Sunday, November 15, 2015

ZTE Makes Progess in D-MIMO Technology

ZTE announced a breakthrough in its development of D-MIMO (distributed multiple input and multiple output) technology, which promises up to a 9X increase in wireless network performance at the cell edge.

In mobile networks with many base stations, interference can cause degraded signaling at the cell edge, affecting user experience. D-MIMO technology can effectively improve the data rate at the cell edge through coordinated transmission among base stations, resolving a major challenge facing operators.

ZTE said a recent outdoor field test conducted jointly with a partner used D-MIMO technology based on ZTE’s proprietary Cloud Radio solution.  The testing covered single-user and multiple-user scenarios in an environment with multiple overlapping base stations, and used commercially-available mobile device terminals.

The Coherent-Joint Transmission technology used in ZTE’s new D-MIMO system ensures full phase synchronization among base stations, so that the jointly transmitted signal is amplified to the maximum level as it arrives at the antenna of a user terminal, minimizing interference with other terminals. Compared with the legacy Non-Coherent-JT technology, Coherent-JT provides 3 dB of additional gain at the antenna of a target user terminal and forms null steering at the antennas of other user terminals to minimize signal interference, achieving multi-user joint transmission (MU-JT).

The indoor D-MIMO test result shows that the MU-JT technology can form null steering toward multiple users to guarantee good multi-user joint transmission in an enclosed and small space. The service data rate of a single testing cell has been at least quadrupled in an ideal non-interference situation, and a number of testing cells have enhanced their resistance to interference by more than a hundred times.

http://wwwen.zte.com.cn/en/press_center/news/201511/t20151112_445840.html


IHS: Sales Increasing for SDN

Data center and enterprise LAN software-defined networking (SDN) deployments began to ramp in the first half of 2015 (1H15), according to a new report from IHS .

IHS forecasts the market for ‘in-use’ SDN Ethernet switches and controllers to top $1.4 billion this year, nearly doubling from last year.


Some highlights:

  • In the first half of 2015 (1H15), bare metal switches accounted for 45 percent of global in-use SDN-capable Ethernet switch revenue
  • White box switch vendors, as a group, are #1 in bare metal switch revenue
  • Dell owns 100 percent of branded bare metal switch revenue
  • HP has the largest share of SDN-capable (in-use and not-in-use) branded Ethernet switch ports
  • In-use virtual switch (vSwitch) ports are expected to make up 11 percent of SDN (in-use and not-in-use) ports shipped by the end of 2015
  • SDN in-use physical Ethernet switches are forecast by IHS to comprise 15 percent of Ethernet switch market revenue in 2017, up from 4 percent today

“New SDN use cases continue to emerge, and the first half of 2015 was no exception with the establishment of the software-defined enterprise WAN (SD-WAN) market. The SD-WAN market is still small, but many startups and traditional WAN optimization appliance vendors and network vendors have jumped in,” said Cliff Grossner, Ph.D., research director for data center, cloud and SDN at IHS.

http://www.infonetics.com/pr/2015/1H15-Data-Center-Enterprise-SDN-Market.asp

See also