CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is based on and claims priority under 35 U.S.C. 119(a) of a Korean patent application number 10-2018-0091505, filed on Aug. 6, 2018, in the Korean Intellectual Property Office and a Korean patent application number 10-2018-0115279, filed on Sep. 27, 2018, in the Korean Intellectual Property Office, the disclosure of each of which is incorporated by reference herein in its entirety.

BACKGROUND

1. Field

The disclosure relates to a paging monitoring method and apparatus according to a state of a terminal in a mobile communication system. More particularly, the disclosure relates to a method and an apparatus for reporting a connection setup failure in consideration of an inactive state of a terminal in a mobile communication system.

2. Description of the Related Art

In order to meet wireless data traffic demands having increased after commercialization of 4th generation (4G) communication systems, efforts to develop an improved 5th generation (5G) communication system or a pre-5G communication system have been made. For this reason, the 5G communication system or the pre-5G communication system is called a “beyond 4G network communication system” or a “post long-term evolution (LTE) system”. In order to achieve a high data transfer rate, the implementation of the 5G communication system in a millimeter wave (mmWave band) (e.g., 60 GHz band) has been considered. In order to mitigate a propagation path loss and increase a propagation transmission distance in the mmWave band, technologies, such as beamforming, massive multiple-input multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beamforming, and large-scale antenna, are under discussion for 5G communication systems. Further, in order to improve system networks, technologies, such as an evolved small cell, an advanced small cell, a cloud radio access network (RAN), an ultra-dense network, device-to-device (D2D) communication, a wireless backhaul, a moving network, cooperative communication, coordinated multi-points (CoMP), and received interference cancellation, are under development for 5G communication systems. In addition, advanced coding modulation (ACM) schemes, such as hybrid FSK and quadrature amplitude modulation (QAM) modulation (FQAM) and sliding window superposition coding (SWSC), and advanced access technologies, such as filter bank multi carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA), are under development for 5G communication systems.

The Internet is evolving from a human-centered connectivity network where humans create and consume information into the Internet of Things (IoT) network where distributed elements, such as objects, exchange and process information. The Internet of Everything (IoE), which is implemented by combining IoT technology and big data processing technology through connection with a cloud server or the like, has emerged. In order to implement IoT, technical factors, such as a sensing technique, wired/wireless communication, network infrastructure, service interface technology, and security technology, are required, and thus, research has recently been conducted on technologies, such as a sensor network, machine-to-machine (M2M) communication, and machine-type communication (MTC), for a connection between objects. In an IoT environment, it is possible to provide intelligent Internet technology services that create a new value for human life by collecting and analyzing data generated from connected objects. Through convergence and combination between existing information technology (IT) and various industries, IoT may be applied to fields, such as smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, health care, smart appliances, and high-tech medical services.

Accordingly, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as a sensor network, M2M communication, and MTC are implemented by techniques such as beamforming, MIMO, and array antennas which are the 5G communication technology. The application of a cloud radio access network (cloud RAN) as the above-described big data processing technology may also be an example of convergence between the 5G technology and the IoT technology.

In a mobile communication system, a connection setup failure report is an operation in which, if a terminal having transitioned from an unconnected state to a connected state subsequently succeeds in accessing a network, terminal information possessed by the terminal in a state in which an initial setup attempt by the terminal has failed, is delivered to a base station, and thus the terminal transmits information used for the base station to take measures in a network stage so that a setup attempt failure is prevented from subsequently occurring.

A next-generation mobile communication system employs an inactive state as well as a connected state and an idle state, and thus a connection setup failure operation should be newly considered in relation to a setup attempt in the inactive state as well as a setup attempt in the idle state. However, in an existing system, only a setup attempt in an idle state exists, so that a connection setup failure for a new state should be defined, and thus it is necessary to include notice of the type of setup, a failure of which has occurred, in the contents of an activated report.

The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure.

SUMMARY

Aspects of the disclosure are to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below.

Accordingly, an aspect of the disclosure is to provide a method for monitoring a short message and a paging message when a terminal is in a radio resource control (RRC) idle mode or an RRC inactive mode.

Another aspect of the disclosure is to provide a method for in a next-generation mobile communication system employing an inactive state as well as a connected state and an idle state, defining a connection setup failure for a new state by newly considering a setup attempt in the inactive state as well as a setup attempt in the idle state, and giving notice of the type of setup, a failure of which has occurred, in the contents of an report activated accordingly. A network may be notified of information on how serious failures are, by using information on how many times the relevant consecutive failures have occurred. Further, in the case of multiple connection failures, different power offset values may be applied to cell selection or cell reselection, according to failure types.

Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments.

In accordance with an aspect of the disclosure, a method for processing a control signal in a wireless communication system is provided. The method includes receiving a first control signal transmitted by a base station, processing the received first control signal, and transmitting, to the base station, a second control signal generated on the basis of the processing of the received first control signal.

In accordance with an aspect of the disclosure, a method of a user equipment (UE) in a wireless communication system is provided. The method includes identifying the UE is in a camped on any cell state or a camped normally state; monitoring a short message in case that the UE is in the camped on any cell state; and monitoring a short message and a paging message in case that the UE is in the camped normally state.

In accordance with another aspect of the disclosure, a method of a base station in a wireless communication system is provided. The method includes identifying whether to transmit a short message and scheduling information for a paging message; transmitting, to a user equipment (UE), the short message on a physical downlink control channel (PDCCH) using paging radio network temporary identifier (P-RNTI) based on the identification; and transmitting, to the UE, the paging message based on the scheduling information in case that the scheduling information is identified to transmit.

In accordance with another aspect of the present disclosure, a user equipment in a wireless communication system is provided. The UE includes a transceiver; and at least one processor coupled with the transceiver, the processor is configured to: identify the UE is in a camped on any cell state or a camped normally state; monitor a short message in case that the UE is in the camped on any cell state; and monitor a short message and a paging message in case that the UE is in the camped normally state.

In accordance with another aspect of the present disclosure, a base station in a wireless communication system is provided. The base station includes a transceiver; and at least one processor coupled with the transceiver, the processor is configured to: identify whether to transmit a short message and scheduling information for a paging message; control to transceiver to transmit, to a user equipment (UE), the short message on a physical downlink control channel (PDCCH) using paging radio network temporary identifier (P-RNTI) based on the identification; and control to transceiver to transmit, to the UE, the paging message based on the scheduling information in case that the scheduling information is identified to transmit.

An embodiment enables monitoring of a short massage or a paging message, according to the state of a terminal.

Further, another embodiment enables a base station to more accurately analyze causes of failure of a connection attempt by a terminal and more accurately take measures accordingly.

Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the disclosure.

