United States Patent
US Patent 6434377: Procedure for the setup of an emergency call made…
US 6434377 · granted 2002-08-13
| Patent Number | 6434377 |
|---|---|
| Title | Procedure for the setup of an emergency call made by an unidentified subscriber in a wireless local loop |
| Filed | 1999-07-29 |
| Granted | 2002-08-13 |
| Inventor(s) | Simo Penttinen |
| Assignee | Nokia Inc |
| CPC Classification | H04W76/00, H04W4/90, H04W4/00 |
| Number of Claims | 1 |
Abstract
The invention relates to a procedure for the setup of an emergency call made by an unidentified subscriber in a wireless local loop, in which subscriber’s stations (MS) are connected via a radio link over a base transceiver station (BS) to an access node (AN) and from the access node to a local exchange (LE) over a standard V5 interface, in which the subscriber ports are identified by means of an L3 address, and in which procedure subscriber and emergency call identification is carried out during call setup. An emergency call to a predetermined emergency number attempted by a subscriber unidentified and/or undefined in the local exchange is detected, and a free L3 address is selected and the unidentified subscriber’s emergency call is set up using the free L3 address over a V5 interface in accordance with the ordinary call setup procedure.
Claims Summary
1. A procedure for the setup of an emergency call made by an unidentified subscriber in a wireless local loop, in which subscriber’s stations are connected via a radio link over a base transceiver station to an access node and from the access node to a local exchange over a standard V5 interface, in which the subscriber ports are identified by means of an L3 address, and in which procedure subscriber and emergency call identification is carried out during call setup, comprising: