Packet transmission acknowledgement in wireless communication system

• US 7,372,831 B2
• Filed: 08/09/2005
• Issued: 05/13/2008
• Est. Priority Date: 08/11/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Won, Seung Hwan, Seo, Dong Youn, Kim, Bong Hoe, Ahn, Joon Kui, Kim, Hak Seong, Roh, Dong Wook
• Primary Examiner(s): TRINH, TAN H
• Application Number:
  US11/200,560
• Publication Number:
  US 20060034216A1
• Time in Patent Office: 1,008 Days
• Field of Search: 370/328, 370/230, 370/400, 370/342, 370/441, 370/316, 370/401, 370/335, 370/232, 370/270, 370/338, 375/264, 375/259, 455/414.1, 455/433, 455/108, 455/115.1
• US Class Current: 370/328
• CPC Class Codes: H04L 1/1692 Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 27/02 Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation H04L27/32 takes precedence
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence

Abstract

Transmitting an acknowledgement/negative acknowledgement (ACK/NACK) signal in association with a packet transmitted on an uplink is disclosed. The method includes the steps of receiving a packet transmitted from a user equipment, decoding the packet, and determining whether the packet has been successfully decoded, transmitting an ACK signal or a NACK signal, based on the decoding result. Different transmission powers are allocated for the ACK signal and the NACK signal. Alternatively, the transmission power for the NACK signal selectively has an OFF level. The present invention optimizes the transmission powers for downlink ACK/NACK signals in accordance with the required reception quality of each of the ACK/NACK signals, and thus, enables the system to operate efficiently.

Claims

1. A method of acknowledging receipt of uplink data in a wireless communication system, the method comprising:

transmitting packet data from a user equipment to at least one of a serving network and a non-serving network through a dedicated channel;

receiving a first acknowledgement status indicator from the serving network in response to decoding the packet data by the serving network, wherein the first acknowledgement status indicator is transmitted using a phase shift key modulation; and

receiving a second acknowledgement status indicator from the non-serving network in response to decoding the packet data by the non-serving network, wherein the second acknowledgement status indicator is transmitted using an amplitude shifting key modulation,

wherein the second acknowledgement status indicator comprises an acknowledgement indicator if the packet data is decoded without error and no signal is received if the packet data is decoded with error.

2. The method of claim 1, wherein the first acknowledgement status indicator comprises an acknowledgement indicator if the packet data is decoded without error and a negative acknowledgement indicator if the packet data is decoded with error.

3. The method of claim 1, wherein the acknowledgement indicator comprises a positive amplitude signal.

4. The method of claim 1, wherein the phase shift key modulation comprises a binary phase shift key modulation.

5. The method of claim 1, wherein the amplitude shifting key modulation comprises an on-off key modulation.

6. The method of claim 1, wherein the dedicated channel is an enhanced uplink dedicated channel.

7. The method of claim 1, wherein the user equipment is in communication with the non-serving network during a soft handover.

8. A method of acknowledging receipt of uplink data by a network in a wireless communication system, the method comprising:

receiving packet data from a user equipment through a dedicated channel;

decoding the packet data;

transmitting a first acknowledgement status indicator in response to decoding the packet data, wherein the first acknowledgement status indicator is transmitted using a phase shift key modulation if the network is a serving network of the user equipment; and

transmitting a second acknowledgement status indicator in response to decoding the packet data, wherein the second acknowledgement status indicator is transmitted using an amplitude shifting key modulation if the network is a non-serving network of the user equipment.

9. The method of claim 8, wherein the first acknowledgement status indicator comprises an acknowledgement indicator if the packet data is decoded without error and a negative acknowledgement indicator if the packet data is decoded with error.

10. The method of claim 8, wherein the second acknowledgement status indicator comprises an acknowledgement indicator if the packet data is decoded without error and no signal is received if the packet data is decoded with error.

11. The method of claim 10, wherein the acknowledgement indicator comprises a positive amplitude signal.

12. The method of claim 8, wherein the phase shift key modulation comprises a binary phase shift key modulation.

13. The method of claim 8, wherein the amplitude shifting key modulation comprises an on-off key modulation.

14. The method of claim 8, wherein the dedicated channel is an enhanced uplink dedicated channel.

15. The method of claim 8, wherein the user equipment is in communication with the non-serving network during a soft handover.

16. A mobile terminal for communicating uplink data in a wireless communication system, the mobile terminal comprising:

means for transmitting packet data to at least one of a serving network and a non-serving network through a dedicated channel;

means for receiving a first acknowledgement status indicator from the serving network in response to decoding the packet data by the serving network, wherein the first acknowledgement status indicator is transmitted using a phase shift key modulation; and

means for receiving a second acknowledgement status indicator from the non-serving network in response to decoding the packet data by the non-serving network, wherein the second acknowledgement status indicator is transmitted using an amplitude shifting key modulation,

wherein the second acknowledgement status indicator comprises an acknowledgement indicator if the packet data is decoded without error and no signal is received if the packet data is decoded with error.

17. A network for acknowledging receipt of uplink data in a wireless communication system, the network comprising:

means for receiving packet data from a user equipment through a dedicated channel;

means for decoding the packet data;

means for transmitting a first acknowledgement status indicator in response to decoding the packet data, wherein the first acknowledgement status indicator is transmitted using a phase shift key modulation if the network is a serving network of the user equipment; and

means for transmitting a second acknowledgement status indicator in response to decoding the packet data, wherein the second acknowledgement status indicator is transmitted using an amplitude shifting key modulation if the network is a non-serving network of the user equipment.