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 communication method of a terminal of category 0, the method comprising:
receiving a first message including system information from a base station associated with a cell;
determining whether the system information includes allowance information indicating that the terminal of category 0 is allowed to access the cell;
barring, if the system information does not include the allowance information, a selection of the cell;
transmitting, if the system information includes the allowance information, a random access preamble to the base station;
receiving a random access response (RAR) message from the base station in response to the random access preamble;
transmitting a second message for requesting an establishment of radio resource control (RRC) connection on common control channel (CCCH) to the base station in response to the RAR message; and
receiving a third message for establishing the RRC connection in response to the second message,
wherein information indicating that the CCCH is for a terminal of category 0 is transmitted with the second message to the base station, and
wherein the terminal of category 0 is characterized as having a maximum data rate of 1000 bits within a subframe.
2. The method of claim 1 , wherein the first message comprises a system information block (SIB).
3. 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.
4. 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.
5. The method of claim 1 , wherein the third message is at least one of fragmented or repeated.
6. A terminal of category 0 comprising:
a transceiver; and
a controller configured to:
control the transceiver to receive a first message including system information from a base station associated with a cell,
determine whether the system information includes allowance information indicating that the terminal of category 0 is allowed to access the cell,
bar, if the system information does not include the allowance information, a selection of the cell,
control the transceiver to transmit, if the system information includes the allowance information, a random access preamble to the base station,
control the transceiver to receive a random access response (RAR) message from the base station in response to the random access preamble,
control the transceiver to transmit a second message for requesting an establishment of radio resource control (RRC) connection on common control channel (CCCH) to the base station in response to the RAR message, and
control the transceiver to receive a third message for establishing the RRC connection in response to the second message,
wherein information indicating that the CCCH is for a terminal of category 0 is transmitted with the second message to the base station, and
wherein the terminal of category 0 is characterized as having a maximum data rate of 1000 bits within a subframe.
7. The terminal of claim 6 , wherein the first message comprises a system information block (SIB).
8. The terminal of claim 6 , 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 6 , 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.
10. The terminal of claim 6 , wherein the third message is at least one of fragmented or repeated.
11. A communication method of a base station, the method comprising:
determining whether the base station allows an access of a terminal of category 0 to a cell formed by the base station;
generating, if the base station allows the access of the terminal of category 0 to the cell, a first message including allowance information indicating that the terminal of category 0 is allowed to access the cell;
transmitting the first message to the terminal;
receiving, if system information includes the allowance information, a random access preamble from the terminal of category 0;
transmitting a random access response (RAR) message to the terminal of category 0 in response to the random access preamble;
receiving a second message for requesting an establishment of radio resource control (RRC) connection on common control channel (CCCH) from the terminal of category 0 in response to the RAR message;
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 second message;
determining whether a size of a third 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, if the size of the third message is greater than the message size allowed for the terminal of category 0, to the terminal of category 0, the third message for establishing the RRC connection as at least one of fragmented or repeated,
wherein the terminal of category 0 is characterized as having a maximum data rate of 1000 bits within a subframe.
12. The method of claim 11 , wherein the first message comprises a system information block (SIB).
13. The method of claim 11 , wherein the information indicating that the CCCH is for the terminal of category 0 is contained in a medium access control (MAC) header.
14. The method of claim 11 , 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.
15. A base station comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
determine whether the base station allows an access of a terminal of category 0 to a cell formed by the base station,
generate, if the base station allows the access of the terminal of category 0 to the cell, a first message including allowance information indicating that the terminal of category 0 is allowed to access the cell,
control the transceiver to transmit the first message to the terminal,
control the transceiver to receive, if system information includes the allowance information, a random access preamble from the terminal of category 0,
control the transceiver to transmit a random access response (RAR) message to the terminal of category 0 in response to the random access preamble,
control the transceiver to receive a second message for requesting an establishment of radio resource control (RRC) connection on common control channel (CCCH) from the terminal of category 0 in response to the RAR message,
determine 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 second message,
determine whether a size of a third message to be transmitted to the terminal of category 0 is greater than a message size allowed for the terminal of category 0, and
control the transceiver to transmit, if the size of the third message is greater than the message size allowed for the terminal of category 0, to the terminal of category 0, the third message for establishing the RRC connection as at least one of fragmented or repeated,
wherein the terminal of category 0 is characterized as having a maximum data rate of 1000 bits within a subframe.
16. The base station of claim 15 , wherein the first message comprises a system information block (SIB).
17. The base station of claim 15 , wherein the information indicating that the CCCH is for the terminal of category 0 is contained in a medium access control (MAC) header.
18. The base station of claim 15 , 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.