While there is little incentive for European operators to think about LTE carrier aggregation at the moment, things might be different for US operators that have a couple of megahertz in one band and a couple of megahertz in another (relatively speaking to the large 20 MHz bands used in Europe). So I was a bit surprised when reading this whitepaper by Nomor research that points out that inter-band carrier aggregation is only introduced in 3GPP Release 11, which is not even yet out the door. In other words, we are at least 2 or 3 years away from mobile devices (and networks) that might actually be able to combine carriers in different bands. Very strange, I would have thought US carriers would have been more insisting to get this functionality sooner…
P.S.: The paper also contains interesting details on how a correct timing advance is ensured in inter-band carrier aggregations HetNet situations where antennas are distributed and connected via fiber links and timing advance to different component carriers can be different.
One thought on “Inter-Band LTE Carrier Aggregation only in 3GPP Release 11”
Actually DL inter-band carrier aggregation is already introduced in Rel-10
Maybe the paper is referring to UL inter-band carrier aggregation.
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