HSPA Users in RNC

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Soc Classification level

1 © Nokia Siemens Networks Presentation / Author / Date

HSPA users in RNCTomi Vahtera

RNC Product Management

August 2008





Fixed line type of HSDPA users

•When the HSDPA service is provided as replacement for fixed line/DSL

service for Internet access, the user behavior is different compared to typicalmobile user.

– Users stay long in HSDPA state with very low background traffic (like keep alivemessaging, VPN etc.) during the time between the actual traffic bursts withhigher peak rates

– The average throughput per users is decreased and thus the number of usersin RNC level can be increased

• The operator should follow that the limits for the simultaneous HSPA users(in Cell_DCH) in RNC are not exceeded.





R99 UL bit rate allocations

•There is one common DL

resource reservation for allHSDPA users

• Additionally resources for the R99 UL traffic isdedicated for each user. Theamount of resourcesreserved depends on the bitrate.

UL bit rate affects on thenumber of HSDPA userssupported in DMPG





Optimized UL reservation

The load in DMCU from each HSDPA user depends on the

associated UL channel bit rate reservation. By optimising theUL channel reservation also the number of users can beoptimized.

The reservation for HSDPA associated UL DCH channel can be

optimized with the following RAS05.1 features: – RAN242: Flexible Upgrade of NRT DCH Data Rate

– RAN409: Throughput Based Optimization of the Packet Scheduler Algorithm

The reservation is done according to the actual throughput

need of the user. When the throughput decreases thereservation is also downgraded and thus more HSDPA userscan be supported.





Initial RAS05.1 – number of HSDPA users in RNC

•The number of supported active HSDPA users in each RNC196 and

RNC450 configurations with different associated UL capacities inRAS05.1/RN2.2 are:

64 kbit/s UL 128 kbit/s UL 384kbit/s UL

RNC196/48M 216 144 96

RNC196/85M 378 252 168

RNC196/122M 540 360 240

RNC196/159M 702 468 312

RNC196/196M 846 564 376

RNC196/300M 1080 720 504

RNC196/450M 1620 1080 756

RNC450/150M 360 252 180

RNC450/150M Carrier optimised 1 320 224 160




RNC450/300M 720 504 360

RNC450/450M 1620 1080 756





New implementation in RAS05.1ED / RN2.2 CD02

•New HSDPA configuration alternative is supported (RAN1514).

This can be used for fixed line type of users with low averagethroughputs when there are less R99 NRT data users in thenetwork.

•Implementation of this is such that all DMPG units in RNC can

be used for HSDPA traffic processing. (so called “flat HSDPASW pool”)

– Max RNC data throughput or max AMR capacity do not change

– NRT R99 data users are not prioritized anymore over HSDPA users

– Activity factor for the associated UL channels for HSDPA is assumed to

be 69 % which means that more users that have low averagethroughput can be supported.

• Originally supported HSDPA configuration is still supported aswell. HSPA SW pool type can be configured by operator.





Number of HSDPA users with “flat HSDPA pool”alternative

• The number of supported

HSDPA users in different RNC196and RNC450 configurations withdifferent UL capacities. “Flat SWpool” concept is not supported withRNC450/150 carrier/coverageoptimized configurations.

• For example in RNC450/450configuration the number of HSDPA user with 64 kbit/s UL canbe increased ~40 % compared to

the original RN2.2 HSDPA SWpool configuration.

• High increase of the users with384 kbit/s UL

RNC450/450

0

500

1000

1500

2000

2500


N u m b e r o f u s e r s

Flat HSDPA SW Pool

Original RN2.2 HSDPA SWPool


RNC196/48M 335 190 140

RNC196/85M 800 480 320

RNC196/122M 1120 670 445RNC196/159M 1870 1150 860

RNC196/196M 2285 1405 1055

RNC196/300M 2285 1405 1055

RNC196/450M 2285 1405 1055

RNC450/150M 500 285 215

RNC450/300M 1200 720 480

RNC450/450M 2285 1405 1055





RAS06/RN3.0 - number of HSPA users in RNC

•Due to the architectural optimizations in RAS06/RN3.0 the number of supportedHSPA users are increased.

•Due to the architectural changes the “flat HSDPA SW pool” configuration is notsupported anymore – only one option per configuration in the beginning

•16 kbit/s UL bit rate introduced supporting more users with low average throughput

•Full rate resource allocation is made for the first HSUPA users. Rest of the users willget half rate resource reservation.

HR FR

RNC196/48M 790 720 400 210 430 70 360 70

RNC196/85M 1580 1440 810 430 860 140 720 140

RNC196/122M 2370 2160 1220 640 1290 210 1080 210

RNC196/159M 3160 2880 1630 860 1720 280 1440 280

RNC196/196M 4090 3720 2100 1110 2230 370 1860 370

RNC196/300M 4090 3720 2100 1110 2230 370 1860 370

RNC196/450M 4090 3720 2100 1110 2230 370 1860 370

RNC450/150M 1380 1260 710 370 750 120 630 120

RNC450/150M Carrier optimised 1 1250 1140 640 340 680 110 570 110RNC450/150M Carrier optimised 2 990 900 510 270 540 90 450 90

RNC450/150M Carrier optimised 3 790 720 400 210 430 70 360 70

RNC450/150M Carrier optimised 4 520 480 270 140 280 40 240 40

RNC450/300M 2700 2460 1390 730 1470 240 1230 240

RNC450/300M Carrier optimised 1710 1560 880 460 930 150 780 150

RNC450/450M 4090 3720 2100 1110 2230 370 1860 370

RNC450/450M Carrier optimised 2310 2100 1190 630 1260 210 1050 210

FR (Full rate) = 1.45 Mbit/s or 2.0 Mbit/s

HR (Half rate) = 711 kbit/s

HSUPA

HR

HSUPA

FR

HSUPA HR + FR16 kbit/s UL 64 kbit/s UL 128 kbit/s UL 384kbit/s UL

Changedin CD1:Users notseparatedwithdifferentbit rateallocation

anymore





Dynamic HSUPA resource management

•Included in RN3.0 CD1.0

• All HSDPA users can have HSUPA inUL

•There are no static DSP resourcereservations for HSUPA. Resourcesare internally allocated based on theactual throughput need

• All HSUPA users are capable toachieve the maximum 2.0 Mbit/s peakrate if throughput is available

•No configuration needed – availablewhen CD1.0 SW level installed.





HSPA optimized configuration

•Included in RN3.0 ED2.0

•The number of HSPA usersincreased – the maximumthroughput for R99 NRT datadecreased to ~50 % from thecurrent maximum

•The maximum AMR capacity

remains in the earlier level.•HW requirements:

– CDSP-C interchangeability D

– AL2S-D for A2SU

• Optional configuration – alsothe standard optionsupported





HSPA users in traffic mix case

•The total number of HSDPA users with differentUL channels can be calculated with the following

formula:

•NRT R99 data users will have an effect on howmany HSPA users can be supported. There is nosimple rule to calculate this.

– RAS06 will bring big improvement for traffic mixcases. NRT R99 data users have very minor effecton the number of HSPA users.

– The example here is with RNC196/450configuration with example traffic mix where 50 %of the NRT R99 data users are with PS384 and

50 % with PS64 bit rates. The HSDPA users are50 % with PS384 UL and 50 % with PS64 UL.

1with ULusersof #max

with ULusersof #

typesULAll

Number of HSPA users as a function of R99 NRT data capacity

0

500

1000

1500

2000

2500

3000

2 % 4 % 1 0 %

2 0 %

3 0 %

4 0 %

5 0 %

6 0 %

7 0 %

8 0 %

9 0 %

1 0 0 %

% of max rel99 PS

# o f H S P A u

s e r s

RN2.2 normal

RN2.2 flat pool

RN3.0





Summary of DMCU resource mechanisms indifferent releases

-RAS05 static HSPA pooling

-RAS05.1 soft pooling

-RAS05.1 ED flat HSDPA softpooling

-RAS06 architecture change – functionality moved from PQ

processor to DSP-RAS06 CD1 HSUPA optimization

-RAS06 ED2 HSPA optimizedconfigurations

HSPA users in RNC196/196

0

1000

2000

3000

4000

5000

6000

7000

RAS05.1 RAS05.1 ED RAS06 RAS06 CD1

HSPA optimised

# u s e r s

ED2





DMCU resource allocations in RU10





CDSP-DH vs. CDSP-C

•New DMCU HW unit is introduced in RU10 release: CDSP-DH

•CDSP-DH is capable to handle 14 Mbit/s HSDPA peak rate per user in RU10 and further HSPA peak rate enhancements in RU20

•CDSP-DH is highly integrated solution with two powerful DSP processors per DMPG as thereare 8 DSPs per DMPG in CDSP-C

– Otherwise the HW architecture is the same as in CDSP-C

• CDSP-DH is used in RNC2600 and in RNC196/RNC450 HSPA peak rate upgrades

• CDSP-DH replaces CDSP-C in all new deliveries and extensions since RU10 release

DMCU

DMPG DMPG DMPGDMPG

ATMmux/demux

DSP0 DSP1 DSP2 DSP3 DSP4 DSP5 DSP6 DSP7

MemoryPPC

MPC

local bus

DMPG

CPM ATM

ATM to/from MXU

DMCU

DMPG DMPG DMPGDMPG

ATMmux/demux

DSP0 DSP1 DSP2 DSP3 DSP4 DSP5 DSP6 DSP7

MemoryPPC

MPC

local bus

DMPG

CPM ATM

ATM to/from MXU





DMCU resource management in RAS06

•The DMCU resource management is based on soft pooling as in RN2.2.

•In RN3.0 DSPs are dedicated either for HSPA traffic or then for other traffic. – HSPA DMPGs include both HSPA and non-HSPA DSPs ( 6 HS-DSP and 2 DCH-DSP )

– Non-HSPA (DCH-DMPGs include only non-HSPA DSPs

•HSPA (HSDPA and HSUPA) optimized DSP code is used in those DSPs that are allocated for HSPA usage. Only HSPA services can be allocated on those

• Additionally SW architecture change is made: RLC processing is moved from PQ2 to DSPs.

This allows more processing capacity per DMPG.

DCH _ DSP

DCH _ DSP

DCH _ DSP

DCH _ DSP

PQ 2

HS _ DSP

HS _ DSP

DMPG

DMPGDMPG

HS _ DSP

HS _ DSP

DCH _ DSP

DCH _ DSP

DCH _ DSP

DCH _ DSP

PQ 2

DMPG

DMPGDMPG

DCH _ DSP

DCH _ DSP

DCH _ DSP

DCH _ DSP

DCH- DMPGHS- DMPG

HS _ DSP

HS _ DSP

DCH _ DSP

DCH _ DSP

PQ 2

HS _ DSP

HS _ DSP

DMPG

DMPGDMPG

HS _ DSP

HS _ DSP

DCH _ DSP

DCH _ DSP

DCH _ DSP

DCH _ DSP

PQ 2

DMPG

DMPGDMPG

DCH _ DSP

DCH _ DSP

DCH _ DSP

DCH _ DSP

DCH- DMPGHS- DMPG





DMCU resource management in RU10

DCH _ DSP

DCH _ DSP

DCH _ DSP

DCH _ DSP

PQ 2

HS _ DSP

HS _ DSP

DMPG

DMPGDMPG

HS _ DSP

HS _ DSP

HS- DMPG

HS _ DSP

HS _ DSP

DCH _ DSP

DCH _ DSP

PQ 2

HS _ DSP

HS _ DSP

DMPG

DMPGDMPG

HS _ DSP

HS _ DSP

HS- DMPG

PQ 2

HS _ DSP

DMPG

DMPG

DMPG

HS- DMPG

PQ 2

HSDSP

DMPG

DMPG

DMPG

HS- DMPG

HS _ DSPHS

DSP

CDSP-DHCDSP-C

•If no CDPS-DH upgrade is made the DMPG pooling in RU10 in RNC196 and RNC450 is thesame than RAS06 implementation

•When CDSP-DH (HSPA 14 Mbit/s peak rate per user) upgrade is made the HSPA pool issplitted to two parts:

– CDSP-C units: users with maximum HSDPA peak rate capability up to 10 Mbit/s are allocated first here

– CDSP-DH units: users with maximum HSDPA peak rate capability more than 10 Mbit/s are allocatedfirst here

– When either of the pools becomes full, other pool will be used for all users

– DCH-DMPG pool is used as earlier in RAS06

RNC196 &

RNC450





Preliminary number of HSPA users inRNC196 & RNC450

•When no CDSP-DH upgrade is

made, the number of HSPAusers is the same as in RAS06

RU10





Preliminary number of HSPA users inRNC196 & RNC450

•The number of HSPA users in

RNC196 and RNC450 whenCDSP-DH upgrade is made

• About 50-65 % of the users areallocated to the CDSP-DH pooland rest of the users areallocated in the CDSP-C pool

– Users in CDSP-DH pool arecapable for achieving 14 Mbit/sDL peak rate

– Users in CDSP-C pool arecapable for achieving max 10

Mbit/s DL peak rate

RNC196 configuration384 kbit/s 128 kbit/s 64 kbit/s 16 kbit/s HSUPA

48 550 1260 1700 1700 2340

85 760 1690 2480 2490 3020

122 1030 2540 3700 3700 3700

159 1230 3390 4380 4380 4380

196 1430 3890 5060 5060 5060

300 1870 4720 6790 6820 7030

450 1880 5520 7710 7740 10300


150

Standard 1050 2420 3200 3210 4490

150

Carrier optimized 1 1010 2340 3070 3070 4350

150


150


150


Standard 1460 3970 5420 5440 7360

300

Carrier optimized 1740 3970 5420 5440 7360450

Standard 1880 5520 7710 7740 10300

450

Carrier optimized 1970 4580 5950 5950 8510

Number of HSDPA users

Associated UL channel



RU10





RNC2600 DMPG resource management

•In RNC2600 there is no separate DMPG pool for HSPA and DCH traffic. AMR, R99 data and

HSPA are allocated to the same DMPG/DSP units

•There are dedicated DSPs for common channel processing. The CCH-DSPs are distributedamong different DMGPs and DMCUs to provide the best possible redundancy

DMPG

PQ2

HS _ DSPDCH

DSPHS _

DSPDCH

DSP

DMPG

PQ2

HS _ DSPDCH

DSPHS _

DSPCCH

DSP

DMPG

PQ2

HS _ DSPDCH

DSPHS _

DSPCCH

DSP

CCH: common channel processing

DCH: HSPA + R99 processing


step 1 2600 6500 8900 8900 13800

step 2 3900 10000 13900 13900 21500

step 3 5100 13500 18700 18700 29200



HSPA Users in RNC

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