CROSS-REFERENCE TO RELATED APPLICATIONS

Pursuant to 35 U.S.C. § 119 (e), this application claims the benefit of Korean Patent Application No. 10-2018-0072396, filed on Jun. 22, 2018, the contents of which are all hereby incorporated by reference herein in their entirety.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to wireless communications, and more particularly, to a method and apparatus for reporting an identifier (ID) of a specific BWP among multiple BWPs based on the measurement results per each of multiple BWPs.

Related Art

3rd generation partnership project (3GPP) long-term evolution (LTE) is a technology for enabling high-speed packet communications. Many schemes have been proposed for the LTE objective including those that aim to reduce user and provider costs, improve service quality, and expand and improve coverage and system capacity. The 3GPP LTE requires reduced cost per bit, increased service availability, flexible use of a frequency band, a simple structure, an open interface, and adequate power consumption of a terminal as an upper-level requirement.

Work has started in international telecommunication union (ITU) and 3GPP to develop requirements and specifications for new radio (NR) systems. 3GPP has to identify and develop the technology components needed for successfully standardizing the new RAT timely satisfying both the urgent market needs, and the more long-term requirements set forth by the ITU radio communication sector (ITU-R) international mobile telecommunications (IMT)-2020 process. Further, the NR should be able to use any spectrum band ranging at least up to 100 GHz that may be made available for wireless communications even in a more distant future.

The NR targets a single technical framework addressing all usage scenarios, requirements and deployment scenarios including enhanced mobile broadband (eMBB), massive machine-type-communications (mMTC), ultra-reliable and low latency communications (URLLC), etc. The NR shall be inherently forward compatible.

NR is a technology that operates on a very wideband compared with LTE. In order to support flexible broadband operation, NR has the following design principles different from LTE in terms of broadband support.The ability of the network and the user equipment (UE) to support the bandwidth may be different.The bandwidth capabilities of the downlink and uplink supported by the UE may be different.The capabilities of the bandwidths supported by each UE may differ, so that UEs supporting different bandwidths may coexist within one network frequency band.In order to reduce the power consumption of the UE, the UE may be configured with different bandwidth depending on the traffic load state of the UE, etc.

In order to satisfy the above-mentioned design principles, NR newly introduced a concept of bandwidth part (BWP) in addition to carrier aggregation (CA) of existing LTE.

SUMMARY OF THE INVENTION

Due to the nature of the newly introduced BWP in NR, different issues can arise in different scenarios. The present invention discusses issues to reporting measurement results for each BWPs.

In an aspect, a method performed by a user equipment(UE) in a wireless communication system is provided. The method includes configuring multiple bandwidth parts (BWPs) including at least one of an active bandwidth part (BWP), receiving a received signal strength indicator (RSSI) measurement configuration and/or a channel occupancy measurement configuration from the network, performing a RSSI measurement and/or a channel occupancy measurement per each of the multiple BWPs, and reporting an identifier (ID) of a specific BWP among the multiple BWPs to the network when a condition related to the RSSI measurement and/or the channel occupancy measurement of the active BWP and the specific BWP is met.

In another aspect, a UE in a wireless communication system is provided. The UE comprises a memory, a transceiver, and a processor, operably coupled to the memory and the transceiver, and configured to configure multiple BWPs including at least one of an active BWP, control the transceiver to receive a RSSI measurement configuration and/or a channel occupancy measurement configuration from the network, perform a RSSI measurement and/or a channel occupancy measurement per each of the multiple BWPs, and control the transceiver to report an ID of a specific BWP among the multiple BWPs to the network when a condition related to the RSSI measurement and/or the channel occupancy measurement of the active BWP and the specific BWP is met.

