Method of determining reverse data rate in mobile communication system

• US 20040228288A1
• Filed: 05/12/2004
• Published: 11/18/2004
• Est. Priority Date: 05/12/2003
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Ki Jun, Yun, Young Woo, Kwon, Soon Yil, Seol, Jee Woong
• Granted Patent: US 7,433,313 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04W 28/20 Negotiating bandwidth

Abstract

A method determines the data rate of traffic data to be transmitted from a mobile station to a base station in a mobile communication system, by considering a delay time required for the generation and transfer of data rate control information. The method includes steps of transmitting control information to the base station, the control information corresponding to the traffic data of an ith frame, the ith frame having a predetermined data rate; receiving, in response to the transmitted control information, data rate control information from the base station, the data rate control information including an instruction; and determining a maximum data rate of the traffic data to be transmitted during a next frame, by applying the instruction of the data rate control information to the predetermined data rate of the ith frame.

Claims

1. A method of determining a data rate for traffic data to be transmitted from a mobile station to a base station in a mobile communication system, the method comprising steps of:

transmitting control information to the base station, the control information corresponding to the traffic data of an ith frame, the ith frame having a predetermined data rate;

receiving, in response to the transmitted control information, data rate control information from the base station, the data rate control information including an instruction; and

determining a maximum data rate of the traffic data to be transmitted during a next frame, by applying the instruction of the data rate control information to the predetermined data rate of the ith frame.

2. The method as claimed in claim 1, wherein the predetermined data rate of the ith frame is referenced to determine the data rate of an (i+β

)th frame of the traffic data, where β

is a delay time measured in whole frames required for generation and transfer of the data rate control information.

3. The method as claimed in claim 2, wherein data transitions of (i+Nβ

)th, (i+(Nβ

+1))th, . . . , (i+(Nβ

+(β

−

1)))th frames of the traffic data are independently determined, where N is a natural number representing a progression by β

frames.

4. The method as claimed in claim 3, wherein frames affected by the data rate transition correspond to a number of time-division virtual channels.

5. The method as claimed in claim 4, wherein the number of time-division virtual channels is equal to β

.

6. The method as claimed in claim 1, wherein the control information includes data rate information of the traffic data of the ith frame and status information of the mobile station.

7. The method as claimed in claim 6, wherein the status information of the mobile station indicates currently available traffic channel transmission power and currently remaining buffer capacity.

8. The method as claimed in claim 7, wherein the data rate control information is generated based on mobile station status information received from a plurality of mobile stations within a cell.

9. The method as claimed in claim 1, wherein the instruction of the data rate control information is one of an n-step increment and an m-step decrement, where n and m are integers greater than or equal to one.

10. The method as claimed in claim 1, wherein the instruction of the data rate control information is one of an n-step increment, an m-step decrement, and a hold, where n and m are integers greater than or equal to one.

11. The method as claimed in claim 1, wherein, if the mobile communication system supports a hybrid automatic repeat request, the data rate control information is simultaneously transmitted together with retransmission control information.

12. The method as claimed in claim 11, wherein the retransmission control information is one of a NACK message and an ACK message.

13. The method as claimed in claim 1, wherein the control information is transmitted via a first channel and the traffic data is transmitted via a second channel.

14. The method as claimed in claim 13, wherein the first channel is a reverse control channel and the second channel is a reverse traffic channel.

15. The method as claimed in claim 1, further comprising a step of determining a substantial data rate of the traffic data to be transmitted on the next frame according to a data transmission capacity of the mobile station, by taking the determined maximum data rate as an upper limit.

16. The method as claimed in claim 15, wherein the data transmission capacity of the mobile station is determined by an amount of data to be transmitted and an available power for transmission of the traffic data.