WO2012163170A1 - Procédé et dispositif de transmission de données - Google Patents

Procédé et dispositif de transmission de données Download PDF

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Publication number
WO2012163170A1
WO2012163170A1 PCT/CN2012/073345 CN2012073345W WO2012163170A1 WO 2012163170 A1 WO2012163170 A1 WO 2012163170A1 CN 2012073345 W CN2012073345 W CN 2012073345W WO 2012163170 A1 WO2012163170 A1 WO 2012163170A1
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WO
WIPO (PCT)
Prior art keywords
subframe
data
type
downlink
ack
Prior art date
Application number
PCT/CN2012/073345
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English (en)
Chinese (zh)
Inventor
徐婧
潘学明
沈祖康
Original Assignee
电信科学技术研究院
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Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Publication of WO2012163170A1 publication Critical patent/WO2012163170A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements

Definitions

  • the present invention claims the priority of a Chinese patent application filed on June 1, 2011 by the Chinese Patent Office, Application No. 201110146060.0, entitled “A Method and Apparatus for Data Transmission", The entire contents are incorporated herein by reference.
  • TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a method and apparatus for data transmission.
  • TDD Time Division Duplexing, time division duplex
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division multiple access
  • 4G 4 th -Generation, fourth-generation communication system
  • TD-LTE Time division long Term Evolution, LTE division
  • the patent application number 201010567764.0 proposes a dynamic uplink and downlink subframe allocation scheme.
  • the solution is: setting a four-seed frame type in a certain period of time, including a subframe fixed for downlink transmission, a subframe fixed for uplink transmission, a special subframe, and a flexible allocated subframe, the subframe may be Used for uplink or downlink transmission. As shown in FIG.
  • the time period is a radio frame (only one example, and may be other time periods), where subframe 0 and subframe 5 are fixed downlink subframes, and subframe 2 and subframe 7 are Fixed uplink subframes, subframe 1 and subframe 6 are special subframes (which can also be classified as fixed downlink subframes), and other subframes (ie, subframes 3, 4, 8, and 9) are flexible allocated subframes (Flexible Subframe) ).
  • the base station can be dynamically configured according to real-time service requirements and channel conditions to adapt to dynamic changes in service requirements.
  • a method for downlink transmission on a data receiving end in a dynamic subframe system where the dynamic subframe system is composed of at least four types of subframes, wherein the first type of subframe can only be used for downlink transmission, and the second type of subframe can only be used for downlink transmission.
  • the third type of subframe may be dynamically configured for uplink or downlink transmission, the third type of subframe may not be used for both uplink and downlink transmission, and the fourth type of subframe is a special time slot,
  • the fourth type of subframe includes a downlink pilot time slot (DwPTS), a guard interval (GP) and an uplink pilot time slot (UpPTS); the method includes the following steps:
  • the receiving end After receiving the data, the receiving end only feeds back ACK or NACK in the second type of subframe.
  • a method for downlink transmission on a data transmitting end in a dynamic subframe system where the dynamic subframe system is composed of at least four types of subframes, wherein the first type of subframes can only be used for downlink transmission, and the second type of subframes can only be used for downlink transmission.
  • the third type of subframe may be dynamically configured for uplink or downlink transmission, the third type of subframe may not be used for both uplink and downlink transmission, and the fourth type of subframe is a special time slot,
  • the fourth type of subframe includes a downlink pilot time slot (DwPTS), a guard interval (GP) and an uplink pilot time slot (UpPTS); the method includes the following steps:
  • the transmitting end only receives an ACK or a NACK in the second type of subframe.
  • a receiving end device for downlink transmission in a dynamic subframe system where the dynamic subframe system is composed of at least four types of subframes, wherein the first type of subframe can only be used for downlink transmission, and the second type of subframe is only used for downlink transmission. Can be used for uplink transmission, the third type of subframe can be dynamically configured for uplink or downlink transmission, the third type of subframe cannot be used for both uplink and downlink transmission, and the fourth type of subframe is a special time slot.
  • the fourth type of subframe includes a downlink pilot time slot (DwPTS), a guard interval (GP) and an uplink pilot time slot (UpPTS);
  • the receiving device includes:
  • An interface module configured to receive data in a downlink pilot time slot of the first type of subframe or the third type of subframe or the fourth type of subframe; and only in the second type of subframe Feedback ACK or NACK;
  • the control module is configured to detect the received data, and according to the detection result, instruct the interface module to feed back an ACK or a NACK only in the second type of subframe.
  • a transmitting end device for downlink transmission in a dynamic subframe system where the dynamic subframe system is composed of at least four types of subframes, wherein the first type of subframes can only be used for downlink transmission, and the second type of subframes only Can be used for uplink transmission, the third type of subframe can be dynamically configured for uplink or downlink transmission, the third type of subframe cannot be used for both uplink and downlink transmission, and the fourth type of subframe is a special time slot.
  • the fourth type of subframe includes a downlink pilot time slot (DwPTS), and a guard interval (GP) And an uplink pilot time slot (UpPTS);
  • the sender device includes:
  • An interface module configured to send data in a downlink pilot time slot of the first type or the third type of subframe or the fourth type of subframe; and receive an ACK only in the second type of subframe Or NACK;
  • the control module is configured to determine that the received feedback only occurs in the second type of subframe according to the subframe in which the transmitted data is located, and instruct the interface module to receive an ACK or a NACK only in the second type of subframe.
  • FIG. 1 is a schematic diagram of a radio frame structure in the prior art
  • FIG. 2 is a flowchart of a method for downlink transmission on a data receiving end in a dynamic subframe system according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for downlink transmission at a data transmitting end in a dynamic subframe system according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a detailed method for downlink data transmission in a dynamic subframe system according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a timing relationship of configuration 0 according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a timing relationship of configuration 1 according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a timing relationship of configuration 3 in an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a timing relationship of configuration 6 in an embodiment of the present invention.
  • FIG. 10 is a structural diagram of a receiving end device according to an embodiment of the present invention.
  • FIG. 11 is a structural diagram of a device at a transmitting end according to an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE INVENTION In the embodiment of the present invention, a new HARQ timing relationship is designed for a dynamic subframe system, and downlink transmission and feedback are performed by using the timing relationship, and data transmission is realized when dynamically uplink and downlink subframes are allocated.
  • the dynamic subframe system is composed of at least four types of subframes, where the first type of subframes can only be used for downlink transmission, and can be called fixed downlink subframes; the second type of subframes can only be used for uplink transmission, which can be called Fixed uplink subframes; the third type of subframes can be dynamically configured for uplink or downlink transmission, which can be called flexible configured subframes, but the third type of subframes cannot be used for both uplink and downlink transmissions;
  • the subframe is a special time slot, and the fourth type of subframe includes a downlink pilot time slot (DwPTS), a guard interval (GP), and an uplink pilot time slot (UpPTS).
  • DwPTS downlink pilot time slot
  • GP guard interval
  • UpPTS uplink pilot time slot
  • Step 201 The receiving end is in the first type subframe or the third type subframe or the fourth class.
  • the data is received in the downlink pilot time slot of the subframe.
  • Step 202 After the receiving end receives the data, only the ACK (correct response) or NACK (error response) is fed back in the second type of subframe.
  • the method for downlink transmission on the data sending end in the dynamic subframe system in this embodiment is as follows:
  • Step 301 The transmitting end sends the data in a downlink pilot time slot of the first type or the third type of subframe or the fourth type of subframe.
  • Step 302 The transmitting end only receives an ACK or a NACK in the second type of subframe.
  • the transmitted data includes at least downlink data on a downlink shared channel (DSCH, Downlink Shared Channel) or data on a downlink control channel (PDCCH) indicating downlink semi-persistent scheduling (SPS) release.
  • DSCH Downlink shared channel
  • PDCCH downlink control channel
  • SPS downlink semi-persistent scheduling
  • the downlink pilot time slot of the first type of subframe or the third type of subframe or the fourth type of subframe that is available for data transmission corresponds to one feedback subframe, and the feedback subframe is the data.
  • scheduling signaling for data occurs in a subframe in which data is transmitted, and the receiving end receives and detects data at a corresponding location according to scheduling signaling.
  • the data transmission in this embodiment may occur between the UE and the base station, between the UE and the relay node (RN), or between the relay node and the base station.
  • the receiving end is the UE
  • the transmitting end is the base station.
  • the receiving end is the UE
  • the transmitting end is the relay node.
  • the receiving end is a relay node
  • the transmitting end is a base station.
  • the transmitting end when transmitting data in the subframe n, receives the ACK or NACK corresponding to the data only in the subframe n+k. Similarly, when receiving data in subframe n, the receiving end feeds back the ACK or NACK corresponding to the data only in subframe n+k. Where k is determined by the subframe n and the preset timing relationship, and the timing relationship specifies that the ACK or NACK of the feedback only occurs in the second type of subframe.
  • the timing relationship is pre-stored between the transmitting end and the receiving end, and then data transmission and feedback are respectively performed according to the timing relationship.
  • D represents a first type of subframe
  • U represents a second type of subframe
  • S represents a fourth type of subframe
  • X is a third type of subframe
  • Xd is flexibly configured as a downlink.
  • Subframe, A denotes the subframe in which the feedback is transmitted, and the corresponding subframe of "#" is used for data transmission (including the first data transmission and retransmission of data).
  • Table 1 can be extracted from Figure 4:
  • n represents a PDSCH (Physical Downlink Shared Data Channel) or a subframe number of a downlink control channel (PDCCH, Physical Downlink Control Channel) indicating downlink half-persistent scheduling (SPS) release
  • k represents ACK or NACK feedback and PDSCH data transmission.
  • the number of subframes between them, so n+k means ACK or NACK Subframe number.
  • the ACK or the NACK is transmitted through a PUCCH (Physical Uplink Control CHannel) or a PUSCH (Physical Uplink Shared Channel).
  • the timing relationship shown in Figure 4 can have another form of representation, as shown in Table 2.
  • n represents the subframe number of the ACK or NACK feedback
  • k represents the number of subframes between the ACK or NACK feedback and the PDSCH data transmission
  • n+k represents the PDSCH (Physical Downlink Shared Data Channel) or indicates downlink semi-persistent scheduling (SPS)
  • SPS downlink semi-persistent scheduling
  • the ACK or NACK is transmitted through PUCCH (Physical Uplink Control Channel) or PUSCH (Physical Uplink Shared Data Channel).
  • the receiving end transmits the ACK or NACK feedback corresponding to the data only in subframe n+6.
  • the receiving end transmits the ACK or NACK feedback corresponding to the data only in subframe n+4.
  • the transmitting end receives the ACK or NACK feedback corresponding to the data only in subframe n+7.
  • the transmitting end receives the ACK or NACK feedback corresponding to the data only in subframe n+6.
  • the transmitting end receives the ACK or NACK feedback corresponding to the data only in subframe n+4.
  • the transmitting end receives the ACK or NACK feedback corresponding to the data only in subframe n+8.
  • the detailed method for downlink data transmission in the dynamic subframe system in this embodiment is as follows:
  • Step 501 The base station sends downlink scheduling signaling through the PDCCH on the downlink subframe, and transmits data through the PDSCH.
  • Step 502 The UE receives the downlink scheduling signaling by using the PDCCH on the corresponding subframe, and detects the PDSCH according to the PDCCH.
  • Step 503 The UE receives data through the PDSCH.
  • Step 504 The UE detects whether the data is correctly received, and if yes, proceeds to step 505, otherwise proceeds to step 506.
  • Step 505 The UE feeds back an ACK on the second type of subframe indicated by the timing relationship.
  • Step 506 The UE feeds back a NACK on the second type of subframe indicated by the timing relationship.
  • this embodiment may provide a compatible solution.
  • the control information sent by the base station also includes uplink and downlink configuration type information.
  • the base station schedules the downlink data in the same timing in the two timing relationships according to the timing relationship corresponding to the uplink and downlink configuration type and the timing relationship preset by the dynamic subframe system.
  • the timing relationship shown in Figure 4 in this embodiment is compatible with at least some of the timings of Configuration 0, Configuration 1, Configuration 3, and Configuration 6 specified in the current protocol. Refer to the HARQ timing relationship of configuration 0, configuration 1, configuration 3, and configuration 6 shown in Figure 6-9, where the timing relationship determined by the block is a compatible timing relationship. As can be seen from Fig.
  • the timing relationship in this embodiment is compatible with configuration 0 on timings 2 and 6.
  • the timing relationship in this embodiment is compatible with configuration 1 at timings 1, 2, 5, and 6.
  • the timing relationship in this embodiment is compatible with the configuration 3 at timings 5 and 6.
  • the timing relationship in this embodiment is compatible with the configuration 6 at timings 1, 5. Therefore, the sending end can also carry process information (such as a process number) in the scheduling signaling.
  • the downlink service can be scheduled on timings 2 and 6.
  • the base station If the base station notifies the Rel-8/9/lO UE of the use of TDD UL/DL configuration 1, the downlink traffic can be scheduled on the timings 1, 2, 5 and 6.
  • the downlink traffic can be scheduled on the timings 5 and 6.
  • the downlink traffic can be scheduled on the timings 1 and 5.
  • the process is mainly implemented by the receiving end and the transmitting end.
  • the internal structure and functions of the receiving end device and the transmitting end device are introduced below.
  • the receiving end device in this embodiment includes: an interface module 1001 and a control module 1002.
  • the receiving device can be a user device or a relay device.
  • the interface module 1001 is configured to transmit various signaling and data, and in particular, receive data in a downlink pilot time slot of the first type of subframe or the third type of subframe or the fourth type of subframe;
  • the ACK or NACK is only fed back in the second type of subframe.
  • the interface module specifically for receiving data, includes at least downlink data on a downlink shared channel or data on a downlink control channel (PDCCH) indicating downlink half-persistent scheduling (SPS) release.
  • PDCCH downlink control channel
  • SPS downlink half-persistent scheduling
  • the control module 1002 is configured to generate various signaling and data, and detect the received data, and according to the detection result, instruct the interface module to feed back an ACK or a NACK only in the second type of subframe.
  • Each of the first type of subframes or the third type of subframes or the fourth type of subframe downlink pilot time slots that are available for data transmission corresponds to one feedback subframe, and the feedback subframe is corresponding to the data.
  • the interface module 1001 is configured to: when receiving data in the subframe n, feed back the ACK or NACK corresponding to the data only in the subframe n+k, where k is the subframe n and the preset timing relationship It is determined that the timing relationship specifies that the ACK or NACK of the feedback only occurs in the second type of subframe.
  • the sending end device in this embodiment includes: an interface module 1101 and a control module 1102.
  • the sender device can be a station or a relay device.
  • the interface module 1101 is configured to transmit various signaling and data, in particular, to send data in downlink pilot time slots of the first type or the third type of subframe or the fourth type of subframe; An ACK or a NACK is received in the second type of subframe.
  • the interface module 1101 is configured to include at least downlink data on a downlink shared channel or data on a downlink control channel (PDCCH) indicating downlink half-persistent scheduling (SPS) release.
  • PDCCH downlink control channel
  • SPS downlink half-persistent scheduling
  • the control module 1102 is configured to generate various signaling and data, and determine that the received feedback only occurs in the second type of subframe according to the subframe in which the transmitted data is located, and instruct the interface module 1101 to be only in the second class.
  • Each of the first type of subframes or the third type of subframes or the fourth type of subframe downlink pilot time slots that are available for data transmission corresponds to one feedback subframe, and the feedback subframe is corresponding to the data.
  • the interface module 1101 is specifically configured to: when transmitting data in the subframe n, receive an ACK or a NACK only in the subframe n+k, where k is determined by the subframe n and a preset timing relationship, in a timing relationship The received ACK or NACK only occurs in the second type of subframe.
  • a new HARQ timing relationship is designed for the dynamic subframe system, and the timing relationship is used for downlink transmission and feedback, and data transmission is realized when dynamically uplink and downlink subframes are allocated.
  • the HARQ timing relationship also has good backward compatibility.
  • 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 is in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) in which computer usable program code is embodied.
  • 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.

Abstract

La présente invention concerne un procédé de transmission de données utilisé pour transmettre des données durant une attribution dynamique de sous-trames de liaison montante et de liaison descendante. Le système de sous-trame dynamique comprend au moins quatre types de sous-trame : la première sous-trame peut uniquement être utilisée pour une transmission de liaison descendante ; la deuxième sous-trame peut être utilisée uniquement pour une transmission de liaison montante ; la troisième sous-trame peut être configurée dynamiquement pour une transmission de liaison montante ou de liaison descendante, mais ne peut pas être utilisée simultanément pour une transmission de liaison montante et de liaison descendante ; la quatrième sous-trame est un intervalle de temps spécial, comprenant un intervalle de temps pilote de liaison descendante, une période de garde, et un intervalle de temps pilote de liaison montante. À l'extrémité de réception, le procédé comprend les étapes suivantes : une extrémité de réception reçoit des données à partir de la première sous-trame, de la troisième sous-trame, ou de l'intervalle pilote de liaison descendante de la quatrième sous-trame ; l'extrémité de réception, ayant reçu des données, envoie un ACK ou un NACK de retour uniquement dans la deuxième sous-trame. La présente demande concerne un procédé de mise en œuvre pour le côté transmission et un dispositif permettant de réaliser ledit procédé.
PCT/CN2012/073345 2011-06-01 2012-03-30 Procédé et dispositif de transmission de données WO2012163170A1 (fr)

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CN201110146060.0 2011-06-01

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