PHS MoU Document
B-NW 0.00-04-TS
Title: Public Personal Handy-phone System :General Description of Network and System Configurations
Version: 04
Date: December 19, 1997
PHS MoU Classification: Unrestricted
List of contents:<Summary>
1. Relation with international standards
2. Differences from ITU-T Recommendation
3. References
4. Items for Further Study<Text>
1. General
1.1 Objective of this document
1.2 Structure of network document
2. Scope of current network and system configurations for public PHS
network
2.1 General
2.2 Basic public PHS network
2.3 Public PHS network integrated with non-IN structured PSTN/ISDN
2.4 Internetworking with other networks
2.5 Internetworking between public PHS networks
3. Numbering plan and identification Codes for public PHS
3.1 Definition of number and identification Codes
3.2 PHS number
3.3 International PS identification code
3.4 International CS identification code
3.5 PHS Roaming Number
4. Future directions
Annex A GLOSSARY and ABBREVIATIONS

Number of pages: 25

PHS MoU Group
c/o Association of Radio Industries and Businesses (ARIB)
14F, Nittochi Bldg., 4-1, Kasumigaseki 1-choume, Chiyoda-ku, Tokyo 100, Japan
TEL +81-3-5510-8599 FAX +81-3-3592-1103© PHS MoU Group1997

PHS MoU Document
B-NW 0.00-04-TS
Version
01

02

History of Revised Versions
Date
OutlineEstablished as follows.
17 April 1996 Document No. : NW0.00
Document Title : Summary of Personal
Handy-Phone system
This version is the overall revised version of
17 Dec. 1996 the above-mentioned NW0.00.
Clause 3 and Clause 4 are changed.

0304

11 July 1997

19 Dec. 1997

Sub-clause 3.5 PHS Roaming Number is added.
Glossary and abbreviations are aligned with AGN1.00 (Glossary and Abbreviations)

B-NW0.00-04-TS
Public Personal Handy-Phone System:
General Description of Network and System Configurations<Summary>
1. Relation with international standards
This document refers to ITU-T Recommendation E.164.
2. Differences from ITU-T Recommendation
None
3. References
ITU-T Recommendation E.160
ITU-T Recommendation E.164
ITU-T Recommendation E.166
ITU-T Recommendation E.212
4. Items for Further Study
(1)
(2)
(3)

Application of IN CS-3 modelling and relation to IMT2000
Public PHS network attached to PLMN
Roaming service between public PHS network and PLMN

B-NW0.00-04-TS(1)

B-NW0.00-04-TS
Public Personal Handy-Phone System:
General Description of Network and System Configurations
Contents
1. General ..........................................................................................................................................

1

1.1 Objective of this document ...................................................................................................

1

1.2 Structure of network document.............................................................................................

1

2. Scope of current network and system configurations for public PHS network ............................

2

2.1 General ..................................................................................................................................

2

2.2 Basic public PHS network ....................................................................................................

2

2.2.1 Objectives ..................................................................................................................

2

2.2.2 General description and definition ............................................................................

2

2.3 Public PHS network integrated with non-IN structured PSTN/ISDN ..................................

5

2.3.1 Objectives ..................................................................................................................

5

2.3.2 General description and definition ............................................................................

5

2.4 Internetworking with other networks ....................................................................................

7

2.4.1 Objectives ..................................................................................................................

7

2.4.2 General description and definition ............................................................................

7

2.5 Internetworking between public PHS networks....................................................................

8

2.5.1 Objectives ..................................................................................................................

8

2.5.2 General description and definition ............................................................................

8

3. Numbering plan and identification Codes for public PHS............................................................ 11
3.1 Definition of number and identification Codes .................................................................... 11
3.2 PHS number .......................................................................................................................... 12
3.3 International PS identification code...................................................................................... 15
3.4 International CS identification code ..................................................................................... 16
3.5 PHS Roaming Number.......................................................................................................... 17
3.5.1 One Number per Network.......................................................................................... 18
3.5.2 One Number per roaming PS ..................................................................................... 18
3.5.3 one temporary number at call origination to roaming PS .......................................... 19
4. Future directions............................................................................................................................ 21
Annex A GLOSSARY and ABBREVIATIONS................................................................................ 22

B-NW0.00-04-TSi

1. General
1.1 Objective of this document
This document describes outlines of the network models and the network functions of the public PHS
network which is based on the Intelligent Network (IN) architecture. The public PHS network is
defined as the network which supports location registration, terminal authentication and service
provision for the public personal stations and includes the cell stations.
The functional architecture, the physical architecture of the public PHS network model according to
the ITU-T Recommendations relating to the IN CS-2, and the interface reference points are describedin the other document. The descriptions relating to the application of IN CS-3 modelling and therelation to FPLMTS, the public PHS network attached to the PLMN, and the roaming service between
the public PHS network and the PLMN are subjects for further study.
1.2 Structure of network document
This subclause describes the general information about B-NWx.xx series documents of PHS MoU
group. The current B-NWx.xx series documents are structured as follows.
B-NW0.00 : General Description of Network and System Configuration
This document includes the general information, outlines of the network models and the
network functions.
B-NW1.00 : Network and System Configuration
This document includes the general information, definition of the functional architecture,
the physical architecture according to the ITU-T Recommendations relating to the IN
CS-2, and the interface reference points for public PHS network.
The B-IFx.xx series documents will specify the protocol specifications at the interface reference
points defined by the B-NW1.00 document.
The B-IWx.xx series documents will specify the interworking rules between the signalling protocols
which are used each side of the interworking function for the call related signalling or the callunrelated signalling.

B-NW0.00-04-TS

1

2. Scope of current network and system configurations for public PHS network
2.1 General
This subclause describes the current scope of network and system configurations which provide thepublic PHS services and the broader connectivity to public PS by mean of internetworking between
the public PHS network and the other networks.
Basic public PHS network is intended to model functionality and physical arrangement. This model isdedicated to support public PHS services.
There are following areas of scope based on the basic public PHS network:(i) Integration with other networks
A basic public PHS network can be integrated with IN or non-IN structured PSTN/ISDN.
(ii) Internetworking with other networks
There are two type of the internetworking between the public PHS network and the other networks. In
the first case, calls between PHS subscriber and other network subscriber are provided throughinternetwork connection between public PHS network and other networks. In the second case, theinternetworking provides roaming service. Other possible case is the internetworking provides
roaming service between public PHS network and PLMN. This case is for further study.
2.2 Basic public PHS network
2.2.1 Objectives
The basic public PHS network is intended to represent to the case where the PHS service provider
needs to introduce PHS networks without having existing other networks.
2.2.2 General description and definition
Basic public PHS network model defines the entire functionality and possible physical arrangements
required for public PHS services provision by itself.
The configuration of this basic public PHS network is shown in Figure 2-1/B-NW0.00 . The PHS
subscriber data and location information are stored in the SCP (Service Control Point), the PSC (PHS
Switching Center) which provides public PHS service can utilize this information.
For the implementation of this basic public PHS network, integration with other IN-structured
network, such as PSTN and ISDN, can be possible as shown in Figure 2-2/B-NW0.00.

2

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Public PHS network

SCP

PSC

Public Cell station

Public Personal station

Public Personal station

Figuer 2-1/B-NW0.00 Basic public PHS network

PSTN/ISDN

SCP

PSC, PSTN/ISDN
SwitchPublic Cell station

Public Personal station

Telephone

Figuer 2-2/B-NW0.00 IN-structured PSTN/ISDN with PHS

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3

For example, the outline of the routing processes by the basic public PHS network are shown in
Figure 2-3/B-NW0.00 and general process in principle, is as follows:(a) Personal station number-1 (PS#1) requests a call to personal station number-2 (PS#2).
(b) PSC#1 accesses to the SCP to get the subscriber data for PS#1 (including the authentication data)
and the location information of PS#2.
(c) PSC#1 routes a call to PSC#2 where PS#2 is locating according to the information received fromthe SCP.
(d) PSC#2 retrieves the subscriber data for PS#2 (including the authentication data) from the SCP.
(e) A call is offered to PS#2 from PSC#2.

Public PHS network

SCP

(b)

PSC#1
(a)

(d)

(c)

PSC#2
(e)

Public Cell station

PS#1 Public Personal station

PS#2

Figure 2-3/B-NW0.00 Outline of call in Basic public PHS network

4

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2.3 Public PHS network integrated with non-IN structured PSTN/ISDN
2.3.1 Objectives
This case is intended to cover that public PHS service provider needs to introduce PHS local networks
to the non-IN structured PSTN/ISDN. In this case, basic public PHS network is attached to existing
PSTN/ISDN.
2.3.2 General description and definition
Public PHS network integrated with non-IN structured PSTN/ISDN model defines the entire
functionality and possible physical arrangements required for public PHS services provision to be
attached to the existing non-IN structured PSTN/ISDN.
The configuration of this network shown in Figure 2-4/B-NW0.00. The additional PHS local network
elements for the provision of PHS services are the PSC and the SCP. Only the PSC can control a call
to/from PHS subscribers and location registration. All calls to be routed to public PS must passthrough the PSC which can access the SCP containing location information for the public PS. The
PSC serves as overlay transit exchange for a call from PSTN/ISDN while it serves as local exchange
for a call to/from public PS. A call to other network is routed through the existing PSTN/ISDN.
PSTN/ISDN

PSTN/ISDN
Switchexisting
network

SCP

PSC

PHS local
network

PublicCell station

Telephone

Public Personal station

Figure 2-4/B- NW0.00 Non-IN structured PSTN/ISDN

B-NW0.00-04-TS

5

For example, the outline of procedures for routing in Non-IN structured PSTN/ISDN is shown in
Figure 2 -5/B-NW0.00 and general process ,in principal, is as follows:(a) A PSTN/ISDN subscriber requests a call to the public personal station (public PS).
(b) The originating local exchange to that PSTN/ISDN routes a call to the PSC.
(c) The PSC#1 accesses to the SCP to get the location information of public PS.
(d) The PSC#1 routes a call through the PSTN/ISDN to the PSC#2 where terminating public PS is
locating.
(e) PSC#2 retrieves the subscriber data for public PS (including the authentication data) to the SCP.
(f) A call is offered to public PS from PSC#2.

PSTN/ISDN(a)( d ) existing
network
Telephone

SCP
(b)

(c)

(e)
PHS local
network

PSC#1

PSC#2

(f)

Public Cell station

Public Personal station
Figure 2-5 /B-NW0.00 Outline of incoming call in Non-IN structured PSTN/ISDN

6

B-NW0.00-04-TS

2.4 Internetworking with other networks
2.4.1 Objectives
This case is intended to support the internetworking between PHS network and other networks inorder to provide the broader connectivity to the public PS. This internetworking enables to connect acall between the public PS subscribers and the subscribers of other networks such as PSTN/ISDN,
PLMN and PHS. Roaming of public PS is out of the scope of this case.
2.4.2 General description and definition
Internetworking of public PHS network with other network defines the entire functionality andpossible physical arrangements required to provide the connectivity between public PS and terminal
in other networks.
There are two types of the internetworking between PHS network and the other network. First is toconnect directly, second is to connect via transit network; international network and long distancenetwork as shown in Figure 2-6/B-NW0.00.

Public PHS networktransit network*2

another network *1

IFIF•1 : PSTN/ISDN, PLMN,PHS•2 : international network,
long distance network

Public Personal station

Telephone

Figure 2-6/B-NW0.00 Internetworking with other networks

B-NW0.00-04-TS7

2.5 Internetworking between public PHS networks
2.5.1 Objectives
This case is intended to support telecommunications between public PSs in different public PHS
networks and roaming of public PS between public PHS network..
2.5.2 General description and definition
Internetworking between public PHS networks defines the entire functionality and possible physicalarrangements required to provide the connectivity between public PSs in different public PHS
networks and the roaming of public PS between public PHS networks.
Outline of network configuration for roaming is shown in Figure 2 -7/B-NW0.00 and general process
how the roaming environment for public PS is provided is as follows:
When a public PS roams to other public PHS network, VLR (visited location register) is temporally
created by transferring the copy of subscriber data for interested public PS in the HLR (home location
register) for a while the roamed public PS is in the visited public PHS network.
The routing schemes to route a call to roamed public PS are through home public PHS network andredirection. The outline of these schemes is shown in Figure 2-8/B-NW0.00 and general process is asfollows:(a) Through home network
An originating network connects an originating call to the home network, and the home network
connects the call further to a visited network based on the visited network information stored in thehome network, In this case, the channel is continuously connected through home network.
(b) Redirection
An originating network connects an originating call to the home network, and the home network
requests redirection to the originating network by clearing connection, and the originating network
again connects the call directly to the visited network based on the visited network information
contained in the release message. In this case, the routing of the channel is changed to become ashorter route.
(c) Look ahead (for further study)
An originating network accesses the home network and receives the visited network information
before routing a call, and connects an originating call directly to a visited network. This routing
scheme can effectively use circuit resources,but is subject to further study.

8

B-NW0.00-04-TS

Home network

Visited network

SCP

SCP

(HLR)

(VLR)

PSC

PSC
Public Cell

Public CellstationstationMove around
Public Personal station

Public Personal station

Figure 2-7/B-NW0.00 Outline of roaming

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9

Call originating network

Home network

Visited network

SCP

SCP

(HLR)

(VLR)

PSC

TelephoneCall originating network

PSC
Public CellstationThrough home network

Public Personal station

Home network

Visited network

SCP

SCP

(HLR)

(VLR)
PSC

PSC

Public Cellstation

Telephone

Redirection

Public Personal station

Figure 2-8/B-NW0.00 Routing schemes to the visited network

10

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3. Numbering plan and identification codes for public PHS
3.1 Definition of number and identification Codes
PHS number is used for identifying PHS subscriber. PHS number can be dialed by the user who
originates call to the public PS.
PHS number is used throughout the public PHS network. The valid domain of PHS number is shownin Figure 3-1/B-NW0.00.
PS identification code is used for identifying public PS in the air interface. PS identification code is
not recognized by the user. PS identification code is used only in the air interface. The valid domainof PS identification code is shown in Figure 3-1/B-NW0.00.
International CS identification code is used for identifying public CS in the air interface.
International CS identification code is not recognized by the user. International CS identification
code is used only in the air interface. The valid domain of International CS identification code isshown in Figure 3-1/B-NW0.00.

Public PHS Network
ISDN Part
CSPS

CC for International PSid
PSid
[CC+]CSid
PHS Number (PSN)

Figure 3-1/B-NW0.00 Public PHS network configuration and valid domain of number and ids

B-NW0.00-04-TS

11

3.2 PHS number
The format of it should comply with the numbering plan described in the ITU-T Recommendation
E.164. The number structure is shown in Figure 3-2/B-NW0.00.

CC

NDC

SN

National significant number
International ISDN number

CC Country code as defined by Recommendation E.164
NDC National destination code
SN Subscriber number
Figure 3-2/B-NW0.00 E.164 number structure

The 10 types of character set 0-9 is used throughout the ISDN numbering plan format including
subscriber number, national (significant) number and the country code.
The international number may be of variable length. The maximum number length shall be 15 digits.
However, some Administrations may wish to increase their register capacity to 16 or 17 digits. The
decision on register capacity is left as a matter to be taken by individual Administrations. The length
does not include prefixes, language digit, address delimiters (e.g., end of pulsing signals, etc.) sincethese items are not considered as part of the international ISDN number.
The NDC field will be variable in length depending upon the requirements of the destination country.
The NDC can be used to select a destination Public PHS network serving the destination PHS
subscribers. It may include the PHS service identification code. It must include the information to
identify PHS operator to which the PHS subscriber subscribes.
The assignment of country codes is administered by ITU-T, while NDC plus SN code assignments area national responsibility (FFS).
PHS subscribers will always be called by the same subscriber number irrespective of where in the
network the call originates. For calls in the same numbering area or local network the subscriber
number alone may be dialed. For national calls between numbering areas or local networks thesubscriber number may be preceded by the national prefix and NDC. The use of prefixes shall be inaccordance with Recommendations E.160, E.164 and E.166. Where necessary, prefixes can also be
used for network and service selection.
PHS number is kept in the public network of the country where the public PS is registered. PHS
number is associated with the location information and authentication information in the network.

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PHS number is also kept in the public PS. PHS number is given to the public PS by the PHS operator.
The numbering type and numbering plan used in various cases are shown in Table 3-1/B-NW0.00. In
the table, country A is the country where the public PS is registered, country B is the country where
the opponent terminal (either a public PS or an existing terminal) is registered, country C is thecountry where the public PS is located, and country D is the country where the opponent terminal islocated (see Figure 3-3/B-NW0.00).

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13

Table 3-1/B-NW0.00 The numbering type and numbering plan used in various cases

Countrywhere PS isused

C=A (domesticuse)C•‚A (overseas
use)

B•‚A
B=A
Countrywhere the opponent(intra-registratio (inter-registrati
terminalisregisteredarea use)
areause)E.164/Domesticnumber or
Undetermined/Undeterminedoriginatio calling
partynumber
from the PS
or handoverof the PS
calledpartynumber

E.164/Domestic
number

E.164/Internationa
E.164/International
numbernumbercalling
partynumber

E.164/Domestic
number

E.164/Internationa
E.164/International
numbernumbertermination
to the PS

E.164/Domesticnumber

E.164/International
number

Undetermined/Undetermined

E.164/International
number(furtherstudy*1)

Undetermined/Undetermined

E.164/International
number(furtherstudy*1)

calledpartynumber

Pagingmessage

Locationregistratio(forreference)
Dialprocedure

E.164/International
numbernational
prefix+national
numberinternatinal
prefix+ countrycode +national
numberinternatinal
prefix+ countrycode +national
number(including
B=C)

Notationexplanation:
Numbering planidentifier/Type of number*1:issueon how to indicate
national/internationaland containmore
than 13 digits

Country C

Public PS(registered in
Country A)

Country D

The opponent termminal(telephone or PS registered in
Country B)

Figure 3-3/B-NW0.00 Registration and location model used in Table 3-1/B-NW0.00

14

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3.3 International PS identification code
The structure of International PS identification code is shown in Figure 3-4/B-NW0.00.

3 digitCC

28 bit
PS identification code
PS identification code

International PS identification code
CC Country code as defined by ITU-T Recommendation E.212
Figure 3-4/B-NW0.00 International PS identification code structure
CC is country code (CC) as defined by ITU-T Recommendation E.212. CC contains the country
where the public PS is registered. The PS identification code is a set of 28 bits (0 or 1) and the lengthis fixed.
PS identification code is unique for the public PS in the registered country.
PS identification code is kept in the public PS. The PS identification code is also kept in thecommunicating public CS temporarily during the call. CC of international PS identification code is
not necessary when the public PS remains in the registered country and for this reason some public PS
does not keep CC of international PS identification code.

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15

3.4 International CS identification code
The structure of international CS identification code is shown in Figure 3-5/B-NW0.00.

42 bit3 digitCC

9 bit

33 bitOperator
identifica
tion code

Public system additional ID
Paging area number
np bitAdditional ID
33-np bit

CS identification code
International CS identification code
CC Country code as defined by ITU-T Recommendation E.212
np n for paging
Figure 3-5/B-NW0.00 International CS identification code structure
CC is country code as defined by ITU-T Recommendation E.212. CC contains the country where thepublic CS is registered. The CS identification code is a set of 42 bits (0 or 1) and the length is fixed.
The first 9 bits of the CS identification code indicates the public PHS operator.
CS identification code is unique for the public CS in the registered country.
CS identification code is kept in the public CS. The operator identification code of CS identification
code is kept in the public PS, while the other part of CS identification code is kept in the public PS
temporarily while the public PS remains in the public CS zone. CC of international CS identification
code is not necessary when the PHS operator provide services for domestic public PS, and for thisreason some public CS and public PS does not keep CC of international CS identification code.

16

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3.5 PHS Roaming Number
PHS roaming number is a number that the visited public PHS network assigns to a public PS which isroaming in that public PHS network. PHS roaming number is based on E.164
This sub-clause specifies the schemes for assigning PHS roaming number.
There are following three ways how to associate PHS roaming number to the public PS: i) one PHS
roaming number is assigned to all public PSs which roam to that visited network; ii) one PHS
roaming number is permanently assigned to individual public PS during roaming to that visited
network; and iii) one PHS roaming number is temporarily assigned to a call to be terminated toroaming public PS to that visited network.
Note that inclusion of second way listed here and explained hereinafter is explanatory purpose
only. Total specifications including protocol specification for this way may not be completed.
The characteristics of three ways are summarized in Table 3-2/B-NW0.00.
Table 3-2/B-NW0.00 Characteristics of Each Method of PHS Roaming Number Assignment
MethodRoaming number
one roaming number
assignment method No. per roaming public PS
1: one roaming number
per network

Association

network (all PSs
roamed to that visited
network)

Roaming number
assignment method No.2:
one temporary roaming
number at call origination toroaming public PS

every public PS roamed every call to be terminatedto that visited network roaming public PS to that
visited network

Assignment timing when network starts the when the public PS
of PHS roaming
roaming service
roams in the visited
number
network

when the origination of acall to roamed public PS is
informed to the visited
network

Release timing of
PHS roaming
numbernever released

when the public PS
roams out to othernetwork or move backto home network

when the call is delivered toroamed public PS in thevisited network or
expiration of guard timer

Capacity of PHS
roaming number

one per network

big (reserve PHS
small (reserve PHS numbers
numbers sufficient tosufficient to maximum
maximum number of
number of simultaneous
simultaneously roaming calls to be terminated to
public PS to that visited roaming public PS to that
networkvisited network)

Identification ofroamed public PS

PHS number (needs tobe transferred between
network in addition to
PHS roaming number)

PHS roaming number

PHS roaming number

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17

3.5.1 One Roaming Number per Network
In this case, one PHS roaming number is permanently assigned to visited network. All calls arerouted to the visited network using one PHS roaming number. In addition to PHS roaming number,
PHS number needs to be transferred to the visited network to identify which public PS terminates acall routed by PHS roaming number.

Call Origination Network

Home Network
Visited Network(1) PHS roaming
number=PRN1

SCP(4)PS1(3)PS1SCP(5) PRN1(7)PS1(6) PRN1+PS1(8) PS1(2) call origination

roaming
PS1
Figure 3-6/B-NW0.00 Example Procedure for routing a call using one PHS roaming number
per network
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)

18

The visited network informs PHS roaming number (PRN1) which is assigned to all roaming
public PSs when the PS1 requests the first location registration in the visited network.
A call to the roaming public PS is originated.
Call origination network routes a call to home network.
The home network makes a query to the SCP to get location of designated public PS (in this casePS1).
The SCP returns the PHS roaming number (PRN1).
The PHS switching center routes a call to the visited network using PRN1 along with the PS1.
The visited network decides a call is for roaming public PS by the PRN1, and makes a querywith PS1 to the SCP to get location of roaming PS1
The visited network delivers a call to PS1.

B-NW0.00-04-TS

3.5.2 One Number per roaming public PS
Note that inclusion of second way listed here and explained hereinafter is explanatory purpose
only. Total specifications including protocol specification for this way may not be completed.
In this case, one PHS roaming number is permanently assigned to individual roaming public PS
during the roaming. All calls are routed to the visited network using PHS roaming number. PHS
number needs not to be transferred to the visited network. The visited network can identify which
public PS terminates a call routed by PHS roaming number.

Call Origination Network

Home Network

Visited Network(1) PHS roaming
number=PRNi

SCP(4)PS1(3)PS1SCP(5) PRNi(6) PRNi(7)PRNi(8) PS1(9) PS1(2) call origination

roaming
PS1
Figure 3-7/B-NW0.00 Example Procedure for routing a call using one PHS roaming number
per roaming public PS
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)

The visited network informs PHS roaming number (PRN1) which is assigned to a roaming
public PSs when the PS1 requests the first location registration in the visited network.
A call to the roaming public PS is originated.
Call origination network routes a call to home network.
The home network makes a query to the SCP to get location of designated public PS (in this casePS1).
The SCP returns the PHS roaming number (PRNi).
The PHS switching center routes a call to the visited network using PRNi.
The visited network decides a call is for roaming public PS by the PRNi, and makes a query with
PRNi to the SCP to get location of roaming public PS.
The SCP returns the PS1.
The visited network delivers a call to PS1.

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19

3.5.3 One Temporary Roaming Number at Call Origination to Roaming Public PS
In this case, one PHS roaming number is temporarily assigned to individual call origination to aroaming public PS during the roaming. All calls are routed to the visited network using PHS roaming
number. PHS number needs not to be transferred to the visited network. The visited network canidentify which public PS terminates a call routed by PHS roaming number.

Call Origination Network

Home Network

Visited Network(1)/(5) PHS roaming
number=PRNi

SCP(4)PS1(3)PS1SCP(6) PRNi(7) PRNi(8)PRNi(9) PS1(10) PS1(2) call origination

roaming
PS1
Figure 3-8/B-NW0.00 Example Procedure for Routing a Call
Using One Temporary Roaming Number at Call Origination to Roaming Public PS
The visited network informs identifier of visited network when the PS1 requests the first location
registration in the visited network.
(2) A call to the roaming public PS is originated.
(3) Call origination network routes a call to home network.
(4) The home network makes a query to the SCP to get location of designated public PS (in this case
PS1).
(5) The SCP sends request to the visited network using identifier of visited network in order to get
the temporarily PHS roaming number (PRNi).
(6) The SCP returns the PHS roaming number (PRNi).
(7) The PHS switching center routes a call to the visited network using PRNi.
(8) The visited network decides a call is for roaming public PS by the PRNi, and makes a query with
PRNi to the SCP to get location of roaming public PS.
(9) The SCP returns the PS1.
(10) The visited network delivers a call to PS1.
(1)

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4. Future directions
The application of IN CS-3 modelling and the relation to IMT2000 are subject for further study. The
ITU-T Recommendations relating to the IN CS-3, which will support IMT2000 requirements, areplanned to be frozen by the end of 1998.
The PHS network attached to the PLMN, which is attaching the cell stations to the existing PLMN
and utilizing the PLMN location registration and authentication functions, is subject for further study.
This item may be studied according to the requests of the members after September 1996.
The roaming service between the public PHS network and the PLMN is subject for further study.

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Annex A GLOSSARY and ABBREVIATIONSThis annex forms an integral part of this document.
GLOSSARY***A***
authentication
ITU-T
This is the function that acknowledges that the personal station carrying out
communication is the correct personal station. It carries out call reception, call sending,location registration, etc.
***B******C***
Cell Station (CS)ARIB
The cell station carries out mobile radio communication with personal station on land.
Country Code (CC)ITU-T
The Country Code is information used to identify the country. It is contained in PHS
Number and in PS and CS identification Codes. In the former case, it consists of one, twoor three digits and is defined by ITU-T Recommendation E.164. And in the latter case, it
consists of three digit and is defined by ITU-T Recommendation E.212 as a name of
Mobile Country Code.
CS identification code (CSid)
ARIB
The CS Identification Code is information used to identify the CS. It is not recognized byuser and is used only in the air interface. The CSid structure is shown below.
Operator identification code+Paging area number+Additional id***D******E******F******G******H***
Home Location Register (HLR)
ITU-T
Register where the current location and all subscriber profile for PS are permanently
stored.

22

B-NW0.00-04-TShome network

ITU-T

The geographical area of the network where the user normally resides, or the service provider isassociated with.

***I***
IN-structured PSTN/ISDN
PSTN/ISDN applies IN architecture.

PHS MoU

Integrated Service Digital Network (ISDN)
ITU-T
An integrated digital network in which the same digital switches and digital paths areused to establish connections for different services, for example, telephony, data.
Intelligent Network (IN)ITU-T
A telecommunications network architecture that provides flexibility for facilitating the
introduction of new capabilities and services, including those under customer control.
international CSid
PHS MoU
International CSid is information containing CC and CSid to identify the CS uniquely
throughout the world..
international PSid
PHS MoU
International PSid is information containing CC and PSid to identify the PS uniquely
throughout the world..
***J******K******L***
Local Exchange (LE)An exchange in which subscriber’s lines terminate.

ITU-T

Location Information (LI)
TTC
This contains one of following types of information depending on the status of personal
station:-personal station is roaming to other public PHS network and roaming number assigned
by visited network for roaming personal station to route a call to visited network.
-existence of roaming personal station from other network and location of roaming
personal station to be used for routing within the visited network, and-location of personal station to be used for routing within the home network.
***M******N***

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Non IN-structured PSTN/ISDN
PSTN/ISDN does not apply IN architecture.

PHS MoU***O******P***
Personal Station (PS)TTC
The personal station, as a subscriber communication terminal, is used to make land
mobile radio communications to either personal stations or cell stations.
PS identification code (PSid)
ARIB
The PS Identification Code is information used to identify the PS. It is not recognized by
the user and is used only in the air interface.
PHS Switching Center (PSC)
PHS MoU
This physicalentity provides the switching function for all personal stations. It may
support a part of authentication and location registration function. It may also support
subscribers other than personal stations.
Public Land Mobile Network (PLMN)
ITU-T
PLMN is established and operated by an administration or RPOA (Recognized private
operating agency) for the specific purpose of providing land mobile telecommunication
services to the public. APLMN may be regarded as an extension of a fixed network (e.g.
PSTN) or as an integral part of the PSTN. In the first case, it can be considered as acollection of mobile services switching center (MSC) area within a common numbering
plan (e.g. service access codes) and a common routing plan (e.g. definition of crossover
point); in this case the MSCs are the functional interfaces between the fixed network anda PLMN for call set-up. In the second case, it can be considered as an assemblage of
special logic in existing of future PSTN/ISDN stored program controlled digital local
exchanges, conceptually integrated within a common numbering and routing plan.
***Q******R***
roaming

TTC
Indicate PHS userís action to access originating/terminating service when he moved froma network with his PHS roaming service subscription to another network.

***S***
subscriberdata
ITU-T
All information concerning a specific PS which is required for service provisions,
identification, authentication, routing, call handing, charging, operation and maintenancepurposes. Some subscriber data are refferd to as permanent subscriber data, i.e. they can
only be changed by administrative means. Other data are temporary subscriber data which
may change as a result of normal operation of the system. Some data are referred to as

24

B-NW0.00-04-TS

flexible length data, i.e. further values than those listed may be required in the future.
***T******U******V***
Visited Location Register (VLR)
ITU-T
The location register, other than the home location register used by an PSC to retrieve ,for instance, subscriber profile for handing of calls to or from a roaming PS, currently
located in its area.
visited network
TTC
The network, other than the home network that is visited by PS in roaming state.
***W******X******Y******Z***ABBREVIATIONS
CC
CS
CSid
HLR
IN
IMT2000
ISDN
ITU-T
NDC
PHS
PLMN
PS
PSid
PSC
PSTN
SN
VLR

Country CodeCell Station
Cell Station Identification CodeHome Location Register
Intelligent Network
International Mobile Telecommunication 2000
Integrated Service Digital Network
International Telecommunication Union-Telecommunication Standardization Sector
National Destination Code
Personal Handy-Phone System
Public Land Mobile Network
Personal Station
Personal Station Identification CodePHS Switching Center
Public Switched Telephone Network
Subscriber Number
Visited Location Register

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