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:[Defining Peer Discovery and Group] Date Submitted: [20 September 2012] Source:[Seung-Hoon Park, Kyungkyu Kim, Chiwoo Lim, HyunseokRyu, Daegyun Kim and Won-ilRoh] Company [Samsung Electronics] Address [416, Maetan-3Dong, Yeongtong-Gu, Suwon-Si, Gyeonggi-Do, 443-742, Korea] Voice:[+82-10-9349-9845], FAX: [+82-31-279-0813], E-Mail:[shannon.park@samsung.com] Re: [.] Abstract:[Suggested definition of peer discovery without peering and group communication] Purpose:[To discuss and define the meaning of peer discovery and group] 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. <Seung-Hoon Park et.al.>, <Samsung Electronics>

2. Defining Peer Discovery and Group September 19, 2012 Samsung <Seung-Hoon Park et.al.>, <Samsung Electronics>

3. 802.15.8 PAC PAR • 5.2 Scope: • This standard defines PHY and MAC mechanism for Wireless Personal Area Networks (WPAN) Peer Aware Communications (PAC) optimized for peer to peer and infrastructureless communications with fully distributed coordination. PAC features include: discovery for peer information without association, discovery signaling rate, typically 100 kbps, the number of devices in the discovery, scalable data transmission rates, typically 10 Mbps, group communications with simultaneous membership in multiple groups, typically up to 10, relative positioning, multihop relay, security, and operational in selected globally available unlicensed/licensed bands below 11 GHz capable of supporting these requirements. <Seung-Hoon Park et.al.>, <Samsung Electronics>

4. Peer Discovery • Definition • Discovery of peers in proximity • Discovery of peers through peer identity information sent from PDs in proximity <Seung-Hoon Park et.al.>, <Samsung Electronics>

5. Discovery(Conventional) AP1 STA AP2 AP1 STA AP2 Discovery Discovery Probe Request w/ Blank SSID Probe Request w/ Blank SSID Beacon Beacon Probe Response Probe Response Passive Scan Active Scan <Seung-Hoon Park et.al.>, <Samsung Electronics> 802.11

6. Discovery & Association(Conventional) AP1 STA AP2 AP1 STA AP2 Discovery Discovery Probe Request w/ Blank SSID Probe Request w/ Blank SSID Beacon Beacon Probe Response Probe Response Auth. Request Auth. Request Auth. Response Auth. Response Association Association Assoc. Request Assoc. Request Assoc. Response Assoc. Response Passive Scan Active Scan <Seung-Hoon Park et.al.>, <Samsung Electronics> 802.11

7. Discovery & Association(Conventional) Coordinator1 Device Coordinator2 Discovery Beacon Beacon Assoc. Request ACK Association Data Request ACK Assoc. Response ACK 802.15.4 <Seung-Hoon Park et.al.>, <Samsung Electronics>

8. Device & Service Discovery(Conventional) • Device discovery • Discovery of devices through scanning (beacon or probe response) • Service discovery • High layer protocol (UPnP, bonjour) <Seung-Hoon Park et.al.>, <Samsung Electronics>

9. Network Discovery • 802.11u • Discovery of suitable networks (pre-association) through the advertisement of access network information (network type, roaming, venue) <Seung-Hoon Park et.al.>, <Samsung Electronics>

10. Peer Discovery @ PAC • Suggested definition • Discovery of peers without peering through peer identity information sent from PDs in proximity <Seung-Hoon Park et.al.>, <Samsung Electronics>

11. Comparison of two ways for Peer Discovery PD1 PD2 PD3 Beacon Beacon Discovery of device identifications such as device address Device Discovery Beacon Beacon Beacon Beacon Peering Request Peering Request Peering Response Peering Response Peering Request Peering Peering Response Discovery of peer identities Peer Discovery Higher layer peer discovery protocol * Terminologies are temporally used for explanation <Seung-Hoon Park et.al.>, <Samsung Electronics> Peer discovery with peering (post-peering)

12. Comparison of two ways for Peer Discovery PD1 PD2 PD3 Beacon Beacon Discovery of device identifications such as device address Device Discovery Beacon Beacon Beacon Beacon Peer Discovery Request Peer Discovery Request Peering Request Peering Request Peer Discovery Response Peer Discovery Response Peering Response Peering Response Peering Request Peering Peering Response Discovery of peer identities Peer Discovery Peer Discovery Request Peer Discovery Response * Terminologies are temporally used for explanation <Seung-Hoon Park et.al.>, <Samsung Electronics> Peer discovery with peering (post-peering)

13. Comparison of two ways for Peer Discovery PD1 PD2 PD3 Discovery of peer identities Beacon Beacon Peer Discovery Beacon Beacon Beacon Beacon PD1 identifies peer from peer identity information from PD2 PD1 sends Peering Request with ID which PD2 can understand Peering Request Peering Peering Response PD1 and PD2 can obtain the device identification (e.g. device address) during peering, if required. * Terminologies are temporally used for explanation Peer discovery without peering (pre-peering) <Seung-Hoon Park et.al.>, <Samsung Electronics>

14. Comparison of two ways for Peer Discovery PD1 PD2 PD3 Beacon Beacon Peer Discovery Beacon Beacon Beacon Beacon Peering Request Peering Peering Response Conventional higher layer service discovery protocol can be operated based on device address (e.g. MAC address, IP address) Data/Control ACK Data/Control ACK * Terminologies are temporally used for explanation <Seung-Hoon Park et.al.>, <Samsung Electronics> Peer discovery without peering (pre-peering)

15. 802.15.8 PAC PAR • 5.2 Scope: • This standard defines PHY and MAC mechanism for Wireless Personal Area Networks (WPAN) Peer Aware Communications (PAC) optimized for peer to peer and infrastructureless communications with fully distributed coordination. PAC features include: discovery for peer information without association, discovery signaling rate, typically 100 kbps, the number of devices in the discovery, scalable data transmission rates, typically 10 Mbps, group communications with simultaneous membership in multiple groups, typically up to 10, relative positioning, multihop relay, security, and operational in selected globally available unlicensed/licensed bands below 11 GHz capable of supporting these requirements. <Seung-Hoon Park et.al.>, <Samsung Electronics>

16. Group • Group at higher layer • Related to human recognition • I am a member of • Facebook • Starbucks • Wall-mart • IEEE • And there are others who are members of group as same as mine. <Seung-Hoon Park et.al.>, <Samsung Electronics>

17. Group • Group at MAC layer • Related to machine recognition • Multicast group? • Relaying group? • Group at MAC layer is not always identical to Group at higher layer • I have two friends and three company colleagues. • They are in the same multicast group if I send the same text to them at a chatting window. • So it is recognized as members in single group at MAC. <Seung-Hoon Park et.al.>, <Samsung Electronics>

18. Suggested Definition of Group • Group at MAC layer • Group identification is indicated by higher layer • Group member at MAC layer • A PD which is identified by matching with Group identification from higher layer • It can be identified at peer discovery or peering. <Seung-Hoon Park et.al.>, <Samsung Electronics>

19. Locality of Group Notion PD6 PD2 PD1’s group members : PD4 PD3 PD5 PD9 PD1 PD5 PD4 PD7 PD7’s group members : PD4 PD5 PD8 PD3 PD6 PD9 *2-hop limitation <Seung-Hoon Park et.al.>, <Samsung Electronics> • Locality of 1-hop transmission • Due to a limit on transmission range • Locality of multi-hop transmission • Due to a limit of hop-count • Locality of group notion per each PD