DATA TRANSMISSION METHOD AND USER EQUIPMENT FOR THE SAME

• US 20130195060A1
• Filed: 03/13/2013
• Published: 08/01/2013
• Est. Priority Date: 08/11/2008
• Status: Active Grant

• Current Assignee: EQUO IP LLC
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: PARK, Sung Jun, YI, Seung June, LEE, Young Dae, CHUN, Sung Duck
• Granted Patent: US 9,532,336 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 2101/622 Layer-2 addresses, e.g. medium access control [MAC] addresses
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• 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 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• 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

Abstract

A mobile communication technology, and, more particularly, a method for efficiently transmitting data stored in a message 3 (Msg3) buffer and a user equipment for the same is disclosed. The method of transmitting data by a user equipment in uplink includes receiving an uplink (UP) Grant signal from a base station on a specific message, determining whether there is data stored in a message 3 (Msg3) buffer when receiving the UL Grant signal on the specific message, determining whether the specific message is a random access response message, and transmitting the data stored in the Msg3 buffer to the base station using the UL Grant signal received on the specific message, if there is data stored in the Msg3 buffer when receiving the UL Grant signal on the specific message and the specific message is the random access response message.

Claims

1. A method of transmitting data by a user equipment through an uplink, the method comprising:

receiving an uplink grant (UL Grant) signal from a base station on a random access response message;

determining whether there is data stored in a message 3 (Msg3) buffer and whether the UL Grant signal was received on the random access response message; and

transmitting the data stored in the Msg3 buffer to the base station using the UL Grant signal received on the random access response message, if there is data stored in the Msg3 buffer and if the UL Grant signal was received on the random access response message.

2. The method according to claim 1, further comprising:

transmitting new data to the base station in correspondence with the UL Grant signal, if the UL Grant signal is not received on the random access response message.

3. The method according to claim 1, further comprising:

receiving another UL Grant signal on a physical downlink control channel (PDCCH); and

transmitting new data to the base station in correspondence with the another UL Grant signal.

4. The method according to claim 2, wherein the transmitting the new data to the base station includes:

acquiring a Medium Access Control Protocol Data Unit (MAC PDU) from a multiplexing and assembly entity; and

transmitting the MAC PDU to the base station.

5. The method according to claim 3, wherein the transmitting the new data to the base station includes:

acquiring a Medium Access Control Protocol Data Unit (MAC PDU) from a multiplexing and assembly entity; and

transmitting the MAC PDU to the base station.

6. The method according to claim 3,

wherein the another UL Grant signal is received on the PDCCH related to one of Cell-Radio Network Temporary Identifier (RNTI) and Temporary Cell-RNTI.

7. The method according to claim 1, wherein the data stored in the Msg3 buffer is a Medium Access Control Protocol Data Unit (MAC PDU) including a user equipment identifier.

8. The method according to claim 7, wherein the data stored in the Msg3 buffer further includes information about a buffer status report (BSR) if the user equipment starts a random access procedure for the BSR.

9. A user equipment comprising:

a reception module adapted to receive an uplink grant (UL Grant) signal from a base station on a random access response message;

a transmission module adapted to transmit data to the base station using the UL Grant signal received on the random access response message;

a message 3 (Msg3) buffer adapted to store UL data to be transmitted in a random access procedure; and

a Hybrid Automatic Repeat Request (HARQ) entity adapted to

determine whether there is data stored in the Msg3 buffer and whether the UL Grant signal was received on the random access response message,

acquire the data stored in the Msg3 buffer if there is data stored in the Msg3 buffer and the UL Grant signal was received on the random access response message, and

control the transmission module to transmit the data stored in the Msg3 buffer to the base station using the UL Grant signal received by the reception module on the random access response message.