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Farrukh Feroze Ali
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  • Karachi
  • Pakistan
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RSSI and CINR values for HO in Mobile WiMAX

Hello Awadh, Not sure about RSSI, I have seen CINR values of around 13 dB to trigger HO, also there is a PER based BS initiated HO measured in UL. Regards, - Farrukh

Replied Jan 3

Wimax BST and ASN gateway Relation

Hello Peter, My below explanation might help you. 1) Its between the two; ASN G/W separates Access and Core, but I have seen it placed at the core side, since single ASN-GW can support many BTS. 2…

Replied Apr. 30, 2009

IP Backhaul

I have used Dragonwave in 23 GHz as backhaul, it supports IP traffic over Ethernet interface.

Replied Apr. 30, 2009

ASN Profiles

All Reference points (R1...R8) are logical interfaces that operate up to different layers with support for different protocols. There physical implementation may vary. For instance, the R6 interface…

Replied Oct. 31, 2008

WiMAX R6 interface

Hello Murtaza, My explanation might help you understand the purpose for R6, CPE's Gateway is ASN-GW, to carry MAC layer information transparently to ASN-GW IPoETH-CS are used. ASN-GW acts like a Br…

Tagged: VPN, GRE, R6

Replied Oct. 31, 2008

 

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Latest Activity

Farrukh Feroze Ali replied to Mohammed Awadh Ben-Mubarak's discussion 'RSSI and CINR values for HO in Mobile WiMAX'
Hello Awadh, Not sure about RSSI, I have seen CINR values of around 13 dB to trigger HO, also there are few PER based BS initiated HO measured in UL. Regards, - Farrukh
on Sunday
Robert Syputa commented on Farrukh Feroze Ali's blog post 'Uplink interference in WiMAX'
"The odds of interference lessens if system is on average having higher UL MCS (Modulation and Coding Sequence), as less slots are occupied per subscriber to meet QoS requirement, but this raises the needs for high UL CINR levels to meet MCS require…
October 3, 2009
Farrukh Feroze Ali added a blog post
One of the prime concerns for WiMAX network designers is to eliminate the unwanted signals from network. Unlike traditional Single carrier/TDMA based systems, WiMAX 16e requires greater understanding of frequency allocations because of OFDMA based s…
September 27, 2009
zahra.bakhti left a comment for Farrukh Feroze Ali
September 16, 2009
zahra.bakhti left a comment for Farrukh Feroze Ali
September 16, 2009
Farrukh Feroze Ali replied to Kai Miao's discussion 'The reasons for why WiMAX is a good technology for the enterprise' in the group Enterprise WiMAX
We have used WiMAX for enterprise connectivity in licensed band. Most enterprise require fixed access in our scenarios where competition is mainly between unlicensed Ethernet bridges (P2P) and other wired options but client prefer it due to quick de…
May 13, 2009
Farrukh Feroze Ali joined Kai Miao's group
Enterprise WiMAX
WiMAX has been created with the consumer market in mind and with its standards targeting the telco wireless (cellular-like) infrastructure. However, WiMAX is definitely much more than that. This WG explores how WiMAX can be used for the enterprise.
May 13, 2009
Alan J Weissberger commented on Farrukh Feroze Ali's blog post 'Reduced CAPEX/OPEX'
Can you compare the capex/opex for: 3G/ 3.5G, mobile WiMAX and LTE? Opinion: It seems to me that 3G/ 3.5G would have the lowest CAPEX/OPEX as it's a data network overlay of existing cellular networks. However, it is not all IP based and suffers fro…
May 4, 2009

Profile Information

Interests
Wimax QoS, IP integration, Mobility
About Me
An engineer with a passion to learn
Current Company
SNL
Company Description
Prime WISP in Pakistan
Current Position
Senior Network Engineer
Areas of Expertise
BWA, Wimax, IP, QoS, RF.
Country of Residence
Pakistan
City
Karachi
Why are you interested in WiMAX?
I want to be part of this technology revolution by sharing knowledge and keeping myself up to date with it.

Farrukh Feroze Ali's Blog

Farrukh Feroze Ali

Uplink interference in WiMAX

One of the prime concerns for WiMAX network designers is to eliminate the unwanted signals from network. Unlike traditional Single carrier/TDMA based systems, WiMAX 16e requires greater understanding of frequency allocations because of OFDMA based scheduling. Most licenses issued by the regulators around the World do not allow leverage of planning with frequency re-use patterns of 3x3x3 and designers have to persist with re-use patterns of 1x3x3.

One of the factors that influence the inter-cell… Continue

Posted on September 27, 2009 at 12:52pm — 1 Comment

Farrukh Feroze Ali

Reduced CAPEX/OPEX

Investors are considering investment in rising 3G/4G technologies that involve huge CAPEX/OPEX investment. The ever competing market of Today requires careful analysis of expected returns.

CAPEX budgets summarize plans for major investments that can provide benefit for more than the operating cycle, whereas most operating budgets and financial budgets cover a period of one fiscal year. Operating budgets are based on Sales forecast (Sales Budget), Production budget (for service provider industry… Continue

Posted on May 4, 2009 at 7:30am — 1 Comment

Comment Wall (5 comments)

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At 2:26am on September 16, 2009, zahra.bakhti said…
Dear Farrukh
WOULD YOU SAY ME HOW CAN I SIMULATE FREQUENCY REUSE 3 IN OPNET, HOW SHOULD I DEFINE 3 PHYSICAL PROFILE TO USE FREQUENCY REUSE 3, PLEASE HELP ME . THANK YOU IN ADVANCE.
At 2:54pm on September 15, 2009, zahra.bakhti said…
Dear Farrukh,
Do you kow how can i manage frequency reuse 3 in opnet modelere 14.5 , I don't know how can in subdivide subchannel in puse mode and gave it to each sector in one cell , how should i manage the physical profile , if opnet isn't a good option, wich of network simulator is good option for this porpuse,please give me some advice, i'm really confuseed.
At 10:03am on August 31, 2008, Rima said…
Hello Farrukh,

In an OFDM symbol guard-band subcarriers are nulled in order to enable the signal to naturally decay and create the FFT “brick Wall” shaping, as there is no PERFECT filter.
From my practical experience, it’s not recommended to use adjacent channels (For example F1=3524 (fmin= 3522.25-fmax= 3525.75); F2= 3527.5 (fmin= 3525.75-fmax= 3529.25) and F3=3531 (fmin= 3529.25-fmax=3532.75)) at the same site because this will result in a performance degradation (High BER rate..)
But there is a possibility to use even the same channel with “back to back sectors” at the same site using directional antenna with good front to back ratio, Equipments with good ACR values with different polarisations (For fixed WiMAX)..

Regards,

Rima
At 10:06am on August 16, 2008, Rima said…
Hi Farrukh,

We are talking about guard intervals between adjacent frequency blocks assigned by regulators to operators,you see.
Let's suppose that we have two adjacent channels at the 3.5 GHz band with a channel size of 3.5 MHz ( for instance the channel 3524 MHz & the channel 3527.5 MHz (central frequency)) could they be used by two near face-to-face sectors ??


Regards,

Rima
At 1:59pm on August 8, 2008, Jawad said…
Hi Farrukh!

Glad to see you here.

Regards,
Jawad
 
 

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