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Stage 1 WLL Service Definitions

Stage 1 WLL Service Definitions. Submit toTR45.5/3GPP2 Committee by CDG-WLL Team Presented by Julia Kwok, Vice Chair of CDG-WLL Team October 11, 1999. Abstract.

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Stage 1 WLL Service Definitions

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  1. Stage 1 WLL Service Definitions Submit toTR45.5/3GPP2 Committee by CDG-WLL Team Presented by Julia Kwok, Vice Chair of CDG-WLL Team October 11, 1999

  2. Abstract • This contribution introduces Stage 1 call control and call implementation services required for CDMA systems to provide Wireless Local Loop (WLL) applications. CDG-WLL Team

  3. IS-95 WLL Services • Call Control support (hook detection, co-existence of call waiting/3Way calling), • Reliable DTMF with the EVRC • Others (to be added in the future) CDG-WLL Team

  4. Goals • Ensure competitiveness of WLL by enabling the provision of wireline and quasi-wireline equivalent WLL services • Establish common testable interfaces to promote inter-operability among various equipment vendors. CDG-WLL Team

  5. Objectives • Identify enhancement to IS-2000 and IS-95B that will better support WLL Applications • Accomplish stage 1-3 standard work for identified features • Identify & address additional capabilities in the future CDG-WLL Team

  6. Background • Several service providers identified & prioritized crucial WLL features at May & June CDG-WLL meetings. • Discussion based on a contribution submitted by Motorola & Lucent. • Both companies accepted the assignment of developing Stage 1-3 for the high priority services. CDG-WLL Team

  7. A Need for Standards of the Identified Areas • Standards Activities: • “Wireline Replacement System Requirement” (PN-4276) • “Analog Group 3 Fax” (PN-4372) • “Application of A-Interface Standards to Wireless Local Loop” (PN-3964) • Absence of existing standards to address the identified call control & implementation areas which are necessary to provide wireline equivalent services. CDG-WLL Team

  8. Market Demand For Services • Hook Detection is essential to managing the call-state and finite-state-machine (FSM) info., and provisioning of wireline- equivalent call or alternate call treatments. • Co-existence of Call Waiting &Three-Way calling is a wireline-equivalent capability. • Reliable receipt of DTMF Tone signaling Detection is a fundamental capability. CDG-WLL Team

  9. Functions of Call Control • Provides support of end-to-end signaling of call state information necessary to establish, maintain, or release a call. • Is required to administer the call state & finite state machine (FSM) of a call. CDG-WLL Team

  10. Call Control • Two services are needed because the call state & FSM information requirements of Wireline & Wireless differ: • Wireline Terminal Switch-Hook State Changes • Co-existence of Call Waiting and Three-Way Calling CDG-WLL Team

  11. Wireline Terminal Switch-Hook State Changes • Issue: A need for the infrastructure equipment to know the switch hook status of the terminals e.g. on hook or off hook status. • Impact: this info allows infrastructure to • provide alternate call treatments, busy tone, hunt features, hotline features and • determine stuck off hook conditions CDG-WLL Team

  12. Wireline Terminal Switch-Hook State Changes • This service reports terminal hook status and hook status changes generated at the analog handset. CDG-WLL Team

  13. Co-existence of Call Waiting & Three-Way Calling • Issue: The IS-95B standard does not contain the messaging that allows the WLL terminal equipment to make the differentiation between: • initiating a three-way call (terminal equipment must generate a dial tone) versus • a call-waiting call (terminal equipment should not generate a dial tone). CDG-WLL Team

  14. Co-existence of Call Waiting & Three-Way Calling • This service uses a Flash with Info Message to indicate whether: • a call-waiting call is present, and • the calling party is no longer available. • If a Flash hook is initiated between the receipt of these two messages, then the WLL terminal shall interpret this as an incoming call & shall not generate dial tone. CDG-WLL Team

  15. DTMF Signaling with EVRC • Issue: WLL peripheries require reliable receipt of DTMF Tone signals. • Problem: EVRC distorts DTMF signals. CDG-WLL Team

  16. DTMF Signaling with EVRC • Impact: the terminating end cannot be controlled reliably via DTMF tones. • Example: can leave but is not able to retrieve messages from an answering machine. CDG-WLL Team

  17. DTMF Signaling with EVRC • Ensure reliable transportation of DTMF tones over the air interface when EVRC is used. • Developed Stage 2 and 3 Inter-operability Test Plan. CDG-WLL Team

  18. Recommendations • TR45.5 and 3GPP2 review and refine the contributions • Incorporate the proposed WLL modifications into: • IS-95B • IS-2000 Release A CDG-WLL Team

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