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Background
==========

- Priority scale: High, Medium and Low

- Complexity scale: C1, C2, C4 and C8.  The complexity scale is exponential,
  with complexity 1 being the lowest complexity.  Complexity is a function
  of both task 'complexity' and task 'scope'.

  The general rule of thumb is that a complexity 1 task should take 1-2 weeks
  for a person very familiar with oFono codebase.  Higher complexity tasks
  require more time and have higher uncertainty.

  Higher complexity tasks should be refined into several lower complexity tasks
  once the task is better understood.


SMS
===

- Add support for Enhanced SMS (EMS) from 3GPP 23.040.  These SMS messages
  support a richer set of formatting elements, including bold/italic and
  font size selection.  Embedding images and sounds into the SMS is also
  supported.  This task should add support for receiving such SMS messages.

  Proposed solution is to convert such messages to HTML and embed image /
  sound data as embedded MIME in the generated HTML stream.  The EMS messages
  will have to be detected (by the presence of particular tags in the SMS)
  and signaled separately from simple SMS messages.

  Priority: Low
  Complexity: C8

- See / Cancel pending SMS messages over DBus.  When oFono sends SMS messages
  the method call is only returned when the message has been submitted to the
  network.  Instead we should return an object path and allow cancellation of
  pending messages.

  Priority: High
  Complexity: C2
  Owner: Yang Gu <yang.gu@intel.com>

- Persist outgoing SMS messages.  Currently oFono persists incoming messages
  that are fragmented.  However oFono does not persist queued outgoing
  messages.  oFono should persist such messages and restore / requeue them
  on the next oFono startup.

  Priority: High
  Complexity: C1
  Owner: Kristen Carlson Accardi <kristen@linux.intel.com>

- Asynchronously acknowledge SMS DELIVER messages sent by the SMS driver
  to core using ofono_sms_deliver_notify().  This may require the struct
  ofono_sms_driver to be extended with one more function pointer like:
    void (*deliver_ack)(unsigned char *pdu, int len, cb_t cb, void *data)
  because currently messages are automatically acknowledged by either the
  modem (this is the case of some AT modems) or the driver right after
  ofono_sms_deliver_notify() and a failure to deliver at an upper level is
  ignored.  The PDU can be an RP-ACK or RP-ERROR message with optional
  TP-User-Content element, for example if returned from USIM Data Download.

  Priority: Low
  Complexity: C2

SIM / SIM File system
=====================

- SIM Call History plugin.  New UICCs support four new SIM elementary files
  for storing call history information on the SIM: EFici, EFict, EFoci, EFoct.
  A plugin should be developed for oFono that will write to these files.

  Priority: Low
  Complexity: C2

- Support proprietary extensions for SIM PIN retry counter.  Most vendors
  provide an extension commands to obtain such a retry counter for PINs and
  PUKs.  Need to enable this as a property in oFono.

  Priority: Low
  Complexity: C2
  Owner: Lucas De Marchi <lucas.demarchi@profusion.mobi>

- Add support for SIM 'ready' notifications from the driver to the core.  Most
  modem manufacturers initialize the SIM (e.g. cache SIM file system, STK
  initialization, etc) internally before allowing the telephony stack to
  access these portions.  When the PIN is locked, this can lead to oFono being
  too fast for the modem and asking it for things before the firmware is ready.

  The proposal is to introduce a new sim function:
    void ofono_sim_ready_notify(struct ofono_sim *sim);

  When oFono determines the SIM PIN is READY, it checks whether
  ofono_sim_ready_notify has been called.  If it hasn't, then it stalls the
  initialization procedure (and calling post_sim) until
  ofono_sim_ready_notify is called.

  Priority: High
  Complexity: C2
  Owner: Pekka Pessi <pekka.pessi@nokia.com>

- Check SIM pin status if sim_change_pin fails. If it is anything other than
  READY, we must tear the state back to pre_sim state and set the modem offline.

  Priority: Medium
  Complexity: C1
  Owner: Marit Henriksen <marit.henriksen@stericsson.com>

Modem Emulator
==============

- Support HFP AG emulator.  We should provide a new HFP_AG_EMULATOR atom type
  that will implement the Bluetooth HFP AG profile.  Voicecall atom, netreg
  atoms can register command handlers for this atom appropriately.

  Complexity: C4
  Priority: Medium

- Support extensions to HFP AG emulator.  Some carkits support additional
  AT command extensions to the Bluetooth HFP AG standard.  Refer to CE4A
  white paper: "AT-commands for Automotive Premium Phone Integration".
  Plugins can register additional command handlers appropriately to handle
  such commands.

  Complexity: C4
  Priority: Medium
  Depends: HFP AG emulator

- Support HSP AG.  Similar to HFP AG emulator but implements the much reduced
  Bluetooth HSP AG profile.

  Priority: Low
  Complexity: C1

- Support DUN emulator. Implement the Bluetooth DUN profile with only mandatory
  AT command support. Implement USB DUN as well.

  Complexity: C4
  Priority: Medium
  Owner: Gustavo F Padovan <padovan@profusion.mobi>

  Depends: PPP Server mode

- Support Bluetooth SPP profile.

  Complexity: C4
  Priority: Medium


Flight Mode
===========

- Flight Mode support.  Add an 'Online' property to the Modem interface that
  will control the online state of the modem.  When Online state is True all
  atoms are available.  When Online state is False, all network related items
  are removed (e.g. CallSettings) or enter into reduced functionality set
  where only the SIM is available (e.g. DataConnectionManager, SimManager, etc)

  Complexity: C4
  Priority: High
  Owner: Pekka Pessi <pekka.pessi@nokia.com>


GPRS
====

- PPP Server support.  Extend GAtPPP to support PPP Server role, similarly to
  how existing GSM modems support PPP GPRS contexts.

  Priority: High
  Complexity: C2

- IPv6 CP support.  To support IPv6 based GPRS contexts via PPP, GAtPPP
  needs to be updated to support IPv6CP from RFC 2472.

  Priority: Low
  Complexity: C4

- Add support for IPv6 GPRS contexts.

  Priority: Medium
  Complexity: C1


Location Services
=================

- Neighbor Cell Info.  Add dedicated atom, D-Bus API and atom driver(s) for
  Neighbor Cell information.

  This feature is not discussed in 27.007, thus manufacturer specific commands
  are required.

  Complexity: C4
  Priority: Medium
  Owner: Aki Niemi <aki.niemi@nokia.com>


Supplementary Services
======================

- Closed User Group (CUG) support.

  Priority: Low
  Complexity: C8

- Call Completion to Busy Subscriber (CCBS) support

  This feature is not discussed in 27.007, thus manufacturer specific commands
  are required.

  Priority: Low
  Complexity: C8

- User to User Signaling (UUS) support

  Priority: Low
  Complexity: C8

- Multiple Subscriber Profile (MSP) support

  Priority: Low
  Complexity: C2

- Called Line Identification.  This affects both call_settings and voicecall
  atoms.  3GPP service is accessed by the +CDIP command.

  Priority: Low
  Complexity: C4
  Owner: Lucas De Marchi <lucas.demarchi@profusion.mobi>

- CPHS Support.  This includes ALS and CPHS specific elementary files.

  Priority: Low
  Complexity: C8


Voicecall
=========

- Supplementary service notifications on remote party actions:
  - call has been put on hold (+CSSU: 2)
  - call has been retrieved (+CSSU: 3), and
  - joining call to a multiparty conference (+CSSU: 4)

  Priority: Medium
  Complexity: C1
  Owner: Pekka Pessi <pekka.pessi@nokia.com>

- Long phone numbers. According to 3GPP TS 24.008, the callee address
  can be up to 80 digits long.

  Priority: Medium
  Complexity: C2
  Owner: Rafael Ignacio Zurita <rafael.zurita@profusion.mobi>

- Dial strings. Include CLIR prefixes and 2nd stage dial strings in the
  DialString call property. Add dialstring accessor method to C API.

  Priority: Medium
  Complexity: C4

- Provide feedback of sent DTMF tones. Emit SendingTones signal if modem can
  provide approximate starting and stopping times for DTMF tones. Signal
  argument contains a string of DTMF tones to be sent, or empty string when
  all tones has been sent.

  Priority: Medium
  Complexity: C2
  Owner: Pekka Pessi <pekka.pessi@nokia.com>

- Blacklisting. According to 3GPP TS 22.001 annex E, the TE must provide
  automatic calling repeat call attempt restrictions.

  There should be a method to manually reset blacklisting.

  Priority: Medium
  Complexity: C1


Sim Toolkit
===========

- Support Refresh proactive command.  The specification defines 7 types
  of Refresh types:
	- NAA Initialization
	- NAA File Change Notification
	- NAA Initialization and File Change Notification
	- NAA Initialization and Full File Change Notification
	- UICC Reset
	- NAA Application Reset (2G only)
	- NAA Session Reset (3G only)

  The 'NAA Initialization' type will be ignored by oFono, it is assumed
  this is handled by the modem.

  For 'UICC Reset', 'NAA Application Reset' and 'NAA Session Reset' oFono
  will first check whether there are any calls or ussd operations active.
  If there are, the appropriate response will be sent (e.g. busy on call
  or screen busy terminal response.)  Otherwise a positive response will be
  sent to the driver.  In the case of a 'UICC Reset' the driver / modem
  can interpret this that it is safe to reset the UICC.

  Alternatively, the driver / modem can notify the core of the SIM removal
  / SIM insertion events without using the Refresh proactive command.  It
  is up to the driver / modem to perform a warm reset.  In particular, 3GPP
  31.111 mandates that any change to EFimsi is done by using 'UICC Reset',
  'NAA Application Reset' or 'NAA Session Reset'.  Please see 3GPP 31.111
  Section 6.4.7.1.

  Other types will be handled by oFono flushing the EF cache of the files
  affected (or the entire SIM cache in case of Full File Change Notifications)
  and re-reading the affected files.  Any properties derived from these
  Elementary Files will be updated and signaled using PropertyChanged.

  Priority: High
  Complexity: C8

- Support Send Short Message proactive command.

  Priority: High
  Complexity: C2
  Owner: Andrzej Zaborowski <andrew.zaborowski@intel.com>

- Support Set Up Call proactive command.  If the UICC has indicated that
  the user should be informed, then the SimToolkitAgent will be called
  in order to request user's confirmation of the call setup.  If the user
  has confirmed, or if user's confirmation was not requested, oFono will
  setup the call and optionally inform the user.

  Priority: High
  Complexity: C8


Emergency Calls
===============

- Modem Emergency mode.  Support network registration and online/offline
  mode during the emergency calls and related network activity (e.g.,
  network-initiated location request via supplementary service channel).

  Proposed solution is to introduce a new Emergency boolean property to the
  Modem D-Bus interface and new functions to modem interface:

  - ofono_modem_emergency_mode_inc()
  - ofono_modem_emergency_mode_dec()
  - ofono_modem_emergency_mode_get()
  - ofono_modem_add_emergency_mode_watch()
  - ofono_modem_remove_emergency_mode_watch()

  When emergency mode is requested, modem is set to online (if needed) and
  the watchers are notified. There can be multiple parties requesting
  emergency mode.  When all of them have completed the emergency-related
  operation and called ofono_modem_emergency_mode_dec(), modem is set to
  offline (if needed) and the watchers are again notified.

  Priority: High
  Complexity: C2

- Country / Operator specific emergency numbers.  Figure out how to support
  countries / operators with specific mandated emergency numbers which are
  not part of the standard emergency number list. This needs to be queried
  by the voicecall atom every time a new SIM is inserted.  The list is
  assumed to be managed by the modem.  If no such functionality is available,
  then the 3GPP mandated behavior is used.

  Priority: High
  Complexity: C2

- Network updating the emergency number list. Support the list of emergency
  numbers dynamically updated by the network.

  Priority: High
  Complexity: C2
  Owner: Petteri Tikander <petteri.tikander@ixonos.com>


Miscellaneous
=============

- Bluetooth SAP Client support.  The Telit UC864-G devices support Bluetooth
  SAP client mode.  This requires the use of a modem side-channel to read the
  APDU & CPDU data and send it to the remote phone device over Bluetooth RFCOMM
  channel.

  Complexity: C4
  Priority: Low

- PolicyKit support.  Add support for PolicyKit checking of all oFono D-Bus
  interfaces.

  Complexity: C4
  Priority: Low

- Internet Access Provider database.  Have oFono automatically configure
  GPRS contexts based on an internal database.  Database format to be decided.
  If there are multiple matches in the database, then some user intervention
  might be required.

  Priority: Medium
  Complexity: C8
  Owner: Jukka Saunamäki <jukka.saunamaki@nokia.com>

- Add support for GPS power control atom.  Many modem manufacturers provide
  a GPS unit with their modem hardware.  This unit can be turned on or off
  and frequently takes over one of the tty ports that the modem provides.

  This feature is not discussed in 27.007, thus manufacturer specific commands
  are required.

  Priority: Low
  Complexity: C4
  Owner: Rafael Ignacio Zurita <rafael.zurita@profusion.mobi>

- Add Location Service API for providing basic E911 suport.
  This will be based on the 27.007 defined AT commands using
  XML for transport of positioning request and responses.

  Priority: Medium
  Complexity: C2
  Owner: Sjur Brændeland <sjur.brandeland@stericsson.com>

CDMA Voicecall
==============

- Add support for Mobile Originated and Mobile Terminated Voice Call over
  a CDMA network. This includes management of call state and providing
  appropriate values for the LineIdentification in each case.

  Priority: High
  Complexity: C2
  Owner: Dara Spieker-Doyle <dara.spieker-doyle@nokia.com>

- Add support for Three-Way Calling over a CDMA network. Three-Way Calling
  provides the subscriber with the capability to add a third party to an
  established two-party call, so that all three parties may communicate in a
  three-way call.

  In CDMA mode, the originating subscriber of a current conversation can
  request for a third party to be added to a conversation by sending a Flash
  With Information Message (FWIM) with dialed digits to the network. Upon
  setting up a two-way conversation with the added party, the originating
  subscriber can request to establish a three-way conversation by sending
  another Flash With Information Message. Upon receiving the second Flash With
  Information Message, the MSC reconnects the original party to the
  conversation thus completing the setup of a three-way conversation.

  CDMA Three-Way Calling is described by Figure B-5 in 3GPP2 C.S0005-E Version
  2.0.

  Priority: High
  Complexity: C2

- Add support for Call Waiting over a CDMA network. Call Waiting (CW) provides
  notification of an incoming call to an originating subscriber, while the
  subscriber's call is in the 2-way state. Subsequently, the originating
  subscriber can either answer or ignore the incoming call. If the originating
  subscriber answers the second call, it may alternate between the two calls.

  In CDMA mode, the originating subscriber of a current conversation will
  receive either a Flash With Information Message or an Alert With Information
  Message from the network if there is an additional mobile terminated voice
  call incoming. The originating subscriber can change conversation parties by
  sending a Flash With Information Message to the network and the MSC will
  toggle the speech path between the two conversations.

  CDMA Call Waiting is described by Figure B-6 in 3GPP2 C.S0005-E Version
  2.0.

  Priority: High
  Complexity: C2

- Support sending DTMF tones over CDMA network.

  Priority: High
  Complexity: C2

- Support optional network-based Plus Code Dialing for international calls over
  a CDMA network. An input key, e.g. the "+" key, or a functional equivalent
  can be used to replace the international access prefix when dialing. When
  received, transmitted or stored, an international indicator can be included
  with the address digits although it is the responsibility of the network to
  ignore the international indicator when attached to a national number. This
  is described in Section 2.7.1.3.2.4 of 3GPP2 C.S0005-E v2.0 and Section 1.2
  of 3GPP2 N.S0027 v1.0.

  Priority: High
  Complexity: C2

CDMA SMS
==============

- Support CDMA SMS stack in PDU mode. This includes basic support of
  SMS Point-to-Point Message, SMS Broadcast Message and SMS Acknowledge
  Message as per 3GPP2 C.S0015-B version 2.0.

  Priority: High
  Complexity: C4

- Support sending Wireless Messaging Teleservice (WMT) Submit Message and
  receiving WMT Deliver Messsage as defined 3GPP2 C.S0015-B version 2.0.

  Priority: High
  Complexity: C4

- Support Delivery Acknowledgment. oFono allows requesting of CDMA SMS
  Delivery Acknowledgment via the MessageManager's
  UseDeliveryAcknowledgement property. If enabled, oFono's CDMA SMS stack
  will encode the Reply Option subparameter in the Submit message and
  process incoming SMS Delivery Acknowledgment Message. oFono will notify
  UI either via DBus or history plugin API.

  Priority: Medium
  Complexity: C2

- Support receiving Voice Mail Notification (VMN) Teleservice Deliver
  message. CDMA network uses VMN Teleservice to deliver the number of
  messages stored at the Voice Mail System to the CDMA mobile subscriber.

  Priority: High
  Complexity: C4

- Support sending Wireless Enhanced Messaging Teleservice (WEMT) Submit
  Message and receiving WEMT Deliver Messsage as defined 3GPP2 C.S0015-B
  version 2.0.

  WMT does not support message fragmentation thus can not be used to for
  long message. WEMT is devised to support long message and Enhanced
  Messaging Service (EMS). The WEMT SMS message's CHARi field of the
  subparameter User Data encapsulate GSM-SMS TP-User Data as defined in
  Section 9.2.3.24 of 3GPP TS 23.040.

  Priority: Medium
  Complexity: C4

- Support sending Wireless Application Protocol (WAP) Teleservice Submit
  Message and receiving WAP Deliver Messsage as defined 3GPP2 C.S0015-B
  version 2.0.

  Priority: Medium
  Complexity: C4

- Support Call-Back Number. The Call-Back Number subparameter indicates
  the number to be dialed in reply to a received SMS message.

  In transmit direction, oFono allows setting of Call-Back Number. If the
  Call Back Number property is set, CDMA SMS stack will encode Call-Back
  Number subparameter in the Submit Message.

  In receiving direction, oFono will process the Call-Back Number
  subparameter in the incoming Deliver Message and notify UI of the
  Call-Back Number together with the newly received text message.

  Priority: Medium
  Complexity: C2

- Support immediately displayed message. oFono CDMA SMS stack will
  process the optional Message Display Mode subparameter in the incoming
  SMS message. If Message Display Mode subparameter indicates the
  message display mode is Immediate Display, oFono will send
  ImmediateMessage signal, otherwise oFono will send IncomingMessage
  signal.

  Priority: Medium
  Complexity: C2


CDMA CMAS
==============

- Support Commercial Mobile Alert Service (CMAS) over CDMA systems. CMAS
  over CDMA system is defined in TIA-1149. The CMAS message is carried in
  the CHARi field of the User Data subparameter of CDMA SMS Broadcast
  message.

  Priority: Medium
  Complexity: C4

CDMA NETWORK ACQUISITION
========================

- Support reporting of the received signal strength indicator (RSSI)
  measurement and of the pilot energy ratio (Ec/Io) measurement, for the
  currently acquired CDMA network.

  Priority: Medium
  Complexity: C1
  Owner: Dara Spieker-Doyle <dara.spieker-doyle@nokia.com>

- Support reporting of the received signal strength indicator (RSSI)
  measurement and of the signal to interference-plus-noise ratio (SINR)
  measurement, for the currently acquired 1xEV-DO data network.

  Priority: Medium
  Complexity: C1

- Support reporting of the Enhanced Roaming Indicators (ERI) to indicate the
  current roaming condition of the CDMA mobile device. Each indicator maps to
  a unique display number within the Standard and Non-Standard service ranges,
  as described in Section 8 of 3GPP2 C.R1001-C v1.0.
  These numbers are stored on the device in the (Enhanced) Preferred Roaming
  List (PRL) and it is the responsibility of the modem to broadcast the
  relevant indicator for a currently acquired system. Further details of the
  system acquisition process are described in 3GPP2 C.S0016-B v1.0.

  Priority: Medium
  Complexity: C2

- Support reporting of identifiers of the currently acquired CDMA network,
  including the System Identifier (SID) and the Network Identifier (NID),
  It is the responsibility of the modem to broadcast the relevant identifiers
  for a currently acquired system, and these identifiers are provided by the
  network. This is described in 3GPP2 C.S0005-E v2.0.

  Priority: Medium
  Complexity: C2

- Support International Roaming, including support for reporting the Mobile
  Country Code (MCC) and the Mobile Network Code (MNC) for the currently
  acquired network. International Roaming is provided via enhancements to the
  PRL by encoding the MCC and the (two digit only) MNC in existing SID/NID
  fields, as described in the CDMA Development Group standards Document "IPRL
  Enhancements for International Roaming - CDG Doc #86". It is the
  responsibility of the modem to broadcast the values for the currently
  acquired system.

  Priority: Medium
  Complexity: C2