Mobile Backhaul Base Station Using Decoupled Wired and Air Interfaces
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Solution Overview
Problem
Existing DOCSIS systems face challenges in increasing capacity and meeting network synchronization requirements for mobile backhaul, which are costly to improve.
Innovation Solution
A communication device comprising a mobile termination device for backhaul signals over a wired connection and a radio base station for access signals over the air, utilizing cellular mobile communication standards, with frequency converters to adapt signal configurations for efficient data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the number of homes passed per fibre node is increased to 500, then the network coverage is improved, but the data transfer rate deteriorates to only 20 Mbit/s downlink and 2 Mbit/s uplink
Solution Approach 1:
The system segments the network into multiple fibre nodes, each serving a smaller group of homes (e.g., 100 homes per node instead of 500). This segmentation allows each node to provide higher data rates to its served homes while the overall network coverage is maintained through the distributed node structure.
Solution Approach 2:
The patent introduces a new dimension to the network architecture by deploying multiple fibre nodes in different geographical locations. This spatial distribution allows the network to maintain high data rates for each node while collectively covering a large area through the combined capacity of multiple nodes.
2Speed
If amplifiers are replaced with hubs to increase data rates, then the data transfer rate is improved fivefold to 100 Mbit/s downlink and 10 Mbit/s uplink, but the device complexity and infrastructure cost worsen due to increased number of hubs requiring more fibre to be laid
Solution Approach 1:
The patent changes the operational parameters of the DOCSIS system by introducing cellular mobile communication standards (4G LTE, 5G NR) for backhaul signals. This parameter change enables the system to achieve higher data rates and better synchronization without requiring a complete infrastructure overhaul, thus avoiding the complexity increase associated with deploying multiple hubs.
Solution Approach 2:
The communication device performs multiple functions: it serves as both a DOCSIS customer premises equipment for wired broadband access and a cellular base station for mobile backhaul. This multi-functionality allows the system to achieve high data rates and meet synchronization requirements without requiring separate infrastructure components, thereby reducing overall device complexity.
3Ease of manufacture
If DOCSIS systems are used for mobile backhaul, then the existing infrastructure is utilized, but the network synchronization requirements worsen as current DOCSIS technology does not meet the high synchronization requirements
Solution Approach 1:
The patent changes the communication standard parameter from traditional DOCSIS to cellular mobile communication standards (4G LTE, 5G NR) for backhaul signals. This parameter change maintains compatibility with existing DOCSIS infrastructure for wired access while providing the high synchronization capability required for mobile backhaul applications.
Solution Approach 2:
The communication device acts as an intermediary between the DOCSIS wired network and the mobile network. It receives backhaul signals conforming to cellular standards over the wired connection and translates/adapts them for wireless transmission to local devices, thereby bridging the synchronization gap between DOCSIS infrastructure and mobile backhaul requirements.
Data Source
AI summary
It is provided a communication device comprising: a first wired connection interface for communicating backhaul signals with more central equipment over wired connection; a mobile termination device configured to transmit and receive the backhaul signals, wherein the backhaul signals conform to a cellular mobile communication standard; a radio base station, connected to the mobile termination device, wherein the radio base station is configured to transmit and receive access signals, conforming to a cellular mobile communication standard, to and from at least one local device, the access signals containing same payload data as corresponding backhaul signals; and at least one antenna port for communicating the access signals over the air.