Apparatus and method for operating frequency resources in a mobile communication system

• US 20070093252A1
• Filed: 09/26/2006
• Published: 04/26/2007
• Est. Priority Date: 09/26/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lim, Eun-Taek, Park, Dong-Seek, Kim, Young-Kyun, Cho, Young-Kwon, Jung, Jun-Young, Fitzek, Frank, Koo, Jin-Kyu, Prasad, Ramjee, Reynisson, Ragnar, Rahman, Muhammad
• Granted Patent: US 7,768,987 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04B 1/7156 Arrangements for sequence synchronisation
• 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 1/0033 arrangements specific to the transmitter
• CPC Class Codes: H04L 5/0044 allocation of payload

Abstract

A frequency resource operating apparatus and method for transmitting and receiving data at a different hopping pattern speed according to a CSI in a BWA communication system are provided. In a method of transmitting and receiving data using CSI in a mobile communication system, a BS sets the CSI of an MS to an initial CSI and sends data to the MS according to the initial CSI. The MS sends a downlink CSI to the BS. The BS groups the MS based on the downlink CSI and sends data to the MS according to a hopping pattern for the group of the MS among hopping patterns preset for predetermined groups.

Claims

1. A method of transmitting and receiving data using Channel State Information (CSI) in a mobile communication system, comprising the steps of:

setting the CSI of a Mobile Station (MS) to an initial CSI and transmitting data to the MS according to the initial CSI by a Base Station (BS);

transmitting a downlink CSI to the BS by the MS;

grouping the MS based on the downlink CSI by the BS; and

transmitting data to the MS according to a hopping pattern for the group of the MS among hopping patterns preset for predetermined groups by the BS.

2. The method of claim 1, wherein the grouping step comprises grouping the MS and other MSs with the same CSI into the same group.

3. The method of claim 2, wherein one band is allocated to each of the groups.

4. The method of claim 1, wherein a predetermined number of CSIs are defined according to coherence time and coherence bandwidth.

5. The method of claim 1, wherein if the CSI indicates a slow channel change, at least one of a fast band hopping pattern and a fast subcarrier hopping pattern is applied.

6. The method of claim 1, wherein if the CSI indicates a fast channel change, at least one of a slow band hopping pattern and a slow subcarrier hopping pattern is applied.

7. The method of claim 1, wherein the transmission step comprises applying the fast subcarrier hopping pattern and the fast band hopping pattern to the group of the MS according to the CSI.

8. The method of claim 1, wherein the transmission step comprises applying the fast subcarrier hopping pattern and a slow band hopping pattern to the group of the MS according to the CSI.

9. The method of claim 1, wherein the transmission step comprises applying a slow subcarrier hopping pattern and the fast band hopping pattern to the group of the MS according to the CSI.

10. The method of claim 1, wherein the transmission step comprises applying the slow subcarrier hopping pattern and the slow band hopping pattern to the group of the MS according to the CSI.

11. A method of transmitting and receiving data using Channel State Information (CSI) in a mobile communication system, comprising the steps of:

receiving a random access signal from at least one Mobile Station (MS) by a Base Station (BS);

determining the CSI of the at least one MS to be an initial CSI and allocating frequency resources to the at least one MS based on the initial CSI by the BS;

sending data using the allocated frequency resources to the BS by the at least one MS;

measuring the CSI of the at least one MS operating based on the initial CSI by the BS;

regrouping the at least one MS according to the measured CSI by the BS; and

allocating different frequency resources to groups according to the CSIs of the groups and sending data to the at least one MS by the BS.

12. The method of claim 11, wherein the CSI measuring step comprises measuring the coherence time and coherence bandwidth of the at least one MS.

13. The method of claim 11, wherein the regrouping step comprises grouping MSs into a plurality of group according to the CSIs of the MSs such that MSs with the same CSI belong to the same group.

14. The method of claim 11, wherein the frequency resource allocation step comprises applying different hopping patterns according to the CSIs of the groups.

15. The method of claim 11, wherein if the CSI indicates a slow channel change, at least one of a fast band hopping pattern and a fast subcarrier hopping pattern is applied.

16. The method of claim 11, wherein if the CSI indicates a fast channel change, at least one of a slow band hopping pattern and a slow subcarrier hopping pattern is applied.

17. The method of claim 11, wherein the fast subcarrier hopping pattern and the fast band hopping pattern are applied to a group according to the CSI of the group.

18. The method of claim 11, wherein the fast subcarrier hopping pattern and a slow band hopping pattern are applied to a group according to the CSI of the group.

19. The method of claim 12, wherein a slow subcarrier hopping pattern and the fast band hopping pattern are applied to a group according to the CSI of the group.

20. The method of claim 11, wherein the slow subcarrier hopping pattern and the slow band hopping pattern are applied to a group according to the CSI of the group.

21. A system for transmitting and receiving data using Channel State Information (CSI) in a mobile communication system, comprising:

a Base Station (BS) for grouping Mobile Stations (MSs) into predetermined groups according to the CSIs of the MSs, applying different hopping patterns to the groups according to the CSIs of the groups, and transmitting and receiving data to and from the MSs of the groups according to the hopping patterns applied to the groups; and

an MS for transmitting and receiving data to and from the BS according to a hopping pattern determined for the MS by the BS.

22. The system of claim 21, wherein if the CSI of a group indicates a slow channel change, the BS applies at least one of a fast band hopping pattern and a fast subcarrier hopping pattern to the group.

23. The system of claim 21, wherein if the CSI of a group indicates a fast channel change, the BS applies at least one of a slow band hopping pattern and a slow subcarrier hopping pattern to the group.

24. The system of claim 21, wherein the BS applies the fast subcarrier hopping pattern and the fast band hopping pattern to a group according to the CSI of the group.

25. The system of claim 21, wherein the BS applies the fast subcarrier hopping pattern and a slow band hopping pattern to a group according to the CSI of the group.

26. The system of claim 21, wherein the BS applies a slow subcarrier hopping pattern and the fast band hopping pattern to a group according to the CSI of the group.

27. The system of claim 21, wherein the BS applies the slow subcarrier hopping pattern and the slow band hopping pattern to a group according to the CSI of the group.

28. The system of claim 21, wherein the BS comprises a transmitter for determining first hopping patterns for the MSs according to the CSIs of the MSs, mapping subcarriers according to the first hopping patterns, and changing frequency values according to second hopping patterns corresponding to the CSIs.

29. The system of claim 21, wherein the BS comprises a receiver for receiving the CSIs of the MSs, applying first hopping patterns according to the CSIs, changing frequency values according to the first hopping patterns, performing a baseband process according to the changed frequency values, and distinguishing signals from the MSs according to second hopping patterns corresponding to the CSIs.

30. The system of claim 21, wherein the MS comprises a transmitter for configuring a channel according to a decided first hopping pattern, changing a frequency value according to a second hopping pattern corresponding to the CSI of the MS, and sending data using the changed frequency value.

31. The system of claim 21, wherein the MS comprises a receiver for changing a frequency value according to a first hopping pattern corresponding to a decided CSI, performing a baseband process according to the changed frequency value, and processing received data according to a second hopping pattern corresponding to the CSI.