Emergency Call Requirements for IP Telephony Services in Japan draft-arai-ecrit-japan-req

1
Emergency Call Requirementsfor IP Telephony
Services in Japan draft-arai-ecrit-japan-req

• Hideki Arai Motoharu Kawanishi
• arai859_at_oki.com kawanishi381_at_oki.com
• Oki Electric Industry Co., Ltd.

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Background

• Requirements shown in this draft are based on the
  draft report from the Ministry of Internal
  Affairs and Communications (MIC).http//www.soumu
  .go.jp/joho_tsusin/eng/Releases/Telecommunications
  /news050128_7.html
• This report focuses on VoIP especially, because
  the IP telephony service with E.164 number has
  spread rapidly as an alternative to PSTN
  telephone. Video, text, data etc. are still
  further study.
• Citizens point of view Emergency call of IP
  telephony services should be equivalent to the
  traditional emergency call, 110 for the police,
  118 for the coast guard, and 119 for fire and
  ambulance.
• Emergency call acceptance organizations point of
  view It should be easy to migrate from the
  existing system to IP telephony system. And IP
  telephony environment should provide the same
  functionalities as the PSTN environment.

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Traditional Emergency Call
Presenting reporters address based on
caller-ID. Acquiring reporters caller-ID and
address from the operator if the reporter called
by CLIR ()
Translating dialed 11x into the telephone
number of the correct office that covers the area
where the reporter resides
Presenting and acquiring geographical location
information
Getting emergency call to correct office
Police
ISDN
52 offices
Local Exchange Office
Local Exchange Office
Fire Ambulance
PSTN
ISDN or Analog leased line
Subscriber
Approx. 900 offices
The highest priority must be given to emergency
calls
Keeping call connection unless the office
terminated the call
Allowing offices to acquire caller-ID even if
the reporter called by CLIR
Taking priority over all other calls
Keeping connection
CLIP oracquiring caller-ID
Coast Guard
ISDN
11 offices
To acquire the reporters address,each office
has also lines for data communication with
operators.
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Assumed Network Model

• Two types of network configuration
• Emergency call reception office is connected to
  IP network via PSTN using existing emergency
  line, and
• Connected directly to IP telephony network via a
  new IP line
• But VoIP only at this stage

PSTN model
All IP model
IP network
IP network
PSTN
Subscriber
Subscriber
Office
Office
Each office uses another line (e.g. IP-VPN)
for acquiring the geographical location
information of the reporter from an operator.
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IP Telephony Requirements for Emergency Messages
in Japan (1)

• Connection to ECRO
• PSTN Voice thru ISDN, and GLI thru wide area
  ethernet.
• All IP Voice thru VoIP network, and GLI thru
  wide area ethernet immediately and thru the same
  network as Voice in the not-too-distant future.
• Getting Emergency Message to Correct ECRO
• Emergency call MUST be got to the correct ECRO,
  which covers where the reporter is present.
• Emergency call MUST be redirected to an
  alternative facility that the organization
  designates as an alternative reception office, in
  case the original ECRO could not do its duty due
  to a disaster etc.
• Information for identifying the operator who can
  provide the reporters subscription information
  MUST be presented to ECRO.

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IP Telephony Requirements for Emergency Messages
in Japan (2)

• Keeping connection and Reversing call
• Emergency call MUST NOT be terminated unless ECRO
  terminated it, even though the reporter hung up.
• Reporters terminal MUST be rung up from ECRO if
  ECRO intends to resume the conversation with the
  reporter during keeping connection would be
  activated.
• Presenting and Acquiring Calling Line
  Identification
• Reporters caller-ID MUST be presented to ECRO
  unless the reporter dials the restriction code
  followed with 11x.
• ECRO MUST be allowed to acquire the caller-ID
  even though the reporter dialed with the
  restriction code.

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IP Telephony Requirements for Emergency Messages
in Japan (3)

• Presenting and Acquiring Geographical Location
  Information
• GLI that the reporter is present MUST be
  presented to ECRO.
• GLI MUST consist of
• Fixed IP-phone subscribers name, address,
  address code and telephone number
• Portable/Mobile IP-phone subscribers name,
  place of dispatch information, telephone number,
  and mobile-use or not.
• Priority over other calls
• Emergency call MUST have priority over all other
  calls in any case.
• Preventing spoofing
• Operator MUST prevent a malicious call pretending
  the place of dispatch.