Soc Classification level
1 © Nokia Siemens Networks
Module 2
RU30 Feature Overview
Soc Classification level
2 © Nokia Siemens Networks
Agenda
Introduction and overview1) RU20 RECAP
2) RU30 Feature overview
Features enhancing already existing concepts3) HSDPA enhancement
4) HSUPA enhancement
5) Hardware enhancement
Introducing of new concepts6) State machine concepts
7) Mobility concepts
8) Enhanced HSPA concepts
Performance features9) New PM features
Soc Classification level
3 © Nokia Siemens Networks
RU30 Feature Overview
Features enhancing already existing concepts
Overview HSDPA128 HSPA users per cell
MIMO AND 64 QAM
Dual cell HSDPA with MIMO AND 64QAM
Dual band HSDPA
Overview HSUPAInter-frequency handover
Flexible RLC on UL
HSUPA 16 QAM 11.5 M
Dual cell HSUPA 23 M
Introduction Hardware4 Rx diversity
Flexi RRH 2 Tx 1800 MHz
Flexi 3 sector RF module 1900 MHz
180 W multi radio remote RF
Features introducing new concepts
New performance measurements
Soc Classification level
4 © Nokia Siemens Networks
HSDPA - 128 Users per Cell
HSDPA RU20
• 16 users per cell offered by basic package
• > 16 users per cell available by additional licenses
• 48 users per cell
• 64 users per cell
• 72 users per cell (includes also 72 users for HSUPA)
HSUPA RU20
• 20 users per cell offered by basic package
• > 20 users per cell available by additional license
• 72 users per cell
HSPA RU30
• New license option 128 users per cell (both HSDPA and HSUPA)
Soc Classification level
5 © Nokia Siemens Networks
HSDPA - MIMO and 64QAM
HSDPA RU20
• MIMO available by RAN 1642 OR
• 64QAM available by RAN 1643
• But NOT both simultaneously
HSDPA RU30
• MIMO AND 64QAM simultaneously availably by RAN 1912
RAN1912 RAN1642 RAN1643= +
Soc Classification level
6 © Nokia Siemens Networks
Peak throughput
• MIMO alone with 16QAM → 2 * 14 Mbps = 28 Mbps
• 64QAM alone without MIMO → 6 / 4 * 14 Mbps = 21 Mbps
• MIMO with 64QAM → 2 * 21 Mbps = 42 Mpbs
UE categories
• MIMO alone → Category 15 + 16
• 64QAM alone → Category 13 + 14
• 64 QAM OR MIMO → Category 17 + 18
• 64 QAM AND MIMO → Category 19 + 20
HS- DSCH
category
max. HS-
DSCH CodesModulation
MIMO
support
Peak
Rate
19 15 QPSK/16QAM/ 64QAM
Yes 35.3 Mbps
20 15 QPSK/16QAM/ 64QAM
Yes 42.2 Mbps
HSDPA - MIMO and 64QAM
Soc Classification level
7 © Nokia Siemens Networks
HSDPA - Dual Cell + 64QAM + MIMO
HSDPA RU20
• Dual cell available by RAN 1906 AND
• 64QAM available by RAN 1643
• But NOT with MIMO (RAN 1642)
HSDPA RU30
• Dual cell AND 64QAM AND MIMO simultaneously availably by RAN 1907
RAN1907 RAN1906 RAN1643= +
RAN1642+
Soc Classification level
8 © Nokia Siemens Networks
Peak throughput
• Dual cell HSDPA alone → 2 * 14 Mbps = 28 Mbps
• Dual cell HSDPA with 64QAM → 6 / 4 * 28 Mbps = 42 Mbps
• Dual cell HSDPA with MIMO → 2 * 28 Mbps = 56 Mbps
• Dual cell HSDPA with 64QAM + MIMO → 2 * 42 Mbps = 84 Mbps
UE categories
• Dual cell HSDPA alone → Category 21 + 22
• Dual cell HSDPA with 64QAM alone → Category 23 + 24
• Dual cell HSDPA with MIMO → Category 25 + 26
• Dual cell HSDPA with 64 QAM + MIMO → Category 27 + 28
HSDPA - Dual Cell + 64QAM + MIMO
HS- DSCH
category
max. HS-
DSCH CodesModulation
MIMO
support
DC-
HSDPA
support
Peak
Rate
25 15 QPSK/16QAM Yes Yes 46.7 Mbps
26 15 QPSK/16QAM Yes Yes 56 Mbps
27 15QPSK/16QAM/
64QAMYes Yes 70.6 Mbps
28 15QPSK/16QAM/
64QAMYes Yes 84.4 Mbps
Soc Classification level
9 © Nokia Siemens Networks
HSDPA – Dual Band
Dual Cell HSDPA RU20
• Two adjacent carriers under the same frequency band required
HSDPA RU30
• Two carriers under different frequency bands allowed
• Two non adjacent carriers under the same frequency band NOT allowed
F1 F2
F1 F2
Band x
Band x Band y
F1
Band x
F2
Soc Classification level
10 © Nokia Siemens Networks
Peak throughput
• Dual band HSDPA alone → 2 * 14 Mbps = 28 Mbps
• Dual band HSDPA with 64QAM → 6 / 4 * 28 Mbps = 42 Mbps
UE categories
• Dual band HSDPA alone → Category 21 + 22, 25 + 26
• Dual band HSDPA with 64QAM → Category 23 + 24, 27 + 28
HSDPA – Dual Band
Soc Classification level
11 © Nokia Siemens Networks
HSUPA - IFHO
RU20
• Inter-frequency HO, i.e. compressed mode, available for HSDPA
• But NOT for HSUPA, i.e. compressed mode requires channel type switch
form E-DCH to DCH
RU30
• Inter-frequency HO, i.e. compressed mode, available for HSUPA also
• No channel type switch from E-DCH to DCH required any more
• Less throughput degradation for user
• Less signaling required (no transition E-DCH to DCH in source cell, and DCH to
E-DCH in target cell any more)
• Faster execution of IFHO (gain of up to 1.5 s)
Soc Classification level
12 © Nokia Siemens Networks
HSUPA - Flexible RLC
RU20
• Flexible RLC available for HSDPA
• But NOT for HSUPA
RU30
• Flexible RLC available for HSUPA also
• Less overhead due to RLC header
• Less overhead due to padding (granularity of standard RLC packets with 336 or
656 bit)
Soc Classification level
13 © Nokia Siemens Networks
HSUPA - 16QAM
RU20
• Only QPSK
• Peak data rate of 5.8 Mbps
RU30
• QPSK or 16QAM in dependence on the available
resources and the quality of the air interface
• Peak data rate of 11.5 Mbps
Soc Classification level
14 © Nokia Siemens Networks
Peak throughput
• QPSK
• 1xSF4 → 3.840 / 4 = 0.96 Mbps
• 2xSF4 → 2 * 0.96 = 1.92 Mbps
• 2xSF2 → 2 * 3.840 / 2 = 3.84 Mbps
• 2xSF2 + 2xSF4 → 3.84 + 1.92 = 5.76 Mbps
• 16QAM
• 2xSF2 + 2xSF4 → 2 * 5.76 = 11.5 Mbps
UE categories
• QPSK
• 1xSF4 → category 1
• 2xSF4 → categories 2 + 3
• 2xSF2 → categories 4 + 5
• 2xSF2 + 2xSF4 → category 6
• 16QAM
• 2xSF2 + 2xSF4 → category 7
HSUPA - 16QAM
E- DCH
Category
max.
E-DCH
Codes
min.
SF
2 & 10 ms
TTI E-DCH
support
max. #. of
E-DCH Bits* /
10 ms TTI
max. # of
E-DCH Bits* /
2 ms TTI
Modu-
lation
Reference
combination
Class
7 4 2 10 & 2 ms 20000 22996 QPSK & 16QAM
11.5 Mbps
Soc Classification level
15 © Nokia Siemens Networks
HSUPA - Dual Cell
RU20
• Transmission on single carrier only
• Peak data rate of 5.8 Mbps (QPSK)
RU30
• Transmission on two carriers possible
• Peak data rate of 23 Mbps (16 QAM)
Soc Classification level
16 © Nokia Siemens Networks
Peak throughput
• Single carrier
• QPSK 5.76 Mbps
• 16 QAM 2 * 5.76 = 11.5 Mbps
• Dual cell
• QPSK 2 * 5.76 = 11.5 Mbps
• 16 QAM 2 * 11.5 = 23 Mbps
UE categories
• Single carrier
• QPSK 5.76 Mbps → category 6
• 16 QAM 11.5 Mbps → category 7
• Dual cell
• QPSK 11.5 Mbps → category 8
• 16 QAM 23 Mbps → category 9
HSUPA - Dual Cell
E- DCH
Category
max.
E-DCH
Codes
min.
SF
2 & 10 ms
TTI E-DCH
support
max. # of
E-DCH Bits* /
2 ms TTI
Modu-
lation
Reference
combination
Class
8 4 2 10 & 2 ms 11484 QPSK 11.5 Mbps
9 4 2 10 & 2 ms 22996 QPSK & 16QAM
23 Mbps
Soc Classification level
17 © Nokia Siemens Networks
Hardware - 4Rx Diversity
• Enhanced compensation of fast fading on the UL by usage of four receive
paths
• Combined space and polarization diversity (two cross-polarized antennas)
• Pure space diversity (four single-polarized antennas)
• Additional coverage gain against 2 Rx diversity around 1-3 dB
Combined space
and polarization
diversity
Pure space
diversity
Soc Classification level
18 © Nokia Siemens Networks
Hardware - Flexi RRH 2 Tx 1800 MHz
• With RU20, the following variants of Flexi RRH 2Tx have been introduced
• 900 MHz
• 2100 MHz
• The new RU30 variant operates in 3GPP band III
• UL: 1710-1785 MHz
• DL: 1805-1880 MHz
Soc Classification level
19 © Nokia Siemens Networks
Hardware - Flexi 3 Sector RF Module 1900 MHz
• With RU20, the following variants of Flexi 3 sector RF module have been
introduced
• 850 MHz
• 900 MHz
• 1500 MHz
• 1800 MHz
• 1700 MHz UL / 2100 MHz DL
• 2100 MHz
• The new RU30 variant operates in 3GPP band II
• UL: 1710-1785 MHz
• DL: 1805-1880 MHz
Soc Classification level
20 © Nokia Siemens Networks
Hardware - 180 W Multi Radio Remote RF
• With RU20, up to 60 W are available per sector
• With RU30, up to 180 W are available per sector shared among
WCDMA/LTE and GSM
• Up to 120 W for WCDMA/LTE
• Up to 60 W for GSM
WCDMA or LTE
GSM
60 W60 W 60 W
60 W60 W 60 W
120 W120 W 120 W
RU20 RU30
Soc Classification level
21 © Nokia Siemens Networks
RU30 Feature Overview
Features enhancing already existing concepts
Features introducing new concepts
State machine
HS Cell_FACH
Fast Dormancy
Mobility concepts
HSDPA Serving Cell Enhancements
Multi-band load balancing and blind IFHO
Single radio voice call continuity from LTE
HSPA
Dynamic HSDPA BLER
Dynamic HSUPA BLER
HSUPA DL physical channel power control
HSUPA interference cancellation receiver
Frequency domain equalizer
New performance measurements
Soc Classification level
22 © Nokia Siemens Networks
State Machine - HS Cell_FACH
RU20
• Very low capacity available in Cell_FACH state only
• 32 kbps on DL (FACH, S-CCPCH)
• 16 kbps on UL (RACH, PRACH)
• Causes problems in case of applications requiring frequent transmission of small
amount of data
• High signaling load due to frequent state transitions
• High battery power consumption for UE
• Strong occupation of dedicated resources for low total throughput
RU30
• HSPA available in Cell_FACH state, thus much higher capacity
• 1.8 Mbps on DL (HS-DSCH, HS-PDSCH)
• 1.4 Mbps on UL (E-DCH, E-DPDCH)
• UEs transmitting small amount of data need not to enter Cell_DCH any more
Soc Classification level
23 © Nokia Siemens Networks
State Machine - Fast Dormancy
Fast Dormancy
• UE requests from network to be shifted to state of low battery power consumption
because data session ended
• UE sends signaling connection release indication, “simulating” this way signaling
connection failure
RU20
• RRC connection is released, i.e. UE shifted to idle state
• RRC connection, RAB and radio bearer have to be re-established, if new data shall be
sent
• High signaling load introduced by UEs frequently transmitting small amount of data
RU30
• RNC tries to shift UE to Cell_PCH, i.e. to keep the RRC connection and the RAB
• No “ping-pong” between release and reestablishment, if new data shall be sent
Soc Classification level
24 © Nokia Siemens Networks
Mobility Concepts - HSDPA Serving Cell Enhancements
RU20 (standard feature)
• In SHO area HS UE sends periodic measurement reports to RNC
• RNC evaluates reports to decide about serving cell change
• Problems
• High signaling traffic due to periodic reporting
• If F-DPCH used, serving cell change command of RNC might not be decoded by UE, as
SRB on HS-PDSCH less robust than on DPDCH
RU30 (enhanced feature)
• No periodic reporting in SHO area any more, but serving cell change triggered by
event 1D
• Better robustness for SRB on HS-PDSCH
• RNC sends pre-information about potential target cells during active set update already
• Serving cell change commands transmitted both in source and target cell
Soc Classification level
25 © Nokia Siemens Networks
Mobility Concepts – Layering RU20
DCH cell
DCH cell
Non HSPA
capable UE
HSPA
capable UE
HSDPA cell
Redirection or
handover at:
RRC connection
setup only
DCH cell
HSDPA cell
HSDPA cellConnection setup or
transition FACH to DCH
RAN 502
Directed RRC Connection
Setup for HSDPA Layer
RAN 1011
HSPA Layering for UEs in
Common Channels
RAN 1596
HSPA Capability Based
Handover
Anytime during CELL_DCH
or on HSPA traffic inactivity DCH cell
HSPA cell
HSPA cell
i-HSPA cell
Redirection with HSDPA load balancing
Same / different
band
Same / different
band
Soc Classification level
26 © Nokia Siemens Networks
Support of more mobility scenarios
• HSPA capable UE with CS RAB in HSDPA cell moved to DCH cell (extension of RAN 502 and RAN 1011)
• Target and source cell load checked prior HSDPA inactivity triggered HO (extension of RAN 1596)
• Load based HO triggered by HSPA traffic overload (extension of RAN140)
Load sharing / balancing between HSPA cells / bands
• Better frequency resource utilization by directing UE to different frequency bands or layers in multi-band
networks
• Supports of service versus band strategy in multi-band networks (e.g. 2.1 GHz and 900 MHz)
More HO trigger
• UE capability
• Service type
• Load
• Distance
More criteria for target cell selection
• UE capability
• Service type
• Frequency band
• Load of target / source cell load
• Distance of UE from source / target cell
Mobility Concepts – Layering RU30
Soc Classification level
27 © Nokia Siemens Networks
• Each carrier and frequency band can be differently prioritised
• Carrier frequency layer priority (preference score) effected by
• Preferred frequency weight: Selection of carrier preferred for configurations on basis of UE capability
and used RAB
• Band weight: Selection of one preferred frequency band on RNC level
• RSCP weight: High / low band preference depending on UE distance from source cell
• Load weight: HSDPA cell or carrier / frequency layer preference based on load balance / overload
• Each factor represented by weight is configurable.
• Candidates for multi-layer load balancing are IF neighbours on layers higher prioritised
then source cell layer, in bands supported by UE
Freq layer priority
(Preference Score)=
Preferred Freq
weight
Freq Band
weight
RSCP
weight
Load
weight+ + +
= = = =
0
or
LaySelWeightPrefLayer
0
or
LaySelWeightBand
0
or
LaySelWeightRSCP
0
or
>=LaySelWeightLoad
Not considered for
fast moving UEs
Not considered for non-
HSPA UEs or other with
CS RAB in DCH cell
Mobility Concepts – Layering RU30
Soc Classification level
28 © Nokia Siemens Networks
Mobility Concepts – ISHO WCDMA / LTE RU20 / RL10
• From WCDMA to LTE
• Only cell re-selection in RRC idle, Cell_PCH or URA_PCH, but NOT in Cell_FACH
• No handover supported in Cell_DCH
• From LTE to WCDMA
• Cell re-selection in RRC idle + EMM registered
• Coverage based redirection in RRC connected (no seaming less mobility, as RAB
released under LTE and re-establishment under WCDMA)
LTEWCDMA
Cell reselection
RRC idle / Cell_PCH / URA_PCH
Cell reselection
RRC idle + EMM registered
Redirection
RRC connected
Soc Classification level
29 © Nokia Siemens Networks
• From WCDMA to LTE
• No changes in comparison to RU20
• From LTE to WCDMA
• Cell re-selection in RRC idle + EMM registered
• Coverage based intersystem handover in RRC connected
LTEWCDMA
Cell reselection
RRC idle / Cell_PCH / URA_PCH
Cell reselection
RRC idle + EMM registered
Intersystem handover
PS Voce over IP becomes CS AMR
RRC connected
Mobility Concepts – ISHO WCDMA / LTE RU30 / RL20
Soc Classification level
30 © Nokia Siemens Networks
HSPA - Dynamic BLER Target on DL
RU20
• Non configurable BLER target, independent on the CQI
• 10% for static channel
• 25% for fading channel
RU30
• BLER target configurable, in dependence on
• fading
• CQI
• With lower BLER target under good conditions up to 8 % more throughput can be
achieved
Soc Classification level
31 © Nokia Siemens Networks
RU20
• Non configurable BLER targets applied by outer loop power control, independent on
the transmission characteristics and the service class
• 10% ideal BLER target
• 16% maximum BLER target
RU30
• BLER targets still not configurable in most cases, but transmission characteristic as
well as service class taken into account
• The following transmission scenarios are considered
• Peaky transmission
• Bursty transmission
• Continuous transmission
• The following service classes are considered
• NRT
• Streaming
• Voice 2ms and 10ms TTI (BLER targets configurable)
• SRB 2ms and 10ms TTI
HSPA - Dynamic BLER Target on UL
Soc Classification level
32 © Nokia Siemens Networks
HSPA - HSUPA DL CCH Power Control RU20
Static power for E-AGCH, E-RGCH, E-HICH and F-DPCH
• Power of all channels set relative to a reference power
• PChannel = PRef + general offset
• Additional offsets can be applied under the following conditions
• E-DCH in SHO
• 2 ms TTI used (not for F-DPCH)
• Total power budget
• PChannel = PRef + general offset + SHO offset + 2ms TTI offset
• The reference power is fixed relative to the CPICH
• PRef = PCPICH - 8 dB for E-AGCH
• PRef = PCPICH - 14 dB for E-RGCH
• PRef = PCPICH - 14 dB for E-HICH
• PRef = PCPICH - 9 dB default for F-DPCH
Soc Classification level
33 © Nokia Siemens Networks
Dynamic power for E-AGCH, E-RGCH, E-HICH and F-DPCH
• Reference power not fixed anymore, but adjusted by a similar way as that of the HS-
SCCH
• DL quality taken into account by CQI
• Less power needed under good conditions
• More power available for user data
HSPA - HSUPA DL CCH Power Control RU30
Soc Classification level
34 © Nokia Siemens Networks
HSPA - HSUPA Interference Cancellation Receiver
RU20
• Users with low level services (usually with 10ms TTI) strongly interfered by
users with high level services (usually with 2ms TTI)
RU30
• Interference contribution of 2ms TTI users subtracted from total signal
arriving at BTS before demodulating and decoding the signals of 10ms TTI
users
• Less power needed by 10ms TTI users due to cancelled interference of 2ms TTI
users
• 2ms TTI users less interfered by 10ms TTI users due to lower power
• Optionally interference contribution of individual 2ms TTI users subtracted
before demodulating and decoding other 2ms TTI users
Soc Classification level
35 © Nokia Siemens Networks
Types of users
• IC users
• Users whose interference contribution is cancelled from the total signal
• Users mapped on E-DCH with 2ms TTI (usually those with highest power)
• Do not get any direct benefit from interference cancellation
• Non-IC users
• Users for which interference is reduced, as the contribution of the non IC users is cancelled from the total
signal
• Remaining users mapped on E-DCH with 2ms TTI (usually such ones with lower power)
• All 10ms TTI E-DCH users
• All DCH users
RTWP
Time
IC Users = interferers to be cancelled
Non IC Users = users for which
interference is reduced
HSPA - HSUPA Interference Cancellation Receiver
Soc Classification level
36 © Nokia Siemens Networks
HSPA - Frequency Domain Equalizer
Handling of multi-path propagation
• Identify time delays at which significant energy arrives and allocation of the rake fingers to those peaks
• Track fast changes of phase and amplitude originating from fast fading by each rake finger
• Combine demodulated and phase adjusted symbols across all active fingers and present them to decoder for
further processing
Problem
• With HSUPA very short spreading codes (SF down to 2) introduced
• Very sensitive to inter-symbol interference introduced by time delay
• Maximum data rate of e.g. 5.8 Mbit/s not achieved, saturation at e.g. ≈ 4 Mbit/s even under very good signal-to-
noise-ratio conditions
Soc Classification level
37 © Nokia Siemens Networks
Idea
• Reduce inter-symbol interference by combination of
• Linear equalization
• Fast convolution
• Obtain peak data rates closer to the limits of
• HSUPA 5.8 Mbit/s (2xSF2 + 2xSF4 with QPSK
• HSUPA 11.5 Mbit/s (2xSF2 + 2xSF4 with 16QAM)
HSPA - Frequency Domain Equalizer
x(k) h(k)
Before filtering After filtering
High frequencies
removed by low pass
Soc Classification level
38 © Nokia Siemens Networks
RU30 Feature Overview
Features enhancing already existing concepts
Features introducing new concepts
New performance measurements
Periodic measurements
Automatic object list update in RNC measurements
End user experienced throughput
Bandwidth utilization class counters for IP and Ethernet
Soc Classification level
39 © Nokia Siemens Networks
Periodic Measurements
UE measurements
• RU20 provides reporting only in case of certain events, i.e. in SHO or HHO area
• RU30 provides periodic reporting like in GSM, independent from the situation on the air interface
• The following properties already known from RU20 can be reported periodically for HSPA calls
(not R99 ones)
• EC/I0 (any visible cell)
• RSCP (any visible cell)
• UE power
• The following new properties introduced by RU30 can be reported periodically for any call
• Rx-Tx time difference (active cells only)
RNC
UE measurements: - CPICH Ec/No - CPICH RSCP - UE Tx Power - UE Rx-Tx
500m
s
500m
s
500m
s
500m
s
Soc Classification level
40 © Nokia Siemens Networks
BTS measurements
• According RU20 reporting according slow cycle = 10 * radio resource indication period, if there is
no event
• Reporting according fast cycle = radio resource indication period, in case of high air interface
load or strong change of load
• RU30 provides periodic reporting, independent from the load situation
• The following properties already known from RU20 can be reported
• Transmitted carrier power and R99 power (per cell)
• Received total wideband power (per cell)
• Radio link power (per link)
• The following new properties introduced by RU30 can be reported also
• Round trip time (per link)BTS measurements: - DL RL power - UL RTWP- DL Total Carrier Power - DL R99 power- RTT
RNC500m
s
500m
s
500m
s
500m
s
Periodic Measurements
Soc Classification level
41 © Nokia Siemens Networks
• If the transport network is modified, the list of objects handled by the following
measurements is updated automatically, no manual update required anymore
• RNC transport measurements
• RNC hardware measurement
RNC transport / HW measurements
RU30
ZT2 command group
MML
RNW Measurement
Management
Start measurements with “all objects”
option to monitor all objects
Automatic Object List Update in RNC Measurements
Soc Classification level
42 © Nokia Siemens Networks
End User Experienced Throughput
RU20
• Information about throughput available per scheduling priority indicator, i.e. per
service class
Counters M5002C5..C20 consider throughput for SPI 0..15
• Information about number of users available per cell only, not per service class
Counters M1000C167..C175, M1000C240..C247, M1000C314..C317 and
M1000C390..C393 consider time the total number of HSDPA users is within certain
interval
• One cannot determine the throughput experienced by users with a specific service
class
RU30
• New counters considering the number of HSDPA users per service class
• One can determine the throughput experienced by users with specific service class
Soc Classification level
43 © Nokia Siemens Networks
Bandwidth Utilization Class Counters for IP and Ethernet
• For each IP route, RU20 counters M568C0 to M568C9 give information about
• IP datagram volume sent and received
• Configured bandwidth
• Minimum, average and maximum bandwidth reserved by IP CAC
• Minimum, average and maximum number of IP/UDP connections reserved by IP CAC
• New RU30 counters M568C10 to M568C17 give information about
• Utilization → clearer picture about congestion situations
• Bandwidth used for shaping
• Outgoing and incoming peak throughput
RNC
IP data volume
IP bandwidthIP/UDP connections
IP utilization
Traffic as % of configured bandwidth
44 © Nokia Siemens Networks RU30 for Network Planners 2011
Thank You !