Conformance test system can extend LTE-A usage

With this validation of LTE-Advanced Pro uplink 64QAM and LTE-Advanced uplink carrier aggregation, Rohde & Schwarz says it is paving the way for wireless operators worldwide to make use of the latest LTE features. Both functionalities will grant individual users higher uplink data rates and offer all users higher average uplink data rates.

The validation took place at the recent Global Certification Forum (GCF) meeting CAG#46 in New Jersey, USA, supported by leading wireless network operators and cellular equipment manufacturers. LTE uplink carrier aggregation (LTE UL CA) is a new feature in the 3GPP Rel. 12 specification that combines two LTE uplink channels for a single user, effectively doubling the uplink data rate.

This feature increases the currently available maximum uplink rate of 50 Mbit/s per LTE user to 100 Mbit/s per LTE user (using the traditional 16QAM modulation in the uplink). LTE UL 64QAM was introduced in 3GPP Rel. 13 as a new modulation scheme for the LTE uplink.

It boosts the uplink data throughput by transmitting 6 bits per transmitted LTE uplink symbol instead of the current 4 bits per LTE uplink symbol with 16QAM.

This translates to a 50 percent increase in uplink data speed. LTE 64QAM is part of LTE-Advanced Pro, which is intended to mark the point in time where the LTE platform has been dramatically enhanced to address new markets as well as adding functionality to improve efficiency. When these features are combined, LTE UL CA and LTE UL 64QAM enable a new maximum uplink data rate of 150 Mbit/s.

This takes LTE-Advanced to the next level, with both downlink and uplink peak data rates now surpassing 100 Mbit/s.

Higher data rates in the LTE uplink finally address the main bottleneck caused by today's hunger for more data that is mainly due to social networking and cloud services.

The R&S TS8980 from Rohde & Schwarz is a scalable and validated GCF and PTCRB test system. It provides test coverage for Rel. 8 to Rel. 13 versions of 3GPP 36.521-1 (TX, RX, and performance), 36.521-3 (radio resource management - RRM) and supplementary RF/RRM test plans for wireless network operators.

The recent validations are part of the ongoing commitment of Rohde & Schwarz to be the leading manufacturer of conformance test equipment and to help network operators, chipset and mobile device manufacturers certify their user equipment and keep service quality high in wireless cellular networks.