Method and apparatus for communication in wireless mobile communication system
Methods and devices are provided in a wireless communication system. A first radio resource control (RRC) connection release message is received that includes a resume identity. A random access preamble is transmitted. A random access response including timing alignment information and an uplink grant is received. A medium access control (MAC) protocol data unit (PDU) including the uplink data and an RRC connection resume request message is transmitted. The RRC connection resume request includes the resume identity. An RRC message is received. The random access preamble is selected from a preamble group for transmitting the uplink data associated with a data radio bearer (DRB).
1 . A method performed by a terminal in a wireless communication system, the method comprising:
receiving a first radio resource control (RRC) connection release message including a resume identity;
receiving, from a base station, system information while an RRC connection is suspended based on the first RRC connection release message;
in case that uplink data associated with a data radio bearer (DRB) occurs and the system information includes an indicator indicating that the terminal is allowed to transmit the uplink data during a random access procedure, transmitting, to the base station, a random access preamble for the uplink data, wherein the random access preamble is selected from a preamble group configured for transmitting the uplink data during the random access procedure;
receiving, from the base station, a random access response including an uplink grant;
resuming a signaling radio bearer (SRB) and the DRB;
transmitting, to the base station, a medium access control (MAC) protocol data unit (PDU) based on the uplink grant, wherein the MAC PDU includes the uplink data and an RRC connection resume request message, and the RRC connection resume request message includes the resume identity; and
receiving, from the base station, a second RRC connection release message as a response to the RRC connection resume request message.
2 . The method of claim 1 ,
wherein the second RRC connection release message is received in case that the a transmission of the uplink data is successful.
3 . The method of claim 1 ,
wherein the uplink data associated with the DRB is multiplexed with the RRC connection resume request message associated with the SRB in the MAC PDU.
4 . The method of claim 1 ,
wherein a key is derived based on a next hop chaining count included in the first RRC connection release message,
wherein the uplink data is ciphered based on the key, and
wherein the RRC connection resume request message further includes a short message authentication code-integrity (MAC-I).
5 . The method of claim 1 , wherein the uplink data is transmitted to the base station without transition to an RRC connected state.
6 . A method performed by a base station in a wireless communication system, the method comprising:
broadcasting system information including an indicator indicating that a terminal is allowed to transmit uplink data associated with a data radio bearer (DRB) during a random access procedure;
receiving, from a terminal having the uplink data and having received the indicator, while a radio resource control (RRC) connection of the terminal is suspended based on a first radio resource control (RRC) connection release message including a resume identity, a random access preamble associated with the uplink data for the terminal, wherein the random access preamble is selected from a preamble group configured for transmitting the uplink data during the random access procedure;
transmitting, to the terminal, a random access response including an uplink grant;
receiving, from the terminal, a medium access control (MAC) protocol data unit (PDU) based on the uplink grant, wherein the MAC PDU includes the uplink data and an RRC connection resume request message, the RRC connection resume request message includes the resume identity, and a signaling radio bearer (SRB) and the DRB are resumed; and
transmitting, to the terminal, a second RRC connection release message as a response to the RRC connection resume request message.
7 . The method of claim 6 ,
wherein the second RRC connection release message is transmitted in case that a reception of the uplink data is successful.
8 . The method of claim 6 ,
wherein the uplink data associated with the DRB is multiplexed with the RRC connection resume request message associated with the SRB in the MAC PDU.
9 . The method of claim 6 ,
wherein a key is derived based on a next hop chaining count included in the first RRC connection release message,
wherein the uplink data is ciphered based on the key, and
wherein the RRC connection resume request message further includes a short message authentication code-integrity (MAC-I).
10 . The method of claim 6 , wherein the uplink data is transmitted to the base station without transition to an RRC connected state.
11 . A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
receive, via the transceiver, a first radio resource control (RRC) connection release message including a resume identity,
receive, from a base station, system information while an RRC connection is suspended based on the first RRC connection release message,
in case that uplink data associated with a data radio bearer (DRB) occurs and the system information includes an indicator indicating that the terminal is allowed to transmit the uplink data during a random access procedure, transmit, to the base station via the transceiver, a random access preamble for the uplink data, wherein the random access preamble is selected from a preamble group configured for transmitting the uplink data during the random access procedure,
receive, from the base station via the transceiver, a random access response including an uplink grant,
resume a signaling radio bearer (SRB) and the DRB,
transmit, to the base station via the transceiver, a medium access control (MAC) protocol data unit (PDU) based on the uplink grant, wherein the MAC PDU includes the uplink data and an RRC connection resume request message, and the RRC connection resume request message includes the resume identity, and
receive, from the base station via the transceiver, a second RRC connection release message as a response to the RRC connection resume request message.
12 . The terminal of claim 11 ,
wherein the second RRC connection release message is received in case that a transmission of the uplink data is successful.
13 . The terminal of claim 11 ,
wherein the uplink data associated with the DRB is multiplexed with the RRC connection resume request message associated with the SRB in the MAC PDU.
14 . The terminal of claim 11 ,
wherein a key is derived based on a next hop chaining count included in the first RRC connection release message,
wherein the uplink data is ciphered based on the key, and
wherein the RRC connection resume request message further includes a short message authentication code-integrity (MAC-I).
15 . The terminal of claim 11 , wherein the uplink data is transmitted to the base station without transition to an RRC connected state.
16 . A base station in a wireless communication system, the base station comprising:
a transceiver; and
a controller configured to:
broadcast, via the transceiver, system information including an indicator indicating that a terminal is allowed to transmit uplink data associated with a data radio bearer (DRB) during a random access procedure,
receive, via the transceiver from a terminal having the uplink data and having received the indicator, while a radio resource control (RRC) connection of the terminal is suspended based on a first radio resource control (RRC) connection release message including a resume identity, a random access preamble associated with the uplink data for the terminal, wherein the random access preamble is selected from a preamble group configured for transmitting the uplink data during the random access procedure,
transmit, to the terminal via the transceiver, a random access response including an uplink grant,
receive, from the terminal via the transceiver, a medium access control (MAC) protocol data unit (PDU) based on the uplink grant, wherein the MAC PDU includes the uplink data and an RRC connection resume request message, the RRC connection resume request message includes the resume identity, and a signaling radio bearer (SRB) and the DRB are resumed, and
transmit, to the terminal via the transceiver, a second RRC connection release message as a response to the RRC connection resume request message.
17 . The base station of claim 16 ,
wherein the second RRC connection release message is transmitted in case that a reception of the uplink data is successful.
18 . The base station of claim 16 ,
wherein the uplink data associated with the DRB is multiplexed with the RRC connection resume request message associated with the SRB in the MAC PDU.
19 . The base station of claim 16 ,
wherein a key is derived based on a next hop chaining count included in the first RRC connection release message,
wherein the uplink data is ciphered based on the key, and
wherein the RRC connection resume request message further includes a short message authentication code-integrity (MAC-I).
20 . The base station of claim 16 , wherein the uplink data is transmitted to the base station without transition to an RRC connected state.