Huawei released its next generation SingleDAS (distributed antenna system) indoor coverage solution, along with the industry’s first plug and play remote electrical tilt (RET) antenna at the 2013 Mobile World Congress.
SingleDAS antenna system
Huawei said that SingleDAS is suitable for multiple operator and multiple vendor deployments to help rapidly deploy indoor networks and provide users with the best indoor service experience.
Providing top-quality indoor mobile broadband coverage has become vitally important amid the rapid development of mobile broadband (MBB) networks. User demand for better indoor coverage has grown even as deployment costs for indoor sites have become more prohibitive. Traditional indoor coverage solutions are unable to meet expanding MBB requirements for deployments requiring multiple operators and multiple vendors, according to Huawei.
SingleDAS solves these problems by providing flexible and high-performance indoor deployments supporting scalable capacity expansions and a smooth evolution with a unified management system.
SingleDAS saves network TCO by providing one set of equipment that supports full bandwidth and high output power for multi-operator and multi-vendor access. This means the solution provides site sharing and can receive signals from existing outdoor sites, eliminating the need to build additional equipment rooms while making network deployment faster.
With SingleDAS, operators are provided with numerous immediate economic and deployment benefits. Site repeater reliability is effectively doubled to ensure long-term network stability, and signal noise is reduced by 50% to enhance cell edge throughput.
2T2R MIMO support enhances network capacity and saves power consumption by up to 40%, and capacity expansion is made possible with software upgrades alone. SingleDAS also supports multiple network modes, helping realize smooth LTE refarming, utilizing existing operator assets.
Huawei added that SingleDAS's unified management system provides a comprehensive network operation platform that improves O&M efficiency for both SingleDAS and outdoor macro networks.
Plug and play EasyRET antenna solution
Huawei also used MWC 2013 to release what it claimed is the industry's first ‘plug-and-play’ EasyRET (Easy Remote Electrical Tilt) antenna solution. Designed to resolve issues of traditional RET antenna (RET component space limitations, multiple connection point requirements, uncertain reliability, manual configuration and physical maintenance challenges), Huawei argues that EasyRET represents strong ROI as a currently relevant investment with long term viability.
In today's world of MBB with the coexistence of GSM/UMTS/ CDMA/LTE and other networks, for ease of operation and decreased risk of multi-connector failure, remote electrical tilt must replace the more restricted traditional electrical tilt antenna.
Looking at the current challenges in greater detail, traditional RET antenna requires multiple electrical tilt components, including Remote Control Unit (RCU) and daisy chain cables; multiple band antenna with Antenna Line Device (ALD) systems require added connectors, all within limited antenna width and limited installation space.
All these added components and connector points also inevitably compound the risks and chances of increasing engineering fault points, Huawei argues. In addition to this, due to external factors, when the RCU repeatedly adjusts the downtilt, there is a risk of shifting to the incorrect downtilt. There is also a risk to the long term stability and reliability of components that are placed outside and exposed to harsh environments.
Increasing reliability and reducing operation and maintenance (O&M) costs has therefore become two of the most pressing problems faced by operators around the world. By protecting antenna and cable systems and enhancing installation and maintenance efficiency, Huawei's EasyRET provides a significant contribution to relieving these concerns.
Huawei's EasyRET antenna solution integrates multiple band antennas and traditional RET components, reducing the amount of cable and external connectors. Electrical tilt components and the antenna are strictly matched and all related configuration data is preloaded and calibrated before any EasyRET antenna solution is delivered.
After an EasyRET antenna is powered on, Huawei's use of electronic tags allow the antenna to automatically report the RCU bar code to the O&M Center (OMC) where it is automatically saved and matched to the EasyRET antenna port and frequency band. If a frequency band needs to be adjusted, an RCU bar code can now be queried directly from the OMC , reducing manual recording of RCU bar codes and preventing adjustment errors caused by incorrect RCU bar codes.
According to Huawei, rigorous testing has shown that the EasyRET RCU self-lock torque and gearbox ensures vibration will not change antenna downtilt, reducing chances of change due to antenna signal handoff.