Handset Requirements for Roaming

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Handset Requirements for Roaming CDG Reference
Document 172
Ft Lauderdale March, 2008
2
Review of purpose of this document

• The IRT has defined solutions for voice, SMS, and
  data roaming
• Its important to identify a clear set of handset
  requirements to support these solutions
• This document ensures the industry will produce
  handsets designed to roam
• It should be useful for both operators and
  handset developers

3
Current status of the document

• Concept introduced at Jamaica face to face
  meeting
• Draft reference document also provided at that
  time
• No comments to date
• Document now assigned a CDG reference number
  (172)

4
Suggested Next Steps

• Allow a reasonable period of time for more review
• Discuss final comments on a conference call
• Seek approval for publication after incorporating
  final comments

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Backup Slides Document Contents
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Overview of Requirements

• Support for band classes (frequencies)
• OTA provisioning of PRLs
• SMS VMN and Feature Notification Message
• Caller ID behavior
• Standardized Roaming Indicators
• Configurable Voice Mail Access
• Handset Support for Code
• Mobile IP Functionality
• E-PRL Support
• Support for MEID/UIMID
• Support for IMSI_T

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Support for Band Classes (Frequencies)

• Different operators used different frequency
  bands
• In order to roam, the handset must be able to use
  frequencies supported by the visited operator(s)
• GHRC document makes similar band class
  requirement
• Proposed recommendation mirror GHRC bandclass
  requirement
• Bandclass 0, 800 MHz (A and B bands)
• Bandclass 1, 1900 MHz
• Bandclass 5/11, 450 MHz
• Bandclass 6, 2100 MHz
• AMPS, 800 MHz (A and B bands)

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OTA Provisioning of PRLs

• Correctly designed PRLs are critical for roaming
• PRLs are fluid and require constant updates as
  networks and roaming partners are added
• Without some OTA process, PRLs must be updated
  manually, e.g. point of sale
• This is a expensive operational process with a
  bad customer experience
• Handsets should support an OTA update process
  OTASP, OTAPA, DM, etc.

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SMS VMN and Feature Notification Message

• Voice mail notification can be delivered to MS in
  one of two ways
• SMS voice mail notification
• Feature notification message
• Some networks support one and not the other
• Handset should be capable of accepting both
  messages
• Allows for voice mail notification in networks
  using a different notification process than home
  network
• More information can be found in CDG document
  135, Roaming Voice Mail, Deposit, and
  Indicator.

10
Caller ID Behavior

• If a subscriber receives a call while roaming
  from the home market, the international dialing
  code and country code will usually be prepended.
• This is desirable behavior as it allows the
  subscriber to call back the number with changing
  it.
• However, when comparing the number against
  entries in the phone book, the handset should not
  consider the international dialing code or
  country code.
• This is described in more detail in
  International Roaming Caller ID, CDG document
  139.

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Standardized Roaming Indicators

• Handsets expected to roam should support all of
  the standard roaming indicators
• Specified in 3GPP2 document C.R1001-C, Section 8.

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Configurable Voice Mail Access

• The handset should be able to be configured by
  the user such that the voice mail access key can
  be changed.
• This will allow the subscriber to modify the
  voice mail access key dialed digits to match what
  is required to reach voice mail in the visited
  operators network.

13
Handset Support for Code

• The handset should support the functionality
  required for the code solution.
• More information is available in the Plus Code
  Dialing Requirements document, CDG document
  145.

14
Mobile IP Capability

• The handset should support Mobile IP capability.
  Per the Mobile IP Resolution, Mobile IP is the
  agreed upon data architecture for packet data
  roaming.
• More information is available in the Mobile IP
  Resolution document, CDG document 140.

15
E-PRL support

• The handset should support PRL enhancements for
  international roaming.
• More information is available in PRL Enhancement
  for International Roaming, CDG document 86.

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Support for MEID/UIMID

• Devices expected to roaming should support MEID
  (EUIMID for UIMs).
• More information is available in Mobile
  Equipment Identifier Roaming Recommendations,
  CDG document 137.

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Support for IMSI_T

• Devices expected to roaming should support
  IMSI_T.
• IRMs are running out.
• More information is available in "MIN-based IMSI
  to True IMSI Migration Guidelines", CDG document
  126.