Transcript HF - bluelimn
HandsFree Profile (HFP)
2009. 07. 21 통신연구소 S/W Team 이상제
Table of contents Preface 2 Configuration and Roles Protocol Stack 4 ACL link and SCO link Headset Profile 6 Application layer(HFP)
Preface • What is Profile?
– Describe how implementations accomplished.
of user models are to be – Decrease the risk of interoperability problems different manufacturers' products.
between
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.
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.
Protocol Stack OSI Physical layer and Data link layer Bluetooth protocols.
Protocol Stack RFCOMM is the Bluetooth serial port emulation entity
Protocol Stack Bluetooth Service Discovery Protocol
Protocol Stack Responsible for Hands Free unit specific control signaling; this signaling is AT command based.
Protocol Stack
SCO link and ACL link • 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
Headset Profile • What is deferent of HFP and HSP Headset Profile
Hands Free Profile
Application layer(HFP)
Application layer(HFP)
Application layer Feature 1. Connection Management HF M • 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 AG M
Application layer Service Level Connection establishment The HF notifies the AG about its own supported features and the AG responds with its supported features
Application layer Service Level Connection establishment The HF retrieves the information describing the indicators supported in the AG
Application layer Service Level Connection establishment The HF requests the current status of the indicators in the AG
Application layer Service Level Connection establishment The HF requests enabling Indicator Status update in the AG
Application layer Service Level Connection establishment The HF retrieves the information describing the call hold and multiparty services supported in the AG
Application layer Feature 2. Phone status information Registration Status HF M Signal Strength Indication AG M Roaming Status Indication Report Extended Audio Gateway Error Results Code Status information Battery Level Indication of AG Transfer of Call, Call Setup , Held Call Status Query Operator Selection At least the two indicators “service” and “call”.
Application layer Feature 3. Audio Connection handling HF M • Audio Connection set up – Pre-condition: Established Service Level Connection – HF or the AG initiate the establishment of an Audio Connection.
– Always Synchronous Connection AG M • 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 4. Accept an incoming voice call HF M • Answer an incoming call – Answer Incoming Call from the HF – In-Band Ringing • Pre-condition : Established Service Level Connection AG M – 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 4. Accept an incoming voice call HF M AG M Answer an incoming call from the HF – in-band ring tone Answer an incoming call from the HF – no in-band ring tone
Application layer Feature 5. Reject an incoming voice call • Reject an incoming call – Reject an Incoming Call from the HF • Pre-condition : AG is alerting the HF HF M – Rejection/Interruption of an Incoming Call in the AG • Pre-condition : AG is alerting the HF AG O
Application layer Feature 6. Terminate a call • 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 HF M AG M
Application layer Feature 7. Audio Connection transfer during an ongoing call HF M AG M • Audio Connection transfer towards the HF – Pre-condition • Established Service Level Connection • The audio paths of the ongoing call are available at the AG AG HF • Audio Connection transfer towards the AG – Pre-condition • Established Service Level Connection • Ongoing call process with the audio paths routed towards the HF HF AG
Application layer Feature 8. Place a call with a phone number supplied by the HF HF O AG M • 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 9. Place a call using memory dialing HF O AG M • Memory Dialing from the HF – Pre-condition : Established Service Level Connection (or optionally an Audio Connection) – Initiate outgoing voice calls using the memory dialing of the AG feature
Application layer Feature 10. Place a call to the last number dialed HF O AG M • 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 11. Call waiting notification HF O AG M • 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 12. Three way calling • Call Waiting Notification HF O AG 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) the other (held or waiting) call.
and accepts 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.
Application layer Feature 12. Three way calling • Third Party Call Placed from the HF HF O AG O
Application layer Feature 13. Calling Line Identification(CLI) HF O • Calling Line Identification (CLI) Notification – Pre-condition • Established Service Level Connection • Internal event or user requested: Enable CLI notification AG O
Application layer Feature 14. Echo canceling(EC) and noise reduction(NR) HF O AG O • 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 15. Voice recognition activation HF O AG 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
Application layer Feature 16. Attach a Phone number to a voice tag HF O AG 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 . Store The Voice Tag and Phone Number User Insert Phone number
Application layer Feature 17. Ability to transmit DTMF codes • Transmit DTMF Codes – Pre-condition : • Established Service Level Connection • An ongoing call in the AG exists HF O AG M
Application layer Feature 18. Remote audio volume control HF 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 AG • Relate to a particular volume level controlled by the HF AG O 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. HF AG
Application layer Feature 19. Respond and Hold • 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 HF O AG O
Application layer Feature 19. Respond and Hold HF O AG O AT+BTRH? (Read Current Status) AT+BTRH=
Application layer Feature 20. Subscriber Number Information HF O • 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 AG M
Application layer Feature 21a. Enhanced Call Status HF O • Query List of Current Calls in AG – Pre-condition: Established Service Level Connection AG M • 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)
Application layer Feature 21b. Enhanced Call Controls • Release Specified Call Index – Pre-condition • Established Service Level Connection • Existing call HF O • Private Consultation Mode – Pre-condition • Established Service Level Connection • Existing multiparty call – Place all calls on hold EXCEPT the call indicated. AG O