DECT Adaptor Module Cellular Handset Interoperability
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Solution Overview
Problem
There is a need for a method that allows cellular handsets to interoperate with DECT base stations to initiate and receive calls over a fixed network, while maintaining the capabilities of both cellular and DECT networks, and ensuring seamless communication without consuming wireless billing units.
Innovation Solution
A DECT adaptor module is used, which includes a processor, DECT transceiver, and data interface, configured to convert voice data between DECT and cellular formats, allowing cellular handsets to connect with DECT base stations via a data port, enabling call sessions over a fixed network while disabling cellular network voice transmissions during DECT mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cellular handset is used to make calls, then wireless communication capability is provided, but wireless billing units are consumed and interference from other wireless devices may occur
Solution Approach 1:
The adaptor module serves as an intermediary device that bridges the cellular handset and DECT base station. It receives call requests from the cellular handset, converts them into DECT protocol messages, and transmits them to the DECT base station via wireless DECT communication. This allows the cellular handset to communicate over the fixed DECT network without consuming cellular wireless billing units, while the adaptor handles the protocol conversion and network interaction.
2Loss of energy
If DECT base station is used for fixed network calls, then wireless billing units are not consumed, but cellular handsets cannot directly interoperate with DECT base stations
Solution Approach 1:
The adaptor module acts as a protocol translator and intermediary between the cellular handset and DECT base station. It receives data from the cellular handset via a data interface (such as USB), converts the cellular protocol messages into DECT protocol messages, and transmits them to the DECT base station using a DECT transceiver. This enables seamless interoperability between cellular handsets and DECT networks without requiring changes to the cellular handset hardware.
Solution Approach 2:
The adaptor module is designed to be universally compatible with various cellular handsets and DECT base stations. It implements both cellular protocol stack and DECT protocol stack, allowing it to function as a multi-functional device that can translate between different network protocols. The adaptor can be connected to different cellular handsets via standard data interfaces and communicates with DECT base stations using standard DECT protocols, providing broad compatibility across different device types.
3Adaptability or versatility
If adaptor module is introduced to enable cellular-DECT interoperability, then network versatility is improved, but device complexity increases
Solution Approach 1:
The adaptor module is a standalone device that externalizes the protocol conversion functionality, keeping the cellular handset simple while adding intelligence at the adaptor level. The adaptor contains both cellular and DECT protocol stacks, handling all the complex message translation and protocol conversion. This approach distributes system complexity across separate components rather than requiring a complex integrated solution.
Solution Approach 2:
The adaptor module consolidates multiple functions into a single device: it serves as a cellular modem, DECT transceiver, protocol translator, and network interface all in one unit. By making the adaptor universal and multi-functional, the overall system complexity is managed more efficiently than having separate dedicated devices for each function.
Data Source
AI summary
An embodiment of a method for initiating an outgoing call from a cellular handset to a fixed network using a DECT base station includes receiving an outgoing call request from a cellular handset by an adaptor module in communication with the cellular handset. The outgoing call request includes a request to establish a call session with a communication device over a fixed network. The method further includes sending a call set-up message to a DECT base station in response to receiving the outgoing call request. The DECT base station is configured to initiate an outgoing call to the communication device over the fixed network in response receiving the call set-up message. The method further includes receiving a call connect message from the DECT base station, and establishing a call session between the cellular handset and the communication device.