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• Switching Solutions
• All-in-one-box Solutions
  • IP RAN
  • HSPA Backhaul
  • WiMAX Convergance
  • 2G Optimization
• Mobile Backhaul Challenges
• Mobile Backhaul Optimization

The emerging trend of using mobile WiMAX as broadband technology can assist operators in providing broadband service where 3G (HSDPA/HSUPA) is not available or not adequate to meet market demand. Especially in collocated WiMAX and GSM installations, converging mobile or wireline services into a unified packet-based backhaul network can improve capacity and service delivery, while also reducing network expenses.

However, owing to the different nature and transport requirements of GSM and WiMAX services, the challenges of convergence are many. Voice-centric GSM services consist of multiple small-payload sessions, over varied transport technologies and legacy infrastructure. Because GSM network backhaul is TDM-based, without possibility of statistical multiplexing, the impact of GSM traffic in the aggregation network increases as its traffic share grows relative to the statistically multiplexed WiMAX traffic. By contrast, WiMAX generates data-centric traffic, with large payloads for each session. WiMAX transport is IP-based, requiring a high-capacity packet-switched backhaul network, where the statistical gain achieved by aggregation reduces backhaul traffic and consequently the cost of operation and maintenance.

Thus, convergence of GSM and WiMAX services requires:

• An efficient mechanism for converting GSM traffic into packet-based switching
• Adapting packetized GSM traffic to a unified, scalable, and manageable packet-switched transport to ensure strict service requirements
• Providing strict frequency synchronization throughout the backhaul network

DynaMate™ mobile backhaul switching solutions from Celtro enable optimal convergence of all 2G and WiMAX traffic over one unified and dynamically shared packet-based backhaul network. With Celtro solutions, providers gain improved traffic efficiency and delivery of greater capacity over existing backhaul infrastructure, simplified network management and provisioning and reduced CapEx and OpEx.

• Converting GSM into optimal packet-switched traffic
  Based on the integration of unique 2G optimization technology with standard TDM/ATM/Ethernet and MPLS switching capabilities, Celtro DynaMate mobile backhaul switching solutions identify backhaul traffic components (voice, data, BSS signaling), eliminate inefficiencies and redundancies, and packetize actual information-carrying traffic as a variable bit-rate flow to ATM or MPLS – allocating bandwidth in real-time and differentiating QoS for different types of traffic.
• Unifying the transport for 2G and WiMAX
  Celtro’s innovative mobile switching solutions deliver a unified GSM/ WiMAX transport mechanism uniquely suited to existing transport infrastructure. For example, if a high capacity packet transport infrastructure is already in place, MPLS is preferable - if PDH (E1) transport infrastructure is in place, ATM is ideal.
• Synchronizing over packet-switched networks
  To function properly, TDM networks require highly accurate frequency information to be recoverable from their physical layers. By contrast, IP/MPLS and Ethernet-based networks do not require synchronization. Celtro handles the challenges of synchronization over packet-switched networks, providing full network synchronization to all cell sites.

• Capacity: better backhaul performance, more capacity and service delivery over existing infrastructure
• Service Delivery: rapid service introduction with QoS support and guaranteed peak rate for customer Quality of Experience (QoE)
• Flexibility: 2G and WiMAX traffic over one unified and dynamically shared packet-based backhaul network
• Cost: network OpEx and CapEx
• Future-Proof: smooth, one-box software-based, adaptive migration to new radio and backhaul technologies
• Trusted: Field-proven solution with largest installed base in the market