Trillium 2G / 2.5G wireless protocol software enables network equipment providers to build a complete suite of 2G / 2.5G wireless communication devices and wireless solutions – from core network elements to mobile terminals.

Trillium 2G / 2.5G Wireless Software Powered Network Elements

  • Base Station Controller (BSC)
  • Base Transceiver Station (BTS)
  • Call Session Control Function (CSCF)
  • Charging Gateway Function (CGF)
  • Gateway GPRS Support Node (GGSN)
  • Home Location Register (HLR)
  • Mobile Switching Center (MSC)
  • Serving GPRS Support Node (SGSN)
  • Visiting Location Register (VLR)

2.5G Wireless (GPRS)

Continuous Computing offers a comprehensive protocol software solution that encompasses all the new components of the GPRS network. Trillium GPRS can be interfaced with the existing Public-Switched Telephone Network (PSTN) infrastructure. Furthermore, Trillium GPRS software inter-works with Trillium MAP-GSM Phase 2+ software so that existing GSM systems can be easily upgraded to support GPRS services.

GPRS Stack Diagram

DIagram GPRS Stack

GPRS Network Architecture

DIagram GPRS Network Architecture

The following is a brief description of each protocol layer in the GPRS network infrastructure:

  • Base Station GPRS Protocol (BSSGP)
    Processes routing and quality of service (QoS) information for the BSS. BSSGP uses the Frame Relay Q.922 core protocol as its transport mechanism.
  • BSSAP+
    Protocol that enables paging for voice connections from MSC via SGSN, thus optimizing paging for mobile subscribers. BSSAP+ is also responsible for location and routing updates as well as mobile station alerting.
  • Camel Application Part (CAP)
    Provides mechanisms to support operator services beyond standard GSM services for subscriber roaming within our outside the HPLMN. Furthermore, CAP extends the IN framework to GSM network for implementing IN services.
  • GPRS Mobility Management (GMM/SM)
    Protocol that operates in the signaling plane of GPRS, handles mobility issues such as roaming, authentication, selection of encryption algorithms and maintains PDP context.
  • GPRS Tunnel Protocol (GTP)
    Protocol that tunnels the protocol data units through the IP backbone by adding routing information. GTP operates on top of TCP/UDP over IP.
  • Logical Link Control (LLC)
    A data link layer protocol for GPRS that functions similarly to Link Access Protocol-D (LAPD). This layer assures the reliable transfer of user data across a wireless network.
  • Mobile Application Part (MAP)
    Supports signaling between SGSN/GGSN and HLR/AuC/EIR.
  • Network Service
    Protocol that manages the convergence sub-layer that operates between BSSGP and the Frame Relay Q.922 Core by mapping BSSGP’s service requests to the appropriate Frame Relay services.
  • SCCP, MTP3, MTP2
    Protocols used to support Mobile Application Part (MAP) and BSSAP+ in circuit-switched PLMNs.
  • Sub-Network Dependent Convergence Protocol (SNDCP)
    Protocol that maps a network-level protocol, such as IP or X.25, to the underlying logical link control. SNDCP also provided other functions such as compression, segmentation and multiplexing of network-layer messages to a single virtual connection.

Protocols

TRILLIUM 2.5G WIRELESS SOFTWARE

  • BSSGP - Base Station System GPRS Protocol
  • CAP - CAMEL Application Part
  • GMM/SM - GPRS Mobility Management and Session Management
  • GTP - GPRS Tunneling Protocol
  • LLC - Logical Link Control
  • MAP 3G - 3G Mobile Application Part
  • NS - GPRS Network Service
  • RLC/MAC - GPRS Radio Link Control / Medium Access Control
  • SNDCP - SubNetwork-Dependent Convergence Protocol

TRILLIUM 2G WIRELESS SOFTWARE

  • MAP IS-41 - Mobile Application Part IS-41
  • SS7 - Signaling System 7

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