Wireless high-speed data network planning tool

• US 20060276195A1
• Filed: 03/01/2006
• Published: 12/07/2006
• Est. Priority Date: 06/03/2005
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Nordling, Nikus
• Granted Patent: US 7,580,712 B2
• Time in Patent Office: Days
• US Class Current: 455/446
• CPC Class Codes: H04L 41/145 involving simulating, designing, planning or modelling of a network
• CPC Class Codes: H04L 41/5003 Managing SLA; Interaction between SLA and QoS
• CPC Class Codes: H04L 41/507 Filtering out customers affected by service problems
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: Y10S 370/913 Wireless or radio

Abstract

Tools and methods are provided to model and simulate the high-speed data channel and the traffic scheduling function, and tools and methods to simultaneously simulate the high-speed data channel and other voice and data services sharing the same radio carrier. The tools and methods estimate the quality of service and the capacity of the high-speed data channel, and also estimate the impact of the high-speed data channels on the quality of service and traffic capacity of other voice and data services on the same radio channel. The tools and method can be used in a wireless network planning tool to analyze a network that uses a radio carrier exclusively for high-speed data channels, such as cdma2000 EV-DO. The tools and method can also be used to analyze a network that combines high-speed data channels and CDMA based services on the same radio carrier, such as cdma2000 EV-DV or WCDMA HSDPA.

Claims

1. A computer program product stored on a medium which, when executed by a computer, performs steps of:

(1) assigning total output power values for plural cells of a modeled wireless communications network;

(2) distributing plural user equipment unit among the plural cells;

(3) determining, for a first cell, transmit power needed for services and channels in the first cell other than power for a high speed downlink packet service;

(4) using needed transmit power as determined by step (3) for determining power available in the first cell for the high speed downlink packet service;

(5) using power available as determined by step (4) for determining received power at a first user equipment unit on a high speed downlink packet service data channel;

(6) determining total interference received by the first user equipment unit from the plural cells;

(7) using received high speed service data channel power as determined by step (5) and total interference as determined by step (6) for determining a high speed downlink packet service data rate for the first user equipment unit;

(8) performing step (5) through step (7) for the plural user equipment units in the first cell and using the high speed downlink packet service data rates for the plural user equipment units to obtain a high speed downlink packet service data rate for the first cell.

2. The computer program product of claim 1, further comprising generating an output reflective of the high speed downlink packet service data rate for the first cell.

3. The computer program product of claim 1, wherein step (4) comprises subtracting signaling power for the high speed downlink packet service from the needed transmit power.

4. The computer program product of claim 1, wherein step (6) includes determining the total interference for the plural cells using a high speed downlink packet service activity factor, the high speed downlink packet service activity factor being related to demand for the high speed downlink packet service by plural user equipment units in at least one of the plural cells.

5. The computer program product of claim 4, wherein the high speed downlink packet service activity factor for the first cell is determined by dividing an average data rate demanded by the plural user equipment units in the first cell by the high speed downlink packet service data rate for the first cell.

6. The computer program product of claim 1, wherein step (7) further involves using a scheduling gain factor for determining the high speed downlink packet service data rate for the first user equipment unit.

7. The computer program product of claim 6, wherein the scheduling gain factor results from using an intelligent scheduler that takes advantage of fluctuations in a signal-to-interference ratio.

8. The computer program product of claim 7, wherein the scheduling gain factor is obtained either from a lookup table or by a Monte Carlo simulation.

9. The computer program product of claim 1, further comprising generating an output reflective of the high speed downlink packet service data rate for the first cell.

10. The computer program product of claim 1, wherein determining the total interference of step (6) excludes an orthogonal part of the power received from a best serving cell of the plural cells.

12. The method of claim 1, further comprising generating an output reflective of the high speed downlink packet service data rate for the first cell.

14. The method of claim 1, wherein step (6) includes determining the total interference for the plural cells using a high speed downlink packet service activity factor, the high speed downlink packet service activity factor being related to demand for the high speed downlink packet service by plural user equipment units in at least one of the plural cells.

15. The method of claim 14, wherein the high speed downlink packet service activity factor for the first cell is determined by dividing an average data rate demanded by the plural user equipment units in the first cell by the high speed downlink packet service data rate for the first cell.

11. A method of testing a configuration of a wireless communications network comprising:

(1) assigning total output power values for plural cells of a modeled wireless communications network;

(2) distributing plural user equipment unit among the plural cells;

(3) determining, for a first cell, transmit power needed for services and channels in the first cell other than power for a high speed downlink packet service;

(4) using needed transmit power as determined by step (3) for determining power available in the first cell for the high speed downlink packet service;

(5) using power available as determined by step (4) for determining received power at a first user equipment unit on a high speed downlink packet service data channel;

(6) determining total interference received by the first user equipment unit from the plural cells;

(7) using received high speed service data channel power as determined by step (5) and total interference as determined by step (6) for determining a high speed downlink packet service data rate for the first user equipment unit;

(8) performing step (5) through step (7) for the plural user equipment units in the first cell and using the high speed downlink packet service data rates for the plural user equipment units to obtain a high speed downlink packet service data rate for the first cell.

13. The method of claim 11, wherein step (4) comprises subtracting signaling power for the high speed downlink packet service from the needed transmit power.

16. The method of claim 11, wherein step (7) further involves using a scheduling gain factor for determining the high speed downlink packet service data rate for the first user equipment unit.

17. The method of claim 16, wherein the scheduling gain factor results from using an intelligent scheduler that takes advantage of fluctuations in a signal-to-interference ratio.

18. The method of claim 17, wherein the scheduling gain factor is obtained either from a lookup table or by a Monte Carlo simulation.

19. The method of claim 11, further comprising generating an output reflective of the high speed downlink packet service data rate for the first cell.

20. The method of claim 11, wherein determining the total interference of step (6) excludes an orthogonal part of the power received from a best serving cell of the plural cells.