Methods for Improving Uplink Communications in a Wideband Code Division Multiple Access (Wcdma) Communication System

• US 20070242652A1
• Filed: 09/07/2005
• Published: 10/18/2007
• Est. Priority Date: 09/15/2004
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Dahlman, Erik, Cheng, Jung-Fu, Peisa, Janne, Parkvall, Stefan, Englund, Eva, Wang, Yi-Pin, Edvardsson, Maria
• Granted Patent: US 8,270,376 B2
• Time in Patent Office: Days
• US Class Current: 370/342
• 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 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04W 52/48 during retransmission after error or non-acknowledgment

Abstract

Methods for improving uplink communications in a Wideband Code Division Multiple Access (WCDMA) communication system, wherein mobile terminals can transmit at various transmission power levels. In a mobile terminal, the method includes the steps of receiving a configuration message having at least one of a power offset parameter and a maximum number of retransmission attempts parameter; when the mobile terminal performs a non-scheduled transmission, it transmits according to the parameters contained in the configuration message. In a network node, the method includes the steps of transmitting to at least one mobile terminal the configuration message having at least one of a power offset parameter and a maximum number of retransmission attempts parameter; and, adjusting a power setting for the transmission of acknowledgement or negative-acknowledgement messages from the wireless network to one or more of mobile terminals.

Claims

1. A method in a mobile terminal for improving uplink communications in a wireless communication system, wherein a mobile terminal can transmit at various transmission power levels, said method comprising the steps of:

receiving, by said mobile terminal, a configuration message comprising at least one of a power offset parameter and a maximum number of retransmission attempts parameter; and

,

when said mobile terminal performs a non-scheduled transmission, perform said transmission according to said at least one power offset parameter and said maximum number of retransmission attempts parameter contained in said configuration message.

2. The method recited in claim 1, wherein said transmission power level for said non-scheduled transmission is a function of said power offset parameter.

3. The method recited in claim 1, wherein said non-scheduled transmission is retransmitted as a function of said maximum number of retransmission attempts parameter.

4. The method recited in claim 3, wherein said retransmission of said non-scheduled transmission is a Hybrid Automatic Repeat Request (HARQ).

5. The method recited in claim 4, further comprising the step of said mobile terminal receiving one or more HARQ status reports during said non-scheduled transmission.

6. The method recited in claim 5, wherein said non-scheduled transmission is retransmitted as a function of said maximum number of retransmission attempts parameter and information contained in said one or more HARQ status reports.

7. The method recited in claim 1, wherein said configuration message comprises at least one of said power offset parameter and said maximum number of retransmission attempts parameter for a minimum set of transport formats.

8. The method recited in claim 1, wherein said configuration message further comprises at least one of said power offset parameter and said maximum number of retransmission attempts parameter for use in transmitting high priority data in a boost configuration.

9. The method recited in claim 8, wherein said configuration message comprises boost configuration parameters for a plurality of transport formats.

10. The method according to claim 1, wherein the wireless communication system is a Wideband Code Division Multiple Access (WCDMA) system.

11. The method according to claim 1, wherein the wireless communication system is an Orthogonal Frequency Division Multiplexing (OFDM) system.

12. A method in a network node for improving uplink communications in a wireless communication system, wherein mobile terminals can transmit at various transmission power levels, said method comprising the steps of:

transmitting, from a wireless network to at least one of said mobile terminals, a configuration message comprising at least one of a power offset parameter and a maximum number of retransmission attempts parameter; and

,

adjusting a power setting for the transmission of acknowledgement or negative-acknowledgement messages from said wireless network to one or more of said mobile terminals.

13. The method recited in claim 12, wherein said configuration message comprises at least one of said power offset parameter and said maximum number of retransmission attempts parameter for a minimum set of transport formats.

14. The method recited in claim 12, wherein said configuration message further comprises at least one of said power offset parameter and said maximum number of retransmission attempts parameter for use in transmitting high priority data in a boost configuration.

15. The method recited in claim 12, wherein said configuration message comprises boost configuration parameters for a plurality of transport formats.

16. The method recited in claim 13, wherein said step of adjusting a power setting for the transmission of acknowledgement or negative-acknowledgement messages from said wireless network to one or more of said mobile terminals comprises the step of prioritizing the transmission of said messages to said one or more of said mobile terminals.

17. The method recited in claim 16, wherein said step of prioritizing comprises dropping the transmission of said acknowledgement or negative-acknowledgement messages as a function of the required transmission power.

18. The method recited in claim 16, wherein said step of prioritizing comprises dropping the transmission of said acknowledgement or negative-acknowledgement messages as a function of the service class of each mobile terminal to which said messages are to be transmitted.

19. The method recited in claim 16, wherein said step of prioritizing comprises dropping the transmission of said acknowledgement or negative-acknowledgement messages as a function of the data rate currently in use by each mobile terminal to which said messages are to be transmitted.

20. The method recited in claim 16, wherein said step of prioritizing comprises dropping the transmission of said acknowledgement or negative-acknowledgement messages as a function of the data priority for each mobile terminal to which said messages are to be transmitted.

21. The method recited in claim 16, wherein said step of prioritizing comprises transmitting said acknowledgement or negative-acknowledgement messages only within a radio sector which currently experiences the best radio conditions.

22. The method according to claim 12, wherein the wireless communication system is a Wideband Code Division Multiple Access (WCDMA) system.

23. The method according to claim 12, wherein, the wireless communication system is an Orthogonal Frequency Division Multiplexing (OFDM) system.