Asymmetric broadband data radio network

• US 8,406,168 B2
• Filed: 03/13/2009
• Issued: 03/26/2013
• Est. Priority Date: 03/13/2009
• Status: Active Grant

• Current Assignee: Harris Global Communications, Inc. (L3Harris Technologies, Inc.)
• Original Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Inventors: Richeson, Steven D., Adrick, Jay C.
• Primary Examiner(s): Rinehart, Mark
• Assistant Examiner(s): ANWAR, MOHAMMAD S
• Application Number:
  US12/403,594
• Publication Number:
  US 20100232355A1
• Time in Patent Office: 1,474 Days
• Field of Search: 370/328, 370/338, 370/332
• US Class Current: 370/328
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

An asymmetric wireless network (100) includes a first base station (104) including a RF transceiver (208) having a first transmission range, a first transmit data rate, and a first coverage area. The wireless network also includes a second base station (106) comprising a RF transmitter (210) having a second transmission range, a second transmit data rate, and a second coverage area. In the wireless network, the second transmit data rate is greater than the first transmit data rate, the first and the second transmission ranges are substantially equal, and the first and the second coverage areas at least partially overlap. The wireless network also includes at least one computer network (108) communicatively coupling the base stations, configured for generating transmit data in response to a data request received at the first base station, and configured for routing the transmit data to the first or the second base station for transmission.

Claims

1. An asymmetric wireless network, comprising:

at least a first base station comprising a radio frequency (RF) transceiver having a first transmission range, a first transmit data rate, and a first coverage area;

at least a second base station comprising an RF transmitter having a second transmission range, a second transmit data rate, and a second coverage area, the second transmit data rate being greater than the first transmit data rate, and the first and the second coverage areas at least partially overlapping;

at least one computer network communicatively coupling the first and the second base stations; and

at least one processor in communication with the computer network, wherein the at least one processor is configured to

(1) receive a data request comprising a request to deliver response data to a mobile station located inside the first coverage area and inside the second coverage area, the mobile station having a first active bidirectional connection to the first base station over which the data request is communicated and having a first active uni-directional connection with the second base station,

(2) generate response data in response to a reception of the data request,

(3) obtain first information defining a plurality of criteria relating to communication performance,

(4) evaluate the plurality of criteria in accordance with a predetermined level of importance assigned to each criteria relative to all other said plurality of criteria;

(5) select a transmission path from among a plurality of transmission paths based on the first information and results of the evaluation, said plurality of transmission paths including a first path comprising the first base station and a second path comprising the second base station,

(6) cause a cue message to be routed to the mobile station via the first base station, the cue message indicating which transmission path was previously selected; and

(7) cause the response data to be routed to the mobile station via the second base station, without terminating the first active bidirectional connection;

wherein data requests and cue messages are exclusively communicated over the first active bi-directional connection.

2. The wireless network of claim 1, wherein the second base station comprises an RF broadcast service base station with one-way broadcast capability.

3. The wireless network of claim 1, wherein the first base station comprises an RF Public Safety base station with receive and transmit capability.

4. The wireless network of claim 1, wherein the processor is further configured to select the transmission path based on (i) a comparison of a quality of a first communications link between the first base station and the mobile station relative to a quality of a second communications link between the second base station and the mobile station, (ii) a file size of the response data, and (iii) a priority associated with the data request.

5. The wireless network of claim 4, wherein the priority associated with the data request is determined based on at least one member selected from the group consisting of (i) a request type of the data request, and (ii) a user associated with the mobile station.

6. The wireless network of claim 1, wherein the processor is further configured to select the transmission path based on a file size of the response data.

7. The wireless network of claim 6, wherein the processor is further configured to estimate an amount of time required to transmit the response data via the first path, and select said transmission path based on said estimate.

8. The wireless network of claim 1, wherein the processor is further configured to compare a quality of a first communications link between the first base station and the mobile station and a quality of a second communications link between the second base station and the mobile station, and to select said transmission path based on said comparison.

9. The wireless network of claim 1, wherein the plurality of criteria comprises (i) a priority value associated with the data request or the mobile station, (ii) a type identifier associated with the data request, (iii) a file size of the generated response, (iv) an evaluation of the link quality between the first base station and the mobile station, (v) an evaluation of the link quality between the second base station and the mobile station, and (vi) an evaluation of the traffic level in the second base station.

10. The wireless network of claim 1, wherein the processor is further configured to receive from the first base station at least one of location data or signal strength data originating from the mobile station, and wherein the plurality of criteria comprises the received data.

11. A method for exchanging data over an asymmetric wireless network including at least a first base station comprising a radio frequency (RF) transceiver having a first transmission range, a first transmit data rate, and a first coverage area, at least a second base station comprising a RF transmitter having a second transmission range, a second transmit data rate, and a second coverage area, and at least one computer network communicatively coupling the first and the second base stations, where the second transmit data rate is greater than the first transmit data rate, and the first and the second coverage areas are at least partially overlapping, the method comprising:

receiving at least one data request at the first base station, the data request comprising a request for response data to be delivered to a mobile station located inside the first coverage area and inside the second coverage area, the mobile station having a first active bidirectional connection to the first base station over which the data request was communicated and having a first active uni-directional connection with the second base station;

generating transmit data in the computer network in response to the data request;

obtaining first information defining a plurality of criteria relating to communication performance;

evaluating the plurality of criteria in accordance with a predetermined level of importance assigned to each criteria relative to all other said plurality of criteria;

selecting a transmission path from a plurality of transmission paths based on the first information and results of said evaluating step, the plurality of transmission paths including a first path comprising the first base station and a second path comprising the second base station;

causing a cue message to be routed to the mobile station via the first base station, the cue message indicating which transmission path was previously selected, and

routing the transmit data to the mobile station using the second base station, without terminating the first active bidirectional connection;

wherein data requests and cue messages are exclusively communicated over the first active bi-directional connection.

12. The method of claim 11, wherein the step of routing the transmit data further comprises selecting an RF broadcast service channel for transmission of the transmit data.

13. The method of claim 11, wherein the step of routing the transmit data further comprises selecting an RF Public Safety channel for transmission of the transmit data.

14. The method of claim 11, wherein the transmission path is selected based on (i) a comparison of a quality of a first communications link between the first base station and the mobile station relative to a quality of a second communications link between the second base station and the mobile station, (iii) a file size of the response data, and (iv) a priority associated with the data request.

15. The method of claim 11, wherein the transmission path is selected based on a file size of the response data.

16. The method of claim 15, wherein the transmission path is selected based on an estimation of an amount of time required to transmit the response data via the first path.

17. The method of claim 11, wherein the transmission path is selected based on a comparison of a quality of a first communications link between the first base station and the mobile station and a quality of a second communications link between the second base station and the mobile station.

18. The method of claim 11, wherein the transmission path is selected based on a priority associated with the data request, the priority being determined based on at least one member selected from the group consisting of (i) a request type of the data request, (ii) a user associated with the mobile station, and (iii) a value indicative of available transmission capacity in the second base station.

19. A mobile station, comprising:

a radio frequency (RF) transceiver configured to

transmit at least one data request to a first base station and

receive response data from at least one of the first base station associated with a first channel and a second base station associated with a second channel, the first base station being associated with a first transmit data rate and the second base station being associated with a second transmit data rate greater than the first transmit data rate;

a processing element communicatively coupled to the RF transceiver and configured to;

generate the data request;

cause the data request to be sent via the first base station;

obtain first information defining a plurality of criteria relating to communication performance;

evaluate the plurality of criteria in accordance with a predetermined level of importance assigned to each criteria relative to all other said plurality of criteria;

select one of the first and second channels for receiving the transmit data associated with the data request based on the first information and results of the evaluation;

cause a cue message to be routed to the mobile station via the first base station, the cue message indicating which of the first and second channels was previously selected; and

cause the response data to be routed to the mobile station via the second base station.

20. The mobile station of claim 19, wherein the second channel comprises a one-way RF broadcast service channel.

21. The mobile station of claim 19, wherein the first channel comprises a two-way RF Public Safety channel.

22. The mobile station of claim 19, wherein the processing element is further configured to select one of the first and the second base stations based on the quality of the communications link between the RF transceiver and the second base station by comparing a quality of a communications link between the first base station and the RF transceiver and the quality of the communications link between the second base station and the RF transceiver.

23. The mobile station of claim 19, wherein the processing element is further configured to (1) estimate a file size of the response data based on an analysis of the data request, and (2) select the second channel based on the file size of the response data.

24. The mobile station of claim 19, wherein the processing element is further configured to select one of the first and second channels based on a priority specified for the data request.