1. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: TG8 PAC Link Layer Specification
Date Submitted: 7 July, 2013
Source: Seong-Soon Joo, Jong-Arm Jun, In-Hwan Lee, Cheol-Sig Pyo
Company: ETRI
Address: 161 Gajeong-dong, Yuseong-gu, Daejeon, KOREA
Voice: , FAX: ,
Re:
Abstract: As a final proposal for the IEEE TG8 standards, the reference model of the PAC enabled networks and the PAC link layer specification are proposed.
Purpose: Response to the IEEE TG8 call for proposal
Notice: This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P
<author>, <company>

2. TG8 PAC Link Layer Specification
<month year>
doc.: IEEE <doc#>
TG8 PAC Link Layer Specification
Seong-Soon Joo*,
Jong-Arm Jun, In-Hwan Lee, Cheol-Sig Pyo
ETRI
<author>, <company>

3. Definitions
PAC enabled X-network: A X-network of the devices which is equipped with the PAC device PAC WPAN: The network in which a device can act as a client or server for the other device by allowing shared access various resources such as configuration or control information, location information, sensing data, advertisement, multi-media contents, social contents, etc. peer network host: A PAC device which defines a mission, configures the peer group, hosts peers, and authenticates peers

4. Abbreviations and Acronyms
PB peer network beacon

5. Concepts and Architecture (I)
peer-to-peer wireless personal area network
The network in which a device can act as a client or server for the other device by allowing shared access various resources such as configuration or control information, location information, sensing data, advertisement, multi-media contents, social contents, etc.
n-m group casting
PAC WPAN 1
HPD PD
PAC WPAN 2
HPD PD

6. Concepts and Architecture (II)
networks with the PAC enabled devices
networks of the PAC enabled devices only
PAC WPAN
networks of the devices equipped with the PAC
PAC enabled X-network (e.g. LTE, Ethernet, WiFi, … )
hybrid networks of the PAC WPAN and the PAC enabled X-networks
hybrid PAC network
PAC enabled device
X-network device
PAC WPAN
PAC enabled X-network
Hybrid PAC Network

7. Concepts and Architecture (III)
possible network configurations with the PAC enabled networks
one PAC WPAN
multiple PAC WPAN
one PAC WPAN & one X-network
one PAC WPAN & multiple X-network
multiple PAC WPAN & one X-network
multiple PAC WPAN & multiple X-network
X-network 1
X-network 1
X-network 1
X-network 2
PAC WPAN 1
PAC WPAN 1
PAC WPAN 2
PAC WPAN 1
PAC WPAN 1
PAC WPAN 1
PAC WPAN 2

8. proxy host of P2P network
Topology
peer network host (proxy host)
define a mission, configure the peer group, host peers, authenticate peers, get a service
peer network guest
authenticate the host, serve to the peer group
peer network relay
relay the frame from the host or the frame from the guest
observer of the peer network
not a member of peer group, listen the peer network
wireless device6
wireless device1
wireless device5
wireless device4
wireless device2
wireless device3
host of P2P network
space A
proxy host of P2P network
guest of P2P network
relay of P2P network
observer of P2P network
space A
P2P network 1
wireless device1
P2P network 3
thing 1
wireless device6
wireless device2
thing 6
thing 2
wireless device5
wireless device3
thing 5
thing 3
wireless device4
P2P network 2
thing 4

9. Reference Model components of PAC entity SAP 3 link sub-layer entities
1 management entity
SAP
2 SAPs for PAC device
2 SAPs for PAC enabled X-network device
Link
Application
PHY
Network
IEEE Medium Access Control sublayer
Application
IEEE Link Control sublayer
IEEE PHY
PHY-SAP
LINK-SAP
EL-SAP
PD Management Entity
IEEE Link Network sublayer
IEEE Link layer
EP-SAP
PAC enabled X-network device
PAC device

10. MPDU Structure (I) link frame type link frame header
pre-network formation, after-network formation
control frame, data frame
link frame header
frame control : version, type, length
peer network identifier : service type, network profile
address
peer network authenticator
link frame information
type, length, value
peer network information element : for synchronization, network formation discovery
time slot length, hosting length, P2P length, handshaking length, start time
link frame payload
link frame tail
frame check sequence
Octets: 2 2
0/1/8
variable
Frame Control
Peer Network Identifier
Destination Address
Source Address
Peer Network Authenticator
Peer Network Information Element
Frame Payload
Frame Check Sequence
Peer Network Addressing fields
Link Frame Header
Link Frame Infromaiton
Link Frame Payload
Link Frame Tail

11. MPDU Structure (II) frame control peer network identifier
frame version (3 bits) :
frame type (3 bits) : peer-discover, peer-network management, peer-network data
frame length (10 bits) : up to 1024
control frame, data frame
peer network identifier
peer network profile identifier (12bits): peer network profile
peer network number (6bits): identical number among peer networks of same service profile
peer device address
two types of address : 64 bit address, 8 bit address assigned in a peer network
peer network authenticator
PD’s 64bit address with pre-define key

12. MPDU Structure (III) peer network information element
pre-network management information
peer discovery
hosting phase configuration
length of hosting phase  number of time-slot (1byte)
sequence of resource allocation  {p, h, g, r, gr} (1 byte)
length of pause, length of host, length of guest, length of relay, length of group  number of time-slot (4bits each)
P2P phase configuration
handshaking phase configuration
peer link connection
after-network management information
peer beacon
peer groupcast
peer relaying
peer link release

13. Multiple Access (I) link resources resolve contention
dependent on the PHY
how many links physically separated and working concurrently
dedicated PHY link for common mode
RF transmitters, spatial transmitters
link resource to be arbitrated
radio channel, spatial channel (3D direction based)
allocate resource in time domain
resolve contention
contention among PDs of single PAC enabled network  scheduling
contention among PDs of multiple PAC enabled networks  interference avoidance
data channel
control channel
single PHY
single PACN
multiple PHY
multiple PACN

14. Multiple Access (II) resource allocation resource allocation scale
in time domain
need a scale for the whole components of the PACN
resource scheduling
synchronized scheduling in a PAC enabled network
contention avoidance
advertise the resource allocation schedule to the neighbor PACNs
resource allocation scale
unit of resource  length of time for transmitting the shortest frame (10 bytes link frame)
length of time-slot  n x resource unit
resource unit
scale of resource
time slot
PD 1 of PACN1
PD 2 of PACN1
time slot
PD 1 of PACN2

15. Multiple Access (III)
configurable steps for supporting the life cycle of the P2P network
configurable resource allocation for the each phase
hosting phase
P2P phase
(a)
EOP
(b)
handshaking phase
(c)
(d)
host
guest
pause
(a)
(b)
group/guest
(c)
relay
hosting phase
P2P phase
group
host/group
handshaking phase

16. Synchronization Procedure
synchronize
clock compensation
compensate the oscillator drift
align the time-slot in a network
set start time of the P2P phase
procedure
transmit peer discovery frame every time-slot for minimum sync. adjust interval
adjust the time-slot triggering point
after starting P2P phase, transmit peer beacon periodically
minimum sync adjust interval
PD 1 of PACN1 PD PD PD PD PD PB PB
PD 2 of PACN1
minimum sync adjust interval
PD 1 of PACN2 PD PD PD PD PB PB
PD 2 of PACN2

17. Discovery Procedure peer discovery frame peer discovery procedure
peer network information
peer network service profile
peer network identifier : service category + seq. number
peer network formation
time slot length
network span configuration : hosting phase, P2P phase, handshaking phase
discovering interval
peer network synchronization
PD wake-up interval
peer discovery procedure
send peer discovery frame every Td
peer network service capable PDs respond (address, capability) and synchronize
host notify the network starting time to each PD

18. Scheduling scheduling select the way of using the resource
P2P connection or handshaking
configuration of the peer network phase
configuring the resource allocation
sequence of the pause, host, guest, group, relay
length of the pause, host, guest, relay
hosting phase
hosting phase
P2P phase
P2P phase
hosting phase
hosting phase
pause
host
guest
relay
pause
host
guest
relay
P2P phase
host
group
guest
pause
relay

19. Interference Avoidance
during peer network formation
listen neighbor peer network
adjust P2P phase configuration for achieving low probability of interfering
a PD served multiple peer network
select the time-slot to avoid contention
hosting phase
P2P phase
PD 1 of PACN1 PD PD PD PB PB PB
hosting phase
P2P phase
PD 1 of PACN2 PD PD PB PD PB PB
PD 2 of PACN1 PI
PD 2 of PACN2 PI