Apparatus and method for transmitting reverse packet data in mobile communication system

• US 7,342,882 B2
• Filed: 06/05/2007
• Issued: 03/11/2008
• Est. Priority Date: 07/01/2003
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Han, Jin-Kyu, Kim, Youn-Sun, Kwon, Hwan-Joon, Kim, Dong-hee
• Primary Examiner(s): Feild; Joseph
• Assistant Examiner(s): MEHRA, INDER P
• Application Number:
  US11/758,561
• Publication Number:
  US 20070230430A1
• Time in Patent Office: 280 Days
• Field of Search: 370/232, 370/310, 370/329, 370/342, 370/352, 455/67.11, 455/522, 710/105
• US Class Current: 370/232
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1858 Transmission or retransmission of more than one copy of acknowledgement message
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]
• CPC Class Codes: H04W 52/286 during data packet transmission, e.g. high speed packet access [HSPA]
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels

Abstract

In an apparatus for controlling reply signal transmission in a reply signal transmitter that generates and transmits a reply signal according to an error check in packet data received through a radio channel in a mobile communication system, an error detection part generates a reply signal corresponding to the error check from the packet data received through the radio channel. A spreading part spreads the reply signal to output the spread reply signal. A transmission power control part carries out a power control operation for the spread reply signal with a power value that differs according to a packet data transmission rate of a packet data channel. A transmission part transmits the reply signal outputted by the transmission power control part through a radio channel.

Claims

1. An apparatus for transmitting a rate control bit (RCB) in a mobile communication system, comprising:

an RCB generation part for generating the RCB at a data transmission rate determined under the control of a scheduler; and

a transmission power control part for controlling the power for the generated RCB with a power value that differs according to a packet data transmission rate and outputting a result of the power control operation.

2. The apparatus of claim 1, further comprising:

an RCB transmission part for transmitting through a radio channel the RCB output from the transmission power control part.

3. An apparatus for transmitting a rate control bit (RCB) in a mobile communication system, comprising:

an RCB generation part for generating the RCB according to a data transmission rate determined under a control of a scheduler;

a symbol repetition control part for outputting a repetition control signal with a value that differs according to the data transmission rate;

a symbol repetition part for repeating the RCB according to the repetition control signal; and

a spreading part for spreading the repeated RCB and outputting the spread RCB.

4. The apparatus of claim 3, further comprising:

an RCB transmission part for transmitting the spread RCB through a radio channel.

5. The apparatus of claim 4, wherein the power of RCB is increase when the packet data transmission rate is increase.

6. The apparatus of claim 4, wherein the power of RCB is decrease when the packet data transmission rate is decrease.

7. An apparatus for receiving a rate control bit (RCB) in a mobile communication system, comprising:

a despreading part for despreading the RCB received through a transmission rate control channel;

a symbol summation control part for outputting a symbol summation control signal so that a summation operation can be carried out based on the number of repeats preset according to a transmission rate of packet data previously transmitted through the transmission rate control channel;

a symbol summation part for summing the despreaded RCB according to a symbol summation control signal; and

a determination part for receiving an output of the symbol summation part, determining an RCB value of the previously transmitted packet data, and controlling the data transmission rate according to a result of the determination.

8. The apparatus of claim 7, further comprising:

a packet data transmission part for transmitting the packet data at the data transmission rate based on the result of the determination.

9. The apparatus of claim 7, wherein the determination part outputs a transmission rate control signal so that the data transmission rate in a next transmission interval can be maintained at a rate equal to the data transmission rate in a previous transmission interval if the previously transmitted RCB is “

0”

as the result of the determination.

10. The apparatus of claim 7, wherein the determination part outputs a transmission rate control signal so that the data transmission rate can be incremented in a next transmission interval if the previously transmitted RCB is “

1”

as the result of the determination.

11. The apparatus of claim 10, wherein the number of the repeated RCBs is increased when the packet data transmission rate is increased.

12. The apparatus of claim 10, wherein the number of the repeated RCBs is decreased when the packet data transmission rate is decreased.

13. The apparatus of claim 7, wherein the determination part outputs a transmission rate control signal so that the data transmission rate can be decremented in a next transmission interval if the previously transmitted RCB is “

−

1”

as the result of the determination.

14. A method for transmitting a rate control bit (RCB) in a mobile communication system, comprising:

generating the RCB according to a data transmission rate determined under control of a scheduler;

outputting a repetition control signal having a value that differs according to the data transmission rate;

repeating the generated RCB according to the repetition control signal; and

spreading the repeated RCB to output the spread RCB.

15. The method of claim 14, further comprising:

transmitting the spread RCB through a radio channel.

16. A method for transmitting a rate control bit (RCB) in a mobile communication system, comprising:

generating the RCB according to a data transmission rate determined under control of a scheduler;

spreading the generated RCB to output the spread RCB; and

controlling a power for the spread RCB with a power value that differs according to the data transmission rate and outputting the spread RCB based on the power control operation.

17. The method of claim 16, further comprising:

transmitting the outputted spread RCB through a radio channel.

18. A method for receiving a rate control bit (RCB) through a transmission rate control channel in a mobile communication system, comprising:

despreading the RCB received through the transmission rate control channel and outputting the despread RCB;

summing the despread RCB according to a symbol summation control signal and outputting a result of the summation;

outputting the symbol summation control signal so that a summation operation can be carried out based on the number of repeats preset according to a transmission rate of packet data previously transmitted through the transmission rate control channel; and

receiving an output of the symbol summation part, determining an RCB value of the previously transmitted packet data, and controlling the data transmission rate according to a result of the determination.

19. The method of claim 18, further comprising:

transmitting the packet data at the data transmission rate based on the result of the determination.