UMTS Capacity Planning

To figure out the WCDMA network, we have to associate the several information. As WCDMA blockage can occur at several part also the multiple-service will consume different resource in the network. Furthermore the congestion in WCDMA is consisting of soft and hard blocking.To avoid the congestion and blockage of the service, we have to monitor the following resources 

OVSF (Channelization Code) Allocation

Users data is modulated by a channelization code. The orthogonality properties of OVSF enable the UE to recover its bits without being interfered by other users.  This is true only if the system is synchronous, which is the case in downlink, but not in uplink. Thus, the OVSF codes are not used to separate users in uplink and therefore different users can use the same code. But they can be used to distinguish the different physical channels of one user.
Channelization code is defined as Cch SF, k,, where, SF is the spreading factor of the code, and k is the sequence of code, 0≤k≤SF-1. Each level definition length of code tree is SF channelization code, and the left most value of each spreading code character is corresponding to the chip which is transmitted earliest.      SF = chip rate / symbol rate     so, high data rates = low SF code, and low data rates = high SF code.

Channel Element (CE) Resource

CE resources are a type of NodeB hardware resource. The number of CEs supported by single NodeB indicates the channel demodulation capabilities resource of the NodeB. The more CEs a NodeB supports, the more powerful the channel demodulation and service processing capabilities for serving the customers. Services at different rates require different numbers of CEs to ensure proper channel demodulation.

In a RAN, CE resources are managed by both the RNC and NodeB. The NodeB reports its CE capacity to the RNC. The RNC determines whether to admit a new service based on the number of CEs that need to be consumed and controls CE resources during CE congestion.

OpenSignal: GSM WCDMA LTE WI-FI - 2G 3G 4G (Cell Coverage) Signal Maps

Here at telecomHall, as you already know, we share tips and interesting suggestions geared to the technical audience, people who works with Telecom and IT. But today we are going to talk about a very interesting application, but that doesn't only apply to these professionals, but to everyone that use wireless devices.
Introducing OpenSignal, an application that performs Cellular and Wi-Fi Networks data collection, and use it in building a comprehensive public map with information for all these networks around the World.

And gets it through a technique that should be increasingly exploited in other applications: the collaboration of all users, with beneficial results to all.

Then, let's go to see the application?

• What is 3GPP?

The 3rd Generation Partnership Project (3GPP) is a collaboration between groups of telecommunication associations, to make a globally applicable third generation 3G mobile phone system specification within the scope of the International Mobile Telecommunication-2000 project of the International Telecommunication Union (ITU). 3GPP specifications are based on evolved Global Systel for Mobile Communication (GSM) specifications.

3GPP standardization encompasses Radio, Core Network and Service architecture.

The groups are the European Telecommunications Standarts Institute, Association of Radio Industries and Businesses/Telecommunication Technology Committee (ARIB/TTC) (Japan), Alliance for Telecommunications

Industry Solutions (North America) and (South Korea). The project was established in December 1998.

3GPP should not be confused with 3rd Generation Partnership Project 2 (3GGP2), which specifies standards for another 3G technology based on IS-95 (CDMA), commonly known as CDMA2000.

The 3GPP has specified the following standards:

• GSM
• GPRS
• GERAN
• WCDMA
• HSPA (HSDPA and HSUPA)

3GPP2 was born out of the International Telecommunication Union’s (ITU) International Mobile Telecommunications “IMT-2000” initiative, covering high speed, broadband, and Internet Protocol (IP)-based

mobile systems featuring:

• network-to-network interconnection,
• feature/service transparency,
• global roaming,
• seamless services independent of location.

IMT-2000 is intended to bring high-quality mobile multimedia telecommunications to a worldwide mass market by achieving the goals of increasing the speed and ease of wireless communications, responding to the

problems faced by the increased demand to pass data via telecommunications, and providing “anytime, anywhere” services.

Source:www.teletopix.org