CARRIER AGGREGATION

The majority of Operators started LTE Networks on a single frequency band at a given area like 1800 MHz and 700 MHz and due to the capacity requirements and carrier aggregation data rates, Operators have added other LTE frequency like LTE 2600 MHz as an example and therefore more frequencies being used for LTE networks. The reasons are fixed capacity of each band, Interference between Operators and towers.

Going forward, the Carrier aggregation will be the main solution for simplifying multiband traffic management resource sharing between the LTE networks with current already deployed networks like 2G and 3G. Sharing of resources will also be of concern by operators as the deployment of LTE continues since LTE Network will have a combination of new carrier aggregation devices and non-carrier aggregation devices.

Technically, it is possible to use a single band and if left to service providers they will prefer deploying a low frequency as possible considering the good propagation in the low frequency is much better compared to high frequency bands but this is not always the case as they have to follow the Government regulation rules regarding frequency assignment.

Therefore LTE1800 and LTE2600 are used in city based scenario with a lot of buildings and obstructions as they travel shorter distance. LTE800 is therefore used in rural areas where a single Base station can cover a wider area.

Currently, Operators are using LTE1800 and LTE2600 for IBS/DAS sites.

Why do we need different LTE band 1 (2100), 2 (1900), 3 (1800), 4 (1700/2100), 5(850), 7 (2600), 8(900), 17(700), 20(800) - N910F, N910C?is it possible to keep single band only?

There are three main reasons:

1) Fixed capacity of each band. Each band has a maximum amount of data it can carry shared between all users connected in a certain area. So to allow more people to connect you need to have more bands active.

2) Interference between operators. If two or more operators used the same band then there would be interference between the handsets and cell towers. So it is necessary that each operator is assigned a different band to ensure interference doesn't occur.

3) Interference between towers. If two or more towers use the same band there

would be interference. So by having multiple bands assigned, an operator can spread out the towers and the frequencies used to minimise .interference. Furthermore with careful frequency planning you can increase the number of customers who can use your service at the same location.

Technically yes, it is possible top use a single band. And if left to the service providers they would always prefer as low a frequency as possible (e.g. 450 MHz) since the propagation is much better. 

That said there are two limitations:1. These are licensed spectrums, so service providers don't always have a choice since they need to purchase a license from a government to be able to use a specific spectrum. 2. Radio frequency bands are still finite in capacity, so even though there has been a great increase in capacity, i.e. bandwidth) from the days of analog (1G) to LTE (4G) it still is a shared resource. Yes you can design more optimal overlay architectures with macro/micro/nano/pico cells, etc. but I think you get the point.

Diff of LTE 800 lte 1800 and 2600

LTE1800 and LTE2600 are particularly used in city-based scenario with a lot of buildings and obstructions as they travel shorter distance.

LTE800 is used in rural settings where a single BS can cover a wide are.

NOKIA SOLUTIONS END CUSTOMER OOREDOO QATAR 

New 2G/3G Rollout 70 sites (Roof top + Green field) 

 

Installation of Telecom Works:

 

Site Survey Installation of Antennas, Feeder Cables, Connectors and other GSM Ancillaries

Internal and External Works which include Installation and commissioning of Base stations, Antennas, Feeder Cables, Cable Trays, BTS, Rectifiers and Battery BanksEquipment FSME, FRGF, FRGP, FSMD, ESME , Multi radioInstallation of Power Systems and Battery BanksIntegration of G900 / U900 / DCS1800 / U2100

U900 phase 1, 2, 3 250 sites (Roof top + Green field)Telecom Works Site Survey Swapping of single port antennas to multi port  AntennasInternal and External Works which include Installation and commissioning of Base stations, Antennas, Feeder Cables, Cable Trays, BTS, Rectifiers and Battery BanksInstallation of Power Systems and Battery BanksCombining the existing network to different solution to integrate U900 TRX downgrade 125 sites (Roof top + Green field) Site Survey Downgrading the TRX configurations of GSM and DCS Reconfiguration and commissioning as per new RF data LTE 800 and 2600 MHZ 55 sites (Roof top + Green field + Cow Sites) Site Survey Swapping of antennas to multi port  AntennasInternal and External Works which include Installation and commissioning of Base stations, Antennas, Feeder Cables, Cable Trays, BTS/Node B , eNode B, Rectifiers and Battery BanksInstallation of Power Systems and Battery BanksCombining the existing network to different solution to integrate LTE 800 and 2600PIM testing of new and existing jumper and feeder cables /connectors

Nokia Flexi packet MW project 95 sites (Green field and COW sites) Site Survey Dismantling the existing antenna Hot swap and cold swapInstallation , commissioning and alignment Link configuration 1+0, XPIC, 1+1 SDBER and Ethernet testing Traffic shifting    

Job Description

Tasks:

Support of site surveys Onsite trouble shooting/support Support at cfg-creation Telephone support of integrations

Requirements:

Knowledge in: BBU3900 Base Stations Boards (UMPT/WMPT)

Experience of working on LTE upgrade project Able to work at heights

Installation, commissioning and Integration of RBS6000 (2G/3G/LTE) sites with DUG, DUW and DUL, RBS format, 3rd carrier implementation with 2 DUW etc.Installation, Commissioning and Integration of RBS2000 series using OMT Software for 900 MHz/1800 MHzInstallation and commissioning of RBS 3000 seriesInstallation, alignment and commissioning of Microwave equipment (Marconi MDRS155EC, Mini Link LH, Mini Link TN etc.)On site troubleshooting and supportInstallation of power systems and battery banks, Antenna, feeder lines and connectors for GSM sites

Installation, Commissioning and integration of Flexi EDGE 2G BTS,Installation, Commissioning and integration of Flexi WCDMA 3G BTS/NodeBInstallation, Commissioning and Integration of Flexi Multiradio 2G BTSSynchronization of Flexi EDGE 2G BTS to Flexi WCDMA 3G NodeB.Reconfiguration and commissioning as per new RF data, TRX upgrade and sector addition activitiesInstallation of GSM Antenna, feeder cables and connectors for 2G sitesInstallation and Commissioning of Flexi Hybrid (SRA4HC) and Flexi Packet Multiradio links (800H) Microwave equipment, link configuration for 1+0, 1+1, XPIC & SD and routing.Flexi LTE eNodeB trial projects.Integration of 2G, 3G and LTE sites using appropriate BTS Site Manager.Knowledge in Commissioning and Integration of WCDMA-LTE RF sharing mode