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Higher data rate enhances 4G support

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Edited by the Electronicstalk editorial team Oct 1, 2008

The Open Base Station Architecture Initiative (OBSAI) has announced a doubling of the maximum data-rate capability of its baseband to RF module (RP3) interface.

This new higher data rate further enhances OBSAI's support for emerging 4G architectures and services and also allows both existing and future RF modules to be 'daisy-chained', thereby saving cabling costs in distributed base-station deployments.

The new data-rate capability of OBSAI has been achieved by incorporating aspects of the Serial RapidIO (SRIO) standard within the OBSAI RP3 specification, thereby leveraging the considerable industry support already in place for the SRIO standard.

To accommodate a higher data rate, the existing OBSAI electrical specification has been extended to include relevant parts of the SRIO standard and it can now support a data rate of up to 6144Mbps.

The increasing requirements for higher line-rates for the RP3 link were also driven by the desire to be able to 'daisy-chain' remote radio heads, for both 3G and 4G applications.

Daisy chaining allows remote radio heads to be connected in series rather than each one requiring a direct connection back to the base station - this saves significantly on electrical cable or fibre-optic cable in such installations, driving efficiency savings for the operator.

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