PHS MoU Document
B-IW1.01-03-TS
Title: Public Personal Handy-Phone System : Interworking between
public PHS wireless access part operating at bit rates up to 64
kbit/s and 64 kbit/s-based ISDN part of public PHS network
Version: 03
Date: July 31, 1998
PHS MoU Classification: Unrestricted
List of contents:<Summary>
1. Relation with international standards
2. Differences to/from ITU-T Recommendation
3. References
4. Items for Further Study<Text>
1. General
1.1 Objectives of this document
2. Scope of this document
3. Principles
4. Future directions
4.1 General interworking configuration
4.2 Interworking configurations using V5.1/v5.2 interfaces
5. Examples of applications
Annex A GLOSSARY and ABBREVIATIONS
Annex B Network interworking between public PHS wireless access part
operating at bit rates less than 64 kbit/s and 64 kbit/s-based ISDN
part of public PHS network

Number of pages: 10

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 Group1998

PHS MoU Document
B-IW1.01-03-TS
VersionHistory of Revised Versions
Date
Outline01

July 11,1997 Established02

Dec. 19, 1997 Glossary and abbreviations are aligned with
A-GN1.00 (Glossary and Abbreviations).

03

July 31, 1998 Enhancement of 64 kbit/s unrestricted
bearer service at the aspect of interworking.

B-IW1.01-03-TS

Public Personal Handy-Phone System:
Interworking between public PHS wireless access part operating at bit rates
up to 64 kbit/s and 64 kbit/s-based ISDN part of public PHS network< Summary >1. Relation with International Standards
This specification specifies interworking arrangements between a public PHS wireless access part
operating at bit rates up to 64 kbit/s and a 64 kbit/s-based public PHS ISDN part based on ITU-T
Recommendation I.525.

2. Differences to/from ITU-T Recommendations
The following specifications have been deleted from or added to ITU-T Recommendation I.525.
(1) The descriptions related to B-ISDN are deleted.
(2) The descriptions related to Packet Mode Service are deleted.
(3) The following terms used in ITU-T Recommendation I.525 shall be replaced with those of thisspecification as shown in the table below.
Table Summary-1/B-IW1.01 Differences from ITU-T Recommendation I.525
ITU-T Recommendation I.525 terminology
ISDN, 64 kbit/s based ISDNThis specification terminology(64 kbit/s based) public PHS ISDN part

Networks operating at bit rates of less than 64 public PHS wireless access part (operating at bit
kbit/s, Networks which operate at bit rates of less rates up to 64 kbit/s)than 64 kbit/s, <64 kbit/s network etc.
In other words, when the terms in the left column of above table are used in the referred part of
ITU-T Recommendation I.525 text, those shall be replaced by the terms in the right column ofabove table.
(4) Descriptions for defining two parts of a public PHS network (i.e., a public PHS wireless accesspart operating at bit rates up to 64 kbit/s and a 64 kbit/s-based public PHS ISDN part) are added
to main body. Annex A and Annex B of ITU-T Recommendation I.525 were merged to form
Annex B of this specification for describing interworking arrangements between two parts of

B-IW1.01-03-TS(1)

public PHS network. And a new Annex was added. Detailed explanations are shown in the tablebelow.
(5) Descriptions for interworking arrangement between public PHS wireless part operating at 64kbit/s
and public PHS ISDN part are added.

Table Summary-2/B-IW1.01 Differences from ITU-T Recommendation I.525
1. General

B.2 ScopeThis specification defines a public PHS wirelessaccess part and a 64 kbit/s based public PHS
ISDN part.
Descriptions about circuit mode service usable
for unrestricted data up to 64kbit/s (more than
32kbit/s) are added.
Texts are modified in order to describe two partsof public PHS network (i.e. a public PHS
wireless access part operating at bit rates up to 64
kbit/s and a 64 kbit/s-based public PHS ISDNpart).

B.3.1 Interworking configuration

A figure which is based on A.1/I.525 was added.

B.3.2 Key characteristics

Common items of TABLE A.1/I.525 and TABLE
B.1/I.525 are specified.
Information transfer capability for 64 kbit/s
unrestricted data service is added to TABLE
B.1/I.525.
Based on the frame-work of B.3.3, thedescriptions of A.3.3 of ITU-T Recommendation
I.525 are added. Items which are corresponded to
TABLE A.2/I.525 are not included.
Descriptions about circuit mode 64 kbit/s, 8KHz
structured bearer service are added.
Texts are modified for describing on IF1 and IF2.
Descriptions about 3.1 kHz audio are added anddescriptions about Echo canceller are deleted.
Descriptions about enabling of a speechtranscoder in case of public PS to public PS
connection are added.
Descriptions about provision of voice-band dataservice and low bit-rate data are added in
subclause B.3.4.3.1.
Descriptions about interworking arrangements for
64 kbit/s unrestricted data service is added as
subclause B.3.4.3.2.
Specifications are described based on subclause

2. Scope

B.1 General

B.3.3 Service suitable for interworking

B.3.4.1 Interworking between signalling systems
B.3.4.2 Interworking for speech

B.3.4.3 Interworking for data

B.3.4.4 Supplementary services(2) B-IW1.01-03-TSB.3.4.4

3. References
ITU-T Recommendations: I.525 (1996), G.96x series, V.110, X.30
PHS MoU Documents:
B-IF1.xx, B-IF2.xx, IF3.xx series

4. Items for Further Study
None

B-IW1.01-03-TS(3)

B-IW1.01-03-TS

Public Personal Handy-Phone System:
Interworking between public PHS wireless access part operating at bit rates up to 64 kbit/s
and 64 kbit/s-based ISDN part of public PHS network

Contents

1. General ......................................................................................................................................

1

1.1 Objectives of this document ..................................................................................................

1

2. Scope of this document .............................................................................................................. 1
3. Principles ...................................................................................................................................

1

4. Interworking configurations ....................................................................................................... 1
4.1 General interworking configuration ......................................................................................

1

4.2 Interworking configurations using V5.1/V5.2 interfaces ........................................................ 2
5. Examples of applications ............................................................................................................ 2

Annex A GLOSSARY and ABBREVIATIONS ........................................................................

3

Annex B Network interworking between public PHS wireless access part operating at bit rates
up to 64 kbit/s and 64 kbit/s-based ISDN part of public PHS network ............

6

B.1 General ....................................................................................................................... 6
B.2 Scope .......................................................................................................................... 6
B.3 Interworking configuration and network characteristics ........................................... 6

B-IW1.01-03-TSi

1. General
1.1 Objectives of this document
This document specifies the interworking arrangements between a public PHS wireless access part
operating at bit rates up to 64 kbit/s and 64 kbit/s-based public PHS ISDN part in the public PHS
network.
In the text of this specification, the public PHS network is separated into two parts. One is the 64
kbit/s-based “public PHS ISDN part” which is a part of public PHS network including SCP and PSC
and having IF2 for the connection with a public PHS wireless access part. The other is the “Public
PHS wireless access part”. In case of CS type1. a public PHS wireless access part includes publicCSs. In case of CS type2. a public PHS wireless access part includes public CSs and SCP-A. In bothtype. a public PHS wireless access part two types of interfaces: IF1 for the connection to public PSs
and IF2 for the connection to a public PHS ISDN part. The transmission rate of the public PHS
wireless access part is up to 64 kbit/s.
2. Scope of this document
The purpose of this Specification is to describe the interworking arrangements between the public
PHS wireless access part and the public PHS ISDN part in the public PHS network. In thisspecification, following services are described for interworking.
- circuit mode service usable for speech information transfer;- circuit mode service usable for 3.1 kHz audio information transfer;- circuit mode service usable for 32 kbit/s unrestricted data;- circuit mode service usable for 64 kbit/s unrestricted data;
The scope of this specification is only the services terminated to public PSs. Packet mode service is
not described because services terminated to public CSs are out of the scope.
3. Principles
The public PHS wireless part shall follow internationally agreed 64 kbit/s based ISDN interface
standards for interconnecting with the public PHS ISDN part. In particular, they shall ensure time slot
sequence integrity of the information conveyed in a 64 kbit/s channel at the interworking point. Any
adaption and interworking functions to standard ISDN interfaces will be provided within the public
PHS wireless access part if necessary.
4. Interworking configurations
4.1 General interworking configuration
Figure 4-1/B-IW1.01 shows the general reference configuration for interworking. The interworking
function at the point of the network interface includes speed, 3.1 kHz audio signal transcoding and

B-IW1.01-03-TS

1

unrestricted data rate adapting. It is provided in the IWF.

PublicPS

Public PHS
wireless access part

Figure 4-1/B-IW1.01

Public PHS
ISDN part

IWF

General configuration for interworking between a public PHS
wireless access part and a public PHS ISDN part4.2 Interworking configurations using V5.1/5.2 interfaces
Interworking between a public PHS wireless access part operating at bit rates less then 64 kbit/s/equal
to and a 64 kbit/s-based public PHS ISDN part of the public PHS network can be provided using V5
interface (V5.1 or V5.2). Figure 4-2/B-IW1.01 shows general interworking configurations between apublic PHS wireless access part and a public PHS ISDN part using V5 interface.
1
PublicPS

Public PHS
wireless access part

IWF

m

Public PHS
ISDN partV5.1/V5.2
Figure 4-2/B-IW1.01

General V5 interworking configurations between a public PHS
wireless access part and a public PHS ISDN part

5. Examples of applications
Annex B describes an interworking between a public PHS wireless access part and a public PHS
ISDN part of the public PHS network.

2

B-IW1.01-03-TS

Annex A GLOSSARY and ABBREVIATIONS (Normative)
Glossary***A******B******C******D******E******F******G******H******I***
Interworking functions (IWFs)

ITU-T

Functions which include the conversion of physical and electrical states and the mapping of
protocols.
***J******K******L******M******N******O******P***
public Cell Station (public CS)

ARIB

The public cell station carries out mobile radio communication with personal station on land
using public standard.
public Personal Station (public PS)

ARIB

The personal station, as a subscriber communication terminal, is used to make land mobile
radio communications to either personal station or cell station.
*Public PHS ISDN part

PHS MoU

A part of the public PHS network including SCP and PSC and having IF2 for the connection
to a public PHS wireless access part.

B-IW1.01-03-TS3

*Public PHS wireless access part

PHS MoU

A part of the public PHS network. In case of CS type1, a public PHS wireless access part
includes public CSs. In case of CS type2, a public PHS wireless access part includes public
CSs and SCP-A. In both type, a public PHS wireless access part has two types of interfaces:
IF1 for the connection to public PSs and IF2 for the connection to a public PHS ISDN part.
***Q******R******S******T******U******V***V5.1

ITU-T
A 2048 kbit/s interface, which does not support a concentration function, defined by ITU-T
Recommendation G.964 for the connection of an Access Network (AN) to a Local Exchange(LE) for the support of such access types as analogue, ISDN basic access applications andsemi-permanent connections.

V5.2

ITU-T
A set of 2048 kbit/s interfaces up to sixteen, which inherently supports a concentration
function, defined by ITU-T Recommendation G.965 for the connection of an Access Network(AN) to a Local Exchange (LE) for the support of such access types as analogue, ISDN
basic/primary access applications and semi-permanent connections.

***W******X******Y******Z***

4

B-IW1.01-03-TS

Abbreviations
CS

Cell Station

ISDN

Integrated Services Digital Network

IWF

Interworking Function

PCM

Pulse Code Modulation

PHS

Personal Handy-Phone System

PS

Personal Station

PSC

PHS Switching Center

SCP

Service Control Point

UDI

Unrestricted Digital Information

B-IW1.01-03-TS

5

Annex B•Network interworking between public PHS wireless access part operating at bit rates up to
64 kbit/s and 64 kbit/s-based ISDN part of public PHS network (Normative)

B.1 General
A public PHS network consists of two parts: a wireless access part and an ISDN part. In a public PHS
wireless access part users are provided with digital user network access capabilities at 32 or 64 kbit/s for
efficient radio frequency use, whereas a public PHS ISDN part provides 64 kbit/s based digital switching
services.
B.2 Scope
The purpose of this annex is to describe the general arrangements for interworking between a public PHS
wireless access part and a public PHS ISDN part.
B.3 Interworking configuration and network characteristics
B.3.1 Interworking configuration
See Figure B1/B-IW1.01.

Public PHS
wireless
access part

PublicPS

IWF

Public PHS
ISDN part

Figure B1/B-IW1.01 General configuration for interworking between a public PHS
ISDN part and a public PHS wireless access partB.3.2 Key public PHS wireless access part and ISDN part characteristics and related interworking
functions
Table B1/B-IW1.01 identifies the key characteristics of a public PHS wireless access part and an ISDN part,
indicating possible interworking functions to accommodate dissimilar characteristics.
B.3.3 Services suitable for public PHS wireless access part - ISDN part interworking
B.3.3.1 Services suitable for calls from public PHS wireless access part to ISDN part
i)
ii)

6

circuit-mode 32 kbit/s, 8 kHz structured bearer service, usable for speech informationtransfer;
circuit-mode 32 kbit/s, 8 kHz structured bearer service, usable for 3.1 kHz audio informationtransfer;

B-IW1.01-03-TS

Table B1/B-IW1.01 Key public PHS wireless access part and ISDN part characteristics
and possible interworking functions required

Subscriber interface
User-network signalling
Signalling specification

Wireless access part
IWF
DigitalOut-bandSignal mapping
Specification IF1
Signal mapping

Information transfer mode

CircuitInformation transfer capability

Low rate speech

Circuit connection
based on
64 kbit/s
Transcoding

3.1 kHz audio

Transcoding

Low bit-rate data
(32 kbit/s UDI)
64 kbit/s UDI

Rate adapting•••iii)•••iv)

Multiplexing andRate adapting

ISDN part
DigitalOut-bandSpecification IF2 andIF3Circuit

Speech based on
64 kbit/s PCM
3.1 kHz audio based on
64 kbit/s PCM
64 kbit/s UDI
64 kbit/s UDI

circuit-mode 32 kbit/s unrestricted, 8 kHz structured bearer service (see Note 1).
circuit-mode 64 kbit/s unrestricted, 8 kHz structured bearer service (see Note 2).
NOTE 1 - The user rate and the intermediate rate shall be less than or equal to 32 kbit/s forthe low bit-rate data transfer service.
NOTE 2 - The user rate and the intermediate rate shall be less than or equal to 64 kbit/s(higher than 32 kbit/s) for the low bit-rate data transfer service.

B.3.3.2 ISDN bearer services suitable for calls from public PHS ISDN part to wireless access part
i)
ii)
iii)

circuit-mode 64 kbit/s, 8 kHz structured bearer service, usable for speech informationtransfer;
circuit-mode 64 kbit/s, 8 kHz structured bearer service, usable for 3.1 kHz audio informationtransfer;
circuit-mode 64 kbit/s unrestricted, 8 kHz structured bearer service (see Note).
NOTE - In case that the low bit-rate data is selected in a PHS wireless access part, the userrate and the intermediate rate shall be less than or equal to 32 kbit/s, and the ITU-T
V.110/X.30 rate adaption shall be selected for the user information layer 1 protocol when acall terminates through the low bit-rate data transfer service in a public PHS wireless accesspart.

B-IW1.01-03-TS7

B.3.4 Functional requirement for public PHS wireless access part -ISDN part interworking
B.3.4.1 Interworking between signalling systems
The interworking functions between IF1 and IF2 are provided by the IWF in a public PHS wireless accesspart.
B.3.4.2 Interworking for speech and 3.1 kHz audio information
The IWF in a public PHS wireless access part has a transcoder to convert between the low bit-rate speechcoding in a public PHS wireless access part and the standard 64 kbit/s coding in a public PHS ISDN part(see Figure B2/B-IW1.01).

Publ i c PHS W
i rel es s
Acces s Part

I WFPubl i c PHS
I SDN partLow bi t - rat e
encoded s peecha

64 kbi t / sƒ /ÊAPubl i cPS

a: t rans codi ng I W
Fradi o acces s

Figure B2/B-IW1.01 General configuration for interworking between a public PHS ISDN partand a public PHS wireless access part showing transcoding IWF

In the case where there is public PHS wireless access part access at both ends of a connection, and bothpublic PHS wireless access parts are of the same type, the speech transcoders shall be enabled in each IWF.
This case is illustrated in Figure B3/B-IW1.01.

Publ i c
PS

Publ i c PHS
wi rel es s acces s
part
Low bi t - rat e
encoded s peech

IW
F

a

Publ i c PHS
I SDN part
64 kbi t / s
ƒ /ÊA

I WF

a

Publ i c PHS wi rel es sacces s part

Publ i c
PS

Low bi t -rat e
encoded s peechFa: t rans codi ng I W
radi o acces s

Figure B3/B-IW1.01 General configuration for interworking between a public PHS ISDN partand a public PHS wireless access parts both ends of the connection

8

B-IW1.01-03-TSB.3.4.3 Interworking for data
B.3.4.3.1 Voice-band data and low bit-rate data
The voice coding of public PHS wireless access parts can pass voice-band data. When the voice-band datatransmission is required, the IWF in a public PHS wireless access part shall enable a transcoder to convert
between the low bit-rate speech coding in public PHS wireless access part and the standard 64 kbit/s coding
in public PHS ISDN part (see Figure B2/B-IW1.01).
When circuit mode 32 kbit/s data transmission is required, the voice codec must be bypassed. The
mechanism for transmission across the public PHS ISDN part shall be for the low bit-rate of the public PHS
wireless access part (e.g. 32 kbit/s) to be rate-adapted to 64 kbit/s by the IWF. This is illustrated in Figure
B4/B-IW1.01.

Publ i c PHS
wi rel es s acces s
part

Publ i c
PS

I WF

Low bi t- rat e dat a

Publ i c PHS
I SDN part
64 kbi t / sbb: rat e adapt i onradi o acces s

Figure B4/B-IW1.01 General configuration for interworking between a public PHS
ISDN part and a public PHS wireless access part for low bit-rate data
B.3.4.3.2 64 kbit/s unrestricted data
When circuit mode 64 kbit/s data transmission is required, the IWF in a public PHS wireless access partshall multiplex two streams of PHS 32 kbit/s data channel into a 64 kbit/s B-channel in a public PHS ISDN
part. The voice codec must be bypassed.
The mechanism of the IWF for 64 kbit/s unrestricted shall be followed by B-IF1.01. This is illustrated in
Figure B5/B-IW1.01.

St ream 1 ( 32 kbi t / s )Publ i c
PS

Publ i c PHS wi rel es s
I WFacces s part

Publ i c PHS
I SDN partSt ream 2 ( 32 kbi t / s )64 kbi t / s unres t ri ct ed
dat ab: rat e adaptng
i and mul t i pl exi ng
radi o acces s

64 kbi t / sb

Figure B5/B-IW1.01 General configuration for interworking between a public PHS
ISDN part and a public PHS wireless access part for 64 kbit/s
unrestricted data

B-IW1.01-03-TS

9

B.3.4.4 Supplementary service interworking
A public PHS wireless access part may be provided with similar or identical supplementary services tothose in the ISDN part, but with some differences resulting from:- moving from one mobile switching exchange area to another;- roaming to another network offering the same public PHS wireless access part capability.
Frequently, the supplementary services will be required to operate across networks, and interworking
between a public PHS wireless access part and the ISDN part requires interworking of signalling,
notification and indications. Additionally, procedure compatibility may sometimes need to be assured
before interworking of a supplementary service can be allowed.

10

B-IW1.01-03-TS