Wireless emergency services protocols translator between ANSI-41 and VoIP emergency services protocols
View Patent ↗A protocol converter or translator between ANSI-41 ORREQs and VoIP V2 messaging. The protocol converter may alternatively (or also) provide conversion between GMS MAP and VoIP V2 messaging. Interaction of VSPs with a Mobile Positioning Center (MPC) or a Gateway Mobile Location Center (GMLC) is permitted, as is interaction of wireless carriers with a Voice Positioning Center (VPC). In this way existing GMLCs or MPCs may be used to service VoIP 9-1-1 calls. Moreover, operators of Voice Positioning Centers (VPCs) who implement wireless offerings can re-use their existing VPCs to service wireless 9-1-1 calls.
1. Apparatus to translate emergency services protocol call setup information from ANSI-41 ORREQ to VoIP, comprising:
a receiver to receive, from a mobile switching (MSC), an ANSI-41 ORREQ containing at least one of a call back number (CBN) and emergency service routing digits (ESRD);
a converter to convert said at least one of a CBN and an ESRD to a VoIP request;
a transmitter to send, to a VoIP positioning center (VPC), said VoIP request; and
a VoIP receiver to receive, from said VoIP positioning center (VPC), said VoIP request including at least one of an emergency service query key (ESQK) and an emergency service routing number (ESRN), said VoIP request having said at least one of an ESQK and an ESRN inserted in at least one of a designated field;
whereby said ORREQ permits setup of an emergency services call with at least one of an ISDN User Part (ISUP) and Multi-Frequency (MF) signaling.
2. Apparatus to translate emergency services protocol call setup information from ANSI-41 ORREQ to VoIP according to claim 1 , wherein said at least one of a designated field comprises:
a DialedDigits field;
a Mobile Directory Number (MDN) field;
a BillingDigits field; and
a GenericDigits field.
3. A method to translate emergency services protocol call setup information from ANSI-41 ORREQ to VoIP, comprising:
receiving, from a mobile switching center (MSC), an ANSI-41 ORREQ containing at least one of a call back number (CBN) and emergency service routing digits (ESRD);
converting said at least one of a CBN and an ESRD to a VoIP request;
sending, to a VoIP positioning center (VPC), said VoIP request; and
receiving, from a VoIP positioning center (VPC), said VoIP request including at least one of an emergency service query key (ESQK) and an emergency service routing number (ESRN) inserted therein in at least one of a designated field;
whereby said ORREQ permits setup of an emergency services call over at least one of ISDN User Part (ISUP) and Multi-Frequency (MF) signaling.
4. The method to translate emergency services protocol call setup information from ANSI-41 ORREQ to VoIP according to claim 3 , wherein said at least one of a designated field comprises:
a DialedDigits field;
a Mobile Directory Number (MDN) field;
a BillingDigits field; and
a GenericDigits field.