handsfree profile (hfp) 2009. 07. 21 통신연구소 s/w team 이상제
TRANSCRIPT
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HandsFree Profile (HFP)
2009. 07. 21
통신연구소 S/W Team 이상제
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Table of contents
Configuration and Roles2
Application layer(HFP)6
Preface31
Protocol Stack33
Headset Profile35
ACL link and SCO link4
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• What is Profile?– Describe how implementations of user models are to be
accomplished.– Decrease the risk of interoperability problems between
different manufacturers' products.
Preface
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Preface
• What is HFP?– Defines the minimum
set of functions such that a Mobile Phone can be used in conjunction with a Hands-Free device
– Remote control of the Mobile Phone by the Hands-Free device
– Voice connections between the Mobile Phone and the Hands-Free device.
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Configuration and Roles
• Audio Gateway (AG)– Gateway of the audio, both for input and output.
• Hands-Free unit (HF)– Acting as the Audio Gateway’s remote audio input and
output mechanism. It also provides some remote control means.
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Protocol Stack
OSI Physical layer and Data link layer Bluetooth protocols.
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Protocol Stack
RFCOMM is the Bluetooth serial port emulation entity
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Protocol Stack
Bluetooth Service Discovery Protocol
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Protocol Stack
Responsible for Hands-Free unit specific control signaling; this signaling is AT command based.
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Protocol Stack
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• SCO (Synchronous Connection Oriented)– Point-to-point link between the master and a specific
slave– Typically supports time-bounded information like voice
• ACL (Asynchronous Connectionless)– point-to-multipoint link between the master and all the
slaves participating on the piconet– Both asynchronous and isochronous services are
supported
SCO link and ACL link
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Hands Free Profile
• What is deferent of HFP and HSP
Headset Profile
Headset Profile
<HSP Application layer>
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Application layer(HFP)
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Application layer(HFP)
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• Service Level Connection establishment– Pre-condition: RFCOMM connection establishment – Service Level Connection Initialization – Link Loss Recovery
• Service Level Connection release– Pre-condition: Established Service Level Connection
Application layer
Feature HF AG
1. Connection Management M M
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Service Level Connection establishment
Application layer
The HF notifies the AG about its own supported
features and
the AG responds with its supported features
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Service Level Connection establishment
Application layer
The HF retrieves the information
describing the indicators supported in the AG
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Service Level Connection establishment
Application layer
The HF requests the current status of
the indicators in the AG
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Service Level Connection establishment
Application layer
The HF requests enabling Indicator Status
update in the AG
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Service Level Connection establishment
Application layer
The HF retrieves the information
describing the call hold and
multiparty services supported in the AG
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At least the two indicators “service” and “call”.
Application layer
Feature HF AG
2. Phone status information M M
Statusinformation
Signal Strength IndicationRegistration Status
Roaming Status Indication
Query Operator Selection
Report ExtendedAudio Gateway Error Results Code
Transfer of Call, Call Setup ,Held Call Status
Battery Level Indication of AG
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• Audio Connection set up– Pre-condition: Established Service Level Connection– HF or the AG initiate the establishment of an Audio
Connection.– Always Synchronous Connection
• Audio Connection release– Pre-condition: Established Audio Connection – Disconnection of its corresponding Synchronous
Connection. – When the audio connection is released, the audio path
shall be routed to the AG.
Application layer
Feature HF AG
3. Audio Connection handling M M
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• Answer an incoming call– Answer Incoming Call from the HF – In-Band Ringing
• Pre-condition : Established Service Level Connection
– Answer Incoming Call from the HF – No In-Band Ringing • Pre-condition : Established Service Level Connection
(or optionally an Audio Connection)
– Answer Incoming Call from the AG • Pre-condition : AG is alerting the HF
– Change the In-Band Ring Tone Setting • Pre-condition : Established Service Level Connection
Application layer
Feature HF AG
4. Accept an incoming voice call M M
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Application layer
Feature HF AG
4. Accept an incoming voice call M M
Answer an incoming call from the HF – in-band ring tone
Answer an incoming call from the HF – no in-band ring tone
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• Reject an incoming call– Reject an Incoming Call from the HF
• Pre-condition : AG is alerting the HF
– Rejection/Interruption of an Incoming Call in the AG • Pre-condition : AG is alerting the HF
Application layer
Feature HF AG
5. Reject an incoming voice call M O
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• Terminate a Call Process from the HF– Pre-condition
• Established Service Level Connection• Ongoing call process
• Terminate a Call Process from the AG – Pre-condition
• Established Service Level Connection• Ongoing call process
Application layer
Feature HF AG
6. Terminate a call M M
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• Audio Connection transfer towards the HF– Pre-condition
• Established Service Level Connection• The audio paths of the ongoing call are available at the AG
• Audio Connection transfer towards the AG– Pre-condition
• Established Service Level Connection• Ongoing call process with the audio paths routed towards
the HF
Application layer
Feature HF AG
7. Audio Connection transfer during an ongoing call
M M
AG
HF
HFAG
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• Place a call with a phone number supplied by the HF– Pre-condition
• Established Service Level Connection(or optionally an Audio Connection)
• The audio paths of the ongoing call are available at the HF
- Initiate outgoing voice calls by providing the destination phone number to the AG.
Application layer
Feature HF AG
8. Place a call with a phone number supplied by the HF
O M
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• Memory Dialing from the HF – Pre-condition : Established Service Level Connection
(or optionally an Audio Connection)– Initiate outgoing voice calls using the memory dialing
feature of the AG
Application layer
Feature HF AG
9. Place a call using memory dialing O M
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• Last Number Re-Dial from the HF – Pre-condition : Established Service Level Connection
(or optionally an Audio Connection)– initiate outgoing voice calls by recalling the last number
dialed by the AG.
Application layer
Feature HF AG
10. Place a call to the last number dialed O M
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• Call Waiting Notification Activation – Pre-condition
• Established Service Level Connection• Internal event or user requested: Enable Call Waiting
notification
– The HF requests enabling Call Waiting notification indication
Application layer
Feature HF AG
11. Call waiting notification O M
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• Call Waiting Notification
Application layer
Feature HF AG
12. Three way calling O O
0 = Releases all held calls or sets User Determined User Busy (UDUB) for a waiting call.1 = Releases all active calls (if any exist) and accepts the other (held or waiting) call.2 = Places all active calls (if any exist) on hold and accepts the other (held or waiting) call.3 = Adds a held call to the conversation.4 = Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer). Support for this value and its associated functionality is optional for the HF.
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• Third Party Call Placed from the HF
Application layer
Feature HF AG
12. Three way calling O O
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• Calling Line Identification (CLI) Notification – Pre-condition
• Established Service Level Connection• Internal event or user requested: Enable CLI notification
Application layer
Feature HF AG
13. Calling Line Identification(CLI) O O
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• The HF Requests Turning Off the AG’s EC and NR – Pre-condition : Established Service Level Connection
• If the HF has embedded EC and/or NR functions enabled, it shall perform this procedure before any Audio Connection between the HF and the AG is established.
Application layer
Feature HF AG
14. Echo canceling(EC) and noise reduction(NR)
O O
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Application layer
Feature HF AG
15. Voice recognition activation O O
• Voice Recognition Activation– Pre-condition
• Established Service Level Connection(or optionally an Audio Connection)
– Voice Recognition Activation – HF Initiated – Voice Recognition Activation – AG Initiated
• Voice Recognition Deactivation – Pre-condition
• Established Service Level Connection• Voice recognition is enabled
– Voice recognition deactivation from the HF– Voice recognition deactivation from the AG
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Application layer
Feature HF AG
16. Attach a Phone number to a voice tag O O
• Attach a Phone Number to a Voice Tag – read numbers from the AG for the purpose of creating a
unique voice tag and storing the number and its linked voice tag in the HF unit’s memory.
User Insert Phone
numberStore The Voice Tag and Phone
Number
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Application layer
Feature HF AG
17. Ability to transmit DTMF codes O M
• Transmit DTMF Codes – Pre-condition :
• Established Service Level Connection• An ongoing call in the AG exists
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Application layer
Feature HF AG
18. Remote audio volume control O O
• Audio Volume Control – Enables the user to modify the speaker volume and
microphone gain of the HF from the AG• On a scale from 0 to 15• The values are absolute values• Relate to a particular volume level controlled by the HF
• Volume Level Synchronization – This procedure allows the HF to inform the AG of the
current gain settings corresponding to the HF’s speaker volume and microphone gain.
AG HF
HF AG
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Application layer
Feature HF AG
19. Respond and Hold O O
• Query Response and Hold Status• Put an Incoming Call on Hold from HF • Put an Incoming Call on Hold from AG • Accept a Held Incoming Call from HF • Accept a Held Incoming Call from AG • Reject a Held Incoming Call from HF • Reject a Held Incoming Call from AG • Held Incoming Call Terminated by Caller
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Application layer
Feature HF AG
19. Respond and Hold O O
AT+BTRH? (Read Current Status) AT+BTRH=<n> (Set command) 0 = Put Incoming call on hold 1 = Accept a held incoming call 2 = Reject a held incoming call
+BTRH: <n> (Response for AT+BTRH) 0 = Incoming call is put on hold in the AG 1 = Held incoming call is accepted in the AG 2 = Held incoming call is rejected in the AG
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Application layer
Feature HF AG
20. Subscriber Number Information O M
• HF to query the AG subscriber number– Pre-condition: Established Service Level Connection– AG response to the query of Empty, One or multiple
subscriber number
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Application layer
Feature HF AG
21a. Enhanced Call Status O M
• Query List of Current Calls in AG – Pre-condition: Established Service Level Connection
• Indication of Status for Held Calls – Pre-condition
• Established Service Level Connection• The HF shall have enabled the Call Status Indicators
function in the AG
– Values for the callheld indicator• 0= No calls held• 1= Call is placed on hold or active/held calls swapped
(The AG has both and active AND a held call) • 2= Call on hold, no active call (terminate active call only)
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Application layer
Feature HF AG
21b. Enhanced Call Controls O O
• Release Specified Call Index – Pre-condition
• Established Service Level Connection• Existing call
• Private Consultation Mode – Pre-condition
• Established Service Level Connection• Existing multiparty call
– Place all calls on hold EXCEPT the call indicated.