Multi-service Cellular Access Device Network Selection
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Solution Overview
Problem
Existing cellular access devices are limited in providing multi-service capabilities, as they either only amplify cellular signals or route calls through a single cellular operator's network, preventing access to IP-based services and toll avoidance, and do not allow calls to be placed using Internet Protocol Service Providers for improved quality.
Innovation Solution
A multi-service cellular network access device that determines and selects the best network to route calls based on available interfaces, including cellular, IP, and PSTN networks, allowing for voice over IP calls and access to additional services by using a service control logic to manage and translate signals between different network types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cellular retransmitter is used to amplify RF signals for in-house coverage, then cellular signal coverage is improved, but no additional services can be offered to the user
Solution Approach 1:
The access device is designed to perform multiple functions: it acts as a cellular retransmitter for signal coverage while simultaneously functioning as an IP networking device that provides access to IP-based services, presence, instant messaging, and other next generation services through integrated network interfaces
2Reliability
If a femtocell is used to provide cellular access over IP network, then cellular service is improved, but the handset is effectively connected to a single CellOp network and cannot access other services
Solution Approach 1:
The access device provides universal access to multiple network types (cellular, IP, PSTN) and services simultaneously, allowing the handset to access not only cellular services but also IP-based services, presence, instant messaging, and other next generation services through the same device
Solution Approach 2:
The device segments network access into separate functional interfaces: a cellular transceiver for cellular network access, an IP networking interface for IP network access, and a PSTN interface for traditional telephone network access, allowing independent operation of each network type
3Reliability
If existing cellular access devices are used, then cellular coverage is provided, but calls cannot be placed using IPSP for improved quality or toll avoidance
Solution Approach 1:
The service control logic dynamically selects which network interface (cellular, IP, or PSTN) to use for routing calls based on current network conditions, service requirements, and user preferences, enabling flexible call routing to IPSP for improved quality or toll avoidance when appropriate
Data Source
AI summary
An access device is described herein for determining and selecting, for a cellular call received by a cellular transceiver of the access device, one of a plurality of networks to route the call to. In some embodiments, the determining and selecting may be based at least on a type of each of a plurality of network interfaces of the access device and availability of each corresponding network, the network interfaces including at least two of a cellular retransmitter, an IP networking interface, or a PSTN interface. In various embodiments, if a cellular network is determined and selected, the access device may relay the call. Also, if an IP or PSTN network is determined and selected, the access device may establish on behalf of the call an outgoing call through the IP or PSTN network and translate signals of the cellular call to signals for the IP or PSTN network.