141174732 Smartphones and Network Signalling Load 20110927

Smartphone and network signaling load Bandung

September 22nd – 23rd , 2011

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Packet Data Transfer States

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UTRA RRC state transitions T1 >200 mA

DCH/HSDPCH

Inactivity timer

6 msgs

6 msgs

T2 Cell_FACH

>100 mA 30 signaling messages (2 s)

12 signaling messages (0). 11 feature © Nokia Siemens Networks and Network Signalling Load/ Atinan Tumsatan

RAN2136 Fast Dormancy is activated

RAN2136 Fast Dormancy Functional Description (1/2) DCH/HSDPCH

>200 mA

3GPP R7 or earlier UEs Inactivity timer

>100 mA

Cell_FACH

Inactivity timer

PCH

< 5 mA < 5 mA

Idle

Inactivity timer

UE sends SCRI SCRI = Signalling Connection Release Indication

DCH/HSDPCH

>200 mA >100 mA

3GPP R8 or later UEs

Inactivity timer

Cell_FACH

Inactivity timer

UE sends SCRI

< 5 mA

< 5 mA

Idle

Idle

PCH

Inactivity timer

SCRI with the cause value “UE Request PS Data session end”

The UE sends SIGNALLING CONNECTION RELEASE INDICATION message with "Signalling Connection Release Indication Cause“ with the cause value UE Request PS Data session end to the RNC. The RNC receives the message and starts immediately the UE state change from Cell_DCH to Cell_PCH or URA_PCH state. 12

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Idle

RAN2136 Fast Dormancy Functional Description (2/2) • There is a new UE Signalling Connection Release Indication Cause value in SIGNALLING CONNECTION RELEASE INDICATION message. This new cause is UE Request PS Data session end and it indicates to the network that the UE has concluded active PS data transfer. • When the RNC receives the cause value, it starts immediately the UE state change from Cell_DCH state to Cell_PCH or URA_PCH state by sending RADIO BEARER RECONFIGURATION message to the UE.

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RAN2136 Fast Dormancy Signalling messages needed vs. RRC states

From Idle_mode to Cell_DCH From Cell_PCH to Cell_DCH

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RRC 12 5

Number of messages NBAP RANAP 5 7 3 0

ALCAP 6 4

RAN2136 Fast Dormancy Requirements Software Requirements

Network Hardware Requirements

• This feature does not require any new or additional HW. Interdependencies between Features

• PCH states have to be supported in the RNC before the Fast Dormancy feature can be activated.

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RAN2136 Fast Dormancy Parameters

Parameter settings • There’s no parameter to enabled/disable Fast Dormancy in RU20. It’s possible in RU30. • Cell_PCH state is prerequisite for Fast Dormancy to be activated ([RNC] MSActivitySupervision > 0).

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Blackberry

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RAN2136 Fast Dormancy Test results from Live network

BB Torch 2

Cell_PCH & NCFD are Activated

Cell_DCH

Cell_PCH

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UE setting: use Default (Rel8) Fast Dormancy

RAN2136 Fast Dormancy Test results from Live network

BB Torch 2

Cell_PCH & NCFD are Activated

Cell_DCH

Idle

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UE setting: Use Rel99 Fast Dormancy

iPhone 4 iOS 4.3

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Log file

RAN2136 Fast Dormancy Test results in Test Bed

iPhone 4 iOS 4.3.5

Cell_PCH & NCFD are Activated

Cell_FACH

Cell_PCH

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RAN2136 Fast Dormancy Test results in Test Bed

iPhone 4 iOS 4.3.3

Cell_PCH & NCFD are Deactivated

Cell_FACH

Idle

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Log file