Dynamic channelization code allocation

• US 20030224798A1
• Filed: 01/15/2003
• Published: 12/04/2003
• Est. Priority Date: 05/31/2002
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Tiedemann, Edward G. Jr., Chen, Tao, Willenegger, Serge
• Granted Patent: US 8,699,505 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04B 2201/70703 using multiple or variable rates
• CPC Class Codes: H04J 13/004 Orthogonal
• CPC Class Codes: H04J 13/18 Allocation of orthogonal codes
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code

Abstract

Techniques for efficient allocation of channelization codes are disclosed. In one aspect, a dedicated data channel is partitioned into a primary channel and a secondary channel. The rate of the primary channel is a relatively low fixed rate. The rate of the secondary channel varies over time in accordance with the rate of the dedicated channel data. In another aspect, a channelization code indicator is transmitted in the primary channel to identify the secondary channel. In yet another aspect, more than one secondary channel may be deployed. Various other aspects are also presented. These aspects have the benefit of efficient code resource allocation, resulting in increased support for users/and or channels, as well as increased system capacity.

Claims

1. An apparatus, comprising:

a channel mapper for;

receiving a variable rate data frame;

apportioning the variable rate data frame into a primary data block and one or more secondary data blocks, the primary data block sized for transmission at a fixed rate, the one or more secondary data blocks comprising the remainder of the variable rate data frame;

determining one or more secondary rates in accordance with the one or more secondary data blocks;

forming a primary data frame comprising the primary data block and an indicator identifying a code associated with at least one of the secondary rates; and

forming one or more secondary data frames comprising the one or more secondary blocks;

respectively.

2. The apparatus of claim 1, further comprising a transmitter for:

transmitting the primary data frame on a primary channel with a dedicated code associated with the fixed rate; and

transmitting the one or more secondary data frames on one or more secondary channels with codes associated with the one or more secondary rates, respectively.

3. An apparatus, comprising:

a receiver for receiving a first fixed rate channel comprising a variable code indicator and for receiving a second variable rate channel according to the variable secondary code indicator.

4. The apparatus of claim 3, wherein the receiver further combines a frame of data from the first fixed rate channel with a frame of data from the second variable rate channel to form a variable rate data frame.

5. An apparatus, comprising:

a control processor for partitioning a variable rate data stream into a fixed rate data stream and a variable rate data stream, each frame of the fixed rate data stream comprising a first portion of a frame of the variable rate data stream and an indicator identifying a code associated with a corresponding second portion of the variable rate data frame, and the variable rate data stream comprising the respective second portions of the variable rate data frames.

6. A wireless communication system, comprising:

a channel mapper for;

receiving a variable rate data frame;

apportioning the variable rate data frame into a primary data block and one or more secondary data blocks, the primary data block sized for transmission at a fixed rate, the one or more secondary data blocks comprising the remainder of the variable rate data frame;

determining one or more secondary rates in accordance with the one or more secondary data blocks;

forming a primary data frame comprising the primary data block and an indicator identifying a code associated with at least one of the secondary rates; and

forming one or more secondary data frames comprising the one or more secondary blocks;

respectively.

7. A wireless communication system, comprising:

a receiver for receiving a first fixed rate channel comprising a variable code indicator and for receiving a second variable rate channel according to the variable secondary code indicator.

8. A method for transmitting a variable rate data frame, comprising:

apportioning the variable rate data frame into a primary data block and one or more secondary data blocks, the primary data block sized for transmission at a fixed rate, the one or more secondary data blocks comprising the remainder of the variable rate data frame;

determining one or more secondary rates in accordance with the one or more secondary data blocks;

forming a primary data frame comprising the primary data block and an indicator identifying a code associated with at least one of the secondary rates; and

forming one or more secondary data frames comprising the one or more secondary blocks, respectively.

9. The method of claim 8, further comprising:

transmitting the primary data frame on a primary channel with a dedicated code associated with the fixed rate; and

transmitting the one or more secondary data frames on one or more secondary channels with codes associated with the one or more secondary rates, respectively.

10. A method for receiving a variable rate signal, comprising:

receiving a first fixed rate channel comprising a variable code indicator; and

receiving a second variable rate channel according to the variable secondary code indicator.

11. The method of claim 10, further comprising combining a frame of data from the first fixed rate channel with a frame of data from the second variable rate channel to form a variable rate data frame.

12. A method for generating primary and secondary data streams, comprising:

partitioning a variable rate data stream into a fixed rate data stream and a variable rate data stream, each frame of the fixed rate data stream comprising a first portion of a frame of the variable rate data stream and an indicator identifying a code associated with a corresponding second portion of the variable rate data frame, the variable rate data stream comprising the respective second portions of the variable rate data frames.

13. A method for transmitting a variable rate signal comprising a plurality of frames, the rate of each frame corresponding to one of a plurality of supported rates, the method comprising:

identifying a first portion of a frame suitable for transmission at the lowest supported rate, the first portion being the entire frame when the frame rate is the lowest supported rate;

transmitting the first portion of the frame on a first channel with a fixed code, the rate of the fixed code being the lowest supported rate;

determining a second code such that the rate of the second code is sufficient to transmit a second portion of the frame when the frame rate is greater than the lowest supported rate;

transmitting a code indicator on the first channel, the code indicator identifying the second code when the frame rate is greater than the lowest supported rate and indicating no second code when the frame rate is equal to the lowest supported rate; and

transmitting the second portion of the frame on a second channel in accordance with the second code when the frame rate is greater than the lowest supported rate.

14. The method of claim 13, wherein the second portion of the frame is the remainder of the frame without the first portion.

15. The method of claim 13, further comprising:

identifying one or more third portions of the frame, the one or more third portions comprising the remainder of the frame without the first and second portions;

determining one or more third codes, the rates of which are suitable for transmission of the one or more third portions of the frame, respectively;

transmitting the one or more third portions of the frame on one or more third channels in accordance with the one or more third codes, respectively; and

transmitting a second code indicator on the second channel, the second code indicator identifying one or more of the third codes.

16. The method of claim 15, further comprising transmitting a third code indicator identifying one or more of the third codes on one or more of the third channels.

17. A method for receiving a variable rate signal comprising a plurality of frames, the rate of each frame corresponding to one of a plurality of supported rates, the method comprising:

receiving a first portion of the frame on a first channel with a fixed first code, the rate of the first fixed code being the lowest supported rate;

decoding a code indicator from the received first portion of the frame, the code indicator identifying a second code when the frame rate is greater than the lowest supported rate and indicating the received first portion of the frame is the entire frame when the frame rate is the lowest supported rate; and

receiving a second portion of the frame on a second channel in accordance with the second code when the code indicator identifies a second code.

18. The method of claim 17 further comprising:

decoding a second code indicator from the received second portion of the frame, the second code indicator identifying one or more third codes; and

receiving one or more third portions of the frame on one or more third channels in accordance with the one or more third codes, respectively.

19. An apparatus, comprising:

means for apportioning a variable rate data frame into a primary data block and one or more secondary data blocks, the primary data block sized for transmission at a fixed rate, the one or more secondary data blocks comprising the remainder of the variable rate data frame;

means for determining one or more secondary rates in accordance with the one or more secondary data blocks;

means for forming a primary data frame comprising the primary data block and an indicator identifying a code associated with at least one of the secondary rates; and

means for forming one or more secondary data frames comprising the one or more secondary blocks, respectively.

20. An apparatus, comprising:

means for receiving a first fixed rate channel comprising a variable code indicator; and

means for receiving a second variable rate channel according to the variable secondary code indicator.

21. An apparatus, comprising:

means for partitioning a variable rate data stream into a fixed rate data stream and a variable rate data stream, each frame of the fixed rate data stream comprising a first portion of a frame of the variable rate data stream and an indicator identifying a code associated with a corresponding second portion of the variable rate data frame, the variable rate data stream comprising the respective second portions of the variable rate data frames.

22. A wireless communication system, comprising:

means for apportioning a variable rate data frame into a primary data block and one or more secondary data blocks, the primary data block sized for transmission at a fixed rate, the one or more secondary data blocks comprising the remainder of the variable rate data frame;

means for determining one or more secondary rates in accordance with the one or more secondary data blocks;

means for forming a primary data frame comprising the primary data block and an indicator identifying a code associated with at least one of the secondary rates; and

means for forming one or more secondary data frames comprising the one or more secondary blocks, respectively.

23. A wireless communication system, comprising:

means for receiving a first fixed rate channel comprising a variable code indicator; and

means for receiving a second variable rate channel according to the variable secondary code indicator.

24. A wireless communication system, comprising:

means for partitioning a variable rate data stream into a fixed rate data stream and a variable rate data stream, each frame of the fixed rate data stream comprising a first portion of a frame of the variable rate data stream and an indicator identifying a code associated with a corresponding second portion of the variable rate data frame, the variable rate data stream comprising the respective second portions of the variable rate data frames.

25. Processor readable media operable to perform the following steps:

apportioning a variable rate data frame into a primary data block and one or more secondary data blocks, the primary data block sized for transmission at a fixed rate, the one or more secondary data blocks comprising the remainder of the variable rate data frame;

determining one or more secondary rates in accordance with the one or more secondary data blocks;

forming a primary data frame comprising the primary data block and an indicator identifying a code associated with at least one of the secondary rates; and

forming one or more secondary data frames comprising the one or more secondary blocks, respectively.

26. Processor readable media operable to perform the following steps:

receiving a first fixed rate channel comprising a variable code indicator; and

receiving a second variable rate channel according to the variable secondary code indicator.

27. Processor readable media operable to perform the following steps:

partitioning a variable rate data stream into a fixed rate data stream and a variable rate data stream, each frame of the fixed rate data stream comprising a first portion of a frame of the variable rate data stream and an indicator identifying a code associated with a corresponding second portion of the variable rate data frame, the variable rate data stream comprising the respective second portions of the variable rate data frames.