Method for transmitting response information in mobile communications system

• US 9,462,576 B2
• Filed: 04/30/2013
• Issued: 10/04/2016
• 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, Chun, Sung Duck, Jung, Myung Cheul, Park, Sung Jun
• Primary Examiner(s): Phillips, Hassan
• Assistant Examiner(s): Sharma, Gautam
• Application Number:
  US13/874,199
• Publication Number:
  US 20130242915A1
• Time in Patent Office: 1,253 Days
• Field of Search: None
• US Class Current: 1/1
• 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 to perform a random access procedure to a network in a mobile communication system, the method comprising:

transmitting a first message of the random access procedure comprising a random access preamble to the network;

receiving a second message of the random access procedure comprising a medium access control protocol data unit (MAC PDU) via a downlink shared channel,

wherein the second message comprises uplink resource allocation information;

transmitting a third message of the random access procedure comprising uplink data based on the uplink resource allocation information; and

receiving a fourth message of the random access procedure from the network,

wherein a HARQ (Hybrid Automatic Repeat Request) scheme is applied from the third message to the fourth message of the random access procedure while the HARQ scheme is not applied to the second message of the random access procedure.

2. The method of claim 1, wherein the uplink resource allocation information is received dynamically for transmitting the uplink data.

3. The method of claim 1, wherein additional uplink resource allocation information is received with a negative acknowledgement (NACK) signal to the first message.

4. A method for a network to control a random access procedure of a user equipment in a mobile communication system, the method comprising:

receiving a first message of the random access procedure comprising a random access preamble from the user equipment;

transmitting a second message of the random access procedure comprising a medium access control protocol data unit (MAC PDU) via a downlink shared channel,

wherein the second message comprises uplink resource allocation information;

receiving a third message of the random access procedure comprising uplink data based on the uplink resource allocation information; and

transmitting a fourth message of the random access procedure to the user equipment,

wherein a HARQ (Hybrid Automatic Repeat Request) scheme is applied from the third message to the fourth message of the random access procedure while the HARQ scheme is not applied to the second message of the random access procedure.

5. The method of claim 4, wherein the uplink resource allocation information is transmitted dynamically for receiving the uplink data.

6. The method of claim 4, wherein additional uplink resource allocation information is transmitted with a negative acknowledgement (NACK) signal to the first message.

7. A user equipment (UE) configured to perform a random access procedure to a network in a mobile communication system, the UE comprising:

a transceiver configured to

transmit a first message of the random access procedure comprising a random access preamble to the network,

receive a second message of the random access procedure comprising a medium access control protocol data unit (MAC PDU) via a downlink shared channel,

wherein the random access responses comprise uplink resource allocation information,

transmit a third message of the random access procedure comprising uplink data based on the uplink resource allocation information, and

receive a fourth message of the random access procedure from the network; and

a processor configured to apply a HARQ (Hybrid Automatic Repeat Request) scheme from the transmission of the third message to the reception of the fourth message of the random access procedure while the HARQ scheme is not applied to the reception of the second message of the random access procedure.

8. A network device configured to control a random access procedure of a user equipment (UE) in a mobile communication system, the device comprising:

a transceiver configured to

receive a first message of the random access procedure comprising a random access preamble from the user equipment,

transmit a second message of the random access procedure comprising a medium access control protocol data unit (MAC PDU) via a downlink shared channel,

wherein the random access responses comprise uplink resource allocation information,

receive a third message of the random access procedure comprising uplink data based on the uplink resource allocation information, and

transmit a fourth message of the random access procedure to the user equipment; and

a processor configured to apply a HARQ (Hybrid Automatic Repeat Request) scheme from the reception of the third message to the transmission of the fourth message of the random access procedure of the random access procedure while the HARQ scheme is not applied to the transmission of the second message of the random access procedure.