Huawei has demonstrated downlink dual carrier (DLDC) performance averaging up to 564 Kbps in a recent test for Enhanced Data Rate for GSM Evolution (EDGE).
Huawei said this EDGE+ technology enables operators to increase network data capacity and bring 3G experiences to 2G users over GSM networks. Advancing EDGE technology significantly improves user experience through faster data rates, better quality of service (QoS) and lower network latency. The increased performance is enabled via a software upgrade to the existing EDGE network.
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- In November 2009, Ericsson published a whitepaper recommending EDGE Evolution technology as an inexpensive means of delivering mobile data services over existing GSM networks at rates of up to 1 Mbps. The solution adds 3G-like capabilities to GSM, more than doubling end-user bit-rates and reduces latency significantly. Ericsson is the first vendor to offer EDGE Evolution capabilities.
Currently, EDGE offers user bit rates up to 250kbps, with end-to-end latency of less than 150ms. The company said EDGE Evolution can deliver peak bit rates of up to 1 Mbps and typical bit rates of 400kbps. These higher average and peak bit-rates are achieved through more advanced modulation, more efficient channel coding and an increased symbol rate. Round-trip latency is reduced to less than 80ms and spectrum efficiency is more than doubled. Latency and perceived delay are improved through reduced Transmission Time Interval (TTI) and additional protocol enhancements.
EDGE Evolution can be gradually introduced as software upgrades, taking advantage of the huge GSM installed base. The technology encompasses a number of enhancements that were included in Release 7 of the 3GPP standard.
Ericsson said it appears likely that existing GSM networks will remain in operation till 2020 and as such it makes business sense to continue to improve them.