Method of transmitting scheduling information on an enhanced uplink dedicated channel in a mobile communication system

• US 20050265301A1
• Filed: 02/14/2005
• Published: 12/01/2005
• Est. Priority Date: 02/14/2004
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Choi, Sung-Ho, Heo, Youn-Hyoung, Jeong, Kyeong-In, Kwak, Yong-Jun, Lee, Ju-Ho
• Application Number:
  US11/057,894
• Publication Number:
  US 20050265301A1
• Time in Patent Office: Days
• US Class Current: 370/349
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/1867 Arrangements specially adapted for the transmitter end
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

An apparatus and method of transmitting scheduling information from a UE to a Node B to request Node B controlled scheduling in an asynchronous CDMA communication system supporting an E-DCH packet data service is provided. The UE generates a MAC-e PDU including only scheduling information representing a buffer status and a power status in relation to uplink data transmission, and transmits the MAC-e PDU on an E-DCH along with TF information indicating the transmission of the MAC-e PDU including the scheduling information. The Node B receives the scheduling information on the E-DCH and schedules uplink data transmission according to the scheduling information.

Claims

1. A method of transmitting scheduling information for requesting Node B scheduling in a user equipment (UE) in a mobile communication system supporting an enhanced uplink packet data service, comprising the steps of:

generating a MAC-e (Medium Access Control-e) control protocol data unit (PDU) including scheduling information, the scheduling information representing at least one of a buffer status and a power status in relation to uplink data transmission; and

transmitting the MAC-e control PDU on a first enhanced uplink dedicated channel (E-DCH) different from a second E-DCH for transmitting a MAC-e data PDU including uplink packet data.

2. The method of claim 1, wherein the step of transmitting the MAC-e control PDU on the first E-DCH comprises the steps of:

selecting a transport format combination (TFC) that enables simultaneous transmission of the packet data and the scheduling information for a transmission time interval (TTI); and

simultaneously transmitting the packet data and the scheduling information according to the TFC.

3. The method of claim 1, wherein the step of transmitting the MAC-e control PDU on the first E-DCH comprises the steps of:

selecting a transport format combination (TFC) that enables transmission of one of the packet data and the scheduling information for a transmission time interval (TTI); and

transmitting one of the packet data and the scheduling information according to the TFC.

4. The method of claim 3, wherein the step of transmitting the MAC-e control PDU on the first E-DCH further comprises the steps of:

prioritizing the packet data and the scheduling information; and

determining to transmit the scheduling information in the absence of the packet data or if the packet data has a lower priority level than the scheduling information.

5. A method of transmitting scheduling information for requesting Node B scheduling in a user equipment (UE) in a mobile communication system supporting an enhanced uplink packet data service, comprising the steps of:

generating scheduling information representing at least one of a buffer status and a power status in relation to uplink data transmission;

transmitting the scheduling information on an enhanced uplink dedicated channel (E-DCH) for a transmission time interval (TTI); and

transmitting an indicator indicating the transmission of the scheduling information on a control channel other than the E-DCH.

6. The method of claim 5, wherein the indicator is a transport format indicator (TFI) indicating a transport format (TF) preset for transmission of the scheduling information.

7. The method of claim 5, wherein the indicator is a transport format combination indicator (TFCI) indicating a transport format combination (TFC) preset for transmission of the scheduling information.

8. The method of claim 7, wherein the scheduling information is transmitted using a coding rate and rate matching parameter used for the uplink packet data.

9. The method of claim 5, wherein the scheduling information is a MAC-e (Medium Access Control-e) control protocol data unit (PDU) representing at least one of the buffer status and the power status.

10. The method of claim 5, wherein the uplink packet data is a MAC-e (Medium Access Control-e) data protocol data unit (PDU) including uplink data to be transmitted.

11. A method of receiving scheduling information requesting Node B scheduling in a Node B in a mobile communication system supporting an enhanced uplink packet data service, comprising the steps of:

receiving a MAC-e (Medium Access Control-e) protocol data unit (PDU) on an enhanced uplink dedicated channel (E-DCH) and transport format (TF) information of the MAC-e PDU;

determining from the TF information if the MAC-e PDU is scheduling information representing at least one of a buffer status and a power status in relation to uplink data transmission; and

assigning scheduling information representing a data rate for the E-DCH according to the scheduling information.

12. The method of claim 11, wherein the TF information is a transport format indicator (TFI) indicating a TF preset for transmission of the scheduling information.

13. The method of claim 11, wherein the TF information is a transport format combination indicator (TFCI) indicating a transport format combination (TFC) preset for transmitting the scheduling information.

14. An apparatus for transmitting scheduling information to request Node B scheduling in a user equipment (UE) in a mobile communication system supporting an enhanced uplink packet data service, comprising:

a controller for generating scheduling information representing at least one of a buffer status and a power status in relation to uplink data transmission;

a first transmitter for transmitting the scheduling information on an enhanced uplink dedicated channel (E-DCH) for a transmission time interval (TTI) for which uplink packet data is not transmitted; and

a second transmitter for transmitting an indicator indicating the transmission of the scheduling information on a control channel other than the E-DCH.

15. The apparatus of claim 14, wherein the indicator is a transport format indicator (TFI) indicating a transport format (TF) preset for transmission of the scheduling information.

16. The apparatus of claim 14, wherein the indicator is a transport format combination indicator (TFCI) indicating a transport format combination (TFC) preset for transmission of the scheduling information.

17. The apparatus of claim 16, wherein the first transmitter transmits the scheduling information using a same coding rate and rate matching parameter as used for the uplink packet data.

18. The apparatus of claim 14, wherein the scheduling information is a MAC-e (Medium Access Control-e) control protocol data unit (PDU) representing the buffer status and the power status.

19. The apparatus of claim 14, wherein the uplink packet data is a MAC-e (Medium Access Control-e) data protocol data unit (PDU) including uplink data to be transmitted.

20. A apparatus for receiving scheduling information requesting Node B scheduling in a Node B in a mobile communication system supporting an enhanced uplink packet data service, comprising:

a first receiver for receiving a MAC-e (Medium Access Control-e) protocol data unit (PDU) on an enhanced uplink dedicated channel (E-DCH);

a second receiver for receiving information about a transport format (TF) of the MAC-e PDU;

a controller for determining from the TF information if the MAC-e PDU is scheduling information representing at least one of a buffer status and a power status in relation to uplink data transmission; and

a scheduler for uplink data transmission on the E-DCH according to the scheduling information, if the MAC-e PDU is the scheduling information.

21. The apparatus of claim 20, wherein the TF information is a transport format indicator (TFI) indicating a TF preset for transmission of the scheduling information.

22. The apparatus of claim 20, wherein the TF information is a transport format combination indicator (TFCI) indicating a TFC preset for transmission of the scheduling information.

23. A method for data transmission in a mobile communication system, comprising the steps of:

at MAC layer, generating a MAC (Medium Access Control) protocol data unit (PDU) including scheduling information representing at least one of a buffer status and a power status in relation to data transmission;

transmitting the scheduling information on a first physical channel; and

transmitting transport format (TF) information of the MAC PDU on a second physical channel.