HandsFree Profile (HFP) 통신연구소 S/W Team 이상제

Table of contents Configuration and Roles 2 Application layer(HFP) 6 Preface 31 Protocol Stack 33 Headset Profile 35 ACL link and SCO link 4

What is Profile? –Describe how implementations of user models are to be accomplished. –Decrease the risk of interoperability problems between different manufacturers' products. 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 (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

Hands Free Profile What is deferent of HFP and HSP Headset Profile Headset Profile

Application layer(HFP)

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 FeatureHFAG 1. Connection ManagementMM

Service Level Connection establishment Application layer The HF notifies the AG about its own supported features and the AG responds with its supported features

Service Level Connection establishment Application layer The HF retrieves the information describing the indicators supported in the AG

Service Level Connection establishment Application layer The HF requests the current status of the indicators in the AG

Service Level Connection establishment Application layer The HF requests enabling Indicator Status update in the AG

Service Level Connection establishment Application layer The HF retrieves the information describing the call hold and multiparty services supported in the AG

 At least the two indicators “service” and “call”. Application layer FeatureHFAG 2. Phone status informationMM Status information Signal Strength IndicationRegistration Status Roaming Status Indication Query Operator Selection Report Extended Audio Gateway Error Results Code Transfer of Call, Call Setup, Held Call Status Battery Level Indication of AG

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 FeatureHFAG 3. Audio Connection handlingMM

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 FeatureHFAG 4. Accept an incoming voice callMM

Application layer FeatureHFAG 4. Accept an incoming voice callMM Answer an incoming call from the HF – in-band ring tone Answer an incoming call from the HF – no in-band ring tone

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 FeatureHFAG 5. Reject an incoming voice callMO

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 FeatureHFAG 6. Terminate a callMM

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 FeatureHFAG 7. Audio Connection transfer during an ongoing callMM AGAG HF AGAG

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 FeatureHFAG 8. Place a call with a phone number supplied by the HFOM

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 FeatureHFAG 9. Place a call using memory dialingOM

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 FeatureHFAG 10. Place a call to the last number dialedOM

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 FeatureHFAG 11. Call waiting notificationOM

Call Waiting Notification Application layer FeatureHFAG 12. Three way callingOO 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.

Third Party Call Placed from the HF Application layer FeatureHFAG 12. Three way callingOO

Calling Line Identification (CLI) Notification –Pre-condition Established Service Level Connection Internal event or user requested: Enable CLI notification Application layer FeatureHFAG 13. Calling Line Identification(CLI)OO

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 FeatureHFAG 14. Echo canceling(EC) and noise reduction(NR)OO

Application layer FeatureHFAG 15. Voice recognition activationOO 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 FeatureHFAG 16. Attach a Phone number to a voice tagOO 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 number Store The Voice Tag and Phone Number

Application layer FeatureHFAG 17. Ability to transmit DTMF codesOM Transmit DTMF Codes –Pre-condition : Established Service Level Connection An ongoing call in the AG exists

Application layer FeatureHFAG 18. Remote audio volume controlOO 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 AG

Application layer FeatureHFAG 19. Respond and HoldOO 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

Application layer FeatureHFAG 19. Respond and HoldOO AT+BTRH? (Read Current Status) AT+BTRH= (Set command) 0 = Put Incoming call on hold 1 = Accept a held incoming call 2 = Reject a held incoming call +BTRH: (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

Application layer FeatureHFAG 20. Subscriber Number InformationOM 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

Application layer FeatureHFAG 21a. Enhanced Call StatusOM 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)

Application layer FeatureHFAG 21b. Enhanced Call ControlsOO 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.