WO2012072009A1 - Procédé, système et dispositif de communication à duplexage par répartition dans le temps - Google Patents

Procédé, système et dispositif de communication à duplexage par répartition dans le temps Download PDF

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Publication number
WO2012072009A1
WO2012072009A1 PCT/CN2011/083009 CN2011083009W WO2012072009A1 WO 2012072009 A1 WO2012072009 A1 WO 2012072009A1 CN 2011083009 W CN2011083009 W CN 2011083009W WO 2012072009 A1 WO2012072009 A1 WO 2012072009A1
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WO
WIPO (PCT)
Prior art keywords
subframe
uplink
downlink
variable
fixed
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Application number
PCT/CN2011/083009
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English (en)
Chinese (zh)
Inventor
潘学明
孙韶辉
肖国军
秦飞
沈祖康
丁昱
Original Assignee
大唐移动通信设备有限公司
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Publication date
Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Publication of WO2012072009A1 publication Critical patent/WO2012072009A1/fr

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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
    • H04B7/2643—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

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method, system and device for time division duplex communication. Background technique
  • the TDD (Time Division Duplex) mode refers to the use of the same working frequency band on the uplink and downlink, and the uplink and downlink signals are transmitted at different time intervals.
  • GP Guard Period
  • FDD (Frequency Division Duplex) mode means that the uplink and downlink use different working bands, and can perform uplink and downlink on different frequency carriers at the same time.
  • GB guard bandwidth
  • a radio frame has a length of 10 ms and contains 10 sub-frames, including a special sub-frame and a regular sub-frame. Each sub-frame is Lms.
  • the special subframe is divided into three sub-frames: DwPTS (Downlink Pilot Slot) is used to transmit PSS (Primary Synchronization Signal), PDCCH (Physical Downlink Control Channel), PHICH ( Physical HARQ Indication Channel, physical hybrid automatic request retransmission indication channel, PCFICH (Physical Control Format Indication Channel), PDSCH (Physical Downlink Shared Channel), etc.; GP is used for downlink UpPTS (Uplink Pilot Slot) is used to transmit SRS (Sounding Reference Signal), PRACH (Physical Random Access Channel), etc. .
  • the regular subframe includes an uplink subframe and a downlink subframe, and is used for transmitting an uplink control channel, a downlink control channel, and service data.
  • two special subframes can be configured, or a special subframe (located in subframe 1) can be configured.
  • Subframe 0 and subframe 5 and DwPTS subframes in special subframes are always used for downlink transmission.
  • Subframe 2 and UpPTS subframes in special subframes are always used for uplink transmission.
  • Other subframes can be configured as needed. For uplink transmission or downlink transmission.
  • the uplink and downlink transmissions use the same frequency resource, and the uplink signal and the downlink signal are transmitted on different subframes.
  • TD-SCDMA Time Division Synchronous Code Division Multiple Access
  • 3G third generation communication system
  • TD-LTE fourth generation communication system
  • uplink and downlink subframes The division is static Or semi-static, the usual practice is to determine the proportion of the uplink and downlink subframes according to the cell type and the approximate service ratio in the network planning process and keep unchanged. This is a relatively simple approach in the context of large coverage of macro cells, and is also more effective.
  • the embodiments of the present invention provide a method, a system, and a device for time division duplex communication, which are used to solve the problem that the division of the uplink and downlink subframes existing in the prior art is fixed after being determined, and cannot meet the requirements of services in the cell. .
  • the network side determines a subframe in the radio frame, where the radio frame includes a variable subframe, a downlink fixed subframe, and an uplink fixed subframe, where the downlink fixed subframe is a subframe in which the transmission direction is the downlink direction and the transmission direction is fixed. And the downlink pilot time slot in the special subframe, where the uplink fixed subframe is a subframe in which the transmission direction is the uplink direction and the transmission direction is fixed, and the variable subframe is a subframe with a variable transmission direction;
  • the network side communicates with the terminal according to the subframe in the radio frame.
  • the terminal determines a subframe in the radio frame, where the radio frame includes a variable subframe, a downlink fixed subframe, and an uplink fixed subframe, where the downlink fixed subframe is a subframe in which the transmission direction is the downlink direction and the transmission direction is fixed. And the downlink pilot time slot in the special subframe, where the uplink fixed subframe is a subframe in which the transmission direction is the uplink direction and the transmission direction is fixed, and the variable subframe is a subframe with a variable transmission direction;
  • the terminal communicates with the network side according to the subframe in the radio frame.
  • a first subframe determining module configured to determine a subframe in a radio frame, where the radio frame includes a variable subframe, a downlink fixed subframe, and an uplink fixed subframe, where the downlink fixed subframe is a downlink direction and transmits a subframe with a fixed direction and a downlink pilot slot in a special subframe, where the uplink fixed subframe is a subframe in which the transmission direction is the uplink direction and the transmission direction is fixed, and the variable subframe is a variable transmission direction. frame;
  • the first communication module is configured to communicate with the terminal according to the subframe in the radio frame.
  • a second determining module configured to determine a subframe in the radio frame, where the radio frame includes a variable subframe, a downlink fixed subframe, and an uplink fixed subframe, where the downlink fixed subframe is a downlink direction and a fixed transmission direction
  • the unchanged subframe, and the downlink pilot slot in the special subframe the uplink fixed subframe is the uplink direction and the transmission direction a fixed subframe
  • the variable subframe is a subframe with a variable transmission direction;
  • the second communication module is configured to communicate with the network side according to the subframe in the radio frame.
  • the network side device is configured to determine a subframe in the radio frame, and communicate with the terminal according to the subframe in the radio frame; and the terminal is configured to determine the subframe in the radio frame, according to the subframe in the radio frame and the network side device.
  • the radio frame includes a variable subframe, a downlink fixed subframe, and an uplink fixed subframe
  • the downlink fixed subframe is a subframe in which the transmission direction is the downlink direction and the transmission direction is fixed
  • the downlink in the special subframe In the pilot time slot, the uplink fixed subframe is a subframe in which the transmission direction is the uplink direction and the transmission direction is fixed
  • the variable subframe is a subframe with a variable transmission direction.
  • the uplink and downlink configurations of the subframe can be dynamically changed, thereby satisfying the service requirements in the cell, and improving system efficiency and system performance.
  • FIG. 1 is a schematic diagram of a frame structure of a TD-LTE system
  • FIG. 2 is a schematic structural diagram of a time division duplex communication system according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a network side device according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a method for performing time division duplex communication on a network side according to an embodiment of the present invention
  • FIG. 6 is a schematic flowchart of a method for performing time division duplex communication by a base station according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a subframe according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a subframe for scheduling according to an embodiment of the present invention. detailed description
  • the network side and the terminal communicate by using a subframe in a radio frame, where the radio frame includes a variable subframe, a downlink fixed subframe, and an uplink fixed subframe, and the downlink fixed subframe is a downlink direction and transmits.
  • the embodiments of the present invention can be applied to a TDD system (such as a TD-LTE system), and can also be applied to other systems that need to dynamically adjust uplink and downlink configurations of a subframe, such as a TD-SCDMA system and its subsequent evolution system, WiMAX ( Worldwide Interoperability for Microwave Access, Global Wave Interconnect, and its subsequent evolution systems.
  • a TDD system such as a TD-LTE system
  • WiMAX Worldwide Interoperability for Microwave Access, Global Wave Interconnect, and its subsequent evolution systems.
  • the time division duplex communication system of the embodiment of the present invention includes: a network side device 10 and a terminal 20.
  • the network side device 10 is configured to determine a subframe in the radio frame, and communicate with the terminal according to the subframe in the radio frame.
  • the terminal 20 is configured to determine a subframe in the radio frame, and communicate with the network side device 10 according to the subframe in the radio frame.
  • the radio frame here includes a variable subframe, a downlink fixed subframe, and an uplink fixed subframe
  • the downlink fixed subframe is a subframe in which the transmission direction is the downlink direction and the transmission direction is fixed
  • the downlink guide in the special subframe The frequency slot, the uplink fixed subframe is a subframe in which the transmission direction is the uplink direction and the transmission direction is fixed
  • the variable subframe further includes an uplink variable subframe and a downlink variable subframe
  • the uplink variable subframe is determined.
  • the downlink variable subframe is a variable subframe determined to be used for downlink transmission.
  • the uplink pilot time slot in the special subframe of the embodiment of the present invention has the same function as the uplink pilot time slot in the special subframe in the background art, and is not repeatedly described.
  • the downlink fixed subframe includes subframe 0 and subframe 5 in each radio frame; the uplink fixed subframe includes subframe 2 and subframe 7 in each radio frame; the special subframe includes each radio frame Subframe 1.
  • the other subframes are variable subframes.
  • the subframe 6 may be a special subframe.
  • the subframe 6 may also be a downlink fixed subframe.
  • the network side device 10 After determining the subframe in the radio frame, the network side device 10 sends the downlink reference symbol and/or the downlink control channel through the downlink subframe (the downlink reference symbol and/or the downlink control channel indicate three cases, and the first type only sends The downlink reference symbol, the second type only sends the downlink control channel, the third type sends the downlink reference symbol and sends the downlink control channel, and the subsequent occurrences and/or similar meanings herein have three meanings, which are not described in detail).
  • the function of the downlink reference symbol and/or the downlink control channel is to enable the terminal to perform blind detection, and the blind referenced downlink reference symbol or the subframe of the downlink control channel is a downlink subframe.
  • the downlink control channel herein includes but is not limited to one or more of the following signaling:
  • PCFICH PCFICH, PDCCH, and PHICH.
  • the terminal 20 performs blind detection on each subframe, and detects a downlink reference symbol and/or a subframe of the downlink control channel as a downlink subframe; if the downlink reference symbol and/or the downlink control channel are not detected, the terminal considers that The subframe is not a downlink subframe.
  • the network side device 10 can schedule the terminal to send the uplink channel by using the uplink fixed subframe and/or the uplink variable subframe (that is, the uplink channel is supported by the uplink fixed subframe and/or the uplink variable subframe, and the subsequent transmit channel and the meaning of the channel are Similarly, the description will not be repeated) and/or the uplink signal, and the number of PDSCHs transmitted through the downlink fixed subframe and/or the downlink variable subframe. According to and / or downlink control channel.
  • the terminal 20 receives the PDSCH data and/or the downlink control channel by using the downlink fixed subframe and/or the downlink variable subframe, and sends the uplink by using the uplink fixed subframe and/or the uplink variable subframe according to the scheduling of the network side.
  • Channel and / or uplink signals are examples of uplink signals.
  • the network side device 10 may schedule the terminal to send the uplink control channel only through the uplink fixed subframe, and the scheduling terminal only sends the uplink channel and/or the channel except the uplink control channel in the uplink channel by using the uplink variable subframe. / or signal. That is to say, the uplink channel other than the uplink control channel is transmitted through the uplink variable subframe, and/or the uplink signal is transmitted through the uplink variable subframe.
  • the uplink control channel sent by the uplink fixed subframe here includes but is not limited to:
  • HARQ Hybrid Automatic Repeat reQuest
  • CSI Channel
  • the uplink channel and/or the uplink signal are sent by the uplink variable subframe, including but not limited to:
  • the terminal 20 sends the uplink control channel only through the uplink fixed subframe according to the scheduling on the network side, and transmits the channel and/or the uplink channel except the uplink control channel only in the uplink variable subframe. signal.
  • the network side device 10 may add a subframe number in each uplink scheduling signaling, and may be used to schedule PUSCH data in a subframe corresponding to the subframe number, and by using a downlink fixed subframe and/or a downlink variable.
  • the frame sends downlink scheduling signaling, and is configured to schedule a downlink fixed subframe and/or a downlink variable subframe that carries the downlink scheduling signaling.
  • the network side device 10 may schedule PUSCH data in one or more subframes in one uplink scheduling signaling, and send uplink scheduling signaling through the downlink fixed subframe and/or the downlink variable subframe.
  • the downlink scheduling signaling sent by the network side device 10 is only used to schedule the downlink subframe that carries the downlink scheduling signaling.
  • the terminal 20 transmits data according to the scheduling of the network side device 10.
  • the terminal 20 blindly detects the uplink scheduling signaling for scheduling the subframe N on the network side, the subframe N is not monitored, and the data is directly sent through the subframe N, where N is a positive integer.
  • the subframe N here may be an uplink fixed subframe or an uplink variable subframe.
  • the network side device 10 determines an uplink variable subframe and a downlink variable subframe in the variable subframe, and determines and sends notification information according to the determined uplink variable subframe and the downlink variable subframe, and is used to notify the terminal.
  • the data is transmitted according to the notification information.
  • the terminal 20 receives the notification information from the network side, determines the subframe in the radio frame according to the notification information, and transmits the data.
  • the network side device 10 may send the notification information through a downlink control channel or a broadcast channel. For example, if the network side device 10 sends the notification information through the downlink control channel, the notification information may be placed in the physical layer control channel and sent through the downlink fixed subframe.
  • the network side device 10 may use one PDCCH to carry the notification information in the PDCCH common search space of the subframe 0 and the subframe 5; and may also pass the MIB (Master Information Block, The method of adding bit information in the information block) is carried on the PBCH (Physical Broadcast Channel) channel in the subframe 0.
  • PBCH Physical Broadcast Channel
  • the network side device 10 determines the notification information, and several are listed below.
  • the network side device 10 sets the value of the corresponding bit in the bitmap (bit bitmap) of the uplink subframe in a certain length of time, and sets the value of the corresponding bit in the bitmap of the downlink subframe in the time length, and Bitmap as a notification message.
  • the terminal 20 determines an uplink subframe and a downlink subframe within a certain length of time according to the value of each bit in the bitmap.
  • the bitmap may only indicate the transmission direction of the variable subframe in a certain length of time, that is, how many bits of the variable subframe are present, and then determine the corresponding bit in the bitmap according to the transmission direction of the variable subframe. Value.
  • the specific duration may be specified in the protocol, or the terminal 20 may be notified by the network side; the set duration may also be updated as needed.
  • bitmap is a total of 4 bits. If 1 represents an uplink subframe, 0 represents a downlink subframe; if subframes 4, 5, and 8 are uplink variable subframes, and subframe 7 is a downlink variable subframe, the bitmap is 1101.
  • the bitmap may also indicate the transmission direction of all the subframes in a certain length of time.
  • the special subframe may be specified to represent the downlink subframe, or the special subframe may be used to indicate the uplink subframe, and the corresponding subframe of the special subframe may be set as the invalid bit. Bit. Since the location terminal 20 of the special subframe knows in advance, the bit terminal corresponding to the special subframe may not be parsed. The value of the bit corresponding to the specific special subframe can be set as needed.
  • a bitmap may also only indicate the transmission direction of all subframes except a special subframe in a certain length of time.
  • the specific bitmap indicates which subframes, the subframes corresponding to each bit, and the meaning of each bit value can be specified in the protocol, and the terminal can also be notified by the network side.
  • the network side device 10 determines the sequence number corresponding to the configuration format of the uplink subframe and the downlink subframe in a certain length of time according to the correspondence between the configuration format and the sequence number, and uses the determined sequence number as the notification information. For example, the network side device 10 combines all the subframe directions for joint coding, and determines the corresponding sequence number.
  • the terminal 20 determines the configuration format corresponding to the serial number according to the correspondence between the configuration format and the serial number, according to The configuration format determines an uplink subframe and a downlink subframe within a certain length of time.
  • the correspondence between the configuration format and the serial number may be specified in the protocol in advance, or may be updated by the network side as needed, and notified to the terminal 20; the correspondence between the configuration format and the serial number may also be updated as needed.
  • the configuration format can only indicate the configuration of the uplink variable subframe and the downlink variable subframe in the variable subframe in a certain length of time; it can also indicate the configuration manner of all uplink subframes and all downlink subframes in a certain length of time.
  • the configuration format indicates the configuration of all the uplink subframes and all the downlink subframes in a certain period of time.
  • D represents a downlink subframe
  • S represents a special subframe
  • U represents an uplink subframe
  • the network side device 10 checks whether the configuration format of the current 10 ms is the same as the configuration format in the first embodiment, and then determines the corresponding serial number, and sends the serial number to the terminal 20; the terminal 20 checks the configuration mode corresponding to the received serial number according to Table 1, thereby It is known which subframes each subframe is specific.
  • Table 1 is only an example. It does not mean that the correspondence between the configuration format and the serial number must be the same as that in Table 1. The correspondence between the configuration format and the serial number cannot be exhaustive. The other correspondences between the configuration format and the serial number also apply to Embodiments of the invention.
  • the uplink channel and/or the uplink signal of the terminal 20 can also be received through the uplink fixed subframe and/or the uplink variable subframe, and the downlink fixed subframe and/or Or down
  • the variable subframe transmits the PDSCH data and/or the downlink control channel.
  • the terminal 20 transmits the uplink channel and/or the uplink signal by using the uplink fixed subframe and/or the uplink variable subframe (such as transmitting user data, HARQ feedback information, CSI feedback information, scheduling request information, random access channel (PRACH), SRS, etc.), and receiving PDSCH data and/or downlink control channel through downlink fixed subframes and/or downlink variable subframes.
  • the uplink fixed subframe and/or the uplink variable subframe such as transmitting user data, HARQ feedback information, CSI feedback information, scheduling request information, random access channel (PRACH), SRS, etc.
  • the network side device 10 can also send the downlink control channel only through the downlink fixed subframe, and receive the uplink control channel only through the uplink fixed subframe.
  • the terminal 20 receives the downlink control channel only through the downlink fixed subframe, and only fixes through the uplink.
  • the subframe transmits an uplink control channel (including HARQ feedback information, CSI feedback information, scheduling request, random access, etc.).
  • the terminal 20 performs blind detection only in the downlink fixed subframe. If the network side device 10 transmits through the downlink variable subframe, the terminal 20 performs blind only in the downlink variable subframe. If the network side device 10 transmits through the downlink fixed subframe and the downlink variable subframe, the terminal 20 performs blind detection on the downlink fixed subframe and the downlink variable subframe.
  • the network side device 10 can also receive the HARQ feedback information of the terminal only through the uplink fixed subframe.
  • the terminal 20 receives the HARQ feedback information of the terminal only through the uplink fixed subframe.
  • the subframe corresponding uplink scheduling may be added to each PDCCH signaling, and the network side device 10 may schedule PUSCH data in one or more subframes in one PDCCH signaling. And transmitting uplink scheduling signaling by using a downlink fixed subframe and/or a downlink variable subframe;
  • the network side device 10 may schedule PDSCH data in one or more subframes in one PDCCH signaling, and send uplink scheduling signaling through the downlink fixed subframe and/or the downlink variable subframe.
  • the downlink control channel is transmitted only in the downlink fixed subframe, and the PDSCH data is transmitted only in the downlink variable subframe.
  • the subframe number indication is added to the PDCCH, and is used to schedule PDSCH or PUSCH data in different subframes in one DL subframe.
  • the uplink control information PUCCH is transmitted only in the uplink fixed subframe.
  • Mode 3 The network side device 10 sets the value of the corresponding bit in the bitmap of the subframe in which the uplink control channel can be carried in the uplink subframe within a certain length of time, and uses the bitmap as the notification information.
  • the terminal 20 determines, according to the value of each bit in the bitmap, a subframe that can carry an uplink control channel in an uplink subframe within a certain length of time.
  • the bitmap may only represent the subframes in the variable subframes that can carry the uplink control channel in a certain length of time, that is, how many bits of the variable subframes are present, and then can carry the uplink according to the variable subframe.
  • the subframe of the control channel determines the bitmap.
  • the specific duration may be specified in the protocol, or the terminal 20 may be notified by the network side; the set duration may also be updated as needed.
  • a bitmap may also represent a subframe that can carry an uplink control channel in all subframes in a certain length of time. Since the location terminal 20 of the special subframe knows in advance, the bit terminal corresponding to the special subframe may not be parsed.
  • the bitmap may also represent only the subframes of the subframes that can carry the uplink control channel in all the subframes except the special subframe in a certain length of time.
  • the network side device 10 determines, according to the correspondence between the configuration format and the sequence number, the sequence number corresponding to the configuration format of the subframe capable of carrying the uplink control channel in the uplink subframe within a certain length of time, and uses the determined sequence number as the notification information. .
  • the terminal 20 determines the configuration format corresponding to the sequence number according to the correspondence between the configuration format and the sequence number, and determines the subframe that can carry the uplink control channel in the uplink subframe within a certain length of time according to the configuration format.
  • the subframe capable of carrying the uplink control channel includes an uplink fixed subframe and an uplink variable subframe.
  • the correspondence between the configuration format and the serial number may be specified in the protocol in advance, or may be updated by the network side as needed, and notified to the terminal 20; the correspondence between the configuration format and the serial number may also be updated as needed.
  • the configuration format can only represent the subframes that can carry the uplink control channel in all the subframes in a certain length of time; or the subframes that can carry the uplink control channel in all the uplink subframes in a certain length of time. Know which subframes are uplink subframes.
  • the style of the corresponding relationship between the configuration format and the serial number in the fourth method is similar to the corresponding configuration of the configuration format and the serial number in the second method, and details are not described herein again.
  • the uplink control channel of the terminal 20 can be received through the uplink fixed subframe and/or the subframe in which the uplink control channel can be carried in the uplink fixed subframe and/or the variable subframe.
  • the network side device 10 may add a subframe number in each uplink scheduling signaling, and may be used to schedule PUSCH data in a subframe corresponding to the subframe number, and to use a downlink fixed subframe and/or downlink.
  • the variable subframe sends downlink scheduling signaling, and is configured to schedule a downlink fixed subframe and/or a downlink variable subframe that carries the downlink scheduling signaling.
  • the network side device 10 may schedule the PUSCH data in one or more subframes in one uplink scheduling signaling, and send the uplink scheduling signaling in the downlink fixed subframe and/or the downlink variable subframe.
  • the downlink scheduling signaling sent by the network side device 10 is only used to schedule and carry the downlink scheduling signaling.
  • the downlink subframe The downlink subframe.
  • the terminal 20 transmits data according to the scheduling of the network side device 10.
  • the network side device 10 of the embodiment of the present invention can dynamically configure real-time service requirements and/or channel conditions.
  • the downlink service requirement can be obtained according to information such as the current downlink service buffer data volume and the service type of the base station.
  • the uplink service requirement can be obtained according to information such as the Buffer Status Report (BSR) and the service type reported by the user.
  • BSR Buffer Status Report
  • there are many downlink services in the current network You can configure more downlink sub-frames.
  • the current uplink services are more.
  • the current downlink channel load is more serious.
  • the current uplink channel load is more serious. , you can configure some uplink subframes.
  • the network side device in the embodiment of the present invention may be a base station (such as a macro base station, a micro base station, a home base station, etc.), or may be an RN (relay) device, or may be another network side device.
  • a base station such as a macro base station, a micro base station, a home base station, etc.
  • RN relay
  • the embodiment of the present invention further provides a network side device, a terminal, and a method for timely duplex communication. Since the principle of solving the problem of these devices is similar to that of the time division duplex communication system, the devices and methods are The implementation can be seen in the implementation of the system, and the repetition will not be repeated.
  • the network side device in the embodiment of the present invention includes: a first subframe determining module 100 and a first communications module 110.
  • the first subframe determining module 100 is configured to determine a subframe in the radio frame, where the radio frame includes a variable subframe, a downlink fixed subframe, and an uplink fixed subframe, where the downlink fixed subframe is a downlink direction and a transmission direction a fixed subframe and a downlink pilot slot in a special subframe, where the uplink fixed subframe is a subframe in which the transmission direction is the uplink direction and the transmission direction is fixed, and the variable subframe is a subframe with a variable transmission direction. ;
  • the first communication module 110 is configured to communicate with the terminal according to the subframe in the radio frame.
  • the first communication module 110 is further configured to send a downlink reference symbol and/or a downlink control channel by using a downlink subframe, where the downlink reference symbol and/or the downlink control channel are used for blind detection by the terminal, and the blind reference symbol is blindly detected. Or the subframe of the downlink control channel is used as the downlink subframe.
  • the first communication module 110 schedules the terminal to transmit the uplink channel and/or the uplink signal by using the uplink fixed subframe and/or the uplink variable subframe, and transmits the PDSCH data and/or the downlink by using the downlink fixed subframe and/or the downlink variable subframe.
  • a control channel wherein, the uplink variable subframe is a variable subframe determined to be used for uplink transmission, and the downlink variable subframe is a variable subframe determined to be used for downlink transmission.
  • the first communication module 110 schedules the terminal to transmit the uplink control channel only through the uplink fixed subframe, and the scheduling terminal transmits the channel and/or signal in the uplink channel and/or the uplink signal except the uplink control channel only through the uplink variable subframe.
  • the first communication module 110 adds a subframe number to each uplink scheduling signaling, and is configured to schedule PUSCH data in a subframe corresponding to the subframe number, and send a downlink scheduling by using a downlink fixed subframe and/or a downlink variable subframe.
  • the signaling is used to schedule a downlink fixed subframe and/or a downlink variable subframe that carries the downlink scheduling signaling.
  • the first communication module 110 sends uplink scheduling signaling by using a downlink fixed subframe and/or a downlink variable subframe.
  • the first subframe determining module 100 determines an uplink variable subframe and a downlink variable subframe in the variable subframe, where the uplink variable subframe is a variable subframe determined to be used for uplink transmission, and is downlink variable.
  • the subframe is a variable subframe determined to be used for downlink transmission;
  • the first communication module 110 determines and sends notification information according to the determined uplink variable subframe and the downlink variable subframe, and is used to notify the terminal to transmit data according to the notification information.
  • the first communication module 110 sets the value of the corresponding bit in the bitmap of the uplink subframe in a certain length of time, and sets the value of the corresponding bit in the bitmap of the downlink subframe in the time length, and uses the bitmap as the notification information; Or determining the sequence number corresponding to the configuration format of the uplink subframe and the downlink subframe in a certain length of time according to the correspondence between the configuration format and the sequence number, and using the determined sequence number as the notification information.
  • the uplink subframe is an uplink variable subframe
  • the downlink subframe is a downlink variable subframe
  • the first communication module 110 receives the uplink channel and/or the uplink signal of the terminal by using the uplink fixed subframe and/or the uplink variable subframe, and transmits the PDSCH data by using the downlink fixed subframe and/or the downlink variable subframe. Or downlink control channel.
  • the first communication module 110 can also transmit the downlink control channel only through the downlink fixed subframe, and receive the uplink control channel only through the uplink fixed subframe.
  • the first communication module 110 may also receive the HARQ feedback information of the terminal only through the uplink fixed subframe.
  • the first communication module 110 adds a subframe number in each PDCCH signaling, and is used to schedule PDSCH data or PUSCH data in a subframe corresponding to the subframe number.
  • the first communication module 110 sets the value of the corresponding bit in the bitmap of the subframe in which the uplink control channel can be carried in the uplink subframe within a certain length of time, and uses the bitmap as the notification information; or according to the configuration format and the serial number.
  • the first communication module 110 receives the uplink control channel of the terminal through the uplink fixed subframe and/or the variable subframe, and can receive the uplink control channel of the terminal through any uplink subframe.
  • the channel and/or the uplink signal, and the PDSCH data and/or the downlink control channel are transmitted through the downlink fixed subframe and/or the downlink variable subframe.
  • the first communication module 110 may further add a subframe number in each uplink scheduling signaling, and may be used to schedule PUSCH data in a subframe corresponding to the subframe number, and send the downlink fixed subframe and/or the downlink variable subframe.
  • the downlink scheduling signaling is used to schedule a downlink fixed subframe and/or a downlink variable subframe that carries the downlink scheduling signaling.
  • the first communication module 110 transmits uplink scheduling signaling by using a downlink fixed subframe and/or a downlink variable subframe.
  • the first communication module 110 sends the notification information through a downlink control channel or a broadcast channel.
  • the first communication module 110 places the notification information in the physical layer control channel, and uses the downlink fixed subframe. Send.
  • the terminal in the embodiment of the present invention includes: a second determining module 200 and a second communication module 210.
  • the second determining module 200 is configured to determine a subframe in the radio frame, where the radio frame includes a variable subframe, a downlink fixed subframe, and an uplink fixed subframe, where the downlink fixed subframe is in a downlink direction and the transmission direction is fixed.
  • the changed subframe, and the downlink pilot slot in the special subframe, the uplink fixed subframe is a subframe in which the transmission direction is the uplink direction and the transmission direction is fixed, and the variable subframe is a subframe with a variable transmission direction;
  • the second communication module 210 is configured to communicate with the network side according to the subframe in the radio frame.
  • the second determining module 200 is further configured to perform blind detection on each subframe, and use a subframe that detects the downlink reference symbol and/or the downlink control channel as a downlink subframe.
  • the second communication module 210 receives the PDSCH data and/or the downlink control channel by using the downlink fixed subframe and/or the downlink variable subframe, and sends the uplink by using the uplink fixed subframe and/or the uplink variable subframe according to the scheduling of the network side.
  • a channel and/or an uplink signal wherein, the uplink variable subframe is a variable subframe determined to be used for uplink transmission, and the downlink variable subframe is a variable subframe determined to be used for downlink transmission.
  • the second communication module 210 transmits the uplink control channel only through the uplink fixed subframe according to the scheduling of the network side, and transmits the channel and/or the uplink channel except the uplink control channel only through the uplink variable subframe. signal.
  • the second communication module 210 may not monitor the subframe N and directly send data through the subframe N; where N is a positive integer.
  • the second determining module 200 receives the notification information from the network side, and determines the subframe data in the radio frame according to the notification information.
  • the variable subframe includes the uplink variable subframe and the downlink variable subframe.
  • the frame is determined to be a variable subframe used for uplink transmission, and the downlink variable subframe is a variable subframe determined to be used for downlink transmission.
  • the second determining module 200 is further configured to: when the notification information is a bitmap, determine an uplink subframe and a downlink subframe according to a value of each bit in the bitmap; when the notification information is a sequence number, according to The mapping between the format and the sequence number is configured, and the configuration format corresponding to the sequence number is determined, and the uplink subframe and the downlink subframe within a certain length of time are determined according to the configuration format.
  • the second communication module 210 transmits the uplink channel and/or the uplink signal by using the uplink fixed subframe and/or the uplink variable subframe, and receives the PDSCH data and/or the downlink control channel by using the downlink fixed subframe and/or the downlink variable subframe. .
  • the second communication module 210 may receive the downlink control channel only through the downlink fixed subframe, and transmit the uplink control channel only through the uplink fixed subframe.
  • the second communication module 210 may also receive the HARQ feedback information of the terminal only through the uplink fixed subframe.
  • the second determining module 200 determines, according to the value of each bit in the bitmap, the subframe that can carry the uplink control channel in the uplink subframe within a certain length of time; According to the correspondence between the configuration format and the serial number, the configuration format corresponding to the serial number is determined, and the configuration format is determined according to the configuration format.
  • the second communication module may also send an uplink channel/uplink other than the uplink control channel by using any uplink subframe in an uplink fixed control subframe and/or an uplink control channel that is sent in a subframe capable of carrying the uplink control channel in the variable subframe.
  • the signal is sent, and the PDSCH data and/or the downlink control channel are received through the downlink fixed subframe and/or the downlink variable subframe.
  • the method for performing time division duplex communication on the network side of the embodiment of the present invention includes the following steps: Step 501: A network side determines a subframe in a radio frame, where the radio frame includes a variable subframe, a downlink fixed subframe, and The uplink fixed subframe is a downlink subframe in which the transmission direction is the downlink direction and the transmission direction is fixed, and the downlink pilot slot in the special subframe.
  • the uplink fixed subframe is the uplink direction and the transmission direction is fixed.
  • a constant subframe, a variable subframe is a subframe with a variable transmission direction.
  • Step 502 The network side communicates with the terminal according to the subframe in the radio frame.
  • variable subframe here further includes an uplink variable subframe, which is a variable subframe determined to be used for uplink transmission, and a downlink variable subframe, which is determined to be used as a downlink. Variable subframe for transmission.
  • the uplink pilot time slot in the special subframe of the embodiment of the present invention has the same function as the uplink pilot time slot in the special subframe in the background art, and is not repeatedly described.
  • the downlink fixed subframe includes subframe 0 and subframe 5 in each radio frame; the uplink fixed subframe includes subframe 2 and subframe 7 in each radio frame; the special subframe includes each radio frame Subframe 1.
  • the other subframes are variable subframes.
  • the subframe 6 may be a special subframe.
  • the subframe 6 may also be a downlink fixed subframe.
  • the network side After determining the subframe in the radio frame, the network side sends the downlink reference symbol and/or the downlink control channel through the downlink subframe.
  • the role of the downlink reference symbol and/or the downlink control channel is to enable the terminal to perform blind detection, and the blind referenced downlink reference symbol or the subframe of the downlink control channel is a downlink subframe.
  • the network side may schedule the terminal to send the uplink channel and/or the uplink signal by using the uplink fixed subframe and/or the uplink variable subframe, and send the PDSCH data and/or the downlink by using the downlink fixed subframe and/or the downlink variable subframe. Control channel.
  • the network side may schedule the terminal to send the uplink control channel only through the uplink fixed subframe, and the scheduling terminal only sends the uplink channel and/or the uplink signal except the uplink control channel through the uplink variable subframe. signal. That is to say, the uplink channel other than the uplink control channel is transmitted through the uplink variable subframe, and/or the uplink signal is transmitted through the uplink variable subframe.
  • the network side may add a subframe number to each uplink scheduling signaling, and may be configured to schedule PUSCH data in a subframe corresponding to the subframe number, and send downlink scheduling signaling by using the downlink fixed subframe and/or the downlink variable subframe. And configured to schedule a downlink fixed subframe and/or a downlink variable subframe that carries the downlink scheduling signaling.
  • the network side may schedule the PUSCH in one or more subframes in one uplink scheduling signaling.
  • the downlink scheduling signaling sent by the network side is only used to schedule the downlink subframe that carries the downlink scheduling signaling.
  • the network side determines an uplink variable subframe and a downlink variable subframe in the variable subframe, and determines and sends notification information according to the determined uplink variable subframe and the downlink variable subframe, and is used to notify the terminal according to the notification.
  • Information transfer data The network side determines an uplink variable subframe and a downlink variable subframe in the variable subframe, and determines and sends notification information according to the determined uplink variable subframe and the downlink variable subframe, and is used to notify the terminal according to the notification.
  • Information transfer data is used to notify the terminal according to the notification.
  • the network side may send the notification information through a downlink control channel or a broadcast channel.
  • the notification information may be placed in the physical layer control channel and sent through the downlink fixed subframe.
  • the network side may use one PDCCH to carry the notification information in the PDCCH common search space of the subframe 0 and the subframe 5; and may also add the bit information in the ⁇ by using the PDCCH in the PDCCH common search space.
  • Manner 1 The network side sets the value of the corresponding bit in the bitmap of the uplink subframe in a certain length of time, and the value of the corresponding bit in the bitmap of the downlink subframe in the set time length, and uses bitmap as the notification information.
  • the bitmap may only indicate the transmission direction of the variable subframe in a certain length of time, that is, how many bits of the variable subframe are present, and then determine the corresponding bit in the bitmap according to the transmission direction of the variable subframe. Value.
  • the specific duration may be specified in the protocol, or the terminal 20 may be notified by the network side; the set duration may also be updated as needed.
  • the bitmap may also indicate the transmission direction of all the subframes in a certain length of time.
  • the special subframe may be specified to represent the downlink subframe, or the special subframe may be used to indicate the uplink subframe, and the corresponding subframe of the special subframe may be set as the invalid bit. Bit. Since the location terminal of the special subframe knows in advance, the bit terminal corresponding to the special subframe can be resolved. The value of the bit corresponding to the specific special subframe can be set as needed.
  • a bitmap may also only indicate the transmission direction of all subframes except a special subframe in a certain length of time.
  • the specific bitmap indicates which subframes, the subframes corresponding to each bit, and the meaning of each bit value can be specified in the protocol, and the terminal can also be notified by the network side.
  • the network side determines the sequence number corresponding to the configuration format of the uplink subframe and the downlink subframe in a certain length of time according to the correspondence between the configuration format and the sequence number, and uses the determined sequence number as the notification information. For example, the network side combines all subframe directions for joint coding to determine the corresponding sequence number.
  • the mapping between the configuration format and the serial number may be specified in the protocol in advance, or may be performed by the network side as needed. Update, and notify the terminal; the correspondence between the configuration format and the serial number can also be updated as needed.
  • the configuration format may only indicate the configuration of the uplink variable subframe and the downlink variable subframe in the variable subframe in a certain length of time; and may also indicate the configuration manner of all uplink subframes and all downlink subframes in a certain length of time.
  • the uplink channel and/or the uplink signal of the terminal may be received through the uplink fixed subframe and/or the uplink variable subframe, and the downlink fixed subframe and/or the downlink may be used.
  • the sub-frame transmits PDSCH data and/or a downlink control channel.
  • the network side may also send the downlink control channel only through the downlink fixed subframe, and receive the uplink control channel only through the uplink fixed subframe.
  • the terminal performs blind detection only on the downlink fixed subframe. If the network side transmits through the downlink variable subframe, the terminal performs blind detection only in the downlink variable subframe. When the downlink fixed subframe and the downlink variable subframe are transmitted, the terminal performs blind detection on the downlink fixed subframe and the downlink variable subframe.
  • the network side may also receive the HARQ feedback information of the terminal only by using the uplink fixed subframe.
  • the terminal only receives the HARQ feedback information of the terminal by using the uplink fixed subframe.
  • the subframe number may be added to each PDCCH signaling, and the PDSCH data or the PUSCH data in the subframe corresponding to the subframe number is scheduled.
  • the network side may schedule PUSCH data in one or more subframes in one PDCCH signaling, and send uplink scheduling signaling in the downlink fixed subframe and/or the downlink variable subframe.
  • the network side may schedule PDSCH data in one or more subframes in one PDCCH signaling, and send uplink scheduling signaling through downlink fixed subframes and/or downlink variable subframes.
  • Manner 3 The network side sets the value of the corresponding bit in the bitmap of the subframe in which the uplink control channel can be carried in the uplink subframe within a certain length of time, and uses bitmap as the notification information.
  • the bitmap may only represent the subframes in the variable subframes that can carry the uplink control channel in a certain length of time, that is, how many bits of the variable subframes are present, and then can carry the uplink according to the variable subframe.
  • the subframe of the control channel determines the bitmap.
  • the specific duration may be specified in the protocol, or the terminal 20 may be notified by the network side; the set duration may also be updated as needed.
  • a bitmap may also represent a subframe that can carry an uplink control channel in all subframes in a certain length of time. Since the location terminal of the special subframe knows in advance, the bit terminal corresponding to the special subframe may not be parsed.
  • the bitmap may also represent only the subframes of the subframes that can carry the uplink control channel in all the subframes except the special subframe in a certain length of time.
  • the network side determines the sequence number corresponding to the configuration format of the subframe in which the uplink control channel can be carried in the uplink subframe within a certain length of time according to the correspondence between the configuration format and the sequence number, and uses the determined sequence number as the notification information.
  • the subframe capable of carrying the uplink control channel includes an uplink fixed subframe and an uplink variable subframe.
  • the mapping between the configuration format and the serial number may be specified in the protocol in advance, or may be updated by the network side as needed, and notified to the terminal; the correspondence between the configuration format and the serial number may also be updated as needed.
  • the configuration format may only represent the subframes that can carry the uplink control channel in all the uplink subframes and all the downlink subframes in a certain length of time; or the subframes that can carry the uplink control channel in all the uplink subframes in a certain length of time, This method requires the terminal to know which subframes are uplink subframes.
  • the style of the corresponding relationship between the configuration format and the serial number in the fourth method is similar to the corresponding configuration of the configuration format and the serial number in the second method, and details are not described herein again.
  • the uplink control channel of the terminal receiving terminal of the uplink control channel and the variable subframe can be used to receive the uplink control channel of the terminal through any uplink subframe.
  • the uplink channel/uplink signal except the uplink control channel, and the PDSCH data and/or the downlink control channel are transmitted through the downlink fixed subframe and/or the downlink variable subframe.
  • the network side may add a subframe number to each uplink scheduling signaling, and use the downlink subframe to adjust the PUSCH data in the subframe corresponding to the subframe number, and the downlink fixed subframe and/or downlink variable.
  • the subframe sends downlink scheduling signaling, and is configured to schedule a downlink fixed subframe and/or a downlink variable subframe that carries the downlink scheduling signaling.
  • the network side may schedule the PUSCH data in one or more subframes in one uplink scheduling signaling, and send the uplink scheduling signaling in the downlink fixed subframe and/or the downlink variable subframe.
  • the downlink scheduling signaling sent by the network side is only used to schedule the downlink subframe that carries the downlink scheduling signaling.
  • the network side of the embodiment of the present invention may be dynamically configured according to real-time service requirements and/or channel conditions.
  • the downlink service requirement can be obtained according to the information about the current downlink service buffer data volume and the service type of the base station, and the uplink service requirement can be obtained according to the buffer status information and service type reported by the user.
  • there are many downlink services in the current network You can configure more downlink sub-frames.
  • the current uplink services are more.
  • the current downlink channel load is more serious.
  • the current uplink channel load is more serious.
  • the method for performing time division duplex communication by a base station includes the following steps:
  • Step 601 The terminal determines a subframe in the radio frame, where the radio frame includes a variable subframe, a downlink fixed subframe, and an uplink fixed subframe, where the downlink fixed subframe is a downlink direction and a fixed transmission direction.
  • Step 602 The terminal communicates with the network side in the subframe in the radio frame.
  • the variable subframe here further includes an uplink variable subframe, which is a variable subframe determined to be used for uplink transmission, and a downlink variable subframe, which is determined to be used as a downlink. Variable subframe for transmission.
  • the terminal performs blind detection on each subframe, and detects a downlink reference symbol and/or a subframe of the downlink control channel as a downlink subframe. If the downlink reference symbol and/or the downlink control channel are not detected, the terminal considers the subframe. Not a downlink subframe.
  • the terminal may receive the PDSCH data and/or the downlink control channel by using the downlink fixed subframe and/or the downlink variable subframe, and send the uplink channel by using the uplink fixed subframe and/or the uplink variable subframe according to the scheduling of the network side. Or up signal.
  • the terminal may send the uplink control channel only through the uplink fixed subframe according to the scheduling on the network side, and transmit the channel and/or signal except the uplink control channel in the uplink channel and/or the uplink signal only through the uplink variable subframe.
  • the terminal transmits data according to scheduling on the network side.
  • the terminal blindly detects the uplink scheduling signaling for scheduling the subframe N on the network side, the subframe N is not monitored, and the data is directly sent through the subframe N, where N is a positive integer.
  • the subframe N here may be an uplink fixed subframe or an uplink variable subframe.
  • the terminal receives the notification information from the network side, determines the subframe in the radio frame according to the notification information, and transmits the data.
  • the notification information is a bitmap, and the value of the corresponding bit indicates whether the corresponding subframe is an uplink subframe or a downlink subframe.
  • the terminal determines an uplink subframe and a downlink subframe within a certain length of time according to the value of each bit in the bitmap.
  • the notification information is a sequence number, and the configuration format corresponding to the sequence number indicates an uplink and downlink configuration format.
  • the terminal determines the configuration format corresponding to the sequence number according to the mapping relationship between the configuration format and the sequence number, and determines the uplink subframe and the downlink subframe within a certain length of time according to the configuration format.
  • the terminal transmits an uplink channel and/or an uplink signal through an uplink fixed subframe and/or an uplink variable subframe, and receives PDSCH data and/or downlink through a downlink fixed subframe and/or a downlink variable subframe. Control channel.
  • the terminal may receive the downlink control channel only through the downlink fixed subframe, and send the uplink control channel (including HARQ feedback information, CSI feedback information, scheduling request, random access, etc.) only through the uplink fixed subframe.
  • the uplink control channel including HARQ feedback information, CSI feedback information, scheduling request, random access, etc.
  • the terminal performs blind detection only on the downlink fixed subframe. If the network side transmits through the downlink variable subframe, the terminal performs blind detection only in the downlink variable subframe. When the downlink fixed subframe and the downlink variable subframe are transmitted, the terminal performs blind detection on the downlink fixed subframe and the downlink variable subframe.
  • the terminal may receive the HARQ feedback information of the terminal only through the uplink fixed subframe.
  • the notification information is a bitmap, and the value of the corresponding bit indicates whether the corresponding subframe can carry the uplink control channel.
  • the terminal determines, according to the value of each bit in the bitmap, that the uplink subframe can bear in a certain length of time.
  • the subframe of the uplink control channel is
  • the notification information is a sequence number, and the configuration format corresponding to the sequence number indicates a subframe that can carry the uplink control channel.
  • the terminal determines the configuration format corresponding to the sequence number according to the mapping between the configuration format and the sequence number, and determines the subframe that can carry the uplink control channel in the uplink subframe within a certain length of time according to the configuration format.
  • the subframe capable of carrying the uplink control channel includes an uplink fixed subframe and an uplink variable subframe.
  • the terminal sends an uplink channel other than the uplink control channel through any uplink subframe by using an uplink control channel that is sent by the subframe in the uplink fixed subframe and/or the variable subframe that can carry the uplink control channel.
  • the terminal sends an uplink channel other than the uplink control channel through any uplink subframe by using an uplink control channel that is sent by the subframe in the uplink fixed subframe and/or the variable subframe that can carry the uplink control channel.
  • Uplink signal transmission, and receiving PDSCH data and/or downlink control channel through the downlink fixed subframe and/or the downlink variable subframe.
  • FIG. 5 and FIG. 6 can synthesize a process to form a new method of duplex communication, that is, after the network side and the terminal determine the subframes in the radio frame, they can communicate with each other.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • computer-usable storage interfaces including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • the uplink and downlink configurations of the subframe can be dynamically changed, thereby satisfying the service requirements in the cell, and improving system efficiency and system performance.

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

Abstract

La présente invention concerne le domaine technique de la communication sans fil, en particulier un procédé, un système et un dispositif de communication à duplexage par répartition dans le temps, servant à résoudre le problème, rencontré dans la technique antérieure, résidant dans l'impossibilité de répondre aux besoins d'un service dans une cellule en raison du fait que la répartition d'une sous-trame de liaison montante et d'une sous-trame de liaison ascendante reste fixe après avoir été confirmée. Le procédé selon l'invention comprend les étapes suivantes : un côté réseau confirme les sous-trames dans une trame sans fil qui comprend une sous-trame variable, une sous-trame constante de liaison descendante et une sous-trame constante de liaison ascendante, ladite sous-trame constante de liaison descendante étant une sous-trame présentant une direction de liaison descendante comme direction de transmission qui reste constante et qui est un créneau temporel pilote de liaison descendante dans une sous-trame spéciale, ladite sous-trame constante de liaison ascendante étant une sous-trame présentant une direction de liaison ascendante comme direction de transmission qui reste constante, et ladite sous-trame variable étant une sous-trame présentant une direction de transmission variable; et le côté réseau communique avec un terminal sur la base des sous-trames dans la trame sans-fil. La mise en oeuvre du procédé de la présente l'invention permet de répondre aux besoins du service dans la cellule, et d'améliorer l'efficacité et les performances du système.
PCT/CN2011/083009 2010-11-30 2011-11-28 Procédé, système et dispositif de communication à duplexage par répartition dans le temps WO2012072009A1 (fr)

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