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Dual / 1
Dual Cell
Dual / 2
1900 MHz/800 MHz Integration
1900
800
Dual / 3
TDMA/136- Merging of 800 & 1900 deployments
TDMA 800
TDMA 1900
TDMA 1900
Increase capacity
Increase coverage- new licenses enabling extended coverage
Full coverage from day one!- dual mode/dual band phones
Re-use of existing infrastructure
Better trunking efficiency
Dual / 4
TDMA/136- The dual-band standard
Dual-band/dual-mode terminal800 MHz AMPS/TDMA& 1900 TDMA
800 MHz AMPS/TDMA
1900 MHz TDMA
An example of how an operatorcan get nationwide coverageby merging 800 & 1900 MHzdeployments
Dual / 5
One System
800 1900MHz
1900MHz
800MHz800 1900MHz
MSC(ICMS8800)
Dual / 6
TCB
Infrastructure Reuse
MSC CRI
PSTN
ETC
EMRP
ANP
ATCC
Rx
ATC Tx
RTT TRX MC
ETB
STR
EMRPSNTSWGS
MTRAC
Dual / 7
RBS 884 Macro (1900MHz) 3X15 Maximum Up to 15 carriers
per cell City and Rural
applications
TCB a
TCB b
ANPC 1
TCB c
ATCC a
ATCC b
ANPC 2
ATCC c
ATCC a
ATCC b
CRI
ATCC c
TCB d
TCB e
TCB f
CRI POWD POWD
RBS 884 Macro Quad (1900MHz) 3X16 Maximum Up to 16 carriers
per cell Rural applications
TCB a
ATCC a
ANPC a
CRI
POWD
TCB a
ATCC a
TCB a
TCB a
TCB b
ATCC b
ANPC b
POWD
TCB b
ATCC b
TCB b
TCB b
TCB c
ATCC c
ANPC c
1/2 CRI
TCB c
ATCC c
TCB c
TCB c
Main
Prim
Prim
RBS 884 Micro (1900MHz) 3x4 Maximum Up to 12 carriers
per site City and in building
applications
Base Stations in 1900MHz Band
Dual / 8
RBS 884 Macro
City and rural sites Three power classes:
36 dBm 40 dBm 44 dBm
32 carriers/cell
RBS 884 Micro With MCPA
City and rural sites 36 dBm 24 carriers/cell
RBS 884 Pico
Indoor sites <20 dBm 4 carriers/cell
RBS 884 Micro Indoor sites 24 dBm 24 carriers/cell
POWD POWD
TCB
CRI ANPC 1
ANPC 2
TCB
TCB TCB
TCBTCB
TCB
TCB
ATCC 1
ATCC 1
ATCC 1
ATCC 2
ATCC 2
ATCC 2
TCB
TCB
TCB
CRI
Base Stations in 800MHz Band
Dual / 9
Better Trunking EfficiencyBetter Trunking Efficiency
Common trunking group means higher capacity.
Example:
20 + 20 Channels
One System: 30.1 Erlang @ 2% GOS
Separate Systems: 26.4 Erlang @ 2% GOS
=> 14% Higher Capacity with CMS8800.
Same coverage assumed
Dual / 10
1900
800
800
800
R1
0.7R1
Due to different propagation, 1900 MHz gives smaller radius at same output power.
Only when range is noise limited, i.e. rural sites. Urban sites is usually C/I limited
1900 and 800 Coverage Issues
Dual / 11
System Configuration
Use existing sites when possible
1900 1900
800
800
800
19001900
800
800
800
800
Either create hand-off zones (1900-800-1900) or Deploy new 1900 sites to over the inter-hyperband hand-off corridor
Dual / 12
MAHO-List
Cell A 850Cell B 1900Cell D 850Cell C 850
Hand Off
1900
850
Dual / 13
Hyperband Handoff Using the HCS Algorithm
850 layer
1900 layer
Preferred
Standard
NonPreferred
Dual / 14
Microcell 2 & 3: StandardMicrocells 4: Preferred
Sel. 1Sel. 1 Sel. 4Sel. 1Sel. 2
Macrocell 1
Microcell 4Microcell 3Microcell 2
SS-SUFF
HCS Macro Cell – Micro Cell Hand-Off
Dual / 15
Dual Cell Verification
When the 850 and 1900 are co-located
Ability to use the 850 MHz MVER to verify the 1900 Handoff
1900
8501900 850
MV
ER MV
ER
850 to 1900 Hand off
Dual / 16
Border Areas
When leaving the 1900 coverage area
1900 MVER is needed in the neighbor cell
Ability to use the 1900 MHz MVER to verify the 850 Handoff
1900
8501900 850
MV
ER MV
ER
1900
850
1900 850
MV
ER MV
ER
850 to 1900 Hand off
Dual / 17
800 MHz buffer zone with 1900 co-located sites
800 800
800
800
800
800
800
800
Border Issues
1900
1900
1900
Dual / 18
Using SSSUF in the Border Areas
850 layer
1900 layer
Standard
SSSUF= x dB SSSUF=x+10 dB
Dual / 19
Border Issue
It is recommended to have 1900 verification device (LVM) for 1900/800 handoff.
The 1900 LVM must have same coverage as the 800 cell.
1900
800
Only when range is noise limited, i.e. rural sites.
Urban sites is usually C/I limited.
1900 coverage for theverification device
Dual / 20
MSC(TDMA/136.A)
MSC(TDMA/136.0)
MSC(IS-54.B)
1900 MHz DTCACELP Codec
MSC(Other vendor
MSC with level of
functionality < TDMA/136.A)
MSC(TDMA/136.A)
1900MHz to 800MHz (Analog)800 MHz(ACELP) to 800 MHz (Analog)800 MHz (Analog) to 800 MHz (A/D)800 MHz (VSELP) to 800 MHz (A/D)
1900 MHz to 1900 MHz1900MHz to 800MHz (A/D)800 MHz(ACELP) to 800 MHz (A/D)800 MHz (Analog) to 800 MHz (A/D)800 MHz (VSELP) to 800 MHz (A/D)
IS-41.C or lower/MTUP
IS-41.C + TSB76 (PCS Multi-Band Support)
Network Support
Dual / 21
1900 MHz systems take full advantage of the functionality provided
by TDMA/136.A and thereby are fully integrated to their the 800 MHz
counterpart
Bi-directional Inter-Hyperband Handoff
Bi-directional Inter-Hyperband Directed Retry
Multi Hyperband Capable Best Server Selection support
Network inter-operability is fully supported by IS-41.C + TSB76
Inter-system Inter-Hyperband Handoff
Full roaming support
Ericsson supports dual band-dual mode systems as of Release C.
Standard Support
Dual / 22
Conclusions
1900 MHz systems can be deployed based on existing infrastructure
Same functionality is offered on both 1900 MHz and 800 MHz hyperbands which allows for both capacity driven and service driven deployment
Level of integration depends on customer commercial strategy
Considerations might be taken when inter-operating towards ‘other vendor’ systems which level of functionality is not compatible with PCS systems