out-of-scope features:
|
||||
|
||||
WAP support
|
||||
|
||||
The WAP feature is outdated and using full Internet access
|
||||
with an embedded browser is the future.
|
||||
|
||||
MMS support
|
||||
|
||||
The MMS support should not be part of oFono itself. The best
|
||||
idea is to implement a MMS service that runs in the user
|
||||
session and uses oFono's SMS interface to listen for
|
||||
notifications.
|
||||
|
||||
Similar to the split between BlueZ and OBEX daemon.
|
||||
|
||||
Especially when it comes to image conversion and other tasks
|
||||
that MMS support requires it is important to NOT do this as
|
||||
a system daemon.
|
||||
|
||||
EMS support
|
||||
|
||||
This is an Ericsson specific standard and not widely spread
|
||||
|
|
@ -173,11 +170,12 @@ Not implemented features:
|
|||
|
||||
Video telephony
|
||||
|
||||
Currently there are no plans to support this. The support
|
||||
from the networks and available handsets are still limited.
|
||||
The support from mobile networks and available handsets is
|
||||
still limited, and the feature is considered legacy.
|
||||
|
||||
This needs re-evaluation once such a service becomes more
|
||||
prominent.
|
||||
|
||||
A similar split like with MMS might be a good idea.
|
||||
IP Multimedia Subsystem
|
||||
|
||||
Implementing full IMS client support is not in scope for the
|
||||
oFono project. However, oFono will provide some mandatory
|
||||
supporting features for IMS, such as an interface for running
|
||||
IMS AKA authentication on the ISIM/USIM.
|
||||
|
|
|
|||
Loading…
Reference in New Issue