THIS SPREAD SHEET CAN BE USE TO CALCULATE THE HEAT LOAD IN BTU FOR SPECIFIC ROOMFull description
HVAC load calculationFull description
calculationDeskripsi lengkap
fire load
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Xls of load calculation
The primary objective of this report is to provide a convenient, consistent and accurate method of calculating heating and cooling loads and to enable the designer to select systems that meet the requirement for efficient utilization and are also res
Paging load calculation Here are the parameters those are related with the paging. 1. CCH-CO CCH-CONF NF =0. This This means means we are using using main main BCCH with with one CCCH channe channel. l. So we will be having nine blocks for both PCH and AGCH (36 TDMA frames). 2. Bs_A Bs_AG_ G_Bl Blk_ k_Re Ress =2. =2. This This mean meanss we have have stat static ical ally ly allo allocat cated ed two two block blockss for for AGCH channel. The remaining seven blocks will be allocated dynamically to both PCH and AGCH. So if the paging message is overloaded, then the number of blocks for AGCH will be limited. 3. We are using using IMSI IMSI paging paging and paging paging reques requestt type 1. So we can can page two IMSI IMSI in one paging message at maximum. 4. MSC will will do the re-pagi re-paging ng once. That That is when when there is is no response response for for first first paging paging within 3 sec the MSC will re-page again. So normally it is expected that 20% of the paging message will be re-paged. CCCH multi-frame has 51 TDMA frames. Duration of this multi-frame is 235ms. So within this 235ms we will be having seven PCH blocks at maximum. Which means the BSC can page 14 IMSI per 235ms. So for one hour we can page a maximum of 214, 214,46 468 8 IMSI IMSI.. Sinc Sincee we have have enab enable le re-p re-pag agin ing, g, the the actu actual al capa capaci city ty beco become mess 214,468/1.2=178,723. So we can page 178,723 IMSI in one hour as maximum.
Since the paging is not uniform throughout the day, normally it’s better if we didn’t exceed 30% of this limit to accommodate ac commodate all those paging message even in off-peak time.
Attanaagalla_1 Attanaagalla_1 Attanaagalla_1 Attanaagalla_1 Total for one hour
11621(Number of Paging Messages) 51388 54966 55254 50194 211,802
According to the above table it is clear, the number of paging messages exceed the maximum limit. So there is going to be paging congestion. Since paging congestion is there, all the seven blocks are going to be assigned for PCH. So there will be only two blocks for AGCH. Therefore it leads to AGCH congestion. As a final we will get SDCCH Assignment failure.
Ti m e
1 9 0 0 1 9 1 5 1 9 3 0 2 0 0 0
11626( Numb 11684( er of Numb Succe er of ssful MOC Call of Acces Rando s m Attemp Acces ts) s)
Alias
11625( Numb er of Rando m Acces s Attemp t)
11685( Numb er of MTC Acces s Attemp ts)
11686( Numb er of LOC Acces s Attemp ts)
11636( Numb er of MOC Acces s Succe ssful)
11637( Numb er of MTC Acces s Succe ssful)
11638( Numb er of LOC Acces s Succe ssful)
11644( Numb er of SDCC H Assign ment Succe ssful)
11645( Numbe r of SDCC H Assign ment Failure )
Attana agalla _1
607
607
269
159
179
215
132
149
496
109
Attana agalla _1
678
678
352
174
152
251
126
108
485
194
Attana agalla _1
662
662
329
177
156
243
133
113
489
174
Attana agalla _1
522
522
250
162
110
206
130
94
430
92
We can define SDCCH assignment failure as SDCCH Assignment failure (C11645) = Number of Immediate Assignment send by BSC- Number of Establish Indication received by BSC.
From above table it is clear, in peak hours, there is huge different in between the number of Immediate assignment sent and the number of Establishment received. AGCH congestion is the cause of this problem. So if we break this LAC area into two, the PCH channel will not overloaded. So we can have more blocks for AGCH.
