Method of controlling reverse link in a mobile communication system

• US 20050041589A1
• Filed: 08/20/2004
• Published: 02/24/2005
• Est. Priority Date: 08/21/2003
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Han, Jin-Kyu, Kim, Youn-Sun, Kim, Dong-Hee, Kwon, Hwan-Joon
• Application Number:
  US10/922,325
• Publication Number:
  US 20050041589A1
• Time in Patent Office: Days
• US Class Current: 370/236
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 52/286 during data packet transmission, e.g. high speed packet access [HSPA]

Abstract

A method of providing QoS information and controlling reverse transmit power in a mobile communication system is provided. In the mobile communication system, an MS transmits to a BS, packet data on an R-PDCH for a selected one of a plurality of different services, and packet data control information about the packet data on an R-PDCCH. The packet data control information includes QoS information indicating the type of the selected service.

Claims

1. A method in a mobile station (MS) of transmitting to a base station (BS) packet data on a reverse packet data channel (R-PDCH) and packet data control information on a reverse packet data control channel (R-PDCCH), the packet data being delivered for a service selected by the MS among a plurality of different services and the packet data control information being used for demodulation of the packet data, the method comprising the steps of:

generating the packet data control information including quality of service (QoS) information indicating the type of the service selected; and

transmitting the packet data control information to the BS on the R-PDCCH.

2. The method of claim 1, wherein the packet data control information further includes a data rate or an encoder packet (EP) size, a subpacket ID, and a mobile status indication bit (MSIB).

3. The method of claim 1, wherein the transmission step comprises the step of transmitting the R-PDCH and the R-PDCCH simultaneously.

4. A method in a mobile station (MS) of transmitting packet data control information to a base station (BS) on a reverse packet data control channel (R-PDCCH), the packet data control information being control information for packet data transmitted on a reverse packet data channel (R-PDCH) from the MS, the method comprising the step of:

transmitting to the BS a traffic to pilot power ratio (TPR) table information indicating a TPR table selected among a plurality of TPR tables on the R-PDCCH,

wherein each of the TPR tables lists TPR values for respective data rates.

5. The method of claim 4, wherein the transmission step comprises the step of transmitting the R-PDCH and the R-PDCCH simultaneously.

6. The method of claim 4, further comprising the step of selecting a data rate and a TPR value within a maximum transmit power allowed by the BS and transmitting the packet data at the data rate and the TPR value.

7. The method of claim 4, wherein the packet data control information further includes a data rate or encoder packet (EP) size of the packet data, a subpacket ID, and a mobile status indication bit (MSIB).

8. The method of claim 4, wherein the selected TPR table is one of either a TPR table for a normal quality of service (QoS) and a TPR table for an enhanced QoS.

9. The method of claim 4, wherein the transmission step comprises the step of transmitting the TPR table information in a QoS field of the R-PDCCH.

10. The method of claim 4, wherein the transmission step comprises the steps of:

selecting the TPR table from among the plurality of TPR tables;

generating the packet data control information including the TPR table information indicating the TPR table selected from among a plurality of TPR tables; and

transmitting the packet data control information on the R-PDCCH.

11. A method in a base station (BS) of receiving packet data control information from a mobile station (MS) on a reverse packet data control channel (R-PDCCH), the packet data control information being control information about packet data that the MS transmits on a reverse packet data channel (R-PDCH), the method comprising the step of:

receiving from the MS a traffic to pilot power ratio (TPR) table information indicating a TPR table selected by the MS from among a plurality of TPR tables on the R-PDCCH,

wherein each of the TPR tables lists TPR values for respective data rates.

12. The method of claim 11, wherein the reception step comprises the step of receiving information on the R-PDCH and the R-PDCCH simultaneously.

13. The method of claim 11, further comprising the step of receiving the packet data at a data rate and TPR that the MS selects within a maximum transmit power allowed by the BS from the selected TPR table.

14. The method of claim 11, wherein the packet data control information further includes a data rate or encoder packet (EP) size of the packet data, a subpacket ID, and a mobile status indication bit (MSIB).

15. The method of claim 11, wherein the selected TPR table is one of either a TPR table for a normal quality of service (QoS) and a TPR table for an enhanced QoS.

16. The method of claim 11, wherein the reception step comprises the step of receiving the TPR table information in a QoS field of the R-PDCCH.

17. A scheduling method in a base station (BS) that receives from a mobile station (MS) packet data on a reverse packet data channel (R-PDCH) and packet data control information on a reverse packet data control channel (R-PDCCH), the packet data being for a service selected by the MS from among a plurality of different services and the packet data control information being control information about the packet data, the method comprising the steps of:

updating the transmit power of the MS with the packet data control information received on the R-PDCCH; and

performing scheduling based on the updated transmit power and transmitting scheduling information related to the scheduling to the MS.

18. The scheduling method of claim 17, wherein the packet data control information includes information about the data rate of the packet data and traffic to pilot power ratio (TPR) table information indicating a specific TPR table has been selected by the MS.

19. The scheduling method of claim 17, wherein the packet data control information includes buffer information of the packet data, for scheduling.

20. The scheduling method of claim 17, further comprising the steps of:

detecting a maximum transmission number corresponding to the service type of the received packet data, if the packet data has errors;

performing an outer loop power control for the MS according to the maximum retransmission number; and

transmitting an outer loop power control result together with the scheduling information to the MS.

21. The scheduling method of claim 17, further comprising the steps of:

checking errors in the received packet data and determining the reliability of an ACK (Acknowledgement) channel (ACKCH) according to the service type of the packet data; and

generating an ACK/NACK (Acknowledgement/Non-Acknowledgement) message according to the determined reliability of the ACKCH; and

transmitting the ACK/NACK message to the MS on the ACKCH.

22. The scheduling method of claim 21, wherein a maximum transmission number of the ACK/NACK message is determined according to the reliability of the ACK/NACK message.

23. The scheduling method of claim 21, wherein the transmit power of the ACK/NACK message is determined according to the determined reliability of the ACK/NACK message.

24. A method of determining the data rate of reverse packet data in a mobile station (MS), comprising the steps of:

receiving rate control information from a base station (BS) and determining an authorized traffic to pilot power ratio (TPR);

selecting one of a plurality of TPR tables, for transmission of packet data;

determining a data rate satisfying the authorized TPR in the selected TPR table; and

transmitting the packet data at the determined data rate.

25. The method of claim 24, wherein the authorized TPR determining step comprises the step of determining the authorized TPR in a pre-selected TPR table according to the received rate control information.

26. The method of claim 24, wherein the TPR of the determined data rate is the highest TPR which is still lower than the authorized TPR.

27. The method of claim 24, wherein the TPR of the determined data rate is most substantially equal to the authorized TPR.

28. The method of claim 24, wherein the determined data rate corresponds to a TPR less than or equal to the authorized TPR in the selected TPR table.

29. The method of claim 24, further comprising the step of transmitting TPR table information indicating the selected TPR table on a reverse packet data control channel (R-PDCCH).

30. The method of claim 29, wherein the TPR table information transmitting step further comprises the step of transmitting the TPR table information in a quality of service (QoS) field of the R-PDCCH.

31. A method scheduling reverse packet data in a base station (BS), comprising the steps of:

transmitting rate control information to a mobile station (MS);

receiving from the MS a reverse packet data control channel (R-PDCCH) including traffic to pilot power ratio (TPR) table information indicating a TPR table selected by the MS among a plurality of TPR tables; and

performing scheduling based on the TPR table information.