Emergency services support for non-cellular wireless access
First Claim
1. A method to obtain information for establishing emergency services sessions via a non-3GPP wireless access network, the method comprising:
- by a wireless device, while roaming on a visited Public Land Mobile Network (VPLMN);
sending to a domain name system (DNS) server a first query for emergency services Public Land Mobile Network (PLMN) information;
receiving from the DNS server, in response to the first query, a first reply that includes a list of one or more PLMNs that support emergency services sessions via the non-3GPP wireless access network;
selecting a PLMN from the list of one or more PLMNs;
sending to the DNS server a second query for emergency services evolved Packet Data Gateway (ePDG) information for the selected PLMN;
receiving from the DNS server, in response to the second query, a second reply that includes a list of Internet Protocol (IP) addresses for ePDGs that support emergency services sessions via the non-3GPP wireless access network for the selected PLMN;
sending, to a DNS server located in a country in which the wireless device is roaming, a third query for emergency services local number information; and
receiving, from the DNS server located in the country in which the wireless device is roaming, a third reply that includes a list of emergency services local numbers applicable for the country in which the wireless device is roaming and categorized by emergency services type.
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Accused Products
Abstract
Apparatus and methods to support emergency services sessions by network elements and by a wireless device are disclosed. The wireless device, when roaming to a visited country/region, queries a network-based server to obtain information for Public Land Mobile Networks (PLMNs) that support emergency services sessions via non-cellular wireless access in the visited country/region. The network-based server responds with a list of PLMNs from which the wireless device selects a PLMN. The wireless device further queries the network-based server to obtain information for evolved Packet Data Gateways (ePDGs) for a selected PLMN and receives from the network-based server a list of Internet Protocol (IP) addresses for ePDGs that support emergency services sessions via non-cellular wireless access for the selected PLMN. The wireless device further queries the network-based server for local numbers of the visited country for establishing emergency services sessions and receives a categorized list of local numbers for emergency services.
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Citations
18 Claims
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1. A method to obtain information for establishing emergency services sessions via a non-3GPP wireless access network, the method comprising:
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by a wireless device, while roaming on a visited Public Land Mobile Network (VPLMN); sending to a domain name system (DNS) server a first query for emergency services Public Land Mobile Network (PLMN) information; receiving from the DNS server, in response to the first query, a first reply that includes a list of one or more PLMNs that support emergency services sessions via the non-3GPP wireless access network; selecting a PLMN from the list of one or more PLMNs; sending to the DNS server a second query for emergency services evolved Packet Data Gateway (ePDG) information for the selected PLMN; receiving from the DNS server, in response to the second query, a second reply that includes a list of Internet Protocol (IP) addresses for ePDGs that support emergency services sessions via the non-3GPP wireless access network for the selected PLMN; sending, to a DNS server located in a country in which the wireless device is roaming, a third query for emergency services local number information; and receiving, from the DNS server located in the country in which the wireless device is roaming, a third reply that includes a list of emergency services local numbers applicable for the country in which the wireless device is roaming and categorized by emergency services type. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 18)
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9. A wireless device comprising:
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wireless circuitry including one or more antennas; processing circuitry including one or more processors communicatively coupled to a memory storing instructions and to the wireless circuitry; and an emergency services support module communicatively coupled to the processing circuitry, wherein execution of the instructions on the one or more processors causes the wireless device to; send to a domain name system (DNS) server a first query for emergency services Public Land Mobile Network (PLMN) information, the first query including an indication that the wireless device is roaming and a unique identifier for a country in which the wireless device is operating; receive from the DNS server a first reply that includes a list of one or more PLMNs that support emergency services sessions via the non-3GPP wireless access network, wherein each PLMN in the list of one or more PLMNs is associated with the country specified by the unique identifier; select a PLMN from the list of one or more PLMNs; send to the DNS server a second query for emergency services evolved Packet Data Gateway (ePDG) information, the second query including an indication of the PLMN selected from the list of PLMNs; receive from the DNS server a second reply that includes a list of Internet Protocol (IP) addresses for ePDGs that support emergency services sessions via the non-3GPP wireless access network, wherein each ePDG identified in the list of IP addresses is associated with the selected PLMN; and send, to a DNS server located in the country in which the wireless device is operating, a third query for emergency services local number information; and receive, from the DNS server located in the country in which the wireless device is operating, a third reply that includes a list of emergency services local numbers categorized by emergency services type. - View Dependent Claims (10, 11, 12, 13)
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14. An apparatus configurable for operation in a wireless device, the apparatus comprising:
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one or more processors communicatively coupled to a memory storing instructions that, when executed by the one or more processors, cause the wireless device to; send to a domain name system (DNS) server a first query for emergency services Public Land Mobile Network (PLMN) information, the first query including a unique identifier for a region in which the wireless communication device is operating; receive from the DNS server, responsive to the first query, a first reply that includes a list of one or more PLMNs that support emergency services sessions via the non-3GPP wireless access network, each PLMN in the list of one or more PLMNs being associated with the region specified by the unique identifier; select a PLMN from the list of one or more PLMNs; send to the DNS server a second query for emergency services evolved Packet Data Gateway (ePDG) information for the selected PLMN; receive from the DNS server, in response to the second query, a second reply that includes a list of Internet Protocol (IP) addresses for ePDGs that support emergency services sessions via the non-3GPP wireless access network for the selected PLMN; send, to a DNS server located in a country in which the wireless device is roaming, a third query for emergency services local number information; and receive, from the DNS server located in the country in which the wireless device is roaming, a third reply that includes a list of emergency services local numbers applicable for the country in which the wireless device is roaming and categorized by emergency services type. - View Dependent Claims (15, 16, 17)
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Specification