gsm training materials for special subjects--optimization of ps radio parameters_r2.0

7/25/2019 GSM Training Materials for Special Subjects--Optimization of PS Radio Parameters_R2.0

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Optimization of PS Radio Parameters

Suitable for staff with P&O skill certificate IV

Issued by GSM Product Support ept!

GSMGSMTraining Materials forTraining Materials forSpecial SubjectsSpecial Subjects


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Confidential

Version IntroductionVersion Date Writer Assessor Translator Amendment Records

V1.0 2009-06-30 Hou Shuai hen! Hao "one

V2.0 2009-11-13 Hou Shuai hen! Hao #en! $iao%in!&u 'anWan! Han!%an

Rele(ant )S *arameters o+V6.20.100 series are added.

V3.0 2010-01-1, Hou Shuai hen! Hao #en! $iao%in!&u 'anWan! Han!%an

1 Rele(ant )S *arameters o+V6.20.200 series are added

2 The introduction to)DTH allocation al!orithm

/ased on the idle threshold o+TR$ is added.

V1.3 2010-03-31 Hou Shuai Zheng Hao #en! $iao%in!&u 'anWan! Han!%an

The o*timiation o+ResourceAdustThs is modi+ied

V2.0 2010-07-21 Hou Shuai Zheng Hao #en! $iao%in!&u 'anWan! Han!%an

The o*timiation o+ nter(alnum/er o+ )acetDo4nlin5*lin Ac5"ac7T8#:ST7 and T31925T3193 is

modi+ied.

"his material contains information about research & de#elopment trend

of $"% orporation' and is open only to internal employees(


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ourse Ob)ecti#es

This material classifies radio parameters

related to PS service according to functional

modules, and describes in detail the

following aspects: the principle of

parameters, application context of functions,

suggestions for network P& ad!ustment,

and etc" #t is hoped that this ma$ be helpful

to dail$ work in network planning and

optimi%ation"#mportant Statement:

Please be informed that functions such as CC', PS

preemption()ueuing, P*C, P+CC, C-.(-/, and PS power

control, etc" are not mature in development, and therefore will not

be described in this PPT0


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ContentsChapter 1 Introduction to Coding Mode Adjustment Algorithms

ha*ter 2 ntroduction to &in ;ualit% ontrol #unction

ha*ter 3 ntroduction to & T8# Access ntroduction to #unctions7 Timers and ounters Related to T8#

:sta/lishment ? Release

ha*ter 6 ntroduction to :DA and Al!orithms o+ &5D& Timeslot Allocation

Decision

ha*ter @ ntroduction to ell Reselection Al!orithms 8ased on 1 ? 2

ha*ter , ntroduction to 8V ?


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Classifications of coding mode

#nitial coding mode and its d$namic ad!ustment

12P'S phone )ualit$ measure mode

#nterval number of Packet 3ownlink(4plink

5ck(ack

5verage filter period for +1P4plink measure report period

Introduction to odin* Mode +d)ustment

+l*orithms


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lassifications of codin* mode

Modulat

iveMode

Codingscheme

modulation

RLC

Blks/Radio Blk

FEC

CodeRate

User

bits/20ms

bit Rate(bs!

Famil"

GPRS

CS-1

GMSK

1 0.45 160 8,000 -

CS-2 1 0.65 240 12,000 -

CS-3 1 0.75 288 14,400 -

CS-4 1 1 400 20,000 -

EGPRS

MCS-1 1 0.53 176 8,800 C

MCS-2 1 0.66 224 11,200 B

MCS-3 1 0.85 296 14,800 A

MCS-4 1 1 352 17,600 C

MCS-5

8-PSK

1 0.38 448 22,400 B

MCS-6 1 0.49 592 29,600 A

MCS-7 2 0.76 448+448 44,800 B

MCS-8 2 0.92 544+544 54,400 A

MCS-9 2 1 592+592 59,200 A


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Initial codin* mode and its dynamic ad)ustment,V-!./!0//e and later #ersions1

Parameter 2ame,21

Parameter2ame ,%21

Parameter ode

Ran*e & 3nit$"%

efault

Cn Cn Cn .66,789 ;< n n n 6 = /n >n >n 6 = .66,789 / mode holding time 3rxTimeEax6, ., /, A, ;, .@, -/, @A,s /

3efinition: #t configures the maximum duration for ES to implement nonN3'> mode when ES enters packet idle modefrom packet transmission mode" hen ES enters packet idle mode from packet transmission mode, it needs to keep nonN

3'> mode for a period of time" hen T+* is released, with the nonN3'> mode, ES will monitor all the CCC blocks and

PC4 will reserve the context related to ES"

hen PCCC channel is not configured for the network, with the nonN3'> mode, the J#mmediate assignment

commandK can be sent on all PC and 52C channels and the process onl$ lasts for do%ens of ms" owever, with the

3'> mode, ES can onl$ monitor the paging messages within the paging group it belongs to" Then the message ofJimmediate assignment messageK is received b$ all the paging blocks and 52C reserved blocks" +esides, the process for

receiving the paging message lasts for a relativel$ long time 8#t is related to the configuration of some parameters like the

number of multiframes of paging channel and the number of reserved blocks of 52C"

owever, with the nonN3'> mode, the power consumption of the batter$ is increased"

#n general, it is suggested that the configuration of the parameter should be larger, for example, A @s"

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2A0/052A0/A52A0/?5"A0-;5"A0;?

ounter escription of functions

-.6. *or a 4S*, if the network receives correct data form a specified uplink block, -.6. clears for that T+*" #f thenumber of losses in specified uplink block exceeds -.6.8-.6.max, then T-.@G timer starts" The network usesthe T*# and 4S* resources when T-.@G stops"

-.6- hen the last P5C1T 4PL# 5C(5C message 8*5#. of a T+* is sent, -.6- is reset" #f the P5C1TCT'L 5CL1321E1T message is not received b$ the specified block of the network side, -.6- willhave an increment and sent the P5C1T 4PL# 5C(5C again" #f the counter -.6- exceed the limiting-.6-max, the network will start T-.@G" The network uses T*# and 4S* resources when T-.@G stops"

-.6< 3uring the packet downlink transmission, +SS will configure ''+P domain on downlink 'LC data block at setintervals so as to notif$ ES to send the J'LC(E5C controlK message on corresponding uplink blocks 8e"g", Jpacketdownlink confirmationK message and the like" *or a T+*, if the number of losses of J'LC(E5C controlK message inspecified uplink block exceeds -.6< 8-.6


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2A0/.

Parameter

2ame ,21

Parameter 2ame

,%21

Parameter

code Ran*e & 3nit

$"%

efault

-.6/ z{ -.6/ decrease step Pan3ecA # ; # ./ # .@ # /6 # /A #/; # -/

A

-.6/ |{ -.6/ increase step Pan#ncA # ; # ./ # .@ # /6 # /A #/; # -/

;

-.6/ }~ -.6/ Eax PanEaxA # ; # ./ # .@ # /6 # /A #/; # -/

-/ hen ES detects the stall condition of the window 8H8S H85 U S, ES will start T-.;/" hen P5C1T

4PL# 5C(5C is received, which enables H8S Y H85 U S, T-.;/ stops" hen T-.;/ expires, ES will

subtract Pan3ec from -.6/ , and will implement the abnormal release of the T+* and make it accessed and

have a retr$" hen ES receives the P5C1T 4PL# 5C(5C message from the network which allows the

increase of H8S or H85, ES will add Pan#nc to -.6/" owever, -.6/ can not exceed the value defined b$

PanEax" hen -.6/X6, ES will implement the abnormal release of the T+*, and will trigger the cell reselection"

#f the configuration of Pan3ec % Pan#nc and PanEax is 6, -.6/ is invalid"

The configuration of T-.;/ is fixed, that is


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"[email protected]"A0>.

"imer 9unction Start Stop "imeout

p31W2

Wait +or the time to initiatene4 *acet access a+ter


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Sin*le 6lock +ssi*nment Offset

Parameter2ame ,21

Parameter 2ame ,%21Parameter

odeRan*e &

3nit$"% efault

C Single +lock 5ssign ffset S+5ssffset @=./,block .6

#n H@"/6".66e and later versions, this parameter, which is fixed in the s$stem of previous versions, is

visible on the 1ES interface" The RT1 default value .6 is used when this parameter is not enabledI#t is used to define the single block assignment offset allowed in the first single block assignment in

two phase access"

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PO77I2G Retry "ime

Parameter 2ame,21

Parameter 2ame,%21

Parameterode

Ran*e &3nit

$"% efault

PLL#2 D Polling 'etr$ Time Polling'etr$Time -=./ F

#n H@"/6".66e and later versions, this parameter, which is fixed in the s$stem of previous versions, is

visible on the 1ES interface" The RT1 default value F is used when this parameter is not enabledI#n some versions before H/, this parameter was enabled sometimesI#t defines, when polling has not been received b$ ES after it was sent out b$ network, the maximum

number of sending pollingsThis parameter should be set a higher value in order to improve the abnormal T+* failure rate"

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Rele#ant parameters

ate*oryParameter 2ame

,21Parameter 2ame ,%21

Parameterode

Ran*e & 3nit$"%

efault

SU ee \],=@T+* Support signal extendeduplink T+*S#25LB14T+* es(o o

SU ee j?@yT+*

yT+* release time ofdownlink transmission T-.G- 6 = @


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Rele#ant parameters

ate*oryParameter2ame ,21

Parameter2ame ,%21

Parametercode

Ran*e & 3nit$"%

efault

Ue ee -.6/ z{-.6/ decreasestep

Pan3ecA # ; # ./ # .@ # /6 #/A # /; # -/

A

Ue ee -.6/ |{ -.6/ increase step Pan#ncA # ; # ./ # .@ # /6 #/A # /; # -/

;

Ue ee -.6/ }~ -.6/ Eax PanEaxA # ; # ./ # .@ # /6 #/A # /; # -/ -/

Ue ee3'> wxyA

3'> mode holdingtime 3rxTimeEax 6, ., /, A, ;, .@, -/, @A, s /

Ue ee T-.G/ T-.G/ T-.G/


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ContentsChapter . #ntroduction to Coding Eode 5d!ustment 5lgorithms

Chapter / #ntroduction to Link Mualit$ Control *unction

Chapter - #ntroduction to 4L T+* 5ccess Eode

Chapter A #ntroduction to indow in 3ata TransmissionChapter < #ntroduction to *unctions, Timers and Counters 'elated to T+* 1stablishment &

'elease

hapter - Introduction to %+ and +l*orithms of 3757 "imeslot +llocation ecision

Chapter F #ntroduction to Cell 'eselection 5lgorithms +ased on C. & C/

Chapter ; #ntroduction to +HC & ES *low Control 5lgorithms

Chapter G #ntroduction to 3TE & Paging Coordination *unction

Chapter .6 #ntroduction to 5CC *unction

Chapter .. #ntroduction to Suspend('esume *unctions

Chapter ./ #ntroduction to *unctions & 5lgorithms #nfluencing P3TC Planning

Chapter .- #ntroduction to Parameters of P3TCVTC Conversion

Chapter .A #ntroduction to PreemptiveTrans +it *unctionChapter .< #ntroduction to CS Eove *unction

Chapter .@ #ntroduction to 2ranularit$ for 4L +lock 5llocation of 2P'S andset

Chapter .F #ntroduction to Parameters of Eaximum 4L(3L 4sers 5llowedChapter .; #ntroduction to 'elevant Poc ParametersChapter .G Muick Search for PSNrelated 'adio Parameters


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+d#anta*es of %+

S#

S#

S#

PDC

1

PDC

2

PDC

!

PDC

"

PDC

#

PDC

$

PDC

%

PDC

&

PDC

&

PDC

1

PDC

2

PDC

!

PDC

"

PDC

#

PDC

$

PDC

%

PDC

&

PDC1

PDC2

PDC!

PDC"

PDC#

PDC$

PDC%

PDC&

PDC

1

PDC

2

PDC

!

PDC

"

PDC

#

PDC

$

PDC

%

DL

DL

'L

'L

Dynamic Allocation

()tend Dynamic Allocation

ote: #t is onl$ supported b$terminals of 'A or higher"

5s to d$namic allocation, each uplink

P3C should have a corresponding

downlink P3C to schedule it"

Therefore, the number of uplink P3C

should be no more than that of downlink

P3C" #n this case, some defects exist

for those services which mainl$ center

around uplink services 8e"g", uploading,

sending 1E5#L and so on"

#t is supported b$ extend d$namic

allocation that one downlink P3C can

schedule several uplink P3C" #n this

case, it can better support the services

which center around uplink services"

#t is suggested that this function should

be enabled"


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Introduction to al*orithms of 3757 timeslot

allocation decision

initial "Sallocated, for 2on P9

MS1

+d)ust riteria ,37: 37 data flowH 7: 7 data flow1

37 7 J B "D 37 7 K"D

37 C 7 JB"D5@L37 7L K "D5@ 7 C 37 JB

"D5@C

Principle 0d 0u37 "S: Ma Introduction to ell Reselection +l*orithms 6ased on 0 & .

Chapter ; #ntroduction to +HC & ES *low Control 5lgorithmsChapter G #ntroduction to 3TE & Paging Coordination *unction





Chapter .A #ntroduction to PreemptiveTrans +it *unction

Chapter .< #ntroduction to CS Eove *unction



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I t d ti t ll l ti l ith


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#ntroduction to algorithms of cell reselection

decision before and after the read$ state#ntroduction toattached reselection parameter

indication

'elevant parameters

Introduction to cell reselection al*orithms

based on c0 & c.

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I t d ti t l ith f ll l ti


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Introduction to al*orithms of cell reselection

decision before and after the ready state

Cellreselectionthreshold

C/UC'

C.UC'NT1?8PTNTUC' hen PTY@A6

or

C.NC'UC' hen

PT@A6

'>L1HN'>L1HB5CC1SSBE#NE5>8ESBT>P'BE5>BCCNP,UC'NT1?8PTNTUC'hen PTY@A6or'>L1HN'>L1HB5CC1SSBE#N

E5>8ESBT>P'BE5>BCCNP,NC'UC'hen PT@A6

*or terminals which are not at read$ state 8that is at standb$ state of CS, under the same L5,

reselection will not be triggered until C/ of the nonNserving cell surpasses C/ of the serving cell for 8value:6=.@? 5bis bandwidth 81321:AI

2P'S: /?.66(8number of PS subscribers on a T'>U.(number of useable timeslots

Points for attention in settin* "r


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p

Parameter 2ame,21

Parameter2ame ,%21

Parameterode Ran*e & 3nit $"% efault

\] PS CS Support PS Prmp CS PSPrmpCSSupport es(o o

()y 3$namic ts es(o es

,GjPs Service Preferencepropert$

o preference, 2P'Spreference, 1321preference, 1321specialt$

o preference

P3C P3C Priorit$ P3CPrecedence es(o o\],G

Support of subscriberoccup$ing otherpreference channel

$bridccuSupp es(o es

\],G

Support of PSsubscriber moving out ofother preferencechannel

5llowPsEove es(o o

~Congeneric servicethreshold for PSNmoving SfPrefer+us$Ths 6=.66, 78 .66

~4nNcongeneric servicethreshold for PSNmoving pPrefer+us$Ths 6=.66, 78 6

PS ~ T'> PS bus$ threshold TrxPS+us$Ths8Y . = @A66 G66

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Contents


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Chapter . #ntroduction to Coding Eode 5d!ustment 5lgorithms




'elease

Chapter @ #ntroduction to 135 and 5lgorithms of 4L(3L Timeslot 5llocation 3ecision







hapter 0A Introduction to Parameters of P"D"D on#ersion




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Introduction to Parameters of P"D"D on#ersion


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Parameter2ame ,21

Parameter2ame ,%21

Parameterode

Ran*e & 3nit$"%

efault

CS ,GD

Einimal number ofidle CS channel CsChansThs 6 = /


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hapter 0@ Introduction to Preempti#e"rans 6it 9unctionChapter .< #ntroduction to CS Eove *unction



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Introduction to Preempti#e"rans 6it 9unction


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Parameter2ame ,21

Parameter 2ame,%21

Parameter ode Ran*e & 3nit $"%efault

Take ^Preemptivetransbit^ function Preemptive'ans es(o o

#f this function is supported b$ the cell, through the field of P'1B1EPT#H1BT'5SE#SS#

of P5C1T 4PL# 5C(5C message, the network can indicate whether the handset cansend the 'LC data of P13#2N5C when there are no 5C state data and no new 'LC

data blocks need to be sent, or when the send window is full"#f the function of preemptiveTrans

bit is enabled, the throughput can be improved to some extent"

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Contents


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Chapter .A #ntroduction to PreemptiveTrans +it *unctionhapter 0? Introduction to S Mo#e 9unction



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Introduction to S Mo#e 9unction


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Parameter2ame ,21

Parameter 2ame ,%21Parameter

odeRan*e & 3nit

$"%efault

\] CS

Support of CS subscribermoving 5ccess Persist Level

5llowCsEove es(o o

#n theor$, if this function is enabled, it can largel$ prevent subscribers of voice service

from occup$ing the d$namic P3TC channel" owever, at present, if this function is

enabled, the indicators like handover and call drop will be greatl$ influenced" So it is

suggested that it should not be enabled"

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Contents


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Chapter A #ntroduction to indow in 3ata Transmission

Chapter < #ntroduction to *unctions, Timers and Counters 'elated to T+* 1stablishment &

'elease



Chapter ; #ntroduction to +HC & ES *low Control 5lgorithmsChapter G #ntroduction to 3TE & Paging Coordination *unction






hapter 0- Introduction to Granularity for 37 6lock +llocation of GPRS Dandset


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Introduction to Granularity for 37 6lock +llocation

f GPRS D d t


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of GPRS Dandset

Parameter2ame ,21

Parameter2ame ,%21

Parameterode

Ran*e & 3nit$"%

efault

2P'S =@C

y

Selective

granularit$

4S*2ranularit

$

6 = .86: uplink block allocation

granularit$ is .I .: uplink blockallocation granularit$ is A

6

#t is sent to the handset in P5C1T 4PL# 5SS#2E1T message" #t indicates that when the cell adopts

the media control method of Jd$namic allocationK, the network will allocate uplink block granularit$ to the

2P'S handset"

5 smaller configuration can avoid the waste of resources"5 smaller configuration can make the allocation of resources more flexible"#f A granularities, which are not continuous, are chosen to be allocated at one time, the allocation will fail"

Therefore, it is suggested that the configuration of this parameter should be 6, and each time one

granularit$ should be allocated to subscribers"

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Contents


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hapter 0> Introduction to Parameters of Ma


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3sers +llowed

Parameter 2ame,21

Parameter2ame ,%21

Parameter ode Ran*e & 3nit $"%efault

y}PS =@D

Eaximum PS uplinkuser per ts EaxPs4serPerTsB6 / = ; A

y}

PS ?@D

Eaximum PS

downlink user per tsEaxPs4serPerTsB. / = .@ @

To guarantee that there is no artificial constraint on 4S* high limit and T*# high limit on a P3C"

So these two parameters are open" 5 low rate can be allowed" owever, it can not be allowed that

resources are available but subscribers can not have the access because of human factors" #t issuggested that the configuration of uplink is F, and the configuration of downlink is .@ or a little bit

lower"

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Contents


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Chapter .F #ntroduction to Parameters of Eaximum 4L(3L 4sers 5llowedhapter 0= Introduction to Rele#ant Poc Parameters

Chapter .G Muick Search for PSNrelated 'adio Parameters

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Introduction to Rele#ant Poc Parameters


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The parameter Jptimi%ed PoC service supportK is used to control the following five parameters:

PSC5P5TSB4L, PSC5P5TSB3L, Poc5ttSeltB6, Poc5ttSeltB., and PocSrcThs" nl$ when it is set asJesK could relevant Poc optimi%ation parameters work"

The parameters JEaximal users of PC service on shared PS channel 6K and JEaximal users of PC

service on shared PS channel .K are used to define maximum number of users of the Poc service on

shared 4L(3L Poc channelI

The parameters Jighest coding scheme of PC service in 2P'SK and Jighest coding scheme ofPC service in 12P'SK are used to define the highest coding scheme that could be used in Poc

serviceI

The parameters JEaximal resource for PC serviceK defines the percentage of current PS resource

that could be occupied in Poc service"ote: . the number when the database obtained P3TC should

be used as the basis for calculationI / if fraction occurs, the calculation results should be roundeddownI - this part of resources will be allocated to Poc usersI onl$ this part of resources could be used

for Poc service, i"e" this is the onl$ resource that could be used b$ Poc service"

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Rele#ant parameters


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ate*ory Parameter 2ame ,21 Parameter 2ame ,%21 Parameter code Ran*e & 3nit $"% efault

SU ee \]PoC ptimi%ed PoCservice support PCS4PP'T es(o o

SU ee =@ PC ,G

PoC D=

Eaximal users ofPC service on

shared PS channel6

PSC5P5TSB4L / @ -

SU ee

?@ PC ,GPoC D=

Eaximal users ofPC service on

shared PS channel.

PSC5P5TSB3L / @ -

SU ee2P'S ? PC

/

ighest codingscheme of PCservice in 2P'S

Poc5ttSeltB6CS. # CS/ # CS-

# CSACS-

SU ee1321 ? PC

/

ighest codingscheme of PC

service in 12P'S

Poc5ttSeltB. ECS. = ECSG ECS@

Ue ee PC d=Eaximal resourcefor PC service PCSrcThs 6=.66,7


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Chapter .F #ntroduction to Parameters of Eaximum 4L(3L 4sers 5llowedChapter .; #ntroduction to 'elevant Poc Parametershapter 0; 8uick Search for PSCrelated Radio Parameters

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+ fast check of radio parameters related to PS ser#ice


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fast chc! "f&a#a't#s #


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gsm training materials for special subjects--optimization of ps radio parameters_r2.0

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