Capacity Calculation v8 2017-02-27

Capacity Calculations in iBwave Design v8 Published: 2017-02-27

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Contents Ab st rac t ..................... ... .................. .................. .................. .................. .................. .................. ................... .................. ... 2 1. Traff ic (# of cl ien ts ) .......... ................... .................. .................. .................. .................. .................. .................. .................. .................. .................. .................. .................. .................. ........... .. 3 2. Target th ro ug hp ut ................. .......................... .................. .................. .................. .................. .................. .................. .................. .................. .................. .................. .................. ............... ...... 5 3. Cell load ................................................................................................................................................... 7 5. Aver age data rat e per cl ient .................. ........................... .................. .................. .................. ................. ................. .................. .................. .................. .................. ............... ...... 10 6. Eq ui pm ent li mi t (# o f cl ient s) ................. .......................... .................. .................. .................. .................. .................. .................. .................. .................. .................. ............. .... 11 7. Capaci ty leg end ................. .......................... .................. .................. .................. .................. .................. .................. .................. .................. .................. .................. .................. ................ ....... 12 CONTACTING CUSTOMER CARE ........................................................................................................... 13


Abstract

Abs Ab s tr act In this tech note we will exp lore the principle of capacity calculatio ns and what the results represent in iBwave Design. Let’s consider following example of two sectors in a floor plan.


1. Traffic (# of clients)

1. Tra Traffi ffi c (# of cli ents) Distribution of users served by a sector is based on best serving area. Of all users on this floor plan served by 1900 PCS LTE, 40.4% of users will be served by sector 1 and remaining by sector 2.

There are total of 50 users on this floor plan.

Since there is only 1900 PCS LTE wireless service, all 50 users will be using this wireless service.


1. Traffic (# of clients)

So, Sector 1 will serve = 50 * (100/100)* (40.4/100)= 20.2 users and, Sector 2 will serve = 50 * (10/100) * (59.6/100) = 29.8 u sers.


2. Target throughput

2. Target throughput Usage profile determines the target throughput. Usage profile is selected a t:

This usage profile can be modified at:

Each user is required to use average throughput rate of 3.45kbps for office environment.


2. Target throughput


3. Cell load

3. Cell load

This cell load can be set at:


3. Cell load

Cell load limit in this example is 50%.

Cell load is calculated at target throughput. In our example, the target throughput is 3.45 k bps. Users are spread across Maximum achievable data rate (MADR) levels according to MADR distribution coverage. As had been seen earlier, the best server region of sector 2 is depicted by red boundary. On this this floor, within the best serving region of sector 2, 8.4 Mbps of MADR can be achieved in violet region which covers d% of the area. Other MADR levels and the ir % coverage are shown for Sector 2 in the below image.

As we had seen earlier, sector 2 supports 29.8 users. iBwave Proprietary – do not distribute 8

3. Cell load

Number of users in each MADR region is spre ad as: 29.8 *a%, 29.8 *b %, 2 9.8 *c%, 29.8 * d%. On this floor, Cell load for sector 2 is calculated as: (3.45 kbps/MADR of Region a)*(29.8 * a%) + (3.45 kbps/MADR of Region b)*(29.8 * b%) + (3.45 kbps/MADR of Region c)*(29.8 * c%) + (3.45 kbps/MADR of Region d)*(29.8 * d%) The result is 6.35, since it’s hard to manually calculate the %coverage of each MADR level of sector 2 in this example, variables have been used. If this is tested with an example of one sector, it will be easier to validate the result.


4. Average data rate per client

4. Average Average data rate per cli ent Average data rate supported at cell load limit. In our example, this this is found by increasing the value of 3.45 kbps until we reach the cell load limit of 50%.


5. Equipment limit (# of clients)

5. Equipment Equipment l imit (# of c lients) Maximum number of users supported by Radio transceivers (small cel ls/base stations/remote radio heads/Access points) can be defined in the field “Equipment Limit (# clients)” as seen below.

If the equipment limit (# clients) = 0, it means, there is no l imit.


6. Capacity legend

6. Capacity Capacity l ege egend nd

If equipment limit (# clients) that can b e supported by a radio transceiver is greater than the number of users required to be supported by the ra dio transceiver, capacity will fail due to equipment. In the above example, 29.8 users are required to be supported by sector 2 but since equipment limit is zero, this validation is not d one. However, if the equipment limit(# clients) was 25, c apacity would have failed due to equipment. If cell load is greater than cell load limit, capacity fa ils due to air in terface. In our example, target throughput of 3.45 kbps is achieved with a cell load of 6.35% which is lower than the cell load limit of 50% and hence, the capacity passes. It shows there is a room to accommodate more users or higher average data rate per user.


CONTACTING CUSTOMER CARE

CONTACTING CUSTOMER CARE If you encounter any problems using iBwave Design, or if you have any questions, please send your inquiries to Customer Care: Email: [email protected] Phone: 1 514 397-0606, extension 610

You can also: Log into the iBwave Customer Portal, and create a re quest in the My Cases section: http://www.ibwave.com/language/en-US/MyiBwave.aspx Base section of the iBwave Check if your questions have been answered in the Know ledge Base Customer Portal


CONTACTING CUSTOMER CARE


Capacity Calculation v8 2017-02-27

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