Operating method for a mobile telephone

• US 20010024961A1
• Filed: 02/28/2001
• Published: 09/27/2001
• Est. Priority Date: 02/29/2000
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Richter, Thomas
• Granted Patent: US 7,190,953 B2
• Time in Patent Office: Days
• US Class Current: 455/553.1
• CPC Class Codes: H04W 8/22 Processing or transfer of terminal data, e.g. status or physical capabilities

Abstract

A method of operating a mobile telephone that is taken up in a data transmission network, which method involves at least one encoding and decoding algorithm for converting analog speech data into digital data and vice versa; according to this method at least one further encoding and decoding algorithm is transmitted to the mobile telephone via a data transmission link that is established between the mobile telephone and the network, which algorithm is received by the mobile telephone and stored in a non-volatile memory so as to be used for data conversion after the implementation.

Claims

1. A method of operating a mobile telephone that is taken up in a data transmission network, which method involves at least one encoding and decoding algorithm for converting analog speech data into digital data and vice versa, characterized in that at least one further encoding and decoding algorithm is applied to the mobile telephone, via a data transmission link established between the mobile telephone (1) and the network (8), which algorithm is received by the mobile telephone and stored in a non-volatile memory (4, 5) so as to be used for data conversion after the implementation.

2. A method as claimed in

claim 1

,

characterized in that

the encoding and decoding algorithm loaded via the network (8) is used as an alternative for the encoding and decoding algorithms already present, and that each time a given algorithm can be selected.

3. A method as claimed in

claim 1

or

2

,

characterized in that

in order to establish the data transmission link for the transmission of the encoding and decoding algorithm, the network (8) transmits an SMS message to the mobile telephone (1) or makes a direct call to the mobile telephone (1) in order to initiate a call from the mobile telephone (1) to the network (8).

4. A method as claimed in one of the preceding claims,

characterized in that

the data transmission link is in conformity with the GSM standard, notably the protocols DCS 1800 or PCS 1900.

5. A method as claimed in one of the preceding claims,

characterized in that

at the end of the data transmission, or after a part of the data transmission, a test sum is transmitted so as to be compared with a test sum calculated by the mobile telephone (1) from the transmitted data, the data transmission being terminated in the case of identical test sums whereas it is repeated in the case of different test sums.

6. A mobile telephone involving at least one encoding and decoding algorithm for converting analog speech data into digital data and vice versa,

characterized in that

it includes a non-volatile memory (4, 5) and means for receiving at least one further encoding and decoding algorithm via a data transmission link established between the mobile telephone (1) and the network (8) and for storing it in the non-volatile memory (4, 5).

7. A mobile telephone as claimed in

claim 6

,

characterized in that

the non-volatile memory (4, 5) is constructed as an EEPROM or a Flash PROM.

8. A mobile telephone as claimed in

claim 6

or

7

,

characterized in that

it includes means (21, 22) for switching over between the encoding and decoding algorithms, each time one given encoding and decoding algorithm being activated.