ABSTRACT
Abstract
The present disclosure relates to a communication scheme for merging IoT technology with a 5G communication system supporting a data transmission rate higher than that of a 4G system, and to a system for the scheme. The present disclosure can be applied to intelligent services (for instance, smart home, smart building, smart city, smart car or connected car, heath care, digital education, retail business, security- and safety-related service and so forth) on the basis of 5G communication technology and IoT-related technology. The present invention provides a device and method for supporting paging signal processing using multi-connection in a wireless communication system.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a 371 of International Application No. PCT/KR2017/011088 filed on Sep. 29, 2017, which claims priority to Korean Patent Application No. 10-2016-0125919 filed on Sep. 29, 2016, the disclosures of which are herein incorporated by reference in their entirety.
BACKGROUND
1. Field
An embodiment of the disclosure relates to a device and method for supporting paging signal processing using multiple connections in a wireless communication system. Another embodiment of the disclosure relates to a device and method for supporting multiple connections of a terminal in a wireless communication system. Still another embodiment of the disclosure relates to a beamforming method and device when a base station function is dispersedly implemented in a wireless communication system.
2. Description of Related Art
In order to meet wireless data traffic demands that have increased after 4G communication system commercialization, efforts to develop an improved 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 LTE system.
In order to achieve a high data transmission rate, an implementation of the 5G communication system in a mmWave band (e.g., 60 GHz band) is being considered. In the 5G communication system, technologies such as beamforming, massive MIMO, Full Dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, and large scale antenna are being discussed as means to mitigate a propagation path loss in the mmWave band and increase a propagation transmission distance.
Further, the 5G communication system has developed technologies, such as an evolved small cell, an advanced small cell, a cloud Radio Access Network (RAN), an ultra-dense network, Device to Device communication (D2D), a wireless backhaul, a moving network, cooperative communication, Coordinated Multi-Points (CoMP), and received interference cancellation to improve the system network. In addition, the 5G system has developed Advanced Coding Modulation (ACM) schemes, such as Hybrid FSK and 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).
Meanwhile, the Internet has been evolved to an Internet of Things (IoT) network in which distributed components, such as objects, exchange and process information from a human-oriented connection network in which humans generate and consume information. An Internet of Everything (IoE) technology in which a big data processing technology through a connection with a cloud server or the like is combined with the IoT technology 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 research on technologies such as a sensor network, Machine-to-Machine (M2M) communication, Machine-Type Communication (MTC), and the like for connection between objects has recently been conducted. In an IoT environment, through collection and analysis of data generated in connected objects, an intelligent Internet Technology (IT) service to generate a new value for peoples' lives may be provided. The IoT may be applied to fields such as those of a smart home, a smart building, a smart city, a smart car, a connected car, a smart grid, health care, a smart home appliance, or high-tech medical services through the convergence of the conventional Information Technology (IT) and various industries.
Accordingly, various attempts to apply the 5G communication to the IoT network are made. For example, technologies, such as a sensor network, machine to machine (M2M), and machine type communication (MTC), are implemented by techniques, such as beamforming, MIMO, and an array antenna. The application of a cloud RAN as the big data processing technology may be an example of convergence of the 5G technology and the IoT technology.
SUMMARY
An aspect of the disclosure is to provide a device and method for supporting paging signal processing of a terminal in a system where 4G and 5G coexist.
An aspect of the disclosure is to provide a device and method for supporting multiple connections of a terminal in a system where 4G and 5G coexist.
An aspect of the disclosure is to provide a device and method for supporting a connection between a terminal and a base station in a system where 4G and 5G coexist. An aspect of the disclosure is to provide a device and method for supporting an RRC connection of a terminal in a system where 4G and 5G coexist.
An aspect of the disclosure is to provide a beamforming method and device when base station functions are dispersedly implemented in a wireless communication system. Further, an aspect of the disclosure is to provide a method and device for ensuring mobility of a terminal. An aspect of the disclosure is to provide a device and method for reducing a total delay time caused by a delay of a network due to a change of a serving node when base station functions are dispersedly implemented.
The technical subjects pursued in the disclosure may not be limited to the above-mentioned technical subjects, and other technical subjects which are not mentioned may be clearly understood, through the following descriptions, by those skilled in the art of the disclosure.
In order to solve the above problem, a communication method of a terminal according to an embodiment of the disclosure may include: receiving a first broadcast signal including transmission information of a second broadcast signal from a base station; receiving the second broadcast signal including transmission information of a paging signal from the base station based on the transmission information of the second broadcast signal; and receiving the paging signal from the base station based on the transmission information of the paging signal.
Receiving of the paging signal may include: transmitting a message including at least one of identification information of the terminal or paging identification information to the base station; and receiving, from the base station, the paging signal transmitted according to at least one of the identification information of the terminal or the paging identification information.
The second broadcast signal may include information on whether a paging signal for a paging area, to which the terminal belongs, is transmitted, and the paging signal may be received from the base station, in case that the paging signal is transmitted from the paging area, to which the terminal belongs.
The communication method of the terminal may further include: identifying a radio access technology (RAT), according to which the terminal desires to receive the paging signal; and receiving the paging signal from a base station included in the RAT, according to which the terminal desires to receive the paging signal.
In order to solve the above problem, a communication method of a base station according to an embodiment of the disclosure may include: transmitting a first broadcast signal including transmission information of a second broadcast signal to a terminal; transmitting the second broadcast signal including transmission information of a paging signal based on the transmission information of the second broadcast signal; and transmitting the paging signal to the terminal based on the transmission information of the paging signal.
Transmitting of the paging signal may include: receiving a message including at least one of identification information of the terminal or paging identification information from the terminal; and determining whether to transmit the paging signal to the terminal, according to at least one of the identification information of the terminal or the paging identification information, and transmitting the paging signal to the terminal.
Transmitting of the paging signal may include: receiving information for determination of a radio access technology (RAT), according to which the terminal desires to receive the paging signal, from at least one among the terminal and an entity that controls the paging signal of the terminal; and transmitting the paging signal to the terminal, in case that the base station is included in the RAT to which the terminal desires to receive the paging signal.
In order to solve the above problem, a terminal according to an embodiment of the disclosure may include: a transmission/reception unit configured to transmit or receive a signal; and a control unit configured to receive a first broadcast signal including transmission information of a second broadcast signal from a base station, receive the second broadcast signal including transmission information of a paging signal from the base station based on the transmission information of the second broadcast signal, and receive the paging signal from the base station based on the transmission information of the paging signal.
In order to solve the above problem, a base station according to an embodiment of the disclosure may include: a transmission/reception unit configured to transmit or receive a signal; and a control unit configured to transmit a first broadcast signal including transmission information of a second broadcast signal to a terminal, transmit the second broadcast signal including transmission information of a paging signal to the terminal based on the transmission information of the second broadcast signal, and transmit the paging signal to the terminal based on the transmission information of the paging signal.
According to an embodiment of the disclosure, reduction of power consumption of a terminal is provided by supporting paging transmission or reception through 4G or 5G. Reduction of a base station load or a network load is provided by supporting paging transmission or reception through 4G or 5G. Reduction of connection latency/collision of a terminal may be provided by separating connection and reconnection to radio access technology (RAT) through 4G or 5G.
According to an embodiment of the disclosure, reliability may be provided by supporting an RRC connection through 4G and 5G. Reduction of latency may be provided by supporting the RRC connection through 4G and 5G. High speed data transmission may be provided by supporting multiple connections through 4G and 5G.
According to an embodiment of the disclosure, when a serving node of a terminal is changed, reduction of a total latency time due to a latency time of a network is possible, and a data unit (DU) can also process a quick DU change by using beam feedback information.
Effects obtainable from the disclosure may not be limited to the above-mentioned effects, and other effects which are not mentioned may be clearly understood, through the following descriptions, by those skilled in the art of the disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an example of a paging channel operating in a 5G system according to an embodiment of the disclosure;
FIG. 2 is an example of a paging monitoring procedure in a 5G system according to an embodiment of the disclosure;
FIG. 3 is another example of a paging monitoring procedure in a 5G system according to an embodiment of the disclosure;
FIG. 4 is still another example of a paging monitoring procedure in a 5G system according to an embodiment of the disclosure;
FIG. 5 is still another example of a paging monitoring procedure in a 5G system according to an embodiment of the disclosure;
FIG. 6 is still another example of a paging monitoring procedure in a 5G system according to an embodiment of the disclosure;
FIG. 7 is an example of a cell-based paging area operation according to an embodiment of the disclosure;
FIG. 8 is an example of a TRP-based paging area operation according to an embodiment of the disclosure;
FIG. 9 is an example of an LTE base station-based paging area operation according to an embodiment of the disclosure;
FIG. 10 is an example of a 5G base station-based paging area operation according to an embodiment of the disclosure;
FIG. 11 is an embodiment of a paging RAT selection procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 12 is another embodiment of a paging RAT selection procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 13 is still another embodiment of a paging RAT selection procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 14 is still another embodiment of a paging RAT selection procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 15 is an embodiment of a paging RAT operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 16 is another embodiment of a paging RAT operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 17 is still another embodiment of a paging RAT operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 18 is still another embodiment of a paging RAT operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 19 is still another embodiment of a paging RAT operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 20 is an embodiment of a 5G RRC connection operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 21 is another embodiment of a 5G RRC connection operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 22 is still another embodiment of a 5G RRC connection operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 23 is still another embodiment of a 5G RRC connection operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
<figref idrefs="DRAWINGS
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a 371 of International Application No. PCT/KR2017/011088 filed on Sep. 29, 2017, which claims priority to Korean Patent Application No. 10-2016-0125919 filed on Sep. 29, 2016, the disclosures of which are herein incorporated by reference in their entirety.
BACKGROUND
1. Field
An embodiment of the disclosure relates to a device and method for supporting paging signal processing using multiple connections in a wireless communication system. Another embodiment of the disclosure relates to a device and method for supporting multiple connections of a terminal in a wireless communication system. Still another embodiment of the disclosure relates to a beamforming method and device when a base station function is dispersedly implemented in a wireless communication system.
2. Description of Related Art
In order to meet wireless data traffic demands that have increased after 4G communication system commercialization, efforts to develop an improved 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 LTE system.
In order to achieve a high data transmission rate, an implementation of the 5G communication system in a mmWave band (e.g., 60 GHz band) is being considered. In the 5G communication system, technologies such as beamforming, massive MIMO, Full Dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, and large scale antenna are being discussed as means to mitigate a propagation path loss in the mmWave band and increase a propagation transmission distance.
Further, the 5G communication system has developed technologies, such as an evolved small cell, an advanced small cell, a cloud Radio Access Network (RAN), an ultra-dense network, Device to Device communication (D2D), a wireless backhaul, a moving network, cooperative communication, Coordinated Multi-Points (CoMP), and received interference cancellation to improve the system network. In addition, the 5G system has developed Advanced Coding Modulation (ACM) schemes, such as Hybrid FSK and 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).
Meanwhile, the Internet has been evolved to an Internet of Things (IoT) network in which distributed components, such as objects, exchange and process information from a human-oriented connection network in which humans generate and consume information. An Internet of Everything (IoE) technology in which a big data processing technology through a connection with a cloud server or the like is combined with the IoT technology 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 research on technologies such as a sensor network, Machine-to-Machine (M2M) communication, Machine-Type Communication (MTC), and the like for connection between objects has recently been conducted. In an IoT environment, through collection and analysis of data generated in connected objects, an intelligent Internet Technology (IT) service to generate a new value for peoples' lives may be provided. The IoT may be applied to fields such as those of a smart home, a smart building, a smart city, a smart car, a connected car, a smart grid, health care, a smart home appliance, or high-tech medical services through the convergence of the conventional Information Technology (IT) and various industries.
Accordingly, various attempts to apply the 5G communication to the IoT network are made. For example, technologies, such as a sensor network, machine to machine (M2M), and machine type communication (MTC), are implemented by techniques, such as beamforming, MIMO, and an array antenna. The application of a cloud RAN as the big data processing technology may be an example of convergence of the 5G technology and the IoT technology.
SUMMARY
An aspect of the disclosure is to provide a device and method for supporting paging signal processing of a terminal in a system where 4G and 5G coexist.
An aspect of the disclosure is to provide a device and method for supporting multiple connections of a terminal in a system where 4G and 5G coexist.
An aspect of the disclosure is to provide a device and method for supporting a connection between a terminal and a base station in a system where 4G and 5G coexist. An aspect of the disclosure is to provide a device and method for supporting an RRC connection of a terminal in a system where 4G and 5G coexist.
An aspect of the disclosure is to provide a beamforming method and device when base station functions are dispersedly implemented in a wireless communication system. Further, an aspect of the disclosure is to provide a method and device for ensuring mobility of a terminal. An aspect of the disclosure is to provide a device and method for reducing a total delay time caused by a delay of a network due to a change of a serving node when base station functions are dispersedly implemented.
The technical subjects pursued in the disclosure may not be limited to the above-mentioned technical subjects, and other technical subjects which are not mentioned may be clearly understood, through the following descriptions, by those skilled in the art of the disclosure.
In order to solve the above problem, a communication method of a terminal according to an embodiment of the disclosure may include: receiving a first broadcast signal including transmission information of a second broadcast signal from a base station; receiving the second broadcast signal including transmission information of a paging signal from the base station based on the transmission information of the second broadcast signal; and receiving the paging signal from the base station based on the transmission information of the paging signal.
Receiving of the paging signal may include: transmitting a message including at least one of identification information of the terminal or paging identification information to the base station; and receiving, from the base station, the paging signal transmitted according to at least one of the identification information of the terminal or the paging identification information.
The second broadcast signal may include information on whether a paging signal for a paging area, to which the terminal belongs, is transmitted, and the paging signal may be received from the base station, in case that the paging signal is transmitted from the paging area, to which the terminal belongs.
The communication method of the terminal may further include: identifying a radio access technology (RAT), according to which the terminal desires to receive the paging signal; and receiving the paging signal from a base station included in the RAT, according to which the terminal desires to receive the paging signal.
In order to solve the above problem, a communication method of a base station according to an embodiment of the disclosure may include: transmitting a first broadcast signal including transmission information of a second broadcast signal to a terminal; transmitting the second broadcast signal including transmission information of a paging signal based on the transmission information of the second broadcast signal; and transmitting the paging signal to the terminal based on the transmission information of the paging signal.
Transmitting of the paging signal may include: receiving a message including at least one of identification information of the terminal or paging identification information from the terminal; and determining whether to transmit the paging signal to the terminal, according to at least one of the identification information of the terminal or the paging identification information, and transmitting the paging signal to the terminal.
Transmitting of the paging signal may include: receiving information for determination of a radio access technology (RAT), according to which the terminal desires to receive the paging signal, from at least one among the terminal and an entity that controls the paging signal of the terminal; and transmitting the paging signal to the terminal, in case that the base station is included in the RAT to which the terminal desires to receive the paging signal.
In order to solve the above problem, a terminal according to an embodiment of the disclosure may include: a transmission/reception unit configured to transmit or receive a signal; and a control unit configured to receive a first broadcast signal including transmission information of a second broadcast signal from a base station, receive the second broadcast signal including transmission information of a paging signal from the base station based on the transmission information of the second broadcast signal, and receive the paging signal from the base station based on the transmission information of the paging signal.
In order to solve the above problem, a base station according to an embodiment of the disclosure may include: a transmission/reception unit configured to transmit or receive a signal; and a control unit configured to transmit a first broadcast signal including transmission information of a second broadcast signal to a terminal, transmit the second broadcast signal including transmission information of a paging signal to the terminal based on the transmission information of the second broadcast signal, and transmit the paging signal to the terminal based on the transmission information of the paging signal.
According to an embodiment of the disclosure, reduction of power consumption of a terminal is provided by supporting paging transmission or reception through 4G or 5G. Reduction of a base station load or a network load is provided by supporting paging transmission or reception through 4G or 5G. Reduction of connection latency/collision of a terminal may be provided by separating connection and reconnection to radio access technology (RAT) through 4G or 5G.
According to an embodiment of the disclosure, reliability may be provided by supporting an RRC connection through 4G and 5G. Reduction of latency may be provided by supporting the RRC connection through 4G and 5G. High speed data transmission may be provided by supporting multiple connections through 4G and 5G.
According to an embodiment of the disclosure, when a serving node of a terminal is changed, reduction of a total latency time due to a latency time of a network is possible, and a data unit (DU) can also process a quick DU change by using beam feedback information.
Effects obtainable from the disclosure may not be limited to the above-mentioned effects, and other effects which are not mentioned may be clearly understood, through the following descriptions, by those skilled in the art of the disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an example of a paging channel operating in a 5G system according to an embodiment of the disclosure;
FIG. 2 is an example of a paging monitoring procedure in a 5G system according to an embodiment of the disclosure;
FIG. 3 is another example of a paging monitoring procedure in a 5G system according to an embodiment of the disclosure;
FIG. 4 is still another example of a paging monitoring procedure in a 5G system according to an embodiment of the disclosure;
FIG. 5 is still another example of a paging monitoring procedure in a 5G system according to an embodiment of the disclosure;
FIG. 6 is still another example of a paging monitoring procedure in a 5G system according to an embodiment of the disclosure;
FIG. 7 is an example of a cell-based paging area operation according to an embodiment of the disclosure;
FIG. 8 is an example of a TRP-based paging area operation according to an embodiment of the disclosure;
FIG. 9 is an example of an LTE base station-based paging area operation according to an embodiment of the disclosure;
FIG. 10 is an example of a 5G base station-based paging area operation according to an embodiment of the disclosure;
FIG. 11 is an embodiment of a paging RAT selection procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 12 is another embodiment of a paging RAT selection procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 13 is still another embodiment of a paging RAT selection procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 14 is still another embodiment of a paging RAT selection procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 15 is an embodiment of a paging RAT operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 16 is another embodiment of a paging RAT operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 17 is still another embodiment of a paging RAT operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 18 is still another embodiment of a paging RAT operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 19 is still another embodiment of a paging RAT operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 20 is an embodiment of a 5G RRC connection operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 21 is another embodiment of a 5G RRC connection operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 22 is still another embodiment of a 5G RRC connection operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 23 is still another embodiment of a 5G RRC connection operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 24 is still another embodiment of a 5G RRC connection operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 25 is still another embodiment of a 5G RRC connection operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 26 is still another embodiment of a 5G RRC connection operation procedure in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 27 is an embodiment of an operation procedure of triggering a 5G RRC connection in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 28 is an example of a TAI format used in 5G RRC connection triggering in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 29 is another embodiment of an operation procedure of triggering a 5G RRC connection in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 30 is still another embodiment of an operation procedure of triggering a 5G RRC connection in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 31 is still another embodiment of an operation procedure of triggering a 5G RRC connection in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 32 is still another embodiment of an operation procedure of triggering a 5G RRC connection in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 33 is still another embodiment of an operation procedure of triggering a 5G RRC connection in a 4G and 5G coexistence system according to an embodiment of the disclosure;
FIG. 34 is an example of a base station dispersion structure according to an embodiment of the disclosure;
FIG. 35 is a specific example of an LTE protocol stack-based base station dispersion structure according to an embodiment of the disclosure;
FIG. 36 is a schematic example of a beamforming and node change-related procedure in a communication system according to an embodiment of the disclosure;
FIG. 37 is a specific example of a beamforming and node change-related procedure in a communication system according to an embodiment of the disclosure;
FIG. 38 is an example of a beam training preparation procedure in a communication system according to an embodiment of the disclosure;
FIG. 39 is an example of a beam feedback and node feedback preparation procedure in a communication system according to an embodiment of the disclosure;
FIG. 40 is an example of transmission or reception of a downlink beam training signal in a communication system according to an embodiment of the disclosure;
FIG. 41 is an example of transmission or reception of an uplink beam training signal in a communication system according to an embodiment of the disclosure;
FIG. 42 is an example of a preparation procedure for data transmission/reception in a communication system according to an embodiment of the disclosure;
FIG. 43 is an example of beam feedback and node feedback in a communication system according to an embodiment of the disclosure;
FIG. 44 is an example of a data transmission/reception path switching procedure in a communication system according to an embodiment of the disclosure;
FIG. 45 to FIG. 48 are examples of a beam feedback-related timer operation procedure in a communication system according to an embodiment of the disclosure;
FIG. 49 is a block diagram illustrating a base station according to an embodiment of the disclosure; and
FIG. 50 is a block diagram illustrating a terminal according to an embodiment of the disclosure.
DETAILED DESCRIPTION
Hereinafter, embodiments of the disclosure will be described in detail with reference to the accompanying drawings. In the following description of the disclosure, a detailed description of known functions or configurations incorporated herein will be omitted when it may make the subject matter of the disclosure rather unclear. The terms which will be described below are terms defined in consideration of the functions in the disclosure, and may be different according to users, intentions of the users, or customs. Therefore, the definitions of the terms should be made based on the contents throughout the specification.
When an element is referred to as being âconnected toâ or âaccessingâ another element, the element may be connected to or access the another element directly, or there may be a third element in the middle and electrically connected. The description of âincludingâ a specific element in the specification does not exclude an element other than the specific element and represents that an additional element may be included in the implementation or the technical scope of the disclosure.
The element units shown in the embodiments of the disclosure are illustrated independently to represent different characteristic functions, but it doesn't mean that each of the element units is a separate piece of hardware or one software element unit. That is, each of the element units is listed for convenience of explanation, and at least two of the element units may configure one element unit, or one element unit may be divided into a plurality of element units to perform functions. The separate embodiments as well as the integrated embodiments of respective element units are included in the scope of the disclosure unless they depart from the essence.
Some elements are not necessary for performing essential functions in the disclosure, and may be optional elements merely to improve performance. The disclosure may be implemented including only elements essential for realizing the essence of the disclosure, except for elements used for performance improvement, and a structure including only essential elements excluding optional elements used merely for performance improvement is also included in the scope of the disclosure.
The advantages and features of the disclosure and ways to achieve them will be apparent by making reference to embodiments as described below in detail in conjunction with the accompanying drawings. However, the disclosure is not limited to the embodiments set forth below, but may be implemented in various different forms. The following embodiments are provided only to completely disclose the disclosure and inform those skilled in the art of the scope of the disclosure, and the disclosure is defined only by the scope of the appended claims. Throughout the specification, the same or like reference numerals designate the same or like elements.
Here, it will be understood that each block of the flowchart illustrations, and combinations of blocks in the flowchart illustrations, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which is executed via the processor of the computer or other programmable data processing apparatus, generate means for implementing the functions specified in the flowchart block or blocks. These computer program instructions may also be stored in a computer usable or computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer usable or computer-readable memory produce an article of manufacture including instruction means that implement the function specified in the flowchart block or blocks. The computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions that execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.
As used herein, the term â-unitâ refers to a software element or a hardware element, such as an FPGA or an ASIC, which performs a predetermined function. However, the â-unitâ does not always have a meaning limited to software or hardware. The â-unitâ may be configured either to be stored in an addressable storage medium or to execute one or more processors. Therefore, the â-unitâ includes, for example, software elements, object-oriented software elements, class elements and task elements, processes, functions, properties, procedures, sub-routines, segments of a program code, drivers, firmware, micro-codes, circuits, data, database, data structures, tables, arrays, and parameters. Elements and functions provided by the â-unitâ may be either combined into a smaller number of elements and the â-unitsâ or divided into a larger number of elements and the â-unitsâ. Moreover, elements and â-unitsâ may be implemented to reproduce one or more CPUs within a device or a security multimedia card.
Embodiment 1
(1-1) A Paging Channel, a Paging Transmission Method, and Paging Information
FIG. 1 is an example of a paging channel operating in a 5G system according to an embodiment of the disclosure.
Referring to FIG. 1 , a scenario, in which a first broadcast channel (BCH) 110 , a second BCH 120 , and a paging signal or an additional BCH (or a third BCH) 130 are transmitted, is illustrated. The first BCH 110 may be referred to as, for example, a primary BCH (PBCH) or xBCH, and the second BCH 120 may be referred to as, for example, a secondary BCH (SBCH) or an enhanced/evolved/extended BCH (eBCH), or the like.
An information block (e.g., a master information block (MIB)) may be periodically transmitted at a determined position through an xBCH 110 . For convenience of description, the case where information transmitted through the xBCH 110 is an MIB will be described as an example. The MIB may include at least one of a system frame number (SFN), a beam reference signal configuration, whether the eBCH 120 is transmitted, a transmission cycle of the eBCH 120 , a transmission position of the eBCH 120 , version information of the eBCH 120 , and paging area information of a base station transmitting the eBCH 120 . According to an embodiment of the disclosure, the MIB may include information on whether a terminal supports access for multiple connections is supported. Receiving the broadcast channel (e.g., the xBCH 110 , the bBCH 120 , etc.) by the terminal represents receiving a signal (e.g., a signal including an MIB, etc.) transmitted through the BCH ( 110 or 120 ), and, for convenience of explanation, receiving (transmitting) the BCHs
110 or 120 and receiving (transmitting) a broadcast signal transmitted through the BCHs
110 or 120 may be used in combination. For example, receiving of the eBCH 120 by the terminal may represent that the terminal receives a signal transmitted through the eBCH 120 . The term âbase stationâ and the term âcellâ may be used interchangeably.
The following [Table 1] is an example of MIB 110 information of a 5G system according to an embodiment of the disclosure.
TABLE 1
SFN
System frame number
Beam reference signal
Beam measurement reference signal
configuration
transmission information (e.g., a cycle,
a position, and the like)
Whether eBCH is
Whether eBCH is transmitted in this
transmitted
MIB cycle
eBCH transmission cycle
eBCH transmission cycle
eBCH version information
For example, when changing eBCH, version
information may be incremented by 1 (e.g.,
using wrap-around, etc.).
Paging area information
A paging area code of a base station that
transmits eBCH
Multiple connection access
Notifying of supporting multiple cell
information
connection access
The eBCH 120 may be transmitted in a cycle defined in the MIB 110 or a system, and a transmission position of the eBCH 120 may be defined in the MIB or the system. The eBCH 120 may include at least one piece of information from among a system parameter (e.g., a base station ID, etc.) necessary for accessing a cell by a terminal, radio configuration information (e.g., random access channel (RACH) configuration information, etc.), a paging signal transmission cycle, a paging signal transmission position, transmission information of the remaining system information, paging area information of a base station transmitting the eBCH 120 , and information of a paging area to which a terminal that will receive a paging signal belongs. According to an embodiment of the disclosure, the eBCH 120 may include information on whether the terminal supports access for multiple connections is supported.
The following [Table 2] is an example of eBCH information of a 5G system according to an embodiment of the disclosure.
TABLE 2
A base station ID
For example, a globally unique ID of
a base station, etc.
Radio configuration
For example, a parameter necessary
for system access, etc.
Paging signal transmission
Whether a paging signal is transmitted
indication
in an eBCH cycle may be notified.
A paging signal transmission
Information on a resource position at
position
which a paging signal is transmitted
A paging signal transmission
A paging signal transmission cycle
cycle
Paging area information
A paging area code of a base station
that transmits eBCH
Paging area-specific paging
Whether a paging signal for each paging
signal transmission
area of the system is transmitted in an
information
eBCH cycle may be notified.
Transmission information of the
Whether system information other than
remaining system information
eBCH is transmitted may be notified.
Multiple connection access
Notifying of supporting multiple cell
information
connection access
(1-2) An Embodiment of a Paging Monitoring Operation
A terminal may receive configuration information (e.g., an MIB transmitted through the xBCH 110 , etc.) and may acquire at least one of whether the eBCH 120 is transmitted, a transmission cycle of the eBCH 120 and a transmission position of the eBCH 120 , version information of the eBCH 120 , and paging area information of a base station that transmits an MIB.
When the MIB 110 indicates transmission of the eBCH 120 , the terminal may receive the eBCH 120 according to a transmission cycle of the eBCH 120 and a transmission position of the eBCH 120 . The transmission cycle of the eBCH 120 and the transmission position of the eBCH 120 may be values transmitted through the MIB 110 or values previously defined by system and known to the terminal. According to an embodiment, when version information of the eBCH 120 is used, if a version information value of the eBCH 120 is not changed, the terminal may omit reception of the eBCH 120 .
The terminal may receive, via the eBCH 120 , radio configuration information or a system parameter necessary for cell access. If information on whether remaining system information (e.g., an additional BCH 130 ) is transmitted is received via the eBCH 120 , the terminal may receive the remaining system information 130 at a transmission position of the remaining system information. The transmission position of the remaining system information 130 may be a value acquired through transmission information of the remaining system information transmitted via the eBCH 120 or a value previously defined by the system.
According to an embodiment, if the MIB 110 and/or the eBCH 120 are received, the terminal may acquire information on whether the base station supports multiple connection access via a signal transmitted via the MIB 110 and/or the eBCH 120 . When the base station supports multiple connection access of the terminal according to the information of the MIB 110 and/or the eBCH 120 , a terminal that supports the multiple connection access may perform a multiple connection access procedure via the base station. Further, a terminal that does not support multiple connection access may perform radio access technology (RAT) connection supported by the base station via the base station. As an embodiment, when the terminal supports multiple connection access via an LTE cell and a 5G cell, and the base station supports multiple connection access via the LTE cell and the 5G cell, the terminal may perform a procedure of multiple connection access to the LTE cell and the 5G cell via the base station. Another embodiment, when the terminal supports access via only the 5G cell, and the base station supports multiple connection access via the LTE cell and the 5G cell, the terminal may perform a procedure of multiple connection access to the 5G cell via the base station. As still another embodiment, when the terminal supports access via only the LTE cell, and the base station supports multiple connection access via the LTE cell and the 5G cell, the terminal may not perform a procedure of multiple connection access to the 5G cell via the base station. The terminal may perform only a procedure of multiple connection access to the LTE cell via the base station.
According to an embodiment, a terminal in an idle mode may identify paging area information of a base station when the MIB 110 and/or the eBCH 120 are received. The terminal may perform a position registration procedure on the basis of the paging area information.
According to an embodiment, when the MIB 110 and/or the eBCH 120 are received, the terminal in the idle mode may confirm via the eBCH 120 whether a paging signal is transmitted. According to an embodiment, whether the paging signal is transmitted may be indicated as a 1-bit paging signal indicator and transmitted via the eBCH 120 . Alternatively, according to an embodiment, whether the paging signal is transmitted may be indicated as information of a resource position in which the paging signal is transmitted. According to an embodiment, whether the paging signal transmission is performed may be indicated as information notifying of whether the paging signal is transmitted to each paging area supported by the system. The eBCH 120 may include at least one among information of the paging signal transmission cycle, information of the paging signal transmission position, and information of the number of paging signal transmission symbols. According to an embodiment, the terminal in an idle mode state may receive a paging signal on the basis of the paging signal transmission information acquired from the eBCH 120 . According to an embodiment, the terminal in the idle mode state may receive a paging signal on the basis of paging signal transmission information for each paging area, which is acquired from the eBCH 120 . According to an embodiment, when the eBCH 120 does not include information of the transmission cycle of the paging signal or information of the transmission position of the paging signal, the transmission cycle of the paging signal or the transmission position of the paging signal may be transferred to the terminal in advance via a dedicated signal. According to an embodiment, the paging signal may be transmitted in the same transmission format as that of the eBCH 120 or that of the additional BCH 130 . According to an embodiment, the paging signal may be transmitted in the same transmission format as that of a PDSCH. According to an embodiment, the paging signal may be transmitted to one terminal as a target. Alternatively, the paging signal may be transmitted to one or more terminals as a target. The transmission format of the paging signal may correspond to one among an MCS level, a modulation order, channel coding, the number of repetitions, and a physical channel.
(1-3) An Embodiment of a Paging Monitoring Operation in a Beamforming System
(1-3-1)
In the case of a system to which beamforming is applied, at a paging signal monitoring time, a terminal may search for a downlink beam suitable for receiving the paging signal, monitor the suitable downlink beam, and receive the eBCH 120 . Further, if a paging area has not been changed, the terminal may receive whether the paging signal is transmitted, according to indication of the eBCH 120 . The paging signal may be received at a transmission resource position indicated by the eBCH 120 or at a transmission resource position previously known to the terminal. The terminal having determined, via the paging signal, that downlink data has been pending may continuously perform an access procedure for data transmission or reception via the base station. The terminal having determined, via the paging signal, that the downlink data has not been pending may maintain the idle mode. Meanwhile, when a change in the paging area is determined, the terminal may perform a position registration procedure. The terminal may perform the position registration procedure and receive the paging signal.
(1-3-2)
In the case of the system to which beamforming is applied, when a terminal searches, at a paging signal monitoring time, for a downlink beam suitable for receiving the paging signal, if it is determined that the terminal is located in a serving cell having been connected before transition to the idle mode, the terminal may monitor the serving cell and a used downlink beam and rece
CLAIMS
Claims ( 15 )
The invention claimed is:
1. A communication method of a terminal the method comprising:
receiving, from a base station, master system information, the master system information including first transmission information on additional system information;
receiving, from the base station, the additional system information based on the first transmission information, the additional system information including second transmission information of a paging signal; and
receiving, from the base station, the paging signal based on the second transmission information.
2. The method of claim 1 , wherein the receiving of the paging signal comprises:
transmitting, to the base station, a message including at least one of identification information of the terminal or paging identification information; and
receiving, from the base station, the paging signal transmitted according to at least one of the identification information of the terminal or the paging identification information.
3. The method of claim 1 , wherein:
the additional system information includes information on whether a paging signal for a paging area, to which the terminal belongs, is transmitted; and
the receiving of the paging signal comprises receiving the paging signal from the base station, in case that the paging signal is transmitted from the paging area to which the terminal belongs.
4. The method of claim 1 , further comprising:
identifying a radio access technology (RAT), according to which the terminal desires to receive the paging signal; and
receiving the paging signal from a base station included in the RAT, according to which the terminal desires to receive the paging signal.
5. A communication method of a base station the method comprising:
transmitting, to a terminal, master system information, the master system information including first transmission information on additional system information;
transmitting, to the terminal, the additional system information based on the first transmission information, the additional system information including second transmission information of a paging signal; and
transmitting, to the terminal, the paging signal based on the second transmission information.
6. The method of claim 5 , wherein the transmitting of the paging signal comprises:
receiving a message including at least one of identification information of the terminal or paging identification information from the terminal; and
determining whether to transmit the paging signal to the terminal, according to at least one of the identification information of the terminal or the paging identification information, and transmitting the paging signal to the terminal.
7. The method of claim 5 , wherein the transmitting of the paging signal comprises:
receiving information for determination of a radio access technology (RAT), according to which the terminal desires to receive the paging signal, from at least one among the terminal and an entity that controls the paging signal of the terminal; and
transmitting the paging signal to the terminal, in case that the base station is included in the RAT to which the terminal desires to receive the paging signal.
8. A terminal, comprising:
a transceiver; and
a controller configured to:
receive, from a base station via the transceiver, master system information, the master system information including first transmission information on additional system information,
receive, from the base station via the transceiver, the additional system information based on the first transmission information, the additional system information including second transmission information of a paging signal, and
receive, from the base station via the transceiver, the paging signal based on the second transmission information.
9. The terminal of claim 8 , wherein the controller is configured to:
transmit, to the base station via the transceiver a message including at least one of identification information of the terminal or paging identification information; and
receive, from the base station via the transceiver the paging signal transmitted according to at least one of the identification information of the terminal or the paging identification information.
10. The terminal of claim 8 , wherein: the additional system information includes information on whether a paging signal for a paging area, to which the terminal belongs, is transmitted; and
the controller is configured to receive, from the base station via the transceiver, the paging signal in case that the paging signal is transmitted from the paging area to which the terminal belongs.
11. The terminal of claim 8 , wherein the controller is configured to:
determine a radio access technology (RAT), according to which the terminal desires to receive the paging signal; and
receive the paging signal, from a base station via the transceiver, included in the RAT, according to which the terminal desires to receive the paging signal.
12. A base station, comprising:
a transceiver; and
a controller configured to:
transmit, to a terminal via the transceiver, master system information, the master system information including first transmission information on additional system information,
transmit, to the terminal via the transceiver, the additional system information based on the first transmission information, the additional system information including second transmission information of a paging signal, and
transmit, to the terminal via the transceiver, the paging signal based on the second transmission information.
13. The base station of claim 12 , wherein the controller is configured to:
receive, from the terminal via the transceiver, a message including at least one of identification information of the terminal or paging identification information; and
determine whether to transmit the paging signal to the terminal, according to at least one of the identification information of the terminal or the paging identification information, and transmit the paging signal to the terminal.
14. The base station of claim 12 , wherein the controller is configured to:
receive information for determination of a radio access technology (RAT) via the transceiver according to which the terminal desires to receive the paging signal, from at least one among the terminal and an entity that controls the paging signal of the terminal; and
transmit, to the terminal via the transceiver, the paging signal in case that the base station is included in the RAT to which the terminal desires to receive the paging signal.
15. The base station of claim 12 , wherein the additional system information includes information on whether a paging signal for a paging area, to which the terminal belongs, is transmitted.
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