Patent Application
20220053293
The present disclosure relates to methods and apparatuses for transmitting and receiving data in wireless communication systems.
In order to meet the increasing demand with respect to wireless data traffic after the commercialization of 4th generation (4G) communication systems, efforts have been made to develop improved 5th generation (5G) communication systems or pre-5G communication systems. For this reason, 5G communication systems or pre-5G communication systems are called ‘beyond 4G network communication systems’ or ‘post long term evolution (LTE) systems’. In order to achieve a high data rate, consideration is given to implementing 5G communication systems in ultra-high frequency bands (millimeter wave (mmW)) (e.g., 60 GHz). In order to reduce the path loss of radio waves and increase a transmission distance of radio waves in ultra-high frequency bands, for 5G communication systems, technologies such as beamforming, massive multiple-input multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beamforming, and large scale antenna have been discussed. Also, in order to improve networks of systems, in 5G communication systems, development of technologies such as evolved small cell, advanced small cell, cloud radio access network (cloud RAN), ultra-dense network, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, coordinated multi-points (CoMP), and interference cancellation is underway. Furthermore, in 5G communication systems, development of an advanced coding modulation (ACM) scheme such as hybrid frequency-shift keying (FSK) and quadrature amplitude modulation (QAM) modulation (FQAM) or sliding window superposition coding (SWSC) and an enhanced network access scheme such as filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), or sparse code multiple access (SCMA), is underway.
The Internet is evolving from a human-centered connection network through which humans create and consume information to an Internet of Things (IoT) network through which distributed elements such as objects exchange and process information. Internet of Everything (IoE) technology, which is a combination of IoT technology and big data processing technology through connection with a cloud server, is also emerging. In order to implement the IoT, technology elements such as sensing technology, wired/wireless communication and network infrastructure, service interface technology, and security technology are required, and thus technology for inter-object connection, such as a sensor network, machine to machine (M2M) communication, or machine-type communication (MTC), has recently been studied. In an IoT environment, intelligent Internet technology (IT) services that collect and analyze data generated by connected objects and create new value in human life may be provided. The IoT may be applied to fields such as smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, health care, smart home appliances, and advanced medical services through convergence and integration of existing information technology (IT) and various industries.
Accordingly, various attempts have been made to apply 5G communication systems to IoT networks. For example, technology such as sensor network, M2M communication, or MTC is implemented by 5G communication technology such as beamforming, MIMO, or array antenna. The application of a cloud RAN as big data processing technology may also be considered as an example of convergence of 5G technology and IoT technology.
As described above, as various services may be provided according to the development of mobile communication systems, methods for effectively providing such services are required.
Disclosed embodiments provide apparatuses and methods capable of effectively providing services in mobile communication systems.
According to an embodiment of the present disclosure, a method, performed by a terminal, of using a location-based service includes: receiving, from a base station, a radio resource control (RRC) message including protocol information related to a location of the terminal; obtaining location-related information of the terminal based on the RRC message; and transmitting, to the base station, a response message including the location-related information, wherein the protocol information is generated by a first location management function (LMF) having a logical connection inside the base station or a second LMF located in a core network, based on request information for a location-based service received from a client server.
The protocol information may be generated by the first LMF when the terminal is RRC-connected to the base station or is in an inactive state, and generated by the second LMF when the terminal is in an idle state.
The RRC message may include an indicator corresponding to an LMF that generates the protocol information, or include the protocol information in an information element (IE) that varies according to the LMF.
The method may further include determining which LMF from among the first LMF or the second LMF generates the protocol information, based on the RRC message, wherein the response message is generated to include the indicator, or to include the protocol information in the IE.
According to an embodiment of the present disclosure, a method, performed by a base station, of providing a location-based service includes: receiving, from an access management function (AMF), request information for a location-based service; receiving protocol information on the request information from a first location management function (LMF) having a logical connection inside the base station; transmitting an RRC message to a terminal based on the protocol information; receiving, from the terminal, a response message including location-related information of the terminal, based on the RRC message; and transmitting the response message to the AMF.
The request information may include identification information on the terminal, or information on the base station to which the terminal connects.
The RRC message may include an indicator corresponding to the first LMF, or include the protocol information in an information element (IE) corresponding to the first LMF.
According to an embodiment of the present disclosure, a terminal for using a location-based service includes: a transceiver; and at least one processor connected to the transceiver and configured to receive, from a base station, a radio resource control (RRC) message including protocol information related to a location of the terminal, obtain location-related information of the terminal based on the RRC message, and transmit, to the base station, a response message including the location-related information, wherein the protocol information is generated by a first location management function (LMF) having a logical connection inside the base station or a second LMF located in a core network, based on request information for a location-based service received from a client server.
The protocol information may be generated by the first LMF when the terminal is RRC-connected to the base station or is in an inactive state, and is generated by the second LMF when the terminal is in an idle state.
The RRC message may include an indicator corresponding to an LMF that generates the protocol information, or include the protocol information in an information element (IE) that varies according to the LMF.
The at least one processor may be further configured to determine which LMF from among the first LMF or the second LMF generates the protocol information, based on the RRC message, wherein the response message is generated to include the indicator, or to include the protocol information in the IE.
According to an embodiment of the present disclosure, a base station for providing a location-based service includes: a transceiver; and at least one processor connected to the transceiver and configured to receive, from an access management function (AMF), request information for a location-based service, receive protocol information for the request information from a first location management function (LMF) having a logical connection inside the base station, transmit, to a terminal, a radio resource control (RRC) message based on the protocol information, receive, from the terminal, a response message including location-related information of the terminal, based on the RRC message, and transmit the response message to the AMF.
The request information may include identification information on the terminal, or information on the base station to which the terminal connects.
Disclosed embodiments provide apparatuses and methods capable of effectively providing services in mobile communication systems.
Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. While describing the present disclosure, detailed descriptions of related well-known functions or configurations that may blur the points of the present disclosure are omitted. The terms used herein are those defined in consideration of functions in the present disclosure, but the terms may vary according to the intention of users or operators, precedents, etc. Therefore, the terms used herein have to be defined based on the meaning of the terms together with the description throughout the specification.
Hereinafter, terms for identifying access nodes, terms indicating network entities, terms indicating messages, terms indicating interfaces between network entities, and terms indicating various identification information used herein are exemplified for convenience of explanation. Accordingly, the present disclosure is not limited to the terms described below, but other terms indicating objects having equal technical meanings may be used.
Hereinafter, some terms and names defined in the 3rd generation partnership project long term evolution (3GPP LTE) standard may be used for convenience of explanation. However, the present disclosure may not be limited to the terms and names, and may also be applied to systems following other standards.
The advantages and features of the present disclosure and methods of achieving them will become apparent with reference to embodiments of the present disclosure described in detail below along with the attached drawings. The present disclosure may, however, be embodied in many different forms and should not be construed as limited to embodiments of the present disclosure set forth herein; rather these embodiments of the present disclosure are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to one of ordinary skill in the art, and the scope of the present disclosure is defined only by the accompanying claims. In the specification, the same reference numerals denote the same elements.
It will be understood that each block of flowchart illustrations and combinations of blocks in the flowchart illustrations may be implemented by computer program instructions. Because these computer program instructions may be loaded into a processor of a general-purpose computer, special purpose computer, or other programmable data processing equipment, the instructions, which are executed via the processor of the computer or other programmable data processing equipment generate means for implementing the functions specified in the flowchart block(s). Because these computer program instructions may also be stored in a computer-executable or computer-readable memory that may direct a computer or other programmable data processing equipment to function in a particular manner, the instructions stored in the computer-executable or computer-readable memory may produce a manufactured article including instruction means that implement the functions specified in the flowchart block(s). Because the computer program instructions may also be loaded onto a computer or other programmable data processing equipment, a series of operational steps may be performed on the computer or other programmable data processing equipment to produce a computer-executable process, and thus the instructions executed on the computer or other programmable data processing equipment may provide steps for implementing the functions specified in the flowchart block(s).
Also, each block may represent a module, segment, or portion of code, which includes one or more executable instructions for implementing specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of the order shown. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, according to the functionality involved.
The term “˜ unit” used in the present embodiment refers to a software or hardware component, such as a field-programmable gate array (FPGA) or an application-specific integrated circuit (ASIC), which performs certain tasks. However, “˜ unit” does not mean to be limited to software or hardware. The term “˜ unit” may be configured to be in an addressable storage medium or may be configured to operate one or more processors. Thus, “˜ unit” may include, by way of example, components, such as software components, object-oriented software components, class components, and task components, processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functionality provided in components and “˜ units” may be combined into fewer components and “˜ units” or further separated into additional components and “˜ units”. Furthermore, components and “˜ units” may be implemented to operate one or more central processing units (CPUs) in a device or a secure multimedia card. Also, a unit in an embodiment may include one or more processors.
While describing the present disclosure, detailed descriptions of related well-known functions or configurations that may blur the points of the present disclosure are omitted. Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
Hereinafter, terms for identifying access nodes, terms indicating network entities, terms indicating messages, terms indicating interfaces between network entities, and terms indicating various identification information used herein are exemplified for convenience of explanation. Accordingly, the present disclosure is not limited to the terms described below, but other terms indicating objects having equal technical meanings may be used. For example, hereinafter, a terminal may refer to a medium access control (MAC) entity in the terminal existing for each master cell group (MCG) or secondary cell group (SCG).
Hereinafter, some terms and names defined in the 3rd generation partnership project long term evolution (3GPP LTE) standard may be used for convenience of explanation. However, the present disclosure may not be limited to the terms and names, and may also be applied to systems following other standards.
Hereinafter, a base station is an entity performing resource allocation for a terminal and may include at least one of a gNode B, an eNode B, a node B, a base station (BS), a radio access unit, a base station controller, and a node on a network. A terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing a communication function. However, the present disclosure is not limited to the above examples.
In particular, the present disclosure may be applied to 3GPP NR (5G mobile communication standard). Also, the present disclosure may be applied to intelligent services based on 5G communication technology and Internet of Things (IoT)-related technology (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security, and safety-related services). In the present disclosure, an eNB may be interchangeably used with a gNB for convenience of explanation. That is, a base station described as an eNB may refer to a gNB. Also, the term “terminal” may refer to other wireless communication devices as well as mobile phones, NB-IoT devices, and sensors.
A wireless communication system has developed beyond the initially provided voice-based service into a broadband wireless communication system that provides a high speed and high quality packet data service, using communication standards such as high-speed packet access (HSPA) of 3rd generation partnership project (3GPP), long term evolution (LTE) or evolved universal terrestrial radio access (E-UTRA), LTE-advanced (LTE-A), LTE-Pro, high-rate packet data (HRPD) of 3GPP2, ultra-mobile broadband (UMB), and 802.16e of Institute of Electrical and Electronics Engineers (IEEE).
An LTE system, which is a representative example of a broadband wireless communication system, employs an orthogonal frequency division multiplexing (OFDM) scheme for a downlink (DL), and employs a single carrier frequency division multiple access (SC-FDMA) scheme for an uplink (UL). The uplink is a radio link through which a terminal (e.g., a user equipment (UE) or a mobile station (MS)) transmits data or a control signal to a base station (e.g., an eNode B or a base station (BS)), and the downlink is a radio link through which the base station transmits data or a control signal to the terminal. In the multiple access scheme, time-frequency resources for carrying data or control information are allocated and operated in a manner to prevent overlapping of the resources, i.e., to establish orthogonality between users so as to identify data or control information of each user.
As future communication systems after LTE, 5G communication systems should be able to freely reflect various requirements of users and service providers, and thus services simultaneously satisfying the various requirements should be supported. Services considered for 5G communication systems include enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low-latency communication (URLLC).
According to some embodiments, eMBB may aim to provide a higher data rate than a data rate supported by LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, eMBB should be able to provide a peak data rate of 20 gigabits per second (Gbps) in a downlink and a peak data rate of 10 Gbps in an uplink with respect to one base station. Furthermore, the 5G communication system should be able to provide an increased user-perceived data rate of a terminal while providing the peak data rate. In order to satisfy such requirements, in the 5G communication system, various transmission and reception technologies including a further enhanced MIMO transmission technology must be improved. Furthermore, an LTE system transmits a signal by using a maximum transmission bandwidth of 20 megahertz (MHz) in a frequency band of 2 gigahertz (GHz). In contrast, the 5G communication system transmits a signal by using a frequency bandwidth wider than 20 MHz in a frequency band of 3 to 6 GHz or more, and thus may satisfy the data rate requirements necessary for the 5G communication system.
Furthermore, in the 5G communication system, mMTC is considered to support application services such as Internet of Things (IoT). In order for mMTC to efficiently provide the IoT, access by many terminals within a single cell, coverage improvement of a terminal, an increased battery time, reduced costs of a terminal, etc. may be required. The IoT is attached to various sensors and various devices to provide a communication function, and thus should be able to support many terminals (e.g., 1,000,000 terminals/km2) within a cell. Furthermore, because a terminal supporting mMTC is likely to be located in a shaded area that a cell does not cover such as in the basement of a building, wider coverage than other services provided by the 5G communication system may be required. Because the terminal supporting mMTC should include a cheap terminal and it is difficult to replace a battery of the terminal frequently, a very long battery life time (e.g., 10-15 years) may be required.
Lastly, URLLC is a cellular-based wireless communication service used for mission-critical purposes, and may be used in remote control of robots or machinery, industrial automation, unmanned aerial vehicles, remote health care, emergency alert, etc. Accordingly, communication provided by URLLC may have to provide very low latency (ultra-low latency) and very high reliability (ultra-high reliability). For example, services supporting URLLC should meet an air interface latency of less than 0.5 milliseconds and simultaneously have a requirement of a packet error rate of 10−5 or less. Accordingly, for services supporting URLLC, the 5G system should provide a transmission time interval (TTI) less than that of other services, and a design for broad resource allocation in a frequency band in order to ensure the reliability of a communication link may be required.
Three services considered for the 5G communication system, that are, eMBB, URLLC, and mMTC, may be multiplexed and transmitted in one system. In this case, in order to satisfy different requirements of the services, different transmission and reception schemes and transmission/reception parameters may be used between the services. However, the mMTC, URLLC, and eMBB are examples of different service types, and service types to which the present disclosure is applied are not limited thereto.
Also, although embodiments of the present disclosure will be described based on an LTE, LTE-A, LTE Pro, or 5G (or NR, next generation mobile communication) system, the embodiments of the present disclosure may be applied to other communication systems having a similar technical background or channel type. Also, the embodiments of the present disclosure may be applied to other communication systems through some modifications without departing from the scope of the present disclosure based on a determination by one of ordinary skill in the art.
In the present disclosure, a method of adding a region-based location management function server so that a terminal distinguishes two entities respectively corresponding to a location management function server in an existing core network and the added region-based location management function server, and using different entities when necessary will be described.
According to a disclosed embodiment, in a wireless communication system, a location management function server for determining a location of a terminal is located at a radio access network end, and thus, when a base station uses a terminal location service, a latency time may be reduced.
Referring to
In
Referring to
According to some embodiments, the RLC 1b-10 or 1b-35 may reconfigure a PDCP PDU in an appropriate size and may perform an automatic repeat request (ARQ) operation or the like. The main functions of an RLC may be summarized as follows. However, the present disclosure is not limited to the following examples.
According to some embodiments, the MAC 1b-15 or 1b-30 is connected to several RLC entities configured in one terminal, and may multiplex RLC PDUs to MAC PDUs and demultiplex RLC PDUs from MAC PDUs. The main functions of a MAC may be summarized as follows. However, the present disclosure is not limited to the following examples.
According to some embodiments, a physical layer (PHY) 1b-20 or 1b-25 may channel-code and modulate higher layer data into OFDM symbols and transmit the OFDM symbols via a wireless channel, or may demodulate and channel-decode OFDM symbols received via a wireless channel and transfer the channel-decoded OFDM symbols to a higher layer. However, the present disclosure is not limited to the following examples.
Referring to
In
Also, according to some embodiments, the NR gNB may use an adaptive modulation and coding (AMC) scheme that determines a modulation scheme and a channel coding rate according to a channel state of a terminal. The NR CN 1c-05 may perform functions such as mobility support, bearer configuration, and quality of service (QoS) configuration. The NR CN 1c-05 is a device that performs various control functions as well as a mobility management function for the terminal, and may be connected to a plurality of base stations. Also, the next generation mobile communication system may interoperate with the existing LTE system, and the NR CN may be connected to an MME 1c-25 via a network interface. The MME may be connected to an eNB 1c-30 that is an existing base station.
Referring to
According to some embodiments, the main functions of the NR SDAP 1d-01 or 1d-45 may include some of the following functions. However, the present disclosure is not limited to the following examples.
With respect to an SDAP entity, a terminal may be configured, through a radio resource control (RRC) message, as to whether to use a header of the SDAP entity or a function of the SDAP entity for each PDCP entity, bearer, or logical channel. Also, when an SDAP header is configured, a 1-bit non-access stratum (NAS) reflective QoS configuration indicator and a 1-bit access stratum (AS) reflective QoS configuration indicator of the SDAP header may indicate the terminal to update or reconfigure mapping information between a QoS flow and a data bearer for an UL and a DL. According to some embodiments, the SDAP header may include QoS flow ID information indicating QoS. According to some embodiments, QoS information may be used as data processing priority and scheduling information for supporting smooth services.
According to some embodiments, the main functions of the NR PDCP 1d-05 or 1d-40 may include some of the following functions. However, the present disclosure is not limited to the following examples.
In the above description, a reordering function of an NR PDCP entity may indicate a function of reordering PDCP PDUs received from a lower layer based on PDCP sequence numbers (SNs). The reordering function of the NR PDCP entity may include a function of delivering data to a higher layer in a reordered order, a function of directly delivering data without considering the order, a function of reordering the order and recording lost PDCP PDUs, a function of reporting a state of the lost PDCP PDUs to a transmission side, and a function of requesting retransmission of the lost PDCP PDUs.
According to some embodiments, the main functions of the NR RLC 1d-10 or 1d-35 may include some of the following functions. However, the present disclosure is not limited to the following examples.
In the above description, an in-sequence delivery function of an NR RLC entity may indicate a function of in-sequence delivering RLC SDUs received from a lower layer to a higher layer. When one original RLC SDU is segmented into multiple RLC SDUs and received, the in-sequence delivery function of the NR RLC entity may include a function of reassembling the RLC SDUs and delivering the RLC SDUs.
The in-sequence delivery function of the NR RLC entity may include a function of reordering the received RLC PDUs based on RLC SNs or PDCP SNs. Also, the in-sequence delivery function of the NR RLC entity may include a function of reordering the order and recording lost PDCP PDUs, a function of reporting a state of the lost PDCP PDUs to a transmission side, and a function of requesting retransmission of the lost PDCP PDUs.
When there are the lost RLC SDUs, the in-sequence delivery function of the NR RLC entity may include a function of in-sequence delivering only RLC SDUs before the lost RLC SDU to a higher layer.
Also, when a certain timer expires although there are the lost RLC SDUs, the in-sequence delivery function of the NR RLC entity may include a function of in-sequence delivering all RLC SDUs received before the certain timer starts to a higher layer.
When a certain timer expires although there are the lost RLC SDUs, the in-sequence delivery function of the NR RLC entity may include a function of in-sequence delivering all RLC SDUs received up to now to a higher layer.
The NR RLC entity may process RLC PDUs in an order of reception regardless of an order of SNs and may deliver the processed RLC PDUs to an NR PDCP entity in an out-of sequence delivery manner.
When the NR RLC entity receives segments, the NR RLC entity may receive segments that are stored in a buffer or to be received later, may reconfigure the segments into one complete RLC PDU, and then may deliver the RLC PDU to the NR PDCP entity.
The NR RLC entity may not include a concatenation function, and the function may be performed by an NR MAC entity or may be replaced by a multiplexing function of the NR MAC entity.
In the above description, an out-of-sequence delivery function of the NR RLC entity may indicate a function of delivering RLC SDUs received from a lower layer directly to a higher layer regardless of an order. When one original RLC SDU is segmented into multiple RLC SDUs and received, the out-of-sequence delivery function of the NR RLC entity may include a function of reassembling the RLC SDUs and delivering the RLC SDUs. The out-of-sequence delivery function of the NR RLC entity may include a function of storing and ordering RLC SNs or PDCP SNs of the received RLC PDUs and recording lost RLC PDUs.
According to some embodiments, the NR MAC 1d-15 or 1d-30 may be connected to several NR RLC entities configured in one terminal, and the main functions of the NR MAC may include some of the following functions. However, the present disclosure is not limited to the following examples.
An NR PHY 1d-20 or 1d-25 may channel-code and modulate higher layer data into OFDM symbols and transmit the OFDM symbols via a wireless channel, or may demodulate OFDM symbols received via a wireless channel, channel-decode the demodulated OFDM symbols, and transfer the channel-decoded OFDM symbols to a higher layer.
Referring to
The RF processor 1e-10 may perform a function of transmitting and receiving a signal via a wireless channel, such as signal band conversion or amplification. That is, the RF processor 1e-10 may up-convert a baseband signal received from the baseband processor 1e-20 into an RF band signal and transmit the same via an antenna, and may down-convert an RF band signal received via an antenna into a baseband signal. For example, the RF processor 1e-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital-to-analog convertor (DAC), an analog-to-digital convertor (ADC), or the like. However, the present disclosure is not limited thereto. Although only one antenna is illustrated in
The baseband processor 1e-20 performs a conversion function between a baseband signal and a bit string according to the physical layer specifications of a system. For example, during data transmission, the baseband processor 1e-20 may generate complex symbols by encoding and modulating a transmitted bit string. Also, during data reception, the baseband processor 1e-20 may restore a received bit string by demodulating and decoding a baseband signal received from the RF processor 1e-10. For example, according to an OFDM scheme, during data transmission, the baseband processor 1e-20 may generate complex symbols by encoding and modulating a transmitted bit string, map the complex symbols to subcarriers, and then configure OFDM symbols through an inverse fast Fourier transform (IFFT) operation and cyclic prefix (CP) insertion. Also, during data reception, the baseband processor 1e-20 may divide a baseband signal received from the RF processor 1e-10 into units of OFDM symbols, restore signals mapped to subcarriers through a fast Fourier transform (FFT) operation, and then restore a received bit string through demodulation and decoding.
The baseband processor 1e-20 and the RF processor 1e-10 transmit and receive a signal as described above. Accordingly, the baseband processor 1e-20 and the RF processor 1e-10 may each be referred to as a transmitter, a receiver, a transceiver, or a communicator. Furthermore, at least one of the baseband processor 1e-20 or the RF processor 1e-10 may include a plurality of communication modules to support different multiple RATs. In addition, at least one of the baseband processor 1e-20 or the RF processor 1e-10 may include different communication modules to process signals of different frequency bands. For example, the different RATs may include a wireless local area network (LAN) (e.g., IEEE 802.11) and a cellular network (e.g., LTE). Also, the different frequency bands may include a super high frequency (SHF) (e.g., 2. NRHz or NRhz) band and a millimeter (mm) wave (e.g., 60 GHz) band. The terminal may transmit and receive a signal to and from a base station by using the baseband processor 1e-20 and the RF processor 1e-10, and the signal may include control information and data.
The storage 1e-30 stores data such as a basic program for an operation of the terminal, an application program, or configuration information. In particular, the storage 1e-30 may store information related to a second access node performing wireless communication by using second RAT. Also, the storage 1e-30 provides stored data according to a request from the controller 1e-40. The storage 1e-30 may include a storage medium such as a read-only memory (ROM), a random-access memory (RAM), a hard disk, a compact disc-ROM (CD-ROM), or a digital versatile disk (DVD), or a combination thereof. Also, the storage 1e-30 may include a plurality of memories.
The controller 1e-40 controls overall operations of the terminal. For example, the controller 1e-40 transmits and receives a signal via the baseband processor 1e-20 and the RF processor 1e-10. Also, the controller 1e-40 records and reads data to and from the storage 1e-30. To this end, the controller 1e-40 may include at least one processor. For example, the controller 1e-40 may include a communication processor (CP) for performing control for communication and an application processor (AP) for controlling a higher layer such as an application program. Also, at least one element in the terminal may be implemented as one chip.
Referring to
The RF processor 1f-10 may perform a function of transmitting and receiving a signal via a wireless channel, such as signal band conversion or amplification. That is, the RF processor 1f-10 up-converts a baseband signal received from the baseband processor 1f-20 into an RF band signal and transmits the same via an antenna, and down-converts an RF band signal received via an antenna into a baseband signal. For example, the RF processor 1f-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, or the like. Although only one antenna is illustrated in
The baseband processor 1f-20 performs a conversion function between a baseband signal and a bit string according to the physical layer specifications of first RAT. For example, during data transmission, the baseband processor 1f-20 may generate complex symbols by encoding and modulating a transmitted bit string. Also, during data reception, the baseband processor 1f-20 may restore a received bit string by demodulating and decoding a baseband signal received from the RF processor 1f-10. For example, according to an OFDM scheme, during data transmission, the baseband processor 1f-20 may generate complex symbols by encoding and modulating a transmitted bit string, map the complex symbols to subcarriers, and then configure OFDM symbols through an IFFT operation and CP insertion. Also, during data reception, the baseband processor 1f-20 may divide a baseband signal received from the RF processor 1f-10 into units of OFDM symbols, restore signals mapped to subcarriers through an FFT operation, and then restore a received bit string through demodulation and decoding. The baseband processor 1f-20 and the RF processor 1f-10 transmit and receive a signal as described above. Accordingly, the baseband processor 1f-20 and the RF processor 1f-10 may each be referred to as a transmitter, a receiver, a transceiver, a communicator, or a wireless communicator. The base station may transmit and receive a signal to and from a terminal by using the baseband processor 1f-20 and the RF processor 1f-10, and the signal may include control information and data.
The backhaul communicator 1f-30 provides an interface for performing communication with other nodes in a network. That is, the backhaul communicator 1f-30 may convert a bit string transmitted from a main base station to another node such as a sub-base station or a core network into a physical signal, and may convert a physical signal received from the other node into a bit string. The backhaul communicator 1f-30 may be included in a communicator.
The storage 1f-40 stores data such as a basic program for an operation of the base station, an application program, or configuration information. The storage 1f-40 may store information on a bearer allocated to a connected terminal and a measurement result reported from the connected terminal. Also, the storage 1f-40 may store information that becomes a basis of determination whether to provide or suspend multi-connections to the terminal. Also, the storage 1f-40 provides stored data according to a request from the controller 1f-50. The storage 1f-40 may include a storage medium such as a ROM, a RAM, a hard disk, a CD-ROM, or a DVD, or a combination thereof. Also, the storage 1f-40 may include a plurality of memories. According to some embodiments, the storage 1f-40 may store a program for performing a buffer state reporting method according to the present disclosure.
The controller 1f-50 controls overall operations of the base station. For example, the controller 1f-50 transmits and receives a signal via the baseband processor 1f-20 and the RF processor 1f-10 or via the backhaul communicator 1f-30. Also, the controller 1f-50 records and reads data to and from the storage 1f-40. To this end, the controller 1f-50 may include at least one processor. Also, at least one element of the base station may be implemented as one chip.
The AMF may process the NAS PDU, and may transmit the LPP message to the CN LMF. The CN LMF may receive the LPP message, and the AMF may receive a response to the LCS request. The AMF may transmit the response to the LCS request to the LCS external client which triggered the LCS request through the AMF.
When the LLMF in
In a first embodiment, regarding an operation of the NG RAN node 1k-5, when an LPP message is from the CN-LMF 1k-15, a base station may add a received NAS message (including DL LPP) to a dedicatedNAS-Message IE of RRC (indicator for DL LPP message may be included), and may transmit the same to the UE through an RRC DLInformationTransfer message. When the LLMF directly receives an LCS request from the AMF 1k-10 as in
In another embodiment, regarding an operation of the NG RAN node 1k-5, when an LPP message is from the CN-LMF 1k-15, the base station may add a received NAS message (including DL LPP) to a dedicatedNAS-Message IE of RRC (indicator for DL LPP message may be included), and may transmit the same to the UE 1k-1 through an RRC DLInformationTransfer message. When the LLMF directly receives an LCS request from the AMF 1k-10 as in
Although a name of an RRC IE including an LPP message may be different, a dedicatedNAS-Message IE may be any IE that transmits a NAS message. Also, as for localLMFInd, an indicator indicating an LPP message corresponding to a local LMF may be any indicator regardless of its name. Also, as for a localLMFLPP-Message IE, an IE that may include an LPP message corresponding to a local LMF may be any IE having such a function regardless of its name.
In the present disclosure, a method of configuring factors required to add and modify a secondary cell (Scell) for a Scell group will be described.
According to a disclosed embodiment, in a wireless communication system, as the number of Scells to be operated increases, a data size required to signal factors required for Scell addition or modification may decrease.
Referring to
In
Referring to
According to some embodiments, the RLC 2b-10 or 2b-35 may reconfigure a PDCP PDU in an appropriate size and perform an ARQ operation or the like. The main functions of an RLC may be summarized as follows. However, the present disclosure is not limited to the following examples.
According to some embodiments, the MAC 2b-15 or 2b-30 is connected to several RLC entities configured in one terminal, and may multiplex RLC PDUs to MAC PDUs and demultiplex RLC PDUs from MAC PDUs. The main functions of a MAC may be summarized as follows. However, the present disclosure is not limited to the following examples.
According to some embodiments, a physical layer (PHY) 2b-20 or 2b-25 may channel-code and modulate higher layer data into OFDM symbols and transmit the OFDM symbols via a wireless channel, or may demodulate and channel-decode OFDM symbols received via a wireless channel and transfer the channel-decoded OFDM symbols to a higher layer. However, the present disclosure is not limited to the following examples.
Referring to
In
Also, according to some embodiments, the NR gNB may use an AMC scheme that determines a modulation scheme and a channel coding rate according to a channel state of a terminal. The NR CN 2c-05 may perform functions such as mobility support, bearer configuration, and QoS configuration. The NR CN 2c-05 is a device that performs various control functions as well as a mobility management function for the terminal, and may be connected to a plurality of base stations. Also, the next generation mobile communication system may interoperate with the existing LTE system, and the NR CN may be connected to an MME 2c-25 via a network interface. The MME may be connected to an eNB 2c-30 that is an existing base station.
Referring to
According to some embodiments, the main functions of the NR SDAP 2d-01 or 2d-45 may include some of the following functions. However, the present disclosure is not limited to the following examples.
With respect to an SDAP entity, a terminal may be configured, through a radio resource control (RRC) message, as to whether to use a header of the SDAP entity or a function of the SDAP entity for each PDCP layer, bearer, or logical channel. Also, when an SDAP header is configured, a 1-bit NAS reflective QoS configuration indicator and a 1-bit AS reflective QoS configuration indicator may indicate the terminal of the SDAP header to update or reconfigure mapping information between a QoS flow and a data bearer for an UL and a DL. According to some embodiments, the SDAP header may include QoS flow ID information indicating QoS. According to some embodiments, QoS information may be used as data processing priority and scheduling information for supporting smooth services.
According to some embodiments, the main functions of the NR PDCP 2d-05 or 2d-40 may include some of the following functions. However, the present disclosure is not limited to the following examples.
In the above description, a reordering function of an NR PDCP entity may indicate a function of reordering PDCP PDUs received from a lower layer based on PDCP sequence numbers (SNs). The reordering function of the NR PDCP entity may include a function of delivering data to a higher layer in a reordered order, a function of directly delivering data without considering the order, a function of reordering the order and recording lost PDCP PDUs, a function of reporting a state of the lost PDCP PDUs to a transmission side, and requesting retransmission of the lost PDCP PDUs.
According to some embodiments, the main functions of the NR RLC 2d-10 or 2d-35 may include some of the following functions. However, the present disclosure is not limited to the following examples.
In the above description, an in-sequence delivery function of an NR RLC entity may indicate a function of in-sequence delivering RLC SDUs received from a lower layer to a higher layer. When one original RLC SDU is segmented into multiple RLC SDUs and received, the in-sequence delivery function of the NR RLC entity may include a function of reassembling the RLC SDUs and delivering the RLC SDUs.
The in-sequence delivery function of the NR RLC entity may include a function of reordering the received RLC PDUs based on RLC SNs or PDCP SNs. Also, the in-sequence delivery function of the NR RLC entity may include a function of reordering the order and recording lost PDCP PDUs, a function of reporting a state of the lost PDCP PDUs to a transmission side, and a function of requesting retransmission of the lost PDCP PDUs.
When there are the lost RLC SDUs, the in-sequence delivery function of the NR RLC entity may include a function of in-sequence delivering only RLC SDUs before the lost RLC SDUs to a higher layer.
Also, when a certain timer expires although there are the lost RLC SDUs, the in-sequence delivery function of the NR RLC entity may include a function of in-sequence delivering all RLC SDUs received before the certain timer starts to a higher layer.
When a certain timer expires although there are the lost RLC SDUs, the in-sequence delivery function of the NR RLC entity may include a function of in-sequence delivering all RLC SDUs received up to now to a higher layer.
The NR RLC entity may process RLC PDUs in an order of reception regardless of an order of SNs and may deliver the processed RLC PDUs to an NR PDCP entity in an out-of sequence delivery manner.
When the NR RLC entity receives segments, the NR RLC entity may receive segments that are stored in a buffer or to be received later, may reconfigure the segments into one complete RLC PDU, and then may deliver the RLC PDU to the NR PDCP entity.
The NR RLC entity may not include a concatenation function, and the function may be performed by an NR MAC layer or may be replaced by a multiplexing function of the NR MAC entity.
In the above description, an out-of-sequence delivery function of the NR RLC entity may indicate a function of delivering RLC SDUs received from a lower layer directly to a higher layer regardless of an order. When one original RLC SDU is segmented into multiple RLC SDUs and received, the out-of-sequence delivery function of the NR RLC entity may include a function of reassembling the RLC SDUs and delivering the RLC SDUs. The out-of-sequence delivery function of the NR RLC entity may include a function of storing and ordering RLC SNs or PDCP SNs of the received RLC PDUs and recording lost RLC PDUs.
According to some embodiments, the NR MAC 2d-15 or 2d-30 may be connected to several NR RLC entities configured in one terminal, and the main functions of the NR MAC may include some of the following functions. However, the present disclosure is not limited to the following examples.
An NR PHY 2d-20 or 2d-25 may channel-code and modulate higher layer data into OFDM symbols and transmit the OFDM symbols via a wireless channel, or may demodulate OFDM symbols received via a wireless channel, channel-decode the demodulated OFDM symbols, and transfer the channel-decoded OFDM symbols to a higher layer.
Referring to
The RF processor 2e-10 may perform a function of transmitting and receiving a signal via a wireless channel, such as signal band conversion or amplification. That is, the RF processor 2e-10 may up-convert a baseband signal received from the baseband processor 2e-20 into an RF band signal and transmit the same via an antenna, and may down-convert an RF band signal received via an antenna into a baseband signal. For example, the RF processor 2e-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital-to-analog convertor (DAC), an analog-to-digital convertor (ADC), or the like. However, the present disclosure is not limited thereto. Although only one antenna is illustrated in
The baseband processor 2e-20 performs a conversion function between a baseband signal and a bit string according to the physical layer specifications of a system. For example, during data transmission, the baseband processor 2e-20 may generate complex symbols by encoding and modulating a transmitted bit string. Also, during data reception, the baseband processor 2e-20 may restore a received bit string by demodulating and decoding a baseband signal received from the RF processor 2e-10. For example, according to an OFDM scheme, during data transmission, the baseband processor 2e-20 may generate complex symbols by encoding and modulating a transmitted bit string, map the complex symbols to subcarriers, and then configure OFDM symbols through an inverse fast Fourier transform (IFFT) operation and cyclic prefix (CP) insertion. Also, during data reception, the baseband processor 2e-20 may divide a baseband signal received from the RF processor 2e-10 into units of OFDM symbols, restore signals mapped to subcarriers, through a fast Fourier transform (FFT) operation, and then restore a received bit string through demodulation and decoding.
The baseband processor 2e-20 and the RF processor 2e-10 transmit and receive a signal as described above. Accordingly, the baseband processor 2e-20 and the RF processor 2e-10 may each be referred to as a transmitter, a receiver, a transceiver, or a communicator. Furthermore, at least one of the baseband processor 2e-20 or the RF processor 2e-10 may include a plurality of communication modules to support different multiple RATs. In addition, at least one of the baseband processor 2e-20 or the RF processor 2e-10 may include different communication modules to process signals of different frequency bands. For example, the different RATs may include a wireless LAN (e.g., IEEE 802.11) and a cellular network (e.g., LTE). Also, the different frequency bands may include a super high frequency (SHF) band (e.g., 2. NRHz, NRhz) and a millimeter (mm) wave (e.g., 60 GHz) band. The terminal may transmit and receive a signal to and from a base station by using the baseband processor 2e-20 and the RF processor 2e-10, and the signal may include control information and data.
The storage 2e-30 stores data such as a basic program for an operation of the terminal, an application program, or configuration information. In particular, the storage 2e-30 may store information related to a second access node performing wireless communication by using second RAT. Also, the storage 2e-30 provides stored data according to a request from the controller 2e-40. The storage 2e-30 may include a storage medium such as a ROM, a RAM, a hard disk, a CD-ROM, or a DVD, or a combination thereof. Also, the storage 2e-30 may include a plurality of memories.
The controller 2e-40 controls overall operations of the terminal. For example, the controller 2e-40 transmits and receives a signal via the baseband processor 2e-20 and the RF processor 2e-10. Also, the controller 2e-40 records and reads data to and from the storage 2e-30. To this end, the controller 2e-40 may include at least one processor. For example, the controller 2e-40 may include a communication processor (CP) for performing control for communication and an application processor (AP) for controlling a higher layer such as an application program. Also, at least one element in the terminal may be implemented as one chip.
Referring to
The RF processor 2f-10 may perform a function of transmitting and receiving a signal via a wireless channel, such as signal band conversion or amplification. That is, the RF processor 2f-10 may up-convert a baseband signal received from the baseband processor 2f-20 into an RF band signal and transmit the same via an antenna, and may down-convert an RF band signal received via an antenna into a baseband signal. For example, the RF processor 2f-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, or the like. Although only one antenna is illustrated in
The baseband processor 2f-20 performs a conversion function between a baseband signal and a bit string according to the physical layer specifications of first RAT. For example, during data transmission, the baseband processor 2f-20 may generate complex symbols by encoding and modulating a transmitted bit string. Also, during data reception, the baseband processor 2f-20 may restore a received bit string by demodulating and decoding a baseband signal received from the RF processor 2f-10. For example, according to an OFDM scheme, during data transmission, the baseband processor 2f-20 may generate complex symbols by encoding and modulating a transmitted bit string, map the complex symbols to subcarriers, and then configure OFDM symbols through an IFFT operation and CP insertion. Also, during data reception, the baseband processor 2f-20 may divide a baseband signal received from the RF processor 2f-10 into units of OFDM symbols, restore signals mapped to subcarriers through an FFT operation, and then restore a received bit string through demodulation and decoding. The baseband processor 2f-20 and the RF processor 2f-10 transmit and receive a signal as described above. Accordingly, the baseband processor 2f-20 and the RF processor 2f-10 may each be referred to as a transmitter, a receiver, a transceiver, a communicator, or a wireless communicator. The base station may transmit and receive a signal to and from a terminal by using the baseband processor 2f-20 and the RF processor 2f-10, and the signal may include control information and data.
The backhaul communicator 2f-30 provides an interface for performing communication with other nodes in a network. That is, the backhaul communicator 2f-30 may convert a bit string transmitted from a main base station to another node such as a sub-base station or a core network into a physical signal, and may convert a physical signal received from the other node into a bit string. The backhaul communicator 2f-30 may be included in a communicator.
The storage 2f-40 stores data such as a basic program for an operation of the base station, an application program, or configuration information. The storage 2f-40 may store information on a bearer allocated to a connected terminal and a measurement result reported from the connected terminal. Also, the storage 2f-40 may store information that becomes a basis of determination whether to provide or suspend multi-connections to the terminal. Also, the storage 2f-40 provides stored data according to a request from the controller 2f-50. The storage 2f-40 may include a storage medium such as a ROM, a RAM, a hard disk, a CD-ROM, or a DVD, or a combination thereof. Also, the storage 2f-40 may include a plurality of memories. According to some embodiments, the storage 2f-40 may store a program for executing a buffer state reporting method according to the present disclosure.
The controller 2f-50 controls overall operations of the base station. For example, the controller 2f-50 transmits and receives a signal via the baseband processor 2f-20 and the RF processor 2f-10 or via the backhaul communicator 2f-30. Also, the controller 2f-50 records and reads data to and from the storage 2f-40. To this end, the controller 2f-50 may include at least one processor. Also, at least one element of the base station may be implemented as one chip.
SCellGroupToAddMod may be a field or information element (IE) including information transmitted by the base station to add or modify a Scell. The IE may include one ScellGroupIndex, and ScellGroupIndex may be an index indicating a group to which a Scell to be added or modified belongs. ScellGroup may have SCellGroupCommonConfig that is a parameter set to be referenced during configuration of the Scell to be added or modified. The SCellGroupCommonConfig may include information such as ServingCellConfigCommon, ServingCellConfig, and SSB-MTC. The ServingCellConfigCommon may be a collection of cell specific factors of the Scell to be added or modified, and the ServingCellConfig may be a collection of UE dedicated factors of the Scell to be added or modified. The SSB-MTC is measurement timing configuration information of a synchronization signal block (SSB). In addition, ScellToAddModlist may be a list of Scells to be added or modified. ScellToAddMod may be an element of the list. The ScellToAddMod may include sCellIndex indicating an index of a Scell to be added or modified, and may include information such as ServingCellConfigCommon, ServingCellConfig, or SSB-MTC as a unit including configuration factors to be referenced for each Scell. Like a signal of a Scell group, the ServingCellConfigCommon includes cell specific common factors, the ServingCellConfig includes UE dedicated factors, and the SSB-MTC is SSB measurement timing configuration information. When the UE receives the RRCReconfiguration message including the above information, the UE adds or modifies a Scell according to configuration rules and may notify confirmation to the base station through an RRCReconfigurationComplete message.
Also, ServingCellConfig factors to be applied to the Scell corresponding to the sCellIndex in the ScellToAddModList according to an embodiment may be divided into two types of information. First information of ServingCellConfig is information indicated in the SCellToAddMod and has the following characteristics. The first information may be indicated only in the SCellAddMod. In an embodiment, the first information may be CrossCarrierSchedulingConfig, pathlossReferenceLinking, or servingCellMO. Second information of the ServingCellConfig may be second information of the ServingCellConfig indicated in the SCellToAddMod, or second information of ServingCellConfig indicated in the SCellGroupCommonConfig. In an embodiment, for the second information of the ServingCellConfig, the UE may preferentially apply the second information of the ServingCellConfig indicated in the SCellToAddMod, and regarding a factor that is not indicated, may apply the second information of the ServingCellConfig indicated in the SCellGroupCommonConfig. The second information may have the following conditions. The second information may be ServingCellConfig other than the first information.
Also, for SSB-MTC to be applied to the Scell corresponding to the sCellIndex in the ScellToAddModList, SSB-MTC existing in the SCellGroupCommonConfig or SSB-MTC existing in the SCellToAddMod may be used. In an embodiment, for SSB-MTC of a Scell to be added or modified, the UE may preferentially use the SSB-MTC existing in the SCellToAddMod, and regarding a lower field that is not indicated, may use the SSB-MTC existing in the SCellGroupCommonConfig.
When the sCellIndex is an index of a Scell that is previously configured, in the case of factors existing in the ScellToAddMod received for respective fields of the Scell, an existing value of each factor may be overwritten with a value existing in the received ScellToAddMod. Factors other than the factors existing in the received ScellToAddMod may maintain their previous values.
Also, ServingCellConfig factors to be applied to the Scell corresponding to the sCellIndex in the ScellToAddModList may be divided into two types of information, in an embodiment. First information of ServingCellConfig is information indicated in the SCellToAddMod and may have the following characteristics. The first information may be indicated only in the SCellAddMod. According to an embodiment, the first information may be CrossCarrierSchedulingConfig, pathlossReferenceLinking, or servingCellMO. Second information of the ServingCellConfig may be second information of the ServingCellConfig indicated in the SCellToAddMod or second information of ServingCellConfig indicated in the SCellGroupCommonConfig. In an embodiment, for the second information of the ServingCellConfig, the terminal may preferentially apply the second information of the ServingCellConfig indicated in the SCellToAddMod, and regarding a factor that is not indicated, may apply the second information of the ServingCellConfig indicated in the SCellGroupCommonConfig. The second information may have the following conditions. The second information may be ServingCellConfig other than the first information.
Also, for SSB-MTC to be applied to the Scell corresponding to the sCellIndex in the ScellToAddModList, the terminal may use SSB-MTC existing in the SCellGroupCommonConfig or SSB-MTC existing in the SCellToAddMod. In an embodiment, for SSB-MTC of a Scell to be added or modified, the terminal may preferentially use the SSB-MTC existing in the SCellToAddMod, and regarding a lower field that is not indicated, may use the SSB-MTC existing in the SCellGroupCommonConfig.
Methods according to the claims of the present disclosure or the embodiments described in the specification may be implemented in hardware, software, or a combination of hardware and software.
When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. The one or more programs stored in the computer-readable storage medium are configured to be executed by one or more processors in an electronic device. The one or more programs may include instructions for allowing the electronic device to execute the methods according to the claims of the present disclosure or the embodiments described in the specification.
These programs (software modules or software) may be stored in a random-access memory (RAM), a non-volatile memory including a flash memory, a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic disc storage device, a compact disc (CD)-ROM, a digital versatile disc (DVD), another optical storage device, or a magnetic cassette. Alternatively, the programs may be stored in a memory configured by combining some or all of them. Also, each constituent memory may include a plurality of memories.
Also, the programs may be stored in an attachable storage device that is accessible through a communication network, such as the Internet, an intranet, a local area network (LAN), a wide LAN (WLAN), or a storage area network (SAN), or a combination thereof. Such a storage device may connect to a device according to embodiments of the present disclosure through an external port. Also, a separate storage device on a communication network may connect to a device according to embodiments of the present disclosure.
In the afore-described embodiments of the present disclosure, elements included in the present disclosure are expressed in a singular or plural form according to the embodiments of the present disclosure. However, singular or plural expressions have been selected properly for a condition provided for convenience of description, and the present disclosure is not limited to singular or plural components. Components expressed as plural may be configured as a single component, or a component expressed as singular may be configured as plural components.
It should be understood that the embodiments of the present disclosure described herein should be considered in a descriptive sense only and not for purposes of limitation. That is, it will be understood by one of ordinary skill in the art that various changes in form and details may be made in the embodiments of the present disclosure without departing from the spirit and scope of the present disclosure. Also, the embodiments of the present disclosure may be used in combination when necessary. For example, portions of an embodiment and another embodiment of the present disclosure may be combined with each other and a base station and a terminal may be used. Also, the embodiments of the present disclosure may be applied to other communication systems, and other modifications may be made therein based on the spirit of the above embodiments.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2018-0174270 | Dec 2018 | KR | national |
This application is a 371 of International Application No. PCT/KR2019/018810 filed on Dec. 31, 2019, which claims priority to Korean Patent Application No. 10-2018-0174270 filed on Dec. 31, 2018, the disclosures of which are herein incorporated by reference in their entirety.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2019/018810 | 12/31/2019 | WO | 00 |
