Optical Backhaul Switching Centralizes Network Control
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Solution Overview
Problem
The increasing complexity and cost of mobile network infrastructure due to the proliferation of access technologies and equipment from different vendors, along with the need for higher bandwidth and capacity, lead to high operational and maintenance costs, particularly in the backhaul network.
Innovation Solution
An optical connection between site nodes and a central node using a virtual switch unit that replaces active network equipment, reducing the need for costly electric switches and allowing for simpler network management by concentrating switching functions at the central node, with passive filter units providing cost-effective and long-lasting alternatives to active switching units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If active network equipment (switches and routers) is deployed at site nodes to enable redundant backhaul connections and traffic prioritization, then network reliability and traffic management capability are improved, but device complexity and operational costs at site nodes increase
Solution Approach 1:
The patent extracts the active switching functionality from site nodes and relocates it to a virtual switch unit in the core network. The physical switch hardware is removed from distributed site nodes, leaving only passive optical components, while the switching intelligence is centralized in the core network where it can serve multiple site nodes efficiently.
Solution Approach 2:
The patent merges the switching functions for multiple site nodes into a single virtual switch unit in the core network. Instead of having separate physical switches at each site node, the same switching resources are shared and virtualized to serve multiple site nodes, reducing overall device complexity while maintaining reliability through redundancy.
2Adaptability or versatility
If multiple active network equipment units are deployed at site nodes to support various access technologies and vendors, then network versatility and service capability are improved, but operational and maintenance costs increase
Solution Approach 1:
The virtual switch unit in the core network is designed to handle multiple access technologies (GSM, GPRS, EDGE, 3G/WCDMA, LTE, WiFi) and equipment from different vendors through a unified interface. This universal switching platform eliminates the need for site nodes to have specialized active equipment for each technology, reducing operational complexity while maintaining versatility.
Solution Approach 2:
The virtual switch unit acts as an intermediary between the diverse access technologies at site nodes and the core network services. It provides a standardized interface that mediates between different vendors' equipment and the network operations center, simplifying management and maintenance by consolidating control functions.
3Power
If optical connections are implemented between site nodes and core network, then bandwidth capacity is improved, but network complexity increases due to fragmentation of access solutions
Solution Approach 1:
The patent implements homogeneous optical connections for all site nodes accessing the core network, replacing fragmented electrical and wireless access solutions with a unified optical infrastructure. This standardization simplifies network management and reduces complexity while providing high bandwidth capacity through optical fiber connections.
Data Source
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AI summary
An arrangement in a network (10), comprising: a site node (100) arranged to comprise a base station (120), the base station (120) being adapted for termination of wireless communication, and a central node (140) arranged to comprise a service unit (160), the service unit (160) being adapted for communication with the base station (120), wherein the central node (140) comprises a central switch unit (155), adapted for switching of data between the base station (120) and the service unit (160), wherein the base station (120) and the central switch unit (155) are optically connected, thus enabling that communication is carried by light.