Method and apparatus for forward link rate scheduling

• US 7,751,370 B2
• Filed: 04/07/2006
• Issued: 07/06/2010
• Est. Priority Date: 07/13/2001
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Lin, Yu-Chuan, Tiedemann, Edward G. Jr., Jou, Yu-Cheun, Odenwalder, Joseph P.
• Primary Examiner(s): Pham; Chi H
• Assistant Examiner(s): HYUN, SOON D
• Application Number:
  US11/399,992
• Publication Number:
  US 20060203731A1
• Time in Patent Office: 1,551 Days
• Field of Search: None
• US Class Current: 370/335
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/22 Traffic shaping
• CPC Class Codes: H04L 47/30 in combination with information about buffer occupancy at either end or at transit nodes
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

In a communication system capable of variable rate transmission, scheduling of high speed data transmission improves utilization of the forward link and decreases the transmission delay in data communication. Each remote station is assigned one primary code channel for the duration of the communication with a cell. Secondary code channels of various types and transmission capabilities can be assigned by a channel scheduler for scheduled transmission of data traffic at high rates. Secondary code channels are assigned in accordance with a set of system goals, a list of parameters, and collected information on the status of the communication network. Secondary code channels can be grouped into sets of secondary code channels. Data is partitioned in data frames and transmitted over the primary and secondary code channels which have been assigned to the scheduled user.

Claims

1. A method for a communication system, comprising:

assigning at a controller a primary code channel to transmit unscheduled transmissions of data and control messages without a delay over a forward channel; and

assigning a secondary code channel for transmission of data at high rates over the forward channel, wherein said secondary code channel is reassigned during the scheduling period based on an available capacity of said forward link.

2. The method as recited in claim 1, further comprising:

grouping said secondary code channel into sets of secondary code channels, with each set defined by a unique grouping of secondary code channels.

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

scheduling high speed data transmissions by allocating communication resources via selecting a set of secondary code channels.

4. The method as recited in claim 2, further comprising:

wherein at least one of said unique grouping of secondary code channels corresponds to an assigned transmission rate.

5. The method as recited in claim 1, further comprising:

partitioning transmitted data into data frames and each data frame partitioned into data portions for transmission on the primary and secondary code channels.

6. The method as recited in claim 5, further comprising:

encoding and spreading said data portion into data frames of said primary and secondary code channels for transmission.

7. The method as recited in claim 1, further comprising:

determining a demand for a transmit power level of the forward link,

adding or dropping one or more secondary code channels to satisfy the demand for the transmit power level at each scheduling period.

8. The method as recited in claim 1, further comprising:

receiving said primary and secondary code channels.

9. The method as recited in claim 1, further, comprising:

scheduling said primary and secondary code channels transmissions based on an amount of data to be transmitted.

10. The method as recited in claim 1, further comprising:

scheduling transmission of small amounts of data on the primary code channel.

11. The method as recited in claim 1, further comprising:

scheduling transmission of larger amounts of data on the secondary code channel.

12. The method as recited in claim 1, further comprising:

scheduling high data rate transmission on the secondary code channel.

13. The method as recited in claim 1, further comprising:

scheduling said primary and secondary code channels transmissions based on at least one a transmit energy-per-bit required by a user for a requisite level of performance, an amount of data to be transmitted, a type of data to be transmitted, a type of data service being provided to the user, an amount of delay already experienced by the user, and priority of the users.

14. An apparatus for a communication system, comprising:

a transmitter for transmitting data over a primary and secondary code channels over a forward link;

a controller for assigning a primary code channel to transmit unscheduled transmissions of data and control messages without a delay over the forward link, for assigning a secondary code channel for transmission of data at high rates over the forward channel, wherein said secondary code channel is reassigned during the scheduling period based on an available capacity of said forward link.

15. The apparatus as recited in claim 14, wherein said controller is for grouping said least one secondary code channel into sets of secondary code channels, with each set defined by a unique grouping of secondary code channels.

16. The apparatus as recited in claim 14, wherein said controller is for scheduling high speed data transmissions by allocating communication resources via selecting a set of secondary code channels.

17. The apparatus as recited in claim 15 wherein at least one of said unique grouping of secondary code channels corresponds to an assigned transmission rate.

18. The apparatus as recited in claim 14, wherein said controller is for partitioning transmitted data into data frames and each data frame partitioned into data portions for transmission on the primary and secondary code channels.

19. The apparatus as recited in claim 18, wherein said transmitter is for encoding and spreading said data portion into data frames of said primary and secondary code channels for transmission.

20. The apparatus as recited in claim 14, wherein said controller is for determining a demand for a transmit power level of the forward link, and adding or dropping one or more secondary code channels to satisfy the demand for the transmit power level at each scheduling period.

21. The apparatus as recited in claim 14, further comprising:

a receiver for receiving said primary and secondary code channels.

22. The apparatus as recited in claim 14, wherein said controller is for scheduling said primary and secondary code channels transmissions based on an amount of data to be transmitted.

23. The apparatus as recited in claim 14, wherein said controller is for scheduling transmission of small amounts of data on the primary code channel.

24. The apparatus as recited in claim 14, wherein said controller is for scheduling transmission of larger amounts of data on the secondary code channel.

25. The apparatus as recited in claim 14, wherein said controller is for scheduling high data rate transmission on the secondary code channel.

26. The apparatus as recited in claim 14, wherein said controller is for scheduling said primary and secondary code channels transmissions based on at least one a transmit energy-per-bit required by a user for a requisite level of performance, an amount of data to be transmitted, a type of data to be transmitted, a type of data service being provided to the user, an amount of delay already experienced by the user, and priority of the users.

27. An apparatus for communication system, comprising:

means for assigning a primary code channel to transmit unscheduled transmissions of data and control messages without a delay over a forward channel; and

means for assigning a secondary code channel for transmission of data at high rates over the forward channel, wherein said secondary code channel is reassigned during the scheduling period based on an available capacity of said forward link.