METHOD FOR SUPPORTING AN EMERGENCY CALL, WIRELESS TRANSMISSION / RECEIVING UNIT FOR PERFORMANCE OF AN EMERGENCY CALL, METHOD IMPLEMENTED IN A BASIC STATION, AND A BASIC STATION FOR SUPPORTING AN EMERGENCY CALL

摘要

1. A way to support an emergency call, the method is that:! a wireless transmit / receive unit (WTRU) receives capability information from wireless base stations regarding emergency call capabilities of base stations and an indication of whether emergency call capability is currently active at base stations; ! The WTRU selects a base station having an emergency call capability and whose emergency call capability is currently active; and! The WTRU establishes an emergency call through the selected base station by sending an emergency message along with an emergency call indication. ! 2. The method of claim 1, wherein the capability information is included in one of the associative response message, the authentication response message, and the subscriber station basic capabilities response message (SBC-RSP). ! 3. The method of claim 1, wherein the emergency call indication is provided by using Service Flow Identification (SFID), Quality of Service (QoS) parameter, or an Ethernet type field of a Media Access Control (MAC) frame. !four. The method of claim 1, wherein the emergency call indication is provided by using emergency base station identification (BSID) reserved for the base station. ! 5. The method according to claim 1, in which the wireless network is a wireless regional area network (WMAN) based on IEEE 802.xx. ! 6. The method according to claim 5, in which the WTRU establishes an emergency call through the selected base station after it fails to establish an emergency call over a wireless cellular network. ! 7. The method according to claim 1, in which the location information of the WTRU is embedded in the ex