1. doc.: IEEE 802.11-14/0374r0 Submission March 2014 Ping FANG, HuaweiSlide 1 Two options for UPnP Printer Discovery Date: 2014-03-03 Authors:

2. doc.: IEEE 802.11-14/0374r0 Submission March 2014 Ping FANG, HuaweiSlide 2 Abstract According to LA meeting discussion, we would like to know exactly how UPnP services can be discovered in 11aq. After further study, two possible approaches, transparent mode and opaque mode, for UPnP services discovery in 11aq are described.

3. doc.: IEEE 802.11-14/0374r0 Submission March 2014 Ping FANG, HuaweiSlide 3 Background In 13/501r0, a architecture with service registration and service discovery is registered. Per the meeting discussion, the registration can be done in MAC layer or upper layer after association. In 13/796r0, the procedure on how a STA discovers necessary service information before association is described with a high level 2-step service discovery procedure proposed. In 13/796r1, more details on service indication are further discussed. In 13/893r0, different service hash values proposed to be carried in service discovery request and response with public action frame for privacy and security. In 13/1403r0, Service indication from AP, network discovery and detailed service information query are described. In 14/0067r0, describes how a UPnP Printer can be discovered in11aq.

4. doc.: IEEE 802.11-14/0374r0 Submission UPnP Device Architecture March 2014 Ping FANG, HuaweiSlide 4 Devices Controllers NOTIFY messages (presence announcements) M-SEARCH messages (device/service search) GET device & service description XML UPnP Actions SOAP SSDP Event subscriptions Event notifications Discovery Description Control Events GENA Service Discovery: Simple Service Discovery Protocol (SSDP)

5. doc.: IEEE 802.11-14/0374r0 Submission Detailed Query in SSDP Service Query syntaxDescription ssdp:allSearches for all UPnP devices and services upnp:rootdeviceSearches for all UPnP root devices uuid:device-uuidSearches for a particular device urn:schemas-upnp-org:device:deviceType:verSearches for devices of the given type urn:domain-name:device:deviceType:verSearches for devices with a vendor-specific type urn:schemas-upnp-org:service:serviceType:verSearches for devices containing a service of the given type urn:domain-name:service:serviceType:verSearches for devices containing a vendor-specific service March 2014 Ping FANG, HuaweiSlide 5 UPnP Printer: urn:schemas-upnp-org:service:PrintBasic:1

6. doc.: IEEE 802.11-14/0374r0 Submission Transparent mode for PrintBasic Service Discovery March 2014 Ping FANG, HuaweiSlide 6 STA/CPAP Service / Network or associated devices GAS Req [IP(UDP(UPnP( M-SEARCH: urn:schemas-upnp- org:service:PrintBasic:1)))] UPnP(GET: XML for service description) UPnP(XML Service Description) GAS Resp [IP(UDP(UPnP: URL to service description))] UPnP(NOTIFY with SSDP:alive) GAS Req [IP(UDP(UPnP: GET: XML for service description))] GAS Res[IP(UDP( UPnP:XML for service description))] UPnP(M-SEARCH: urn:schemas- upnp-org:service:PrintBasic:1) UPnP(URL to service description) Broadcast [IP(UDP(UPnP(NOTIFY with SSDP:alive)))] service query with higher layer syntax For post- Association Proxy Encapsulation Decapsulation Encapsulation Decapsulation Encapsulation

7. doc.: IEEE 802.11-14/0374r0 Submission Transparent Mode for PAD STA need to generate UPnP service query before IP link setup STA need to be configured with a temp IP address STA transmit service discovery with UPnP syntax in MAC message Proxy encapsulates message from PAD STAs Proxy decapsulates message from service provider Proxy needs to maintain a table for STA MAC & temp IP map March 2014 Ping FANG, HuaweiSlide 7

8. doc.: IEEE 802.11-14/0374r0 Submission Opaque mode for UPnP PrintBasic Service Discovery March 2014 Ping FANG, HuaweiSlide 8 STA/CPAP Service / Network or associated devices UPnP (GET: XML for service description) UPnP (XML Service Description) GAS Resp [UPnP: URL to service description] UPnP( NOTIFY with SSDP:alive) GAS Req [UPnP: GET: XML for service description] GAS Res [UPnP:XML for service description] UPnP (M-SEARCH: urn:schemas- upnp-org:service:PrintBasic:1) UPnP (URL to service description) Broadcast [Service Indication] For post- Association Proxy Get Service info Generate UPnP Message Translate into GAS GAS Req [UPnP: PrintBasic] Service Name or Service hash ID exchange Generate UPnP Message Translate into GAS

9. doc.: IEEE 802.11-14/0374r0 Submission Opaque Mode for PAD STA uses general service name or service hash in service query STA don’t need to handle UPnP syntax for PAD service query Proxy may caches service information and broadcast service indication Proxy generates UPnP message to Service provider Proxy needs to translate UPnP message into GAS for STA March 2014 Ping FANG, HuaweiSlide 9

10. doc.: IEEE 802.11-14/0374r0 Submission March 2014 Ping FANG, HuaweiSlide 10 Two Possible Approaches for 11aq 1.Both transparent approach and opaque approach works for 11aq 2.Transparent approach a)Less requirement on Proxy b)Proxy encapsulates and decapsulates message between STA and service provider c)STA need to generate service query with higher layer syntax before association 3.Opaque approach a)More requirement on Proxy b)Proxy needs to parse the message between service provider and supplicant, generate higher layer service query message from STA’s query, and generate MAC message for STA from higher layer service response c)STA user general service name/hash in PAD service query & response d)Proxy may caches Service information, and indicate supported services to STAs e)STA may get response much faster

11. doc.: IEEE 802.11-14/0374r0 Submission References 1.IEEE Std 802.11™-2012 2.UPnP Device Architecture 1.0 - UPnP Forum 3.Printer:1 Device Template Version 1.01. For UPnP™ Version 1.0 4.PrintBasic:1 Service Template Version 1.01. For UPnP™ Version 1.0 March 2014 Ping FANG, HuaweiSlide 11