Method and apparatus for reporting a Buffer Status using Node B-estimated Buffer Status information in a mobile communication system

• US 20060246847A1
• Filed: 04/04/2006
• Published: 11/02/2006
• Est. Priority Date: 04/04/2005
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jeong, Kyeong-In, Kwak, Yong-Jun, Kim, Soeng-Hun, Lee, Kook-Heui, Kwak, No-Jun
• Application Number:
  US11/396,906
• Publication Number:
  US 20060246847A1
• Time in Patent Office: Days
• US Class Current: 455/69
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/30 in combination with information about buffer occupancy at either end or at transit nodes
• CPC Class Codes: H04W 28/0205 at the air interface dynamic wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 28/0278 using buffer status reports dynamic wireless traffic scheduling definition H04W72/12
• CPC Class Codes: H04W 28/12 using signalling between network elements
• CPC Class Codes: H04W 28/14 using intermediate storage

Abstract

A method and apparatus for reporting a Buffer Status (BS) using Node B-estimated BS information in a mobile communication system are provided. A Node B-estimated BS and an actual BS of a User Equipment (UE) are monitored. A value of the Node B-estimated BS is compared with a first threshold value. If the Node B-estimated BS value is less than the first threshold, a determination is made as to whether the value of the actual BS is more than a second threshold. If the actual BS value is more than the second threshold, a Buffer Status Report (BSR) indicative of the actual BS is transmitted to a Node B.

Claims

1. A method for reporting a Buffer Status (BS) using Node B-estimated BS information in a mobile communication system, the method comprising:

monitoring a Node B-estimated BS and an actual BS of a User Equipment (UE);

comparing a value of the Node B-estimated BS with a first threshold;

determining whether a value of the actual BS is more than a second threshold if the Node B-estimated BS value is less than the first threshold; and

transmitting a Buffer Status Report (BSR) indicative of the actual BS to a Node B if the actual BS value is more than the second threshold.

2. The method of claim 1, wherein the Node B-estimated BS has a value computed by subtracting an amount of data transmitted between a BS reporting time and a current time from a value of a latest reported BS.

3. The method of claim 1, wherein the actual BS comprises a sum of data necessary to report the BS among data buffered in the UE.

4. The method of claim 1, wherein the first threshold is a product of a current transmission rate of the UE and a sum of an estimated time required for BSR transmission and a margin.

5. The method of claim 1, wherein the second threshold is set equal to the first threshold or is set to a value that is greater than the first threshold.

6. The method of claim 1, further comprising:

continuously monitoring the Node B-estimated BS and the actual BS when the Node B-estimated BS value is greater than or equal to the first threshold or the actual BS value is less than or equal to the second threshold.

7. A method for reporting a Buffer Status (BS) using Node B-estimated BS information in a mobile communication system, the method comprising:

monitoring a Node B-estimated BS and an actual BS of a User Equipment (UE);

determining whether a value of the actual BS is more than a first threshold;

comparing a value of the Node B-estimated BS with a second threshold if the actual BS value is less than the first threshold; and

transmitting a Buffer Status Report (BSR) indicative of the actual BS to a Node B if the actual BS value is more than the second threshold.

8. The method of claim 7, wherein the Node B-estimated BS comprises a value computed by subtracting an amount of data transmitted between a BS reporting time and a current time from a value of a latest reported BS.

9. The method of claim 7, wherein the actual BS comprises a sum of data necessary to report the BS among data buffered in the UE.

10. The method of claim 7, wherein the first threshold is a product of a current transmission rate of the UE and a sum of an estimated time required for BSR transmission and a margin.

11. The method of claim 7, wherein the second threshold is set equal to the first threshold or is set to a value that is a value greater than the first threshold.

12. The method of claim 7, further comprising:

continuously monitoring the Node B-estimated BS and the actual BS when the actual BS value is greater than or equal to the first threshold or the Node B-estimated BS value is less than or equal to the second threshold.

13. A method for reporting a Buffer Status (BS) using Node B-estimated BS information in a mobile communication system, the method comprising:

monitoring a Node B-estimated BS and an actual BS of a User Equipment (UE);

checking a first condition that a value of the Node B-estimated BS is less than a first threshold and a value of the actual BS is more than a second threshold, in order to determine whether a new BS is required to be reported;

checking a second condition that the actual BS value is less than a third threshold and the Node B-estimated BS is more than a fourth threshold; and

transmitting a Buffer Status Report (BSR) indicative of the actual BS to a Node B if at least one of the first and second conditions is satisfied.

14. The method of claim 13, wherein the Node B-estimated BS comprises a value computed by subtracting an amount of data transmitted between a BS reporting time and a current time from a value of a latest reported BS.

15. The method of claim 13, wherein the actual BS comprises a sum of data necessary to report the BS among data buffered in the UE.

16. The method of claim 13, wherein the first or third threshold is a product of a current transmission rate of the UE and a sum of an estimated time required for BSR transmission and a margin.

17. The method of claim 13, wherein the second or fourth threshold is set equal to the first threshold or is set to a value that is a value greater than the first threshold.

18. The method of claim 13, further comprising:

continuously monitoring the Node B-estimated BS and the actual BS when both the first and second conditions are not satisfied.

19. An apparatus for reporting a Buffer Status (BS) using Node B-estimated BS information in a mobile communication system, the apparatus comprising:

a BS monitor for monitoring an actual BS of a User Equipment (UE);

a Buffer Status Report (BSR) controller for managing a Node B-estimated BS, comparing a value of the Node B-estimated BS and a value of the actual BS with at least two thresholds, and determining whether a new BS is required to be reported;

a BS reporter for receiving information about the actual BS from the BS monitor when the BSR controller determines that the new BS is required to be reported, and generating a BSR message; and

a transmitter for transmitting the BSR message generated from the BS reporter to a Node B.

20. The apparatus of claim 19, wherein the Node B-estimated BS comprises a value computed by subtracting an amount of data transmitted between a BS reporting time and a current time from a value of a latest reported BS.

21. The apparatus of claim 19, wherein the actual BS comprises a sum of data necessary to report the BS among data buffered in the UE.

22. The apparatus of claim 19, wherein the BSR controller sets an operation for transmitting a BSR indicative of the actual BS to the Node B when the Node B-estimated BS value is less than a first threshold and the actual BS value is more than a second threshold.

23. The apparatus of claim 19, wherein the BSR controller sets an operation for transmitting a BSR indicative of the actual BS to the Node B when the actual BS value is less than a first threshold and the Node B-estimated BS value is more than a second threshold.

24. The apparatus of claim 19, wherein the BSR controller checks a first condition that the Node B-estimated BS value is less than a first threshold and the actual BS value is more than a second threshold, in order to determine whether the new BS is required to be reported,

checks a second condition that the actual BS value is less than a third threshold and the Node B-estimated BS is more than a fourth threshold, and

sets an operation for transmitting a BSR indicative of the actual BS to the Node B if at least one of the first and second conditions is satisfied.

25. The apparatus of claim 23, wherein at least one of the first and third threshold is a product of a current transmission rate of the UE and a sum of an estimated time required for BSR transmission and an arbitrary positive integer indicative of a margin.

26. The apparatus of claim 24, wherein at least one of the first and third threshold is a product of a current transmission rate of the UE and a sum of an estimated time required for BSR transmission and an arbitrary positive integer indicative of a margin.

27. The apparatus of claim 25, wherein at least one of the first and third threshold is a product of a current transmission rate of the UE and a sum of an estimated time required for BSR transmission and an arbitrary positive integer indicative of a margin.

28. The apparatus of claims 23, wherein at least one of the second and fourth threshold is set equal to the first or third threshold or is set to a value that is an arbitrary value greater than the first or third threshold.

29. The apparatus of claims 24, wherein at least one of the second and fourth threshold is set equal to the first or third threshold or is set to a value that is an arbitrary value greater than the first or third threshold.

30. The apparatus of claims 25, wherein at least one of the second and fourth threshold is set equal to the first or third threshold or is set to a value that is an arbitrary value greater than the first or third threshold.