Control of WLAN selection policies in roaming scenarios
First Claim
Patent Images
1. A user equipment (UE) device, comprising:
- processing circuitry and a radio transceiver for both cellular and WLAN (wireless local area network) access, wherein the processing circuitry is configured to;
determine that network access has been acquired from a visited cellular operator and one or more WLANs (wireless local area network),retrieve, in response to said determination, a setting that indicates a preference for IP (internet protocol) address preservation when switching between cellular and WLAN access;
if the preference indicates that IP address preservation is not to be performed, prefer policies for network selection and routing as indicated by ANDSF (access network and discovery selection function) information received from an H-ANDSF (home operator ANDSF) server over information received from a V-ANDSF (visited operator ANDSF) server; and
if the preference indicates that IP address preservation is to be performed, prefer policies for network selection and routing as indicated by the V-ANDSF server over those as indicated by the H-ANDSF server wherein the V-ANDSF server indicates that the visited cellular operator has support for WLAN access using an S2a interface.
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Accused Products
Abstract
The Access Network Discovery and Selection Function (ANDSF) is a function in LTE networks that an operator can use to control how UEs prioritize between different access technologies if non-3GPP access networks such as wireless local area networks (WLANs) are available and can also assist devices to discover available access networks. Schemes are described that introduce flexibility in the control of WLAN selection in roaming scenarios based on HPLMN preferences.
31 Citations
18 Claims
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1. A user equipment (UE) device, comprising:
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processing circuitry and a radio transceiver for both cellular and WLAN (wireless local area network) access, wherein the processing circuitry is configured to; determine that network access has been acquired from a visited cellular operator and one or more WLANs (wireless local area network), retrieve, in response to said determination, a setting that indicates a preference for IP (internet protocol) address preservation when switching between cellular and WLAN access; if the preference indicates that IP address preservation is not to be performed, prefer policies for network selection and routing as indicated by ANDSF (access network and discovery selection function) information received from an H-ANDSF (home operator ANDSF) server over information received from a V-ANDSF (visited operator ANDSF) server; and if the preference indicates that IP address preservation is to be performed, prefer policies for network selection and routing as indicated by the V-ANDSF server over those as indicated by the H-ANDSF server wherein the V-ANDSF server indicates that the visited cellular operator has support for WLAN access using an S2a interface. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A user equipment (UE) device, comprising:
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processing circuitry and a radio transceiver for both cellular and WLAN (wireless local area network) access, wherein the processing circuitry is to; determine that network access has been acquired from a visited cellular operator and one or more WLANs (wireless local area network), retrieve, in response to said determination, a setting that indicates a preference for NSWO (non-seamless WLAN offload) with no IP (internet protocol) address preservation when switching between cellular and WLAN access; if the preference indicates that NSWO is to be performed, prefer policies for network selection and routing as indicated by ANDSF (access network and discovery selection function) information received from an H-ANDSF (home operator ANDSF) server over information received from a V-ANDSF (visited operator ANDSF) server; if the preference indicates that NSWO is not to be performed, prefer policies for network selection and routing as indicated by the V-ANDSF server over those as indicated by the H-ANDSF server wherein the V-ANDSF server indicates that the visited cellular operator has support for WLAN access using an S2a interface. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A user equipment (UE) device, comprising:
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processing circuitry and a radio transceiver for both cellular and WLAN (wireless local area network) access, wherein the processing circuitry is to; determine that network access has been acquired from a visited cellular operator and one or more WLANs (wireless local area network), retrieve, in response to said determination, ANDSF (access network and discovery selection function) information received from a V-ANDSF (visited operator ANDSF) server indicating whether or not the visited cellular operator supports SaMOG (S2a-based Mobility over GTP (general packet radio service tunneling protocol); if the visited cellular operator does not support SaMOG, prefer policies for network selection and routing as indicated by ANDSF information received from an H-ANDSF (home operator ANDSF) server over information received from the V-ANDSF; and
,if the visited cellular operator does support SaMOG, prefer policies for network selection and routine as indicated by the V-ANDSF server over those as indicated by the H-ANDSF server wherein the V-ANDSF server indicates that the visited cellular operator has support for WLAN access using an S2a interface. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification