SATELLITE OPTIMIZED AIR INTERFACE

• US 20080057863A1
• Filed: 06/04/2007
• Published: 03/06/2008
• Est. Priority Date: 06/02/2006
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Jalali, Ahmad
• Granted Patent: US 8,744,494 B2
• Time in Patent Office: Days
• US Class Current: 455/13.2
• CPC Class Codes: H04B 7/18563 Arrangements for interconnecting multiple systems data switching networks H04L12/00
• CPC Class Codes: H04B 7/216 Code division or spread-spectrum multiple access [CDMA, SSMA]

Abstract

A method is disclosed for establishing communication links in a satellite based wireless communication system. The method includes: establishing a forward link from the satellite to at least one of a plurality of subscriber wireless communication devices (WCDs) by use of a shared frequency multi-user communication protocol; applying an error correction code to use in the forward link, whereby the error correction applies to an aggregation of communications provided to multiple ones of the WCDs; and receiving communications in a return: link signal by use of a protocol providing channels having dedicated frequency assignments and non-slotted channel assignment.

Claims

1. In a satellite based wireless communication system, a method for establishing communication links comprising:

establishing a forward link from the satellite to at least one of a plurality of subscriber wireless communication devices (WCDs) by use of a shared frequency multiuser communication protocol;

applying an error correction code to use in the forward link, whereby the error correction applies to an aggregation of communications provided to multiple ones of the WCDs; and

receiving communications in a return link signal by use of a protocol providing channels having dedicated frequency assignments and non-slotted channel assignments.

2. The method of claim 1, comprising receiving access probes from WCDs on an access channel in a return link.

3. The method of claim 2, comprising providing, as the dedicated frequency assignment, a narrowband discrete frequency channel.

4. The method of claim 2, comprising using an assigned narrowband frequency channel for receiving signals on the return link.

5. The method of claim 2, comprising implementing the forward link according to a time-slotted communication protocol.

6. The method of claim 2, comprising providing the access channel in the form of a CDMA access channel.

7. The method of claim 2, comprising transmitting forward signals in accordance with a CDMA communication protocol generally described by the 1xEv-DO communication standard.

8. The method of claim 2, comprising receiving, as transmissions in the return link, dedicated narrowband channels for traffic and wideband CDMA communications as access probe communication.

9. The method of claim 2, comprising receiving, as transmissions in the return link, dedicated narrowband channels for traffic and narrowband access probe communication.

10. The method of claim 2, comprising:

transmitting forward signals in accordance with a CDMA communication protocol generally described by the 1xEv-DO communication standard;

receiving, as transmissions in the return link, dedicated narrowband channels for traffic and wideband CDMA communication as an access probe; and

providing, as transmissions in the forward link, a slotted scheme whereby multiple user data are multiplexed and sent on a wide bandwidth.

11. The method of claim 2, comprising:

transmitting forward signals in accordance with a CDMA communication protocol generally described by the 1xEv-DO communication standard;

receiving, as transmissions in the return link, dedicated narrowband channels for traffic and narrowband ALOHA type communication as an access probe; and

providing, as transmissions in the forward link, a slotted scheme whereby multiple user data are multiplexed and sent on a wide bandwidth.

12. A method for using a wireless communication device (WCD) to communicate with a satellite, the method comprising:

establishing a forward link from a received transmission in a shared communication channel;

applying error correction to an aggregate of communications in the shared communication channel with an error correction code;

parsing an assigned logical communication channel from the shared communication channel as a forward link communication; and

establishing a further return communication link in a discrete communication channel.

13. The method of claim 12, comprising generating access probes in a return link.

14. The method of claim 13, comprising selecting a narrowband channel as the discrete communication channel.

15. The method of claim 13, comprising using an assigned narrowband frequency channel for transmitting traffic signals on the return link.

16. The method of claim 13, comprising receiving the forward link according to a time-slotted communication protocol.

17. The method of claim 13, comprising providing the access probes on the return link in the form of a wideband CDMA access channel.

18. The method of claim 13, comprising providing the access probes on the return link in the form of a narrowband ALOHA type access channel.

19. The method of claim 13, comprising receiving forward signals in accordance with a CDMA communication protocol generally described by the 1xEv-DO communication standard.

20. The method of claim 13, comprising:

providing return link transmissions, in dedicated narrowband channels for traffic; and

providing wideband CDMA access probe communication in the return link transmission.

21. The method of claim 13, comprising:

receiving communications in accordance with a CDMA communication protocol generally described by the 1xEv-DO communication standard; and

transmitting dedicated narrowband channels for traffic and wideband CDMA communication as a return link access probe.

22. The method of claim 13, comprising:

receiving communications in accordance with a CDMA communication protocol generally described by the 1xEv-DO communication standard; and

transmitting dedicated narrowband channels for traffic and narrowband ALOHA type communication as a return link access probe.

23. A machine readable medium comprising instructions for performing the method of claim 13.

24. A processor comprising circuitry for performing the method of claim 13, comprising said processor provided as a monolithic integrated circuit.

25. A processor comprising circuitry for performing the method of claim 13, comprising said processor provided as a chipset.

26. A wireless communication device (WCD) capable of communicating with a satellite, the WCD comprising:

a receiver capable of establishing a forward link from a received transmission in a shared communication channel;

an error correction circuit capable of applying error correction code to an aggregate of communications in the shared communication channel;

a logic circuit capable of parsing an assigned logical communication channel from the shared communication channel as a forward link communication;

a transmitter capable of establishing a return communication link in a discrete communication channel; and

a circuit, capable of generating access probes in a return link in association with the received communication.

27. The WCD of claim 26, wherein the receiver receives the forward link according to a time-slotted communication protocol.

28. The WCD of claim 26, wherein the transmitter transmits the access probes on the return link in the form of a wideband CDMA access channel.

29. The WCD of claim 26, wherein the transmitter provides the access probes on the return link in the form of a narrowband ALOHA type access channel.

30. The WCD of claim 26, wherein the receiver receives forward signals in accordance with a CDMA communication protocol generally described by the 1xEv-DO communication standard.

31. The WCD of claim 26, wherein:

the receiver receives communications in accordance with a CDMA communication protocol generally described by the 1xEv-DO communication standard; and

the transmitter transmits dedicated narrowband channels for traffic and wideband CDMA communication as a return link access probe.

32. The WCD of claim 26, comprising:

the receiver receives communications in accordance with a CDMA communication protocol generally described by the 1xEv-DO communication standard; and

the transmitter transmits dedicated narrowband channels for traffic and narrowband ALOHA type communication as a return link access probe.

33. In a satellite based wireless communication system, a system for establishing communication links comprising:

means for establishing a forward link from the satellite to at least one of a plurality of subscriber wireless communication devices (WCDs) by use of a shared frequency multiuser communication protocol;

means for applying an error correction code to use in the forward link, whereby the error correction applies to an aggregation of communications provided to multiple ones of the WCDs;

means for receiving communications in a return link signal by use of a protocol providing channels having dedicated frequency assignments and non-slotted channel assignments; and

means for receiving access probes from WCDs on an access channel in a return link.

34. A system for using a wireless communication device (WCD) to communicate with a satellite, the system comprising:

means for establishing a forward link from a received transmission in a shared communication channel;

means for applying error correction to an aggregate of communications in the shared communication channel with an error correction code;

means for parsing an assigned logical communication channel from the shared communication channel as a forward link communication;

means for establishing a further return communication link in a discrete communication channel; and

means for generating access probes in a return link.