# US 2018/0027438 A1 · Device and Method of Reporting a WLAN Connection Status > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0027438 A1 - Document ID: US20180027438A1 - Status: Published application - Kind: A1 - Application number: 15/653,538 - Filed: 2017-07-19 - Published: 2018-01-25 - Earliest claimed: 2016-07-19 - Assignees: HTC Corporation - Applicants: HTC Corporation - Inventors: Chih-Hsiang Wu - Web page: https://patentgrep.com/patent/US20180027438A1 ## CPC - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 76/11: Allocation or use of connection identifiers - H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer - H04W 92/02: Inter-networking arrangements - H04W 76/10: Connection setup - H04W 76/18: Management of setup rejection or failure - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A communication device for reporting a wireless local area network (WLAN) connection status in a wireless communication system comprises a storage device for storing instructions and a processing circuit coupled to the storage device. The processing circuit is configured to execute the instructions stored in the storage device. The instructions comprise establishing a cellular connection to a base station (BS) of a cellular network via a cell of the BS; receiving a first Cellular-WLAN Radio Level Integration with Internet Protocol Security (IPsec) Tunnel (CWIP) configuration configuring a first IP address, a first Internet Key Exchange (IKE) identity and a first counter value for establishing a first IPsec tunnel over a WLAN, on the cellular connection from the BS; and transmitting a first WLANConnectionStatusReport message on the cellular connection to the BS, when the communication device has a WLAN connection with the WLAN, wherein the first WLANConnectionStatusReport message indicates “successfulAssociation”. ## Claims ### Claim 1 A communication device for reporting a wireless local area network (WLAN) connection status in a wireless communication system, comprising: a storage device, for storing instructions of: establishing a cellular connection to a base station (BS) of a cellular network via a cell of the BS; receiving a first Cellular-WLAN Radio Level Integration with Internet Protocol Security (IPsec) Tunnel (CWIP) configuration configuring a first IP address, a first Internet Key Exchange (IKE) identity and a first counter value for establishing a first IPsec tunnel over a WLAN, on the cellular connection from the BS; transmitting a first WLANConnectionStatusReport message on the cellular connection to the BS, when the communication device has a WLAN connection with the WLAN, wherein the first WLANConnectionStatusReport message indicates “successfulAssociation”; receiving a second CWIP configuration configuring at least one of a second IP address, a second IKE identity and a second counter value for establishing a second IPsec tunnel, on the cellular connection from the BS, after establishing the first IPsec tunnel over the WLAN; and transmitting a second WLANConnectionStatusReport message on the cellular connection to the BS, when applying all of the at least one of the second IP address, the second IKE identity and the second counter value to successfully establish a second IPsec tunnel, wherein the second WLANConnectionStatusReport message indicates “successfulAssociation”; and a processing circuit, coupled to the storage device, configured to execute the instructions stored in the storage device. ### Claim 2 (depends on 1) The communication device of claim 1, wherein the communication device transmits the first WLANConnectionStatusReport message on the cellular connection to the BS, when the communication device has the WLAN connection with the WLAN and successfully establishes the first IPsec tunnel over the WLAN according to the first IP address, the first IKE identity and the first counter value. ### Claim 3 (depends on 1) The communication device of claim 1, wherein the storage device further stores the instruction of: transmitting a third WLANConnectionStatusReport message indicating a failure to the BS, when failing to establish the first IPsec tunnel over the WLAN. ### Claim 4 (depends on 3) The communication device of claim 3, wherein the failure is “failureWlanUnavailable”, “failureWlanRadioLink”, or “failureTimeout”. ### Claim 5 (depends on 1) The communication device of claim 1, wherein the communication device receives the second CWIP configuration configuring the at least one of the second IP address, the second IKE identity and the second counter value, when the communication device has established the first IPsec tunnel over the WLAN to a security gateway. ### Claim 6 (depends on 1) The communication device of claim 1, wherein the communication device transmits the second WLANConnectionStatusReport message on the cellular connection to the BS, after updating the first counter value to the second counter value. ### Claim 7 (depends on 1) The communication device of claim 1, wherein the communication device transmits the second WLANConnectionStatusReport message on the cellular connection to the BS, after updating the first IP address to the second IP address. ### Claim 8 (depends on 1) The communication device of claim 1, wherein the storage device further stores the instruction of: establishing the second IPsec tunnel to a first security gateway according to a second pre-shared key, if the second CWIP configuration comprises the second counter value but does not comprise the second IP address; wherein the second pre-shared key is derived according to the second counter value and a key KeNB. ### Claim 9 (depends on 1) The communication device of claim 1, wherein the storage device further stores the instruction of: establishing the second IPsec tunnel to a second security gateway according to a first pre-shared key, if the second CWIP configuration comprises the second IP address but does not comprise the second counter value; wherein the first pre-shared key is derived according to the first counter value and a key KeNB. ### Claim 10 (depends on 1) The communication device of claim 1, wherein the storage device further stores the instruction of: establishing the second IPsec tunnel to a second security gateway according to a second pre-shared key, if the second CWIP configuration comprises the second IP address and the second counter value; wherein the second pre-shared key is derived according to the second counter value and a key KeNB. ### Claim 11 A communication device for reporting a wireless local area network (WLAN) connection status in a wireless communication system, comprising: a storage device, for storing instructions of: establishing a cellular connection to a base station (BS) of a cellular network via a cell of the BS; receiving a Cellular-WLAN Radio Level Integration with Internet Protocol Security (IPsec) Tunnel (CWIP) configuration configuring a first IP address, an Internet Key Exchange (IKE) identity and a counter value for establishing an IPsec tunnel over a WLAN, on the cellular connection from the BS; and transmitting a WLANConnectionStatusReport message on the cellular connection to the BS, when the communication device has a WLAN connection with the WLAN and successfully establishes the IPsec tunnel according to the first IP address, the IKE identity and the counter value, wherein the WLANConnectionStatusReport message indicates “successfulAssociation”; and a processing circuit, coupled to the storage device, configured to execute the instructions stored in the storage device. ### Claim 12 (depends on 11) The communication device of claim 11, wherein the cellular connection is a LTE connection or a 5G connection. ### Claim 13 (depends on 12) The communication device of claim 12, wherein the LTE connection and the 5G connection comprise that the communication device has a Cell Radio Network Temporary Identifier (C-RNTI) configured by the BS to communicate with the BS. ### Claim 14 (depends on 12) The communication device of claim 12, wherein the LTE connection comprises a radio resource control (RRC) connection, or comprises the RRC connection and a data radio bearer (DRB). ### Claim 15 (depends on 11) The communication device of claim 11, wherein the CWIP configuration is a LTE/WLAN Radio Level Integration with IPsec Tunnel (LWIP) configuration or a 5G/WLAN Radio Level Integration with IPsec Tunnel (5GWIP). ### Claim 16 (depends on 14) The communication device of claim 14, wherein the storage device further stores the instructions of: receiving a second IP address from the cellular network over the RRC connection in a Non-Access-Stratum (NAS) message or over the DRB; receiving a radio resource control (RRC) message comprising a LWIP configuration; performing an association procedure to connect to the WLAN configured by the LWIP configuration; and initiating an establishment of the IPsec tunnel.