The invention relates to a collision alerting method for a cyclist according to the preamble of Claim 1 , in which method the cyclist generates an alert signal by means of a short-range radio communication means and the object to be alerted receives the alert signal by means of a mobile phone, converted into an alert tone.

In the invention, two or more mobile phones located near each other can communicate with each other in such a way that one gives a signal over a short-range radio path and the other interprets it as an alert.

The mobile phones may have a Bluetooth feature or RFID or some other similar short- range radio technology for the exchange of information. The invention relates to third generation UMTS (Universal Mobile Telecommunications System) terminals, all different kinds of GSM applications such as: WAP (Wireless Application Protocol), HSCSD (High Speed Circuit Switched Data), GPRS (General Packet Radio Service), HSDPA technology, EDGE (Enhanced Data Rates for GSM Evolution) as well as CDMA (Code Division Multiple Access) phones and IMT (International Mobile Telecommunication) 2000 terminals. The invention also relates to PDAs.

According to the known art, mobile phones are capable of sending messages, SMS, MMS or other messages, to each other but they have so far been written by means of the keyboard of the mobile phone, which is a slow method when there is an urgent need to alert another party.

The problem with the above-described technology is the lack of time to handle a phone when a cyclist, for example, wants to tell a person that the cyclist is going to pass soon "watch out, I'm driving at quite a high speed". On the other hand, the receiving person is not immediately ready to read the message either.

This invention aims at eliminating the defects of the above-described technology and providing a whole new type of method by which it is possible to quickly send an alert to a person who is walking, roller-skating or moving in some other way and who is going to be passed, by means of a Bluetooth feature or RFID or some other similar short-range radio technology implemented in a mobile phone combined with a "bell" technique. This is also applicable to motorists who can then constitute the mobile phone B, i.e. the party to be alerted. For example, when a motorist approaches a pedestrian in the dark, the motorist receives an alert if the pedestrian uses the setting A in his/her mobile phone.

This is further applicable to finding a friend in a crowd. In this instance, the mobile phones are defined as a pair in advance. The mobile phone can be replaced with some other device capable of receiving information by the same short-range radio technology.

When using Bluetooth, the alert is given at a distance of approximately 100 meters, meaning a reaction time of approximately 6 seconds for an object proceeding at a speed of 60 km per hour. A bicycle can reach this speed in certain circumstances. If the speed of a car is 100 km per hour, the reaction time is less than 4 seconds.

The mobile phones contain a system for giving an alert tone when they approach each other. In this instance, both the mobile phones are activated for "bell" operation. The mobile phone of the cyclist, for example, is activated into the "alerting phone" and the mobile phone of the pedestrian or roller-skater or the like is activated into the "phone to be alerted". Besides, it is possible to activate both of them into both types.

The invention is based on that both the mobile phones passing each other have the same short-range radio technologies, such as Bluetooth, and that both the mobile phones have an integrated "bell device" which detects the approach of mobile phones and gives an alert tone immediately.

The mobile phones contain a Bluetooth transceiver or a RFID transceiver or the like.

A mobile phone (2) receives signals sent from a mobile phone (1), such as from a UMTS terminal and containing information about the approaching collision danger, by means of the Bluetooth transceiver (or the RFID or the like), and converts each of them into alert information required by the same, in accordance with the different phone types of each manufacturer. More particularly, the method according to the invention is characterized in that the mobile phones (1 and 2) continuously send control signals to the Bluetooth transmitter (or the RPID transmitter) at given intervals and add alert information to them. The former takes place according to the different phone types of each manufacturer. Thereafter, the phones send them, by using the Bluetooth transceiver (or RFID) devices to the other mobile phone located nearby. Similarly to the first mobile phone, the second mobile phone also contains, in addition the actual receiving Bluetooth device, "an alert device" registrating "the alert event", i.e. the approch of the mobile phone at a high speed. The bell system of the receiving mobile phone has prioritized the "alerting" operation, meaning that it warns the user against being run over by a bicycle, for example, by giving an alert tone immediately, irrespective of the current state of the mobile phone. This takes place according to the different phone types of each manufacturer. The invention results in an extremely fast and easy exchange of information between mobile phones. In this instance, the information consists of very small pieces of alert information.

The mobile phones contain systems that are activated by the setting "bell" and repetitiously send alert information to each other by using the short-range radio technology, as well as change the operating logic of the mobile phone.

Explanation of the signaling:

- The method does not take a stand on the operation of the mobile phone as far as the radio network is concerned, and thus it does not interfere in that part of the signaling in which a base station of the radio network and the mobile phone send and receive radio network signals that have been agreed on internationally.

- Neither does the method take a stand on the Bluetooth signaling, which uses signals that have been agreed on internationally, and Bluetooth versions 1.0 or newer as well as other short-range radio signaling methods can be used.

- The "alert signaling" is equipment manufacturer-specific, short and fast signaling enabling the other party to react very fast.

Explanation of the interfaces: - The interface between the mobile phone and Bluetooth or RFID or the like is based on the methods of the equipment manufacturers, and this invention does not take a stand on it.

- The "alert device interface" of the mobile phone is equipment manufacturer-specific, and this invention does not take a stand on it.