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WO2011047616A1 - Procédé, appareil et système de relais - Google Patents

Procédé, appareil et système de relais Download PDF

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Publication number
WO2011047616A1
WO2011047616A1 PCT/CN2010/077866 CN2010077866W WO2011047616A1 WO 2011047616 A1 WO2011047616 A1 WO 2011047616A1 CN 2010077866 W CN2010077866 W CN 2010077866W WO 2011047616 A1 WO2011047616 A1 WO 2011047616A1
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WO
WIPO (PCT)
Prior art keywords
repeater
relay
division duplex
mode
base station
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2010/077866
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English (en)
Chinese (zh)
Inventor
王燚
张伟
陈小锋
白伟
万蕾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2011047616A1 publication Critical patent/WO2011047616A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15564—Relay station antennae loop interference reduction
    • 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
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H04B7/2656—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst

Definitions

  • a relay method, device and system The present application claims priority to Chinese Patent Application No. 200910180532.7, entitled “Relay Method, Equipment and System", filed on October 19, 2009, with the Chinese Patent Office. The entire contents of which are incorporated herein by reference.
  • the present invention relates to the field of wireless communication technologies, and in particular, to a relay method, device, and system.
  • a link between a base station and a repeater is called a relay backhaul link
  • a link between the repeater and a terminal served by the repeater is called a relay access. link.
  • the base station sends a downlink data packet to the repeater through the relay backhaul link, and receives the uplink data packet sent by the relay device; the relay device sends the downlink data packet to the terminal it serves through the relay access link, and receives the downlink data packet.
  • the uplink packet sent by the corresponding terminal is a link between a base station and a repeater through the relay backhaul link, and receives the uplink data packet sent by the relay device.
  • embodiments of the present invention provide a relay method, device, and system, which can avoid loopback self-interference in a relay process.
  • An embodiment of the present invention provides a relay method, where the method includes: The improved repeater communicates with the base station in a first manner;
  • the improved repeater and the terminal served by the improved repeater communicate in a second manner;
  • the first mode is a time division duplex mode
  • the second mode is a frequency division duplex mode.
  • the first mode is a frequency division duplex mode
  • the second mode is a time division duplex mode.
  • the embodiment of the present invention further provides a repeater, where the repeater includes: a first relay unit, configured to communicate with a base station in a first manner; and a second relay unit, configured to be in the first The relay unit communicates with the base station in the first manner, and communicates with the terminal served by the repeater in the second manner;
  • the first mode is a time division duplex mode
  • the second mode is a frequency division duplex mode.
  • the first mode is a frequency division duplex mode
  • the second mode is a time division duplex mode.
  • An embodiment of the present invention further provides a communication system, where the system includes a base station, a repeater, and a terminal served by the repeater.
  • the second mode is used for communication between the repeater and the base station by using the first mode.
  • the first mode is a time division duplex mode.
  • the second mode is a frequency division duplex mode; or the first mode is a frequency division duplex mode, and the second mode is a time division duplex mode.
  • the technical solution provided by the embodiment of the present invention realizes communication between the base station and the repeater, between the repeater and the corresponding terminal by the cooperation of the time division duplex mode and the frequency division duplex mode, and effectively solves the relay.
  • the loopback self-interference problem in the system realizes high-quality relay communication and satisfies the needs of users.
  • the technical solution of the embodiment of the present invention fully utilizes the resources of the existing time division duplex system and the frequency division duplex system, and does not need to reserve specific system resources when performing relaying, and does not need to add additional relay equipment, and the maximum The system's capacity is increased to a large extent, reducing the cost and consumption of the system.
  • FIG. 1 is a schematic diagram of a self-interference in a time-division manner to avoid loopback according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of implementing in-band relay by using TDD/FDD in an FDD LTE system according to Embodiment 2 of the present invention
  • FIG. 3 is a schematic diagram of implementing in-band relay by using TDD/FDD in a TDD LTE system according to Embodiment 2 of the present invention
  • FIG. 4 is a schematic diagram of implementing an outband relay by using TDD/FDD in an FDD LTE system according to Embodiment 2 of the present invention
  • FIG. 5 is a schematic diagram of implementing an outband relay by using TDD/FDD in a TDD LTE system according to Embodiment 2 of the present invention
  • FIG. 6 is a schematic diagram of a unidirectional relay method according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic diagram of a frequency band allocation in a unidirectional relay mode according to Embodiment 2 of the present invention
  • FIG. 8 is a schematic diagram of a frame structure in a unidirectional relay mode according to Embodiment 2 of the present invention
  • FIG. 8 is a schematic diagram of a special subframe in a one-way relay mode according to Embodiment 2 of the present invention.
  • FIG. 9 is a schematic diagram of a principle of a relay method according to Embodiment 2 of the present invention.
  • FIG. 10 is a schematic diagram of bandwidth allocation according to Embodiment 2 of the present invention.
  • FIG. 11 is a schematic structural diagram of a frame according to Embodiment 2 of the present invention.
  • FIG. 12 is a schematic structural diagram of another frame according to Embodiment 2 of the present invention.
  • FIG. 13A is a schematic structural diagram of a repeater according to Embodiment 3 of the present invention.
  • FIG. 13B is a schematic structural diagram of another repeater according to Embodiment 3 of the present invention
  • FIG. 14 is a schematic structural diagram of a relay communication module according to Embodiment 3 of the present invention
  • FIG. 15 is a schematic structural diagram of still another relay communication module according to Embodiment 3 of the present invention.
  • a solution provided by the embodiment of the present invention is to use a time division duplex (TDD) method to distinguish two links in the time domain, that is, to allow the repeaters to transmit and receive at different times.
  • TDD time division duplex
  • a Multi-media Broadcast over a Single Frequency Network is reserved in a radio frame structure configured for a repeater.
  • MBSFN base station and repeater
  • NB-to-relay base station and repeater
  • the resources of the system are occupied, which limits the capacity of the system.
  • the physical resources reserved for the MBSFN subframe are used alone as base station-to-repeater communication, they can no longer be used as relay-to-terminal communication, and when the system capacity needs to be increased, the system capacity is limited;
  • the process of the hybrid automatic repeat request (HQQ) of the MBSFN sub-frame between the base station, the repeater, and the terminal needs to be considered at the same time, the HARQ coordination is complicated, the delay is increased, and the repeater node is limited. Capacity and number of users.
  • Another solution provided by the embodiment of the present invention is a frequency division duplex (FDD) mode, in which a repeater is separately configured with a microwave backhaul system with a special proprietary protocol, and the microwave backhaul system utilizes an additional frequency band to implement the base station to Repeater communication.
  • FDD frequency division duplex
  • this method is currently only applied in the microwave backhaul system, which belongs to the point-to-point transmission mode.
  • Each relay backhaul link requires a set of backhaul transceivers.
  • the base station side is undoubtedly greatly increased.
  • Equipment cost Moreover, after the microwave frequency band is used for the relay link, the channel quality is still poor, which is far from the line-of-sight requirement and cannot achieve the desired effect.
  • a relay method the method comprising:
  • the improved repeater communicates with the base station in a first manner
  • the improved repeater and the terminal served by the improved repeater communicate in a second manner;
  • the first mode is a TDD mode
  • the second mode is an FDD mode.
  • the first mode is an FDD mode
  • the second mode is a TDD mode.
  • the improved repeater of the present invention needs to simultaneously support communication of data on the time division frequency band and the frequency division frequency band.
  • the improved repeater is simply referred to as a repeater.
  • the relay method provided by the embodiment of the present invention can be applied to an LTE system, an LTE-Advanced (LTE-A) system, but is not limited thereto, and the embodiment of the present invention can also be used for other access devices and a macro base station.
  • Backhaul connections of access devices in a common networking scenario such as the micro-area Micro, 3 ⁇ 4 cell Pico and home base station Femeto backhaul connection, can also be used in two duplex mode systems in subsequent LTE-A systems and other wireless communication systems.
  • the working mode of the hybrid networking can also be used for the working mode of the common networking of different frequency bands in the same duplex mode.
  • the devices involved in performing the foregoing relay method may be different.
  • the method may be:
  • the repeater Communicating in a first manner between the evolved base station (eNB) and the repeater; communicating in a second manner between the repeater and the terminal served by the repeater; wherein, the first The mode is the TDD mode, and the second mode is the FDD mode.
  • the first mode is the FDD mode
  • the second mode is the TDD mode.
  • the repeater needs to support TDD at the same time.
  • the processing of the data in the mode and the processing of the data in the FDD mode, and the communication of the corresponding data in the TDD mode and the FDD mode to ensure that the data is relayed when the relay backhaul link and the relay access link are respectively relayed in different manners. Normal transmission.
  • the same description applies equally to the relevant content below.
  • the technical solution provided by the embodiment of the present invention realizes communication between the base station and the repeater, between the repeater and the corresponding terminal by the cooperation of the TDD mode and the FDD mode, and effectively solves the loopback in the relay system. Interference problems, high-quality relay communication, to meet the needs of users. Moreover, the technical solution of the embodiment of the present invention fully utilizes resources of the existing TDD system and the FDD system, and does not need to reserve specific system resources when performing relaying, and does not need to add additional relay devices, thereby maximizing the system. The capacity reduces the cost and consumption of the system.
  • the relay method provided in the second embodiment of the present invention is described in detail below.
  • the second embodiment of the present invention is mainly described by using a scenario in LTE as an example.
  • the TDD and FDD systems in the existing LTE standard protocols are quite the same to a considerable extent.
  • the physical layer has a similar frame structure, has the same pilot pattern and modulation and coding mode, and has the same L2 layer.
  • the user plane protocol stack has the same L3 protocol stack, and the similarity on the protocol ensures the communication on the device.
  • the embodiment of the present invention does not need to perform large hardware modification on existing devices in the TDD and FDD systems, and completes the evolved base station to relay (eNB-relay) and repeater through the cooperation of the same devices. Communication between terminals (relay-UE) avoids loopback self-interference between the relay backhaul link and the relay access link.
  • FIG. 2 a schematic diagram of implementing in-band relay by using TDD/FDD in a macro base station overlay network composed of an FDD LTE system.
  • communication is performed between the eNB and the repeater and between the eNB and the terminal in the same manner (FDD).
  • FDD Frequency Division Duplex
  • the eNB-relay relay communication is provided by the FDD LTE method
  • the relay-UE communication is implemented by the TDD LTE method.
  • FIG. 3 a schematic diagram of implementing in-band relay by TDD/FDD in a macro base station overlay network composed of a TDD LTE system.
  • communication is performed between the eNB and the repeater and between the eNB and the terminal in the same manner (TDD).
  • TDD Time Division Duplex
  • eNB-relay relay communication is provided by TDD LTE mode
  • relay-UE communication is implemented by FDD LTE mode.
  • TDD/FDD is utilized in the macro base station overlay network formed by the FDD LTE system.
  • TDD repeater
  • FDD the terminal
  • the eNB-relay relay communication is provided through the TDD LTE mode, and the relay-UE communication is implemented by the FDD LTE method.
  • FIG. 5 a schematic diagram of implementing out-of-band relay by using TDD/FDD in a macro base station overlay network composed of a TDD LTE system.
  • communication between the eNB and the repeater (FDD) and between the eNB and the terminal (TDD) is performed in different ways.
  • the eNB-relay relay communication is provided by the FDD LTE mode
  • the relay-UE communication is implemented by the TDD LTE mode.
  • the communication links at both ends of the repeater respectively use different system spectrum resources to avoid performance loss caused by co-channel interference; and, the relay backhaul link and the relay access link respectively adopt TDD/FDD
  • the spectrum resources maximize the capacity of the original LTE system, and effectively utilize the cheaper TDD spectrum resources.
  • the TDD single-mode terminal roaming can be realized at a low cost by the TDD relay coverage method.
  • the technical solution provided by the embodiment of the present invention realizes communication between the base station and the repeater, between the repeater and the corresponding terminal by the cooperation of the TDD mode and the FDD mode, and effectively solves the loopback in the relay system. Interference problems, high-quality relay communication, to meet the needs of users. Moreover, the technical solution of the embodiment of the present invention fully utilizes resources of the existing TDD system and the FDD system, and does not need to reserve specific system resources when performing relaying, and does not need to add additional relay devices, thereby maximizing the system. The capacity reduces the cost and consumption of the system. Further, a relay method provided in Embodiment 2 of the present invention is described in detail below.
  • the repeater supports one-way transmission of the eNB-relay-UE or one-way transmission of the UE-relay-eNB at the same time, that is, the repeater adopts a one-way relay (one- Mode of the way-relay), in the first moment, only the repeater is allowed to receive the data transmitted by the eNB/NB in the first manner and the repeater transmits the data to the terminal in the second manner; Only allowing the repeater to receive data transmitted by the terminal in the first manner and the repeater passes the second mode Transmitting data to the eNB/NB; wherein the first moment and the second moment are different moments.
  • FIG. 6 is a schematic diagram of a one-way relay method according to an embodiment of the present invention.
  • the repeater supports eNB -> relay -> UE downlink communication, that is, the eNB-relay downlink communication link occupies the FDD downlink spectrum; the relay-UE downlink communication link occupies the TDD downlink spectrum;
  • the repeater supports the eNB ⁇ -relay ⁇ -UE uplink communication, that is, the eNB-relay uplink communication link, occupies the FDD uplink spectrum, and the relay-UE uplink communication link occupies the FDD uplink frequency.
  • the time i and the time j are different times.
  • the carrier frequency of the repeater is the TDD carrier frequency and the FDD downlink carrier frequency;
  • the carrier frequency of the repeater is the TDD carrier frequency and the FDD uplink carrier frequency.
  • the repeater switches the carrier at the TDD carrier frequency point and the FDD carrier frequency point at different times, so that the repeater time i transmits data on the time division duplex frequency band, and the time j transmits data on the frequency division duplex, or
  • the repeater time i transmits data on the frequency division duplex band
  • the time j transmits data on the time division duplex
  • the repeater time i receives the data on the time division duplex band
  • the time j receives the data on the frequency division duplex.
  • the repeater time i receives data on the frequency division duplex band
  • the time j receives data on the time division duplex, thereby ensuring that the repeater uses the same frequency band when transmitting data or receiving data.
  • Figure 6 shows only a spectrum allocation method. It is also possible that the link between the eNB and the relay occupies the TDD spectrum, and the link between the relay and the UE occupies the FDD spectrum.
  • a guard band is set in the adopted TDD band and FDD band ( Guard Band).
  • the relay can send and receive data at the same time, and the relay backhaul link needs to perform corresponding HARQ configuration according to the uplink and downlink configuration of the TDD spectrum, that is, when the downlink access link adopts TDD in the downlink direction, the relay backhaul link
  • the downlink frame of the FDD is used.
  • the uplink frame of the FDD is used for the relay backhaul link.
  • the relay can be regarded as a half-duplex FDD mode, and the relay backhaul link needs to modify the HARQ timing according to the TDD uplink and downlink configuration of the relay access link, and the TDD corresponding subframe of the repeater needs to be associated with the eNB.
  • the corresponding subframe remains synchronized.
  • FIG. 8 a schematic diagram of a frame structure in a one-way relay mode is shown.
  • the scenario in which the TDD frame structure of the repeater is configured as Configure #1 is taken as an example.
  • the block diagram of the first row shows the downlink frame structure in the FDD mode of the eNB
  • the block diagram of the second row shows the structure of the uplink frame in the FDD mode of the eNB
  • the block diagram of the third row shows a frame structure of the repeater, for each frame structure.
  • a row from left to right represents the 0th subframe to the 9th subframe in order.
  • the D in the box indicates that the box represents the downlink subframe
  • U indicates that the box represents the uplink subframe
  • S indicates that the box represents the special subframe.
  • the solid arrows in the figure indicate that the current subframe belongs to the sync/broadcast/paging sub-frame, which is the sub-frame that the system must transmit, and the dashed arrow is a general sub-frame, such as a data frame.
  • the arrow down indicates that the subframe is transmitted in the downstream direction
  • the arrow upward indicates that the subframe is transmitted in the upstream direction.
  • the different padding textures in the block are used to distinguish different subframes, and the blocks with the same padding texture have corresponding relationships.
  • the repeater can transmit the FDD uplink of the eNB to the 0th and 1st subframes of the FDD downlink from the eNB.
  • the seventh subframe performs feedback and the like, thereby clearly showing the HARQ of the relay backhaul link and the HARQ of the relay access link in the one-way relay mode, and the configured HARQ can be received when the repeater receives
  • the downlink subframe from the base station is used, feedback can be performed on the corresponding uplink subframe, and when the uplink subframe is sent to the base station, the feedback can be confirmed by receiving feedback from the downlink subframe of the base station.
  • the repeater sends a downlink subframe to the terminal, it can receive feedback from the terminal in the corresponding uplink subframe, and can receive the downlink subframe sent to the terminal when receiving the uplink subframe sent by the terminal. Feedback is confirmed.
  • the repeater After receiving the synchronization/broadcast/paging sub-frame from the eNB, the repeater displays the 0th subframe (filled with square cells) and the 4th subframe (filled) as shown in the first line of FIG. There is a diamond small grid), the 5th subframe (filled with a left diagonal grid), the 9th subframe (filled with a right diagonal grid), and simultaneously send its own synchronization/broadcast/paging sub-frame, as shown in Figure 8 The 0th, 1st, 5th, and 6th subframes displayed by the line.
  • the TDD subframe of the repeater can synchronize the FDD subframe of the eNB.
  • the repeater in the one-way relay mode sends a special subframe through the TDD method, because The UPPTS symbol exists in the special subframe to receive the uplink synchronization data.
  • the base station is transmitting the downlink data to the repeater through the downlink subframe of the FDD mode, so that the repeater needs to simultaneously receive the downlink data from the base station and the terminal. Uplink data, causing a collision of one-way transmission of the repeater.
  • the FDD downlink subframe of the base station may be configured as an MBSFN subframe at a corresponding TDD special subframe time. As shown in FIG.
  • the FDD downlink subframe corresponding to the TDD special subframe including the UPPTS is configured as The MBSFN subframe consisting of the physical downlink control channel subframe (PDCCH) and the physical multicast channel (PMCH) subframe, so that the repeater does not receive the downlink data from the base station while receiving the uplink data from the terminal, thereby avoiding Receiving a collision; or as shown in FIG. 8D, the downlink symbol of the FDD downlink subframe on the base station corresponding to the time when the UPPTS symbol of the TDD special subframe is corresponding may be removed, for example, by masking the downlink symbol, by not transmitting the downlink data. Avoid receiving conflicts with repeaters.
  • PDCCH physical downlink control channel subframe
  • PMCH physical multicast channel
  • the technical solution provided by the embodiment of the present invention realizes communication between the base station and the repeater, between the repeater and the corresponding terminal by the cooperation of the TDD mode and the FDD mode, and effectively solves the loopback in the relay system.
  • the interference problem has achieved a good relay effect.
  • the technical solution of the embodiment of the present invention fully utilizes resources of the existing TDD system and the FDD system, and does not need to reserve specific system resources when performing relaying, and does not need to add additional relay equipment, thereby maximizing the system.
  • the capacity reduces the cost and consumption of the system.
  • another relay method provided by the second embodiment of the present invention is described in detail below. In the second embodiment of the present invention, referring to FIG.
  • the TDD mode can be adopted between the NB/eNB and the repeater, and the FDD mode can be adopted between the repeater and the terminal.
  • the repeater supports receiving data transmitted by the eNB and transmitting by the receiving terminal.
  • the eNB-relay downlink communication link occupies the FDD downlink spectrum;
  • the relay-UE uplink communication link occupies the uplink subframe of the HFDD DL;
  • the repeater supports the repeater to send data to and transmit data to the eNB, and the uplink communication link on the eNB-relay uplink communication link; the relay-UE uplink communication link occupies HFDD UL
  • the HFDD frequency band may be a TDD frequency band or an FDD frequency band.
  • the repeater cannot receive data at the same time.
  • the uplink and downlink subframes of the physical frame of the eNB and the relay are complementary at the same time, that is, the relay receives the downlink frame from the eNB.
  • the setting of the HARQ timing when the TDD frame structure of Configure #0 is used is shown. Because the repeater receives the synchronization/broadcast/paging sub-frame from the eNB, such as the 0th, 4th, 5th, and 9th subframes, the repeater cannot send the repeater's synchronization/broadcast/paging to the terminal.
  • Subframes such as 0th, 1st, 5th, and 6th subframes, so shifting through the subframe is required, so that the FDD downlink frame of the eNB and the TDD downlink frame of the repeater are staggered in the sending direction, at least making the FDD
  • the 0, 5 subframes on the spectrum and the 0, 5 subframes on the TDD spectrum are staggered in the transmission direction, and the corresponding downlink frame is not transmitted to the terminal even after the relay receives the downlink frame from the eNB.
  • the 0, 4, 5, and 9 subframes of the repeater can be completely shifted by the 0, 1, 5, and 6 subframes of the eNB by shifting the two subframes, and the other configured TDD subframes are shifted by shift.
  • the two subframes cannot be completely staggered. If the 4th and 9th subframes cannot be staggered, the corresponding paging information can be placed on the 0th and 5th subframes.
  • the setting of the HARQ timing when the TDD frame structure of Configure #2 is employed is shown.
  • TDD configuration #2 you can adjust the repeater by shifting three subframes.
  • Configuring HARQ for the shifted subframe so that when the repeater receives the downlink subframe from the base station, it can perform feedback on the corresponding uplink subframe, and when transmitting the uplink subframe to the base station, It can be confirmed by receiving feedback from the downlink subframe of the base station.
  • the repeater sends a downlink subframe to the terminal, it can receive feedback from the terminal in the corresponding uplink subframe, and can receive the downlink subframe sent to the terminal when receiving the uplink subframe sent by the terminal. Feedback is confirmed.
  • the half-duplex FDD can be configured with the uplink and downlink configuration to design the HARQ timing.
  • the HARQ configuration mode shown in FIG. 8, 11, and 12 is only an exemplary setting, and the configuration of the HARQ is different for different configured TDD subframes, when adopting HARQ compatible with the existing relay system. In the manner, the manner of reconfiguring HARQ with the relay system according to the embodiment of the present invention is also different.
  • the technical solution provided by the embodiment of the present invention realizes communication between the base station and the repeater, between the repeater and the corresponding terminal by the cooperation of the TDD mode and the frequency division duplex mode, and effectively solves the problem in the relay system.
  • the self-interference problem of the loopback achieves a better relay effect.
  • the technical solution of the embodiment of the present invention fully utilizes resources of the existing TDD system and the frequency division duplex system, and does not need to reserve specific system resources when performing relaying, and does not need to add additional relay devices, to the greatest extent. Increased system capacity reduces system cost and consumption.
  • a third embodiment of the present invention provides a repeater, where the repeater includes:
  • a first relay unit configured to communicate with the base station in a first manner
  • a second relay unit configured to: when the first relay unit communicates with the base station in the first manner, using the second mode Communicating between terminals served by the repeater
  • the first mode is a TDD mode
  • the second mode is a frequency division duplex mode.
  • the first mode is a frequency division duplex mode
  • the second mode is a TDD mode.
  • the repeater further includes a configuration module, configured to configure a HARQ timing of the subframe of the base station and a subframe of the repeater to satisfy the HARQ between the base station and the repeater, and the middle HARQ between the relay and the terminal served by the repeater.
  • the repeater further includes: a time division transceiver module 131 and a frequency division transceiver module 132,
  • the time division transceiver module 131 is configured to enable the first relay unit to communicate with the base station by using a time division duplex mode, and to enable the second relay unit to use frequency division in the first relay unit and the base station. While communicating in the duplex mode, the time division duplex mode is used to communicate with the terminal served by the repeater;
  • the frequency division transceiver module 132 is configured to enable the first relay unit to communicate with the base station by using a frequency division duplexing manner, and to enable the second relay unit to be used by the first relay unit and the base station. While communicating in the time division duplex mode, the frequency division duplex mode is used to communicate with the terminal served by the repeater.
  • the first relay unit further includes a time division baseband processing unit 133
  • the second relay unit further includes a frequency division baseband processing unit 134
  • the first relay unit further includes a frequency division baseband processing unit.
  • the second relay unit further includes a time division baseband processing unit 133, which is illustrated by a broken line in FIG. 13A.
  • the time division baseband processing unit 133 is configured to receive data from the time division transceiver module, perform corresponding processing, and then send the data to the frequency division baseband processing unit, or receive data from the frequency division baseband processing unit, and perform corresponding After processing, sending to the time division transceiver module;
  • the frequency division baseband processing unit 134 is configured to receive data from the frequency division transceiver module, perform corresponding processing, and send the data to the time division baseband processing unit, or receive data from the time division baseband processing unit, and perform corresponding After processing, it is sent to the frequency division transceiver module.
  • the time division baseband unit (BBU) 133 and the frequency division baseband processing unit 134 can communicate with each other to ensure interaction between the time division mode and the corresponding data in the frequency division mode.
  • the first relay unit or the second relay unit may be implemented by the relay communication module shown in FIG.
  • the time division transceiver module 131 can be implemented by a TDD switch (TDD SWITCH), and the time division baseband processing unit 133 is configured to process data in a time division manner.
  • the frequency division transceiver module 132 can be implemented by a duplexer (Duplexer). Frequency division baseband processing list Element 134 is used to process data in frequency division mode.
  • Figure 14 also shows some required units in TDD mode and in FDD mode, such as digital / analog (D / A) conversion module, analog / digital (A / D) conversion module, oscillator (Oscilator ), TDD Carrier Frequency PLL, FDD Carrier Frequency PLL, Power Amplifier (PA) and Low Noise Amplifier (LNA), etc., are omitted in Figures 14 and 15.
  • D / A digital / analog
  • a / D analog / digital
  • Oscilator oscillator
  • TDD Carrier Frequency PLL TDD Carrier Frequency PLL
  • FDD Carrier Frequency PLL Power Amplifier
  • LNA Low Noise Amplifier
  • the repeater can complete the communication between the two links of the relay backhaul link and the relay access link in a half-duplex manner while satisfying the relay capacity requirement.
  • the relay only supports unilateral communication of the relay backhaul link and the relay access link at the same time.
  • the repeater can complete the relay backhaul link and the relay access chain by using one transceiver.
  • the repeater further includes a mixing transceiver module 135 and a mixing baseband processing unit 136.
  • the mixing and receiving module 135 is configured to enable the first relay unit to communicate with the base station in a first manner, and to enable the second relay unit to adopt the first in the first relay unit and the base station. While communicating in a manner, communication is performed between the terminal served by the repeater in a second manner.
  • the above-described mixing baseband processing unit 136 has a function of simultaneously processing data in the time division band and data in the frequency division band.
  • the repeater further includes a first relay control module or a second relay control module according to different processing manners during relaying.
  • the first relay control module is configured to allow only the first relay unit to receive downlink data sent by the base station in a first manner and the second relay unit to use a second manner at a first moment And transmitting, by the second relay unit, the uplink data sent by the terminal by using the second manner, and the first relay unit sending the uplink data by using the first manner.
  • the repeater further includes: a first special subframe configuration module, configured to configure, in a special subframe in the time division duplex mode, a downlink subframe of a frequency division duplex mode corresponding to the special subframe as a multicast multicast single frequency network
  • a special subframe configuration module configured to remove the downlink symbol in the downlink subframe for the special subframe in the time division duplex mode, to avoid the uplink pilot subframe UPPTS according to the special subframe of the relay receiving terminal
  • the HFDD method when the relay device performs relaying, the HFDD method may also be adopted. In this manner, it is not necessary to set a guard frequency band between the TDD frequency band and the FDD frequency band, and only the repeater is allowed to receive data at one time. Or transmitting the data at the same time, in which the second relay control module may be configured to allow only the first relay unit to receive the downlink data sent by the base station in the first manner and the The second relay unit receives the uplink data sent by the terminal in the second manner; at the second time, the first relay unit is only allowed to send the uplink data to the base station and the second relay unit in the first manner.
  • the downlink data is sent to the terminal in a second manner, where the first time and the second time are different times.
  • the repeater further includes:
  • a subframe shifting module configured to shift a subframe in the time division duplex mode of the base station or the relay, so that when the repeater receives a synchronization/broadcast/paging subroutine from the base station At the time of the frame, the repeater does not transmit the synchronization/broadcast/paging sub-frame of the repeater to the corresponding terminal.
  • the processing of data under TDD and FDD can be implemented by the BBU.
  • the mixing transceiver module is implemented by a radio processing device such as Duplexes, and the single-link relay time division/frequency division switch (Single-Link Relay Switch TDD) /FDD ) Enables switching at different carrier frequencies.
  • the repeater only needs one set of uplink and downlink radio equipment, and at the same time can ensure reuse of the TDD spectrum under the condition of avoiding adjacent frequency interference, so the eNB system of the original LTE can be utilized.
  • the structure can complete the communication functions of the two links of eNB-relay and relay-UE.
  • the BBU in the relay unit has both TDD LTE functions for TDD LTE data processing and FDD LTE functions for FDD LTE data processing, and Duplexer simultaneously processes signals in the TDD LTE and FDD LTE bands.
  • the repeater in this structure can simultaneously perform communication between two systems, TDD LTE and FDD LTE. For example, for a relay backhaul link, the repeater performs data communication in the TDD mode through the TDD LTE function of the BBU, in the BBU. After receiving the data of the relay backhaul link, the data is forwarded to the FDD LTE function for processing, and the data communication of the relay access link is completed by the FDD LTE function.
  • each functional module and unit in the device embodiment of the present invention refers to the method embodiment of the present invention.
  • the functional modules and units in the device embodiment of the present invention may be implemented separately or integrated in one or more units.
  • An embodiment of the present invention further provides a communication system, where the system includes a base station, a relay, and a terminal served by the repeater, and the first mode is used for communication between the base station and the repeater; The second mode is used for communication between the repeater and the terminal served by the repeater; or the second mode is used for communication between the base station and the repeater; The first mode is used for communication between the repeater and the terminal served by the repeater.
  • the technical solution provided by the embodiment of the present invention realizes communication between the base station and the repeater, between the repeater and the corresponding terminal by the cooperation of the time division duplex mode and the frequency division duplex mode, and effectively solves the relay.
  • the loopback self-interference problem in the system realizes high-quality relay communication and satisfies the needs of users.
  • the technical solution of the embodiment of the present invention fully utilizes the resources of the existing time division duplex system and the frequency division duplex system, and does not need to reserve specific system resources when performing relaying, and does not need to add additional relay equipment, and the maximum The system's capacity is increased to a large extent, reducing the cost and consumption of the system.
  • the present invention can be implemented by means of software plus the necessary general hardware platform. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, can be embodied in the form of a software product, the computer soft
  • the product may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform various embodiments of the present invention or The method described in certain sections of the examples.

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

Abstract

La présente invention concerne un procédé, un appareil et un système de relais se rapportant au domaine technique des télécommunications. Elle permet de résoudre le problème de l'auto-brouillage dans un réseau en boucle au moment du relais, sans qu'il soit nécessaire de réserver des ressources système particulières ni d'ajouter un quelconque équipement de relais supplémentaire. De cette façon, la capacité du système est optimisée, et le coût ainsi que la consommation dudit système sont réduits. Le procédé de relais selon l'invention se déroule de la manière suivante : le relais perfectionné communique avec la station de base (BS) au moyen d'une première technique; lorsque ledit relais perfectionné communique avec ladite BS au moyen de la première technique, il communique avec l'équipement d'utilisateur qu'il dessert à l'aide d'une seconde technique. Ladite première technique est un duplexage par répartition dans le temps (TDD) et ladite seconde technique est un duplexage par répartition en fréquence (FDD); sinon, ladite première technique est un FDD et ladite seconde technique est un TDD. Les modes de réalisation de la présente invention s'appliquent aux systèmes de communication nécessitant un relais, tels que les systèmes basés sur la technologie d'évolution à long terme (LTE) et les systèmes basés sur la technologie d'évolution à long terme avancée (LTE-A).
PCT/CN2010/077866 2009-10-19 2010-10-19 Procédé, appareil et système de relais Ceased WO2011047616A1 (fr)

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