Network selection and random access method and apparatus of machine-type communication user equipment in mobile communication system
A network selection, a random access method, and an apparatus of a Machine Type Communication (MTC) User Equipment (UE) for use in a Long Term Evolution (LTE) are provided. A cell selection method of an MTC terminal of the present disclosure includes receiving a message from a base station forming a cell, determining whether the message includes an MTC supportability indicator, and barring, when the message includes no MTC supportability indicator, scanning a frequency used in communication with the base station during a determined period.
1. A random access method of a terminal of category 0, the method comprising:
transmitting, if a random access response (RAR) message is received from a base station, a first message for requesting an establishment of radio resource control (RRC) connection on common control channel (CCCH);
receiving a second message for establishing the RRC connection in response to the first message,
wherein information indicating that the CCCH is for a terminal of category 0 is transmitted with the first message to the base station.
2. The method of claim 1 , wherein the information indicating that the CCCH is for the terminal of category 0 is contained in a medium access control (MAC) header.
3. The method of claim 1 , wherein the information indicating that the CCCH is for the terminal of category 0 comprises a logical channel Identifier (LCID) set to a determined value.
4. The method of claim 1 , wherein the second message is at least one of fragmented or repeated.
5. The method of claim 1 , wherein the transmitting of the first message further comprises:
receiving a third message including system information from the base station forming a cell;
determining whether the system information includes allowance information indicating that the terminal of category 0 is allowed to access the cell; and
barring, when the system information does not include the allowance information, a selection of the cell.
6. The method of claim 5 , wherein the third message comprises a system information block (SIB).
7. A terminal of category 0 comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
control the transceiver to transmit, if a random access response (RAR) message is received from a base station, a first message for requesting an establishment of radio resource control (RRC) connection to the base station on common control channel (CCCH), and
receive a second message for establishing the RRC connection in response to the first request message,
wherein information indicating that the CCCH is for the terminal of category 0 is transmitted with the first message to the base station.
8. The terminal of claim 7 , wherein the information indicating that the CCCH is for the terminal of category 0 is contained in a medium access control (MAC) header.
9. The terminal of claim 7 , wherein the information indicating that the CCCH is for a terminal of category 0 comprises a logical channel identifier (LCID) set to a determined value.
10. The terminal of claim 7 , wherein the second message is at least one of fragmented or repeated.
11. The terminal of claim 7 , wherein the controller is further configured to:
receive a third message including system information from the base station forming a cell,
determine whether the system information includes allowance information indicating that the terminal of category 0 is allowed to access the cell, and
bar, when the system information does not include the allowance information, a selection of the cell.
12. The terminal of claim 11 , wherein the third message comprises a system information block (SIB).
13. A method of performing, at a base station, a random access procedure with a terminal of category 0, the method comprising:
receiving, from a terminal, a first message for requesting an establishment of radio resource control (RRC) connection on common control channel (CCCH);
determining whether the terminal is the terminal of category 0 based on information indicating that the CCCH is for the terminal of category 0 received with the first message;
determining whether a size of a second message to be transmitted to the terminal of category 0 is greater than a message size allowed for the terminal of category 0; and
transmitting, when the size of the connection setup message is greater than the message size allowed for the terminal of category 0, to the terminal of category 0 the second message for establishing the RRC connection as at least one of fragmented or repeated.
14. The method of claim 13 , wherein the information indicating that the CCCH is for the terminal of category 0 is contained in a medium access control (MAC) header.
15. The method of claim 13 , wherein the information indicating that the CCCH is for the terminal of category 0 comprises a logical channel identifier (LCID) set to a determined value.
16. The method of claim 13 , wherein the receiving of the first message further comprises:
determining whether the base station allows an access of the terminal of category 0 to a cell formed by the base station;
generating, when the base station allows the access of the terminal of category 0 to the cell, a third message including allowance information indicating that the terminal of category 0 is allowed to access the cell; and
transmitting the third message to the terminal.
17. The method of claim 16 , wherein the third message comprises a system information block (SIB).
18. A base station comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
control the transceiver to receive, from a terminal, a first message for requesting an establishment of radio resource control (RRC) connection on common control channel (CCCH),
determine whether the terminal is a terminal of category 0 based on information indicating that the CCCH is for the terminal of category 0 received with the first message,
determine whether a size of a second message to be transmitted to the terminal of category 0 is greater than a message size allowed for the terminal of category 0, and
transmit, when the size of the connection setup message is greater than the message size allowed for the terminal of category 0, to the terminal of category 0 the second message for establishing the RRC connection as at least one of fragmented or repeated.
19. The base station of claim 18 , wherein the information indicating that the CCCH is for the terminal of category 0 in a medium access control (MAC) header.
20. The base station of claim 18 , wherein the information indicating that the CCCH is for the terminal of category 0 comprises a logical channel identifier (LCID) set to a determined value.
21. The base station of claim 18 , wherein the controller is further configured to:
determine whether the base station allows an access of the terminal of category 0 to a cell formed by the base station,
generate, when the base station allows the access of the terminal of category 0 to the cell, a third message including allowance information indicating that the terminal of category 0 is allowed to access the cell, and
transmit the third message to the terminal.
22. The base station of claim 21 , wherein the third message comprises a system information block (SIB).