Method for transmitting response information in mobile communications system

• US 10,045,381 B2
• Filed: 05/26/2017
• Issued: 08/07/2018
• 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 A
• Assistant Examiner(s): Sharma, Gautam
• Application Number:
  US15/607,016
• Publication Number:
  US 20170265231A1
• Time in Patent Office: 438 Days
• 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 random access preamble to a network;

receiving a random access response message comprising multiple random access responses from the network through a downlink shared channel (DL-SCH),

wherein a size of the random access response message is not fixed,

wherein the random access response message has a format of a medium access control protocol data unit (MAC PDU) comprising multiple header parts, each of the header parts corresponding to each of the multiple random access responses,

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

wherein each of the multiple random access responses comprises TA (Timing Advanced) information and uplink scheduling information; and

processing the received random access response message to adjust an uplink transmission time based on the TA information or to find A resource for an uplink transmission based on the uplink scheduling information.

2. The method of claim 1, further comprising:

receiving control information informing of an allocation of the random access message through a downlink shared control channel.

3. A method for a network for a random access in in a mobile communication system, the method comprising:

receiving one or more random access preambles from one or more user equipments (UEs); and

transmitting a random access response message comprising multiple random access responses to the UEs through a downlink shared channel (DL-SCH),

wherein a size of the random access response message is not fixed,

wherein the random access response message has a format of a medium access control protocol data unit (MAC PDU) comprising multiple header parts, each of the header parts corresponding to each of the multiple random access responses,

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

wherein each of the random access responses comprises TA (Timing Advanced) information for an uplink transmission timing adjustment and uplink scheduling information identifying a resource for an uplink transmission.

4. The method of claim 3, further comprising:

transmitting control information informing of an allocation of the random access message through a downlink shared control channel.

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

a transceiver configured to transmit a random access preamble to a network, and to receive a random access response message comprising multiple random access responses from the network through a downlink shared channel (DL-SCH),

wherein a size of the random access response message is not fixed,

wherein the random access response message has a format of a medium access control protocol data unit (MAC PDU) comprising multiple header parts, each of the header parts corresponding to each of the multiple random access responses,

wherein all the header parts are in a first part of the MAC PDU and all the random access responses are in a second part of the MAC PDU subsequent to the first part, wherein each of the random access responses comprises TA (Timing Advanced) information and uplink scheduling information; and

a processor configured to process the received random access response message to adjust an uplink transmission time based on the TA information or to find A resource for an uplink transmission based on the uplink scheduling information.

6. The UE of claim 5, wherein the transceiver further receives control information informing of an allocation of the random access message through a downlink shared control channel.

7. A network device for a random access in in a mobile communication system, the device comprising:

a transceiver configured to receive one or more random access preambles from one or more user equipments (UEs), and to transmit a random access response message comprising multiple random access responses to the UEs through a downlink shared channel (DL-SCH); and

a processor configured to prepare the random access message,

a processor configured to prepare the random access response message,

wherein the random access response message has a format of a medium access control protocol data unit (MAC PDU) comprising multiple header parts, each of the header parts corresponding to each of the multiple random access responses,

wherein ad the header parts are in a first part of the MAC PDU and all the random access responses are in a second part of the MAC PDU subsequent to the first part, wherein a size of the random access message is not fixed, and

wherein each of the random access responses comprises TS (Timing Advanced) information for an uplink transmission timing adjustment and uplink scheduling information identifying a resource for an uplink transmission.

8. The device of claim 7, wherein the transceiver is configured to transmit control information informing of an allocation of the random access message through a downlink shared control channel.