Method and packet radio system for transmitting modulation and signalling information

• US 6,185,227 B1
• Filed: 03/16/2000
• Issued: 02/06/2001
• Est. Priority Date: 07/22/1999
• Status: Expired due to Term

• Current Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Original Assignee: Nokia Networks (Nokia Corporation)
• Inventors: Sipola, Jussi
• Primary Examiner(s): CANGIALOSI, SALVATORE A
• Application Number:
  US09/527,408
• Time in Patent Office: 327 Days
• Field of Search: 370/522, 370/527, 370/529, 370/337, 370/329, 375/231, 375/233, 375/340, 455/276.1, 455/557
• US Class Current: 370/522
• CPC Class Codes: H04J 3/12 Arrangements providing for calling or supervisory signals
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication

Abstract

The invention relates to a coding method of signalling information in a packet radio system and to a packet radio system, which comprises at least one base station and subscriber terminal, in which signals to be transmitted on a radio connection between the base station and the subscriber terminal form blocks, which comprise bursts consisting of symbols, the burst comprising a training sequence in which modulation information is included. The invention is characterized in that signalling information is coded together with the modulation information relating to the whole block into the training sequences of the block. Coding enables e.g. a higher data transmission rate because it is not necessary to reserve data bits for coding of uplink state flags, for example.

Claims

1. A coding method of signalling information in a packet radio system, which comprises at least one base station (112) and subscriber terminal (150),

in which signals to be transmitted on a radio connection (170) between the base station (112) and the subscriber terminal (150) form blocks, which comprise bursts consisting of symbols,

the burst comprising a training sequence (302) in which modulation information is included,

characterized in that signalling information is coded together with the modulation information relating to the whole block into the training sequences (302) of the block.

2. A method according to claim 1, characterized in that the modulation information relating to the whole block is included only in some of the training sequences (302) included in the bursts of the block of the packet radio system, and that signalling information is coded into the other training sequences (302) of the block.

3. A method according to claim 1, characterized in that uplink state flags are coded in the training sequences (302) of the packet radio system.

4. A method according to claim 2, characterized in that modulation information is included only in the first burst of the block.

5. A method according to claim 1, characterized in that the bursts are demodulated immediately after they have been received.

6. A method according to claim 1, characterized in that the bursts following the first burst are demodulated using the same modulation method as in the demodulation of the first burst.

7. A method according to claim 1, characterized in that the training sequences (302) of the bursts following the first burst are used for transmitting block-coded uplink state flags.

8. A method according to claim 1, characterized in that the training sequences (302) of the bursts following the first bursts are used for signalling other than burst modulation.

9. A packet radio system, which comprises at least one base station (112) and subscriber terminal (150),

in which the signals to be transmitted on a radio connection (170) between the base station (112) and the subscriber terminal (150) form blocks, which comprise bursts consisting of symbols,

the bursts comprising a training sequence (302) in which modulation information is included,

characterized in that the packet radio system is arranged to code signalling information together with the modulation information relating to the whole block into the training sequences (302) of the block.

10. A packet radio system according to claim 9, characterized in that the packet radio system is arranged to include the modulation information relating to the whole block only in some of the training sequences (302) the bursts of the block include, and that the packet radio system is arranged to code signalling information into the other training sequences (302) of the block.

11. A packet radio system according to claim 9, characterized in that the packet radio system is arranged to code uplink state flags in the training sequences (302) of the packet radio system.

12. A packet radio system according to claim 10, characterized in that the packet radio system is arranged to include modulation information only in the first burst of the block.

13. A packet radio system according to claim 9, characterized in that the system is arranged to demodulate the bursts immediately after they have been received.

14. A packet radio system according to claim 9, characterized in that the system is arranged to demodulate the bursts following the first burst using the same modulation method as in the demodulation of the first burst.

15. A packet radio system according to claim 9, characterized in that the training sequences (302) of the bursts following the first burst are arranged to transmit block-coded uplink state flags.

16. A packet radio system according to claim 9, characterized in that the packet radio system is arranged to use the training sequences (302) of the bursts following the first burst for signalling other than burst modulation.