Time-orthogonal CDMA wireless communication system

• US 20040100921A1
• Filed: 11/27/2002
• Published: 05/27/2004
• Est. Priority Date: 11/27/2002
• Status: Abandoned Application

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Khan, Farooq Ullah
• Application Number:
  US10/305,172
• Publication Number:
  US 20040100921A1
• Time in Patent Office: Days
• US Class Current: 370/321
• CPC Class Codes: H04W 52/262 taking into account adaptive modulation and coding [AMC] scheme AMC per se H04L1/0001
• CPC Class Codes: H04W 52/286 during data packet transmission, e.g. high speed packet access [HSPA]

Abstract

The system provides a slot-synchronized reverse link and transmission scheme where high-speed data transmissions are made possible by carrying the high-speed data transmission in slots orthogonal to the slots carrying control, voice and other low rate data transmission.

Claims

1. A method of transmitting information over a reverse link by a mobile, comprising:

transmitting at a higher power than that established by a power control algorithm during a burst slot of a reverse link channel.

2. The method of claim 1, wherein the transmitting step transmits at the higher power level in response to a schedule grant message.

3. The method of claim 2, further comprising:

receiving the schedule grant message, the schedule grant message including at least one mobile identifier; and

wherein

the transmitting step transmits at the higher power when the mobile identifier in the schedule grant message matches a mobile identifier of the mobile.

4. The method of claim 3, further comprising:

performing no transmission when the schedule grant message does not include a mobile identifier of the mobile.

5. The method of claim 3, further comprising:

generating an encoder packet in response to the received schedule grant message when the mobile identifier in the schedule grant message matches a mobile identifier of the mobile; and

wherein

the transmitting step transmits the encoder packet.

6. The method of claim 3, wherein

the schedule grant message includes a data rate;

and

the transmitting step transmits at the data rate.

7. The method of claim 3, wherein

the schedule grant message includes a power level;

and

the transmitting step transmits at the power level.

8. The method of claim 3, wherein

the schedule grant message includes a slot indicator associated with the mobile identifier identifying a burst slot on the reverse link channel;

and

the transmitting step transmits at the higher power level during the identified burst slot when the mobile identifier in the schedule grant message matches a mobile identifier of the mobile.

9. The method of claim 2, wherein the schedule grant message includes a power level;

and

the transmitting step transmits at the power level.

10. The method of claim 2, wherein

the schedule grant message includes a slot indicator identifying a burst slot on the reverse link channel;

and

the transmitting step transmits at the higher power level during the identified burst slot.

11. The method of claim 1, wherein the higher power is a peak power of the mobile scheduled to transmit during the burst slot.

12. The method of claim 1, wherein the higher power is a fraction of the peak power of the mobile scheduled to transmit during the burst slot.

13. The method of claim 1, further comprising:

generating at least one encoder packet in response to a received schedule grant message; and

wherein

the transmitting step transmits at least a portion of the encoder packet.

14. The method of claim 13, wherein the transmitting step transmits one encoder packet over a single burst slot.

15. The method of claim 13, wherein the transmitting step transmits one encoder packet over more than one burst slot.

16. The method of claim 1, further comprising:

transmitting at a power established according to a power control algorithm during power control slots of the reverse link channel.

17. The method of claim 16, wherein the power control slots are time orthogonal to the burst slots.

18. A method of transmitting information over a reverse link by a mobile, comprising:

transmitting at a power level during a burst slot of a reverse link channel regardless of a RoT threshold.

19. A method of controlling transmission over reverse links by mobiles, comprising:

transmitting a schedule grant message on a forward link channel, the schedule grant message identifying at least one mobile to transmit at a higher power level than that established by a power control algorithm during a burst slot of a reverse link channel.

20. The method of claim 19, wherein the schedule grant message includes at least one mobile identifier identifying the mobile.

21. The method of claim 19, wherein the schedule grant message includes a data rate indicator indicating a data rate at which the mobile is to transmit during the burst slot.

22. The method of claim 19, wherein the schedule grant message includes a power level indicator indicating a power level at which the mobile is to transmit during the burst slot.

23. The method of claim 19, wherein the schedule grant message includes a slot identifier identifig the burst slot in the reverse link channel over which the mobile is to transmit.

24. The method of claim 19, wherein the schedule grant message identifies more than one mobile to transmit at a high power level, and identifies different burst slots of the reverse link channel over which each mobile is to transmit.

25. The method of claim 19, further comprising:

scheduling which slots of the reverse link channel will be burst slots; and

wherein

the transmitting step transmits one or more schedule grant messages based on the scheduling.

26. The method of claim 25, wherein the scheduling step schedules every other slot of the reverse link channel as a burst slot.

27. The method of claim 25, wherein the scheduling step schedules two consecutive burst slots for each two consecutive non-burst slots.

28. The method of claim 25, wherein the scheduling step schedule three consecutive burst slots for each non-burst slot.

29. The method of claim 25, wherein the scheduling step schedules which mobile will transmit during which burst slot.

30. The method of claim 25, further comprising:

adjusting a threshold of the power control algorithm such that at least one mobile unable to operate according to the schedule grant message increases transmission power during non-burst slots of the reverse link channel.

31. The method of claim 19, further comprising:

receiving an overall signal;

detecting a burst transmission signal in the overall signal; and

performing interference cancellation on the overall signal using the detected burst transmission signal.

32. A method of controlling transmission over reverse links by mobiles, comprising:

transmitting a schedule grant message on a forward link channel, the schedule grant message identifying at least one mobile to transmit during a burst slot of a reverse link channel regardless of a RoT threshold.