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KR-102963011-B1 - APPARATUS AND METHOD FOR ACCESSING NETWORK IN WIRELESS COMMUNICATION SYSTEM

KR102963011B1KR 102963011 B1KR102963011 B1KR 102963011B1KR-102963011-B1

Abstract

The present disclosure relates to a communication technique and a system for integrating a 5G communication system with IoT technology to support higher data transmission rates than those of 4G systems. The present disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security and safety-related services, etc.) based on 5G communication technology and IoT-related technology. According to various embodiments of the present disclosure, in a wireless communication system, a terminal comprises at least one transceiver and at least one processor coupled to the at least one transceiver, and the at least one processor is configured to receive system information from a cell of a base station, determine whether the cell supports NR writing based on the system information, and if the cell supports NR writing, perform a random access procedure for the cell, and the terminal performing NR writing may be configured such that at least one of the subcarrier spacing (SCS), transport block (TB) size, and bandwidth part (BWP) is limited to a specified value compared to a terminal not performing NR writing.

Inventors

  • 장재혁
  • 김성훈
  • 아닐 아기왈

Assignees

  • 삼성전자주식회사

Dates

Publication Date
20260511
Application Date
20190814

Claims (20)

  1. In a method performed by UE (user equipment) in a wireless communication system, A step of receiving information from a base station associated with a cell indicating whether the cell has been barred for a reduced capability UE; A step of setting the information that the cell is not bound for the reduced capability UE, and identifying that the UE supports a UL channel bandwidth greater than or equal to the bandwidth of the initial UL BWP for the reduced capability UE based on first setting information for the initial UL (uplink) BWP for the reduced capability UE; and Based on the above identification, the method includes the step of performing a random access procedure with the base station using the first configuration information for the initial UL BWP for the reduced capability UE and the second configuration information for the initial DL (downlink) BWP for the reduced capability UE. A method in which the first setting information and the second setting information are included in SIB1 (system information block 1) received from the base station.
  2. In claim 1, A method further comprising the step of receiving a system information block (SIB) from the base station containing information indicating whether the reduced capability UE is allowed to access a frequency for inter-frequency cell reselection.
  3. In claim 1, The step of performing the above random access procedure is: A step of transmitting to the base station a random access preamble for the random access procedure on the initial UL BWP for the reduced capability UE; and A method comprising the step of receiving a random access response for the random access procedure on the initial DL BWP for the reduced capability UE from the base station.
  4. In claim 1, Based on the above information, a step of identifying whether the cell is bound for the reduced capability UE; and A method comprising the step of further performing cell reselection for another cell on the same frequency as the barred cell when the cell is barred for the reduced capability UE.
  5. In claim 1, A method wherein the above SIB1 further comprises first information regarding an initial UL BWP for a general UE and second information regarding an initial DL BWP for the general UE.
  6. In claim 1, The step of performing the above random access procedure is: The method includes the step of transmitting message 3 for the random access procedure to the base station, The above message 3 is a method comprising a logical channel identifier for the reduced capability UE.
  7. In claim 1, A step of receiving a message from the base station inquiring about the capability of the UE; and A method further comprising the step of transmitting to the base station, as a response to the message, a response message containing information for indicating whether the UE supports reduced capability.
  8. In a wireless communication system, regarding UE (user equipment), transceiver; and It includes a controller combined with the above-mentioned transceiver, The above controller is: Receive information from a base station associated with the cell indicating whether the cell has been barred for a reduced capability UE, and The information is set such that the cell is not bound for the reduced capability UE, and based on the first setting information for the initial UL (uplink) BWP (bandwidth part) for the reduced capability UE, it is identified that the UE supports a UL channel bandwidth greater than or equal to the bandwidth of the initial UL BWP for the reduced capability UE, Based on the above identification, the system is configured to perform a random access procedure with the base station using the first configuration information for the initial UL BWP for the reduced capability UE and the second configuration information for the initial DL (downlink) BWP for the reduced capability UE. The above first setting information and the above second setting information are included in SIB1 (system information block 1) received from the base station, UE.
  9. In claim 8, The above controller is: A UE configured to receive, from the base station, a system information block (SIB) containing information indicating whether the reduced capability UE is allowed to access a frequency for inter-frequency cell reselection.
  10. In claim 8, On the initial UL BWP for the reduced capability UE, a random access preamble for the random access procedure is transmitted to the base station, and A UE receiving a random access response for the random access procedure on the initial DL BWP for the reduced capability UE from the base station.
  11. In claim 8, The above controller is: Based on the above information, identify whether the cell is bound to the reduced capability UE, and A UE configured to perform cell reselection for another cell on the same frequency as the barred cell when the cell is barred for the reduced capability UE.
  12. In claim 8, The above SIB1 further comprises first information regarding an initial UL BWP for a general UE and second information regarding an initial DL BWP for the general UE, wherein the UE.
  13. In claim 8, Message 3 for the above random access procedure is transmitted to the base station, and The above message 3 is a UE including a logical channel identifier for the reduced capability UE.
  14. In claim 8, The above controller is: Receive a message from the base station inquiring about the capabilities of the UE, and A UE configured to send a response message containing information for indicating to the base station whether the UE supports reduced capability as a response to the message.
  15. In a base station of a wireless communication system, transceiver; and It includes a controller combined with the above-mentioned transceiver, The above controller is: Transmitting information indicating that the cell associated with the above base station is not barred for a reduced capability UE (user equipment), and Based on first configuration information for an initial UL (uplink) BWP (bandwidth part) for the reduced capability UE and second configuration information for an initial DL (downlink) BWP for the reduced capability UE, it is configured to perform a random access procedure with the UE, The UL channel bandwidth of the above UE is greater than or equal to the bandwidth of the initial UL BWP for the above reduced capability UE, and A base station in which the first setting information and the second setting information are included in SIB1 (system information block 1) transmitted to the UE.
  16. In claim 15, The above controller is: A base station further configured to transmit to the UE a system information block (SIB) containing information indicating whether the reduced capability UE is allowed to access a frequency for inter-frequency cell reselection.
  17. In claim 15, On the initial UL BWP for the reduced capability UE, a random access preamble for the random access procedure is received from the UE, and A base station in which a random access response for the random access procedure on the initial DL BWP for the reduced capability UE is transmitted to the UE.
  18. In claim 15, The above SIB1 is a base station further comprising first information regarding an initial UL BWP for a general UE and second information regarding an initial DL BWP for the general UE.
  19. In claim 15, Message 3 for the above random access procedure is received from the UE, and The above message 3 is a base station containing a logical channel identifier for the above reduced capability UE.
  20. In claim 15, The above controller is: Sending a message to the above UE inquiring about the capabilities of the above UE, and A base station configured to receive, in response to the message, a response message from the above UE that includes information for indicating whether the UE supports reduced capability.

Description

Apparatus and Method for Accessing Network in Wireless Communication System The present disclosure generally relates to a wireless communication system, and more specifically to an apparatus and method for accessing a network in a wireless communication system. Efforts are being made to develop improved 5G or pre-5G communication systems to meet the increasing demand for wireless data traffic since the commercialization of 4G communication systems. For this reason, 5G or pre-5G communication systems are referred to as Beyond 4G Network communication systems or Post-LTE systems. To achieve high data transmission rates, the implementation of 5G communication systems in the mmWave band (e.g., the 60 GHz band) is being considered. To mitigate path loss and increase transmission distance in the mmWave band, technologies such as beamforming, massive MIMO, full Dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large-scale antennas are being discussed for 5G communication systems. In addition, to improve the network of the system, technologies such as advanced small cell, advanced small cell, cloud radio access network (cloud RAN), ultra-dense network, Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation are being developed in 5G communication systems. Furthermore, in 5G systems, advanced coding modulation (ACM) methods such as FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), as well as advanced access technologies such as FBMC (Filter Bank Multi Carrier), NOMA (non-orthogonal multiple access), and SCMA (sparse code multiple access) are being developed. Meanwhile, the Internet is evolving from a human-centric network where humans generate and consume information into an IoT (Internet of Things) network that processes information by exchanging it among distributed components, such as objects. IoE (Internet of Everything) technology, which combines IoT with Big Data processing technologies through connections with cloud servers, is also emerging. To implement IoT, technological elements such as sensing technology, wired and wireless communication and network infrastructure, service interface technology, and security technology are required; consequently, technologies such as sensor networks, Machine-to-Machine (M2M) communication, and Machine-Type Communication (MTC) are currently being researched to facilitate the connection of objects. In an IoT environment, intelligent IT services that create new value for human life by collecting and analyzing data generated from connected objects can be provided. Through the convergence and integration of existing IT technologies with various industries, IoT can be applied to fields such as smart homes, smart buildings, smart cities, smart or connected cars, smart grids, healthcare, smart home appliances, and advanced medical services. Accordingly, various attempts are being made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, Machine to Machine (M2M), and Machine Type Communication (MTC) are being implemented using 5G communication techniques such as beamforming, MIMO, and array antennas. The application of cloud RAN as a big data processing technology, as previously described, can also be considered an example of the convergence of 5G and IoT technologies. In NR communication systems, measures to reduce the complexity of channel access and communication execution are being discussed for terminals implemented at low cost. FIG. 1a illustrates an example of a wireless communication system according to various embodiments of the present disclosure. FIG. 1b illustrates an example of a wireless protocol structure in a wireless communication system according to various embodiments of the present disclosure. FIG. 2a illustrates another example of a wireless communication system according to various embodiments of the present disclosure. FIG. 2b illustrates another example of a wireless protocol structure of a wireless communication system according to various embodiments of the present disclosure. FIG. 3 illustrates an example of a downlink and uplink channel frame structure when performing beam-based communication in a wireless communication system according to various embodiments of the present disclosure. FIG. 4 illustrates an example of a random access procedure in a wireless communication system according to various embodiments of the present disclosure. FIG. 5 illustrates examples of bandwidth part (BWP) operation in a wireless communication system according to various embodiments of the present disclosure. FIG. 6 illustrates an example of an initial connection procedure of an NR light terminal in a wireless communication system according to various embodiments of the present disclosure. FIG. 7 illustrates an example of a random access procedure of an NR light term