METHOD FOR TRANSMITTING RESPONSE INFORMATION IN MOBILE COMMUNICATIONS SYSTEM

• US 20110032891A1
• Filed: 10/12/2010
• Published: 02/10/2011
• 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
• Granted Patent: US 8,223,713 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• 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

1-19. -19. (canceled)

20. A method of performing a random access by a user equipment (UE) in a mobile communication system, the method comprising:

transmitting a random access preamble to a network;

receiving a medium access control packet data unit (MAC PDU) comprising a header part and N random access responses from the network, where N is a natural number, wherein the header part includes N subheaders continuously included within the header part, wherein the header part further includes indication of an end of the header part, wherein each of the N subheaders corresponds to each of the random access responses; and

processing information on a specific random access response among the N random access responses based on information on the N subheaders, wherein the UE recognizes the beginning of the N random access responses based on the indication.

21. The method of claim 20, wherein processing the information comprises:

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

22. The method of claim 20, wherein processing the information comprises:

processing uplink resource information allocated to the UE, a temporary identifier of the UE and a timing synchronization related variable received on the specific random access response.

23. The method of claim 22, further comprising:

transmitting an uplink signal using the processed uplink resource information.

24. The method of claim 20, wherein the MAC PDU is received via a downlink common channel.

25. A method for a network to control random accesses of one or more user equipments (UEs) in a mobile communication system, the method comprising:

receiving one or more random access preambles from the one or more UEs;

transmitting a medium access control packet data unit (MAC PDU) comprising a header part and N random access responses to the one or more UEs, where N is a natural number, wherein the header part includes N subheaders continuously included within the header part, wherein the header part further includes indication of an end of the header part, wherein each of the N subheaders corresponds to each of the random access responses,

wherein the indication is for the one or more UEs to recognize the beginning of the N random access responses when processing information on a specific random access response among the N random access responses based on information on the N subheaders.

26. The method of claim 25, wherein each of the N subheaders comprises an identifier for a specific UE to find whether the random access responses corresponding to each of the N subheaders correspond to a random access preamble from the specific UE.

27. The method of claim 25, wherein each of the N random access responses comprises uplink resource information allocated to a specific UE, a temporary identifier of the specific UE and a timing synchronization related variable.

28. The method of claim 27, further comprising:

receiving an uplink signal from the specific UE using the uplink resource information.

29. The method of claim 25, wherein the MAC PDU is transmitted via a downlink common channel.

30. A user equipment (UE) performing a random access in a mobile communication system, the UE comprising:

a transmitter configured to transmit a random access preamble to a network;

a receiver configured to receive a medium access control packet data unit (MAC PDU) comprising a header part and N random access responses from the network, where N is a natural number, wherein the header part includes N subheaders continuously included within the header part, wherein the header part further includes indication of an end of the header part, wherein each of the N subheaders corresponds to each of the random access responses; and

a processor configured to process information on a specific random access response among the N random access responses based on information on the N subheaders, wherein the UE recognize the beginning of the N random access responses based on the indication.

31. The UE of claim 30, wherein the processor processes the information on the specific random access response when a subheader corresponding to the specific random access response comprises an identifier corresponding to the transmitted random access preamble.

32. The UE of claim 30, wherein the processor processes uplink resource information allocated to the UE, a temporary identifier of the UE and a timing synchronization related variable received on the specific random access response.

33. The UE of claim 32, wherein the transmitter is further configured to transmit an uplink signal using the processed uplink resource information.

34. The UE of claim 30, wherein the MAC PDU is received via a downlink common channel.