METHOD AND APPARATUS FOR EFFICIENTLY TRANSMITTING INFORMATION ACQUIRED BY A TERMINAL TO A BASE STATION

• US 20140023032A1
• Filed: 04/10/2012
• Published: 01/23/2014
• Est. Priority Date: 04/11/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Soeng Hun, Kim, Sang Bum
• Granted Patent: US 10,660,108 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/18 Management of setup rejection or failure

Abstract

The invention relates to a communication method for a terminal, which enables the transmission of information to a base station and which comprises the steps of: attempting random access to a first base station; creating an rlf-report including one or more pieces of information associated with the random access in the event the random access fails; connecting to one base station from among base stations including the first base station; and transmitting the rlf-report to the connected base station. According to one embodiment of the present invention, a communication method for a base station, which enables information to be received from a terminal, comprises the steps of: connecting to the terminal; and receiving an rlf-report including one or more pieces of information associated with the random access from the connected terminal when a previously-performed random access in the terminal has failed. According to the embodiments of the present invention, information including channel information is transmitted to a base station to which a terminal is initially connected even when the terminal has failed in performing random access thereto, to thus enable the efficient transmission of information, and the base station may control scheduling or the like in accordance with the information reported by the terminal, thereby enabling efficient communication.

Claims

1. A communication method of a terminal for transmitting information to a base station, the method comprising:

attempting random access to a first base station;

generating, when the random access fails, an rlf-report including at least one information related to the random access;

establishing a connection to one of base stations including the first base station; and

transmitting the rlf-report to the connected base station.

2. The method of claim 1, wherein the at least one information comprises information indicating whether the rlf-report is triggered by the random access failure, and a second information comprises information indicating whether the random access failure occurs in a PCell or an SCell, and information for determining uplink channel state of the terminal when the random access has failed.

3. The method of claim 1, wherein the transmitting of the rlf-report comprises transmitting information including an indicator notifying that the connected base station has the rlf-report.

4. The method of claim 1, wherein the generation of the rlf-report comprises receiving information indicating a time when the rlf (radio link failure) has occurred.

5. A communication method of a base station receiving information from a terminal, the method comprising:

establishing a connection with the terminal; and

receiving, when the random access performed by the terminal previously has failed, an rlf-report including at least one information related to the random access.

6. The method of claim 5, wherein the at least one information comprises information indicating whether the rlf-report is triggered by the random access failure, and a second information comprises information indicating whether the random access failure occurs in a PCell or an SCell, and information for determining uplink channel state of the terminal when the random access has failed.

7. The method of claim 5, wherein the establishing of the connection comprises receiving the information including an indicator of notifying of existence of rlf-report from the terminal.

8. The method of claim 5, wherein the rlf report comprises information indicating time when the rlf (radio link failure) has occurred.

9. A terminal capable of transmitting information to a base station, the terminal comprising:

a transceiver for communicating information with the base station; and

a controller which controls the transceiver to attempt random access to a first base station and generates, when the random access fails, an rlf-report including at least one information related to the random access,

wherein the controller controls the transceiver to establish a connection to one of base stations including the first base station and transmit the rlf-report to the connected base station.

10. The terminal of claim 9, wherein the at least one information comprises information indicating whether the rlf-report is triggered by the random access failure, and a second information comprises information indicating whether the random access failure occurs in a PCell or an SCell, and information for determining uplink channel state of the terminal when the random access has failed.

11. The terminal of claim 9, wherein the controller controls the transceiver to transmit the information including an indicator notifying that the connected base station has the rlf-report.

12. The terminal of claim 9, wherein the controller receives information indicating a time when the rlf (radio link failure) has occurred.

13. A base station capable of received information from a terminal, the base station comprising:

a transceiver which communicates information with the terminal; and

a controller which controls the transceiver to receive, when the random access performed by the terminal previously has failed, an rlf-report including at least one information related to the random access.

14. The base station of claim 13, wherein the at least one information comprises information indicating whether the rlf-report is triggered by the random access failure, and a second information comprises information indicating whether the random access failure occurs in a PCell or an SCell, and information for determining uplink channel state of the terminal when the random access has failed.

15. The base stat of claim 13, wherein the controller controls the transceiver to receive the information including an indicator of notifying of existence of rlf-report from the terminal.