US 10,382,933 B2Granted

System and method for establishing an emergency call over a wireless LAN network

AssigneeReliance Jio Infocomm Limited

InventorsAnil Pawar, Sagar Mishra

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Abstract

Embodiments of the present invention relate to identifying and routing an emergency call for a user equipment to an emergency center, thereby establishing the emergency call with the emergency center over a wireless LAN network. The establishing of said emergency call is performed by a network entity and modules present therein. A P-CSCF module analyses a request for establishing the emergency call received from the user equipment, wherein the request comprises a destination emergency number, a subscriber identity and an access type through which the request is made. The P-CSCF module transmits a location retrieval request to a PCRF module for retrieving a location information of the user equipment. Subsequently, an E-CSCF module receives a routing information from a LRF module based on the location information, pursuant to which the E-CSCF module routes the emergency call to the emergency center and establishes the emergency call with the emergency center.

Claims7

Dependent claims

A method for establishing an emergency call over a wireless local area network (LAN), the method being performed by a network entity, the method comprising:

establishing the emergency call utilizing the network entity, the network entity being selected from one of an E-ULTRAN Node B (eNodeB), a Base Transceiver Station (BTS), Base Station Controller (BSC) and a Radio Network Controller (RNC), wherein the establishing of said call comprises steps of:
receiving, by a proxy call session control function (P-CSCF) module present within the network entity, a request to establish the emergency call from the user equipment, wherein the request comprises a destination emergency number, a subscriber identity and an access type through which the request is made;
analyzing, by the P-CSCF module present within the network entity, the request received from the user equipment;
transmitting a location retrieval request to a policy and charging rule function (PCRF) module present within the network entity, in an event the destination emergency number matches with a pre-configured list of emergency numbers and the access type belongs to the wireless LAN, wherein the location retrieval request is transmitted by the P-CSCF module;
receiving a location information of the user equipment from the PCRF module, wherein the location information is received by the P-CSCF module;
receiving a routing information from a location retrieval function (LRF) module present within the network entity, wherein
the routing information is received by an emergency call session control function (E-CSCF) module present within the network entity, based on the location information of the user equipment,
the routing information is received based on a request transmitted by the E-CSCF module to the LRF module, and
the routing information is received based on the comparison of the destination emergency number with the pre-configured list of emergency numbers;
and
routing the emergency call to an emergency center based on the routing information wherein the emergency call is routed by the E-CSCF module present within the network entity;
establishing the emergency call with the emergency center over the wireless local area network.

9 more elements

A network entity for establishing an emergency call over a wireless local area network (LAN), the network entity comprising:

the network entity that establishes the emergency call, the network entity being selected from one of an E-ULTRAN Node B (eNodeB), a Base Transceiver Station (BTS), Base Station Controller (BSC) and a Radio Network Controller (RNC), wherein the network entity further comprises:
a proxy call session control function (P-CSCF) module present within the network entity which:
receives a request to establish the emergency call from the user equipment, wherein the request comprises a destination emergency number, a subscriber identity and an access type through which the request is made,
analyzes the request received from the user equipment, and
transmits a location retrieval request to a policy and charging rule function (PCRF) module present within the network entity, in an event the destination emergency number matches with a pre-configured list of emergency numbers and the access type belongs to the wireless LAN, wherein the location retrieval request is transmitted by the P-CSCF module;
the PCRF module which transmits a location information of the user equipment to the P-CSCF module;
an emergency call session control function (E-CSCF) module present within the network entity, which receives the location information from the P-CSCF module;
and
a location retrieval function (LRF) module present within the network entity, which transmits a routing information to the E-CSCF module, wherein the routing information is transmitted based on a request received from the E-CSCF module,
the routing information is transmitted based on the location information of the user equipment, and
the routing information is transmitted based on the comparison of the destination emergency number with the pre-configured list of emergency numbers,
wherein the E-CSCF module also
routes the emergency call to an emergency center based on the routing information, and
establishes the emergency call with the emergency center over the wireless local area network.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/821,491Filed 22 Nov 2017
Priority: IN 20162104016424 Nov 2016
Published: US 2018/0146359 A124 May 2018
Granted: 13 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04W 4/90
Services specially adapted for wireless communication networks; Facilities therefor: services for handling of emergency or hazardous situations,…
H04L 65/1016
Architectures or entities: iP multimedia subsystem [IMS]
H04L 65/1023
Gateways: media gateways
H04L 65/1045
Architectures or entities: proxies, e.g. for session initiation protocol [SIP]