WO2016099194A1 - Canal d'accès aléatoire ainsi que procédé et appareil de transfert de données - Google Patents

Canal d'accès aléatoire ainsi que procédé et appareil de transfert de données Download PDF

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Publication number
WO2016099194A1
WO2016099194A1 PCT/KR2015/013931 KR2015013931W WO2016099194A1 WO 2016099194 A1 WO2016099194 A1 WO 2016099194A1 KR 2015013931 W KR2015013931 W KR 2015013931W WO 2016099194 A1 WO2016099194 A1 WO 2016099194A1
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Prior art keywords
channel
transmission
random access
terminal
transmitting
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PCT/KR2015/013931
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English (en)
Korean (ko)
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문희찬
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한양대학교 산학협력단
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Priority claimed from KR1020150179822A external-priority patent/KR101870859B1/ko
Application filed by 한양대학교 산학협력단 filed Critical 한양대학교 산학협력단
Publication of WO2016099194A1 publication Critical patent/WO2016099194A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to random access channels and data transmission techniques in mobile communication systems. More specifically, the present invention relates to a method and apparatus for transmitting a random access channel (Random Access Channel) and data based on the channel quality of a downlink or uplink channel by a terminal operating in a frequency division duplex (FDD) mode.
  • a random access channel Random Access Channel
  • FDD frequency division duplex
  • the terminal may perform a random access procedure to perform communication with the base station.
  • Random access process Random Access Process
  • Method is a procedure for forming a link with the base station when the terminal does not form a link with the base station, there are a variety of methods, such as competition-based random access and non-competition-based random access.
  • the random access procedure is a process in which a terminal transmits a random access preamble to a base station through a random access channel, and the base station identifies a random access preamble of the terminal and transmits a random access response to the terminal. It is done through
  • the UE transmits the random access preamble through the random access channel as transmission of the random access channel.
  • the mobile station and the base station must perform an initial communication procedure through a random access procedure.
  • the UE may be classified into a TDD mode and an FDD mode according to a communication duplex mode.
  • the TDD mode the downlink channel and the uplink channel are configured in one frequency band in time division.
  • the FDD mode the frequency band of the downlink channel and the frequency band of the uplink channel are divided. It means the mode.
  • the frequency bands of the downlink channel and the uplink channel are formed separately at regular intervals. Therefore, the conventional random access channel is transmitted to the base station through the uplink channel.
  • the terminal since the terminal measures the channel quality for the downlink channel and transmits a random access channel in the uplink channel, it prevents power consumption of the terminal such as in a disaster situation, and wastes transmission power when efficient communication is required. There was a problem.
  • the proposed channel adaptive random access method transmits a random access channel only when a predetermined channel condition is satisfied, otherwise delays transmission of an access probe. If the channel condition is very good and waits for a random access channel, the communication distance of the terminal with the maximum transmission power can be extended. This can be very useful in situations that require communication with the outside, such as disaster communication.
  • the probe transmitted and received in the channel-adaptive random access method does not include any message, and can only grasp the existence of the terminal attempting the random access. Indeed, meaningful information transmitted through random access is not sent to the probe, but to messages sent afterwards.
  • a random access message is transmitted after an Acquisition Indication (AI) channel signal transmitted after the base station receives the access probe.
  • AI Acquisition Indication
  • the base station allocates the reverse resources after receiving the access probe.
  • the channel used at this time is a physical downlink control (PDC) channel.
  • PDC physical downlink control
  • the terminal transmits a message to be transmitted through random access.
  • the message is transmitted in the backward direction using a physical uplink shared (PUS) channel.
  • PDC physical downlink control
  • the terminal in order to transmit a channel adaptive random access channel in the FDD mode, the terminal allocates some time intervals of the downlink to a time at which the UE can transmit random access, thereby transmitting a signal transmitted on the downlink. Since the channel can be measured and random access can be transmitted in the same frequency band, a method and apparatus to which channel interactivity is applied are provided.
  • the present invention also provides a method and apparatus for improving performance of random access and extending communication distance by allowing a terminal to transmit a message including an access probe and data transmitted afterwards for some time interval in the downlink of the FDD mode. To provide.
  • the present invention for solving the above problems is a method for a user equipment to transmit a random access channel and data in a frequency division duplex (FDD) mode
  • the transmission channel is a signal for measuring the quality of the transmission channel for transmitting a random access channel
  • Receiving through measuring the quality of the transmission channel by using the signal, based on the measured quality of the transmission channel, determining whether to transmit the random access channel, the random access channel is transmitted If it is determined that the method, comprising the step of transmitting the access probe indicating the presence of the terminal during the first predetermined time interval and transmitting a message including the data over the transmission channel.
  • the present invention is a method for receiving a random access channel and data in a frequency division duplex (FDD) mode, the base station, a signal for measuring the quality of the transmission channel for transmitting the random access channel to the terminal through the transmission channel Receiving an access probe indicating the presence of a terminal transmitting a random access channel during a first predetermined time interval, and receiving a message including data over the transmission channel.
  • FDD frequency division duplex
  • the present invention is a terminal for transmitting a random access channel and data in the FDD mode, the receiver for receiving a signal for measuring the quality of the transmission channel for transmitting a random access channel through the transmission channel, by using the signal
  • the controller determines the quality of the transmission channel and determines whether to transmit the random access channel based on the measured quality of the transmission channel, and if the random access channel is transmitted, during the first preset time interval. It provides a terminal comprising a transmitting unit for transmitting an access probe indicating the presence of the terminal, and transmitting a message including data through the transmission channel.
  • the present invention is a base station for receiving a random access channel and data in the FDD mode, the control unit for generating a signal for measuring the quality of the transmission channel for transmitting the random access channel, the generated signal through the terminal through the transmission channel And a receiving unit for receiving an access probe indicating the existence of a terminal transmitting a random access channel during a first predetermined time interval, and a message including data through the transmission channel.
  • the control unit for generating a signal for measuring the quality of the transmission channel for transmitting the random access channel, the generated signal through the terminal through the transmission channel
  • a receiving unit for receiving an access probe indicating the existence of a terminal transmitting a random access channel during a first predetermined time interval, and a message including data through the transmission channel.
  • the present invention allocates some time intervals of the downlink to the time that the terminal can transmit the random access in order to transmit the channel adaptive random access channel in the FDD mode, and thereby the signal transmitted on the downlink
  • the present invention provides a method and apparatus in which channel interactivity is applied since the channel can be measured and random access can be transmitted in the same frequency band.
  • the present invention also provides a method and apparatus for improving performance of random access and extending communication distance by allowing a terminal to transmit a message including an access probe and data transmitted afterwards for some time interval in the downlink of the FDD mode. To provide.
  • FIG. 1 illustrates a signal transmission structure on an uplink RACH in a mobile communication system.
  • FIG. 2 is a diagram exemplarily illustrating a configuration of an access probe.
  • FIG. 3 is a diagram illustrating an access probe transmission process through a downlink channel of W-CDMA.
  • FIG. 4 illustrates an access probe transmission process through a high link channel of W-CDMA.
  • FIG. 5 is a flowchart illustrating a random access channel and a data transmission method according to various embodiments of the present disclosure.
  • FIG. 6 is a flowchart illustrating a message transmission method including data in LTE according to various embodiments of the present disclosure.
  • FIG. 7 illustrates a random access channel and a data transmission process through a downlink channel in LTE according to various embodiments of the present invention.
  • FIG 8 illustrates a random access channel and a data transmission process through an uplink channel in LTE according to various embodiments of the present invention.
  • FIG. 9 is a flowchart illustrating a message transmission method including data in W-CDMA according to various embodiments of the present disclosure.
  • FIG. 10 illustrates a random access channel and a data transmission process through a downlink channel in W-CDMA according to various embodiments of the present invention.
  • FIG. 11 illustrates a random access channel and a data transmission process through an uplink channel in W-CDMA according to various embodiments of the present invention.
  • FIG. 12 is a flowchart illustrating a random access channel and a data reception method by a base station according to various embodiments of the present disclosure.
  • FIG. 13 is a flowchart illustrating a random access channel and a data transmission method between a terminal and a base station according to various embodiments of the present disclosure.
  • FIG. 14 is a block diagram illustrating a structure of a terminal according to various embodiments of the present disclosure.
  • 15 is a block diagram illustrating a configuration of a base station according to various embodiments of the present disclosure.
  • 16 is a block diagram illustrating a configuration of a user terminal according to various embodiments of the present disclosure.
  • the MTC terminal may mean a terminal supporting low cost (or low complexity) or a terminal supporting coverage enhancement.
  • the MTC terminal may mean a terminal defined in a specific category for supporting low cost (or low complexity) and / or coverage enhancement.
  • the MTC terminal may mean a newly defined 3GPP Release-13 low cost (or low complexity) UE category / type for performing LTE-based MTC related operations.
  • the MTC terminal supports enhanced coverage compared to the existing LTE coverage, or supports UE category / type defined in the existing 3GPP Release-12 or lower, or newly defined Release-13 low cost (or lower power consumption).
  • low complexity can mean UE category / type.
  • the mobile communication system in the present invention is widely deployed to provide various communication services such as voice, packet data, and the like.
  • the mobile communication system includes a user equipment (UE) and a base station (base station, BS, or eNB).
  • a user terminal in the present specification is a generic concept that means a terminal in wireless communication, W-CDMA, UE (User Equipment) in LTE, HSPA, etc., as well as MS (Mobile Station), UT (User Terminal) in GSM It should be interpreted as a concept including a subscriber station (SS), a wireless device, and the like.
  • a base station or a cell generally refers to a station that communicates with a user terminal, and includes a Node-B, an evolved Node-B, an Sector, a Site, and a BTS.
  • Other terms such as a base transceiver system, an access point, a relay node, a remote radio head (RRH), a radio unit (RU), and a small cell may be called.
  • RRH remote radio head
  • RU radio unit
  • a base station or a cell is a generic term representing some area or function that covers a base station controller (BSC) in CDMA, a Node B in W-CDMA, an eNB or a sector (site) in LTE, and the like. It should be interpreted as meaning and includes all the various coverage areas such as mega cell, macro cell, micro cell, pico cell, femto cell and relay node, RRH, RU, small cell communication range.
  • the base station may be interpreted in two senses. i) a device providing a mega cell, a macro cell, a micro cell, a pico cell, a femto cell, a small cell with respect to the wireless area, or ii) the wireless area itself. In i) all devices that provide a given wireless area are controlled by the same entity or all devices interacting to configure the wireless area collaboratively are directed to the base station.
  • the base station may indicate the radio area itself that receives or transmits a signal from a viewpoint of a user terminal or a neighboring base station.
  • a mega cell, a macro cell, a micro cell, a pico cell, a femto cell, a small cell, an RRH, an antenna, an RU, a low power node (LPN), a point, an eNB, a transmission / reception point, a transmission point, and a reception point are collectively referred to as a base station.
  • LPN low power node
  • the user terminal and the base station are used in a comprehensive sense as two transmitting and receiving entities used to implement the technology or technical idea described herein, and are not limited by the terms or words specifically referred to.
  • the user terminal and the base station are two types of uplink or downlink transmitting / receiving subjects used to implement the technology or the technical idea described in the present invention, and are used in a generic sense and are not limited by the terms or words specifically referred to.
  • the uplink Uplink, UL, or uplink
  • the downlink Downlink, DL, or downlink
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDM-FDMA OFDM-TDMA
  • OFDM-CDMA OFDM-CDMA
  • One embodiment of the present invention can be applied to resource allocation in the fields of asynchronous mobile communication evolving to LTE and LTE-advanced through GSM, WCDMA, HSPA, and synchronous wireless communication evolving to CDMA, DMA-2000 and UMB.
  • the present invention should not be construed as being limited or limited to a specific mobile communication field, but should be interpreted as including all technical fields to which the spirit of the present invention can be applied.
  • the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.
  • TDD time division duplex
  • FDD frequency division duplex
  • a standard is configured by configuring uplink and downlink based on one carrier or a pair of carriers.
  • the uplink and the downlink include a Physical Downlink Control CHannel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), a Physical Uplink Control CHannel (PUCCH), an Enhanced Physical Downlink Control CHannel (EPDCCH), and the like.
  • Control information is transmitted through the same control channel, and data is configured by a data channel such as a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH).
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • control information may also be transmitted using an enhanced PDCCH (EPDCCH or extended PDCCH).
  • EPDCCH enhanced PDCCH
  • extended PDCCH extended PDCCH
  • a cell means a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.
  • a mobile communication system to which embodiments are applied includes a coordinated multi-point transmission / reception system (CoMP system) or a coordinated multi-antenna transmission scheme in which two or more transmission / reception points cooperate to transmit a signal.
  • CoMP system coordinated multi-point transmission / reception system
  • antenna transmission system antenna transmission system
  • cooperative multi-cell communication system The CoMP system may include at least two multiple transmission / reception points and terminals.
  • the multiple transmit / receive point is at least one having a base station or a macro cell (hereinafter referred to as an 'eNB') and a high transmit power or a low transmit power in a macro cell region that is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • downlink refers to a communication or communication path from a multiple transmission / reception point to a terminal
  • uplink refers to a communication or communication path from a terminal to multiple transmission / reception points.
  • a transmitter may be part of multiple transmission / reception points, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.
  • a description of transmitting or receiving a PDCCH or transmitting or receiving a signal through the PDCCH may be used as a meaning including transmitting or receiving an EPDCCH or transmitting or receiving a signal through the EPDCCH.
  • the physical downlink control channel described below may mean PDCCH or EPDCCH, and may also be used to include both PDCCH and EPDCCH.
  • the EPDCCH which is an embodiment of the present invention, may be applied to the portion described as the PDCCH, and the EPDCCH may be applied to the portion described as the EPDCCH as an embodiment of the present invention.
  • the eNB performs downlink transmission to the terminals.
  • the eNB includes downlink control information and an uplink data channel (eg, a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and scheduling required to receive the PDSCH.
  • a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) may be transmitted.
  • PUSCH physical uplink shared channel
  • a terminal may mean a remote station or a remote node
  • a base station may mean a host station or a host node.
  • a host node represents a node transmitting a signal through a forward link (downlink)
  • a remote node represents a node transmitting a signal through a reverse link (uplink).
  • the downlink channel and the uplink channel described below may mean a frequency band of each link channel. That is, the frequency band in which the base station is configured to transmit a signal or a message to the terminal in the FDD mode is described as a downlink or a downlink channel or a frequency band of the downlink channel. Similarly, in the FDD mode, a frequency band in which a terminal is configured to transmit a signal or a message to a base station is described as an uplink or an uplink channel or a frequency band of an uplink channel.
  • the present invention relates to a random access channel transmission technology in a mobile communication system, and can be applied to all mobile communication systems and communication terminals in a frequency division duplex (FDD) scheme.
  • FDD frequency division duplex
  • the present invention can be widely applied to a mobile communication system using frequency division duplex.
  • it can be used to extend the coverage radius of the terminal having the same maximum transmission power or limited average transmission power.
  • the present invention is all communication systems, terminals that need to minimize the power required for communication, such as communication between the sensor network, wireless LAN, machine-to-machine communication (MTC) and medical equipment Applicable to
  • the transmission power of the terminal is limited so that communication with the base station is often impossible.
  • the random access channel is transmitted in a good channel condition, so that communication is possible even in a situation where communication with the base station is impossible by the conventional technology.
  • the present invention can be applied to various mobile communication systems such as W-CDMA of 3GPP, LTE, LTE-A, or CDMA2000 of 3GPP2.
  • W-CDMA of 3GPP
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution
  • CDMA2000 of 3GPP2.
  • W-CDMA and LTE systems of the aforementioned mobile communication systems will be described.
  • CDMA2000 the same may be applied to the CDMA2000.
  • FIG. 1 illustrates a signal transmission structure on an uplink RACH in a mobile communication system.
  • random access channel transmission will be described based on a W-CDMA system as an example of a mobile communication system.
  • the terminal transmits a signal through a random access channel as shown in FIG.
  • a forward channel is an access preamble acquisition indication channel (AP-AICH) 130
  • a reverse channel is a random access channel (RACH).
  • the terminal transmits a preamble on a random access channel of a reverse link (uplink) for initial synchronization of communication.
  • the terminal transmits an access probe (AP) 0 (100) including a preamble through a random access channel.
  • AP access probe
  • the terminal transmits an access probe configured as a preamble as shown in FIG. 2A through a random access channel.
  • the AP 1 (110) that increases the transmission power by ⁇ P 104 than the AP 0 (100) random Retransmit through the access channel.
  • the AP 1 110 includes a preamble configured with the same signature as the AP 0 100.
  • the base station When the base station receives the AP 1 110 through a random access channel, the base station waits for a Tp-ai 120 time and then transmits the same signature as the AP 1 110 to the base station through the AICH 130.
  • the terminal demodulates the signal provided through the AICH 130 to identify the signature and the Acquisition Indicator (AI). If the acknowledgment (ACK) of the base station is confirmed through the acquisition confirmer, the terminal waits for Tp-mag time and then transmits a message including reverse (uplink) data to the base station through a reverse (uplink) random access channel. send. For example, the terminal transmits an access probe including a message configured as shown in FIG. 2B through a random access channel. At this time, the terminal transmits the access probe at a transmission power corresponding to the AP 1 (110).
  • the UE transmits an access probe including the message of FIG. 2 (B), and if the UE successfully receives it, it notifies the UE of reception through a forward (downlink) common channel. That is, the AICH is not transmitted and this signal is transmitted as a message on the forward (downlink) common channel.
  • the random access channel is transmitted through an uplink channel, and the base station receives the random access channel and transmits a random access response thereto to the terminal through the downlink channel.
  • the above-described reverse link is described as a downlink in which a base station transmits signals and data to a terminal.
  • the forward link is described as an uplink in which a terminal transmits signals and data to a base station.
  • random access channels are an essential element of a mobile communication system, and random access channels are implemented in various ways. Regardless of this specific implementation method, the conventional random access channel has transmitted an immediate access probe when an random access channel transmission event occurs in a higher layer regardless of the uplink channel state. However, this instant random access channel transmission requires excessive transmission power.
  • a method of measuring downlink channel state in a mobile communication system to obtain uplink channel state information and transmitting a random access channel only when it meets a specific transmission condition In this way, it is determined whether to transmit the random access channel according to the channel state, and if the transmission condition is not satisfied, the transmission power can be greatly reduced by delaying the transmission of the random access channel access probe.
  • the coverage radius of the UE can be greatly extended under the same maximum or average transmission power. As described above, determining whether to transmit a random access channel according to a channel state is described as a channel adaptive random access channel.
  • the UE determines the random access channel transmission condition in advance and measures the downlink channel to transmit the random access channel only when the downlink channel satisfies the transmission condition. In this case, the random access channel transmission is delayed. By doing so, it is possible to significantly reduce the transmission power used for transmission by transmitting a random access channel only when the channel is good.
  • the terminal measures the channel quality of the downlink channel, but there is a problem that the random access channel is transmitted to the uplink channel. That is, in the FDD mode in which frequency bands of the downlink channel and the uplink channel are separated from each other, there may be a difference between the quality of the measured downlink channel and the quality of the uplink channel for transmitting the random access channel. Accordingly, in the case of the UE operating in the FDD mode, when the channel adaptive random access channel method described above is used, the effects of preventing transmission power waste and increasing transmission distance may not occur depending on circumstances. Accordingly, the present invention provides a method and apparatus for achieving the effect of the aforementioned channel adaptive random access channel in the FDD mode according to an embodiment of the present invention.
  • the terminal determines the quality state of the transmission channel for transmitting the random access channel based on a signal (eg, a reference signal) for measuring the quality of the transmission channel transmitted by the base station.
  • a signal eg, a reference signal
  • the quality of a transmission channel is described as a signal for measuring a reference signal or a pilot signal.
  • the present invention is not limited thereto and may include all signals or channels for measuring the quality of a transmission channel. have.
  • a base station transmits a pilot or reference signal (reference signal) continuously or periodically downlink.
  • FIG. 3 is a diagram illustrating an access probe transmission process through a downlink channel of W-CDMA.
  • the terminal receives a reference signal through the downlink.
  • the base station suspends signal and data transmission on the downlink in a predetermined time interval (T1 + Tp + T2) and enables the terminals to transmit a random access channel. That is, the terminal of the mobile communication system may receive a reference signal in the downlink channel, and may transmit a random access channel in a time interval Tp where the downlink signal and data are temporarily stopped.
  • the time interval during which the base station does not transmit a signal is a period of T1 + Tp + T2, of which Tp is a period in which the terminal can transmit the access probe, and T1 and T2 are guard times between the access probes.
  • the terminal may transmit a random access channel that is a time interval of Tp.
  • the UE measures the channel state of the downlink before the time point at which the random access channel is available.
  • the terminal may further include receiving system information including a transmission parameter for random access channel transmission.
  • the transmission parameter may include length information of a first time interval for transmitting an access probe in a downlink channel, period information of the first time interval, and position information of the first time interval.
  • the UE should know when the transmission interval for transmitting the random access channel in the downlink channel.
  • the base station transmits a transmission parameter to the terminal through the signaling to the terminal.
  • transmission parameter information should be shared between the BS and the UE.
  • the transmission parameter may include information such as whether the terminal allows the UE to transmit a random access channel in the downlink channel and the length of a Tp section, its period and position, which may transmit the random access channel in the downlink.
  • the base station may transmit a transmission parameter to the terminals as system information through a broadcasting channel.
  • a UE uses a downlink pilot channel to measure a downlink channel.
  • downlink channel measurements need to be accurate.
  • the transmission power of the pilot channel may be increased immediately before the random access channel transmission time.
  • the terminal may receive a reference signal of the improved transmission power through the pilot channel to measure more accurate channel quality.
  • the base station instantly increases the power of the pilot channel for a predetermined time period (Tm) before the T1 section in FIG. 3 for random access channel transmission in the downlink channel.
  • Tm time period
  • the power of the pilot channel is increased by a certain amount ⁇ P and transmitted.
  • This time interval and the amount of ⁇ P may be transmitted to the terminals in advance as system information through a broadcasting channel, like other parameters.
  • the UE does not transmit signals and data through the downlink channel so that the UE can transmit a random access channel in the interval of Tp.
  • the terminal uses a pilot channel with increased power during Tm time for downlink channel measurement.
  • the pilot channel of the increased power can be used to measure the state of the downlink channel more accurately. It is determined whether the random access channel is transmitted based on the measured downlink channel state. If the UE determines to transmit the random access channel, it transmits the random access channel during the subsequent Tp period.
  • FIG. 4 illustrates an access probe transmission process through a high link channel of W-CDMA.
  • a base station transmits a reference signal to a part of a frequency band used as an uplink for transmitting a signal to a base station.
  • the uplink channel is generally used for transmitting signals or data transmitted by the terminals to the base station.
  • the base station transmits a reference signal in the frequency band of the uplink channel for some time interval to transmit the channel adaptive random access channel to enable channel measurement.
  • the UE while the UE transmits signals or data to the base station through the uplink, the UE stops transmitting the uplink during the time period of T3 + Tm + T4. During this period, the base station transmits a reference signal for channel measurement to the terminal in the time interval of Tm.
  • the transmitting signal is a signal for measuring the quality of the transmission channel transmitting a random access channel (in the case of W-CDMA pilot channel), the transmission channel is spread using a downlink spreading code corresponding to the corresponding uplink do.
  • the terminal measures the state of the transport channel using the reference signal transmitted during this Tm time period. In addition, it may be determined whether a channel adaptive random access channel is transmitted based on the measured channel state. If the measured state of the transmission channel is greater than or equal to the predetermined reference value, the channel adaptive random access channel is transmitted. Otherwise, the random access channel is not transmitted. In this case, the channel adaptive random access channel may be transmitted during the Tp time period. That is, the UE can measure the channel quality of the frequency band of the uplink channel receiving the reference signal, and can also transmit a random access channel to the base station through the uplink channel.
  • all or some of the UEs of other terminals may be restricted from using the UL channel.
  • the terminal transmitting the channel adaptive random access channel does not transmit the uplink in the interval of T3 + Tm + T4.
  • other terminals do not additionally transmit uplink even after the Tp interval thereafter.
  • the terminal of the present invention may further include receiving system information including a reference signal parameter for receiving the reference signal.
  • the reference signal parameter includes information on reception time interval (for example, length information of time section, period information of time section and location information of time section, etc.), reception resource information and reception time section of receiving reference signal in uplink channel. It may include one or more of the period information.
  • the reference signal parameter may also include information on whether other users can use the uplink in the Tp period.
  • the above-described reception section means a section in which uplink data is not transmitted to a section for receiving a reference signal in the uplink channel.
  • the base station allocates reverse resources after receiving the access probe.
  • the channel used is a PDC channel.
  • the terminal uses the allocated reverse channel, the terminal transmits a message to be transmitted through random access.
  • a PUS channel is used for transmission of a reverse message and is transmitted in units of 1 ms.
  • the terminal of the present invention measures the channel quality using the frequency band of the uplink channel or the frequency band of the downlink channel as described above for channel adaptive random access channel transmission, and randomly through the measured frequency band.
  • the access channel can be transmitted.
  • the present invention unlike the conventional method of transmitting a random access channel immediately when an event of a conventional upper layer occurs, an access probe of a random access channel is transmitted only when a predetermined channel condition is satisfied. Otherwise, the transmission of the access probe is delayed.
  • a random access channel is transmitted only to a very good channel, a random access channel and a short message can be transmitted to a base station even when transmission is not possible. This can be useful when a call must be successful in an emergency, such as during a disaster.
  • the random access channel transmission of the present invention may be set to transmit only to a good channel environment of the upper 1% level.
  • the base station receives the access probe through the channel adaptive random access channel scheme, it is not known which terminal attempts to access and why. This is because meaningful data is actually included in subsequent messages. Since the conventional invention is a technique for improving only the performance of the access probe through the channel adaptive random access channel transmission scheme, it is necessary to improve the performance and communication distance of the actual message transmitted thereafter.
  • some time intervals of the downlink are allocated as a time for which the UE can transmit random access.
  • channel reciprocity is applied because the channel can be measured through the downlink signal and random access can be transmitted in the same frequency band.
  • the terminal measures the forward channel transmitted by the base station to determine the reverse channel state based on this.
  • a base station transmits pilot or reference signals continuously or periodically on the forward link.
  • the terminal by allowing the terminal to transmit the access probe and the access message transmitted thereafter for some time interval in the downlink of the FDD system, the random access performance is improved and the communication distance is extended.
  • the random access channel and a data transmission method of the present invention will be described in detail.
  • FIG. 5 is a flowchart illustrating a random access channel and a data transmission method according to various embodiments of the present disclosure.
  • the terminal may receive a reference signal for measuring the quality of the transmission channel for transmitting a random access channel through the transmission channel.
  • the transmission channel is downlink
  • the terminal may receive the reference signal without setting a separate time interval through the downlink channel.
  • the reference signal is a signal for measuring the quality of a transmission channel.
  • the quality of the transmission channel is measured using a reference signal or a pilot signal, but is not limited thereto. It is apparent to one skilled in the art that not only the reference signal but also any signal or channel for measuring the quality of the transmission channel can be used to measure the quality of the transmission channel.
  • the base station may transmit the reference signal to the terminal through the uplink channel during a second preset time period.
  • the terminal may stop signal transmission to the base station during the second preset time period and receive the reference signal from the base station through the uplink channel during the second time period.
  • the base station and the terminal should know when it is possible to transmit and receive the reference signal through the uplink channel. This is transmitted by the base station to the terminal via signaling. That is, the base station transmits system information including a second transmission parameter for transmitting the reference signal to the terminal, and the terminal can identify a second time interval through which the reference signal can be transmitted and received.
  • the second transmission parameter may include length information of the second time section, period information of the second time section, and location information of the second time section.
  • the terminal may measure the quality of the transmission channel using the received reference signal. In addition, the terminal may determine whether the random access channel is transmitted based on the measured quality of the transmission channel.
  • the terminal may trigger the random channel transmission when the quality of the transport channel is greater than or equal to a reference value and the random access channel transmission event occurs.
  • the terminal may transmit an access probe indicating the presence of the terminal for a first predetermined time interval.
  • the base station and the terminal should know when it is possible to transmit and receive the access probe through the transmission channel. This is transmitted by the base station to the terminal via signaling. That is, the base station transmits system information including the first transmission parameter for transmitting the access probe to the terminal, and the terminal can identify a first time interval through which the access probe can be transmitted through the system information.
  • the first transmission parameter may include length information of the first time section, period information of the first time section, and location information of the first time section.
  • the terminal may transmit a message including data through the transmission channel.
  • the terminal may transmit the message in different ways according to the type of mobile communication system.
  • the random access performance is improved and the communication distance can be extended than the conventional technology.
  • FIG. 6 is a flowchart illustrating a message transmission method including data in LTE according to various embodiments of the present disclosure.
  • the UE may receive information on a transmission resource for transmitting a message from the base station through the PDC channel in LTE.
  • a base station allocates resources of a reverse channel through a PDC channel in response to an access probe.
  • the terminal may receive information on the transmission resource through the PDC channel for a preset third time.
  • a method of receiving information on specific transmission resources will be described later.
  • the terminal may transmit a message including data through the allocated channel according to the information on the transmission resource.
  • the transmission channel is a downlink channel
  • the terminal may transmit the message through the allocated channel for a preset fourth time. A detailed method of transmitting a message in LTE will be described later.
  • FIG. 7 illustrates a random access channel and a data transmission process through a downlink channel in LTE according to various embodiments of the present invention.
  • FIG. 7 illustrates an example of an LTE communication system when downlink is used in an FDD mode according to various embodiments of the present disclosure.
  • the base station transmits a reference signal and a data channel in downlink.
  • a synchronization signal (Sync signal) is transmitted for initial synchronization of the terminal.
  • the base station stops the transmission of the downlink of the base station for a predetermined time interval (Tp) and allows the user to transmit a random channel access.
  • Tp time interval
  • the downlink of LTE is instantly changed and used for uplink, and at this moment, the terminal may transmit a random access channel through the reverse link.
  • the time interval during which the base station does not transmit a signal is during a time interval of T1 + Tp + T2, wherein Tp is a period in which the terminal transmits an access probe, and T1 and T2 are guard times between the access probes.
  • the terminal may transmit a random access channel during a time interval of Tp.
  • channel adaptive random access channel transmission requires forward channel measurement.
  • the terminal measures the downlink channel state before the random access channel transmission.
  • the UE may perform channel state measurement using a downlink reference signal before a random access channel can be transmitted. Thereafter, the terminal determines whether to transmit a random access channel based on the measured downlink channel state.
  • the base station transmits the random access probe in the time interval of T1 + Tp + T2 which does not transmit any signal, and the actual transmission interval is the guard time T1 and T2 time intervals. TP time interval excluded.
  • the base station receives the access probe, it informs the resource for transmitting a message through the downlink. This message is typically sent on the PDC channel. Thereafter, the base station does not transmit a signal for a time of T3 + Ta + T4. During that time, the terminal transmits a message including data during the Ta period. At this time, T3 and T4 are guard times.
  • the terminal transmits a message including data after the downlink, as well as the first access probe, and maintains a good channel state because these times are connected at a relatively small time. This enables more efficient random access channel transmission.
  • the UE knows when it is possible to transmit the random access channel on the downlink. This is transmitted by the base station to the terminal through signaling. That is, the terminal operates by receiving a parameter including information on the length and position of the Tp from the base station in advance.
  • this information when the terminal allows a moment for transmitting a random access channel to the downlink, this information must be shared in advance between the base station and the terminal.
  • This information includes information such as whether the downlink allows the instantaneous random access channel of the UE to be transmitted, the length of the Tp interval for transmitting the random access channel in the downlink, and the period and location thereof.
  • the information is transmitted to the terminal as system information through a broadcasting channel in advance.
  • FIG 8 illustrates a random access channel and a data transmission process through an uplink channel in LTE according to various embodiments of the present invention.
  • the base station transmits a signal for channel measurement through the uplink of the LTE system, and measures the state of a channel used by the terminal as the uplink based on this.
  • the transmitted signal may be a conventional reference signal or a pilot signal specially designed for this purpose.
  • the terminal transmits a signal to the base station through uplink
  • transmission of the uplink is stopped during the time period T11 + Tm + T12.
  • the base station transmits a forward channel for channel measurement during the time interval of Tm.
  • the transmitted signal is a forward pilot or a reference signal
  • the transmitted signal is spread using a downlink spreading code corresponding to the uplink.
  • a signal may be transmitted through spread using a predetermined spread code.
  • the terminal measures the state of the forward link using a pilot or reference signal transmitted during the time interval of Tm. Then, it is determined whether the channel adaptive random access channel is transmitted based on the measured channel state.
  • the channel adaptive random access channel is transmitted, otherwise the random access channel is not transmitted. At this time, the channel adaptive random access channel is transmitted during the time interval of Tp. T11 and T12 are guard times.
  • the terminal transmitting the channel adaptive random access channel transmits the uplink during the time interval of T11 + Tm + T12.
  • other terminals do not additionally transmit uplink during the time interval of Tp thereafter.
  • the base station receives the access probe and allocates a channel through which the terminal transmits a message including data through the forward channel.
  • a control message is transmitted to allocate resources for transmitting such a message, and this message is transmitted through uplink.
  • the base station after receiving the access probe, the base station allocates uplink resources by using uplink during Ta time, and then the terminal transmits a random access message by using the allocated resources. At this time, T13 and T14 are guard times.
  • this information must be shared in advance between the base station and the terminal.
  • This information includes information such as whether the uplink is instantaneously used as a pilot or reference signal for channel measurement, the length of the Tm time interval at which the base station transmits the pilot or reference signal on the uplink, and the period and location thereof.
  • the shared information may be transmitted to the terminals as system information through a broadcasting channel in advance.
  • FIG. 9 is a flowchart illustrating a message transmission method including data in W-CDMA according to various embodiments of the present disclosure.
  • the terminal may receive an AI signal indicating permission to transmit a message including data from a base station in W-CDMA.
  • W-CDMA the terminal checks the received AI, and the response of the base station can be confirmed through the AI.
  • the terminal may receive the AI signal during a fifth preset time interval.
  • W-CDMA a specific method of receiving an AI signal in response to an access preamble from a base station will be described later.
  • the terminal may transmit a message in response to the AI signal.
  • the terminal may transmit a message including the data to the base station through the reverse channel.
  • the terminal may transmit the message for a sixth preset time interval.
  • the W-CDMA system a specific method of transmitting a message by the terminal will be described later.
  • FIG. 10 illustrates a random access channel and a data transmission process through a downlink channel in W-CDMA according to various embodiments of the present invention.
  • a base station transmits a signal for measuring a channel through a downlink of a W-CDMA system and measures a state of a channel used by the terminal as a downlink based on this.
  • the transmitted signal may be a conventional reference signal or a pilot signal specially designed for this purpose.
  • the UE may perform channel state measurement using a downlink reference signal or a pilot signal before a random access channel transmission is possible. Thereafter, the terminal determines whether to transmit a random access channel based on the measured channel state of the downlink channel.
  • the base station transmits the random access probe in the time interval of T11 + Tp + T12 does not transmit any signal, the actual transmission interval except for the guard time T11 and T12 time interval Tp time interval.
  • the random access probe is transmitted and the terminal receives the downlink and waits for a response from the base station.
  • the base station receives the access probe to confirm that it has received the access probe and then transmits an AI channel that drops the message transmission.
  • the base station transmits an AI channel through downlink.
  • the base station does not transmit a signal during the T21 + Ta + T22 time interval.
  • the terminal transmits a message in the Ta time interval.
  • T21 is the guard time. Therefore, in the present invention, the terminal transmits not only an initial access probe but also a message transmitted thereafter through the downlink, and these times are connected at a relatively small time, thereby maintaining a good channel state. This enables more efficient random access channel transmission.
  • the UE knows when it is possible to transmit a random access channel on the downlink. This is transmitted by the base station to the terminal through signaling. That is, the terminal operates in advance by receiving a parameter from the base station including information on the length, position, and period of the Tp from the base station. In addition, the terminal also knows when it is possible to transmit a message on the downlink. That is, the terminal operates in advance by receiving a parameter from the base station including the information on the length, position and period of the Tm from the base station.
  • FIG. 11 illustrates a random access channel and a data transmission process through an uplink channel in W-CDMA according to various embodiments of the present invention.
  • a base station transmits a signal for measuring a channel through an uplink of a W-CDMA system and measures a state of a channel used by the terminal as an uplink based on this.
  • the transmitted signal may be a conventional reference signal or a pilot signal specially designed for this purpose.
  • the UE while the UE transmits a signal to the base station through uplink, the UE stops uplink transmission during a time interval of T11 + Tm + T12. During this time interval, the base station transmits a forward channel for channel measurement during the time interval of Tm.
  • the transmitted signal is a forward pilot signal or a reference signal
  • the transmitted signal is spread using a downlink spreading code corresponding to the uplink.
  • the spreading code can be spread by using a predetermined spread code.
  • the terminal measures the state of the forward link using a pilot signal or a reference signal transmitted during this Tm time interval. Then, it is determined whether the channel adaptive random access channel is transmitted based on the measured channel state.
  • the channel adaptive random access channel is transmitted. Otherwise, the random access channel is not transmitted. At this time, the channel adaptive random access channel is transmitted during the Tp time interval. T11 and T12 are guard times.
  • all or some of the other users may be restricted from using uplink during the Tp time interval in which the channel adaptive random access channel is transmitted.
  • the terminal transmitting the channel adaptive random access channel does not transmit the uplink during the time interval of T11 + Tm + T12.
  • the other terminals do not perform uplink transmission thereafter even during the additional Tp time interval.
  • the base station receives the access probe to confirm that it has received the access probe on the forward channel and then transmits an AI channel that allows message transmission. In the embodiment of the present invention, the base station transmits such an AI channel on the uplink.
  • the base station allocates an uplink resource using the uplink during the Ta time interval, and then the terminal transmits a random access message using the allocated resource. At this time, T13 and T14 are guard times.
  • the present invention discloses a method for allowing a base station to transmit a response to receiving a pilot signal, a reference signal, or an access probe for a portion of the uplink time period.
  • a method for allowing a terminal to transmit a random access probe and a message transmitted thereafter for a portion of the downlink is disclosed. These methods may be used in the general case, but may be more effective to use in emergency situations, such as in disaster situations. Therefore, it is necessary to inform the terminals in advance through broadcasting information whether the system is operating in this mode. In addition, broadcast and share related parameters in addition to operation.
  • FIG. 12 is a flowchart illustrating a random access channel and a data reception method by a base station according to various embodiments of the present disclosure.
  • the base station may transmit a reference signal for quality measurement of a transmission channel for transmitting a random access channel to the terminal through the transmission channel. For example, when the transmission channel is the uplink, the base station may transmit the reference signal to the terminal during the second preset time period. The terminal does not transmit the uplink to the base station during the second preset time period.
  • the base station may receive an access probe indicating the presence of a terminal transmitting a random access channel during a preset first time interval.
  • Information about the first time interval for example, information about the length, location and period of the first time interval may be shared between the terminal and the base station.
  • the base station may transmit system information including information about the length, location and period of the first time interval to the terminal.
  • the base station may receive a message including data over a transport channel.
  • the message may be a random access message received through a random access channel.
  • the base station when a base station receives an access probe, the base station may transmit information on a transmission resource for transmitting the message through a PDC channel.
  • the transmission channel is an uplink channel, the base station may transmit information on the transmission resource through the PDC channel for a third predetermined time.
  • the base station may receive the message through the assigned channel according to the information on the transmission resource.
  • the transmission channel is a downlink channel
  • the base station may receive the message through the assigned channel for a fourth predetermined time.
  • a base station may transmit an AI signal indicating permission to transmit the message upon receiving an access probe.
  • the base station may transmit the AI signal for a fifth predetermined time.
  • the base station may receive a message including data through the transport channel.
  • the transmission channel is a downlink channel
  • the message may be received for a sixth preset time interval.
  • FIG. 13 is a flowchart illustrating a random access channel and a data transmission method between a terminal and a base station according to various embodiments of the present disclosure.
  • the base station 1300 In step 1310, the base station 1300 generates a reference signal to be transmitted to the terminal 1301.
  • the reference signal refers to a signal received by the terminal 1301 to measure the quality of a channel on which the corresponding reference signal is transmitted.
  • it may be a signal such as CRS or CSI-RS in the LTE system.
  • it may include all signals used for measuring channel quality in each communication system, and may include a pilot signal designed according to the present invention.
  • channel measurement may be performed using a synchronization signal periodically transmitted by a base station.
  • the quality of the channel may be measured using a message transmitted from the base station to the terminal.
  • a channel such as a BCH periodically transmitted in an LTE system may be used for channel measurement.
  • the base station 1300 may transmit a reference signal for measuring the quality of the transmission channel for transmitting a random access channel to the terminal 1301 through the transmission channel. For example, when the transmission channel is the uplink, the base station 1300 may transmit the reference signal to the terminal 1301 during the second preset time period. The terminal 1301 does not transmit the uplink to the base station during the second preset time period.
  • the terminal 1301 may measure the quality of a transmission channel using the received reference signal. Specifically, channel quality may be measured using RSRP or RSRQ of a reference signal, and a channel quality measurement procedure in each mobile communication system may be used.
  • the terminal 1301 may determine whether to transmit the random access channel based on the measured channel quality measurement result. That is, when the quality of the transport channel is measured above a predetermined reference value, and the random access channel transmission event occurs, the terminal 1301 may determine the random access channel transmission. If a random access channel transmission event occurs, if the channel quality result does not reach the reference value, the terminal 1301 may determine that the random access channel is not transmitted and may delay the transmission. The delay time may be a preset time. Alternatively, the channel quality may be measured using the next reference signal, and then delayed until the reference signal exceeds the reference value.
  • the terminal 1301 may transmit an access probe indicating the presence of the terminal for a first predetermined time interval.
  • the base station 1300 may perform a response to the terminal upon receiving the access probe. For example, in the LTE system, as the base station 1300 receives an access probe, the base station 1300 may transmit information on a transmission resource for transmitting the message through a PDC channel. In addition, in the W-CDMA system, the base station 1300 may transmit an AI signal indicating permission to transmit the message upon receiving the access probe.
  • the terminal 1301 may transmit a message including data through a transmission channel.
  • the terminal may transmit the message in different ways according to the type of mobile communication system.
  • the random access performance is improved and the communication distance can be extended than the conventional technology.
  • FIG. 14 is a block diagram illustrating a structure of a terminal according to various embodiments of the present disclosure.
  • the terminal includes an antenna 1400, a receiver 1410, a channel measurer 1420, a reception frequency oscillator 1430, a controller 1440, a transmitter 1450, and a transmission frequency oscillator 1460. It may be configured to include).
  • the antenna 1400 performs a role of receiving a signal transmitted through a wireless channel and transmitting a signal transmitted by a terminal.
  • the receiver 1410 recovers data from the signal provided from the antenna 1400.
  • the receiver 1410 may include an RF receiving block, a demodulation block, a channel decoding block, and the like.
  • the RF receiving block is composed of a filter and an RF preprocessor.
  • the channel decoding block includes a demodulator, a deinterleaver and a channel decoder.
  • the channel measurer 1420 estimates a transmission channel using the received signal provided from the receiver 1410. For example, the channel measurer 1420 estimates the received power of the received signal using a pilot or reference signal of the downlink signal.
  • the receive frequency oscillator 1430 generates a frequency for receiving a signal at the receiver 1410. In general, the reception frequency and the transmission frequency are set differently in the FDD mode.
  • the controller 1440 determines whether to transmit a random access channel based on the state information of the transmission channel provided from the channel measurer 1420. That is, the controller 1440 determines whether to transmit a random access channel by comparing the power of the received signal estimated by the channel measurer 1420 with a reference value. For example, when the power of the received reference signal estimated by the channel measurer 1420 is less than or equal to the reference value, the controller 1440 determines that the transmission channel state is not suitable for random access channel transmission. Accordingly, the controller 1440 controls the transmitter 1450 not to transmit the random access channel. For another example, when the power of the reference signal estimated by the channel measurer 1420 is greater than the reference value, the controller 1440 determines that the transmission channel state is suitable for random access channel transmission.
  • the controller 1440 controls the transmitter 1150 to transmit a random access channel.
  • the controller 1440 may determine whether to transmit a random access channel using a reference value provided from the base station.
  • the controller 1440 may calculate a reference value in consideration of a quality of service (QoS) of a service requested by a user.
  • QoS quality of service
  • the controller 1440 may control the terminal to measure the channel state of the transport channel only at a predetermined time. That is, the controller 1440 determines the next transmission channel state measurement time and performs measurement of the transmission channel if the current time is that time. Otherwise, the controller 1440 turns off the terminal until the next measurement time to minimize power consumption. When the next measurement time comes when the power of the terminal is turned off, the controller 1140 may operate the receiver of the terminal to measure the channel state of the transmission channel.
  • the transmitter 1450 generates a signal to be transmitted to a base station through a random access channel under the control of the controller 1440. That is, the transmitter 1450 converts a signal to be transmitted to a base station through a random access channel into a form for transmission through a radio resource and provides the antenna 1400 only when the controller 1440 controls to perform random access channel transmission. do.
  • the transmitter 1450 includes a signal generation block, a channel code block, a modulation block, an RF transmission block, and the like.
  • the channel code block is composed of a modulator, an interleaver, a channel encoder, and the like.
  • the RF transmission block is composed of a filter and an RF preprocessor.
  • the transmission frequency oscillator 1460 oscillates a transmission frequency necessary for signal transmission in the transmitter 1450 under the control of the controller 1440.
  • the UE may instantaneously set a frequency of the transmitter 1450 to be the same as the frequency of the receiver 1410 and transmit a random access channel in downlink of FDD mode.
  • the controller 1440 oscillates the frequency of the transmission frequency oscillator 1460 according to the downlink reception frequency.
  • the UE instantaneously receives a reference signal transmitted by the base station in the uplink of the FDD mode.
  • the controller 1440 oscillates the frequency of the reception frequency oscillator 1430 according to the uplink transmission frequency.
  • the structure of the base station is similar to that of FIG. However, the operation of the controller and the actual transmitted signal is different.
  • the base station instantaneously sets the frequency of the receiver equal to the downlink frequency to receive a random access channel in the downlink of the FDD mode.
  • the controller oscillates the frequency of the receiving frequency oscillator according to the frequency of the downlink.
  • the base station instantaneously transmits the reference signal on the uplink channel of the FDD mode. For this purpose, the controller oscillates the frequency of the transmitting frequency oscillator according to the frequency of the uplink.
  • 15 is a block diagram illustrating a configuration of a base station according to various embodiments of the present disclosure.
  • a terminal transmitting a random access channel and data receives a reference signal for measuring a quality of a transmission channel transmitting a random access channel through the transmission channel.
  • the control unit 1520 and the random access channel are transmitted to measure the quality of the transmission channel using the reference signal, and determine whether to transmit the random access channel based on the measured quality of the transmission channel. If it is determined, the transmitter 1530 may include a transmitter 1530 which transmits an access probe indicating the presence of the terminal during a first preset time interval and transmits a message including data through the transmission channel.
  • the terminal 1500 includes a receiver 1510, a controller 1520, and a transmitter 1530.
  • the receiver 1510 receives control information, data, and a message from a base station through a corresponding channel.
  • the aforementioned reference signal can be received.
  • the reference signal may be received through a transmission channel of a random access channel. That is, according to the above-described embodiments, it may be received through a downlink channel or may be received through an uplink channel.
  • the receiver 1510 may receive a transmission parameter through a broadcast channel.
  • the transmission parameter may include one or more information of transmission section information, transmission resource information, and period information of the transmission section capable of transmitting a random access channel in the downlink channel.
  • the receiver 1510 may receive information regarding a transmission mode including general mode or disaster mode related information from a base station.
  • the controller 1520 controls the overall operation of the terminal according to the control of the transmission of the channel-adaptive random access channel required to carry out the above-described present invention.
  • the controller 1520 may measure the quality of the transmission channel using the reference signal and determine whether to transmit a random access channel.
  • the controller 1010 may change and control the setting of the transmission mode.
  • the transmitter 1530 transmits control information, data, and messages to the base station through the corresponding channel.
  • the transmitter 1020 may transmit a random access channel to the base station through the corresponding transmission channel.
  • the transport channel may be a downlink channel and may be an uplink channel. It may be set differently according to each of the above-described embodiments.
  • 16 is a block diagram illustrating a configuration of a user terminal according to various embodiments of the present disclosure.
  • a base station receiving a random access channel and data in a frequency division duplex (FDD) mode may include: a controller 1610 for generating a reference signal for measuring a quality of a transmission channel transmitting a random access channel; Receives an access probe indicating the existence of a transmitter 1620 for transmitting the generated reference signal to the terminal through the transmission channel and the terminal for transmitting a random access channel during a first predetermined time interval, and the data through the transmission channel It includes a receiver 1630 for receiving a message including a.
  • FDD frequency division duplex
  • the base station 1600 includes a controller 1610, a transmitter 1620, and a receiver 1630.
  • the receiver 1630 receives data and messages from the terminal through a corresponding channel.
  • the receiver 1630 may receive the above-described random access channel. That is, the receiver 1630 may transmit a random access channel through the corresponding transmission channel from the terminal.
  • the transport channel may be a downlink channel and may be an uplink channel. It may be set differently according to each of the above-described embodiments.
  • the controller 1610 may generate a reference signal for measuring a quality of a transmission channel through which the terminal transmits a random access channel.
  • the controller 1610 controls the overall operation of the base station according to receiving the channel-adaptive random access channel required to perform the above-described present invention.
  • the controller 1610 may generate a signal for setting a transmission mode, and generate a transmission parameter and a reference signal parameter.
  • the transmitter 1620 may transmit a reference signal through a transmission channel.
  • the reference signal may be transmitted through a transmission channel of a random access channel. That is, according to the above-described embodiments, it may be transmitted through a downlink channel or through an uplink channel.
  • the transmitter 1620 may transmit a transmission parameter through a broadcast channel.
  • the transmission parameter may include one or more information of transmission section information, transmission resource information, and period information of the transmission section capable of transmitting a random access channel in the downlink channel.
  • the transmitter 1620 may transmit information regarding a transmission mode including general mode or disaster mode related information to the terminal.
  • the transmitter 1620 transmits control information, data, and messages to the terminal through a corresponding channel.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne une technologie de transfert de canal d'accès aléatoire dans un système de communication mobile. Plus spécifiquement, la présente invention concerne un procédé de transfert, par un terminal, d'un canal d'accès aléatoire dans un mode FDD, le procédé comprenant les étapes suivantes : la réception, sur un canal de transfert, d'un signal pour mesurer la qualité du canal de transfert qui transfère le canal d'accès aléatoire ; la mesure de la qualité du canal de transfert en utilisant le signal, et la détermination que le canal d'accès aléatoire a été transféré ou non, en fonction de la qualité mesurée du canal de transfert ; s'il est déterminé que le canal d'accès aléatoire a été transféré, le transfert d'une sonde d'accès qui indique la présence du terminal pendant un premier intervalle de temps préréglé ; et le transfert d'un message qui contient des données sur le canal de transfert.
PCT/KR2015/013931 2014-12-18 2015-12-18 Canal d'accès aléatoire ainsi que procédé et appareil de transfert de données WO2016099194A1 (fr)

Applications Claiming Priority (4)

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KR10-2014-0183170 2014-12-18
KR20140183170 2014-12-18
KR1020150179822A KR101870859B1 (ko) 2014-12-18 2015-12-16 임의 접근 채널 및 데이터 전송 방법 및 장치
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018106260A1 (fr) * 2016-12-09 2018-06-14 Intel Corporation Contrôle d'accès de canal partagé dans une architecture de conformation de faisceau

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