Data control for telephone system

• US 4,587,652 A
• Filed: 06/21/1984
• Issued: 05/06/1986
• Est. Priority Date: 06/21/1984
• Status: Expired due to Fees

• Current Assignee: Alcatel NV (Nokia Corporation)
• Original Assignee: ITT Corporation (ITT, Inc.)
• Inventors: Goldman, Stuart O.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Rokoff, Kenneth I.
• Application Number:
  US06/622,939
• Time in Patent Office: 684 Days
• Field of Search: 455/33, 455/38, 455/58, 179/2 EB, 370/110.1, 340/825.5, 371/41
• US Class Current: 370/349
• CPC Class Codes: H04J 3/1682 Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
• CPC Class Codes: H04L 1/0001 Systems modifying transmission characteristics according to link quality, e.g. power backoff adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1874 Buffer management

Abstract

In a telephone system, particularly a mobile radio-telephone system, incorporating statistical multiplexers and control concentrators for the arranging and formatting of digitized data, the data is formatted with operational codes designating specific meaning and any one of a plurality of levels of protection to be offered data transmitted via the telephone system. A back-up memory is connected to the statistical multiplexer to enable a retransmission of a batch of data in the event that the batch had been received with error. Full duplex communication is provided. A circular sequence number interleaved among batches of the data is utilized by an error detector at a receiving site to determine the presence of all portions of a batch of data. Transmission of specified operational codes and additional data as required in the reverse direction commands a retransmission and also provides for acknowledgement of receipt of a data batch with and without error.

Claims

1. In a telephone system, a method of communicating digitized data comprising the steps of:

storing batches of said data from each of a plurality of subscriber stations or cell site base equipment and system control elements prior to transmission of individual batches of said data from a first site to a second site;

in each of said batches, counting segments of said data;

in each of said batches, combining an operational code with said data to provide formatted data, said code including sequencing legends interleaved between successive ones of said segments of data;

storing formatted data of each of said batches in a back-up memory;

multiplexing the formatted data;

transmitting the formatted data from said first site to said second site; and

checking data received at said second site in accordance with one of a plurality of procedures designated by said operational code.

2. A method according to claim 1 further comprising the step of reformatting the formatted data to regenerate said digitized data.

3. A method according to claim 1 further comprising the step of selecting an operational code designating a checking procedure that is free of a further communication between said first site and said second site.

4. A method according to claim 1 further comprising the step of selecting an operational code designating a checking procedure comprising the steps of:

signalling said first site of an error in the formatted data received at said second site; and

retransmitting formatted data from said back-up memory.

5. A method according to claim 1 further comprising the step of selecting an operational code designating a checking procedure comprising the steps of:

signalling said first site of an error in the formatted data received at said second site;

retransmitting formatted data from said back-up memory; and

signalling said first site of a correct transmission.

6. A method according to claim 1 further comprising the step of selecting an operational code designating a checking procedure comprising the step of signalling said first site of a correct transmission.

7. A method according to claim 1 further comprising the step of converting analog voice signals received from a mobile subscriber station at said first site to said digitized data.

8. A method according to claim 7 further comprising the step of selecting an operational code at said mobile station.

9. A method according to claim 4 further comprising the steps of:

converting analog voice signals received from a mobile subscriber station at said first site to said digitized data; and

selecting an operational code at said mobile station.

10. A method according to claim 5 further comprising the steps of:

converting analog voice signals received from a mobile subscriber station at said first site to said digitized data.

11. A method according to claim 1 further incorporating the step of selecting the operational code.

12. A method according to claim 11 wherein said code selecting step comprises:

establishing a digital byte having an even number of digits;

dividing said byte into a first half and a second half; and

forming one of said halves as a hexadecimal word, and the other of said halves is restricted to the letters A-F.