Method for communicating handsets

• US 6,289,218 B1
• Filed: 06/11/1998
• Issued: 09/11/2001
• Est. Priority Date: 06/11/1998
• Status: Expired due to Fees

• Current Assignee: Winbond Electronics Corporation
• Original Assignee: Winbond Electronics Corporation
• Inventors: Liu, Chao Yin
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): CRAVER, CHARLES R
• Application Number:
  US09/096,210
• Time in Patent Office: 1,188 Days
• Field of Search: 455/02, 455/17, 454/26, 455/24, 45/111, 455/09, 45/17, 45/331, 455/18, 455/15, 455/19, 455/26, 370/331, 370/503, 370/504, 370/510, 370/337, 370/280, 370/314
• US Class Current: 455/426.1
• CPC Class Codes: H04B 7/2643 using time-division multiple access [TDMA] H04B7/2615, H04B7/2618 take precedence
• CPC Class Codes: H04M 1/72513 On hold, intercom or transfer communication modes
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method for directly communicating handsets is provided. The method includes the following steps of providing a calling handset and a called handset, inputting a first number to the calling handset for obtaining a first identification (ID) code therefor, inputting a second number to the called handset for obtaining a second ID code therefor, transmitting the first ID code from the calling handset to the called handset when the calling handset is to call the called handset, receiving the first ID code by the called handset, identifying whether the first ID code matches with the second ID code, and synchronizing the two handsets for a direct communication.

Claims

1. A method for directly communicating handsets, comprising the following steps of:

providing a calling handset and a called handset;

inputting a first number to said calling handset for obtaining a first identification (ID) code therefor;

inputting a second number to said called handset for obtaining a second ID code therefor, wherein each of said first and second ID codes comprises a direct communication ID code and a channel number;

transmitting said first ID code from said calling handset to said called handset when said calling handset is to call said called handset;

identifying whether said first ID code matches with said second ID code; and

synchronizing said two handsets for a direct communication if said first ID code matches with said second ID code,

wherein when a handshake fails between said two handsets, a starting communication signal is sent from said called handset to said calling handset and a phonetic signal of said called handset is connected.

2. A method for directly communicating handsets according to claim 1 wherein said handsets are used in a European DECT system.

3. A method for directly communicating handsets according to claim 1 wherein said first and second numbers are respectively encoded by said calling and called handsets into said first and second ID codes respectively.

4. A method for directly communicating handsets according to claim 1 wherein said identifying step is to identify whether said first and second ID codes are identical in part at least.

5. A method for directly communicating handsets according to claim 1 wherein when said calling handset calls said called handset, said calling handset enters into a direct communication idle mode in which said calling handset will proceed a direct communication calling mode for calling said called handset when a direct communication initialization of said calling handset is true.

6. A method for directly communicating handsets according to claim 5 wherein in said direct communication calling mode, there are the following steps:

locating an unused one of time slots of a respective channel, defining said one time slot as a predetermined time slot of said calling handset, and transmitting said direct communication ID code of said calling handset to said called handset in said predetermined time slot; and

entering into a direct communication connection mode upon receiving an answering signal from said called handset.

7. A method for directly communicating handsets according to claim 6 wherein a code representing said predetermined time slot is generated when said first number is encoded into said first ID code in order to synchronize handsets.

8. A method for directly communicating handsets according to claim 6 wherein said direct communication connection mode includes the following steps of:

returning to said direct communication idle mode when a handshake acknowledge signal from said called handset fails; and

connecting a phonetic signal of said calling handset for proceeding a directly communicating procedure upon receiving a start communication signal from said called handset.

9. A method for directly communicating handsets according to claim 8 wherein said directly communicating procedure includes the following steps of:

transmitting a handshake acknowledge signal for connecting said handsets in an A-field of said predetermined time slot; and

transmitting said phonetic signal to said called handset in a B-field of said predetermined time slot when a user of said calling handset is talking.

10. A method for directly communicating handsets according to claim 1 wherein said direct communication receiving mode includes the following steps of:

defining said specific time slot as a predetermined time slot of said called handset;

transmitting an answering signal to said calling handset; and

entering into a direct communication connection mode.

11. A method for directly communicating handsets according to claim 10 wherein a code representing said predetermined time slot is generated when said second number is encoded into said second ID code in order to synchronize said handsets.

12. A method for directly communicating handsets according to claim 10 wherein said direct communication connection mode includes the following steps of:

returning to said direct communication idle mode when said handshake between said two handsets fails;

transmitting said starting communication signal from said called handset to said calling handset once a user of said called handset decides to connect; and

connecting said phonetic signal of said called handset for entering into a direct communicating mode.

13. A method for directly communicating handsets according to claim 12 wherein said directly communicating mode includes the following steps of:

transmitting a handshake signal for maintaining a connection between said handsets in an A-field of said predetermined time slot; and

transmitting said phonetic signal to said calling handset in a B-field of said predetermined time slot when said user is talking.

14. A method for directly communicating handsets according to claim 1 wherein each of said first and second ID numbers includes an additional encryption code.

15. A method for directly communicating handsets according to claim 1, wherein when said called handset receives said first ID code, said called handset enters into a direct communication idle mode which includes the following steps of:

entering into an idle state;

scanning time slots of a channel corresponding said channel number;

finding a specific time slot in which a calling signal from said calling handset is received; and

entering into a direct communication receiving mode when said direct communication ID codes of said first and said second ID codes match with each other during said specific time slot.

16. A method for directly communicating handsets comprising the steps of:

providing a first handset and a second handset;

causing said first handset to enter into a direct communication idle mode;

causing said first handset to enter into a direct communication calling mode once said first handset is desired to require a direct communication;

receiving a calling signal from said second handset;

causing said first handset to enter into a direct communication receiving mode upon identifying said calling signal contains a partial signal matching with a corresponding one of said first handset for synchronizing said first and second handsets;

causing said first handset to enter into a direct communication connection mode; and

causing said first handset to enter into a directly communicating mode upon transmitting a data,

wherein said directly communicating mode proceeds the step of returning to said direct communication idle mode upon receiving a stop communication signal from said second handset;

returning to said direct communication idle mode if a handshake between said handsets fails; and

transmitting a stop communication signal to enter into said direct communication mode when said first handset has an interrupted communication.

17. A method for directly communicating handsets according to claim 16 wherein said partial signal is a direct communication ID code.

18. A method for directly communicating handsets according to claim 17 wherein in said calling mode, the following steps are proceeded:

locating an unused time slot;

setting said unused time slot as a direct communication time slot;

transmitting a calling signal in said direct communication time slot; and

transmitting a confirming signal upon receiving an answering signal from said second handset.

19. A method for directly communicating handsets according to claim 18, further comprising a step of encrypting a data before said first handset having received a handshake acknowledge signal enters into said direct communication connection mode.

20. A method for directly communicating handsets according to claim 18 wherein said direct communication connection mode proceeds the following steps of:

transmitting a start communication signal upon generating said data and confirming an existence of a handshake acknowledge signal; and

entering into said directly communicating mode upon receiving a start communication signal from said second handset.

21. A method for directly communicating handsets according to claim 18 wherein said calling signal includes:

an encrypted code for encrypting a data; and

a channel number for identifying a communication channel.

22. A method for directly communicating handsets according to claim 16 wherein said direct communication receiving mode proceeds the following steps of:

identifying a communication time slot in which said calling signal is identified to contain said partial signal matching with said corresponding one of said first handset;

transmitting an answering signal; and

transmitting a handshake acknowledge signal upon receiving an answering confirmation signal from said second handset.

23. A method for directly communicating handsets according to claim 22 further comprising a step of encrypting a data before entering into said direct communication connection mode.

24. A method for directly communicating handsets according to claim 16 wherein said handsets are European digital wireless DECT (Digital Enhanced Cordless Telecommunications) telephones.