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Did you find this post helpful? |Re: RSSI and RTWP
RTWP:The RTWP reflects the total noise level within the UMTS
frequency band of one
single cell.
now !ore What is RTWP?
RSS":Received Signal Strength "ndicator indicates the strength
of the inco!ing #received$
signal in a receiver.
In a network is not loaded, normal, acceptable RTWP Average
value is generally around-10!" and -10"!" d#m!
$alues around -%" d#m indicate t&at t&e cell &as
some uplink inter'erers!
I' t&e value is around -(" d#m, t&e situation is ugly,
wit& strong uplink inter'erers!
)sually we &ave *ig&, +ow and edium measures o' RTWP!
*owever, t&e maimum andminimum values are recommended only as
auiliary or re'erence, since t&ey may &ave been
http://telecomfunda.com/forum/showthread.php?27528-What-is-RTWPhttp://telecomfunda.com/forum/helpfulanswers.php?do=guestratehttp://telecomfunda.com/forum/helpfulanswers.php?do=guestratehttp://telecomfunda.com/forum/showthread.php?27528-What-is-RTWP
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caused by a peak o' access, or even been 'orced to &ave a
momentary value due to somealgorit&m i!e!!
T&us, t&e value t&at &elps us, and &as
t&e most accurate in'ormation is t&e same ean
RTWP.
/or cases in w&ic& cell &as two carriers, t&e
di''erence between t&em RTWP s&ould noteceed d#!
#ased on t&ese typical values, most vendors &ave an
alarm RTWP 2$ery *ig&! 2
What to do in case of problems?
We &ave seen t&at RTWP can cause per'ormance
degradation, mainly 34 3all 5rops! 6ote
Actually, it7s not RTWP t&at causes per'ormance degradation!
W&at &appens is t&at w&en itsvalue is 7bad7, it7s
actually indicating t&e presence o' inter'erence - t&e
latter being
responsible 'or degradation!
#ut w&at can we do w&en we 'ind bad values8
I' RTWP is not at acceptable levels, some actions s&ould be
taken!
T&e 'irst t&ing to do is c&eck i' t&ere is a
con'iguration issue wit& t&e R63 or 6ode#! T&is is
t&e
most common case, especially in cases o' new activations!
9nce veri'ied t&e parameter settings, t&e net step is
t&e p&ysical eamination, especially :umpersand cables,
o'ten partially reversed! It also s&ould be c&ecked i'
t&ere is 'aulty transmitters, or any
ot&er problem t&at could generate intermodulation
between t&e 6ode# and t&e antenna!
I' t&e parameter settings and &ardware are ok, t&e
c&ance is very &ig& t&at we &ave eternal
inter'erence, suc& as a Inter'erer Repeater!
