WO2015147557A1 - Équipement d'échange de signaux et procédé d'agrégation de porteuses en duplex à répartition dans le temps et en duplex à répartition en fréquence dans un système de communication sans fil - Google Patents

Équipement d'échange de signaux et procédé d'agrégation de porteuses en duplex à répartition dans le temps et en duplex à répartition en fréquence dans un système de communication sans fil Download PDF

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Publication number
WO2015147557A1
WO2015147557A1 PCT/KR2015/002941 KR2015002941W WO2015147557A1 WO 2015147557 A1 WO2015147557 A1 WO 2015147557A1 KR 2015002941 W KR2015002941 W KR 2015002941W WO 2015147557 A1 WO2015147557 A1 WO 2015147557A1
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WO
WIPO (PCT)
Prior art keywords
tdd
fdd
carrier
base station
terminal
Prior art date
Application number
PCT/KR2015/002941
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English (en)
Korean (ko)
Inventor
이희광
권일원
맹승주
전재호
최정아
Original Assignee
삼성전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from KR1020140054218A external-priority patent/KR102310991B1/ko
Application filed by 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to US15/129,289 priority Critical patent/US10313004B2/en
Priority to CN201580026690.0A priority patent/CN106464352B/zh
Priority to EP15768291.5A priority patent/EP3125440B1/fr
Publication of WO2015147557A1 publication Critical patent/WO2015147557A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2615—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using hybrid frequency-time division multiple access [FDMA-TDMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data

Definitions

  • the present invention is to support Carrier Aggregation (CA) using a plurality of carriers in a wireless communication system.
  • CA Carrier Aggregation
  • FDD frequency division duplex
  • TDD time division duplex
  • the FDD is suitable for a service such as voice generating symmetric traffic
  • the TDD is bursty and asymmetrical like the Internet or data. It is suitable for services with asymmetric traffic.
  • the TDD utilizes the spectrum more efficiently.
  • the FDD cannot be used in an environment in which the service provider does not have enough bandwidth to provide the guardband required between the transmit and receive channels.
  • the TDD is more flexible than the FDD in satisfying a requirement of dynamically setting uplink and downlink according to a customer's request.
  • CA Carrier Aggregation
  • LTE Long Term Evolution
  • A Advanced
  • the CA enables aggregation of multiple carriers to obtain a wider overall system bandwidth. Through this, the peak data rate of the system can be increased.
  • CAs of TDD carriers and CAs of FDD carriers are supported, and no standard or technology for a CA that uses both TDD carriers and FDD carriers has been presented.
  • An embodiment of the present invention provides a TDD-FDD CA operation scheme in a wireless communication system.
  • An embodiment of the present invention provides a signaling scheme for a TDD-FDD CA in a wireless communication system.
  • An embodiment of the present invention provides a method for improving a base station access efficiency of a terminal when operating a TDD-FDD CA in a wireless communication system.
  • a terminal device in a wireless communication system according to an embodiment of the present invention, includes frame configuration information used in a second carrier operated in a TDD (Time Division Duplex) scheme, a first carrier operated in a Frequency Division Duplex (FDD) scheme, and A receiver for receiving downlink data through a downlink TDD-FDD CA using the second carrier, and a transmitter for transmitting uplink data through the first carrier, the downlink data received from the second carrier Is received through a downlink subframe identified by the frame configuration information.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • a base station apparatus includes frame configuration information used in a second carrier operated by a TDD (Time Division Duplex) scheme, a first carrier operated by a Frequency Division Duplex (FDD) scheme, and A downlink unit for transmitting downlink data through a downlink TDD-FDD CA using the second carrier, and a downlink unit for receiving uplink data through the first carrier, and downlink data transmitted from the second carrier Is transmitted through a downlink subframe identified by the frame configuration information.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • a method of operating a terminal in a wireless communication system includes the steps of receiving frame configuration information used in a second carrier operated in a TDD (Time Division Duplex) scheme and a frequency division duplex (FDD) scheme.
  • the downlink data received at is received through a downlink subframe identified by the frame configuration information.
  • a method of operating a base station includes a process of transmitting frame configuration information used in a second carrier operated in a time division duplex (TDD) scheme and a frequency division duplex (FDD) scheme. And transmitting downlink data through a downlink TDD-FDD CA using the first carrier and the second carrier, and receiving uplink data through the first carrier, wherein the second carrier
  • TDD time division duplex
  • FDD frequency division duplex
  • a terminal device transmits information indicating that it supports carrier aggregation using a frequency division duplex (FDD) carrier and a time division duplex (TDD) carrier to a base station, and transmits TDD subframe information from the base station.
  • FDD frequency division duplex
  • TDD time division duplex
  • a receiver configured to receive the cell configuration information.
  • a base station apparatus includes: a receiver configured to receive information indicating that carrier aggregation (CA) using a frequency division duplex (FDD) carrier and a time division duplex (TDD) carrier is supported from a terminal; And a transmitter for transmitting cell configuration information including TDD subframe information to the terminal.
  • CA carrier aggregation
  • FDD frequency division duplex
  • TDD time division duplex
  • a method of a terminal in a wireless communication system includes the steps of transmitting information indicating that it supports carrier aggregation using a frequency division duplex (FDD) carrier and a time division duplex (TDD) carrier to a base station; And receiving cell configuration information including TDD subframe information from the base station.
  • FDD frequency division duplex
  • TDD time division duplex
  • a method of a base station includes: receiving information indicating that carrier aggregation (CA) using a frequency division duplex (FDD) carrier and a time division duplex (TDD) carrier is supported from a terminal; And transmitting cell configuration information including TDD subframe information to the terminal.
  • CA carrier aggregation
  • FDD frequency division duplex
  • TDD time division duplex
  • a TDD-FDD capable terminal capable of performing a CA effectively in a wireless communication system.
  • a carrier aggregation (CA) using a frequency division duplex (FDD) carrier and a time division duplex (TDD) carrier may be supported.
  • FDD frequency division duplex
  • TDD time division duplex
  • uplink communication is performed only through the FDD cell, thereby extending TDD coverage.
  • an area in which the FDD-TDD CA is possible can be extended, and the downlink transmission rate can be improved.
  • FIG. 1 illustrates an example of a configuration of a frequency division duplex (FDD) cell and a time division duplex (TDD) cell in a wireless communication system according to an embodiment of the present invention.
  • FDD frequency division duplex
  • TDD time division duplex
  • FIG. 2 illustrates another configuration example of an FDD cell and a TDD cell in a wireless communication system according to an embodiment of the present invention.
  • FIG 3 illustrates coverage of an FDD cell and a TDD cell in a wireless communication system according to an embodiment of the present invention.
  • FIG. 4 illustrates an example of a frame structure of an FDD cell and a TDD cell in a wireless communication system according to an embodiment of the present invention.
  • FIG. 5 illustrates usable amounts of downlink resources and uplink resources in a wireless communication system according to an embodiment of the present invention.
  • FIG. 6 illustrates an example of various structures of a TDD frame in a wireless communication system according to an embodiment of the present invention.
  • FIG. 7 illustrates a structure of a guard time of a TDD frame in a wireless communication system according to an embodiment of the present invention.
  • FIG. 8 illustrates a signal transmission and reception operation procedure of a terminal in a wireless communication system according to an embodiment of the present invention.
  • FIG. 9 illustrates a signal transmission and reception operation procedure of a base station in a wireless communication system according to an embodiment of the present invention.
  • FIG. 10 illustrates a signal exchange procedure between a terminal and a base station in a wireless communication system according to an embodiment of the present invention.
  • RRC radio resource control
  • FIG. 12 illustrates a procedure of control signaling for a CA in a wireless communication system according to an embodiment of the present invention.
  • FIG. 13 illustrates a signal exchange procedure for a CA in a wireless communication system according to an embodiment of the present invention.
  • FIG. 14 illustrates a configuration procedure for a CA in a wireless communication system according to an embodiment of the present invention.
  • FIG. 15 illustrates an example of a frame structure of a TDD cell including only downlink in a wireless communication system according to an embodiment of the present invention.
  • FIG. 16 illustrates an example of enabling or disabling secondary cell configuration in a wireless communication system according to an embodiment of the present invention.
  • 17 is a block diagram of a terminal device for performing CA in a wireless communication system according to an embodiment of the present invention.
  • FIG. 18 is a block diagram of a base station apparatus for performing CA in a wireless communication system according to an embodiment of the present invention.
  • 19 is a block diagram of a base station apparatus for performing a CA in a wireless communication system according to an embodiment of the present invention.
  • the present invention describes a technique for carrier aggregation of a frequency division duplex (FDD) cell and a time division duplex (TDD) cell in a wireless communication system.
  • FDD frequency division duplex
  • TDD time division duplex
  • the present invention uses the terms and names defined in the Long Term Evolution (LTE) standard.
  • LTE Long Term Evolution
  • the present invention is not limited to the above terms and names, and may be equally applied to systems conforming to other standards.
  • connection state used for identifying a carrier, a cell, a signaling procedure, a network entity, etc. used in the following description are for convenience of description. Therefore, the present invention is not limited to the terms described below, and other terms may be used to refer to objects having equivalent technical meanings.
  • the present invention uses the terms and names defined in the LTE standard. However, the present invention is not limited to the above terms and names, and may be equally applied to systems conforming to other standards.
  • Various embodiments of the present invention relate to a technology for supporting CA of a TDD carrier and an FDD carrier.
  • CA between TDD and FDD carriers allows operators to use all available spectrum resources, and can also provide system flexibility and performance benefits. That is, since the FDD and the TDD spectrum can be more flexibly utilized, the problem of spectral resource shortage can be greatly reduced.
  • the combination of the FDD carrier and the TDD carrier may have an advantage in supporting asymmetric traffic.
  • Frequency bands used for communication are previously divided into a frequency band for a TDD cell and a frequency band for an FDD cell.
  • FDD cells are assigned to a lower frequency band. Accordingly, the FDD cell may be disadvantageous in terms of data rate, but is advantageous in terms of coverage.
  • the TDD cell is mainly assigned to a high frequency band. Accordingly, the TDD cell may be disadvantageous in terms of coverage, but is advantageous in terms of data rate. Accordingly, a system according to various embodiments of the present disclosure utilizes the advantages of the TDD cell and the FDD cell to support uplink communication through an FDD cell using a relatively lower frequency band, and the FDD cell and Downlink communication is supported through all of the TDD cells.
  • the present invention assumes that the FDD cell uses a lower frequency band, and various embodiments of the present invention are described as supporting uplink communication through the FDD cell.
  • the system according to another embodiment of the present invention can support uplink communication through the TDD cell.
  • the system according to an embodiment of the present invention may support FDD-TDD CA by further allocating an additional TDD carrier to a terminal capable of recognizing an FDD carrier.
  • the TDD carrier may belong to a licensed band or an unlicensed band.
  • the system according to an embodiment of the present invention may support the FDD-TDD CA by allocating the TDD carrier and the FDD carrier to a terminal capable of recognizing both the FDD carrier and the TDD carrier.
  • FIG. 1 illustrates an example of a configuration of an FDD cell and a TDD cell in a wireless communication system according to an embodiment of the present invention.
  • one base station 120 provides both the FDD cell 102 and the TDD cell 106 to the terminal 110.
  • the base station 120 may be a macro base station. Accordingly, the FDD cell 102 and the TDD cell 106 may have similar coverage.
  • the terminal 210 receives an FDD cell 202 from a macro base station 220 and a TDD cell 206 from a small base station 230. Accordingly, the TDD cell 206 may be included in the FDD cell 202 and a hierarchical cell structure may be formed.
  • the small base station 230 is not co-located in the coverage of the macro base station 220 as shown in FIG. Even when the coverage is not included in the coverage of the macro base station 220, the FDD-TDD CA may be performed.
  • the Cell coverage may be greatly limited by uplink coverage. This is because the uplink signal is transmitted by the terminal having a large power limit.
  • the UE may perform during a specific period than in an FDD cell. This is because more uplink data needs to be transmitted. Accordingly, the Modulation and Coding Scheme (MCS) level or bandwidth in the TDD cell should be higher than in the case of the FDD cell.
  • MCS Modulation and Coding Scheme
  • 3 illustrates coverage of an FDD cell and a TDD cell in a wireless communication system according to an embodiment of the present invention.
  • 3A illustrates that when the macro base station 320 provides both an FDD cell and a TDD cell, (b) the macro base station 320 provides an FDD cell and the small base station 330 provides a TDD cell. The case where it is shown is shown.
  • TDD coverage including uplink is narrower than TDD coverage according to an embodiment of the present invention. That is, a system according to various embodiments of the present disclosure may extend coverage of a TDD cell by performing uplink communication through an FDD cell. Accordingly, even if the UE is located outside the uplink coverage of the TDD cell, it may operate as a CA including the TDD cell.
  • FIG. 4 illustrates an example of a frame structure of an FDD cell and a TDD cell in a wireless communication system according to an embodiment of the present invention.
  • each of the FDD frame 403 and the TDD frame 407 includes ten subframes.
  • the FDD frame 403 includes ten downlink subframes and ten uplink subframes divided in a frequency axis, and the TDD frame 407 includes six downlink subframes and four uplink subframes. It contains frames.
  • four uplink subframes are not used for the UE operating in the FDD-TDD CA. That is, the downlink and uplink resources of the FDD frame 403 may be allocated to the UE in the FDD-TDD CA mode, but the uplink resources of the TDD frame 407 are excluded from the allocation. That is, in TDD-FDD CA operation, uplink communication uses only the resources of the FDD frame 403.
  • the UE may transmit control information to be transmitted through a control channel (eg, PUCCH) of the TDD cell through an uplink subframe of the FDD frame 403. .
  • control channel eg, PUCCH
  • uplink subframes of the TDD frame 407 may be used by other terminals that do not operate as a TDD-FDD CA connected to the corresponding TDD cell.
  • the downlink resource 504 of the FDD cell and the downlink resource 508 of the TDD cell are used for downlink communication, and the uplink resource 505 of the FDD cell is used for uplink communication. Can be assigned. Accordingly, the capacity of the downlink resource is greatly increased without reducing cell coverage.
  • the TDD frame 407 illustrated in FIG. 4 includes six downlink subframes and four uplink subframes.
  • the ratio of the downlink subframes and the uplink subframes may vary according to a specific embodiment.
  • TDD frames as shown in FIG. 6 may be used below.
  • FIG. 6 illustrates an example of various structures of a TDD frame in a wireless communication system according to an embodiment of the present invention.
  • the TDD frame 407 of FIG. 4 illustrates configuration 1 of FIG. 6.
  • the ratio of the downlink subframe 602 and the uplink subframe 604, the downlink subframe 602, and the uplink Other configurations in which the arrangement of subframes 604 are different may also be used.
  • all subframes may be downlink subframes 602.
  • a subframe designated as 'S' is a special subframe 606 and includes a guard time for switching from downlink to uplink.
  • the special subframe 606 may be configured as shown in FIG. 7 below.
  • the special subframe 606 includes a downlink part (DwPTS) 772, a guard period (GP) 774, and an uplink part (UpPTS) 776. ). That is, part of the special subframe 606 may be used for downlink communication and part for uplink communication.
  • the guard period 774 is not allocated to the terminal accessing the TDD cell.
  • the base station is not only resources in the guard period 774 but also resources in the uplink portion 776. It can be used for downlink signal transmission to a channel. Accordingly, the efficiency of resource use is improved.
  • FIG. 8 illustrates a signal transmission and reception operation procedure of a terminal in a wireless communication system according to an embodiment of the present invention.
  • the terminal transmits a signal to the base station.
  • the terminal transmits TDD-FDD CA support availability information to the base station.
  • the terminal provides information of the supportable band to the base station.
  • the terminal may provide a combination of carriers to the base station.
  • the terminal may provide information in the form of ⁇ FDD band, TDD band ⁇ when both the FDD and the TDD are used.
  • the terminal when the terminal provides information of a supportable band such as ⁇ Band 25, Band 41 ⁇ to the base station, since the band 25 is an FDD band and the band 41 is a TDD band,
  • the base station may recognize that the terminal supports a TDD-FDD carrier. Examples of the band message for the TDD-FDD CA supportability information are shown in Tables 1 to 3 below.
  • the terminal receives cell configuration information.
  • the terminal receives uplink and downlink configuration information of a TDD secondary cell from the base station through a radio resource control (RRC) signal, and the terminal receives a common reference signal (CRS) through cell configuration information received from the base station. Recognizes a TDD uplink subframe that is not transmitted so that channel estimation is not performed in the uplink subframe.
  • the frame according to an embodiment of the present invention includes a frame composed of only downlink.
  • step 830 the terminal accesses the base station.
  • the terminal performs TDD-FDD CA without performing channel estimation in a TDD uplink subframe in which the CRS recognized in step 820 is not transmitted.
  • FIG. 9 illustrates a signal transmission and reception operation procedure of a base station in a wireless communication system according to an embodiment of the present invention.
  • the base station receives a signal from the terminal.
  • the base station receives TDD-FDD CA support availability information from the terminal.
  • the TDD-FDD CA supportability information includes information on a supportable band.
  • the supportable band information may be provided in the form of ⁇ FDD band, TDD band ⁇ when the UE uses both the FDD and TDD.
  • the terminal provides information of a supportable band such as ⁇ Band 25, Band 41 ⁇ to the base station, since the band 25 is an FDD band, and the band 41 is a TDD band,
  • the base station may recognize that the terminal supports a TDD-FDD carrier.
  • the base station transmits cell configuration information to the terminal.
  • the base station transmits uplink and downlink configuration information of the TDD secondary cell to the terminal, and the terminal recognizes the TDD uplink subframe in which the CRS is not transmitted through the cell configuration information and estimates the channel in the uplink subframe. Do not do it.
  • FIG. 10 illustrates a signal exchange procedure between a terminal and a base station in a wireless communication system according to an embodiment of the present invention.
  • step 1010 the terminal and the base station performs setup for the RRC layer.
  • the terminal transmits an RRC connection request message to the base station
  • the base station transmits an RRC connection setup message to the terminal
  • the terminal completes an RRC connection setup to the base station (connection) setup complete) message.
  • step 1020 the base station and the terminal performs mutual authentication (authentication).
  • step 1030 the base station and the terminal perform a NAS security procedure to securely transmit a Non Access Stratum (NAS) message.
  • step 1040 the base station requests CA capability information to the terminal.
  • the CA capability information includes information on the CA mode supported by the terminal.
  • the terminal transmits CA capability information to the base station.
  • the CA capability information includes information on a CA mode supported by the terminal.
  • the information on the CA mode includes information on bands to which the terminal is accessible. That is, the terminal transmits whether the terminal supports the CA to the base station, and provides detailed capability information on the CA if the CA supports the CA. For example, the terminal may provide information indicating whether the base station supports a TDD-FDD CA.
  • step 1060 the base station and the terminal performs an RRC security procedure to securely transmit the RRC message.
  • step 1070 the base station transmits an RRC connection reconfiguration message to the terminal.
  • the base station may provide information necessary for the terminal to access the specific CA mode. That is, the base station may configure a CA to be applied to the terminal based on the capability information of the terminal.
  • step 1080 the terminal transmits an RRC connection reconfiguration complete message to the base station. Accordingly, the terminal connects in a specific CA mode. According to an embodiment of the present disclosure, the terminal may access in TDD-FDD CA mode.
  • Management of a secondary cell is performed in the RRC layer of the base station.
  • the base station confirms whether CA is supported through the RRC layer, and configures channel measurement for a carrier and an assigned carrier as a secondary cell, adds a secondary cell, changes, releases a restriction, and provides system information about a secondary cell. And manages a physical uplink control channel (PUCCH) resource configuration, and also performs a primary cell activation, a primary cell handover, etc. so that a CA is possible because there is a secondary cell.
  • the base station manages activation and deactivation, resource allocation and scheduling, transport channel generation, and the like, for the secondary cell added in the RRC layer through a media access control (MAC) layer.
  • the procedure for secondary management in the RRC layer is the same as the content of FIG. 11.
  • FIG. 11 illustrates an example of an RRC connection resetting process in a wireless communication system according to an embodiment of the present invention.
  • the primary cell of the base station transmits an RRC connection reconfiguration message to the primary cell of the terminal.
  • the base station may provide information for RRC access so that the terminal can access the specific CA mode when the terminal supports a specific CA mode.
  • the UE transmits HARQ (Hybrid Automatic Repeat reQuest) acknowledgment (ACK) information from the primary cell to the primary cell of the base station.
  • HARQ Hybrid Automatic Repeat reQuest
  • ACK acknowledgment
  • the ACK signal is information for indicating whether the terminal has successfully received the information to the base station.
  • the terminal transmits ACK information to the base station in acknowledgment of the RRC connection reconfiguration message received from the base station.
  • step 1130 when the base station receives the ACK response from the terminal, the base station and the terminal resets the access information to access in a new mode.
  • the terminal requests scheduling from the primary cell to the primary cell of the base station. The terminal receives information from the base station and requests scheduling from the base station in order to be allocated resources for RRC connection reconfiguration.
  • the base station provides downlink control information (DCI) information from the primary cell to the primary cell of the terminal.
  • DCI downlink control information
  • the base station provides DCI information to the scheduling allocation request of the terminal so that the terminal can be allocated resources.
  • step 1160 the terminal completes the RRC connection configuration from the primary cell to the primary cell of the base station.
  • the terminal receives RRC connection reconfiguration information from the base station to allocate resources and complete the RRC connection reconfiguration.
  • step 1170 activate the secondary cell added through the MAC layer from the primary cell of the base station to the primary cell of the terminal, and in steps 1180 and 1190, the primary of the terminal in the primary cell and the secondary cell of the base station, respectively PDSCH (Physical Downlink Shared Channel) information is transmitted to the cell and the secondary cell.
  • PDSCH Physical Downlink Shared Channel
  • FIG. 12 illustrates a procedure of control signaling for a CA in a wireless communication system according to an embodiment of the present invention.
  • the first cell of the base station requests measurement configuration information from the terminal.
  • the base station requests information to confirm additional information of the secondary cell of the terminal.
  • step 1220 the terminal transmits measurement report information to the first cell of the base station base station.
  • the terminal transmits information on whether to add a secondary cell to the base station.
  • step 1230 RRC connection reconfiguration information is transmitted from the first cell of the base station to the terminal.
  • the base station transmits RRC connection reconfiguration information to the terminal upon receiving the information that the secondary cell is added from the terminal.
  • step 1240 the terminal transmits RRC connection resetting completion information to the first cell of the base station.
  • the terminal Upon receiving the RRC connection reconfiguration information from the base station, the terminal adds cell 2 as a secondary cell and applies the secondary cell configuration to complete the RRC connection reconfiguration.
  • step 1250 MAC activation information is transmitted from the first cell of the base station to the terminal.
  • the base station activates the cell through the MAC layer.
  • steps 1260 and 1270 data is transmitted through cells 2 and 1.
  • a MAC deactivation message is transmitted from the second cell of the base station to the terminal.
  • the base station deactivates the cell through the MAC layer when a predetermined time elapses.
  • the first cell of the base station transmits RRC connection reconfiguration information to the terminal.
  • the base station performs an RRC connection reconfiguration to de-restrict the secondary cell to the terminal.
  • FIG. 13 illustrates a signal exchange procedure for a CA in a wireless communication system according to an embodiment of the present invention.
  • the base station requests information to confirm additional information of the secondary cell of the terminal.
  • the terminal transmits CA capability information to the base station.
  • the CA capability information includes information indicating that the UE can perform a TDD-FDD CA.
  • the CA capability information may include information of a band that can be supported by the terminal. That is, when notifying that the TDD-FDD CA is supported, the CA capability information may include at least one TDD band information and at least one FDD band information as band information supported by the terminal.
  • the base station transmits configuration information of the TDD cell.
  • the base station transmits uplink and downlink configuration information of a TDD secondary cell to the terminal through an RRC signal.
  • configuration information of the TDD cell may include configuration information of a TDD frame used in the TDD cell.
  • the configuration information of the TDD cell is identification information indicating a ratio of a downlink subframe and an uplink subframe, an arrangement of the downlink subframe and an uplink subframe, the ratio, and a predefined configuration for the arrangement. It may include at least one of.
  • a configuration in which all subframes of the directable frame configurations are downlink subframes is included.
  • the UE recognizes a subframe in which the CRS is not transmitted of the TDD frame.
  • a subframe that does not transmit the CRS is an uplink subframe. That is, the terminal can recognize the TDD uplink subframe in which the CRS is not transmitted through the configuration information of the TDD cell received from the base station. Accordingly, the terminal can prevent a malfunction by avoiding channel estimation in the uplink subframe.
  • the terminal operates as a TDD-FDD CA.
  • the terminal performs CA with the base station through the remaining subframes and FDD cells other than the uplink frame of the TDD cell through the cell configuration information received from the base station.
  • the terminal and the base station may further perform signaling for configuring and activating the TDD cell.
  • Signal exchange for CA includes signal exchange between macro cells and signal exchange between macro cells and small cells according to FIG.
  • the terminal transmits CA capability information to the base station.
  • the CA capability information includes information indicating that the UE can perform a TDD-FDD CA.
  • the CA capability information may include information of a band that can be supported by the terminal. That is, when notifying that the TDD-FDD CA is supported, the CA capability information may include at least one TDD band information and at least one FDD band information as band information supported by the terminal.
  • the base station transmits configuration information of the TDD cell.
  • the base station transmits uplink and downlink configuration information of a TDD secondary cell to the terminal through an RRC signal.
  • configuration information of the TDD cell may include configuration information of a TDD frame used in the TDD cell.
  • the configuration information of the TDD cell is identification information indicating a ratio of a downlink subframe and an uplink subframe, an arrangement of the downlink subframe and an uplink subframe, the ratio, and a predefined configuration for the arrangement. It may include at least one of.
  • a configuration in which all subframes of the directable frame configurations are downlink subframes is included.
  • the UE recognizes a subframe in which the CRS is not transmitted among the TDD frames.
  • a subframe that does not transmit the CRS is an uplink subframe. That is, the terminal can recognize the TDD uplink subframe in which the CRS is not transmitted through the configuration information of the TDD cell received from the base station. Accordingly, the terminal can prevent a malfunction by avoiding channel estimation in the uplink subframe.
  • the terminal operates as a TDD-FDD CA.
  • the terminal performs CA with the base station through the remaining subframes and FDD cells other than the uplink frame of the TDD cell through the cell configuration information received from the base station.
  • the terminal and the base station may further perform signaling for configuring and activating the TDD cell.
  • 15 is a diagram illustrating a setup procedure for a CA in a wireless communication system according to an embodiment of the present invention.
  • step 1510 the base station performs initial configuration of the RRC layer.
  • the base station performs RRC resetting.
  • the base station activates the primary cell through the RRC layer.
  • the terminal measures a reference signal received power (RSRP) and transmits the measurement result to the base station
  • RSRP reference signal received power
  • the base station receives the measurement result to activate the primary cell.
  • secondary cell management according to a trigger event provided by the terminal to the base station is as follows.
  • the base station performs activation and deactivation of the secondary cell through the MAC layer.
  • the secondary cell activation indication is made through the MAC control element in the primary cell subframe. Secondary cell deactivation can be directly deactivated by the MAC, and can be automatically deactivated over time.
  • the terminal When CA is configured in the terminal, that is, when two or more serving cells are configured, the terminal reports channel state information (CSI) according to a separate configuration for each serving cell.
  • the configuration may include 'cqi-pmiConfigIndex' and 'ri-configIndex'.
  • the UE operating as an FDD-TDD CA may report both the CSI of the FDD cell and the CSI of the TDD cell through the FDD cell, that is, the primary cell.
  • the UE may report CSI using an uplink control channel (eg, PUCCH).
  • the configurable set of the CQI / PMI (Precoding Matrix Index) reporting period for the periodic CSI reporting may be different in the FDD cell and the TDD cell.
  • the set of selectable periods may be ⁇ 2, 5, 10, 20, 40, 80, 160, 32, 64, 128 ⁇ when expressed as the number of subframes.
  • the set of selectable periods may be ⁇ 1, 5, 10, 20, 40, 80, 160 ⁇ when expressed in the number of subframes.
  • the UE may report CSI using a scheduled uplink data channel (eg, a PUSCH (Physical Uplink Shared Channel)).
  • a scheduled uplink data channel eg, a PUSCH (Physical Uplink Shared Channel)
  • the terminal may report the CSI aperiodically according to a decoding result of uplink downlink control information (DCI) format 0/4 in a subframe.
  • DCI uplink downlink control information
  • FIG. 16 illustrates an example of a frame structure of a TDD cell including only downlink in a wireless communication system according to an embodiment of the present invention.
  • each of the FDD frame 1603 and the TDD frame 1607 includes ten subframes.
  • the FDD frame 1603 includes 10 downlink subframes and 10 uplink subframes divided in a frequency axis
  • the TDD frame 1607 includes 6 downlink subframes and 4 uplink subframes.
  • the frame structure according to the embodiment of the present invention includes a frame composed of only downlink. In case of a UE supporting TDD-FDD, CRS channel estimation is not performed in an uplink cell of a TDD frame, and thus a resource may be used in all cells when using a frame composed of only downlink.
  • FIG. 17 illustrates an example of enabling or disabling secondary cell configuration in a wireless communication system according to an embodiment of the present invention.
  • a primary cell (PCell) 1710 a primary cell (PCell) 1710, a first secondary cell 1720 (secondary cell 1, SCell 1) and a second secondary cell (Scell 2) 1730.
  • CA mode is in progress.
  • data transmission is performed through the primary cell 1710, the first secondary cell 1720, and the second secondary cell 1730.
  • the base station may determine deactivation of the second secondary cell 1720.
  • a MAC CE Media Access Control Element
  • the primary cell 1710 may switch to the idle mode.
  • FIG. 18 is a block diagram of a terminal device for performing a CA according to an embodiment of the present invention.
  • the apparatus includes a communication unit 1810, a storage 1820, and a controller 1830.
  • the wireless communication unit 1810 performs a function for transmitting and receiving a signal through a wireless channel such as band conversion and amplification of the signal. That is, the wireless communication unit 1810 up-converts the baseband signal to an RF band signal, transmits the signal through an antenna, and downconverts the RF band signal received through the antenna to the baseband signal.
  • the wireless communication unit 1810 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), and the like. . In FIG. 18, only one antenna is illustrated, but the transmitting end may include a plurality of antennas.
  • the wireless communication unit also includes a first chain 1812 and a second chain 1814.
  • the wireless communication unit 1810 may be referred to as a transmitter, a receiver, a transceiver, or a communicator.
  • the storage unit 1820 stores data such as a basic program, an application program, and setting information for the operation of the apparatus for performing the CA.
  • the storage unit 1820 may store information on whether or not the CA is supported.
  • the storage 1820 provides the stored data according to a request of the controller 1830.
  • the controller 1830 controls overall operations of the base station apparatus for performing the CA. For example, the controller 1830 transmits a signal through the communication unit 1810 to access a base station.
  • the controller controls the apparatus for performing the CA to perform the procedures illustrated in FIGS. 8, 9, 10, 11, 12, and 13. According to an embodiment of the present invention, the operation of the controller 1830 is as follows.
  • the controller 1830 controls the terminal to transmit a signal to the base station.
  • the controller transmits TDD-FDD CA support availability information to the base station through the terminal.
  • the controller provides information of a band that can be supported by the base station.
  • the controller may provide a combination of carriers to the base station.
  • the controller recognizes the TDD uplink subframe in which the CRS is not transmitted through the uplink and downlink configuration information of the TDD secondary cell received from the base station so as not to perform channel estimation in the uplink subframe.
  • 19 is a block diagram of a base station apparatus for performing a CA in a wireless communication system according to an embodiment of the present invention.
  • the apparatus includes a wireless communication unit 1910, a backhaul communication unit 1920, a storage 1930, and a controller 1940.
  • the wireless communication unit 1910 performs a function for transmitting and receiving a signal through a wireless channel such as band conversion and amplification of the signal. That is, the wireless communication unit 1910 up-converts the baseband signal to an RF band signal, transmits the signal through an antenna, and downconverts the RF band signal received through the antenna to the baseband signal.
  • the wireless communication unit 1910 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), and the like. . In FIG. 19, only one antenna is illustrated, but the transmitting end may include a plurality of antennas.
  • the wireless communication unit also includes a first chain 1912 and a second chain 1914.
  • the wireless communication unit 1910 may be referred to as a transmitter, a receiver, a transceiver, or a communicator.
  • the backhaul communication unit 1920 provides an interface for communicating with other nodes in the network. That is, the backhaul communication unit 1920 converts a bit string transmitted from the base station to another node, for example, another base station, a core network, etc. into a physical signal, and converts a physical signal received from the other node into a bit string. do.
  • the storage unit 1930 stores data such as a basic program, an application program, and setting information for the operation of the base station apparatus for performing the CA.
  • the storage unit 1930 may store information on whether the CA can be supported.
  • the storage unit 1930 provides the stored data at the request of the controller 1940.
  • the controller 1940 controls overall operations of the base station apparatus for performing CA. For example, the controller 1940 transmits a signal to the terminal through the wireless communication unit 1910.
  • the controller controls the apparatus for performing the CA to perform the procedures illustrated in FIGS. 8, 9, 10, 11, 12, and 13. According to an embodiment of the present invention, the operation of the controller 1940 is as follows.
  • the controller 1940 controls the base station to transmit a signal to the terminal.
  • the controller controls the base station to transmit uplink and downlink configuration information of the TDD secondary cell to the terminal through the TDD-FDD CA support availability information received by the base station.
  • a computer-readable storage medium for storing one or more programs (software modules) may be provided.
  • One or more programs stored in a computer readable storage medium are configured for execution by one or more processors in an electronic device.
  • One or more programs include instructions that cause an electronic device to execute methods in accordance with embodiments described in the claims or specification of the present invention.
  • Such programs may include random access memory, non-volatile memory including flash memory, read only memory (ROM), and electrically erasable programmable ROM.
  • EEPROM Electrically Erasable Programmable Read Only Memory
  • magnetic disc storage device compact disc ROM (CD-ROM), digital versatile discs (DVDs) or other forms
  • CD-ROM compact disc ROM
  • DVDs digital versatile discs
  • It can be stored in an optical storage device, a magnetic cassette. Or, it may be stored in a memory composed of some or all of these combinations.
  • each configuration memory may be included in plural.
  • the program may be configured through a communication network such as the Internet, an intranet, a local area network (LAN), a wide area network (WLAN), or a storage area network (SAN), or a combination thereof. It may be stored in an attachable storage device that is accessible. Such a storage device may be connected to a device for performing an embodiment of the present invention through an external port. In addition, a separate storage device on a communication network may be connected to a device for performing an embodiment of the present invention.
  • a communication network such as the Internet, an intranet, a local area network (LAN), a wide area network (WLAN), or a storage area network (SAN), or a combination thereof. It may be stored in an attachable storage device that is accessible. Such a storage device may be connected to a device for performing an embodiment of the present invention through an external port.
  • a separate storage device on a communication network may be connected to a device for performing an embodiment of the present invention.

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

Abstract

L'équipement terminal d'un système de communication sans fil selon un mode de réalisation de la présente invention est caractérisé en ce qu'il comprend : une unité de transmission pour transmettre, à une station de base, des informations indiquant la prise en charge d'une agrégation de porteuses (CA) à l'aide de porteuses en duplex à répartition dans le temps (TDD) et en duplex à répartition en fréquence (FDD); et une unité de réception pour recevoir, de la station de base, des informations de configuration de cellule comprenant des informations de sous-trame TDD.
PCT/KR2015/002941 2014-03-26 2015-03-26 Équipement d'échange de signaux et procédé d'agrégation de porteuses en duplex à répartition dans le temps et en duplex à répartition en fréquence dans un système de communication sans fil WO2015147557A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US15/129,289 US10313004B2 (en) 2014-03-26 2015-03-26 Signal exchange equipment and method for time division duplex and frequency division duplex carrier aggregation in wireless communication system
CN201580026690.0A CN106464352B (zh) 2014-03-26 2015-03-26 用于时分双工和频分双工载波聚合的信号交换设备和方法
EP15768291.5A EP3125440B1 (fr) 2014-03-26 2015-03-26 Équipement d'échange de signaux et procédé d'agrégation de porteuses en duplex à répartition dans le temps et en duplex à répartition en fréquence dans un système de communication sans fil

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
US201461970528P 2014-03-26 2014-03-26
US61/970,528 2014-03-26
US201461978494P 2014-04-11 2014-04-11
US61/978,494 2014-04-11
US201461983712P 2014-04-24 2014-04-24
US61/983,712 2014-04-24
KR20140053703 2014-05-02
KR10-2014-0053703 2014-05-02
KR10-2014-0054218 2014-05-07
KR1020140054218A KR102310991B1 (ko) 2014-03-26 2014-05-07 무선 통신 시스템에서 시간 분할 복신 및 주파수 복신 반송파 집성을 위한 신호 교환 장치 및 방법

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120106404A1 (en) * 2010-11-01 2012-05-03 Qualcomm Incorporated Fdd and tdd carrier aggregation
WO2013170426A1 (fr) * 2012-05-14 2013-11-21 Nokia Corporation Procédé d'indication de configuration de liaison montante-liaison descendante en duplexage par répartition temporelle
WO2014007595A1 (fr) * 2012-07-06 2014-01-09 Samsung Electronics Co., Ltd. Procédé et appareil pour déterminer une configuration de liaison montante-liaison descendante de duplex à répartition dans le temps applicable pour des trames radio

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120106404A1 (en) * 2010-11-01 2012-05-03 Qualcomm Incorporated Fdd and tdd carrier aggregation
WO2013170426A1 (fr) * 2012-05-14 2013-11-21 Nokia Corporation Procédé d'indication de configuration de liaison montante-liaison descendante en duplexage par répartition temporelle
WO2014007595A1 (fr) * 2012-07-06 2014-01-09 Samsung Electronics Co., Ltd. Procédé et appareil pour déterminer une configuration de liaison montante-liaison descendante de duplex à répartition dans le temps applicable pour des trames radio

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* Cited by examiner, † Cited by third party
Title
CATT: "Half duplex UE operation for FDD-TDD CA", R1-140105, 3GPP TSG-RAN WG1 MEETING #76, 31 January 2014 (2014-01-31), Prague, Czech Republic, XP050735670 *
See also references of EP3125440A4 *
TEXAS INSTRUMENTS: "On L1 signaling for dynamic TDD UL/DL reconfiguration", R1-140531, 3GPP TSG-RAN WG1 MEETING #76, 1 February 2014 (2014-02-01), Prague, Czech Republic, XP050736063 *

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