Method and system for allocating resources in a communication system

• US 7,853,262 B2
• Filed: 02/07/2007
• Issued: 12/14/2010
• Est. Priority Date: 02/07/2006
• Status: Active Grant

• Current Assignee: Korea Advanced Institute of Science and Technology, Samsung Electronics Co. Ltd.
• Original Assignee: Korea Advanced Institute of Science and Technology, Samsung Electronics Co. Ltd.
• Inventors: Lee, Hwang-Soo, Lee, Soo-Bin, Nam, Chang-Hyun, Lee, Jae-Ki, Cheon, Jung-Hoon
• Primary Examiner(s): Afshar; Kamran
• Assistant Examiner(s): Ngo; Chuong A
• Application Number:
  US11/703,597
• Publication Number:
  US 20070201404A1
• Time in Patent Office: 1,406 Days
• Field of Search: 370329-337, 370/332, 370/310, 455450-453, 455/464, 455509-513
• US Class Current: 455/450
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/2416 Real-time traffic
• CPC Class Codes: H04L 47/2441 relying on flow classification, e.g. using integrated services [IntServ]
• CPC Class Codes: H04L 47/29 using a combination of thresholds
• CPC Class Codes: H04L 47/365 Dynamic adaptation of the packet size
• CPC Class Codes: H04L 47/50 Queue scheduling
• CPC Class Codes: H04L 47/522 Dynamic queue service slot or variable bandwidth allocation
• CPC Class Codes: H04L 47/56 implementing delay-aware scheduling
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

Provided are a system and a method for allocating resources in a communication system. The method includes mapping a Transmission Time Interval (TTI) class according to channel information transmitted from a mobile station and service class information of the mobile station; and allocating resources by dynamically configuring a frame based on the mapped TTI class.

Claims

1. A method for allocating resources in a communication system, the method comprising:

mapping a Transmission Time Interval (TTI) class according to downlink channel information transmitted from a mobile station and a service characteristic of downlink traffic transmitted to the mobile station; and

allocating resources by dynamically configuring a frame according to the mapped TTI class,

wherein the mapping of the TTI class comprises classifying a packet to be transmitted according to the downlink channel information and the service characteristic of the downlink traffic, and selecting a subframe category corresponding to the mapped TTI class according to the classified packet.

2. The method of claim 1, wherein the mapping the TTI class comprises recording the downlink channel information based on Channel Quality Information (CQI) transmitted from the mobile station.

3. The method of claim 1, wherein the TTI class comprises at least two classes.

4. The method of claim 1, wherein the allocating the resources comprises transmitting frame configuration information to the mobile station through a shared control channel after dynamically configuring the frame.

5. A method for allocating resources in a communication system, the method comprising:

classifying a packet according to a service characteristic of downlink traffic and downlink channel information when the packet is transmitted from a higher layer;

selecting a subframe category of the classified packet;

performing scheduling for the selected subframe category; and

allocating resources according to the scheduling.

6. The method of claim 5 wherein the scheduling comprises setting scheduling for a subframe category 1 when the selected subframe category is the subframe category 1 and configuring a Medium Access Control (MAC) frame for the subframe category 1;

setting scheduling for a subframe category 2 when the selected subframe category is the subframe category 2 and configuring a MAC frame for the subframe category 2; and

setting scheduling for a subframe category 3 when the selected subframe category is the subframe category 3 and configuring a MAC frame for the subframe category 3 using the MAC frame for the subframe category 2.

7. The method of claim 5 wherein the selecting the subframe category comprises selecting the subframe category according to a service category of the packet transmitted from the upper layer.

8. The method of claim 7, wherein the service category is classified according to one of a real-time and non-real-time characteristic of the transmitted packet.

9. The method of claim 7, wherein the selecting the subframe category further comprises determining a channel state for a service category and allocating a frame by selecting a subframe category according to a comparison result after comparing the channel state with thresholds.

10. The method of claim 9, wherein the allocating the frame comprises comparing Channel State Information (CSI) of a service category 1 with a first threshold;

mapping a frame to a subframe category 1 when the CSI of traffic for the service category 1 is less than the first threshold; and

mapping a frame to a subframe category 2 when the CSI of traffic for the service category 1 is greater than or equal to the first threshold.

11. The method of claim 10, wherein the allocating the frame further comprises comparing CSI of a service category 2 with the first threshold;

mapping the frame to the subframe category 1 when the CSI of traffic for the service category 2 is less than the first threshold;

comparing the CSI with a second threshold when the CSI of the traffic for the service category 2 is greater than or equal to the first threshold;

mapping the frame to the subframe category 2 when the CSI of the traffic for the service category 2 is less than the second threshold; and

mapping a frame to a subframe category 3 when the CSI of the traffic for the service category 2 is greater than or equal to the second threshold.

12. The method of claim 11, wherein the first threshold is set to be less than the second threshold.

13. The method of claim 11, wherein the allocating the frame further comprises comparing CSI of the service category 3 with the second threshold;

mapping the frame to the subframe category 2 when the CSI of traffic for the service category 3 is less than the second threshold; and

mapping the frame to the subframe category 3 when the CSI of the traffic for the service category 3 is greater than or equal to the second threshold.

14. The method of claim 5, wherein the selecting the subframe category comprises selecting the subframe category by considering a service characteristic and a channel state of the packet transmitted from the upper layer.

15. The method of claim 5, wherein the allocating the resources comprises performing frame concatenation and time-frequency resource allocation.

16. A system for allocating resources in a communication system, the system comprising:

a mobile station for periodically transmitting downlink channel information to a base station; and

the base station for accumulating the downlink channel information transmitted from the mobile station, selecting a Transmission Time Interval (TTI) according to a service characteristic of downlink traffic transmitted to the mobile station and the downlink channel information transmitted from the mobile station, and allocating resources by dynamically configuring a frame according to the selected TTI class,

wherein the base station classifies a packet to be transmitted according to the downlink channel information and service characteristic of downlink traffic and selects a subframe category corresponding to the selected TTI class according to the classified packet.

17. The system of claim 16, wherein the base station selects the TTI from among a finite number of TTIs according to the service characteristic of downlink traffic and the downlink channel information.

18. The system of claim 16, wherein the base station transmits frame configuration information to the mobile station through a shared control channel after dynamically configuring the frame.