Method and apparatus for performing initial access procedure for low cost user equipment in wireless communication system
AssigneeLG Electronics Inc.
InventorsYunjung Yi, Joonkui Ahn, Hyangsun You
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Abstract
A method and apparatus for performing an initial access procedure in a wireless communication system is provided. A low cost user equipment (UE) transmits a list of capabilities to a network, and receives a reject message from the network when at least one of the capabilities is not supported by the network. The list of capabilities may be transmitted during a random access procedure via a random access preamble on a physical random access channel (PRACH) or a message 3 on a physical uplink shared channel (PUSCH). The reject message may be received during the random access procedure a random access response or an acknowledge message for the message 3.
Claims12
A method performed by a wireless device in a wireless communication system, the method comprising:
- measuring a reference signal received power (RSRP) based on at least one reference signal received by the wireless device;
- determining an uplink coverage enhancement level based on the measured RSRP and a difference between a first maximum power and a second maximum power, wherein the first maximum power is a maximum power of the wireless device, and the second maximum power is a maximum power other than the first maximum power;
- determining a physical random access channel (PRACH) resource related to the uplink coverage enhancement level;
- and
- transmitting a PRACH preamble based on the PRACH resource to a network.
A wireless device in a wireless communication system comprising:
- a memory;
- a transceiver;
- and
- at least one processor, operatively coupled to the memory and the transceiver,
- wherein the at least one processor is configured to:
- measure a reference signal received power (RSRP) based on at least one reference signal received by the wireless device,
- determine an uplink coverage enhancement level based on the measured RSRP and a difference between a first maximum power and a second maximum power, wherein the first maximum power is a maximum power of the wireless device, and the second maximum power is a maximum power other than the first maximum power,
- determine a physical random access channel (PRACH) resource related to the uplink coverage enhancement level, and
- control the transceiver to transmit a PRACH preamble based on the PRACH resource to a network.
Dependencies are inferred from the claim text.