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List of Abbreviations

NTP: Network Time Protocol OAM&P: Operations, Administration, Maintenance & Provisioning OCF: Online Charging Function OCS: Online Charging System OFCS: Offline Charging System OMA: Open Mobile Alliance OMTP: Open Mobile Terminal Platform OP: Organizational Partners OS: Operating system OSA: Open Services Access OSI: Open Systems Interconnection OSS: Operations Support System; Operational Support System OTA: Over The Air PAG: Presence and Availability Group PBX: Private Branch Exchange PCEF: Policy and Charging Execution Function PCG: Project coordination group PCM: Pulse Code Modulation PCRF: Policy and Charging Rules Function P-CSCF: Proxy-Call Session Control Function PDF: Policy Decision Function PDG: Packet Data Gateway PDP: Packet Data Protocol PEAB: Presence Enabled Address Book PIDF: Presence Information Data Format PLMN: Public Land Mobile Network PNA: Presence network agent PoC: Push-to-Talk over Cellular POTS: Plain Old Telephone Service PPR: Push-Profile-Request PRACK: Provisional Response ACKnowledgement PRD: Permanent Reference Document PS: Packet Switch; Presence Server PSTN: Public Switched Telephone Network PTT: Push-to-Talk PTV: Push-to-Video PUA: Presence user agent PUID: Public User Identity QoE: Quality of Experience QoS: Quality of service RADIUS: Remote Authentication for Dial In User Service RAN: Radio Access Network RAND: Random challenge

RCS: Rich Communication Suite RES: Response REST: REpresentational State Transfer RF: Rating Function RFC: Request for Comments RLS: Resource list server RPID: Rich Presence Information Data RSS: Really Simple Syndication RSVP: Resource Reservation Protocol RTCP: RTP Control Protocol RTP: Real-time Transport Protocol RTSP: Real-time Streaming Protocol SA: System Aspect SAA: Security-Assignment-Answer; Server-Assignment-Answer SAP: Session Announcement Protocol SAR: Security-Assignment-Request; Server-Assignment-Request SB: Service Broker SCE: Service Creation Environment SCS: Service Capability Server SCIM: Service Capability Interaction Manager SCP: Service control point S-CSCF: Serving-Call Session Control Function SCTP: Stream Control Transmission Protocol SDF: Service Delivery Framework SDO: Standards Development Organization SDP: Service Delivery Platform/Session Description Protocol SEG: Security Gateway SET: SUPL Enabled Terminal SGSN: Serving GPRS Support Node SGW: Signaling Gateway SHLR: Stand-alone HLR SIMPLE: SIP Instant Messaging and Presence Leveraging Extensions SIP: Session Initiation Protocol SIPPING: Session Initiation Proposal Investigation SLA: Service Level Agreement SLEE: Service Logic Execution Environment SLC: SUPL Location Center SLF: Subscriber Locator Function SLP: SUPL Location Platform SME: Short Message Entity SMPP: Short Message Peer-to-Peer Protocol SMS: Short Message Service SMSC: Short Message Service Center

SMTP: Simple Mail Transfer Protocol SOA: Service-Oriented Architecture SPC: SUPL Positioning Center SPR: Subscriber Profile Repository SQN: Sequence number SS7: Signaling System Number 7 SSO: Single Sign-On STB: Set-top box SUPL: Secure User Plane Location TBCP: Talk Burst Control Protocol TDMA: Time Division Multiple Access THIG: Topology Hiding Inter-network Gateway TMF: Tele-Management Forum TN: Telephone number TP: Technical Plenary TSG: Technical Specification Group TTA: Telecommunications Technology Association TTC: Telecommunications Technology Committee TTL: Time-to-Live TUI: Telephone User Interface UA: User agent UAA: User-Authorization-Answer UAC: User Agent Client UAR: User-Authorization-Request UAS: User Agent Server UDP: User Datagram Protocol UE: User equipment UI: User interface UICC: Universal Integrated Circuit Card UMS: User Mobility Server UMTS: Universal Mobile Telecommunications System UNI: User-to-Network Interface URI: Uniform Resource Identifier URL: Uniform resource locator UTC: Universal Time Coordinates UTRA: Universal Terrestrial Radio Access VHE: Virtual Home Environment VoIP: Voice over IP VPN: Virtual private network WAP: Wireless Application Protocol WCDMA: Wideband CDMA WG: Working group WID: Work Item Description

WIN: Wireless Intelligent Network winfo: Watcher information WLAN: Wireless local area network WSML: Web Services Mark-up Language XCAP: XML Configuration Access Protocol XCON: Centralized Conferencing XDM: XML document management XDMC: XDM client XDMS: XML document management server XML: eXtensible Markup Language XMPP: Extensible Messaging and Presence Protocol XRES: Expected response XUI: XCAP User Identifier