Method and apparatus for supporting self-optimisation in a wireless communication system
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present disclosure provides a method for supporting self-configuration and self-optimization in a wireless communication system.
1 . A method performed by a terminal in a wireless communication system, the method comprising:
identifying a handover failure in a first cell of a first base station operating with a new radio (NR) radio access technology (RAT);
performing a first radio resource control (RRC) connection establishment with a second cell of a second base station operating with a long term evolution (LTE) RAT;
setting, in a connection failure report,
a value of time elapsed between the handover failure and the first RRC connection establishment, and
an identity of the second cell;
performing a second RRC connection establishment with a third cell of a third base station operating with the NR RAT;
receiving, from the third base station, a first message requesting the connection failure report; and
transmitting, to the third base station, a second message including the connection failure report.
2 . The method of claim 1 , wherein the identity of the second cell is set based on a global cell identity.
3 . The method of claim 1 , further comprising:
based on identifying the handover failure, setting, in the connection failure report, at least one of:
a connection failure type indicating the handover failure,
information for identifying the first cell,
information for identifying a source cell that triggers associated with a last handover being failed, or
a value of time elapsed between since an initialization of the last handover until the handover failure.
4 . The method of claim 1 , wherein further comprising:
before transmitting the second message, setting, in the connection failure report, a value of time elapsed since the handover failure.
5 . The method of claim 1 , wherein the connection failure report is delivered to the first base station.
6 . A method performed by a base station operating with a new radio (NR) radio access technology (RAT) in a wireless communication system, the method comprising:
performing a radio resource control (RRC) connection establishment with a terminal;
transmitting, to the terminal, a first message requesting a connection failure report; and
receiving, from the terminal, a second message including the connection failure report, wherein the connection failure report includes:
a value of time elapsed between a handover failure and a next time the terminal connects to a long term evolution (LTE) cell, and
an identity of the LTE cell.
7 . The method of claim 6 , wherein the identity of the LTE cell is set based on a global cell identity.
8 . The method of claim 6 , wherein the connection failure report further includes at least one of:
a connection failure type indicating the handover failure,
information for identifying a cell in which the handover failure occurs,
information for identifying a source cell that triggers associated with a last handover being failed, or
a value of time elapsed between since an initialization of the last handover until the handover failure.
9 . The method of claim 6 , wherein the connection failure report further includes a value of time elapsed from the handover failure until the terminal transmits the second message.
10 . The method of claim 6 , further comprising:
transmitting, to another base station operating a cell in which the handover failure occurs, the connection failure report.
11 . A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
identify a handover failure in a first cell of a first base station operating with a new radio (NR) radio access technology (RAT),
perform a first radio resource control (RRC) connection establishment with a second cell of a second base station operating with a long term evolution (LTE) RAT,
set, in a connection failure report,
a value of time elapsed between the handover failure and the first RRC connection establishment, and
an identity of the second cell,
perform a second RRC connection establishment with a third cell of a third base station operating with the NR RAT,
receive, from the third base station, a first message requesting the connection failure report, and
transmit, to the third base station, a second message including the connection failure report.
12 . The terminal of claim 11 , wherein the identity of the second cell is set based on a global cell identity.
13 . The terminal of claim 11 , wherein the controller is further configured to:
based on identifying the handover failure, set, in the connection failure report, at least one of:
a connection failure type indicating the handover failure,
information for identifying the first cell,
information for identifying a source cell that triggers associated with a last handover being failed, or
a value of time elapsed between since an initialization of the last handover until the handover failure.
14 . The terminal of claim 11 , wherein the controller is further configured to:
before transmitting the second message, set, in the connection failure report, a value of time elapsed since the handover failure.
15 . The terminal of claim 11 , wherein the connection failure report is delivered to the first base station.
16 . A base station operating with a new radio (NR) radio access technology (RAT) in a wireless communication system, the base station comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
perform a radio resource control (RRC) connection establishment with a terminal, transmit, to the terminal, a first message requesting a connection failure report, and receive, from the terminal, a second message including the connection failure report, wherein the connection failure report includes:
a value of time elapsed between a handover failure and a next time the terminal connects to a long term evolution (LTE) cell, and
an identity of the LTE cell.
17 . The terminal base station of claim 16 , wherein the identity of the LTE cell is set based on a global cell identity.
18 . The terminal base station of claim 16 , wherein the connection failure report further includes at least one of:
a connection failure type indicating the handover failure,
information for identifying a cell in which the handover failure occurs,
information for identifying a source cell that triggers associated with a last handover being failed, or
a value of time elapsed between since an initialization of the last handover until the handover failure.
19 . The terminal base station of claim 16 , wherein the connection failure report further includes a value of time elapsed from the handover failure until the terminal transmits the second message.
20 . The terminal base station of claim 16 , wherein the controller is further configured to:
transmit, to another base station operating a cell in which the handover failure occurs, the connection failure report.