Posted: September 12, 2013

Huawei today announced it had helped build the world’s first 3.5GHz LTE-A trial network in Japan. A recent demonstration of the network showed it could support a max 770 Mb/s download speed by making use of cutting-edge LTE-A technologies like Carrier Aggregation (CA), Coordinated Multi-Point (CoMP) and Cloud BB (Baseband).

The demonstration was held in late August and was hosted by the Global TD-LTE Initiative (GTI) during an ad hoc seminar discussing the latest developments in the LTE TDD 3.5GHz industry (for seminar details see: Issues discussed at the seminar included speeding up the release of 3.5GHz spectrum and adopting the same technologies to share the same ecosystem.

The demonstration was conducted by Japanese mobile operator SoftBank, and was held in Tokyo’s densely urban Ginza district. Attendees included representatives from operators China Mobile, SoftBank, UK Broadband, representatives from the WiMAX Forum, as well as chipset companies.

A pre-commercial network-level performance evaluation conducted during the demo determined the network could provide a top user experience in Tokyo’s densely populated Ginza district. It was during this evaluation that advanced LTE-A technologies for the 3.5GHz band were demonstrated.

The LTE-A technologies demonstration showed Huawei’s equipment can provide a max 770 Mb/s download speed and an average 500 Mb/s download speed over multiple network sites. Afterwards attendees commented positively on the reliability and stability of LTE TDD technologies on the 3.5GHz band, and noted their effectiveness for solving weak coverage issues and co-frequency band interference.

SoftBank also demonstrated a “five-carrier CA” technology for LTE TDD on the 3.5GHz band using a prototype system that can provide a max 1.2 Gb/s download speed when run on Huawei’s Ultra-wideband RRU (Remote Radio Unit). When deployed, a combination of Ultra-wideband RRUs can support more than 100MHz instantaneous bandwidth and can be customized on-demand to accommodate new spectrum as it becomes available.

The building of the LTE-A 3.5GHz trial network and recent successful network demonstration represent milestones in the continuing development and maturation of LTE TDD solutions for the 3.5GHz band.

By 2015 in Japan, further spectrum from 3.4 to 3.6GHz is expected be allocated for introducing commercial 4G networks. Worldwide, more 3.5GHz spectrum is expected to be released to promote development of mobile broadband services using high spectrum bands.

Post a Comment

Comments are closed