The Integration of the Capabilities of Wireless Sensor Networks in 3GPP IMS: Case Study and Potential Issues for Standardization

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1 The Integration of the Capabilities of Wireless Sensor Networks in 3GPP IMS: Case Study and Potential Issues for Standardization Roch H. Glitho, PhD, Ericsson ETSI Workshop on Machine to Machine Standardization 4-5 June 2008, ETSI, Sophia Antipolis, France Roch Glitho EMC/Q

2 Wireless Sensors and End-User Services Sensors. l 2

3 Wireless Sensors and End-User Services Wireless sensors can capture a rich set of contextual information Space (e.g. refined location, velocity) Physiology (e.g. pulse, blood pressure) Environment (e.g. noise level, temperature) This information can be used in conjunction with IMS capabilities to build a wide range of end-user services Enhanced version of existing services Brand new services Several potential application areas Healthcare Gaming Life style assistance and many more... l 3

4 The problem at hand How to integrate in a standardized way the islands of wireless sensor networks and IMS for end-user services ASs MRF UE Acces s networ k P-CSCF S-CSCF I-CSCF BGCF HSS PSTN GWs SLF l 4

5 The Case Study (A shot at the problem) To probe further: [1] May El Barachi, Arif Kadiwal, Roch Glitho, Ferhat Khendek,and Rachida Dssouli, An Architecture for the Provision of Context-Aware Emergency Services in the IP Multimedia Subsystem, Proceedings of the IEEE 67th Vehicular Technology Conference (VTC 2008-Spring), May 11-14, 2008, Marina Bay, Singapore. [2] May El Barachi, Arif Kadiwal, Roch Glitho, Ferhat Khendek,and Rachida Dssouli, A Presence-based Architecture for the Integration of the Sensing Capabilities of Wireless Sensor Networks in the IP Multimedia Subsystem, Proceedings of the IEEE Wireless Communications and Networking Conference 2008 (WCNC' 08), March 31 - April 3, 2008, Las Vegas, Nevada, USA. Roch Glitho EMC/Q

6 Outline Motivating scenarios A presence based approach Prototypes l 6

7 Scenario I: Pervasive Game l 7

8 Scenario II: Enhanced Emergency Service Fire incident occurring at night, in a place with a defective fire detector. The victim (an elderly person, mainly speaking a foreign language, wearing physiological sensors) is trapped in the burning apartment building, and calls 911 using her 3G terminal. WSNs are used to detect and convey the user s contextual information (i.e. spatial, physiological, and environmental data) to the network. Location (address + room ID): to determine PSAP servicing the concerned geographic area & dispatch responders to exact room where user is located (for improved response time) This location information is a refinement of the location information used today in mobile emergency services (mainly consisting of a cell ID). Environmental data (e.g. temperature, humidity, noise level) is conveyed to the fire fighters to enable a better assessment of the situation and tracking of fire progress. Physiological data: The user s vital signs are monitored and communicated to ambulance Others: Info about the user s surrounding people/devices is used by the PSAP operator to guide the user towards the nearest first aid kit, fire extinguisher, oxygen mask in the building, or even a person with medical training who can provide temporary assistance until the ambulance arrives. - l 8

9 A Presence Based Approach WSN WSN Gateway (PEA) Pex b Extended PS P wn P wp Pex a Presentity presence proxy P w Watcher presence proxy Watchers P w P w IMS AS (e.g. GS) IMS user applications IMS core network entity (e.g. CSCF) l 9

10 A Presence Based Approach Functional entities: The WSN gateway: Assigned the role of PEA: Publishes the info provided by WSNs to the extended PS, via a trusted node (presence proxy), over the Pex a interface - The direct interaction between the GW and the PS is motivated by the fact that several support functions (e.g. identification and charging, authentication/ authorization, and security associations establishment) which are already supported by the presentity proxy, could be leveraged by including the proxy as intermediary node Directly interacts with the PS over the Pex b interface, for the mgmt of subscription policies The extended PS: Manages and processes WSNs related info The info consumers: end-user applications, IMS Ass, and IMS core network entities (e.g. CSCFs) Act as watchers to info published in PS, and use this info to provide value-added services to end users. Interfaces: Inbound interfaces: Pex a : Used for secure info exchange, registration, identification/charging, authentication/authorization Pex b : Used for the mgmt of subscription policies Outbound interfaces: Pw: an enhancement of the existing interface which enables end-user applications and IMS Ass to access info managed by the PS, via presence proxies Pw n : Enables network entities acting as watchers to get direct access to information from the PS l 10

11 Prototypes Fruit Quest Pervasive Game WSN gateway Area 1 Area 2 Area 3 Cricket beacons Player (with attached cricket listener) Cricket beacons Player (with attached cricket listener) Extended PS + CSCF + HSS game server Cricket beacons Player (with attached cricket listener) Components used: -JAIN SIP server: * XML schema extended * Registrar and proxy functionalities are enhanced to emulate very simple CSCF and HSS components, with are colocated with the PS -Existing web service based WSN gateway: remodeled to act as PEA - A game server: acting as client Test scenario: -Game server is used to register as IMS corporate user -Cricket beacons are used to detect the location of players and this info is conveyed to the GW which publishes it to the PS -The published info is accessed by the game server l 11

12 Prototypes Enhanced Emergency Service IMS simulated environment (Extended PS, CSCFs, HSS, CRF) WSN gateway Area 1 Area 2 Cricket beacons First aid kit (with attached cricket listener) l 12 Hospital Ambulance personnel Fire fighter PSAP call taker Cricket beacons User s laptop (with attached cricket listener & environmental sensor) Components used: -Existing IMS simulated environment (Ericsson s SDS) was extended: LRF enhanced & the CIB s information model extended -Existing web service based WSN gateway: remodeled to act as PEA Test scenario: -Clients were used to register as IMS users. -Cricket beacons/listeners were used to detect the location of the caller s laptop and of a first aid toolkit. An MTS300/Mica2 sensor attached to the user s laptop was used to detect environmental conditions. - All this information was conveyed to the WSN gateway, which publishes it (after proper formatting) in the extended presence server -The published information was then accessed by the CRF and used for contextaware routing to the PSAP and the conveying of the needed info to the clients.

13 Standardization. Roch Glitho EMC/Q

14 Potential issues Functional entities for integrating sensing and actuation capabilities in 3GPP IMS Enhanced versions of current 3GPP functional entities (e.g. presence server) And/or New functional entities Inbound interfaces (i.e. Interfaces from the sensing/actuation world to IMS) Common functions (e.g. charging, security, publication/discovery) Exchange of actual data Outbound interfaces (i.e Interfaces from IMS sensing/actuation functional entities to IMS and non IMS application servers) l 14

15 Potential starting point Technical Report (TR) on the feasibility of integrating sensing and actuation capabilities in the IP Multimedia Subsystem Purpose and benefits of the integration including motivating scenarios Integration Use Cases relying on different business models (e.g. sensing and actuation infrastructure owned by IMS service providers vs. sensing and actuation infrastructure owned by a third party) Description of integration process High level requirements l 15

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A Presence-based Architecture for the Integration of the Sensing Capabilities of Wireless Sensor Networks in the IP Multimedia Subsystem

A Presence-based Architecture for the Integration of the Sensing Capabilities of Wireless Sensor Networks in the IP Multimedia Subsystem May El Barachi, Arif Kadiwal Concordia University, Montreal, Canada