Advertising Physical Channel PDU

참고자료: https://www.bluetooth.com/specifications/specs/core-specification-5-3/

* 블루투스 전체 LE 패킷 포맷은 "Bluetooth LE Packet Format" 참고

 

Advertising Physical Channel PDU

- Periodic physical channel에서도 사용된다

- Advertising PDU를 송신하는 state: Advertising state

- Advertising PDU를 수신하는 state: Scanning state 또는 Initiating state

LE Advertising Physical Channel PDU

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1. Header

Header - LE Advertising physical channel PDU

 

1-1. PDU Type

PDU Type - LE Advertising physical channel PDU Header
PDU Type	PDU Name	Physical Channel	LE Coded	LE 1M	LE 2M
0b0000	ADV_IND	Primary Advertising		●
0b0001	ADV_DIRECT_IND	Primary Advertising		●
0b0010	ADV_NONCONN_IND	Primary Advertising		●
0b0011	SCAN_REQ	Primary Advertising		●
	AUX_SCAN_REQ	Secondary Advertising	●	●	●
0b0100	SCAN_RSP	Primary Advertising		●
0b0101	CONNECT_IND	Primary Advertising		●
	AUX_CONNECT_REQ	Secondary Advertising	●	●	●
0b0110	ADV_SCAN_IND	Primary Advertising		●
0b0111	ADV_EXT_IND	Primary Advertising	●	●
	AUX_ADV_IND	Secondary Advertising	●	●	●
	AUX_SCAN_RSP	Secondary Advertising	●	●	●
	AUX_SYNC_IND	Periodic	●	●	●
	AUX_CHAIN_IND	Secondary Advertising	●	●	●
		Periodic	●	●	●
0b1000	AUX_CONNECT_RSP	Secondary Advertising	●	●	●
나머지 모든 값	RFU

 

1-2. ChSel / TxAdd / RxAdd

- PDU에 따라 값의 의미가 다르다 (아래 표 참고)

Advertising PDU에서 ChSel / TxAdd / RxAdd
Advertising PDU	PDU	ChSel	TxAdd	RxAdd
	ADV_IND	LE Channel Selection Algorithm #2 1: advertiser 지원	advertiser address 0: public 1: random	RFU
	ADV_DIRECT_IND	LE Channel Selection Algorithm #2 1: advertiser 지원	advertiser address 0: public 1: random	target address 0: public 1: random
	ADV_NONCONN_IND	RFU	advertiser address 0: public 1: random	RFU
	ADV_SCAN_IND	RFU	advertiser address 0: public 1: random	RFU
	ADV_EXT_IND	RFU	RFU	RFU
	AUX_ADV_IND	RFU	RFU	RFU
	AUX_SYNC_IND	RFU	RFU	RFU
	AUX_CHAIN_IND	RFU	RFU	RFU
Scanning PDU	SCAN_REQ	RFU	scanner address 0: public 1: random	advertiser address 0: public 1: random
	SCAN_RSP	RFU	advertiser address 0: public 1: random	RFU
	AUX_SCAN_REQ	RFU	scanner address 0: public 1: random	advertiser address 0: public 1: random
	AUX_SCAN_RSP	RFU	RFU	RFU
Initiating PDU	CONNECT_IND	LE Channel Selection Algorithm #2 0: initiator 미지원 1: initiator 지원, advertiser 지원 0 또는 1: initiator 지원, advertiser 미지원	initiator address 0: public 1: random	advertiser address 0: public 1: random
	AUX_CONNECT_REQ	RFU	initiator address 0: public 1: random	advertiser address 0: public 1: random
	AUX_CONNECT_RSP	RFU	RFU	RFU

 

1-3. Length

- Payload의 octet 길이 (1~255 octet)

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2. Payload

 

2-1. Advertising PDU Payload

- 자세한 내용은 "Advertising PDU Payload"참고

- ADV_IND PDU 

- ADV_DIRECT_IND PDU 

- ADV_NONCONN_IND PDU 

- ADV_SCAN_IND PDU 

- ADV_EXT_IND PDU 

- AUX_ADV_IND PDU 

- AUX_SYNC_IND PDU 

- AUX_CHAIN_IND PDU 

 

2-2. Scanning PDU Payload

- 자세한 내용은 "Scanning PDU Payload"참고

- SCAN_REQ PDU (scan request PDU)
- SCAN_RSP PDU (scan response PDU)
- AUX_SCAN_REQ PDU (scan request PDU)
- AUX_SCAN_RSP PDU  (scan response PDU)

 

2-3. Initiating PDU Payload

- 자세한 내용은 "Initiating PDU Payload"참고

- CONNECT_IND PDU (Initiating state 디바이스 -> Advertising state 디바이스)
- AUX_CONNECT_REQ PDU (Initiating state 디바이스 -> Advertising state 디바이스)
- AUX_CONNECT_RSP PDU (Advertising state 디바이스 -> Initiating state 디바이스)