8-CRNP System Message

8/22/2019 8-CRNP System Message

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Issue 3.0

RG0106CDMA 1X System Message



Internal Use

Objectives

After completing this course, you shouldbe able to understand

Abstract of system messages

Classification of system messages

Contents of mandatory system messages Adjustment of system messages



Internal Use

Chapter 1 Introduction

Chapter 2 Classification of system messages

Chapter 3 Contents of mandatory system messages

Chapter 4 Adjustment of system messages



Internal Use

Introduction to system message

In order to access CDMA network, MS must get enough

information.

Pilot Channel

Sync Channel

Paging Channel Forward Traffic Channel

Access ChannelReverse Traffic Channel

while other CDMA channels carry service, signaling, andmessages as well.



Internal Use

Common Structure of Message

P_REV

MIN_P_REV

SID

NID

PILOT_PN

LC_STATE

SYS_TIME

LP_SEC

LTM_OFF

DAYLT

PRAT

8

8

15

16

9

42

36

8

6

2

11

FieldLength

(in bits)

Sync Channel Message

CDMA_FREQ

EXT_CDMA_FREQ

1

11

All messages of traffic channel are

sent in burst mode.

The first byte indicates message

type

The subsequent fields indicate the

sequence of messages.

The message sending modes:

Confirmation;Re-sending by multiple times



Internal Use






http://slidepdf.com/reader/full/8-crnp-system-message 7/49Internal Use

Messages received in idle state

Sync Channel

Sync Channel Msg

Pilot Channel

No Messages

Paging Channel

Access Parameters Msg

System Parameters MsgCDMA Channel List Msg

Extended SystemParameters Msg

General Neighbor ListMsg

Extend Global ServiceRedirection Msg

Global ServiceRedirection Msg

User Zone IdentificationMsg

Private Neighbor ListMsg

Extend CDMA ChannelList Msg

Neighbor List Msg

Extended Neighbor List Msg

BTS



Messages received during conversation

In-Traffic System

Parameters Msg

Neighbor List

Update Msg

Extended Neighbor ListUpdate Msg

BTS



Classification by contents (Idle)

Sync Channel Message SCH.M

Access Parameters Message AP.M

System Parameters Message SP.M

Neighbor List Message NL.M

CDMA Channel List Message CCL.M

Extended System Parameters Message ESP.M

The cdma2000 protocol stipulates thirteen kinds

of system messages, of which six are mandatory.



Classification by contents (Idle)

Global Service Redirection Message GSRD.M

Extended Neighbor List Message ENL.M

Extended CDMA Channel List Message ECCL.M Private Neighbor List Message PNL.M

General Neighbor List Message GNL.M

User Zone Identification Message UZI.M

Extended Global Service Redirection Message EGSRD.M

According to the protocol of cdma2000, the sevensystem messages below are optional:



Classification by contents (traffic channel)

In-traffic System Parameters Message ITSP.M

Neighbor List Update Message NLU.M

Extended Neighbor List Update Message ENLU.M

System messages sent on traffic channel



Internal Use







Internal Use

Synchronization channel message

Sent on synchronization channel

When an MS is in initiation state, it obtains:

system configuration

time information

Important parameters in the message:

Minimum protocol revision version

SID, NID, PILOT_PN LC_STATE

System time

Paging channel rate

Time Synch



Internal Use

Explanation of important fields of SYN.M

LP_SEC: The number of leap seconds that have occurred since the

start of system. It means how much faster the GPS time is comparedto the real earth time. Its value of each year should be modified.

LTM_OFF (Local Time Offset): It indicates the time zone, that is,

the offset of the local time from the Greenwich time.

DAYLT (Is daylight saving time adopted?): If daylight saving time

is adopted, this field is set to 1, otherwise it is set to 0.

PRAT (Paging channel rate): when it is set to full rate, the capacity

of the paging channel will be increased at the cost of part of thecapacity of the forward link. When half rate is selected, the capacity

of the forward link will increase as the paging capacity decreases.



Internal Use

Explanation of important fields of SYN.M

SCHM_CDMA_FREQ: The desired carrier frequencyconfiguration for IS95 MS. If there is no special requirements

for frequency for IS95 MS and IS2000 MS concerning

networking, this parameter can be set to any normal carrier

frequency under that sector. The assigned frequency, the

CDMA channel number corresponding to the frequency the

carrier is employed for IS95 MS.

EXT_CDMA_FREQ: Extended assigned frequency, the CDMA

channel number corresponding to the frequency the carrier is

employed for MS IS 2000.



Internal Use

Example of SCH.M

From the system messages collected:

protocol revision version of this system is 5,minimum protocol revision version is 2,

SID is 14001, NID is 1, PN offset is 272,

difference between GPS time and the local time is 13 seconds,

time zone is the eighth east zone, daylight saving time is disabled,

and the paging rate is full rate.



Internal Use

System parameter message

Sent on the paging channel


PILOT_PN, SID, NID Configuration message sequence

number

REG-ZONE, ZONE-TIMER

BASE-ID, BASE-CLASS

PAGE-CHAN

MAX_SLOT_CYCLE_INDEX T-ADD,T-DROP, T-COMP,T-TDROP

Home registration class BTS Longitude

BTS Latitude

Pilot search window width

Power control report setting class

Optional system parameter class

existed indication

Handoff



Internal Use

Explanation of important fields of SP.M

REG_ZONE (Registration zone code): Registration zone code of

the sector where the MS is located. Registration zone codeindicates a group of BSs in a given system or network. An MS can

register in more than one zone. Zone cod (REG_ZONE) and the

SID/NID of the zone uniquely identify a zone.

TOTAL_ZONES: In ZONE-based registration, the number of registration zones that can be reserved by the MS. Only when

ZONE-based registration is used, that is, TOTAL_ZONES is not 0,

can REG_ZONE value take effect.

ZONE_TIMER (Zone code timer length): The MS saves

REG_ZONE in the SPM message to ZONE list. If no message

containing the REG_ZONE is received within the timer length, the

MS will delete the REG_ZONE.



Internal Use


MULT_SIDS (multi-SID storage ID): Whether the MS is allowed to

store SID_NID_LISTs with different SIDs

MULT_NIDS (multi-NID storage ID): whether the MS is allowed to

store SID_NID_LISTs with same SIDs but different NIDs.

PAGE_CHAN (Paging channel number): the paging channel

number of the carrier, whose value should not be 0. When the

capacity of the paging channel is insufficient at half rate, first increase

the rate of the paging channel. When at full rate and the capacity of

the paging channel is still inadequate, more paging channels should

be configured.

MAX_SLOT_CYCLE_INDEX (Maximum slot cycle index): the

maximum slot cycle index in the paging channel slot mode. In this

mode the MS decides on which slot it will work and reports it to BTS.



Internal Use


HOME_REG (Home registration ID): It indicates whether the non-roaming MS is

allowed to register. The non-roaming MS can perform automatic registration when the

values of HOME_REG and MOB_TERM_HOME (home cell called allowed indication)

are 1. The automatic registration includes power-up registration, power-down

registration, timer registration, zone registration, and distance-based registration as

well.

FOR_SID_REG (SID roaming registration ID): It indicates whether the MS roaming

from other SIDs is allowed to register. The MS roaming SIDs can perform automatic

registration when the value of this variable and MOB_TERM_FOR_SID (set in the MS)are 1. The automatic registration includes power-up registration, power-down

registration, timer registration, zone registration, and distance-based registration as

well.

POWER_UP_REG (Power-up registration ID): It indicates whether startup

registration is allowed, that is, whether the MS is allowed to register automatically upon

being powered on and receiving system messages. When the value of this variable isset to 1, automatic registration is allowed, and when it is set to 0, automatic registration

is not allowed. In order to prevent repeated registration resulted from fast power-on

and power-off, the MS is not allowed to register until 20 seconds after it enters the idle

state.



Internal Use


PARAMETER_REG (Parameter change registration ID): Whether the MS is

allowed to register automatically when certain parameters stored in it is changed.When this field is set to 1, it means allowed, and when it is set to 0, it means

unallowed. Examples of such parameters (all are set on the MS side) include

SLOT_ CYCLE_ INDEXp, SCMp, MOB_TERM_HOMEp /

MOB_TERM_FOR_SIDp, MOB_TERM_FOR_NIDp, the band classes, power

levels, and wireless configuration supported by the MS. Parameter change

registration will also be activated when there is no record corresponding to SIDand NID of BTS in SID_NID_LISTs stored in the MS. If parameter change occurs,

the MS deletes the SID_NID_LISTs.

REG _ PRD (Timer registration period): the timer-based registration period of

the MS. It is set to 0 when timer-based registration is disabled.

BASE _ LAT (BTS Latitude): To be configured according to the actual latitude of

BTS.



Internal Use

Example of SP.M



Internal Use

Sample of System Parameters Message



Internal Use

Access parameter message



PILOT_PN,

Message sequence number.

Access channel number

NOM-P, INIT-P, P-STEP

Access probe number NUM-STEP

Maximum access channel message

capacity

Pilot frame number of access channel

Access overload level Continuous increment sent by access

attempt message

Correction sent by access attempt

message during registration

Access waiting time

Access channel probe time random

value

Access probe compensation

MAX-REQ-SEQ, MAX-RSP-SEQ

Authentication mode

Random query value of authentication

Extended rated sending power

Power Control



Internal Use

Explanation of important fields of AP.M

PCN (Paging channel number): Each paging channel is configuredwith a record according to the number of paging channels actually

configured.

NUM_STEP (Access probe number): number of access probe

allowed in each access probe sequence. The greater the value, thegreater the probability of access in an access probe sequence, the

greater the interference in the reverse link when access fails. The

access performance is determined by parameters NUM_STEP,

PWR_STEP, and INIT_PWR.

PSIST0_9 (access load level 0~9 continuous): It is used to reduce

the access collisions.

For more details, please see the <<CDMA1X BSS Network Planning Parameter Configuration Guide>>



Internal Use


REG_PSIST (registration continuous correction): It indicates continuous

correction of access attempt message during registration.

PROBE_PN_RAN (access probe random delay): It is used for calculating

the random delay of PN. In an access attempt, the precise transmission time

of the access channel is determined by a PN random process. The MS

transmit RN PN chips latter than the system time, RN being calculated by hash

function with the range of 0~2 PROBE_PN_RAN-1 PN chips.

ACC_TMO (Response time-out time): the response time-out time for access

probe, when it exceeds (2+ACC_TMO)*80ms, it will be considered that BTS

has not received messages from the access channel. The interval between

basic access and response is about 350ms, therefore the value of this

parameter should be 3 or greater.




Internal Use


PROBE_BKOFF (access probe delay): It indicates the maximum

delay between access probes in an access sequence. If the publicchannel multiplexing sub-layer sends all access probes in an access

sequence on the same R-ACH corresponding to the current F-PCH,

the next access probe is sent after an additional delay RT, which is

randomly generated from (0,1+PROBE_BKOFF) slots.

BKOFF (access probe sequence delay): The value of this parameter

is the maximum delay of the access probe sequence-1. For each

access probe sequence (except the first one), there is a sequence

delay RS generated randomly from (0,1+BKOFF).

MAX_REQ_SEQ (maximum number of probe sequences of access channel inquiry): It indicates the maximum number of access

probe sequences corresponding to an access channel request (e.g.

originating call).




Internal Use


MAX_RSP_SEQ (maximum number of probe sequences of accesschannel response): It is the maximum number of access probe

sequences corresponding to an access channel response (e.g. paging

response).

NOM_PWR_EXT (Extended nominal transmit power ): Used in openloop power estimation. Together with nominal power, it is used for

calibrating the offset of BTS transmit power from the nominal power.

PSIST_EMG: It indicates the continuous correction during emergency

calls by the MS at the load level of 0~9. This parameter is invalid if

PSIST_EMG_INCL is set to 0.




Internal Use


MAX_CAP_SZ: The maximum number of frames allowed by each

access channel message, which is set to 3. If the value set is too small,

BTS can not send originating call message containing lots of dial

numbers or Data burst Message. The greater the value set, the larger

access channel message allowed to be sent, but the more chance of

message conflict. Generally 4 frames are quite enough, even for the

longest Data Burst Message.

PAM_SZ: Length of access channel Preamble. Too great a value can

result in waste of access channel capacity, ie. if 1+PAM_SZ frames

carry no messages, less frames are enough for BTS to capture the MS.

Too small a value can lead to decreasing probability that BTS checks

the MS successfully and to more resent messages, (doubled at least).The adjustment of this parameter is related to the size of the search

window BTS Capture Access Channels.




Internal Use

Example of important fields of AP.M

E l ti f i t t fi ld f AP M



Internal Use


N i hb li t



Internal Use

Neighbour list message


Important parameters in the message: PILOT-PN, PILOT-INC

Information of neighbor pilot 1

Configuration of neighbor pilotPilot PN sequence offset index of neighbor

pilot

Information of neighbor pilot 2

……

Information of neighbor pilot N

Handoff

E t d d i hb li t



Internal Use

Extended neighbour list message

E t d d i hb li t



Internal Use

Extended neighbour list message

CDMA h l li t



Internal Use

CDMA channel list message



PILOT-PN Assigned frequency of CDMA channels

(e.g. 201...)

Channel Info

E l ti f CCL M t



Internal Use

Explanation of CCL.M parameters

Field Description Length

PILOT_PN Pilot PN sequence offset index. BTS pilot offset in 64PN

chips.9

CONFIG_MSG_S

EQ

Configuration message sequence number. 6

CDMA_FREQ

(one or more

fields)

Assigned CDMA frequency channel. The value of this field

is designed to support CDMA channels in sequence from

Channel 1 to Channel N. All CDMA channels that are

supported by the BTS and contain paging channels

should be listed in the table. CDMA frequency channels in

the primary set should first be listed.

11

I t t fi ld f CDMA li t



Internal Use

Important fields of CDMA list message

E t d d t t



Internal Use

Extended system parameter message

Pilot set update threshold

System reselect class parameter Access handover class

parameter

GPS auxiliary indication

Fast paging service class

parameter



PILOT_PN, Config-Msg-Seq

Adopted for TMSI, data length

TMSI data ID type of the primary access

channel for the MS

MCC

Broadcast slot cycle index

Minimum protocol revisionversion

Data traffic

E l ti f ESP M t



Internal Use

Explanation of ESP.M parameters

BCASE_INDEX (broadcast slot cycle index): When periodical broadcast

paging is allowed, this parameter is set to any number from 1 to 7 to identifybroadcast slot cycle index, otherwise, it is set to 0.

IMSI_T_SUPPORTED (IMSI_T supported ID): If it is set to 1, it means that

IMSI_Ts consisting of 15 digits are supported.

PACKET_ZONE_ID (Packet data service zone ID): If packet data servicezone is supported, BTS will set this parameter to packet data service zone ID,

otherwise BTS will set it to 0.

MAX_NUM_ALT_SO: Maximum number of alternative services, identifying the

maximum number of alternative services the MS allows in Originating Message

and Paging Response Message.

RESELECT_INCLUDED: System reselect parameter included. If system

reselect parameter is included, set this parameter to 1, otherwise set it to 0.

E l ti f ESP M t



Internal Use

PILOT_REPORT (pilot report order):

If the MS is required to report the additional pilots whose strength exceed

T_ADD in all access channel messages, BTS will set it to 1. If it is set to 0, they

will only be reported in Originating Message and Paging Response Message.

ACC_ENT_HO_ORDER (Access Entry handover order): If

NGHBR_SET_ENTRY_INFO is 1, BTS contains this field. Set

ACC_ENT_HO_ORDER to 1 if the MS is permitted to perform an access entry

handoff while performing the MS Order and Message Processing Operation in

the MS Idle State. Otherwise, the base station shall set this field to 0.

ACCESS_HO (access handover allowed order): If the value of NGHBR_SET_ACCESS_INFO is 1, BTS contains this field. Set ACCESS_HO

to 1 if the MS is allowed to perform access handover, otherwise set it to 0.

Explanation of ESP.M parameters

Example of ESP M



Internal Use

Example of ESP.M




Internal Use




Internal Use





Adjustment of system messages



Internal Use


This command is executed to modify system message control

parameters, for example, setting the system messages to be sent.




Internal Use

This command is executed to modify authentication

parameters.





Internal Use

This command is executed to modify the in synchronizationchannel system message of specified sector carrier.





Internal Use

This command is executed to modify part of system parameter

messages for the specified sector carrier.





Internal Use


This command is executed to modify part of extended system

parameters of specified sector carrier.





This command is executed to modify part of the parameters of

access channel message.

Documents

8-CRNP System Message