CDMA + Code Dialing Options

CDMA + Code Dialing Options

CDMA 450 Roaming Conference London, England

Presented by Libby Mackay, March 2005 With contributions from:

Agenda

• What is plus code dialing

• Why utilize plus code dialing

• Solutions

– Network based solutions – Handset based solution

• Appendix

– Additional documentation – CDG Resolution

CDMA Plus Code Dialing – What is it?

• Plus code dialing allows a subscriber to easily place an

international call without having to memorize each International Access Code (IAC) per visited country

• The subscriber simply pushes a key on their handset and the IAC

is dialed for them

• Plus code dialing does not provide the country code, city code,

CDMA + Code Dialing – Why do it?

• Ease of use - Many subscribers do not know what an international

access code is

+

• Practicality - It is not convenient for subscribers to carry a piece of

paper that lists the international access codes

+

• Simplicity - Customers require simplicity in roaming service,

particularly when utilizing roaming service outside their home country when things can get quite complex

=

• Revenue - Carriers cannot generate roaming revenue if customers

CDMA + Code Dialing – Why?

• Based on this carrier feedback, the CDG International Roaming

Team passed a resolution agreeing to pursue plus code dialing for CDMA carriers.

• For CDG members, the resolution can be viewed on the CDG

website at

http://www.cdg.org/cdg/CDGExecOffice/files/2003.1_Plus_Code_B oard_Resolution_CDG.pdf

CDMA + Code Dialing - Solutions

There are a variety of ways to implement CDMA plus code dialing

1. Network standards based solution (best solution when implemented consistently by all or most CDMA carriers)

a. Long term solution - Standards based solution exists

*

2. Handset based solution – (useful prior to consistent network based implementation)

*In 2003 the CDMA Development Group (CDG) International Roaming Team (IRT)

determined the long term network based solution to be the preferred option.

CDMA + Code Dialing – Network based solutions

Long term

•

The standards for this solution are specified in

TIA/EIA/IS-875 and TIA/EIA/IS-2000.5-C

– “Plus code dialling relieves the user of the need to dial an international access prefix, which may vary between countries and carriers.

– This capability allows telephony addresses to be entered, received, displayed, stored and transmitted in an international format (full ITU-T E.164 number, including country code).

– When addresses are entered by a user, the MS user interface can provide an input aid, such as a key marked with a “+” sign, to indicate that the address is international.

– When displayed by the MS, they can be identified by a visual device, such as a “+” prefix.

– When received, transmitted, or stored, an international indicator can be included with the address digits.

– It will be the responsibility of the network to ignore the international indicator when attached to a national number.

– This allows users to store and dial all phone numbers in a consistent format, which is particularly useful for international travellers.”

CDMA + Code Dialing – Network based solutions

Long term network standards based

solution implementation requirements

Step 1: Requires a software update to serving

carrier Mobile Service Switching Center (MSC)

– Status below for some MSC vendors:

• Ericsson MSC V5.1.1; HLR V5.1 Update available now • Lucent R24.0 Update tentatively available 1H05

• Nortel MTX14 Update tentatively available 3Q06 • Motorola Still working to confirm availability • Samsung Still working to confirm availability

– You must work with your infrastructure vendor to

CDMA + Code Dialing – Network based solutions

• Step 2: Mobile Station requirements

– Requires a change to terminals to add the plus

to the key pad

– Requires the ability to display and store the +

symbol

– Ability to originate an international call

• Step 3: Billing

– MSC must be able to represent a plus code

origination in an “acceptable” format in a CDR

– Billing system must be able to process altered

CDMA + Code Dialing – Network based solutions

Short term network based solution *XY

• Roaming subscriber enters *99 in place of the IAC

and originating MSC translates *99 to the correct

IAC

• *XY = *99 is being suggested but is not

mandatory

• Originating MSC sends Initial Address Message

(IAM) to International PSTN

• This is the preferred short term solution by

carriers who responded to the CDG survey with a

preference

MS MSC

Dial digits + SEND (*99-CC-3-6678-4558) call setup (IAC-CC-3-6678-4558) 1 2 3 Convert dial digits

ex.) *99-CC-3-6678-4558 Æ IAC-CC-3-6678-4558

1. The user dials *99-CC-3-6678-4558.

2. Originating MSC translates to IAC-CC-3-6678-4558.

3. Originating MSC sends IAM to International PSTN.

Short term network based solution (*XY)

Short term network based solution (*XY)

CDG/IRT proposes “*99” to initiate + Code Dialing as a default value. HL R MSC/VLR Signaling Network _HL R MSC/VLR Home Network Network Boundary MS Case 1 Roamer MS Homer MS Roamer Case 2 PSTN Serving Network Case 1

Roamer dials *99+County Code (CC)+ Mobile Dialable Number (MDN).

(e.g. *99-81-80-5066-9360) Case 2

Roamer dials *99+CC+PSTN Number. (e.g. *99-81-3-6678-4558)

CDMA + Code Dialing – Network based solutions

• *XY Implementation requirements

– Home Operator

• Change translations to allow *XY for their own

customers who might happen to dial this prefix on

their home network

• Check with billing vendor to ensure *XY calls rate

properly

– MSC Provider

• No impact

– Serving Carriers

• To provide *XY plus code dialing by changing

translations in their switch to recognize the dialed

digits and translate to the IAC

CDMA + Code Dialing – Handset based solution

Handset based solution

– Requires the use of a lookup table in the

handset

– Does not rely on other carriers to implement

any plus code dialing solution

– This option has been discussed at CDG IRT

meetings and is under consideration

– Additional documents can be found on the

Appendix

• Additional reference documents on plus code

dialing

– http://www.cdg.org/members_only/teams/IntRoaming/document_archi ve.asp

CDG Resolution

• The CDG Executive Board and supporting carrier members

unanimously agreed on the need and desire to implement “+ code” dialing in all IS-95 and IS-2000 based CDMA networks and terminal devices. We further support the uniform implementation of this capability by a cutoff date of 1 July 2004.

• “+ Code” dialing is the capability for a mobile subscriber to access

the International Direct Dial (IDD) Code in any market by inputting the “+” symbol with the dialed number. This benefits that this capability offers to the subscriber extends beyond IDD code access. Subscribers enjoy the convenience of easy storing and recall of numbers in address books as well as simplified use of Short Message Services (SMS).

• The “+ code” is ubiquitous to GSM services today and GSM

subscribers are accustomed to its use. As CDMA2000 expands globally and as CDMA2000 networks attract a greater number of former GSM users, it is important that capabilities such as “+

CDG Resolution

• The CDG Board recognizes that implementation of this capability

will require software modifications by infrastructure and terminal vendors and hardware modifications by terminal vendors. All parties must also work together to test the capabilities prior to commercial service. The Board further encourages active

discussion with the vendor community to discuss how the

required modifications can be made with minimum complexity and in the time-frame stated above.

• While the implementation of “+ code” dialing may not bring direct

revenue benefits to the CDMA carriers or vendors, it is a critical capability which will increase customer satisfaction and the competitiveness of CDMA networks in the global market place.

2003 CDMA + Code CDG Board Resolution

• ALLTEL • Bell Mobility • BellSouth International • China Unicom • KDDI • LG Telecom • Nextel Communications • Qwest • SK Telecom • Sprint

• Telecom New Zealand

• Telstra Mobile

• Telus Mobility

• US Cellular

• Verizon Wireless

This Resolution is further endorsed by the following carriers:

• APBW

• Hutchison CAT

• Hutchison Hong Kong

THANK YOU

CDMA 450 Roaming Conference London, England

Presented by Libby Mackay, March 2005

[email protected]

+ 1 858 651-0836 – desk + 1 816 210-1184 - PCS