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Indo or Des ign for the Aurassi Hotel
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Title: Version: Date: Author: Summary:
Indoor Design For The Aurassi Hotel V1.1 August 2004 Sabrina MANSOURA & Hatem MOKHTARI This document shows the adopted solution for indoor design of the Aurassi main locations where the Wataniya events (22nd and 24th August 2004) will be held. Unfortunately no measurements are available when the pico-cells are on air because of lack of time due to a fast deployment and very tight timetable imposed by the Aurassi Management.
4.1. TRU REQUIRMENTS .....................................................................................................6 4.2. FREQUENCY PLANNING ISSUES .....................................................................................7
1. INTRODUCTION For the launch event of the 22 and the 24 of August in the Aurassi Hotel, Wataniya Télécom must seek a temporary solution to suit and to guaranty a good quality of the coverage needs for the Outdoor and for the indoor user. For the Outdoor coverage, we have proposed to put 2 Ericsson RBS on the roof top of the hotel; each one contains 2 sectors with a capacity of 2TRU per sector. The indoor solution for the Aurassi is detailed in this document. This document is organized as follows: Section 2 contains the drawings of the location that are reserved to Wataniya events and section 3 summarizes the indoor measurements of the signal level, while Section 3 include the proposed Indoor design.
2. Drawing The event on the 22th is organized in the conference room and the restaurant of the floor “e” whereas of the 24th will be in the night club of the level “B”.
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C 17
16
5
18
6
7
A 13
14 15
10
2
3
8
4
B 12
11 1
9
0
Floor « E »
D
21
19 20
23 22
Floor « B »
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24
E
25
3. SIGNAL LEVEL MEASUREMENTS The results of the signal level measurements in the two floors “E” and “B” are as follows:
Position
0
1
2
3
4
5
6
7
RxLevel (dbm)
-104
-90
-90
-86
-82
-88
-91
-76
Cell ID
Al16262b
Al16262b
Al16262b
Position RxLevel (dbm) Cell ID Position RxLevel (dbm) Cell ID
We expect a number of Wataniya personnel of about 400 people. If we assume that the expected traffic intensity will be 30 mErlang/user and only 100 SIM will be used, the total traffic requirements will be around 3 Erlang. Making use of Erlang B Law leads to a capacity of 2 TRUs maximum indoors.
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Al49362b 15 -85 Al49362b 23 -87 Al16041a
4.2.
Frequency Planning Issues
As we use only 2 TRUs, the first TRU will handle the BCCH and 7 TCH and second one the TCH channels only. In terms of frequency assignment, we should stick to the same rule as proposed in Bab Ezzouar MSC premises. That is to say : A) Minimum 2 Channel-spacing between macro layer on the roof top and each BCCH/TCH channel selected on the indoor sectors B) Once the indoor channels have been assigned, these have to be included manually into the for macrocell frequency assignment of the MSC neighbours avoidAFP co-channel interference.
The position of the Aurassi Hotel and the surrounding sites are shown in following the picture:
The Aurassi Hotel
Aurassi hotel position and its surrounding sites
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5. DETAILED DESIGN The following is the detailed design based upon our site survey (Sabrina & Hatem) inside the premises of the Aurassi hotel. The design is based upon our perception of indoor coverage from previous projects regarding coverage extent for a given EiRP (Pout + Antenna Gain – Feeder and Connectors Loss). We believe that RxLev will be higher that -75 dBm as the antennas used are panel 5 dBi antennas. 5.1. Conference Room and Restaurant (Floor E)
C
6. PROPOSED INDOOR DESIGN
A
Floor « E »
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5.2. VIP ROOM The VIP room is connected to the Conference Room and restaurant via the stairs. There is no space or location where to place the Micro-BTS except if we put it outdoors. The RBS2308 dedicated to the VIP room will be pillar-mounted in front of the VIP room. Great caution has to be given regarding frequency planning, as we might be interfered by outdoor macro sites from neighbourhood.
E
1 RBS 2308 To be installed outside on the pilar
24
Panel Antenna Placed outdoors to provide coverage indoors. 25
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5.3. Night Club (Floor B) The night club design is straightforward, as there is one option that should provide coverage to the whole dancing podium. Again, one dedicated RBS2308 will be installed as mentioned in the drawing below.
Panel Antenna Placed in the middle (wallmounted) facing the dancing pad.
1 RBS 2308 To be installed on the wall as depicted in the drawing.
Floor « B »
6. CONCLUSION The Aurassi indoor design is straightforward because : a) We already know that these indoor locations have capacity issues and therefore dedicated pico/microcell design is an obvious matter b) Coverage provided by the macro layer will never be able to reach deep indoor locations unless all the expected sites are on air. No repeater is to be used because Wataniya wants to leverage the macro sites and keep them for outdoor use only. As the indoor rollout is a fast one we do not think we will have time to do measurements when the pico-cells have been installed. We are quite confident, though, that the design is a comfortable indoor solution that will provide both coverage and capacity. However, for the event of the 24th, especially if more SIMs will be tested, we need to upgrade the TRUs from 2 to 4 per microcell.
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PHOTOS PANEL ANTENNA LOCATION TOWARDS RESTAURANT (FLOOR E)
