Method for transmitting response information in mobile communications system

• US 7,848,308 B2
• Filed: 04/23/2009
• Issued: 12/07/2010
• Est. Priority Date: 02/07/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Young Dae, Park, Sung Jun, Chun, Sung Duck, Jung, Myung Cheul
• Primary Examiner(s): Kumar; Pankaj
• Assistant Examiner(s): Sharma; Gautam
• Application Number:
  US12/429,111
• Publication Number:
  US 20090201891A1
• Time in Patent Office: 593 Days
• Field of Search: 370/310, 370/312, 370/329, 370/342, 370/345, 370/350, 455/434, 455/450, 455/452.1, 455/464, 455/507, 455/509, 455/526
• US Class Current: 370/350
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/18 End to end
• CPC Class Codes: H04L 47/34 ensuring sequence integrity, e.g. using sequence numbers
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 56/0045 compensating for timing error by altering transmission time
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method for transmitting radio resources in a mobile communication system is disclosed. The method includes receiving a random access channel (RACH) preamble from a plurality of UEs and transmitting response information associated with the received preambles over a common channel wherein the plurality UEs can access the common channel and receive corresponding information. If a HARQ scheme is used when a UE transmits data to the eNode-B using uplink radio resources allocated over the RACH, the eNode-B does not pre-allocate uplink radio resources required for re-transmission and performs allocation of radio resources for a first transmission of HARQ. If the re-transmission is required, the eNode-B allocates the radio resources required for the re-transmission with the NACK signal. If re-transmission is not required, the present invention can reduce an amount of wasted radio resources.

Claims

1. A method for a user equipment (UE) to perform a random access in a mobile communication system, the method comprising:

transmitting a specific random access preamble;

receiving a medium access control packet data unit (MAC PDU) comprising one or more random access responses and a MAC header comprising one or more header parts, each of the header parts corresponding to each of the random access responses; and

processing information on a specific random access response, when the specific random access response comprises an identifier corresponding to the transmitted specific random access preamble,

wherein all of the header parts is in a first part of the MAC PDU and all of the random access responses is in a second part of the MAC PDU subsequent to the first part.

2. The method of claim 1, wherein the MAC PDU is received via a downlink common channel.

3. The method of claim 1, wherein the specific random access response comprises uplink resource information allocated to the UE, a temporary identifier of the UE and a timing synchronization related variable.

4. The method of claim 3, further comprising:

transmitting an uplink signal using the uplink resource information.

5. The method of claim 4, further comprising:

receiving a message indicating uplink resource information newly allocated to the UE; and

retransmitting the uplink signal using the newly allocated uplink resource information.

6. The method of claim 5, wherein the message comprising the newly allocated uplink resource information corresponds to a negative acknowledgement (NACK).

7. A method for a network to control a random access of a user equipment (UE) in a mobile communication system, the method comprising:

receiving a specific random access preamble from the UE; and

transmitting a medium access control packet data unit (MAC PDU) comprising one or more random access responses and a MAC header comprising one or more header parts, each of the header parts corresponding to each of the random access responses,

wherein all of the header parts is in a first part of the MAC PDU and all of the random access responses is in a second part of the MAC PDU subsequent to the first part, and

wherein when the MAC PDU comprises a specific random access response corresponding to the specific random access preamble, the specific random access response comprises an identifier corresponding to the specific random access preamble.

8. The method of claim 7, wherein the MAC PDU is transmitted via a downlink common channel.

9. The method of claim 7, wherein the specific random access response comprises uplink resource information allocated to the UE, a temporary identifier of the UE and a timing synchronization related variable.

10. The method of claim 9, further comprising:

receiving an uplink signal associated with the uplink resource information.

11. The method of claim 10, further comprising:

transmitting a message indicating an uplink resource information newly allocated to the UE; and

receiving a retransmitted uplink signal associated with the newly allocated uplink resource information.

12. The method of claim 11, wherein the message comprising the newly allocated uplink resource information corresponds to a negative acknowledgement (NACK).