Apparatus and method for channel coding and multiplexing in CDMA communication system

• US 7,386,001 B1
• Filed: 06/26/2000
• Issued: 06/10/2008
• Est. Priority Date: 06/25/1999
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Kim, Min-Goo, Lee, Young-Hwan, Choi, Soon-Jae, Kim, Beong-Jo, Kim, Se-Hyoung
• Primary Examiner(s): Pezzlo; John
• Application Number:
  US09/603,062
• Time in Patent Office: 2,906 Days
• Field of Search: 370/342, 370/441, 370/535, 370/537, 370/538, 370/542, 370/543, 370/320, 370/335, 370/540, 370/477, 370/468, 370/479, 370/280, 370/336, 370/337, 370/347, 370/442, 370/528, 370/355, 711/157, 704/230, 375/240.26
• US Class Current: 370/442
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04L 1/0017 where the mode-switching is based on Quality of Service requirement
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0068 by puncturing
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/0083 Formatting with frames or packets; Protocol or part of protocol for error control
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 25/14 Channel dividing arrangements , i.e. in which a single bit stream is divided between several baseband channels and reassembled at the receiver

Abstract

A channel coding and multiplexing apparatus and method in a CDMA communication system is disclosed. In the channel coding and multiplexing apparatus, each of a number of radio frame matchers (equal in number or greater than the number of transport channels) has a radio frame segmenter and segments each of transport channel frames that may have different transmission time intervals to radio frames. A multiplexer multiplexes the radio frames to form a serial data frame.

Claims

1. A channel coding and multiplexing apparatus for a CDMA communication system, in which data frames that have different transmission time intervals (TTIs) are received in parallel via a plurality of transport channels and multiplexed to a serial data frame, the apparatus comprising:

a number of radio frame matchers, the number of radio frame matchers being at least equal to the number of the transport channels, each radio frame matcher having a radio frame segmenter for receiving the data frames and segmenting the data frames into radio frames; and

a multiplexer for multiplexing the radio frames to the serial data frame,

wherein each radio frame segmenter determines the bit number of a radio frame according to the size of the data frames received by the corresponding frame matcher and the TTI of a radio frame and divides the data frames by the bit number of the radio frame.

2. The channel coding and multiplexing apparatus of claim 1, wherein each radio frame matcher further includes an interleaver for interleaving the data frames received by the corresponding frame matcher and applying the interleaved data to a corresponding radio frame segmenter.

3. The channel coding and multiplexing apparatus of claim 1, wherein each radio frame matcher further includes a rate matcher for adjusting the data rate of a radio frame received from a radio frame segmenter by one of puncturing and repeating parts of the radio frame to match the data rate of the radio frame to that of a physical channel frame.

4. The channel coding and multiplexing apparatus of claim 1, wherein the radio frame matchers are connected between channel coders and the multiplexer in an uplink frame transmitting device, and each of the radio frame matchers of the uplink channel transmitting device comprises:

an interleaver for interleaving the data frames received by the corresponding frame matcher;

a radio frame segmenter for determining the bit number of a radio frame according to the size of the data frames received by the corresponding frame matcher and a radio frame TTI and dividing the data frames by a variable, said variable being a function of the radio frame TTI; and

a rate matcher for adjusting the data rate of a radio frame received from the radio frame segmenter by one of puncturing and repeating parts of the radio frame to match the data rate of the radio frame to that of a physical channel frame.

5. The channel coding and multiplexing apparatus of claim 1, wherein the radio frame matchers are connected between channel coders and a multiplexer in a downlink channel transmitting device, and each of the radio frame matchers of the downlink channel transmitting device comprises:

an interleaver for interleaving the data frames received by the corresponding frame matcher;

a radio frame segmenter for determining the bit number of a radio frame according to the size of the data frames received by the corresponding frame matcher and a radio frame TTI and dividing the data frame by a variable, said variable being a function of the radio frame TTI.

6. A channel coding and multiplexing apparatus for a CDMA communication system, in which data frames that have one or more transmission time intervals (TTIs) are received in parallel via a plurality of transport channels and converted to data frames of multi-code physical channels, the apparatus comprising:

a number of radio frame matchers, each radio frame matcher having a radio frame segmenter for segmenting the data frames into radio frames;

a multiplexer for multiplexing the radio frames into a serial data frame; and

a physical channel segmenter adapted to segment the serial data frame by the number of the physical channels and outputting the segmented physical channel frames to corresponding physical channels,

wherein the segmented physical channel frames for a physical channel #1 are output as e_1,j=d_j, the segmented physical channel frames for a physical channel #2 are output as e_2,j=d_(j+P/M) and the segmented physical channel frames for a physical channel #M are output as e_M,j=d<sub>(j+(M−

1)P/M</sub>, and wherein the bits of the serial data frame output from the multiplexer are d₁, d₂, . . . , d_p, the number of physical channels is M, the size of the serial data frame output from the multiplexer is P and j=1, 2, . . . , P/M.

7. A channel coding and multiplexing apparatus for a CDMA communication system, in which data frames that have one or more transmission time intervals (TTIs) are received in parallel via a plurality of transport channels and multiplexed to a serial data frame, the apparatus comprising:

a number of radio frame matchers, each of the radio frame matchers adapted to determine a number of filler bits and inserting the determined number of filler bits into the data frames, and each of the radio frame matchers having a radio frame segmenter for segmenting the data frames having the inserted number of filler bits into radio frames; and

a multiplexer for multiplexing the radio frames into the serial data frame.

8. The channel coding and multiplexing apparatus of claim 7, wherein each radio frame segmenter determines the bit number of the radio frames according to the size of the corresponding data frame, a radio frame TTI, and the number of filler bits, and divides the corresponding data frame by the bit number of the radio frames.

9. The channel coding and multiplexing apparatus of claim 7, wherein each radio frame matcher further includes an interleaver for interleaving the data frames received by the corresponding frame matcher and applying the interleaved data frames to a corresponding radio frame segmenter.

10. The channel coding and multiplexing apparatus of claim 7, wherein each radio frame matcher further includes a rate matcher for adjusting the data rate of a radio frame received from a radio frame segmenter by one of puncturing and repeating parts of the radio frame to match the data rate of the radio frame to that of a physical channel frame.

17. The channel coding and multiplexing apparatus of claim 7, wherein one filler bit is added to the end of each radio frame having frame time index t>

=T_i−

r_i+1 where r_i indicates the number of filler bits and T_i indicates a TTI.

11. A channel coding and multiplexing apparatus for a CDMA communication system, in which data frames that have one or more transmission time intervals (TTIs) are received in parallel via a plurality of transport channels and converted to data frames of multi-code physical channels, the apparatus comprising:

a number of radio frame matchers, each of the radio frame matchers determining a number of filler bits and inserting the determined number of filler bits into the data frames and each of the radio frame matchers having a radio frame segmenter for segmenting the data frames having the inserted number of filler bits into radio frames;

a multiplexer for multiplexing the radio frames into a serial data frame; and

a physical channel segmenter for segmenting the multiplexed serial data frame by the number of the physical channels and outputting the segmented physical channel frames to corresponding physical channels.

18. The channel coding and multiplexing apparatus of claim 11, wherein one filler bit is added to the end of each radio frame having frame time index t>

=T_i−

r_i+1 where r_i indicates the number of filler bits and T_i indicates a TTI.

12. A channel coding and multiplexing method for a CDMA communication system in which data frames that have one or more transmission time intervals (TTIs) are received in parallel via a plurality of transport channels and multiplexed into a serial data frame, the method comprising:

receiving data frames;

determining a number of filler bits;

inserting the number of filler bits into the data frames;

segmenting the data frames including the filler bits into radio frames in a number of radio frame matchers; and

multiplexing the radio frames into the serial data frame.

13. The channel coding and multiplexing method of claim 12, further comprising:

segmenting the serial data frame by the number of the physical channels; and

assigning the segmented physical channel frames to the corresponding physical channels.

19. The channel coding and multiplexing apparatus of claim 12, wherein one filler bit is added to the end of each radio frame having frame time index t>

=T_i−

r_i+1 where r_i indicates the number of filler bits and T_i indicates a TTI.

14. A channel coding and multiplexing apparatus for a CDMA communication system, in which data frames that have one or more transmission time intervals (TTIs) are received in parallel via a plurality of transport channels and multiplexed into a serial data frame, the apparatus comprising:

a plurality of radio frame matchers, each of the radio frame matchers adapted to determine a number of filler bits and to insert the determined number of the filler bits into the data frames and, each of the radio frame matchers comprising a radio frame segmenter for segmenting the data frames having the inserted number of filler bits into radio frames; and

a multiplexer for multiplexing the radio frames into a serial data frame,

wherein the number of filler bits is determined such that the filler bit inserted data frames can be segmented into equally sized radio frames.

20. The channel coding and multiplexing apparatus of claim 14, wherein one filler bit is added to the end of each radio frame having frame time index t>

=T_i−

r_i+1 where r_i indicates the number of filler bits and T_i indicates a TTI.

15. A channel coding and multiplexing method for a CDMA communication system in which data frames that have one or more transmission time intervals (TTIs) are received in parallel via a plurality of transport channels and multiplexed into a serial data frame, the method comprising:

receiving data frames;

determining a number of filler bits;

inserting the number filler bits into the data frames;

segmenting the data frames including the filler bits into radio frames in a number of radio frame matchers; and

multiplexing the radio frames into the serial data frame,

wherein the number of filler bits is determined such that the filler bit inserted data frames can be segmented into equally sized radio frames.

21. The channel coding and multiplexing apparatus of claim 15, wherein one filler bit is added to the end of each radio frame having frame time index t>

=T_i−

r_i+1 where r_i indicates the number of filler bits and T_i indicates a TTI.

16. A channel coding and multiplexing method for a CDMA communication system, in which data frames that have one or more transmission time intervals (TTIs) are received in parallel via a plurality of transport channels and converted to data frames of multi-code physical channels, the method comprising:

segmenting the received data frames into radio frames in a number of radio frame matchers;

multiplexing the radio frames into a serial data frame; and

segmenting the serial data frame by the number of the physical channels and outputting the segmented physical channel frames to corresponding physical channels,

wherein the segmented physical channel frames for physical channel #1 are output as e_1j=d_j, the segmented physical channel frames for physical channel #2 are output as e_2j=d_(j+P/M) and the segmented physical channel frames for physical channel #M are output as e_Mj=d<sub>d(j+(M−

1)P/M)</sub>, and wherein the bits of the serial data frame output from the multiplexer are d₁, d₂, . . . , d_p, the number o physical channels is M, the size of the serial data frame output from the multiplexing step is P and j=1,2, . . . , P/M.