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SMS Overview

SMS Overview. Wang Changhong Motorola Beijing Design Center. Outline. SMS Protocol Stack R-UIM SMS Support. SMS Protocol Stack. General Description SMS Relay Layer. SMS Transport Layer SMS Teleservice Layer. General Description.

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SMS Overview

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  1. SMS Overview Wang Changhong Motorola Beijing Design Center

  2. Outline • SMS Protocol Stack • R-UIM SMS Support

  3. SMS Protocol Stack • General Description • SMS Relay Layer. • SMS Transport Layer • SMS Teleservice Layer

  4. General Description • The Short Message Service (SMS) allows the exchange of short messages between a mobile station and the wireless system, and between the wireless system and an external device capable of transmitting and optionally receiving short messages. The external device may be a voice telephone, a data terminal or a short message entry system.

  5. General Description (Cont.) • The Short Message Service consists of message entry features, administration features, and message transmission capabilities. These features are distributed between a wireless system and the SMS message center (MC) that together make up the SMS system. The MC may be either separate from or physically integrated into the wireless system.

  6. General Description (Cont.) • Short messages and acknowledgments can be transmitted to or from the mobile station whether it is idle or engaged in a voice or data call. • SMS provides support for PTP or Broadcast of messages. A broadcast message is not acknowledged by the mobile station. Broadcast Messaging Services may be made available to mobile stations on a CDMA Paging Channel or CDMA Forward Traffic Channel.

  7. General Description (Cont.) • Mobile-Originated: Submitted to an SMS service provider by a mobile station. • Mobile-Terminated: Delivered to a mobile station by an SMS service provider.

  8. General Description (Cont.)Network Reference Model

  9. General Description (Cont.)SMS protocol stack

  10. SMS Protocol Stack • General Description • SMS Relay Layer. • SMS Transport Layer • SMS Teleservice Layer

  11. SMS Relay Layer • The SMS Relay Layer provides the interface between the SMS Transport Layer and the Link Layer used to carry short message traffic.

  12. SMS Relay Layer (Cont.)Um Interface • On the Um Interface, the SMS Relay Layer supports the SMS Transport Layer by providing the interface to the TIA/EIA-95-B transmission protocols needed to carry SMS data between CDMA mobile stations and base stations.

  13. SMS Relay Layer (Cont.)N Interface • The N reference point is assumed to be an intersystem network link with connectivity to the MC. • SMS protocols and message formats on intersystem links may differ from those used on the CDMA air interface. The N Interface Relay Layer is responsible for formatting and parsing SMS messages as necessary when transmitting and receiving messages on the intersystem links.

  14. SMS Relay Layer (Cont.)Relay Layer Functions • Delivering Transport Layer messages to the next relay point or end point. • Error indications to the Transport Layer. • Forwarding messages to the Transport Layer. • Controlling the Link Layer used for message relay. • Formatting messages according to the SMS standards and/or other message standards.

  15. SMS Relay Layer (Cont.)Services Provided by the Relay Layer • The Um Interface Relay Layer provides Transport Layer message delivery between mobile station and base station. The service is provided as a point-to-point service and as a broadcast service. • The N Interface Relay Layer provides message delivery between the base station and the MC. This service is provided as a point-to-point service only.

  16. SMS Relay Layer (Cont.)Services Provided by Um Interface • Transmission of Data Burst Messages containing SMS data on the Access, Paging and Traffic Channels to/from specific mobile stations. • Reception of Data Burst Messages containing SMS data on the Access, Paging and Traffic Channels. • Determination of the maximum message size permitted on the Access, Paging and Traffic channels.

  17. SMS Relay Layer (Cont.)Services Required from N Interface • Delivery of SMS messages to an MC. • Reception of SMS messages from an MC. • Report of the success/failure of message delivery.

  18. Standard Data Burst Message Burst Type Assignments

  19. Standard Service Option Number Assignments

  20. SMS Protocol Stack • General Description • SMS Relay Layer. • SMS Transport Layer • SMS Teleservice Layer

  21. SMS Transport Layer • The SMS Transport Layer resides in SMS bearer service end points and relay points. In a bearer service end point, the SMS Transport Layer provides the means of access to the SMS system for Teleservices that generate or receive SMS messages. In a bearer service relay point, the Transport Layer provides an interface between Relay Layers.

  22. Transport Layer Functions (For Bearer Service End Points) • Receiving message parameters from SMS Teleservices Layer. • Informing the Relay Layer messages have been received. • Informing the Teleservices when Relay Layer errors are reported. • Receiving SMS messages from the Relay Layer and passing the messages to the SMS Teleservice. • In mobile stations, performing authentication.

  23. Transport Layer Functions (For Bearer Service Relay Points) • Receiving SMS messages from a Relay Layer, and forward to another Relay Layer. • Passing confirmations or error reports between the Relay Layers if requested. • In TIA/EIA-95-B base stations, performing authentication calculations.

  24. SMS Protocol Stack • General Description • SMS Relay Layer. • SMS Transport Layer • SMS Teleservice Layer

  25. SMS Teleservice Layer • The SMS Teleservice Layer resides in a Bearer Service end point. The Teleservice Layer supports basic SMS functions through a standard set of subparameters of the Transport Layer’s Bearer Data parameter.

  26. Service Type • Wireless Paging Teleservice (WPT). • Wireless Messaging Teleservice (WMT). • Voice Mail Notification (VMN).

  27. Data Burst Message Format

  28. Outline • SMS Protocol Stack • R-UIM SMS Support

  29. R-UIM SMS Support • EFSMS : This EF contains information in accordance with IS-637 comprising short messages (and associated parameters) which have either been received by the MS from the network, or are to be used as an MS originated message. • EFSMSP : This EF contains values for Short Message Service header Parameters (SMSP), which can be used by the Mobile Equipment (ME) for user assistance in preparation of mobile originated short messages.

  30. R-UIM SMS Support (Cont.) • EFSMSP : When a short message is to be sent from the Mobile Station (MS), the parameter in the R-UIM record, if present, shall be used when a value is not supplied by the user. • EFSMSS : This EF contains status information relating to the short message service. The provision of this EF is associated with EFSMS. Both files shall be present together, or both shall be absent from the R-UIM.

  31. References Standards • TIA/EIA-637-A Short Message Service for Spread Spectrum Systems. • TIA/EIA-95-B Mobile Station-Base Station Compatibility Standard for Dual-Mode Spread Spectrum Systems. • TSB58-A Administration of Parameter Value Assignments for TIA/EIA Spread Spectrum Standards.

  32. References Standards (Cont.) • TSB79 Short Message Services for Wideband Spread Spectrum Systems. • ANSI/TIA/EIA-41-D Cellular Radio-Telecommunications Intersystem Operations. • ANSI/TIA/EIA-664 Cellular Features Description. • TIA/EIA/IS-820 Removable User Identity Module (R-UIM) for TIA/EIA Spread Spectrum Standards.

  33. Questions

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