Multiple network access system and method

• US 8,548,520 B2
• Filed: 01/26/2007
• Issued: 10/01/2013
• Est. Priority Date: 01/26/2007
• Status: Active Grant

• Current Assignee: Quarterhill Inc. (f/k/a Wi-LAN Inc.)
• Original Assignee: Wi-LAN Inc.
• Inventors: Connors, Dennis P., Marsh, Gene W.
• Primary Examiner(s): Edouard, Patrick
• Assistant Examiner(s): WYCHE, MYRON
• Application Number:
  US11/627,897
• Publication Number:
  US 20080182616A1
• Time in Patent Office: 2,440 Days
• Field of Search: 455/3.04, 455/83, 455/88, 455/191.3, 455/425, 455/426.1, 455/435.2, 455/458, 455/552.1, 455/556.1, 455/434, 455/574, 455/407, 455/426.2, 455/432.2, 455/418, 725/62
• US Class Current: 455/552.1
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 36/144 over a different radio air interface technology

Abstract

Methods and devices for operating a wireless communication device that can communicate with at least two different wireless networks using a single radio frequency modem are described. The communication device attaches to a first wireless network through the radio frequency (RF) modem, and then detaches from the first wireless network at a predetermined time before a start time of a selected event on a second wireless network. The device attaches to the second wireless network using the same RF modem before the start time of the selected event and collects at least a portion of event data associated with the selected event. After collecting at least a portion of event data, the device detaches from the second wireless network and re-attaches to the first wireless network.

Claims

1. A method of operating a wireless communication device, the method comprising:

associating the wireless communication device with a first wireless network such that the wireless communication device establishes a logical connection with the first wireless network, wherein the wireless communication device includes a single radio frequency (RF) modem and wherein the first wireless network is a bidirectional wireless network;

attaching the wireless communication device with the first wireless network;

receiving, from the first wireless network via the single RF modem, information regarding a broadcast event to be received via a second wireless network beginning at a start time, wherein the second wireless network is a unidirectional broadcast wireless network;

detaching the wireless communication device from the first wireless network at a time prior to the start time of the broadcast event and attaching the wireless communication device with the second wireless network, wherein the logical connection with the first wireless network is maintained; and

receiving, from the second wireless network via the single RF modem, the broadcast event based on the information received from the first wireless network while the logical connection with the first wireless network is maintained.

2. The method as claimed in claim 1, wherein the broadcast event comprises a stream of data packets.

3. The method as claimed in claim 1, further comprising:

receiving time slice information associated with the broadcast event;

detaching with the second wireless network based on the time slice information; and

reattaching with the first wireless network based on the time slice information.

4. The method as claimed in claim 3, wherein the detaching with the first wireless network, association with the second wireless network, detaching with the second wireless network, and reattaching with the first wireless network are performed iteratively based on the time slice information.

5. The method as claimed in claim 3 wherein the time slice information is received in a media access control (MAC) module from an upper layer application module.

6. The method as claimed in claim 1, wherein at least one of the first wireless network and the second wireless network is a broadband wireless network.

7. The method of claim 1, wherein the first wireless network and the second wireless network operate over different network frequencies and the different network frequencies are stored by the wireless communication device and used by the single RF modem to tune to the respective wireless network frequency when attaching to a corresponding one of the first wireless network and the second wireless network.

8. The method of claim 1, further comprising:

downloading and storing, at the wireless communication device, electronic service guide (ESG) information associated with the second wireless network from an ESG server while the wireless communication device is associated with the first wireless network.

9. The method of claim 8, wherein downloading and storing the ESG information further comprises:

sending an ESG query from the wireless communication device to the ESG server.

10. The method of claim 9, wherein the ESG query includes a base station identifier (BSID) of a base station of the first wireless network.

11. The method of claim 8, further comprising:

receiving user input corresponding to at least one selected broadcast event of a plurality of broadcast events identified in the ESG information; and

storing event timing information for the at least one selected broadcast event, wherein the broadcast event received from the second wireless network is the at least one selected broadcast event.

12. The method as claimed in claim 1, wherein the second wireless network is a unidirectional broadcast wireless network comprised of a base station and the wireless communication device receives an Orthogonal Frequency Division Multiplex (OFDM) signal from the base station.

13. The method as claimed in claim 1, wherein the broadcast event is received from a base station of the second wireless network and comprises digitized video data in accordance with a standardized protocol.

14. A wireless communication device comprising:

a single radio frequency (RF) modem configured to;

associate the wireless communication device with a first wireless network such that the wireless communication device establishes a logical connection with the first wireless network, wherein the first wireless network is a bidirectional wireless network;

associate the wireless communication device with a second wireless network, wherein the second wireless network is a unidirectional broadcast wireless network;

attach the wireless communication device with the first wireless network and detach the wireless communication device from the first wireless network at a time prior to a start time of a broadcast event and attach the wireless communication device to the second wireless network, wherein the logical connection with the first wireless network is maintained;

a network attachment arbitrator module configured to receive, from the first wireless network via the single RF modem, information regarding the broadcast event to be received via the second wireless network; and

an application module configured to receive, via the single RF modem, the broadcast event based on the information received from the first wireless network while the logical connection with the first wireless network is maintained.

15. The wireless communication device as claimed in claim 14, wherein the broadcast event comprises a stream of data packets.

16. The wireless communication device as claimed in claim 14, wherein the network attachment arbitrator module is configured to receive time slice information associated with the broadcast event, and to control the single RF modem to detach the wireless communication device from the second wireless network based on the time slice information, and to reattach with the first wireless network based on the time slice information.

17. The wireless communication device as claimed in claim 16, wherein the network attachment arbitrator module is further configured to control the single RF modem to detach the wireless communication device from the first wireless network, attach with the second wireless network, detach with the second wireless network, and reattach with the first wireless network in an iterative manner based on the time slice information.

18. The wireless communication device as claimed in claim 16, wherein the application module is further configured to send the time slice information to the network attachment arbitrator module.

19. The wireless communication device as claimed in claim 14, wherein at least one of the first wireless network and the second wireless network is a broadband wireless network.

20. The wireless communication device of claim 14, wherein the first wireless network and the second wireless network operate over different network frequencies and the single RF modem is configured to tune to the respective wireless network frequency when attaching to a corresponding one of the first wireless network and the second wireless network.

21. The wireless communication device of claim 14, wherein the application module is further configured to download electronic service guide (ESG) information associated with the second wireless network from an ESG server while the wireless communication device is associated with the first wireless network.

22. The wireless communication device of claim 21, wherein the application module is configured to send an ESG query to the ESG server via the first wireless network, and to download the ESG information in response to the ESG query.

23. The wireless communication device of claim 22, wherein the ESG query includes a base station identifier (BSID) of a base station of the first wireless network.

24. The wireless communication device of claim 21, wherein the application module is further configured to receive user input corresponding to at least one selected broadcast event of a plurality of broadcast events identified in the ESG information, and to store event timing information for the at least one selected broadcast event, wherein the broadcast event received from the second wireless network is the at least one selected broadcast event.

25. The wireless communication device of claim 14, wherein the single RF modem is configured to receive signals from the unidirectional broadcast network using Orthogonal Frequency Division Multiplex (OFDM) modulation.

26. The wireless communication device of claim 14, wherein the single RF modem is configured to receive the broadcast event from a base station in the second wireless network and comprises digitized video data in accordance with a standardized protocol.