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DECT-Radio Fixed Part improvement

 

Some years ago Telecom Italia decided to cover the most populous urban areas with the Cordless Terminal Mobility service (CTM) based on DECT technology. The base stations (RFP) were distributed along the streets of the major Italian cities every 200m. Ericsson was one of the suppliers of the infrastructure, and I was the technical responsible of the RFP design of this project. The main ASIC (Application Specific Integrated Circuit) used to design the RFP works fine, but there was a strange bug on the synchronization achitecture which causes in some situations an evident degradation of performance in terms of word error ratio (WER). It was very very difficult to find the solution, anyway it was identified and submitted to the Telecom Italia LAB (CSELT). I had the compliments for this smart solution.

 

A copy of the original document which describes the solution is available HERE (just in Italian, sorry).

 

 

Alcuni anni fa Telecom Italia decise di coprire le aree urbane più popolate con il servizio CTM basato sulla tecnologia DECT. Le stazioni radio base (RFP) erano distribuite lungo le strade delle maggiori città italiane ogni 200m. Ericsson era uno dei fornitori dell'infrastruttura ed io ero il Responsabile tecnico del Progetto della RFP. Il circuito integrato principale della RFP funzionava bene, ma c'era uno strano baco sull'architettura di sincronizzazione che in alcune situazioni causava una evidente degradazione delle prestazioni in termini di WER. E' stato molto molto difficile trovare la soluzione, comunque essa è stata identificata e sottoposta a Telecom Italia LAB (ex CSELT). Ho ricevuto i complimenti per questa "furbata".

 

Una copia del documento originale che descrive la soluzione è disponibile QUI .


 


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