Wireless Communication System, Wireless Communication Method, and Wireless Communication Apparatus

• US 20070286146A1
• Filed: 04/28/2005
• Published: 12/13/2007
• Est. Priority Date: 05/06/2004
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Hamabe, Kojiro, Kuroda, Nahoko, Lee, Jinsook
• Granted Patent: US 8,588,200 B2
• Time in Patent Office: Days
• US Class Current: 370/342
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0005 applied to payload information
• CPC Class Codes: H04L 1/0011 applied to payload information
• CPC Class Codes: H04L 1/0016 involving special memory structures, e.g. look-up tables
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0079 Formats for control data H04L1/16 takes precedence; training sequences H04L25/00 and H04L27/00
• CPC Class Codes: H04L 1/008 where the control data relates to payload of a different packet
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• 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 1/1858 Transmission or retransmission of more than one copy of acknowledgement message
• CPC Class Codes: H04L 2001/125 Arrangements for preventing errors in the return channel
• CPC Class Codes: H04W 92/10 between terminal device and access point, i.e. wireless air interface

Abstract

A wireless communication system of the present invention achieves improvement of reliability of communication of control data while suppressing the decrease in the communication throughput of data blocks and/or control data. The wireless communication system of the present invention is provided with a base station (1) and a mobile station (2). The mobile station (2) is configured to transmit a plurality of data blocks to the base station (1) at predetermined transmission time intervals. One of the base and mobile stations is configured to generate a plurality of control data used for control of transmission of said plurality of data blocks, to generate a plurality of control messages from said plurality of control data, and to transmit said plurality of control messages to the other of the base and mobile stations. Each of the control data is used for generation of M control messages out of the plurality of control messages, and each of the control messages is generated from M control data out of the plurality of control data.

Claims

1. A wireless communication system comprising:

a first communication apparatus; and

a second communication apparatus

wherein said first communication apparatus is configured to transmit a plurality of data blocks to the second communication apparatus at predetermined transmission time intervals,

wherein one of said first and second communication apparatuses is configured to generate a plurality of control data used for control of transmission of said plurality of data blocks, to generate a plurality of control messages from said plurality of control data, and to transmit said plurality of control messages to the other of said first and second communication apparatuses at the same time intervals as said transmission time intervals,

wherein each of said control data is used for generation of M control messages out of said plurality of control messages, and

wherein each of said control messages is generated from M control data out of said plurality of control data.

2. The wireless communication system according to claim 1, wherein said plurality of control messages generated from said plurality of control data are transmitted from said second communication apparatus to said first communication apparatus, and

wherein said plurality of said control data respectively include error detection data indicative of whether said respective plurality of data blocks are successfully received by said second communication apparatus.

3. The wireless communication system according to claim 2, wherein said first communication apparatus reproduces said error detection data from said plurality of control messages, and retransmits to said second communication apparatus data blocks which are not successfully received by said second communication apparatus, in response to said reproduced error detection data.

4. The wireless communication system according to claim 1, wherein said plurality of control messages generated from said plurality of control data are transmitted from said second communication apparatus to said first communication apparatus,

wherein said plurality of said control data respectively include transmission rate instruction data by which said second communication apparatus instructs to said first communication apparatus a maximum transmission rate allowed for transmission of said data blocks.

5. The wireless communication system according to claim 4, wherein said first communication apparatus reproduces said transmission rate instruction data from said plurality of control messages, and controls transmission rate of said plurality of data blocks in response to said reproduced transmission rate instruction data.

6. The wireless communication system according to claim 1, wherein said control messages generated from said plurality of control data are transmitted from said first communication apparatus to said second communication apparatus,

wherein said control data respectively includes transmission rate request data by which said first communication apparatus requests said second communication apparatus to update a maximum transmission rate allowed for transmission of said data blocks.

7. The wireless communication system according to claim 6, wherein said second communication apparatus reproduces said transmission rate request data from said plurality of control messages, and controls a maximum transmission rate allowed for transmission of said data blocks in response to said reproduced transmission rate request data.

8. The wireless communication system according to claim 1, wherein said plurality of control messages generated from said plurality of control data are transmitted from said first communication apparatus to said second communication apparatus, and

wherein said plurality of control data respectively includes data amount data indicative of data amount of a transmission buffer in which said first communication apparatus stores said data blocks before transmission of said data blocks.

9. The wireless communication system according to claim 8, wherein said second communication apparatus reproduces said data amount data from said plurality of control messages, and controls a maximum transmission rate allowed for transmission of said data blocks in response to said reproduced data amount data.

10. The wireless communication system according to claim 1, wherein each of said plurality of control messages includes M fields,

wherein said one control data is contained in a first field of a first control message out of said M control messages associated with said one control data, a second field of a second control message out of said M control messages, . . . , and an M-th field of an M-th control message out of said M control messages, and

wherein said other communication apparatus reproduces said one control data through soft decision on said first field of said first control message, said second field of said second control message, . . . , and said M-th field of said M-th control message.

11. The wireless communication system according to claim 1, wherein each of said M control messages associated with said one control data includes one selected bit sequence which is selected from a plurality of predetermined bit sequences in response to said M control data used for generation of said M respective control messages, and

wherein said other communication apparatus is configured to determine the most likely bit sequences of said respective plurality of control messages through performing soft decision on said respective plurality of control messages, to determine M candidates of said one control data from said respective most likely bit sequences of said plurality of control messages, and to finally determine said one of control data from said M candidates based on reliabilities of said M control messages associated with said one control data, said reliabilities being calculated in said soft decision.

12. (a) transmitting a plurality of data blocks from a first communication apparatus to a second communication apparatus at predetermined transmission time intervals;

(b) generating a plurality of control data used for control of communication of said plurality of data blocks;

(c) generating a plurality of control messages from said plurality of control data; and

(d) transmitting said plurality of control messages at same time intervals as said transmission time intervals,

wherein each of said plurality of control data is used for generation of N control messages out of said plurality of control messages, and

wherein each of said plurality of control messages is generated from M control data out of said plurality of control data.

13. A wireless communication system comprising:

a first communication apparatus; and

a second communication apparatus wirelessly communicating said first communication apparatus,

wherein said first communication apparatus is configured to transmit a plurality of data blocks to the second communication apparatus at predetermined transmission time intervals,

wherein one of said first and second communication apparatuses is configured to generate a plurality of control data used for control of transmission of said plurality of data blocks, to generate a plurality of control messages from said plurality of control data, and to transmit said plurality of control messages to the other of said first and second communication apparatuses at the same time intervals as said transmission time intervals,

wherein each of said control data is used for generation of M control messages out of said plurality of control messages, and

wherein each of said control messages is generated from M control data out of said plurality of control data.

14. A wireless communication apparatus comprising:

a transmission unit transmitting a plurality of data blocks at predetermined transmission time intervals;

a control data generation unit generating a plurality of control data used for control of communication of said plurality of data blocks; and

a control message generation unit generating a plurality of control messages from said plurality of control data,

wherein said transmission unit transmits said plurality of control messages at said transmission time intervals, and

wherein said control message generation unit uses each of said plurality of control data for generation of M control messages out of said plurality of control messages, and generates each of said plurality of control messages from M control data out of said plurality of control data.

15. A communication apparatus comprising:

a transmission unit transmitting a plurality of data blocks at predetermined transmission time intervals;

a reception unit receiving a plurality of control messages transmitted at said predetermined transmission time intervals; and

a control data decision unit reproducing a plurality of control data used for control of communication of said data blocks from said plurality of control messages,

wherein each of said control messages is generated from M control data out of said plurality of control data so that each of said control data is used for generation of M control messages out of said plurality of control data, and

wherein said control data decision unit reproduces each of said plurality of control data from M associated control messages out of said plurality of control messages.

16. A wireless communication apparatus comprising:

a reception unit receiving a plurality of data blocks transmitted at predetermined transmission time intervals;

a control data generation unit generating a plurality of control data used for control of communication of said plurality of data blocks; and

a transmission unit transmitting said plurality of control messages at said predetermined transmission time intervals,

wherein said control message generation unit uses each of said plurality of control data for generation of M control messages out of said plurality of control messages, and generates each of said plurality of control messages from M control data out of said plurality of control data.

17. A wireless communication apparatus comprising;

a reception unit receiving a plurality of data blocks transmitted at predetermined transmission time intervals, and a plurality of control messages transmitted at said predetermined transmission time intervals; and

a control data decision unit reproducing a plurality of control data used for control of communication of said plurality of data blocks, from said plurality of control messages,

wherein each of said control messages is generated from M control data out of said plurality of control data so that each of said control data is used for generation of M control messages out of said plurality of control data, and

wherein said control data decision unit reproduces each of said plurality of control data from M associated control messages out of said plurality of control messages.

18. A WCDMA system comprising:

a base station; and

a mobile station configured to transmit a plurality of data blocks to the base station at predetermined transmission time intervals,

wherein one of said mobile and base stations is configured to generate a plurality of control data used for control of transmission of said data blocks to said base station, to generate a plurality of control messages from said plurality of control data, and to transmit said plurality of control messages to the other of said mobile and base stations at the same time intervals as said transmission time intervals,

wherein each of said control data is used for generation of M control messages out of said plurality of control messages, and

wherein each of said control messages is generated from M control data out of said plurality of control data.

19. The WCDMA system according to claim 18, wherein said plurality of control messages generated from said plurality of control data are transmitted from said base station to said mobile station, and

wherein said plurality of control data respectively includes error detection data indicative of whether or not said respective plurality of data blocks are successfully received by said base station.

20. The WCDMA system according to claim 19, wherein said mobile station reproduces said error detection data from said plurality of control messages, and retransmits data blocks out of said plurality data blocks, which are not successfully received by said base station, in response to said reproduced error detection data.

21. The WCDMA system according to claim 18, wherein said plurality of control messages generated from said plurality of control data are transmitted from said base station to said mobile station, and

wherein said plurality of control data respectively includes TFC update instructions instructing update of allowed TFCs “

allowed transport format combinations”

of said mobile station.

22. The WCDMA system according to claim 21, wherein said mobile station reproduces said allowed TFC instructions from said plurality of control messages, and controls said allowed TFCs in response to said reproduced TFC update instructions.

23. The WCDMA system according to claim 18, wherein said plurality of control messages generated from said plurality of control data are transmitted from said mobile station to said base station, and

wherein said plurality of control data respectively includes TFC update requests by which said mobile station requests said base station to update allowed TFCs of said mobile station.

24. The WCDMA system according to claim 23, herein said base station reproduces said TFC update requests from said plurality of control messages, and controls said allowed TFCs of said mobile station in response to said reproduced TFC update requests.

25. The WCDMA system according to claim 18, wherein said plurality of control messages generated from said plurality of control data are transmitted from said mobile station to said base station, and

wherein said plurality of control data respectively includes data amount data indicative of data amount of a transmission buffer in which said mobile station stores said data blocks before transmission of said data blocks.

26. The WCDMA system according to claim 25, wherein said base station reproduces said data amount data from said plurality of control messages, and controls said allowed TFCs of said mobile station in response to said reproduced data amount data.