Transmission method in a wireless telecommunication system including at least a base station intended to communicate with terminals

• US 7,885,673 B2
• Filed: 10/26/2007
• Issued: 02/08/2011
• Est. Priority Date: 10/30/2006
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Brunel, Loic, Mottier, David
• Primary Examiner(s): Dao; Minh D
• Application Number:
  US11/925,385
• Publication Number:
  US 20080102753A1
• Time in Patent Office: 1,201 Days
• Field of Search: 455/506.504, 455/18, 455/450, 455/455, 455/464, 370/509, 370/508, 370/510, 370/512, 370/517, 370/519, 370/336, 370/337, 370/345, 370/441, 370/442
• US Class Current: 455/506
• CPC Class Codes: H04L 27/2607 Cyclic extensions

Abstract

The present invention concerns a transmission method in a wireless telecommunication system including at least a base station intended to communicate with terminals over bidirectional communication channels, each channel supporting frames being divided into downlink sub frames and uplink sub frames, each downlink sub frame including a number of symbols intended to be transmitted to at least two terminals, wherein the transfer of at least one supplementary symbol between the base station and at least one terminal that can receive or transmit said at least one supplementary symbol is enabled. The base station forms a first group of terminals and at least another group of at least one terminal, the first group of terminals comprising at least terminals which can not receive and/or transmit said at least supplementary symbol, the other group of at least one terminal comprising at least a terminal which can receive and/or transmit said at least supplementary symbol during the time delay, allocates multiplexing resources of the wireless telecommunication network to at least a part of the terminals comprised in the first group, allocates all the multiplexing resources allocated to the terminals comprised in the first group to one terminal comprised in the other group for at least one supplementary symbol.

Claims

1. A transmission method in a wireless telecommunication system including at least a base station intended to communicate with terminals over bidirectional communication channels, each channel supporting frames being divided into downlink sub frames and uplink sub frames, each downlink sub frame including a number of symbols intended to be transmitted to at least two terminals, the method comprising:

determining, at the base station, the time delay of each terminal connected thereto, said time delay being such that any terminal after having received all the symbols included in a downlink sub frame followed by an uplink sub frame may transmit other symbols over said uplink sub frame with said time delay so that the other symbols susceptible to be transmitted should be received by said base station at a time separated from the end of the transmission by the base station of the downlink sub frame by a predefined guard period constant whatever said distance;

enabling, at the base station, the transfer of at least one supplementary symbol between the base station and at least one terminal that can receive or transmit said at least one supplementary symbol during the time delay;

forming a first group of terminals and at least another group of at least one terminal, the first group of terminals comprising at least terminals which can not receive and/or transmit said at least supplementary symbol during the time delay, the other group of at least one terminal comprising at least a terminal which can receive and/or transmit said at least supplementary symbol during the time delay;

allocating multiplexing resources of the wireless telecommunication network to at least a part of the terminals comprised in the first group for a sub frame;

allocating all the multiplexing resources allocated to the terminals comprised in the first group to one terminal comprised in the other group for at least one supplementary symbol; and

transferring at least one control information which convey information indicating the allocated multiplexing resources to the terminals.

2. The method according to claim 1, wherein the multiplexing resources of the wireless telecommunication network are chunks of frequencies and/or codes and/or areas of a coverage area of the base station.

3. The method according to claim 2, wherein the symbols included in the downlink sub frame that all terminals can receive are comprised in a nominal part of the downlink sub frame, and in that a first control information which convey information indicating the allocated multiplexing resources is transferred to each terminal, the control information being multiplexed with data in order to form at least one symbol comprised in the nominal part of the downlink sub frame.

4. The method according to any of claims 1 to 3, further comprising:

determining, the number of supplementary symbols that can be received or transmitted by each terminal.

5. The method according to claim 4, wherein the first group comprises all the terminals and the at least one other group is a second group which comprises the terminals which can receive or transmit the maximum number of supplementary symbols.

6. The method according to claim 5, wherein the multiplexing resources allocated to one terminal comprised in the other group are allocated for all the supplementary symbols.

7. The method according to claim 6, wherein a second control information is transferred, the second control information is multiplexed with data in order to form at least one symbol comprised in the nominal part of the downlink sub frame or is multiplexed with data in order to form at least one supplementary symbol.

8. The method according to claim 7, wherein the second control information comprises, for each terminal, a single field which indicates if all the multiplexing resources allocated to the terminals comprised in the first group are allocated to the terminal for all the supplementary symbols.

9. The method according to claim 7, wherein the second control information comprises, for each terminal, a single field which indicates at least the number of supplementary symbols, the terminal can transmit and/or receive.

10. The method according to claim 4, wherein the first group comprises all the terminals and plural other groups are formed, at least a second group which comprises the terminals which can receive and/or transmit a first number of supplementary symbols and at least a third group which comprises the terminals which can receive and/or transmit a second number of supplementary symbols.

11. The method according to claim 10, wherein the multiplexing resources allocated to one terminal comprised in the second group are allocated for the first number of supplementary symbols and the multiplexing resources allocated to another terminal comprised in the third group are allocated for the second number of supplementary symbols.

12. The method according to claim 11, wherein a second control information is transferred, the second control information is multiplexed with data in order to form at least one symbol comprised in the nominal part of the downlink sub frame or is multiplexed with data in order to form at least one supplementary symbol or a part of the control information is multiplexed with data in order to form at least one supplementary symbol and another part of the control information is multiplexed with data in order to form at least one other supplementary symbol.

13. The method according to claim 12, wherein the second control information comprises, for each terminal, plural fields, at least a first field which indicates if the terminal can use, for the first number of supplementary symbols, all the multiplexing resources which are allocated to the terminals comprised in the first group to which multiplexing resources are allocated for the sub frame and a second field which indicates if the terminal can use, for the second number of supplementary symbols, all the multiplexing resources which are allocated to the terminals comprised in the first group.

14. The method according to claim 4, wherein the first group comprises a part of the terminals which can receive at most a first number of supplementary symbols during the time delay and plural other groups are formed, at least a second group which comprises the terminals which can receive and/or transmit the first number of supplementary symbols and a third group which comprises the terminals which can receive and/or transmit a second number of supplementary symbols.

15. A transmission method in a wireless telecommunication system including at least a base station intended to communicate with terminals over bidirectional communication channels, each channel supporting frames being divided into downlink sub frames and uplink sub frames, each downlink sub frame including a number of symbols intended to be transmitted to plural terminals, the terminal being able to transfer and/or receive at least one supplementary symbol during a time delay, the time delay being such that any terminal after receiving all the symbols included in a downlink sub frame followed by an uplink sub frame may transmit other symbols over said uplink sub frame with said time delay so that the other symbols susceptible to be transmitted should be received by the base station at a time separated from the end of the transmission by the base station of the downlink sub frame by a predefined guard period constant whatever said distance, the method comprising:

receiving, at the terminal and from the base station, symbols comprising at least a first and a second control information which convey information indicating the multiplexing resources allocated to the terminal;

reading, at the terminal, at least one field of the first control information comprising information indicating the multiplexing resources which may be allocated to the terminal for a sub frame, multiplexing and/or de-multiplexing symbols included into a sub frame according to the allocated multiplexing resources for the multiplex and/or the de multiplex of the symbols included into an uplink and/or a downlink sub frame if multiplexing resources are allocated to the terminal;

reading, at the terminal, at least one field of the second control information comprising information indicating if all the multiplexing resources allocated to other terminals for a sub frame are allocated to the terminal for at least one supplementary symbol; and

multiplexing and/or de-multiplexing, at the terminal, the at least one supplementary symbol if all the multiplexing resources are allocated to the terminal for the at least one supplementary symbol.

16. The method according to claim 15, wherein the symbols included in the downlink sub frame that all terminals can receive are comprised in a nominal part of the downlink sub frame, and in that the second control information is multiplexed with data in order to form at least one symbol comprised in the nominal part of the downlink sub frame or is multiplexed with data in order to form at least one supplementary symbol.

17. The method according to claim 16, wherein the second control information comprises a single field which indicates if all the multiplexing resources are allocated to the terminal for the at least one supplementary symbol.

18. The method according to claim 16, wherein the second control information comprises a single field which indicates at least the number of supplementary symbols the terminal can transmit and/or receive.

19. The method according to claim 15, wherein the symbols included in the downlink sub frame that all terminals can receive are comprised in a nominal part of the downlink sub frame, and in that the second control information is multiplexed with data in order to form at least one symbol comprised in the nominal part of the downlink sub frame or is multiplexed with data in order to form at least one supplementary symbol or a part of the control information is multiplexed with data in order to form at least one supplementary symbol and another part of the control information is multiplexed with data in order to form at least one other supplementary symbol.

20. A base station of a wireless telecommunication system, said base station being intended to communicate with terminals over communication channels, each channel carrying frames being divided into downlink sub frames and uplink sub frames, each downlink sub frame including a number of symbols intended to be transmitted to at least two terminals, said base station comprising:

means for determining the time delay of each terminal connected thereto, said time delay being such that any terminal after having received all the symbols included in a downlink sub frame followed by an uplink sub frame may transmit other symbols over said uplink sub frame with said time delay so that the other symbols susceptible to be transmitted should be received by said base station at a time separated from the end of the transmission by the base station of the downlink sub frame by a predefined guard period constant whatever said distance;

means for enabling the transfer of at least one supplementary symbol between the base station and at least one terminal that can receive or transmit said at least one supplementary symbol during the time delay;

means for forming a first group of terminals and at least another group of at least one terminal, the first group of terminals comprising at least terminals which can not receive and/or transmit said at least supplementary symbol for the time delay, the other group of at least one terminal comprising at least a terminal which can receive and/or transmit said at least supplementary symbol for the time delay;

means for allocating multiplexing resources of the wireless telecommunication network to at least a part of the terminals comprised in the first group;

means for allocating all the multiplexing resources allocated to the terminals comprised in the first group to one terminal comprised in the other group for at least one supplementary symbol; and

means for transferring at least one control information which convey information indicating the allocated multiplexing resources to the terminals.

21. A terminal of a wireless telecommunication system being intended to communicate with a base station over communication channels, each channel carrying frames being divided into downlink sub frames and uplink sub frames, each downlink sub frame including a number of symbols intended to be transmitted to plural terminals, the terminal being able to transfer and/or receive at least one supplementary symbol during a time delay, the time delay being such that any terminal after receiving all the symbols included in a downlink sub frame followed by an uplink sub frame may transmit other symbols over said uplink sub frame with said time delay so that the other symbols susceptible to be transmitted should be received by the base station at a time separated from the end of the transmission by the base station of the downlink sub frame by a predefined guard period constant whatever said distance, said terminal comprising:

means for receiving, from the base station, symbols comprising at least a first and a second control information which convey information indicating the multiplexing resources allocated to the terminal;

means for reading at least one field of the first control information comprising information indicating the multiplexing resources which may be allocated to the terminal for a sub frame;

means for multiplexing and/or de-multiplexing symbols included into an uplink and/or a downlink sub frame according to the allocated multiplexing resources for the multiplex and/or the de multiplex of the symbols included into an uplink and/or a downlink sub frame if multiplexing resources are allocated to the terminal;

means for reading at least one field of the second control information comprising information indicating if all the multiplexing resources allocated to other terminals for a sub frame are allocated to the terminal for at least one supplementary symbol; and

means for multiplexing and/or de-multiplexing the at least one supplementary symbol if all the multiplexing resources are allocated to the terminal for the at least one supplementary symbol.

22. A non-transitory computer readable storage medium encoded with computer executable instructions, which when executed by a base station, cause the base station to perform a method in a wireless telecommunication system including at least the base station which is intended to communicate with terminals over bidirectional communication channels, each channel supporting frames being divided into downlink sub frames and uplink sub frames, each downlink sub frame including a number of symbols intended to be transmitted to at least two terminals, the method comprising:

determining the time delay of each terminal connected thereto, said time delay being such that any terminal after having received all the symbols included in a downlink sub frame followed by an uplink sub frame may transmit other symbols over said uplink sub frame with said time delay so that the other symbols susceptible to be transmitted should be received by said base station at a time separated from the end of the transmission by the base station of the downlink sub frame by a predefined guard period constant whatever said distance;

enabling the transfer of at least one supplementary symbol between the base station and at least one terminal that can receive or transmit said at least one supplementary symbol during the time delay;

forming a first group of terminals and at least another group of at least one terminal, the first group of terminals comprising at least terminals which can not receive and/or transmit said at least supplementary symbol during the time delay, the other group of at least one terminal comprising at least a terminal which can receive and/or transmit said at least supplementary symbol during the time delay;

allocating multiplexing resources of the wireless telecommunication network to at least a part of the terminals comprised in the first group for a sub frame;

allocating all the multiplexing resources allocated to the terminals comprised in the first group to one terminal comprised in the other group for at least one supplementary symbol; and

transferring at least one control information which convey information indicating the allocated multiplexing resources to the terminals.

23. A non-transitory computer readable storage medium encoded with computer executable instructions, which when executed by a terminal, cause the terminal to perform a method in a wireless telecommunication system including at least a base station intended to communicate with terminals over bidirectional communication channels, each channel supporting frames being divided into downlink sub frames and uplink sub frames, each downlink sub frame including a number of symbols intended to be transmitted to plural terminals, the terminal being able to transfer and/or receive at least one supplementary symbol during a time delay, the time delay being such that any terminal after receiving all the symbols included in a downlink sub frame followed by an uplink sub frame may transmit other symbols over said uplink sub frame with said time delay so that the other symbols susceptible to be transmitted should be received by the base station at a time separated from the end of the transmission by the base station of the downlink sub frame by a predefined guard period constant whatever said distance, the method comprising:

receiving, from the base station, symbols comprising at least a first and a second control information which convey information indicating the multiplexing resources allocated to the terminal;

reading at least one field of the first control information comprising information indicating the multiplexing resources which may be allocated to the terminal for a sub frame, multiplexing and/or de-multiplexing symbols included into a sub frame according to the allocated multiplexing resources for the multiplex and/or the de multiplex of the symbols included into an uplink and/or a downlink sub frame if multiplexing resources are allocated to the terminal;

reading at least one field of the second control information comprising information indicating if all the multiplexing resources allocated to other terminals for a sub frame are allocated to the terminal for at least one supplementary symbol; and

multiplexing and/or de-multiplexing, at the terminal, the at least one supplementary symbol if all the multiplexing resources are allocated to the terminal for the at least one supplementary symbol.