Method for performing random access process in wireless communication system
A method of performing a random access process in a wireless communication system includes transmitting a random access preamble, receiving a random access response including uplink radio resource allocation information for multiple transmission time intervals (TTIs) in response to the random access preamble, transmitting a radio resource control (RRC) connection request message according to the uplink radio resource allocation information, and transmitting a non-access stratum (NAS) service request message according to the uplink radio resource allocation information.
1. A method of performing a random access process in a wireless communication system, the method comprising:
transmitting, by a user equipment, a random access preamble to a base station;
receiving, by the user equipment, a random access response from the base station as a response to the random access preamble, the random access response including uplink radio resource allocation information for a radio resource control (RRC) connection request message and duration information for a non-access stratum (NAS) service request message, the duration information indicating multiple transmission time intervals (TTIs) for transmitting the NAS service request message;
transmitting the RRC connection request message according to the uplink radio resource allocation information; and
transmitting the NAS service request message by being segmented across the multiple TTIs according to the duration information.
2. The method of claim 1 , wherein the NAS service request message and the RRC connection request message are transmitted in a concatenated manner.
3. The method of claim 1 , wherein the NAS service request message is transmitted after the RRC connection request message is transmitted and after a signaling radio bearer (SRB), which is a radio bearer for transmitting control plane data, is established.
4. The method of claim 1 , wherein the multiple TTIs are a plurality of temporally continuous subframes.
5. The method of claim 1 , wherein the multiple TTIs are a plurality of temporally discontinuous subframes.
6. The method of claim 1 , further comprising receiving a contention resolution message in response to the RRC connection request message.
7. The method of claim 6 , wherein the contention resolution message is received after transmitting the NAS service request message.
8. The method of claim 1 , wherein a contention resolution message is received before transmitting the NAS service request message.