Bluetooth ???

1
Bluetooth ???

• ??????????
• ????????

??? ???
2
??????

• 1.?????
• ?????????
• 2.????(Device Addressing)
• 3.????(Physical channel)
• 4.??(Frequency Hopping)
• 5.????(Master and Slave)
• 6.Piconet and Scatternet
• 7.??????(SCO and ACL)

3
????or?????!

• ANS ????
• (Digital Modulation)

4
Why?

• 1.??????
• - ????0?1
• 2.??????
• - Data?Voice?Video
• 3.??????
• - Encryption

5
Device Addressing

• 1.BD_ADDR
• NAP(not important)UAP(hopping)LAP(unique)
• 2.AM_ADDR
• Active Member Address MAX8
• 3.PM_ADDR
• Parked Member Address MAX256
• 4.AR_ADDR
• required Parked Mode to Active Mode

6
????(Physical channel)

• 1Mbit/sec

7
????(????)
8
????(Frequency Hopping)
9
Master?Slave????

• ??Master?Slave????time block
• ?Master?????

10
Piconet Formation

• Page - scan protocol
• to establish links with nodes in proximity

11
Scatternet Formation
12
Physical Link Types

• Synchronous Connection Oriented (SCO) Link
• Slot reservation at fixed intervals
• Asynchronous Connection-less (ACL) Link
• Polling access method

13
??????(Security)

• ?????????
• ?????????

14
?????
15
???????

• 1.Initialization key
• 2.Link key
• 3.Mutual authentication
• 4.Encryption key
• 5.Key stream
• 6.Encryption of data

16
Initialization key
IN_RAND
IN_RAND
IN_RAND
PIN
PIN
E22
E22
L
L
Kinit
Kinit
17
Link key (1)
Kinit
Kinit
K
KA Klink
KA Klink
18
Link key (2)
LK_RANDA
LK_RANDB
ADDRA
ADDRB
LK_RANDA
LK_RANDB
E21
E21
LKA
LKB
KAB Klink
KAB Klink
LKA
LKB
LK_RANDB
LK_RANDB
E21
E21
ADDRB
ADDRA
19
Mutual authentication
ADDRB
AU_RAND
ADDRB
ADDRB
E1
E1
Klink
Klink
AU_RAND
AU_RAND
SRES
SRES
ACO
ACO
SRES
20
Encryption key
EN_RAND
EN_RAND
EN_RAND
E3
E3
Klink
Klink
ACO
ACO
KC
KC
21
Key stream
ADDRA
ADDRA
E0
E0
clockMASTER
clockMASTER
KC
KC
KCIPHER
KCIPHER
22
Encryption of data
KCIPHER
KCIPHER
DATA
DATA
KCIPHER
KCIPHER
DATA
DATA
23

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