WO2013020508A1 - Procédé, système et dispositif pour transmettre des données dans une trame sans fil duplex à répartition dans le temps (tdd) - Google Patents

Procédé, système et dispositif pour transmettre des données dans une trame sans fil duplex à répartition dans le temps (tdd) Download PDF

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Publication number
WO2013020508A1
WO2013020508A1 PCT/CN2012/079832 CN2012079832W WO2013020508A1 WO 2013020508 A1 WO2013020508 A1 WO 2013020508A1 CN 2012079832 W CN2012079832 W CN 2012079832W WO 2013020508 A1 WO2013020508 A1 WO 2013020508A1
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WIPO (PCT)
Prior art keywords
uplink
downlink subframe
tdd
downlink
subframe
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PCT/CN2012/079832
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English (en)
Chinese (zh)
Inventor
潘学明
沈祖康
孙韶辉
丁昱
肖国军
Original Assignee
电信科学技术研究院
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Publication of WO2013020508A1 publication Critical patent/WO2013020508A1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • a time division duplex (TDD) mode refers to that the uplink and downlink use the same working frequency band to transmit uplink and downlink signals at different time intervals.
  • GP guard interval
  • the FDD (Frequency Division Duplex) mode refers to the use of different working bands on the uplink and downlink. It can be performed on different frequency carriers at the same time.
  • the uplink and downlink signals are transmitted with a guard bandwidth (GB) between the uplink and the downlink.
  • 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 subframes: DwPTS (Downlink Pilot Time Slot) for transmitting PSS (Primary Synchronization Signal), PDCCH (Physical Downlink Control Channel), PHICH (Physical HARQ Indication Channel), PCFICH (Physical Control Format Indication Channel), PDSCH (Physical Downlink Shared Channel), etc.
  • the protection interval between the downlink and the uplink; UpPTS (Uplink Pilot Time Slot) is used to transmit SRS (Sounding Reference Signal) and PRACH (Physical Random Access Channel). Wait.
  • the regular subframe includes an uplink subframe and a downlink subframe, and is used for transmitting an uplink/downlink control channel and service data.
  • you can configure two special subframes in subframes 1 and 6) or a special subframe (in subframe 1).
  • 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.
  • D indicates that it is used for downlink transmission
  • U indicates that it is used for uplink transmission
  • S indicates that the subframe is a special sub-frame.
  • Frame including DwPTS, GP And UpPTS three parts.
  • Table 1 LTE TDD uplink and downlink subframe configuration format
  • UEs user equipments
  • SI System Information
  • the uplink and downlink subframe configuration of the TDD cell is sent to all users in the cell through system broadcast. Because the system broadcast configuration changes require more complicated processes such as paging and rereading system broadcast, the change period is longer (the fastest change time) The limit is 640ms), which cannot adapt to real-time changes in business needs.
  • the present invention provides a method, a system, and a device for transmitting data in a TDD radio frame, which are used to solve the problem that the uplink and downlink subframe configurations of the TDD cell that are existing in the prior art cannot adapt to changes in service requirements.
  • the method for transmitting data in a time-division duplex TDD radio frame includes: determining, by the network side, uplink and downlink subframe configuration information of an evolved TDD user equipment, and transmitting the user-specific high-level signaling to the evolved TDD The user equipment sends uplink and downlink subframe configuration information.
  • the network side transmits data through a TDD radio frame.
  • the evolved TDD user equipment determines the TDD uplink and downlink subframe configuration according to the uplink and downlink subframe configuration information from the network side received by the user-specific high layer signaling;
  • the evolved TDD user equipment transmits data through the TDD radio frame according to the determined uplink and downlink subframe configuration.
  • a network side device for transmitting data in a TDD radio frame which is provided by the embodiment of the present application, includes:
  • the configuration module is configured to determine uplink and downlink subframe configuration information of the evolved TDD user equipment, and is customized by the user.
  • the high layer signaling sends the uplink and downlink subframe configuration information to the evolved TDD user equipment;
  • the first data transmission module is configured to transmit data through the TDD radio frame.
  • An evolved TDD user equipment for transmitting data in a TDD radio frame includes: a determining module, configured to determine, according to uplink and downlink subframe configuration information from a network side received by a user-specific high layer signaling, TDD uplink and downlink subframe configuration;
  • a system for transmitting data in a TDD radio frame includes:
  • the network side device is configured to determine the uplink and downlink subframe configuration information of the evolved TDD user equipment, and send the uplink and downlink subframe configuration information to the evolved TDD user equipment by using the user-specific high layer signaling, and transmit the data by using the TDD radio frame;
  • the evolved TDD user equipment is configured to determine, according to the uplink and downlink subframe configuration information from the network side that is received by the user-specific high-layer signaling, the TDD uplink-downlink subframe configuration, and the TDD radio frame according to the determined uplink-downlink subframe configuration. transfer data.
  • FIG. 1 is a schematic diagram of a frame structure of a TD-LTE system
  • FIG. 2 is a schematic structural diagram of a system for transmitting data in a TDD radio frame according to an embodiment of the present application
  • FIG. 3 is a schematic structural diagram of a network side device for transmitting data in a TDD radio frame according to an embodiment of the present application
  • FIG. 4 is a schematic structural diagram of an evolved TDD user equipment in a TDD radio frame according to an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of a method for transmitting data in a network side TDD radio frame according to an embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart of a method for transmitting data in a TDD radio frame of a user equipment side according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of an application scenario of an embodiment of the present application
  • FIG. 8A is a schematic diagram of a first D2D according to an embodiment of the present application.
  • FIG. 8B is a schematic diagram of a second D2D according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of application in a HetNet cell according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of an application for enhancing uplink coverage according to an embodiment of the present application.
  • the network side of the embodiment of the present application sends uplink and downlink sub-subsidiaries to the evolved TDD user equipment through user-specific high-level signaling.
  • Frame configuration information The evolved TDD user equipment performs TDD radio frame transmission data according to the uplink and downlink subframe configuration information from the network side received through the user-specific high layer signaling.
  • the embodiment of the present application configures the TDD uplink and downlink subframes for the user equipment by using the high-layer signaling, thereby shortening the change period, and adapting to the change of the service requirement; and not requiring all user equipments in the cell to frequently re-read the system message, saving The power consumption of the user equipment.
  • the evolved TDD user equipment is a user equipment of LTE Rel (version) -11 and later.
  • the TDD uplink and downlink subframe configuration corresponding to the uplink and downlink subframe configuration information sent by the user-specific high-layer signaling may be one of the TDD uplink-downlink subframe configurations specified in Rel-8, Rel-9, and Rel-10 ( As shown in Table 1, other new uplink and downlink subframe configurations may also be used.
  • the system for transmitting data in a TDD radio frame in the embodiment of the present application includes: a network side device 10 and an evolved TDD user device 20.
  • the network side device 10 is configured to determine the uplink and downlink subframe configuration information of the evolved TDD user equipment 20, and send the uplink and downlink subframe configuration information to the evolved TDD user equipment 20 through the user-specific high layer signaling, and the TDD radio frame. transfer data;
  • the evolved TDD user equipment 20 is configured to determine, according to the uplink and downlink subframe configuration information from the network side device 10, which is received by the user-specific high-layer signaling, the TDD uplink-downlink subframe configuration, according to the determined uplink-downlink subframe configuration, TDD wireless frame transmission data.
  • the network side device 10 determines uplink and downlink subframe configuration information that needs to be sent to the evolved TDD user equipment according to at least one of the following information:
  • the downlink data is sent by the network side device to the user equipment, and the transmission buffer of the network side stores the data to be sent, thereby determining the traffic volume;
  • the amount of data is obtained based on the amount of transmit buffer data reported by the user equipment.
  • the service demand of the D2D serviced by the evolved TDD user equipment can be determined according to the user equipment report, network side allocation, and the like.
  • UE2 can allocate the configuration in Table 1 to UE2, and the configuration in Table 1 can be allocated to UE2. 1.
  • the uplink and downlink subframe configuration information that needs to be sent to the evolved TDD user equipment is determined according to the service demand of the evolved TDD user equipment, that is, the proportion of services required for the uplink and downlink.
  • UE2 performs the D2D downlink service demand, and can allocate the configuration 5 in Table 1 to UE2. If UE3 performs the D2D uplink and downlink service demand, the configuration 1 in Table 1 can be allocated to UE3.
  • the embodiment of the present application can solve the uplink coverage of the cell edge power limited user equipment. problem.
  • the downlink and uplink traffic ratio of the cell plan is 4:1. Therefore, the uplink and downlink subframes of the system broadcast are configured as 2 in Table 1 (that is, DSUDDDSUDD).
  • UL subframe bundling cannot be performed according to the subframe allocation mode. That is, an uplink coverage enhancement technology of TTI bundling is adopted by placing one data packet in consecutive uplink subframes.
  • the network-side device 10 can configure such a power-limited user equipment to use more uplink subframe configurations.
  • the eNB configures the uplink and downlink subframe configuration information for the subframe configured by the UE3 to be the configuration 1 in Table 1 (ie, DSUUDDSUUD), and the user equipment can perform the UL subframe bundling operation according to the prior art.
  • the implementation ensures that the coverage of the power-limited user equipment is not changed, and the corresponding relationship between the uplink and downlink configuration and the service ratio of the entire cell is not changed, thereby ensuring uplink and downlink subframe resources. Utilization.
  • the embodiments of the present application are not limited to the foregoing three modes, and other manners that can determine the uplink and downlink subframe configuration information that needs to be sent to the evolved TDD user equipment are applicable to the embodiments of the present application.
  • uplink and downlink subframe configuration information that needs to be sent to the evolved TDD user equipment is determined according to the service requirement, different uplink and downlink subframe configurations are used for different user equipments in the same cell to adapt to the service requirements of different user equipments.
  • the uplink and downlink subframe configuration information of the TDD user equipment is configured to allocate uplink subframes to the user equipment at the cell edge, so that the user equipment can use the UL subframe bundling method to transmit uplink data, improve uplink coverage, and avoid edge protection.
  • the coverage of a small number of user equipments affects the proportion of uplink and downlink service resources of the entire cell and improves resource utilization.
  • RRC Radio Resource Control
  • the network side device 10 can send up and down when the evolved TDD user equipment 20 establishes a connection with the network.
  • Line subframe configuration information Preferably, the network side device 10 can send up and down when the evolved TDD user equipment 20 establishes a connection with the network.
  • the network side device 10 may re-determine the uplink and downlink subframe configuration information of the evolved TDD user equipment 20, such as the uplink and downlink subframe configuration information, in a manner that may be changed by the network side device 10, or triggered by a high layer.
  • the change may be reconfigured through the user-specific high-level signaling, for example, the uplink and downlink subframe configuration information is sent through the high-level signaling reconfiguration process.
  • the network side device 10 sends the uplink and downlink subframe configuration information by using the system broadcast, and is configured to configure the TDD uplink and downlink subframes for the non-evolved TDD user equipment.
  • the non-evolved TDD user equipment is a user equipment of LTE Rel-10 and earlier versions.
  • the network side device 10 according to the non-evolved TDD user equipment and network communication data demand and/or the data demand of the evolved TDD user equipment (including the network communication service demand and/or the D2D service demand amount) Determine the uplink and downlink subframe configuration information that needs to be sent through the system broadcast.
  • the uplink and downlink subframe configuration information that needs to be sent by the system broadcast is determined according to the data requirement of the non-evolved TDD user equipment 20. If the downlink service demand of the non-evolved TDD user equipment is relatively large, the downlink subframe may be selected. If the uplink service demand of the non-evolved TDD user equipment is relatively large, you can select a configuration with more uplink subframes, such as configuration 0 in Table 1.
  • the uplink and downlink subframe configuration information that needs to be sent by the system broadcast is determined according to the data requirement of the evolved TDD user equipment 20. If the downlink service demand of the evolved TDD user equipment 20 is relatively large, the downlink subframe may be selected. If the uplink service demand of the evolved TDD user equipment 20 is relatively large, a configuration with more uplink subframes may be selected.
  • the network side policy can be referred to. Configured by non-evolved TDD user equipment or evolved TDD user equipment requirements.
  • the network side device 10 needs to transmit data or receive data in the same subframe.
  • the network side device 10 communicates with the user equipment according to the uplink and downlink subframe configuration information that has been sent to the user equipment, including the evolved TDD user equipment and the non-evolved TDD user equipment.
  • the subframes of the same transmission direction are allocated, and the network side device 10 uses the same transmission direction.
  • the network side device 10 uses the downlink for the transmission direction of the subframe A.
  • the network side device 10 determines, according to the service requirement of the user equipment, the subframes allocated to different user equipments for different transmission directions.
  • the transmission direction on the network side is based on the service demand of each user equipment. It is determined which user equipment needs to be preferentially served, and is transmitted in the subframe direction configured for the user equipment.
  • the subframe B is an uplink subframe for some user equipments, and is a downlink subframe for some user equipments, and the service requirement of the user equipment 1 is relatively large, and the user equipment 1 is preferentially served, and the subframe B is for the user equipment 1 If it is uplink, the network side device 10 also uses the uplink for the transmission direction of the subframe B.
  • subframes allocated to different transmission directions may also be based on whether there is HARQ (Hybrid) in the cell that is not fed back.
  • HARQ Hybrid
  • the Automatic Repeat reQuest process determines the transmission direction of the subframes allocated to different transmission directions for different user equipments for the network side.
  • the DL (downlink) HARQ transmission of one or more user equipments requires UL (downlink) ACK/NACK feedback
  • the UL HARQ transmission of multiple users requires DL ACK/NACK feedback, and determines that the corresponding one or more feedback subframes are downlink subframes.
  • the downlink data may be transmitted through the PDSCH (Physical Downlink Shared Channel), and the Physical Uplink Shared Channel (PUSCH) is adopted. ) Receive upstream data.
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • the evolved TDD user equipment 20 receives data through the downlink subframe in the TDD radio frame and transmits the data through the uplink subframe in the TDD radio frame when transmitting data through the TDD radio frame.
  • the evolved TDD user equipment 20 performs downlink control signaling PDCCH detection on the downlink subframe for which it is allocated; if the PDCCH is detected as downlink scheduling, it is downlinked in the downlink subframe of the downlink scheduling indication.
  • the MCS format indicated by the downlink scheduling indication on the frequency domain resource indicated by the link scheduling receives data; if the PDCCH is detected as an uplink scheduling, the frequency of the uplink scheduling indication in the uplink subframe indicated by the uplink scheduling indication
  • the MCS format indicated by the uplink scheduling indication on the domain resource transmits data.
  • the evolved TDD user equipment 20 performs blind detection of downlink control signaling on pre-assigned PRB resources. If the PDCCH is detected as a DL grant (downlink scheduling), the data is received in a specific MCS format on the specific frequency domain resource in the current downlink subframe and/or the subsequent one or more specific downlink subframes according to the indication of the PDCCH. (These are all determined by the PDCCH indication, the same below); if the PDCCH is detected as a UL grant (uplink scheduling), the specific frequency domain resource in the subsequent one or more specific uplink subframes according to the indication of the PDCCH Send data in a specific MCS format.
  • the evolved TDD user equipment 20 if the evolved TDD user equipment 20 communicates with the network, the evolved TDD user equipment 20 receives downlink data from the network side through the PDSCH, and transmits uplink data to the network side through the PUSCH.
  • the evolved TDD user equipment 20 If the evolved TDD user equipment 20 performs D2D, the evolved TDD user equipment 20 transmits data to other evolved TDD user equipments through uplink subframes and receives other evolved TDD user equipments through downlink subframes when performing D2D. data.
  • D2D can be performed under network side control.
  • the network side device 10 determines two evolutions. After the TDD user equipment needs to perform D2D, select a specific subframe, where a specific subframe is configured for an uplink subframe for a user equipment that needs to send data, and a downlink subframe for a user equipment that needs to receive data; 10 Scheduling an evolved TDD user equipment that needs to transmit data to transmit data on a particular subframe, and scheduling an evolved TDD user equipment that needs to receive data to receive data on a particular subframe.
  • UE1 and UE2 are allocated different uplink and downlink subframe configurations, and the network side device 10 knows that the two UEs need to perform D2D communication (for example, by means of interaction between the user equipment and the network side). Then, UE1 receives the UL grant sent by the network side device 10 in the subframe 4, and the UE grant indicates that it transmits data on the specific resource in the subframe 8 with a specific MCS (the data is the D2D data sent to the UE2). And the UE2 receives the DL grant sent by the network side device 10 in the subframe 8, and the UE grant indicates that it receives data on the same resource with the same MCS in the current subframe.
  • the above process implements D2D communication from UE1 to UE2, and the communication is completed under the control of the network side.
  • D2D may not be performed under the control of the network side, that is, the two user equipments performing D2D directly select D2D transmission on the subframe in which the transmission direction of the D2D user equipment is reversed.
  • the signal transmitted by UE1 on subframe 8 is received by UE2 on subframe 8.
  • the network side device 10 receives the feedback information of the corresponding data receiving HARQ process and the downlink subframe used for transmitting the feedback information on the uplink subframe for receiving the feedback information when transmitting the feedback information by using the TDD radio frame.
  • the evolved TDD user equipment 20 transmits the feedback information corresponding to the data receiving HARQ process and the downlink subframe used for receiving the feedback information on the uplink subframe for transmitting the feedback information when transmitting the feedback information through the TDD radio frame.
  • the feedback information of the corresponding data transmission HARQ process is received.
  • the information of the feedback information is as follows: 1.
  • the network side device 10 determines an uplink subframe for receiving feedback information according to the timing relationship between the PDSCH HARQ transmission and the uplink feedback information in the specific uplink and downlink subframe configuration specified in the Rel-8 TDD; Determining a downlink subframe for transmitting feedback information according to a timing relationship between the PUSCH HARQ transmission and the downlink feedback information in the specific uplink and downlink subframe configuration specified in the Rel-8 TDD; wherein, the specific uplink and downlink subframe configuration is adopted The uplink and downlink subframe configuration corresponding to the uplink and downlink subframe configuration information sent by the user-specific high-layer signaling.
  • the evolved TDD user equipment 20 determines an uplink subframe for transmitting feedback information according to a timing relationship between the PDSCH HARQ transmission and the uplink feedback information in the specific uplink and downlink subframe configuration specified in the Rel-8 TDD; Determining a downlink subframe for receiving feedback information according to a timing relationship between the PUSCH HARQ transmission and the downlink feedback information in the specific uplink and downlink subframe configuration specified in the Rel-8 TDD; wherein, the specific uplink and downlink subframe configuration is an evolution The uplink and downlink subframe configuration corresponding to the uplink and downlink subframe configuration information received by the TDD user equipment through the user-specific high-layer signaling.
  • the network side device 10 is configured according to the specific uplink and downlink subframe configuration specified in the Rel-8 TDD.
  • An uplink subframe for receiving feedback information is determined by a timing relationship between the PDSCH HARQ transmission and the uplink feedback information.
  • the uplink subframe used for receiving the feedback information is an uplink and downlink subframe sent by the network side through user-specific high-layer signaling.
  • the specific uplink and downlink subframe configuration is an uplink and downlink subframe configuration corresponding to the uplink and downlink subframe configuration information that is sent by the user-specific high-layer signaling.
  • the evolved TDD user equipment 20 is configured according to the specific uplink and downlink subframe configuration specified in the Rel-8 TDD.
  • An uplink subframe for transmitting feedback information is determined by a timing relationship between the PDSCH HARQ transmission and the uplink feedback information.
  • the uplink subframe used for transmitting the feedback information is received by the evolved TDD user equipment through user-specific high-layer signaling.
  • the timing relationship between the PUSCH HARQ transmission and the downlink feedback information in the subframe configuration determines a downlink subframe for receiving feedback information; wherein, the downlink subframe used for receiving the feedback information is an evolved TDD user equipment through a user-specific upper layer
  • the subframes in the intersection of the downlink subframe set determined by the uplink and downlink subframe configuration information received by the signaling and the downlink subframe set determined by the uplink and downlink subframe configuration information received by the system broadcast are not in the downlink of the intersection.
  • the frame does not receive feedback information.
  • the specific uplink and downlink subframe configuration is an uplink-downlink subframe configuration corresponding to the uplink and downlink subframe configuration information received by the evolved TDD user equipment through the user-
  • the information of the feedback information is as follows:
  • the network side device 10 uses the subframe in the specific uplink subframe set as the uplink subframe for receiving the feedback information.
  • the specific uplink subframe set is the uplink in any uplink and downlink subframe configuration. a subframe, such as subframe 2 and/or subframe 7; and a subframe in a specific downlink subframe set as a downlink subframe for transmitting feedback information; wherein the specific downlink subframe set is any uplink and downlink subframe
  • the transmission direction in the configuration is a downlink subframe, such as at least one of subframes 0, 1, 5, and 6.
  • the evolved TDD user equipment 20 uses the subframe in the specific uplink subframe set as the uplink subframe for transmitting the feedback information.
  • the specific uplink subframe set is the uplink in any uplink and downlink subframe configuration. a subframe, such as subframe 2 and/or subframe 7; and a subframe in a specific downlink subframe set as a downlink subframe for receiving feedback information; wherein the specific downlink subframe set is any uplink and downlink subframe
  • the transmission direction in the configuration is a downlink subframe, such as at least one of subframes 0, 1, 5, and 6.
  • the uplink and downlink subframe configuration information that needs to be sent to the evolved TDD user equipment is determined according to the real-time traffic status that needs to be transmitted by the evolved TDD user equipment. If the service demand of an evolved TDD user equipment 1 is large for a certain period of time (for example, one radio frame 10 ms), the upper and lower portions of the TDD user equipment allocated to the evolved The sub-frame allocation mode performs the data transceiving operation and the corresponding HARQ feedback operation (however there is no UE with a large traffic demand, the network side can select the subframe allocation mode of a certain UE to work); the data of other evolved TDD user equipments The transmission may be performed on a subframe that is assigned a common direction with the evolved TDD user equipment 1.
  • the data transmission and reception operation and the corresponding HARQ feedback operation are performed according to the subframe allocation mode (ie, DSUDDDDDD) allocated to UE2, and UE3 can still be in the sub-time.
  • the subframe allocation mode ie, DSUDDDDDD
  • Receive control signaling and data on frames 0, 1, 4, 5, 6, 9 and ACK/NACK feedback corresponding to the data transmitted in subframe 2 and the downlink HARQ process (; corresponding to feedback information mode 3);
  • the data is transmitted on the frame 2, and the ACK/NACK feedback corresponding to the downlink HARQ process is sent on the subframes 2, 3, 7, and 8 (corresponding to the feedback information modes one and two, and the ACK sent on the subframes 3, 7, and 8 at this time) /NACK feedback network side can not receive).
  • the network side device can ensure the normal reception of the UL ACK/NACK feedback according to the following manners: 1) the network side device uses the scheduling restriction, and only the DL related to the feedback subframe 2 is scheduled for the UE3 at this time. The HARQ process; 2) The network side device informs the UE3 that all DL HARQ feedbacks are transmitted on the subframe 2 at this time; 3) The network side device informs the UE3 through configuration that the DL HARQ corresponding to the same configuration as the UE2 (DSUDDDDDDD) Feedback timing and methods for feedback transmission.
  • DSUDDDDDDD DSUDDDDDDD
  • the solution of the embodiment of the present application can also be applied to a HetNet (heterogenous network) cell with a Single Cell ID (One Cell Identity) deployment.
  • a HetNet heterogenous network
  • Indoor RRH (Remote Radio Head) cell use the same Cell ID as the Macro, and connect to the Macro via a wired backhaul.
  • each RRH does not send its own system broadcast. Therefore, the UE can only read the uplink and downlink configuration information of the system from the broadcast information of the Macro cell.
  • the service characteristics of the RRH cell may be different, and the service characteristics of different RRH cells may be different.
  • the UE located in a certain RRH cell can learn that it communicates with the corresponding RRH through dedicated high-level signaling.
  • Up and down subframe configuration As shown in Figure 9, LUE1 in RRH1 mainly performs uplink service transmission. Therefore, RRH1 and LUE1 perform data transmission and reception according to DSUUUDSUUU mode.
  • LUE2 in RRH2 mainly performs downlink service transmission. Therefore, RRH2 and LUE2 perform data transmission and reception according to DSUDDDDDDD mode.
  • the precondition for such application is that there is better signal isolation between each RRH cell or between the RRH and the Macro cell, and the DL-UL cross-slot interference between transmission points can be shielded.
  • the different RRHs may use different uplink and downlink subframe configuration modes to provide the UE with different uplink and downlink subframe configurations. Services to accommodate business needs in different hotspots.
  • the network side device in the embodiment of the present application may be a station (such as a macro base station, a home base station, etc.), an RN (relay) device, or other network side devices.
  • a station such as a macro base station, a home base station, etc.
  • RN relay
  • the embodiment of the present application further provides a network side device, a user equipment, a method for transmitting data in a TDD radio frame on a network side, and a method for transmitting data in a TDD radio frame on a user equipment side, because these devices and
  • the method for solving the problem is similar to the system for transmitting data in a TDD radio frame. Therefore, the implementation of these devices and methods can be referred to the implementation of the system, and the repetition will not be repeated.
  • the network side device for transmitting data in the TDD radio frame in the embodiment of the present application includes: a configuration module 300 and a first data transmission module 310.
  • the configuration module 300 is configured to determine uplink and downlink subframe configuration information of the evolved TDD user equipment, and send the uplink and downlink subframe configuration information to the evolved TDD user equipment by using the user-specific high-level signaling;
  • the first data transmission module 310 is configured to transmit data through the TDD radio frame.
  • the configuration module 300 performs at least one of the actual service demand of the evolved TDD user equipment and the network, the D2D service requirement of the evolved TDD user equipment, and whether the uplink coverage of the evolved TDD user equipment needs to be enhanced. And determining uplink and downlink subframe configuration information that needs to be sent to the evolved TDD user equipment.
  • the configuration module 300 sends the uplink and downlink subframe configuration information when the evolved TDD user equipment establishes a connection with the network, or sends the uplink and downlink subframe configuration information by using a high layer signaling reconfiguration process.
  • the configuration module 300 sends the uplink and downlink subframe configuration information by using the system broadcast, and is configured to configure the TDD uplink and downlink subframes for the non-evolved TDD user equipment.
  • the configuration module 300 determines uplink and downlink subframe configuration information that needs to be sent by the system broadcast according to the data requirement of the non-evolved TDD user equipment and/or the data requirement of the evolved TDD user equipment.
  • the first data transmission module 310 transmits data or receives data on the same subframe.
  • the first data transmission module 310 communicates with the user equipment according to the uplink and downlink subframe configuration information that has been sent to the user equipment.
  • the first data transmission module 310 determines, according to the service demand of the user equipment, a transmission direction of the subframe allocated to different transmission directions for different user equipments for the network side.
  • the first data transmission module 310 determines, according to whether there is a HARQ process in the cell that does not perform feedback, a transmission direction of the subframe allocated to different user equipments for different transmission directions for the network side.
  • the first data transmission module 310 transmits downlink data through the PDSCH and receives uplink data through the PUSCH.
  • the first data transmission module 310 selects a specific subframe after determining that the two evolved TDD user equipments need to perform D2D, where the specific subframe is configured for the user equipment that needs to send data, and is required for the uplink subframe.
  • the user equipment receiving the data is configured with a downlink subframe; the user equipment that needs to send data is scheduled to send data on a specific subframe, and the user equipment that needs to receive data is scheduled to receive data on a specific subframe.
  • the first data transmission module 310 receives corresponding data reception on an uplink subframe for receiving feedback information.
  • the feedback information of the HARQ process and the feedback information of the corresponding data transmission HARQ process are sent on the downlink subframe for transmitting the feedback information.
  • the first data transmission module 310 is configured according to a specific uplink and downlink subframe configuration specified in the Rel-8 TDD.
  • the specific uplink and downlink subframe configuration is an uplink and downlink subframe configuration corresponding to the uplink and downlink subframe configuration information that is sent by the user-specific high-layer signaling.
  • the first data transmission module 310 determines an uplink subframe for receiving feedback information according to a timing relationship between the PDSCH HARQ transmission and the uplink feedback information in the specific uplink and downlink subframe configuration specified in the Rel-8 TDD;
  • the uplink subframe for receiving the feedback information is an uplink subframe set determined by the network side through the uplink and downlink subframe configuration information sent by the user-specific high-layer signaling, and the uplink subframe determined by the uplink-downlink subframe configuration information sent by the system broadcast.
  • a subframe in the intersection of the frame set determining a downlink subframe for transmitting feedback information according to a timing relationship between the PUSCH HARQ transmission and the downlink feedback information in the specific uplink and downlink subframe configuration specified in the Rel-8 TDD; And determining, by the network side, the downlink subframe set determined by the uplink and downlink subframe configuration information sent by the user-specific high-layer signaling, and the downlink subframe determined by the uplink and downlink subframe configuration information sent by the system broadcast.
  • the sub-frame of the intersection of the frame sets are examples of the intersection of the frame sets.
  • the first data transmission module 310 uses the subframe in the specific uplink subframe set as the uplink subframe for receiving the feedback information; wherein the specific uplink subframe set is the transmission direction in any uplink and downlink subframe configuration.
  • the subframe in the specific downlink subframe set is used as the downlink subframe for transmitting the feedback information.
  • the specific downlink subframe set is the subframe in which the transmission direction is downlink in any uplink and downlink subframe configuration.
  • an evolved TDD user equipment for transmitting data in a TDD radio frame includes: a determining module 400 and a second data transmitting module 410.
  • the determining module 400 is configured to determine the TDD uplink and downlink subframe configuration according to the uplink and downlink subframe configuration information from the network side received by the user-specific high layer signaling;
  • the second data transmission module 410 is configured to transmit data through the TDD radio frame according to the determined uplink and downlink subframe configuration. Preferably, the second data transmission module 410 receives data through downlink subframes in the TDD radio frame and transmits data through uplink subframes in the TDD radio frame.
  • the second data transmission module 410 performs PDCCH detection on the downlink subframe; if the PDCCH is detected as the downlink scheduling, the frequency domain resource indicated by the downlink scheduling indication in the downlink subframe of the downlink scheduling indication Receiving data in the MCS format indicated by the downlink scheduling indication; if the PDCCH is detected as the uplink scheduling, the uplink scheduling on the frequency domain resource indicated by the uplink scheduling indication in the uplink subframe indicated by the uplink scheduling indication
  • the indicated MCS format sends data;
  • the second data transmission module 410 transmits data to other evolved TDD user equipments through uplink subframes and data from other evolved TDD user equipments through downlink subframes when D2D is performed.
  • the second data transmission module 410 sends corresponding data reception on an uplink subframe for transmitting feedback information.
  • the second data transmission module 410 determines an uplink subframe for transmitting feedback information according to the timing relationship between the PDSCH HARQ transmission and the uplink feedback information in the specific uplink and downlink subframe configuration specified in the Rel-8 TDD; Determining a downlink subframe for receiving feedback information according to a timing relationship between the PUSCH HARQ transmission and the downlink feedback information in the specific uplink and downlink subframe configuration specified in the Rel-8 TDD; wherein, the specific uplink and downlink subframe configuration is an evolution The uplink and downlink subframe configuration corresponding to the uplink and downlink subframe configuration information received by the TDD user equipment through the user-specific high-layer signaling.
  • the second data transmission module 410 determines an uplink subframe for transmitting feedback information according to the timing relationship between the PDSCH HARQ transmission and the uplink feedback information in the specific uplink and downlink subframe configuration specified in the Rel-8 TDD;
  • the uplink subframe used for transmitting the feedback information is an uplink subframe set determined by the uplink and downlink subframe configuration information received by the evolved TDD user equipment through the user-specific high-layer signaling, and the uplink-downlink subframe configuration received through the system broadcast.
  • the downlink subframe used for receiving the feedback information is a downlink subframe set determined by the uplink and downlink subframe configuration information received by the evolved TDD user equipment through the user-specific high-layer signaling, and the upper and lower subframes received through the system broadcast.
  • the second data transmission module 410 uses the subframe in the specific uplink subframe set as the uplink subframe for transmitting the feedback information; wherein the specific uplink subframe set is the transmission direction in any uplink and downlink subframe configuration.
  • the subframe in the specific downlink subframe set is used as the downlink subframe for receiving the feedback information.
  • the specific downlink subframe set is the subframe in which the transmission direction is downlink in any uplink and downlink subframe configuration.
  • the method for transmitting data in a TDD radio frame in a network side of the embodiment of the present application includes the following steps: Step 501: The network side determines uplink and downlink subframe configuration information of an evolved TDD user equipment, and uses a user-specific high-level letter. Sending uplink and downlink subframe configuration information to the evolved TDD user equipment;
  • Step 502 The network side transmits data by using a TDD radio frame.
  • the network side determines uplink and downlink subframe configuration information that needs to be sent to the evolved TDD user equipment according to at least one of the following information:
  • the embodiments of the present application are not limited to the foregoing three modes, and other manners that can determine the uplink and downlink subframe configuration information that needs to be sent to the evolved TDD user equipment are applicable to the embodiments of the present application.
  • the uplink and downlink subframe configuration information that needs to be sent to the evolved TDD user equipment is determined according to the service requirement, the services of different user equipments are adapted to different user equipments in the same cell by using different uplink and downlink subframe configurations. Demand.
  • the uplink subframe configuration information that needs to be sent to the evolved TDD user equipment is determined according to whether the uplink coverage of the evolved TDD user equipment needs to be enhanced, the uplink subframe configuration is allocated to the user equipment at the cell edge.
  • the user equipment can transmit the uplink data in the UL subframe bundling mode to improve the uplink coverage. This prevents the coverage of a small number of user equipments from affecting the proportion of uplink and downlink service resources of the entire cell and improves resource utilization.
  • the network side may send the uplink and downlink subframe configuration information when the evolved TDD user equipment establishes a connection with the network.
  • the network side may re-determine the uplink and downlink subframe configuration information of the evolved TDD user equipment in a periodic manner or by a high-level triggering manner, and if the configuration information of the uplink and downlink subframes changes, The configuration of the uplink and downlink subframes is sent through the high-level signaling reconfiguration process.
  • non-evolved TDD user equipments In addition to the evolved TDD user equipment, there are also non-evolved TDD user equipments in the system. These non-evolved TDD user equipments need to configure uplink and downlink subframes through system broadcast. Specifically, the network side sends the uplink and downlink subframe configuration information through the system broadcast, and is configured to configure the TDD uplink and downlink subframes for the non-evolved TDD user equipment.
  • the non-evolved TDD user equipment is a user equipment of LTE Rel-10 and earlier versions.
  • the network side determines, according to the non-evolved TDD user equipment and network communication data demand and/or the data demand of the evolved TDD user equipment, including the network communication service demand and/or the D2D service demand.
  • the uplink and downlink subframe configuration information that needs to be sent through the system broadcast.
  • the network side needs to send data or receive data in the same subframe.
  • the network side communicates with the user equipment according to the uplink and downlink subframe configuration information that has been delivered to the user equipment (including the evolved TDD user equipment and the non-evolved TDD user equipment).
  • the network side uses the same transmission direction. For example, if the subframe A is a downlink subframe on different user equipments, the downlink side is also used for the transmission direction of the subframe A.
  • the subframes allocated to different transmission directions are determined by the network side according to the service demand of the user equipment, and the subframes allocated to different user equipments for different transmission directions are determined for the network side.
  • the direction of transmission Specifically, the network side determines, according to the service demand of each user equipment, which user equipment needs to be preferentially served, and transmits the subframe direction configured with the user equipment.
  • subframes allocated to different transmission directions may also be based on whether there is any feedback in the cell.
  • the HARQ process determines the transmission direction of the subframe allocated to different user equipments for different transmission directions for the network side. For example, if the DL HARQ transmission of one or more user equipments requires UL ACK/NACK feedback, it is determined that the corresponding one or more feedback subframes are uplink subframes; conversely, if one or more users have UL HARQ transmissions, DL is required.
  • the ACK/NACK feedback determines that the corresponding one or more feedback subframes are downlink subframes.
  • step 502 when the network side device transmits data through the TDD radio frame, the downlink data can be sent through the PDSCH and the uplink data can be received through the PUSCH.
  • the evolved TDD user equipment receives data through the downlink subframe in the TDD radio frame and transmits the data through the uplink subframe in the TDD radio frame when transmitting data through the TDD radio frame.
  • the evolved TDD user equipment performs downlink control signaling PDCCH detection on the downlink subframe for which it is allocated; if the PDCCH is detected as downlink scheduling, the downlink downlink in the downlink subframe indicated by the downlink scheduling indication If the PDCCH is an uplink scheduling, the frequency domain of the uplink scheduling indication in the uplink subframe indicated by the uplink scheduling indication is received on the frequency domain resource indicated by the road scheduling indication; The data is transmitted on the resource in the MCS format indicated by the uplink scheduling.
  • D2D can be performed under network side control. Specifically, after determining that the two evolved TDD user equipments need to perform D2D, the network side selects a specific subframe, where the specific subframe is configured for the user equipment that needs to send data, and is used for the user equipment that needs to receive data.
  • the downlink subframe is configured; the network side schedules the evolved TDD user equipment that needs to send data to send data on a specific subframe, and the evolved TDD user equipment that needs to receive data receives data in a specific subframe.
  • the network side receives the feedback information corresponding to the data receiving HARQ process on the uplink subframe for receiving the feedback information, and sends the corresponding information on the downlink subframe for transmitting the feedback information when transmitting the feedback information through the TDD radio frame.
  • the data sends feedback information of the HARQ process.
  • the feedback information is as follows: 1.
  • the network side determines the uplink subframe for receiving the feedback information according to the timing relationship between the PDSCH HARQ transmission and the uplink feedback information in the specific uplink and downlink subframe configuration specified in the Rel-8 TDD;
  • the timing relationship between the PUSCH HARQ transmission and the downlink feedback information in the specific uplink and downlink subframe configuration specified in the TDD is determined, and the downlink subframe for transmitting the feedback information is determined; wherein the specific uplink and downlink subframe configuration is exclusive to the user.
  • the uplink and downlink subframe configuration corresponding to the uplink and downlink subframe configuration information sent by the high layer signaling.
  • the network side determines the uplink subframe for receiving the feedback information according to the timing relationship between the PDSCH HARQ transmission and the uplink feedback information in the specific uplink and downlink subframe configuration specified in the Rel-8 TDD;
  • the uplink subframe that receives the feedback information is an uplink subframe set determined by the uplink and downlink subframe configuration information that is sent by the user-specific high-layer signaling on the network side, and an uplink subframe set that is determined by the uplink-downlink subframe configuration information that is sent by the system broadcast.
  • the downlink subframe in which the feedback information is sent is the downlink subframe set determined by the uplink and downlink subframe configuration information sent by the user-side dedicated high-layer signaling, and the downlink subframe set determined by the uplink-downlink subframe configuration information sent by the system broadcast.
  • the specific uplink and downlink subframe configuration is an uplink and downlink subframe configuration corresponding to the uplink and downlink subframe configuration information that is sent by the user-specific high-layer signaling.
  • the network side uses the subframe in the specific uplink subframe set as the uplink subframe for receiving the feedback information.
  • the specific uplink subframe set is the uplink in the uplink and downlink subframe configurations. a frame, such as subframe 2 and/or subframe 7; and a subframe in a specific downlink subframe set as a downlink subframe for transmitting feedback information; wherein, the specific downlink subframe set is in any uplink and downlink subframe configuration
  • the transmission direction is a downlink subframe, such as at least one of subframes 0, 1, 5, and 6.
  • the method for transmitting data in a TDD radio frame of a user equipment side of the embodiment of the present application includes the following steps: Step 601: The evolved TDD user equipment receives uplink and downlink sub-networks from the network side according to the high-level signaling that is exclusive to the user. Frame configuration information, determining a TDD uplink and downlink subframe configuration;
  • Step 602 The evolved TDD user equipment transmits data by using a TDD radio frame according to the determined uplink and downlink subframe configuration.
  • the evolved TDD user equipment in step 602 receives data through the downlink subframe in the TDD radio frame and transmits the data in the uplink subframe in the TDD radio frame when transmitting data through the TDD radio frame.
  • the evolved TDD user equipment performs downlink control signaling PDCCH detection on the downlink subframe for which it is allocated; if the PDCCH is detected as downlink scheduling, the downlink subframe in the downlink subframe according to the downlink scheduling indication If the PDCCH is an uplink scheduling, the frequency domain of the uplink scheduling indication in the uplink subframe according to the uplink scheduling indication is received on the frequency domain resource indicated by the uplink scheduling indicator; The data is transmitted on the resource in the MCS format indicated by the uplink scheduling.
  • the evolved TDD user equipment if the evolved TDD user equipment communicates with the network, the evolved TDD user equipment receives downlink data from the network side through the PDSCH, and sends uplink data to the network side through the PUSCH.
  • the evolved TDD user equipment If the evolved TDD user equipment performs D2D, the evolved TDD user equipment transmits data to other evolved TDD user equipments through uplink subframes and data from other evolved TDD user equipments through downlink subframes when performing D2D.
  • D2D may not be performed under the control of the network side, that is, the two user equipments performing D2D directly select D2D transmission on the subframe in which the transmission direction of the D2D user equipment is reversed.
  • the evolved TDD user equipment transmits the feedback information corresponding to the data receiving HARQ process and the downlink subframe used for receiving the feedback information on the uplink subframe for transmitting the feedback information when transmitting the feedback information through the TDD radio frame.
  • the feedback information of the corresponding data transmission HARQ process is received.
  • the evolved TDD user equipment is configured according to the specific uplink and downlink subframes specified in the Rel-8 TDD. Setting a timing relationship between the PDSCH HARQ transmission and the uplink feedback information, determining an uplink subframe for transmitting feedback information; and performing PUSCH HARQ transmission and downlink according to a specific uplink and downlink subframe configuration specified in the Rel-8 TDD The timing relationship of the feedback information is determined, and the downlink subframe for receiving the feedback information is determined.
  • the specific uplink and downlink subframe configuration is the upper and lower subframe configuration information corresponding to the uplink and downlink subframe information received by the evolved TDD user equipment through the user-specific high-layer signaling. Line subframe configuration.
  • the evolved TDD user equipment determines an uplink subframe for transmitting feedback information according to the timing relationship between the PDSCH HARQ transmission and the uplink feedback information in the specific uplink and downlink subframe configuration specified in the Rel-8 TDD.
  • the uplink subframe used for transmitting the feedback information is an uplink subframe set determined by the uplink and downlink subframe configuration information received by the evolved TDD user equipment through the user-specific high-layer signaling, and the uplink-downlink subframe configuration received through the system broadcast.
  • the downlink subframe for receiving the feedback information is a downlink subframe set determined by the uplink and downlink subframe configuration information received by the evolved TDD user equipment through the user-specific high-layer signaling, and is received by the system broadcast.
  • the subframe in the intersection of the downlink subframe set determined by the uplink and downlink subframe configuration information is not in the downlink of the intersection. Does not receive feedback information.
  • the specific uplink and downlink subframe configuration is an uplink-downlink subframe configuration corresponding to the uplink and downlink subframe configuration information received by the evolved TDD user equipment through the user-specific high-layer signaling.
  • the information of the feedback information is as follows:
  • the evolved TDD user equipment uses the subframe in the specific uplink subframe set as the uplink subframe for sending the feedback information.
  • the specific uplink subframe set is the transmission direction in any uplink and downlink subframe configuration.
  • Upstream subframes such as subframe 2 and/or subframe 7; and subframes in a specific downlink subframe set as downlink subframes for receiving feedback information; wherein, the specific downlink subframe set is any uplink and downlink subframe
  • the transmission direction in the frame configuration is a downlink subframe, such as at least one of subframes 0, 1, 5, and 6.
  • step 501 is performed first, and then step 601 is performed, and step 502 and step 602 have no necessary timing relationship, as long as step 502 is guaranteed.
  • step 602 is after step 601.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the application can be in the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
  • the application can be 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.
  • 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 configuration of the TDD uplink and downlink subframes is configured for the user equipment by using the high-level signaling, thereby shortening the change period, adapting to the change of the service requirements, and not requiring all user equipments in the cell to re-read the system messages frequently, thereby saving users.
  • the power consumption of the device is configured for the user equipment by using the high-level signaling, thereby shortening the change period, adapting to the change of the service requirements, and not requiring all user equipments in the cell to re-read the system messages frequently, thereby saving users.

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Abstract

Les modes de réalisation de la présente invention portent sur le domaine technique de la communication sans fil, et notamment sur un procédé, un système et un dispositif pour transmettre des données dans une trame sans fil duplex à répartition dans le temps (TDD), et sont utilisés pour résoudre le problème de l'état antérieur de la technique selon lequel la configuration de sous-trame de liaison montante et de liaison descendante dans une cellule TDD ne peut pas s'adapter à des changements de demande de service. Le procédé pour transmettre des données dans une trame sans fil TDD fourni par les modes de réalisation de la présente invention comprend les opérations suivantes : un côté réseau détermine des informations de configuration de sous-trame de liaison montante et de liaison descendante d'un dispositif utilisateur TDD pouvant évoluer, et transmet les informations de configuration de sous-trame de liaison montante et de liaison descendante au dispositif utilisateur TDD à évolution par l'intermédiaire de la signalisation de couche élevée privée d'utilisateur ; ledit côté réseau transmet des données par l'intermédiaire d'une trame sans fil TDD. La présente invention configure une sous-trame de liaison montante et de liaison descendante TDD pour le dispositif utilisateur à l'aide de la signalisation de couche élevée, permettant ainsi d'assurer une réduction de la période de variation et de s'adapter aux changements de demande de service ; de plus, l'invention permet d'éviter le besoin pour tous les dispositifs utilisateur dans la cellule de relire de manière fréquente les informations de système et de réduire la consommation d'énergie du dispositif utilisateur.
PCT/CN2012/079832 2011-08-08 2012-08-08 Procédé, système et dispositif pour transmettre des données dans une trame sans fil duplex à répartition dans le temps (tdd) WO2013020508A1 (fr)

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