LTE: A look at the technology and its feasibility in a mature 2G market like India
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The LTE India 2010 International Conference was held to bring together telecom players from across India and the world along with the Indian media, to discuss all things related to LTE (Long Term Evolution) and its feasible implementation in India.
Adrian Scrace, Head of the Mobile Competence Centre at 3rd Generation Partner Project, a company that standardizes various mobile wireless technologies, had much to say about the future of Indian mobile telecom. Referring to the just concluded 3G auctions, Mr. Scrace said that “India has taken [the] vital step” towards the “future evolution of our current technology”. He also emphasized that there was no need to question if India should be switching to LTE, but only when. Kicking off the conference, he asked some important questions right at the start, like: “Straight to LTE or develop WCDMA?”, “WiMax or LTE?”, and which sort of LTE, “TDD of FDD?”.
Commenting on the similarities between India and China, such as the large mobile user base, he also pointed out the main difference, the proliferation of GSM systems in India, as opposed to the CDMA systems of China. He also said that “GSM has served India well”, and that LTE was a natural evolution along those lines, and therefore a natural evolution for India.
LTE, or Long Term Evolution, is 3rd Generation Partner Project’s (3GPP) standardized ‘3.9G’ mobile wireless technology, which nearly meets the IMT (International Mobile Telecommunications) Advanced requirements that define what 4G should be able to offer.
LTE is categorized as 3GPP Release 8, an advanced form of UMTS (Universal Mobile Telecommunications System) which was the first 3G technology that evolved from GSM foundations, and launched in 2002 in Europe.
When we say that LTE almost meets the IMT Advanced requirements for 4G, we mean it nearly offers the high-quality mobile services expected of 4G (and the 4G candidate – LTE Advanced – or 3GPP Release 10) which are:
- Data transfer rates of 100 Mbps for high and 1 Gbps for low mobility
- Downlink peak spectral efficiency of 15 bits/Hz, Uplink peak spectral efficiency of 6.75 bits/Hz
- Control plane latency of 100ms, user plane of less than 10ms
- Multiple mobility classes for various environments
- Low handover interruption time (27.5ms intra-frequency, 40ms inter-frequency within a spectrum band, and 60ms between spectrum bands)
- Average (between environments) VoIP Capacity of 40 active users/sector/MHz
- System architecture evolution that with its flat-IP architecture will allow for compatibility of services within IMT and with fixed networks, as well as interoperability with other radio access systems.
- Worldwide roaming capability
3.9G LTE will offer downlink peak rates of at least 100 Mbps (at 20MHz), an uplink of at least 50 Mbps, user plane latency of less than 10ms, support for both frequency division duplexing (FDD) and time division duplexing (TDD), and a flat IP-based network architecture (System Architecture Evolution) that will support and mobility between most legacy and non-3GPP systems, such as GPRS and WiMax respectively.
Read on to know more about LTE, its advantages (specially for the Indian environment), and the expectations it gives rise to...
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