Satellite optimized air interface

• US 8,744,494 B2
• Filed: 06/04/2007
• Issued: 06/03/2014
• Est. Priority Date: 06/02/2006
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Jalali, Ahmad
• Primary Examiner(s): Hu, Jinsong
• Assistant Examiner(s): Shen, Qun
• Application Number:
  US11/757,852
• Publication Number:
  US 20080057863A1
• Time in Patent Office: 2,556 Days
• Field of Search: 370/316, 370320-321, 370328-329, 455/427, 455/13.2
• US Class Current: 455/457
• 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 a plurality of subscriber wireless communication devices (WCDs) by use of a shared frequency multiuser communication protocol;

applying error correction coding to the forward link, using an aggregation of communications associated with the plurality of subscriber WCDs to provide an error correction code based on the aggregation of communications;

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

receiving access probes from WCDs on an access channel in a return link;

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 at least one of wideband CDMA communication or 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.

2. The method of claim 1, comprising providing, as the dedicated frequency assignment, a narrowband discrete frequency channel.

3. The method of claim 1, comprising using an assigned narrowband frequency channel for receiving signals on the return link.

4. The method of claim 1, comprising implementing the forward link according to a time-slotted communication protocol.

5. The method of claim 1, comprising providing the access channel in the form of a CDMA access channel.

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

7. The method of claim 1, comprising receiving, as transmissions in the return link, dedicated narrowband channels for traffic and wideband CDMA communications as access probe communication.

8. The method of claim 1, comprising receiving, as transmissions in the return link, dedicated narrowband channels for traffic and narrowband access probe communication.

9. 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;

receiving a signal including an aggregate of communications in the shared communication channel and an error correction code associated with the aggregate of communications;

applying error correction to the aggregate of communications in the shared communication channel and the error correction code to check for errors in the received signal;

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

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

generating access probes in a return link;

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 at least one of wideband CDMA communication or narrowband ALOHA type communication as a return link access probe.

10. The method of claim 9, comprising selecting a narrowband channel as the discrete communication channel.

11. The method of claim 9, comprising using an assigned narrowband frequency channel for transmitting traffic signals on the return link.

12. The method of claim 9, comprising receiving the forward link according to a time-slotted communication protocol.

13. The method of claim 9, comprising providing the access probes on the return link in the form of a wideband CDMA access channel.

14. The method of claim 9, comprising providing the access probes on the return link in the form of a narrowband ALOHA type access channel.

15. The method of claim 9, comprising receiving forward signals in accordance with a CDMA communication protocol generally described by the 1xEv-DO communication standard.

16. The method of claim 9, comprising:

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

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

17. A non-transitory machine readable storage medium comprising instructions for performing the method of claim 9.

18. A processor comprising circuitry for performing the method of claim 9, comprising said processor provided as a monolithic integrated circuit.

19. A processor comprising circuitry for performing the method of claim 9, comprising said processor provided as a chipset.

20. 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 and capable of receiving a signal, in the shared communication channel, including an aggregate of communications and an error correction code associated with the aggregate of communications;

an error correction circuit capable of applying error correction to the error correction code;

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;

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

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 at least one of wideband CDMA communication or narrowband ALOHA type communication as a return link access probe.

21. The WCD of claim 20, wherein the receiver receives the forward link according to a time-slotted communication protocol.

22. The WCD of claim 20, wherein the transmitter transmits the access probes on the return link in the form of a wideband CDMA access channel.

23. The WCD of claim 20, wherein the transmitter provides the access probes on the return link in the form of a narrowband ALOHA type access channel.

24. The WCD of claim 20, wherein the receiver receives forward signals in accordance with a CDMA communication protocol generally described by the 1xEv-DO communication standard.

25. 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 error correction coding to the forward link, using an aggregation of communications associated with the plurality of subscriber WCDs to provide an error correction code based on the aggregation of communications;

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;

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

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

means for receiving, as transmissions in the return link, dedicated narrowband channels for traffic and at least one of wideband CDMA communication or narrowband ALOHA type communication as an access probe; and

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

26. 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 receiving a signal including an aggregate of communications in the shared communication channel and an error correction code associated with the aggregate of communications;

means for applying error correction to the aggregate of communications in the shared communication channel and the error correction code to check for errors in the received signal;

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;

means for generating access probes in a return link;

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

means for transmitting dedicated narrowband channels for traffic and at least one of wideband CDMA communication or narrowband ALOHA type communication as a return link access probe.