TECHNICAL FIELD

The present disclosure relates to a wireless communication system. More specifically, the present disclosure relates to a method and apparatus for efficiently performing communication in a 5G communication system after 4G communication system commercialization.

BACKGROUND ART

To meet the demand for wireless data traffic having increased since deployment of 4G communication systems, efforts have been made to develop an improved 5G or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a ‘Beyond 4G Network’ or a ‘Post LTE System’. The 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60 GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, the beamforming, massive multiple-input multiple-output (MIMO), Full Dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed in 5G communication systems. In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud Radio Access Networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), reception-end interference cancellation and the like. In the 5G system, Hybrid FSK and QAM Modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as an advanced access technology have been developed.

The Internet, which is a human centered connectivity network where humans generate and consume information, is now evolving to the Internet of Things (IoT) where distributed entities, such as things, exchange and process information without human intervention. The Internet of Everything (IoE), which is a combination of the IoT technology and the Big Data processing technology through connection with a cloud server, has emerged. As technology elements, such as “sensing technology”, “wired/wireless communication and network infrastructure”, “service interface technology”, and “Security technology” have been demanded for IoT implementation, a sensor network, a Machine-to-Machine (M2M) communication, Machine Type Communication (MTC), and so forth have been recently researched. Such an IoT environment may provide intelligent Internet technology services that create a new value to human life by collecting and analyzing data generated among connected things IoT may be applied to a variety of fields including smart home, smart building, smart city, smart car or connected cars, smart grid, health care, smart appliances and advanced medical services through convergence and combination between existing Information Technology (IT) and various industrial applications.

In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as a sensor network, Machine Type Communication (MTC), and Machine-to-Machine (M2M) communication may be implemented by beamforming, MIMO, and array antennas. Application of a cloud Radio Access Network (RAN) as the above-described Big Data processing technology may also be considered to be as an example of convergence between the 5G technology and the IoT technology.

Meanwhile, a 5G communication system, that is, a future communication system after LTE, has a goal of ultra-high speed data services reaching several Gbps using a wide ultra-wideband. Furthermore, the 5G communication system has a goal of high transmission efficiency compared to the existing communication system. As described above, the beamforming technology for providing ultra-high speed data services is emerging. In order to support high transmission efficiency, active research is carried out on a method of reducing overhead of a reference signal.

DISCLOSURE OF INVENTION

Technical Problem

The present disclosure proposes an uplink channel structure in a 5G frame structure design. The present disclosure is to propose an uplink control channel structure for supporting sufficient uplink coverage.

The present disclosure is to propose a channel state information report method optimized for a channel state information subset and service according to a frequency unit for the measurement and report of channel state information and interference characteristic according to a service characteristic.

The present disclosure is to propose various methods of matching an antenna port with a synchronization signal in order to estimate a physical channel using a synchronization signal.

The present disclosure is to propose a method and apparatus for allowing services of different types to be provided within the same time-space period by adaptively supporting services of the existing type by checking whether a given type service has occurred when simultaneously providing services of different types.

Solution to Problem

In the present disclosure, a method of a base station in a communication system includes transmitting a synchronization signal to a terminal and transmitting a broadcast channel to the terminal, wherein channel estimation based on the synchronization signal is performed on the broadcast channel. The synchronization signal may be at least one of a primary synchronization signal and a secondary synchronization signal. The antenna ports of the synchronization signal and the broadcast channel may be the same.

Furthermore, a method of a terminal in a communication system includes receiving a synchronization signal from a base station, receiving a broadcast channel from the base station, and performing channel estimation on the broadcast channel based on the synchronization signal.

Furthermore, a base station of a communication system includes a transceiver unit configured to transmit and receive signals and a controller configured to control the transceiver unit to transmit a synchronization signal to a terminal and to transmit a broadcast channel to the terminal, wherein channel estimation based on the synchronization signal is performed on the broadcast channel.

Furthermore, a terminal of a communication system includes a transceiver unit configured to transmit and receive signals and a controller configured to control the transceiver unit to receive a synchronization signal from a base station and receive a broadcast channel from the base station and to control channel estimation to be performed on the broadcast channel based on the synchronization signal.

Advantageous Effects of Invention

In accordance with an embodiment of the present disclosure, a system in which uplink coverage is sufficiently supported can be configured and transmission timing of an uplink channel can be flexibly set for scheduling flexibility.

Furthermore, in accordance with an embodiment of the present disclosure, an FCR for serving a newly designed service can be designated in given time and frequency resources. Accordingly, a control channel, data and a reference signal can be efficiently transmitted.

Furthermore, in accordance with an embodiment of the present disclosure, overhead of a reference signal additionally used for operations can be minimized by providing a method of performing the operations, such as channel estimation and measurement for major physical channels and signaling for DL transmit power, using a synchronization signal.

Furthermore, in accordance with an embodiment of the present disclosure, data can be effectively transmitted using services of different types in a communication system. Specifically, transmission time latency can be reduced or at least one of frequency-time and space resources can be efficiently used.

