Dual-cell HSDPA
Soc Classification level
1
Nokia Siemens Networks
Author Ahmed Hakiem / Date 10 Dec 2015
Introduction
Dual Cell allow 2 adjacent channels to be combined
to generate an effective HSDPA channel bandwidth
of 10 MHz
Dual Cell Approach
Soc Classification level
2
Nokia Siemens Networks
Author Ahmed Hakiem / Date 10 Dec 2015
DC-HSDPA Principles
DC-HSDPA provides greater flexibility to the HSDPA Scheduler, i.e. the scheduler can allocated resources
in the frequency domain as well as in the code and time domains
Soc Classification level
3
Nokia Siemens Networks
Author Ahmed Hakiem / Date 10 Dec 2015
Example from DT
HSDPA Throughput enhanced after DC HSDPA activated as below
Before
After
Before
Soc Classification level
4
Nokia Siemens Networks
After
Max
18400 KB/S
24955 KB/S
Aver
4932 KB/S
8768 KB/S
Author Ahmed Hakiem / Date 10 Dec 2015
DC-HSDPA: UE Cat & Requirements
DC-HSDPA & 64QAM enable DL 42 Mbps peak rates
UE categories for DC-HSDPA support: Cat. 21, 22, 23 & 24
optional feature:
requires long term RNC license for specific number of cells ( Already Installed in All RNCs )
following features must be enabled on the 2 Carriers :
HSDPA (HSDPAEnabled)
HSUPA (HSUPAEnabled)
HSDPA 15 codes (HS-PDSCHcodeset)
HSDPA 14 Mbps per User (HSDPA14MbpsPerUser)
HSDPA64QAMallowed (good channel conditions required to apply / take benefit of 64QAM CQI >= 26)
DCellHSDPAEnabled
DCellHSDPAFmcsId
Soc Classification level
5
Nokia Siemens Networks
Author Ahmed Hakiem / Date 10 Dec 2015
DC-HSDPA & LCG
DC
HSDPA
2 LCG
1 LCG
DC HSDPA Enabled after New
Splitting (must be per sector
not per carrier)
Soc Classification level
6
Nokia Siemens Networks
DC HSDPA Enabled Direct after the
previous Features enabled without
any other action
Author Ahmed Hakiem / Date 10 Dec 2015
DC HSDPA Activation On 2 LCG
We must make LCG Splitting per Sector
I.
To make LCG Splitting ( 2 HSDPA & HSUPA PSs or more ) must be in The site
II. each cell belonging to the same sector must be in The Same LCG & have the same Tcell value
III. We divide the Sectors in 2 LCG based on the traffic per Cell
IV. Tcell values belonging to different sectors must belong to different Tcell groups in the same LCG
Soc Classification level
7
Nokia Siemens Networks
Author Ahmed Hakiem / Date 10 Dec 2015
LCG Splitting Configuration needed to activate DC HSDPA
Parameter name
Family Name
Defination
Comment
listId
A_WBTSF_LCELGW_LCELIDLIST
Cell ID no of In LCG
Must be sorted from smallest to largest In
Every LCG from 1 to 12
lCelIdList
A_WBTSF_LCELGW_LCELIDLIST
LCR ID In LCG
Must take the same LCR ID of the cell
lCelGwId
A_WBTSF_LCELGW_LCELIDLIST
Cell group identification.
hsdpaThroughputStep
A_WBTSF_BTSSCW_HSDPASCHEDLIST
Defines the scheduler inside local cell group
Maximum throughput for HSDPA scheduler
sched
A_WBTSF_BTSSCW_HSDPASCHEDLIST
Defines the scheduler inside local cell group.
accessBbCapacity
A_WBTSF_LCELGW
Defines the access to Baseband HW capacity
for each local cell group.
Must equal shareOfHSUPALicences
dedicatedBbCapacity
A_WBTSF_LCELGW
Defines the quarantined Baseband capacity
for each local cell group
Must equal 0
shareOfHSDPAUser
A_WBTSF_LCELGW
defines how many licensed HSDPA users
belongs to certain LCG
Must equal 0
shareOfHSUPALicences
A_WBTSF_LCELGW
defines how many HSUPA licenses belongs
to certain LCG. No common pool.
Divided based on the percentage of the
traffic of the cells in every LCG
MaxNumberEDCHLCG
A_WBTS
the maximum number of E-DCH allocations in
the BTS specific local cell group
Multiply in the percentage of
shareOfHSUPALicences
Soc Classification level
8
Nokia Siemens Networks
Author Ahmed Hakiem / Date 10 Dec 2015
By default it was 3 But we Change it to 6 if
there is HSDPA PSs type 3 to reach to 42 M
DL rate
DC HSDPA Counters
M5000C329 / SUM OF ACTIVE DC HSDPA USERS WITH ONE CARRIER
M5000C328 / SUM OF ACTIVE DC HSDPA USERS WITH TWO CARRIERS.
M5000C330 / SUM OF CAPABLE DC HSDPA USERS. . . . . . . . . . . .
M5000C331 / TTI SCHEDULED DC HSDPA USER FOR PRIMARY CARRIER WITH ONE CARRIER
M5000C332 / TTI SCHEDULED DC HSDPA USER FOR SECONDARY CARRIER WITH ONE CARRIER
M5000C333 / TTI SCHEDULED DC HSDPA USER FOR PRIMARY CARRIER WITH TWO CARRIER.
M5000C334 / TTI SCHEDULED DC HSDPA USER FOR SECONDARY CARRIER WITH TWO CARRIER.
There is report already created with the above Counters
Soc Classification level
9
Nokia Siemens Networks
Author Ahmed Hakiem / Date 10 Dec 2015
Enjoy & Thank You
Ahmed Hakiem
Soc Classification level
10
Nokia Siemens Networks
Author Ahmed Hakiem / Date 10 Dec 2015
