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Smart Resource Adaptation 

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Up to 5 fold smart device userswith SRA by adaptingresources to the need

Allocation of RTSL based onMS multi slot capability

Network optimized for

PS throughput

Reduce Multi slot Blocking

Less PS territory upgrades

Increase PS throughput

SRA(Smart Resource Adaptation)

Data volume

 

Size of packet250B

web

Up to 5 TSL1 TSL

chat 

About half of the data traffic isbased on small packets (<250B)

SRA

1 user only Five users

Network optimized for smartdevices

From throughput optimized to Smartphone optimized network

More Users with Same Resources

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• Smart Resource Adaptation feature allocates radio timeslots 

according to the actual need.

• This reduces blocking and frees data traffic channels for applications

that require high throughput.

• PCU assigns packet radio resources more efficiently,

resulting in up to five times higher GSM radio network efficiencyfor applications that generate small packets.

Feature in brief

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• SW Requirements: RG10 MP9.1

• HW Requirements: PCU2

Requirements

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• Reduced multi-slot blocking and hard blocking

• Increases the network efficiency as less radio resources are reserved

for signaling type of traffic.

• Lesser PS territory upgrade

• Lower multiplexing

• Smart Resource Adaptation will not only solves the TBF blocking and

PS territory expansion issues but will also result into better spectral

efficiency for PS in the network with dominating short transactions dueto typical smart phone services

Feature benefits

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• Request of Timeslot distribution

• DLMS(Downlink Multislot Assignment Success Rate)• Data Payload

• GPRS_TER_DOWNGRADE_REQ

• %GPRS territory upgrade reject due to PCU

• EDGE Throughput per RTSL ( Throughput per TS to be monitored since

throughout per TBF will degrade after SRA since we are calculating, EDGE

throughput per TBF = Avg RTSL allocated per TBF * RLC throughput per

RTSL. As Avg RTSL allocated per TBF will reduce, so EDGE Throughput

per TBF KPIs will degrade.

• EDGE throughput per TBF

• Peak_reserved_pcupcm_ch_pcu2_E

• %DL rejection due to EDAP size•  Voice

KPI’s to be monitored - Feature impact analysis

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Feature impact analysis

Feature impact How to measure

SRA usage - to verify SRA impact on network

performance first the level of SRA usage shall be

monitored. This can be done in terms of:

- portion of new TBFs established with SRA

- portion of single slot SRA allocation converted to

multislot

New KPIs:

SRA_USAGE

CONVERSION_RATE_SRA_TO_MULTISLOT

Higher percentage of 1TSL requests and higherpercentage of 1 TSL allocation  – SRA activationshould results in increase of percentage in 1 TSLrequests and 1TSL allocation

KPIs: Distribution of DL multislot requests (msl_2c)

for 1 TSL

Distribution of DL multislot allocations (msl_4c)for 1 TSL

Counters:

072039 REQ_1_TSL_DL..

.. 072042 REQ_4_TSL_DL

072043 REQ_5_8_TSL_DL

072049 ALLOC_1_TSL_DL

.. 072052 ALLOC_4_TSL_DL

072053 ALLOC_5_8_TSL_DL 

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Feature impact analysis

Feature impact How to measureLower blocking (multislot soft blocking andhardblocking) – efficent resource allocation for shortdata packets allows to reduce softblocking (not optimalTSL allocation acc. to MS multislot class) andhardblocking (TBF rejection due to lack of radioresources). 

KPIs:

DL Multislot Soft Blocking (blck_33a)

DL Mslot Allocation Blocking (tbf_16b)

Number of TBFs to be monitored – if offered traffic

is high blocking might stay the same but higher numberof TBFs can be served

Counter:

072005 NBR_OF_DL_TBF

072007 MAX_SIM_DL_TBF

Shorter PS territory  – with SRA TSLs are used more

efficient and therefore shorter PS territory is needed.

KPIs: 

Average available area level PS territory size

for nTRXs (ava_44)

Less PS territory upgrades and less HOs due to

GPRS – with SRA less TSLs are used and therefore

less PS territory upgrade requests are expected. As the

consequence less HOs due to GPRS are triggered to

release TSL(s) to be included in the new PS territory

Counter:

001174 GPRS_TER_UPGRD_REQ

004130 HO_ATT_DUE_TO_GPRS

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Feature impact analysis

Feature impact How to measureLower multiplexing - less radio resourceswasted for short data packets means moreefficent resource allocation and therefore lowernumber of users multiplexed on the sametimeslot (PDCH) in DL 

KPIs:

  Average DL TBF per timeslot (tbf_38d)

LLC Data Throughput - less resources allocatedfor short data packets means more recourcesavailable for ftp, webbrowsing and otherservices increasing throughput per TBF.However at some level of cell load the numberof served TBFs with SRA is so high thatthroughput per TBF start to decrease 

KPIs:

  Volume Weighted LLC Throughput (llc_3a)

Upgrade rejections – with SRA it is less likely thatterritory upgrade request will be rejected or servedincompletely (with lower number of TSLs thatrequested).

KPIs:

  Territory upgrade rejection rate (blck_22a) 

  Ratio of incompletely served territory upgraderequests (blck_35)

Counters:

 001176 GPRS_TER_UG_REJ_DUE_CSW_TR

001177 GPRS_TER_UG_REJ_DUE_LACK_PSW 

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Feature impact analysis

Feature impact How to measureLower PCU utilization - less radioresources wasted for short datapackets means more efficent resourceallocation and therefore lower usage ofPCU resources 

Counters:

  110000 PEAK_RESERVED_PCUPCM_CH (number of PCUresources including GPRS channels, EGPRS master and slavechannels, expressed in 16kbps PCUPCM channels)expressed

  110002 PEAK_OCCUPIED_PDTCH_DL (peak number of

simultaneously occupied PDTCHs within a measurement period.RTSL is occupied for the whole TBF duration, also when there isno transmission). 

EDAP utilization - with SRA the EDAPusage is to be observed. In somescenario it stays the same in other itmight slightly decrease if less slavechannels are assigned to PDCH fornothing. 

KPIs:

Average usage of DL Dynamic Abis Pool (dap_1a)

Counters:

 076025 EDAP_SLAVE_CH_REQUESTED_DL

 076004 PEAK_DL_EDAP_USAGE

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