Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

1. Project: IEEE P802.15 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: +82-42-860-6333, FAX: +82-42-860-4197, E-Mail: ssjoo@etri.re.kr Re: Abstract: As a final proposal for the IEEE 802.15 TG8 standards, the reference model of the PAC enabled networks and the PAC link layer specification are proposed. Purpose: Response to the IEEE802.15 TG8 call for proposal Notice: This document has been prepared to assist the IEEE P802.15. 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 P802.15.

2. TG8 PAC Link Layer Specification Seong-Soon Joo*, Jong-Arm Jun, In-Hwan Lee, Cheol-Sig Pyo ETRI

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. PAC WPAN 1 PAC WPAN 2 HPD HPD PD PD PD • n-m group casting

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 2 PAC WPAN 1 PAC WPAN 2 PAC WPAN 1 PAC WPAN 1 PAC WPAN 1

8. Topology hostof P2P network space A • 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 device1 guest of P2P network proxy hostof P2P network wireless device6 wireless device2 space A P2P network 1 wireless device1 P2P network 3 thing 1 relay of P2P network observer of P2P network wireless device6 wireless device2 wireless device5 thing 6 thing 2 wireless device3 guest of P2P network wireless device5 wireless device3 thing 5 thing 3 wireless device4 wireless device4 P2P network 2 thing 4

9. Reference Model • components of PAC • entity • 3 link sub-layer entities • 1 management entity • SAP • 2 SAPs for PAC device • 2 SAPs for PAC enabled X-network device Application Application Network LINK-SAP Link EL-SAP IEEE 802.15.8 Link Control sublayer IEEE 802.15.8 Medium Access Control sublayer PHY-SAP PHY IEEE 802.15.8 PHY PD Management Entity IEEE 802.15.8 Link Network sublayer IEEE 802.15.8 Link layer EP-SAP PAC enabled X-network device PAC device

10. MPDU Structure (I) • link frame type • 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

11. MPDU Structure (II) • frame control • 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 • 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 PACN single PHY multiple PACN multiple PHY

14. Multiple Access (II) • resource allocation • 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 pause host guest relay pause host guest relay (a) P2P phase hosting phase hosting phase P2P phase P2P phase hosting phase (a) host pause group guest relay (b) hosting phase P2P phase P2P phase P2P phase EOP P2P phase (b) host/group pause guest handshaking phase handshaking phase (c) handshaking phase host pause group/guest pause host pause group/guest pause handshaking phase P2P phase P2P phase EOP (c) (d)

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 PB PB PD PD PD PD PD 2 of PACN2

17. Discovery Procedure • peer discovery frame • 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 pause group guest relay

19. Interference Avoidance • 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 PB PB PD PD PB PD PD 2 of PACN1 PI PD 2 of PACN2 PI