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Lecture by Jan Markendahl: Dimensioning of mobile broadband and Intro to HW3

Tid: Fredag 2 december 2011 kl 10:00 - 12:00 2011-12-02T10:00:00 2011-12-02T12:00:00

Kungliga Tekniska högskolan
HT 2011 TCOMM

Plats: Ka-C21 (Isafjordsg 20-26 Trapph. C)

Aktivitet: Föreläsning

Studentgrupper: TCOMM2, TTLSM2

Info:

Dimensioning procedure for mobile broadband services including:
- differemt metrics for estimation of demand
- capabilities and cost of different types of technologies
- network deployment strategies and options
- cost structure modelling and analysis
- matching demand and supply

Introduction to home work assignement 3 

Description of Homework 3

HW 3 assignments and review groups are moved to the page
"student guide and course PM"
Jan Ingemar Markendahl ställde in händelsen 23 oktober 2011
Jan Ingemar Markendahl redigerade 1 december 2011

Dimensioning procedure for mobile broadband services including:- differemt metrics for estimation of demand- capabilities and cost of different types of technologies- network deployment strategies and options- cost structure modelling and analysis- matching demand and supplyIntroduction to home work assignement 3 

Description of Homework 3¶

HW 3 assignments and review groups¶

Jan Ingemar Markendahl redigerade 2 december 2011

Dimensioning procedure for mobile broadband services including:- differemt metrics for estimation of demand- capabilities and cost of different types of technologies- network deployment strategies and options- cost structure modelling and analysis- matching demand and supplyIntroduction to home work assignement 3 

Description of Homework 3

HW 3 assignments and review groups

kommenterade 2 december 2011

Hej Jan, i remember you mentioned that it would be more than 5 pages needed for HW3 report, then what is the expected maximum pages?

Anmäl missbruk
Lärare kommenterade 2 december 2011

hi

keep it less tha 10 pages

 

Jan

Anmäl missbruk
kommenterade 5 december 2011

Hi jan,

If I add more cells to the BS, would it also increase the coverage area, or it just increase the capacity?

For example, if the max cell range is 1km, so if I put more 5 cells in that site, (so the total would be 6 cells), would it also increase the coverage become 6 km? 

In my understanding now, only by installing new BS that would increase the coverage area, and adding more cells only increase capacity.  Please CMIIW, tack!

Anmäl missbruk
Lärare kommenterade 6 december 2011

Hi Laili, all

In our simple "cylinder model" the range is the same no matter you use:
one "omni" cell, 3 sector cells or 3 sectors with two carriers.

This means that the coverage is the same for a site with 6 cells (3 sectors*2 carriers)
as for the site with just one omni cell

You all need to be aware  when the system is coverge limited or capacity limited 

 Jan

Anmäl missbruk
kommenterade 6 december 2011

hi jan

I am a bit confused about penetration percentage. What is exactly mean!?

It means our population density will be more 2000 per square Km?

Anmäl missbruk
Lärare kommenterade 6 december 2011

 

Hi Amir,

The penetration is the percent of the population that "your" operator need to serve and hence this number is used for the dimensioning

The population density is 100 per square kilometer in rural and 2000 in urban,
the % number gives you the "user density" .

 

Jan

Anmäl missbruk
kommenterade 6 december 2011

Hi again

I have more questions

If we setup new site as micro cell inside the coverage area of the Macro cell then the load for macro cell will decrease? I mean can we exclude the number of user in the coverage area of micro cells from total user in Macro cell ?

And what is difference between the installation of site and build up the site?

BR

Amir

Anmäl missbruk
kommenterade 6 december 2011

Hej Jan, thank you for your answer. 

1. About the coverage again, the requirement clearly mentioned the coverage and capacity that has to be fullfilled each year. But, I found the case that i have fullfilled the capacity but not coverage, and vice versa, not both. What should I do with that?Shoudl I keep increase the CAPEX on that year until both fullfilled?

2. In corellate with Amir's 2nd question, in this HW, should we blend the 3 RATs in one calculation and find the maximum/the most suitable composition, which is the case in real world, OR we just calculate each RAT with different calculation and compare each other? In my understanding it's the second one. For example, calculate the deployment using EDGE only, then compare with example, UMTS Macro, HSDPA Micro, etc, depend on our task, OR blend EDGE solution with UMTS Macro and HSDPA Micro?

3. About Operation and Maintenance.

It's mentioned the OM is 10% from all CAPEX in that year, but in real case, the OM cost of last year (exp, year 0) will be the cost of current year as well (exp, year 1). When we sum out the total cost of the year, should we include the last year's OM to the current year' OM as well?

Tack!

Anmäl missbruk
Lärare kommenterade 6 december 2011

To Amir and Laili,

See below

BR /Jan

Amirs questions:
You should not mix any RAT´s, just compare the different options
"Build up" of the site is to deploy a new site
"Installation" is costs to install the equipment

Lailis questions
1)
you should satisfy reqiermenst in both coverege and capacity
2)
calculate each RAT with different calculation and compare each other
3)
O&M costs is 10% of all made investments, i.e. it is based on the assets of the operator

Anmäl missbruk
kommenterade 6 december 2011

Hi jan

You mean we cannot have multi technology in our solution, for example one cell with UMTS and the neighbor cell with HSPDA?

Anmäl missbruk
Lärare kommenterade 6 december 2011

Amir,

No, just sngle RAT deployment to compare

(You should not mix any RAT´s, just compare the different options)

/jan

 

Anmäl missbruk
Jan Ingemar Markendahl redigerade 6 december 2011

Dimensioning procedure for mobile broadband services including:- differemt metrics for estimation of demand- capabilities and cost of different types of technologies- network deployment strategies and options- cost structure modelling and analysis- matching demand and supplyIntroduction to home work assignement 3 

Description of Homework 3

HW 3 assignments and review groups¶

Jan Ingemar Markendahl redigerade 6 december 2011

Dimensioning procedure for mobile broadband services including:- differemt metrics for estimation of demand- capabilities and cost of different types of technologies- network deployment strategies and options- cost structure modelling and analysis- matching demand and supplyIntroduction to home work assignement 3 

Description of Homework 3

HW 3 assignments and review groups are moved to the page"student guide and course PM"¶

kommenterade 6 december 2011

hi jan

in the case that we want to find out the number of  available  sites (when we are incumbent) we should consider heterogeneous cell with the site in middle of it or one site with 3 sector that cover the 3 cells ?

Anmäl missbruk
kommenterade 7 december 2011

Hi Jan,

Thank you, i still have few questions regarding those answers"

1. You mention about the 5 % price erossion for all equipments price, but how about for "Installation and buildout" and "Running" costs? Should not it also decrease as well?

2. The price for "Site Lease", is it already including the "first cell at the site" as well or not?

3. For now i calculate the maximum traffic using the "Usage per user (GB/month)" table. Can you give some hint, how can the sentence of "The traffic is assumed to be concentrated to 4 hours per day" can be used into to the calculation?

4. What about 10% discount rate for NPV?I dont understand how to use this variable.

Tack

Anmäl missbruk
kommenterade 8 december 2011

Hey,

I want to comment on Laili's question about the sectors and the coverage. If we have one sector site, we will only have coverage in one direction but if we have 3 sectors, we will have coverage in 3 directions. Thus, it will increase the total coverage. Am I right?3 sectors vs 1 sector

Anmäl missbruk
kommenterade 8 december 2011

About laili's 3rd question: (the 4 hours per day) I think I know the answer: The capacity of the RATs is given in Mbps while the user demand is GB per month. There is one exercise in the notes which is similer to this.

Anmäl missbruk
kommenterade 8 december 2011

Hej Abdulla, thanks for responding my quesions, but some of that has been answered by Jan in the class, please CIIW:

Question 1: 5 % price erossion is applicable for all the prices, including "Installation and buildout" and "Running cost" 

Question 2: The amount of "Site Lease" suppose to be as same as the number of BTS we purchased, it just to get place/area to build those BTS. This price is not include "equipment" what so ever. 

Question 3: have been aswered by Jan, exactly the same with your answer.

Question 4: is not answered yet in the class, but I've got how to use it: to evaluate the investment / cash flow (Thanks to Jin).

The example of the calculation, such as: http://www.money-zine.com/Investing/Investing/Evaluating-Cash-Flow-Results/

Anmäl missbruk
kommenterade 8 december 2011

About the sector and coverage question, Jan mentioned that we can just use the original range, what so ever how many sector/cell we add (so adding the sectors/cells is just adding more capacity, not more coverage). It's just for simplicity of the calculation. please CMIIW

Anmäl missbruk
kommenterade 12 december 2011

Hej! One thing that confuses me is that the instructions say a site can only have 2 carriers with a maximum of 3 cells each. However, the UDGE Macro BTW says there are 3 TDMA carriers from the start. Have I missed something? Can EDGE have extra carriers?

Anmäl missbruk
Lärare kommenterade 12 december 2011

 

Hej Mikael,

Yes, the EDGE description is confusing (unintentionally).
The three 3 TDMA carriers (3*200 kHz) with the capacity 0,7 Mbps can be used as the basic builing block. You can have these 0,7 Mbps in 3 sectors, i.e. 2.1 Mbps per site.

Assume that the maximum configuration 2*0,7 Mbps in each of three sectors, 
i.e. the max  site capacity is 3 * 2*0,7 Mbps.

 

Jan

 

Anmäl missbruk
kommenterade 12 december 2011

So when building an EDGE site from scratch, each of the 3 carriers can only have 2 sectors each meaning the maximum number of cells (sectors) in a site is still 6?

Anmäl missbruk
kommenterade 12 december 2011

Also, will an added sector mean _1_ new sector in _1_ of the carriers of a site, or will _all_ carriers in a site receive _1_ extra sector?

Anmäl missbruk
Lärare kommenterade 12 december 2011

No,

As I  said, this may be confusing-

The three 3 TDMA carriers (3*200 kHz) with the capacity 0,7 Mbps is a basic building block,
i..e . can be seen as a "carrier group".

Assume that the maximum configuration 2 carrier groups of 0,7 Mbps in each of three sectors, 
i.e. the max  site capacity is 3 * 2*0,7 Mbps.

Anmäl missbruk
Schemahandläggare ställde in händelsen 23 mars 2012

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Senast ändrad 2012-03-23 11:36

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