c11 best effort traffic control algorithm

8/10/2019 C11 Best Effort Traffic Control Algorithm

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0 2014/12/1 Huawei Profile

Best Effort Traffic Control Algorithm

2004-03


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DCCC

Link Quality Check

UE State Transitions


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DCCC

Why DCCC What is DCCC

How to DCCC


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Why DCCC

Uu code resource is limited

Iub/Iu band resource is limited

3G best effort traffic attribute


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What is DCCC

DCCC: Dynamic Channel Configuration Control aim: make full use of radio resource (also Iub/Iu)

- Conf igured bandwidth is f ixed when no DCCC

- Conf igured bandw idth is changing when DCCC

- Traffic rate

Ra

teorband


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How to DCCC

Measurement report

DCCC decision

Traffic Volume measurement

control

UE and RNC Measurement

DCCC execution


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Traffic Volume Measurement

Threshold

Transport

Channel

TrafficVolume

Reporting

event 4A

Time

Reporting

event 4A

Threshold

TransportChannel

Traffic

Volume

Reporting

event 4B

Time

Reporting

event 4B

Reporting

event 4B



Measurement Parameters

Traffic volume measurement

4a

Threshold

Time to trigger

Pending time after trigger

4b

Threshold Time to trigger

Pending time after trigger



DCCC decision

If DCCC switch is on,initial rate is fullcoverage rate

When 4a event -> increase bandwidth

When 4b event -> decrease bandwidth Set DCCC threshold,if current

bandwidth



DCCC execution

UL/DL bandwidth adjustment by RB reconfiguration

Uu Iub

UE-RRC UE-MACUE-RLC UE-PHY NodeB-PHY RNC-MAC

CMAC-MEASUREMENT-REQ

DCCH: MEASUREMENT CONTROL Message[Traffic Volume Measurement]

MAC-DATA-REQ

MAC-DATA-REQ

CMAC-MEASUREMENT-IND

DCCH: MEASUREMENT REPORT Message

[Traffic Volume Measurement]

Thresholdexceeds

Decide toreport

RNC-RLC RNC-RRC

Choose Action

accordingly

Radio Bearer Control Procedures

[Bearer Reconfiguration / Transport Channel Reconfiguration / Physical Channel Reconfiguration / Transport Format Combination Control

BCCH: System Information Message[Traffic Volume Measurement]

MAC-DATA-REQ

ReportInterval


ReportInterval




DCCC

Link Quality Check




Why Link Quality Check

Because of DL code and power resource is limited,high bit

rate traffic such as 384k cant covered somewhere,if the UEmove to this place the call will drop.Using Link Quality

Check,the PS traffic can be covered continuously as following.

Data of 144kbps

Data of 64kbps

Voice

Data of 384kbps



How to Link Quality Check

Measurement report

Link Quality Check decision

DL Transmitted Code Power

measurement

NodeB Measurement

RB Reconfiguration

execution



DL Transmitted Code Power Measurement

T1T1

Measuredentity

Time

MeasurementThreshold 1

MeasurementThreshold 2

T1 Measurement Hysteresis Time

T1

Report A Report BPeriodic

Reports

Report A Periodic

Report

Measurement Reports



Tx Code Power Measurement Parameter

Event E Ea relative threshold

Eb relative threshold

filter coefficient hysteresis time

report period



Link Quality Check decision and execution

If DL Transmitted Code Power event Ea istriggered,decreasing DL bandwidth and

start a timer when DCCC switch is off .

If the timer elapses,resume the bandwidth.



DCCC

Link Quality Check





Establish RRC

Connection

Release RRC

Connection

UTRA RRC Connected Mode

UTRA:Inter-RATHandover

GSM:Handover

Establish RRC

Connection

Release RRC

Connection

URA_PCH CELL_PCHGSM

Connected

Mode

Establish RR

Connection

Release RR

Connection

Idle Mode

Camping on a UTRAN cell1 Camping on a GSM / GPRS cell1

GPRS Packet Idle Mode1

GPRS

Packet

Transfer

Mode

Initiation of

temporary

lock flow

Release of

temporary

lock flow

Cell reselection

CELL_DCH

out ofservice inservice

CELL_FACH

out ofservice

inservice

out ofservice

inservice



Why UE state transitions

Save radio resource

Save UE power and battery


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CELL_PCHURA_PCH

If in a given period the times of CELL

Update reason which is cell reselect

reaches a configured threshold,

doing CELL_PCH URA_PCH


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c11 best effort traffic control algorithm

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