METHOD AND SYSTEM FOR ALLOCATING COMMUNICATION RESOURCES

• US 20080089431A1
• Filed: 12/13/2007
• Published: 04/17/2008
• Est. Priority Date: 06/15/2005
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Popovic, Branishlav, Van De Beek, Jaap, Mauritz, Oskar
• Granted Patent: US 8,488,531 B2
• Time in Patent Office: Days
• US Class Current: 375/260
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04B 2201/713 Frequency hopping
• CPC Class Codes: H04B 7/2615 using hybrid frequency-time division multiple access [FDMA-TDMA]
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/0012 Hopping in multicarrier systems for frequency hopping in spread spectrum systems H04B1/713
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0039 Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
• CPC Class Codes: H04L 5/0041 Frequency-non-contiguous
• CPC Class Codes: H04L 5/0082 at predetermined intervals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

The present invention relates to a method for allocating communication resources in a multi-user cellular communication system, wherein communication resources are divided in time periods and frequency sub-bands, wherein part of the communication resources are used for frequency-localized communication channels, and part of the communication resources are used for frequency distributed channels. The method further comprises the steps of classifying part of the frequency sub-bands as frequency sub-bands carrying frequency-distributed channels, classifying the remaining part of the frequency sub-bands as frequency sub-bands carrying frequency-localized channels. The present invention also relates to a system, a transmitter and a communication system.

Claims

1. Method for allocating communication resources for communication between a transmitter mid a receiver, in a multi-user cellular communication system, wherein communication resources are divided in time periods and frequency sub-bands, wherein part of the communication resources are used for frequency-localized communication channels, and part of the communication resources are used for frequency distributed channels, the method comprises:

classifying part of the frequency sub-bands as frequency sub-bands carrying frequency-distributed channels; and

classifying the remaining part of the frequency sub-bands as frequency sub-bands carrying frequency-localized channels.

2. Method according to claim 1, further comprising after performing the classification of the frequency sub-bands:

changing the classification from time period to time period, after a certain number of time intervals or at predetermined intervals.

3. Method according to claim 1, further comprising transmitting, on a broadcast channel, in the beginning of, or prior to, a time period, which sub-bands are of which type.

4. Method according to claim 1, wherein a code representing a particular arrangement of the communication resources is transmitted to the receiver, and wherein the code is used by the receiver to retrieve the communication resource scheme to be used.

5. Method according to claim 1, further comprising after performing the classification of the frequency sub-bands, keeping the performed classification from time period to time period.

6. Method according to claim 1, wherein the frequency-distributed channels comprise frequency hopping channels.

7. Method according to claim 6, wherein the frequency hopping channels are based on a generic hopping sequence and wherein sub-bands used by non-hopping channels are eliminated from the hopping sequence.

8. Method according to claim 1, wherein the frequency-distributed channels comprise one of time multiplexed channels, code multiplexed channels, and interleaved frequency multiplexed channels.

9. Method according to claim 1, wherein a scheduler is used to multiplex the frequency-localized channels onto the frequency sub-bands determined to be used for frequency-localized channels, and wherein the frequency-distributed channels are multiplexed onto the frequency sub-bands to be used for the frequency-distributed channels.

10. Method according to claim 1, wherein the time period is a time slot or a transmission frame.

11. System for allocating communication resources for communication between a transmitter and a receiver in a multi-user cellular communication system, wherein communication resources are divided in time periods and frequency sub-bands, wherein part of the communication resources are used for frequency-localized communication channels, and part of the communication resources are used for frequency-distributed channels, the system comprises a device configured to:

classify part of the frequency sub-bands as frequency sub-bands for carrying frequency-distributed channels, and

classify the remaining part of the frequency sub-bands as frequency sub-bands for carrying frequency-localized channels.

12. System according to claim 11, further comprising a device configured to change the classification from time period to time period, after a certain number of time intervals or at predetermined intervals.

13. System according to claim 11, further comprising a device configured to transmit, on a broadcast channel, in the beginning of, or prior to, a time period, which sub-bands are of which type.

14. System according to claim 11, further comprising a device configured to transmit a code representing a particular arrangement of the communication resources to the receiver.

15. System according to claim 11, further comprising a device configured to keep the performed classification from time period to time period.

16. System according to claim 11, wherein the frequency-distributed channels comprise frequency hopping channels.

17. System according to claim 16, wherein the frequency hopping channels are based on a generic hopping sequence, and wherein the system comprises a device configured to eliminate sub-bands used by non-hopping channels from the hopping sequence.

18. System according to claim 11, wherein the frequency-distributed channels comprise one of time multiplexed channels, code multiplexed channels, and interleaved frequency multiplexed channels.

19. A transmitter for use in a in a multi-user cellular communication system, comprising a device configured to:

classify part of frequency sub-bands as frequency sub-bands carrying frequency-distributed channels, and

classify the remaining part of the frequency sub-bands as frequency sub-bands carrying frequency-localized channels.

20. A multi-user cellular communication system having communication resources for communication between at least one transmitter and one receiver, comprising at least one transmitter configured to:

classify part of frequency sub-bands as frequency sub-bands carrying frequency-distributed channels, and

classify the remaining part of the frequency sub-bands as frequency sub-bands carrying frequency-localized channels.