APPARATUS AND METHOD FOR ALLOCATING RESOURCES IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS MOBILE COMMUNICATION SYSTEM

• US 20070280166A1
• Filed: 05/15/2007
• Published: 12/06/2007
• Est. Priority Date: 05/15/2006
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jung, Jung-Soo, Kim, Dae-Gyun, Bae, Beom-Sik, Kwon, Hwan-Joon, Kim, Yu-Chul
• Granted Patent: US 7,944,877 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support

Abstract

A method for receiving resources allocated from a base station by a terminal in an OFDMA mobile communication system. The method includes receiving, for a data channel, a number of first components, which indicates an amount of resources used with a first resource allocation scheme, and a number of second components, which indicates an amount of resources used with a second resource allocation scheme, from the base station over a common control channel; determining first and second identifier lengths of channel elements for the first and second resource allocation schemes according to the number of first components and the number of second components; receiving resource allocation information including an identifier indicating at least one channel element allocated to the terminal, over a data control channel using one of the identifier lengths; and transmitting and receiving data over a resource of a channel element indicated by the received identifier.

Claims

1. A method for receiving resources allocated from a base station by a terminal in an Orthogonal Frequency Division Multiple Access (OFDMA) mobile communication system, the method comprising:

receiving, for a data channel, information of a number of first components, which indicates an amount of resources used with a first resource allocation scheme, and a number of second components, which indicates an amount of resources used with a second resource allocation scheme, from the base station over a common control channel;

determining first and second identifier lengths of channel elements for the first and second resource allocation schemes according to the information of the number of first components and the number of second components;

receiving resource allocation information including an identifier indicating at least one channel element allocated to the terminal, over a data control channel using one of the identifier lengths; and

transmitting or receiving data over a resource of a channel element indicated by the received identifier.

2. The method of claim 1, wherein the number of first components is a number of channel elements allocated with a Distributed Resources Channel (DRCH), and the number of second components is a number of channel elements allocated with a Localized Resources Channel (LRCH).

3. The method of claim 1, wherein the number of first components is a number of channel elements allocated with wide-band frequency hopping, and the number of second components is a number of channel elements allocated with sub-band frequency hopping.

4. The method of claim 1, wherein the resource allocation information includes at least one channel element identifier having an identifier length based on one of the first and second resource allocation schemes applied to the terminal, among the identifier lengths.

5. The method of claim 1, wherein the identifier indicating at least one channel element has, based on the determined identifier length, a variable identifier length within the resource allocation information according to a number of allocable channel elements.

6. The method of claim 1, wherein the number of first components and the number of second components are valid for a specific period.

7. A method for allocating resources to at least one terminal by a base station in an Orthogonal Frequency Division Multiple Access (OFDMA) mobile communication system, the method comprising:

determining, for a data channel, a number of first components, which indicates an amount of resources used with a first resource allocation scheme, and a number of second components, which indicates an amount of resources used with a second resource allocation scheme;

transmitting information of the number of first components and the number of second components to the terminal over a common control channel;

determining identifier lengths of channel elements for the first and second resource allocation schemes according to the number of first components and the number of second components;

transmitting resource allocation information including an identifier indicating at least one channel element allocated to the terminal, over a data control channel using one of the identifier lengths; and

transmitting or receiving data over a resource of a channel element corresponding to the identifier.

8. The method of claim 7, wherein the number of first components is a number of channel elements allocated with a Distributed Resources Channel (DRCH), and the number of second components is a number of channel elements allocated with a Localized Resources Channel (LRCH).

9. The method of claim 7, wherein the number of first components is a number of channel elements allocated with wide-band frequency hopping, and the number of second components is a number of channel elements allocated with sub-band frequency hopping.

10. The method of claim 7, wherein the identifier indicating at least one channel element has, based on the determined identifier length, a variable identifier length within the resource allocation information according to a number of allocable channel elements.

11. The method of claim 7, wherein the resource allocation information includes at least one channel element identifier having an identifier length based on one of the first and the second resource allocation schemes applied to the terminal, among the identifier lengths.

12. The method of claim 7, wherein the number of first components and the number of second components are valid for a specific period.

13. A terminal apparatus for receiving resources allocated from a base station in an Orthogonal Frequency Division Multiple Access (OFDMA) mobile communication system, the terminal apparatus comprising:

a reception unit for receiving a signal transmitted by the base station;

a control channel decoder for decoding a common control channel signal among the signals output from the reception unit, and outputting, for a data channel, information of a number of first components, which indicates an amount of resources used with a first resource allocation scheme, and a number of second components, which indicates an amount of resources used with a second resource allocation scheme; and

a controller for determining identifier lengths of channel elements according to the information of the number of first components and the number of second components, and receiving resource allocation information.

14. The terminal apparatus of claim 13, wherein the number of first components is a number of channel elements allocated with a Distributed Resources Channel (DRCH), and the number of second components is a number of channel elements allocated with a Localized Resources Channel (LRCH).

15. The terminal apparatus of claim 13, wherein the number of first components is a number of channel elements allocated with wide-band frequency hopping, and the number of second components is a number of channel elements allocated with sub-band frequency hopping.

16. The terminal apparatus of claim 13, wherein the number of first components and the number of second components are valid for a specific period.

17. A base station apparatus for allocating resources to at least one terminal in an Orthogonal Frequency Division Multiple Access (OFDMA) mobile communication system, the base station apparatus comprising:

a downlink scheduler and controller for generating information on resources to be allocated to the terminal, for determining, for a data channel, a number of first components, which indicates an amount of resources used with a first resource allocation scheme, and it number of second components, which indicates an amount of resources used with a second resource allocation scheme, determining a length of a channel element identifier according to the number of first components and the number of second components constituting the data channel, and for generating an identifier indicating at least one channel element to be allocated to transmit data to the terminal using the identifier length;

a common control channel symbol generator for transmitting information of the number of first components and the number of second components over a common control channel; and

a control channel symbol generator for transmitting resource allocation information including the generated identifier.

18. The base station apparatus of claim 17, wherein the number of first components is a number of channel elements allocated with a Distributed Resources Channel (DRCH), and the number of second components is a number of channel elements allocated with a Localized Resources Channel (LRCH).

19. The base station apparatus of claim 17, wherein the number of first components is a number of channel elements allocated with wide-band frequency hopping, and the number of second components is a number of channel elements allocated with sub-band frequency hopping.

20. The base station apparatus of claim 17, wherein the resource allocation information includes at least one channel element identifier having an identifier length based on one of the first and the second resource allocation schemes applied to the terminal, among the identifier lengths.

21. The base station apparatus of claim 17, wherein the identifier indicating at least one channel element has, based on the determined identifier length, a variable identifier length within the resource allocation information according to a number of allocable channel elements.

22. The base station apparatus of claim 17, wherein the number of first components and the number of second components are valid for a specific period.

23. A method for receiving resources allocated from a base station by a terminal in an Orthogonal Frequency Division Multiple Access (OFDMA) mobile communication system, the method comprising:

receiving first resource allocation information and second resource allocation information, each including at least one channel element identifier indicating at least one channel element allocated for data transmissions over at least one data control channel;

analyzing the first resource allocation information according to a previously known first channel element identifier length, to determine at least one channel element indicated by the first resource allocation information;

determining a second channel element identifier length according to a number of remaining channel elements obtained by excluding a number of channel elements indicated by the first resource allocation information from a number of allocable channel elements; and

analyzing the second resource allocation information according to the second channel element identifier length, to determine a channel element indicated by the second resource allocation information.

24. The method of claim 23, wherein the first resource allocation information and the second resource allocation information are simultaneously transmitted over different data control channels.

25. The method of claim 24, wherein the data control channels are allocated to terminals having an identical Channel Quality Indicator (CQI) level, and their channel element identifiers are determined in order of a data control channel having a low CQI level.

26. The method of claim 23, wherein the first resource allocation information and the second resource allocation information indicate channel elements allocated to different terminals, and are transmitted over one data control channel.

27. A method for allocating resources to at least one terminal by a base station in an Orthogonal Frequency Division Multiple Access (OFDMA) mobile communication system, the method comprising:

determining a first channel element identifier length according to a number of allocable channel elements;

determining first resource allocation information including at least one channel element identifier indicating at least one channel element allocated for data transmission, using the first channel element identifier length;

when there is a need for additionally allocating resources, determining a second channel element identifier length according to a number of remaining channel elements obtained by excluding a number of at least one channel elements allocated through the first resource allocation information from a number of the channel elements;

determining second resource allocation information including at least one channel element identifier indicating at least one channel element allocated for data transmission, using the second channel element identifier length; and

transmitting the first resource allocation information and the second resource allocation information over at least one data control channel.

28. The method of claim 27, wherein the first and second resource allocation information are simultaneously transmitted over different data control channels.

29. The method of claim 28, wherein the data control channels are allocated to terminals having an identical Channel Quality Indicator (CQI) level, and their channel element identifiers are determined in order of a data control channel having a low CQI level.

30. The method of claim 27, wherein the first resource allocation information and the second resource allocation information indicate channel elements allocated to different terminals, and are transmitted over one data control channel.

31. A terminal apparatus for receiving resources allocated from a base station in an Orthogonal Frequency Division Multiple Access (OFDMA) mobile communication system, the terminal apparatus comprising:

a reception unit for receiving first and second resource allocation information including at least one channel element identifier, over at least one data control channel; and

a controller for analyzing the first resource allocation information according to a previously known first channel element identifier length, to determine at least one channel element indicated by the first resource allocation information, for determining a second channel element identifier length according to a number of remaining channel elements obtained by excluding a number of channel elements indicated by the first resource allocation information from a number of allocable channel elements, and for analyzing the second resource allocation information according to the second channel element identifier length, to determine a channel element indicated by the second resource allocation information.

32. The terminal apparatus of claim 31, wherein the first resource allocation information and the second resource allocation information are simultaneously transmitted over different data control channels.

33. The terminal apparatus of claim 32, wherein the data control channels are allocated to terminals having an identical Channel Quality Indicator (CQI) level, and their channel element identifiers are determined in order of a data control channel having a low CQI level.

34. The terminal apparatus of claim 31, wherein the first resource allocation information and the second resource allocation information indicate channel elements allocated to different terminals, and are transmitted over one data control channel.

35. A base station apparatus for allocating resources to at least one terminal in an Orthogonal Frequency Division Multiple Access (OFDMA) mobile communication system, the base station apparatus comprising:

a downlink scheduler and controller for determining a first channel element identifier length according to a number of allocable channel elements, for determining first resource allocation information including at least one channel element identifier indicating at least one channel element allocated for data transmission using the first channel element identifier length, for determining a second channel element identifier length according to a number of remaining channel elements obtained by excluding a number of at least one channel elements allocated through the first resource allocation information from a number of the channel elements, when there is a need for additionally allocating resources, and for determining second resource allocation information including at least one channel element identifier indicating at least one channel element allocated for data transmission, using the second channel element identifier length; and

a transmission unit for transmitting the first and second resource allocation information over at least one data control channel.

36. The base station apparatus of claim 35, wherein the first and second resource allocation information are simultaneously transmitted over different data control channels.

37. The base station apparatus of claim 36, wherein the data control channels are allocated to terminals having an identical Channel Quality Indicator (CQI) level, and their channel element identifiers are determined in order of a data control channel having a low CQI level.

38. The base station apparatus of claim 35, wherein the first resource allocation information and the second resource allocation information indicate channel elements allocated to different terminals, and are transmitted over one data control channel.