DYNAMIC MBSFN AREA CONFIGURATION METHOD IN CONSIDERATION OF RADIO RESOURCE EFFICIENCY AND SYSTEM THEREOF

• US 20110007668A1
• Filed: 03/05/2009
• Published: 01/13/2011
• Est. Priority Date: 03/05/2008
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Shang, Dan, Zhou, Qi
• Granted Patent: US 9,642,116 B2
• Time in Patent Office: Days
• US Class Current: 370/254
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

A method and system determines an absolute Multicast-Broadcast Single Frequency Network (MBSFN) configuration based on a threshold. First saved radio resources and first wasted radio resources are calculated. The absolute MBSFN configuration is set as the final MBSFN configuration when the first saved radio resources are greater than or equal to the first wasted radio resources. When untrue, the absolute MBSFN configuration plus an adjacent cell pool is set as the final MBSFN configuration based on the final MBSFN configuration achieving a maximum value of second saved radio resources minus second wasted radio resources. When both of these conditions are untrue, the absolute MBSFN configuration minus an MBSFN cell pool is set as the final MBSFN configuration based on the final MBSFN configuration achieving a maximum value of third saved radio resources minus third wasted radio resources.

Claims

1. A method of dynamic Multicast-Broadcast Single Frequency Network (MBSFN) area configuration in consideration of radio resource efficiency comprising:

determining an absolute MBSFN configuration, the absolute MBSFN configuration defining a number of users in a new MBSFN area and a number of idle guard radio resources in an old MBSFN area;

calculating first saved radio resources by multiplying the number of users in the new MBSFN area by a first weight factor;

calculating first wasted radio resources by multiplying the number of idle guard radio resources in the old MBSFN area by a second weight factor;

setting the absolute MBSFN configuration as a final MBSFN configuration when the first saved radio resources are greater than or equal to the first wasted radio resources.

2. The method of claim 1, wherein the absolute MBSFN configuration is determined utilizing at least one of a number of users or a Signal-to-Interference Noise-Ratio (SINR).

3. The method of claim 1, wherein the second weight factor is calculated by multiplying a number of potential users in the idle guard radio resources in the old MBSFN area by a wasted radio resource weight factor.

4. The method of claim 3, wherein the first weight factor is substantially equal to the wasted radio resource weight factor.

5. The method of claim 1, wherein the absolute MBSFN configuration further defines upper and lower thresholds of cell pool parameters.

6. The method of claim 5, wherein the cell pool parameters comprise at least one of a number of users and a Signal-to-Interference Noise-Ratio (SINR).

7. The method of claim 6, further comprising:

selecting all cell pools adjacent to the new MBSFN area in which cell pool parameters of the adjacent cell pools exceed the lower threshold of cell pool parameters when the first saved radio resources are less than the first wasted radio resources;

selecting an adjacent cell pool from the adjacent cell pools such that second saved resources subtracted by second wasted resources achieves a maximum value when the adjacent cell pool is added to the absolute MBSFN configuration, wherein

the second saved resources are calculated by adding the number of users in the new MBSFN area to a number of new users in cells of the adjacent cell pool and multiplying by a third weight factor, and

the second wasted resources are calculated by adding the number of idle guard radio resources in the old MBSFN area to a number of idle guard radio resources in the cells of the adjacent cell pool and multiplying by a fourth weight factor; and

setting the cells of the adjacent cell pool and the absolute MBSFN configuration as the final MBSFN configuration.

8. The method of claim 7, wherein the first weight factor is substantially equal to the third weight factor.

9. The method of claim 7, wherein the second weight factor is substantially equal to the fourth weight factor.

10. The method of claim 7, further comprising:

selecting all MBSFN cell pools within the new MBSFN area in which cell pool parameters of the MBSFN cell pools are below the upper threshold of cell pool parameters when the cell pool parameters of the adjacent cell pools are below the lower threshold of cell pool parameters or when none of the adjacent cell pools are such that the second saved radio resources are less than the second wasted radio resources;

selecting an MBSFN cell pool from the MBSFN cell pools such that third saved resources subtracted by third wasted resources achieves a maximum value when the MBSFN cell pool is removed from the absolute MBSFN configuration, wherein

the third saved resources are calculated by subtracting the number of users in the new MBSFN area by a number of users in cells of the MBSFN cell pool and multiplying by a fifth weight factor, and

the third wasted resources are calculated by subtracting the number of idle guard radio resources in the new MBSFN area by a number of idle guard radio resources in the cells of the MBSFN cell pool and multiplying by a sixth weight factor; and

setting the cells of the absolute MBSFN configuration minus the cells of the MBSFN cell pool as the final MBSFN configuration.

11. The method of claim 10, wherein the first weight factor is substantially equal to each of the third weight factor and the fifth weight factor.

12. The method of claim 10, wherein the second weight factor is substantially equal to each of the fourth weight factor and the sixth weight factor.

13. A dynamic Multicast-Broadcast Single Frequency Network (MBSFN) area configuration system for comparing saved radio resources with wasted radio resources to set a final MBSFN configuration, the system comprising:

a core network for receiving data from multiple data sources;

multiple radio network subsystems coupled to the core network, each of the radio network subsystems comprising multiple radio network controllers coupled to multiple base stations, the multiple base stations defining cells, wherein contiguous cells are grouped together to comprise an MBSFN area;

a number of user equipments (UEs) configured to receive MBSFN signals from the cells;

an MBSFN configuration module for defining an absolute MBSFN configuration, the absolute MBSFN configuration defining a number of UEs in a new MBSFN area, a number of added idle guard radio resources in an old MBSFN area and an upper and lower threshold of cell pool parameters.

14. The dynamic MBSFN area configuration system of claim 13, wherein the MBSFN configuration module is configured to:

calculate first saved radio resources among the saved radio resources by multiplying a first weight factor by the number of UEs in the new MBSFN area;

calculate first wasted radio resources among the wasted radio resources by multiplying a second weight factor by the number of idle guard radio resources added to the old MBSFN area;

set the absolute MBSFN configuration as the final MBSFN configuration when the first saved radio resources are greater than or equal to the first wasted radio resources.

15. The dynamic MBSFN area configuration system of claim 14, wherein the absolute MBSFN configuration is determined utilizing at least one of a number of users or a Signal-to-Interference Noise-Ratio (SINR).

16. The dynamic MBSFN area configuration system of claim 14, wherein the second weight factor is calculated by multiplying a number of potential users in the idle guard radio resources in the old MBSFN area by a wasted radio resource weight factor.

17. The dynamic MBSFN area configuration system of claim 16, wherein the first weight factor is substantially equal to the wasted radio resource weight factor.

18. The dynamic MBSFN area configuration system of claim 14, wherein the MBSFN configuration module is further configured to:

select all cell pools adjacent to the new MBSFN area in which cell pool parameters of the adjacent cell pools exceed the lower threshold of cell pool parameters when the first saved radio resources are less than the first wasted radio resources;

select an adjacent cell pool from the adjacent cell pools such that second saved radio resources among the saved radio resources subtracted by second wasted radio resources among the wasted radio resources achieves a maximum value when the adjacent cell pool is added to the absolute MBSFN configuration, wherein

the second saved radio resources are calculated by adding the number of UEs in the new MBSFN area to a number of new UEs in cells of the adjacent cell pool and multiplying by a third weight factor, and

the second wasted radio resources are calculated by adding the number of idle guard radio resources in the old MBSFN area to a number of idle guard radio resources in the cells of the adjacent cell pool and multiplying by a fourth weight factor; and

set the cells of the adjacent cell pool and the absolute MBSFN configuration as the final MBSFN configuration.

19. The dynamic MBSFN area configuration system of claim 18, wherein the first weight factor is substantially equal to the third weight factor.

20. The dynamic MBSFN area configuration system of claim 18, wherein the second weight factor is substantially equal to the fourth weight factor.

21. The dynamic MBSFN area configuration system of claim 18, wherein the MBSFN configuration module is further configured to:

select all MBSFN cell pools within the new MBSFN area in which cell pool parameters of the MBSFN cell pools are below the upper threshold of cell pool parameters when the cell pool parameters of the adjacent cell pools are below the lower threshold of cell pool parameters or when none of the adjacent cell pools are such that the second saved radio resources are less than the second wasted radio resources;

select an MBSFN cell pool from the MBSFN cell pools such that third saved radio resources among the saved radio resources subtracted by third wasted radio resources among the wasted radio resources achieves a maximum value when the MBSFN cell pool is removed from the absolute MBSFN configuration, wherein

the third saved radio resources are calculated by subtracting the number of UEs in the new MBSFN area by a number of UEs in cells of the MBSFN cell pool and multiplying by a fifth weight factor, and

the third wasted radio resources are calculated by subtracting the number of idle guard radio resources in the new MBSFN area by a number of idle guard radio resources in the cells of the MBSFN cell pool and multiplying by a sixth weight factor; and

set the cells of the absolute MBSFN configuration minus the cells of the MBSFN cell pool as the final MBSFN configuration.

22. The dynamic MBSFN area configuration system of claim 21, wherein the first weight factor is substantially equal to each of the third weight factor and the fifth weight factor.

23. The dynamic MBSFN area configuration system of claim 21, wherein the second weight factor is substantially equal to each of the fourth weight factor and the sixth weight factor.