Solution Precision network planning for green mobile networks
Precision network planning
for green mobile networks Precision mobile network planning helps operators optimally allocate network resources, reduce power consumption, enhance network performance, and build efcient, eco-friendly mobile networks. By Yang Bo unnecessary sites, curtail site survey costs, and reduce power consumption.
Two complementary clouds
Precision planning and coverage on demand
R
adio network planning usually employs 3D digital maps to identiy land use proiles, ranging rom densely-populated urban and actories to open land and rural area. However, a limited accuracy o around 20m coupled with map makers’ patchy knowledge o local terrain tends to cause errors, such as clutter and size. Huawei has solved these problems with its Visual Aid Planning system, integrating highly accurate 5m resolution satellite
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images and visual environments, such as Google Earth Pro, with the Huawei network planning sotware, GENEX U-Net. he solution’s output can be displayed on traditional digital maps in a visual environment setting, vastly increasing coverage prediction accuracy. Combined with Huawei’s Smart Cell Planning module, the system dynamically adjusts cells’ azimuths and downtilt in line with clutter deinition and provides recommendation or transmission power and network installation. he Visual Aid Planning method precisely identies the network coverage area and target, which helps operators eliminate
Broadband networks have to meet the high-speed data service requirements o specic user groups as well as the general requirements o subscribers. For example, greater network resources are demanded in top-grade oice buildings, high-class residential areas, large shopping centers, airports, galleries, and coee shops. As conventional macro-cell networks are ailing to cater to high use areas, Huawei has proposed the “wo Clouds” concept, comprising the continuous cloud and the high speed cloud. he continuous cloud targets average user groups and aims to meet their data service requirements through the wide coverage capabilities o high power distributed BSs or macro BSs. he high speed cloud is designed to meet higher level usage and is typically deployed in densely-populated urban areas and comprises low power micro BSs, such as Pico, ePico, and Home AP, that cover narrower areas, he two clouds complement each other by combining low and high power BSs, which signicantly reduces network power consumption and greatly improves throughput perception and network coverage quality.
Huawei Communicate
Optimized network resource allocation
Power sharing Statistics show that the power used by radio-requency (RF) elements accounts or around 40% o the total power consumption in a site. Multi-Carrier Power Allocation/Power Sharing (MCPA) technology can improve coverage by 8% to 20%, with a given static output power rom the power amplier. he ollowing table shows the power and coverage improvements in cells (S3 and S4) each with one multi-RF unit (MRFU) when MCPA is deployed.
he Huawei SingleRAN CoRNP&RNO (Radio Network Planning and Radio Network Optimization) solution uses a uniied tool platorm to collaboratively plan and optimize multiple networks, such as GSM and UMS. he solution optimally allocates network resources and requires just one team. Collaborative coverage planning provides an area-speciic coverage mode to achieve seamless network coverage with Self-organizing Network adjacent networks, save site resources, and avoid wasted additional investment. he Sel-organizing Network (SON) Collaborative capacity planning tailors solution curtails OPEX, the CAPEX service strategies to diferent user groups, incurred by network planning and w h i c h e i c i e n t l y u t i l i z e s n e t w o r k optimization, and the carbon ootprint o resources and maximizes network capacity. networks. Huawei has allocated considerable Collaborative quality planning optimizes resources to SON development and has network parameters to promote interalready commercially launched its solution. system cooperation, improve network SON mainly provides the ollowing KPIs, and boost user experience. eatures: Te solution incorporates an analytical Aut o Nei g hb or Re l ati on (A NR ): platorm that serves to assess status Au to mat ica lly dis cov ers ne igh bo rin g and then optimize the perormance cells to minimize missed cells, maximize o multiple networks. Collaborative handover success, and reduce the time Radio Resource Management (Colocating neighboring cells and the power RRM) eectively identiies ineicient consumption o mobile phones. resource use and balances trac to avoid Mobility Robust Optimization (MRO): congestion. Collaborative intererence Reduces abnormal handovers by balancing analysis can analyze and thus reduce premature and delayed handovers. he network intererence to avoid issues such MRO orward or reverse adjusts the Cell as excessive power transmission o wireless Individual Oset (CIO) in line with the network and increased power consumption delayed/premature handover ratio, and can by mobile phones. also adjust the A2 threshold in an intersystem environment. Mobility Load Balancing (MLB): Reducing power use with Negotiates with neighboring cells and modiies relevant mobility parameters to multiple technologies Table 1 BTS power and coverage improved by MCPA TRXs
3
4
Static Set-top Power
27W / 44.3dBm
20W / 43dBm
Dynamic Shared Set-top Power
31W / 44.9dBm
27W / 44.3dBm
Power Increase
0.6dB
1.3dB
Coverage Radius Increase
About 4%
About 9%
Coverage Area Increase
About 8%
About 18%
transer excessive UEs rom an overloaded cell to low-load cells based on a specied load limit. Doing so reduces the access rejection rate and increases system capacity. Intererence Control and Intererence Coordination (ICIC): Coordinates diferent edge bands between neighboring cells to reduce inter-cell intererence. ICIC raises the throughput o cell-edge UEs by up to 20%, thus improving user experience.
Intelligent Combiner Bypass Intelligent Combiner Bypass technology can reduce power consumption by about 30% in low trac cases. For heavy trac, hal the power (3dB) in a double-density module is lost ater a combiner subsumes two carriers. he Intelligent Combiner Bypass conigures one carrier to support trac when trac is low. Power Booster technology congures a double-density module–such as DRU, DRFU, and DRRU–as a single-carrier module. Ater modulation and digitalto-analogue (DA) conversion, RF signals enter the power amplier by two outputs, and are then combined. his kind o combiner ampliies double signal power as the phases o the two signal outputs are ully aligned. In this way, Intelligent Combiner Bypass technology signicantly reduces the power used by BSs whilst keeping the same transmission power.
Distributed BTS he Distributed Base Station system innovated by Huawei allows RRUs to be mounted close to antennas, which nearly doubles antenna output power and signiicantly increases network coverage. Te number o BSs required is reduced by around 30% and power consumption is cut by between 30% and 40%. In addition, distributed BSs do not require an equipment room, which realizes a zero ootprint, and reduces the requirements on eeders and tower mounted ampliers. In 2007, Vodaone reported that its legacy BS in Spain consumed around 925W to yield 20W to antennas. he new Huawei BSs use just 480W to produce 40W at the top o cabinet, meaning that each BS annually saves an average o 3.9MWh. Editor: Liu Zhonglin
[email protected]
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