Transcript Dual Cell

Dual Cell
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1900 MHz/800 MHz Integration
1900
800
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TDMA/136
- Merging of 800 & 1900 deployments

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
TDMA 1900
TDMA 800
TDMA 1900
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TDMA/136
- The dual-band standard
800 MHz AMPS/TDMA
1900 MHz TDMA
Dual-band/dual-mode terminal
800 MHz AMPS/TDMA
& 1900 TDMA
An example of how an operator
can get nationwide coverage
by merging 800 & 1900 MHz
deployments
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One System
800 1900MHz
MSC
(ICMS8800)
800 1900MHz
1900MHz
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800MHz
Infrastructure Reuse
ANP
MSC
TCB
CRI
ATCC
PSTN
MTRAC
Rx
GS
NTSW
RTT
TRX
MC
EMRPS
ETC
STR
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ATC
ETB
EMRP
Tx
Base Stations in 1900MHz Band
Prim
Main
Prim
RBS 884 Micro
(1900MHz)
CRI
POWD
POWD
POWD
TCB c
ATCC c
ATCC c
ANPC 1
ANPC 2
CRI
TCB f
TCB b
ATCC b
ATCC b
TCB a
ATCC a
ATCC a
CRI
TCB b
1/2 CRI
TCB c
ANPC a TCB a
ANPC b TCB b
ANPC c
TCB c
TCB e
ATCC a
ATCC a
ATCC b ATCC b
ATCC c
ATCC c
TCB d
TCB a
TCB a
TCB b
TCB c
TCB c
RBS 884 Macro
(1900MHz)
TCB a
POWD
TCB b
RBS 884 Macro Quad
(1900MHz)

3x4 Maximum

3X15 Maximum

3X16 Maximum

Up to 12 carriers
per site

Up to 15 carriers
per cell

Up to 16 carriers
per cell

City and in building
applications

City and Rural
applications

Rural applications
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Base Stations in 800MHz Band
POWD
RBS 884 Pico


Indoor sites
<20 dBm
4 carriers/cell
RBS 884 Micro



Indoor sites
24 dBm
24 carriers/cell
RBS 884 Micro
With MCPA


City and rural sites
36 dBm
24 carriers/cell
TCB
ANPC 2
TCB
ANPC
1
TCB
TCB
ATCC 1 ATCC 2
TCB
TCB
TCB
ATCC 1 ATCC 2
TCB
TCB
TCB
ATCC 1 ATCC 2
TCB
RBS 884 Macro


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CRI
CRI


POWD
City and rural sites
Three power classes:
36 dBm
40 dBm
44 dBm
32 carriers/cell
Better 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
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1900 and 800 Coverage Issues
R1

Due to different propagation,
1900 MHz gives smaller radius
at same output power.
800
800
1900
Only when range is noise
limited, i.e. rural sites.
 Urban sites is usually C/I limited

800
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0.7R1
System Configuration
Either create hand-off zones
(1900-800-1900) or Deploy new
1900 sites to over the interhyperband hand-off corridor
Use existing sites when possible
800
800
800
1900
800
1900
800
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1900
800
800
Hand Off

MAHO-List
Cell A
Cell B
Cell D
Cell C
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850
1900
850
850
1900
850
Hyperband Handoff Using the HCS Algorithm
Standard
1900 layer
Preferred
Non
Preferred
850 layer
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HCS Macro Cell – Micro Cell Hand-Off
Macrocell 1
Microcell 2 & 3:
Microcells 4:
Standard
Preferred
Microcell 2
Microcell 3
Microcell 4
SS-SUFF
Sel. 1
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Sel. 2
Sel. 1
Sel. 4
Sel. 1
Dual Cell Verification
When the 850 and 1900 are co-located

Ability to use the 850 MHz MVER to verify the 1900 Handoff
1900
850
1900
MVER
MVER
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850
850 to 1900
Hand off
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
1900
850 to 1900
Hand off
850
1900
1900
850
MVER
MVER
MVER
MVER
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850
850
Border Issues
800 MHz buffer zone with
1900 co-located sites
800
1900
800
800
800
800
1900
1900
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800
800
800
Using SSSUF in the Border Areas
Standard
1900 layer
SSSUF= x dB
SSSUF=x+10 dB
850 layer
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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
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1900 coverage for the
verification device

Only when range is noise limited,
i.e. rural sites.

Urban sites is usually C/I limited.
Network Support
1900 MHz DTC
ACELP Codec
MSC
(TDMA/
136.0)
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)
IS-41.C or lower/MTUP
MSC
(Other vendor
MSC with
level of
functionality
< TDMA/136.A)
MSC
(IS-54.B)
1900 MHz to 1900 MHz
1900MHz 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 + TSB76 (PCS Multi-Band Support)
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MSC
(TDMA/
136.A)
Standard Support

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.
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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
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