Fronthaul and backhaul integration (Crosshaul) for 5G mobile transport networks

Fronthaul and backhaul integration (Crosshaul) for 5G mobile transport networks

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In this context, the distinction between fronthaul and backhaul transport networks blurs as varying portions of functionality of 5G points of attachment (5GPoAs) might be moved towards the network as required for cost efficiency reasons. The traditional capacity overprovisioning approach on the transport infrastructure will no longer be possible with 5G. Hence, a new generation of integrated fronthaul and backhaul technologies will be needed to bring capital expenditure (CAPEX) and operational expenditure (OPEX) to a reasonable return on investment (ROI) range. Also, for cost reasons, the heterogeneity of transport network equipment must be tackled by unifying data, control and management planes across all technologies as much as possible. A redesign of the fronthaul/backhaul network segment is a key point for 5G networks as current transport networks cannot cope with the amount of bandwidth required for 5G. Next-generation radio interfaces, using 100 MHz channels and squeezing the bit-per-megahertz ratio through massive multiple-input and multiple-output (MIMO) or even full-duplex radios, require a ten-fold increase in capacity, which cannot be achieved just through the evolution of current technologies.

Chapter Contents:

  • 18.1 Motivation and use cases for fronthaul and backhaul integration
  • 18.1.1 Motivation
  • 18.1.2 Use cases
  • Service-oriented use cases
  • Functional-oriented use cases
  • 18.2 Architectural solutions and components
  • 18.3 5G-Crosshaul architecture
  • 18.3.1 Overview
  • 18.3.2 Main components
  • 18.4 Common framing and switching elements
  • 18.5 Control infrastructure
  • 18.5.1 XCI high-level architecture
  • 18.5.2 XCI SDN controller
  • 18.5.3 Deployment models of XCI
  • 18.6 Enabled applications
  • 18.6.1 Resource management application (RMA)
  • 18.6.2 Multi-tenancy application
  • 18.6.3 Energy management and monitoring application
  • 18.6.4 Mobility management application
  • 18.6.5 Content delivery network management application
  • 18.7 Standardization for the 5G-integrated fronthaul and backhaul
  • Acknowledgement
  • References

Inspec keywords: mobility management (mobile radio); 5G mobile communication; MIMO communication; channel capacity; wireless channels; next generation networks

Other keywords: multiple-input and multiple-output communication; next-generation radio interface; CAPEX; crosshaul integration; backhaul transport network; capital expenditure; capacity overprovisioning approach; fronthaul transport network; 5G points of attachment; integrated backhaul technology; 5G mobile transport network; frequency 100 MHz; integrated fronthaul technology; OPEX; return on investment; 5GPoA; ROI; full-duplex radio; MIMO communication; operational expenditure

Subjects: Mobile radio systems; Network management

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