WO2016109978A1 - Procédé et appareil de transmission de données - Google Patents

Procédé et appareil de transmission de données Download PDF

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Publication number
WO2016109978A1
WO2016109978A1 PCT/CN2015/070450 CN2015070450W WO2016109978A1 WO 2016109978 A1 WO2016109978 A1 WO 2016109978A1 CN 2015070450 W CN2015070450 W CN 2015070450W WO 2016109978 A1 WO2016109978 A1 WO 2016109978A1
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WIPO (PCT)
Prior art keywords
component carrier
retransmission
available
carrier
determining
Prior art date
Application number
PCT/CN2015/070450
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English (en)
Inventor
Hongmei Liu
Lei Jiang
Zhennian SUN
Chuangxin JIANG
Gang Wang
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Nec Corporation
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Publication date
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Priority to PCT/CN2015/070450 priority Critical patent/WO2016109978A1/fr
Publication of WO2016109978A1 publication Critical patent/WO2016109978A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/407—Bus networks with decentralised control
    • H04L12/413—Bus networks with decentralised control with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]

Definitions

  • Embodiments of the present invention generally relate to communication techniques. More particularly, embodiments of the present invention relate to a method and apparatus for performing data transmission in a Hybrid Automatic Repeat Request (HARQ) procedure.
  • HARQ Hybrid Automatic Repeat Request
  • ARQ Automatic repeat request
  • ACK acknowledgment
  • NACK negative acknowledgment
  • Hybrid automatic repeat request is a combination of high-rate forward error-correcting coding and ARQ error-control.
  • HARQ with Chase combining and IR combining is an effective way to decrease the latency and provide time diversity gain for data transmission.
  • unlicensed carrier has been introduced to provide additional spectrum resource.
  • the carrier availability is uncertain due to regulations and there is restriction on the maximum available time.
  • the component carrier that carries first transmission of a data block may be unavailable for carrying the retransmission of the data block due to the uncertain carrier availability.
  • the present invention proposes a solution for data transmission in a HARQ procedure. Specifically, the present invention provides a method and apparatus for determining a component carrier for carrying the retransmission of the data block based on channel availability.
  • embodiments of the invention provide a method for performing data transmission in a HARQ procedure.
  • the method may comprise: transmitting first transmission of a data block to a receiver, wherein a data channel of the first transmission is carried on a first component carrier; in response to receiving from the receiver a negative acknowledge message indicating the first transmission is failed, determining a second component carrier for retransmission of the data block based on carrier availability; and performing the retransmission on the second component carrier.
  • embodiments of the invention provide a method for performing data transmission in a HARQ procedure.
  • the method may comprise: in response to that first transmission of a data block is failed, transmitting a negative acknowledge message to a transmitter, wherein a data channel of the first transmission is carried on a first component carrier; and receiving retransmission of the data block on a second component carrier, wherein the second component carrier is determined based on carrier availability.
  • embodiments of the invention provide an apparatus for performing data transmission in a HARQ procedure.
  • the apparatus may comprise: a transmitting unit configured to transmit first transmission of a data block to a receiver, wherein a data channel of the first transmission is carried on a first component carrier; a determining unit configured to,in response to receiving from the receiver a negative acknowledge message indicating the first transmission is failed, determine a second component carrier for retransmission of the data block based on carrier availability; and a performing unit configured to perform the retransmission on the second component carrier.
  • embodiments of the invention provide an apparatus for performing data transmission in a HARQ procedure.
  • the apparatus may comprise: a transmitting unit configured to, in response to that first transmission of a data block is failed, transmit a negative acknowledge message to a transmitter, wherein a data channel of the first transmission is carried on a first component carrier; and a receiving unit configured to receive retransmission of the data block on a second component carrier, wherein the second component carrier is determined based on carrier availability.
  • the proposed solution is directed to a HARQ procedure, in which a component carrier for carrying retransmission of a data block can be determined based on channel availability.
  • FIG. 1 illustrates a flow chart of a method 100 for performing data transmission in a HARQ procedure at a transmitter according to embodiments of the invention
  • FIG. 2 illustrates a flow chart of a method 200 for performing data transmission in a HARQ procedure at a transmitter according to embodiments of the invention
  • FIG. 3 illustrates a flow chart of a method 300 for performing data transmission in a HARQ procedure at a transmitter according to further embodiments of the invention
  • FIG. 4 illustrates a flow chart of a method 400 for performing data transmission in a HARQ procedure at a receiver according to further embodiments of the invention
  • FIG. 5A illustrates a schematic diagram of a HARQ procedure 500 in a Time Division Duplex (TDD) system according to embodiments of the invention
  • FIG. 5B illustrates a schematic diagram of a HARQ procedure 510 in a Frequency Division Duplex (FDD) system according to embodiments of the invention
  • FIG. 6A illustrates a schematic diagram of a HARQ procedure 600 in a TDD system according to embodiments of the invention
  • FIG. 6B illustrates a schematic diagram of a HARQ procedure 610 in a FDD system according to embodiments of the invention
  • FIG. 7 illustrates a block diagram of an apparatus 700 for performing data transmission in a HARQ procedure according to embodiments of the invention.
  • FIG. 8 illustrates a block diagram of an apparatus 800 for performing data transmission in a HARQ procedure according to embodiments of the invention.
  • Embodiments of the present invention are directed to a solution for performing data transmission in a HARQ procedure.
  • the solution may be carried out between a receiver and a transmitter.
  • the transmitter transmits firsttransmission of a data block to a receiver by using a first component carrier.
  • the transmitter determines based on carrier availabilitv a second component carrier for retransmission of the data block and performs the retransmission by using the second component carrier.
  • the HARQ procedure may be used in downlink cellular transmission.
  • the receiver may comprise user equipment (UE), such as a terminal, a Mobile Terminal (MT) , a Subscriber Station (SS), a Portable Subscriber Station (PSS) , Mobile Station (MS) , or an Access Terminal (AT) .
  • the transmitter may comprise a base station (BS) , such as a node B (NodeB or NB) , or an evolved NodeB (eNodeB or eNB) .
  • NodeB or NB node B
  • eNodeB or eNB evolved NodeB
  • the cross carrier HARQ procedure may be used in D2D transmission.
  • the receiver may be a Device-to-Device (D2D) receiver and the transmitter may be a D2D transmitter.
  • D2D Device-to-Device
  • Embodiments of the present invention may be applied in various communication systems, including but not limited to a Long Term Evolution (LTE) system or a Long Term Evolution Advanced (LTE-A) system.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution Advanced
  • FIG. 1 illustrates a flow chart of a method 100for performing data transmission in a HARQ procedure at a transmitter according to embodiments of the invention.
  • the method 100 may be performed at a transmitter, sueh as a BS, a D2D transmitter, and other suitable device.
  • the transmitter transmits first transmission of a data block to a receiver by using a first component carrier.
  • the receiver may send a negative acknowledge message, for example NACK, to the transmitter to request retransmission.
  • the transmitter may retransmit the data block to the receiver by using a second component carrier.
  • the first transmission of the data block may comprise a data portion and a control portion.
  • the data portion comprises the transmitted data block, which may be carried on a data channel of the first transmission, for example, Physical Downlink Shared Channel (PDSCH) .
  • the control portion comprises control information of the first transmission, which may be carried on a control channel of the first transmission, for example, Physical Downlink Control Channel (PDCCH) .
  • the retransmission of the data block may likewise comprise a data portion and a control portion.
  • the data channel and the control channel may be carried on the same component carrier, which may be called as “self-scheduling. ”
  • the data channel and the control channel may be carried on different component carriers, which may be called as “cross carrier scheduling. ”
  • step S 110 first transmission of a data block is transmitted to a receiver.
  • the first transmission may employ either self-scheduling or cross carrier scheduling.
  • the component carrier carrying the data channel of the first transmission may be called as “first component carrier” .
  • the first component carrier may be a licensed carrier or an unlicensed carrier.
  • the receiver may send a negative acknowledge message, for example NACK, to the transmitter to request retransmission.
  • a negative acknowledge message for example NACK
  • the transmitter may retransmit the data block to the receiver.
  • the retransmission may be performed on the second component carrier that may be the same as the first component carrier or different from the first component carrier. Similar to the first transmission, the retransmission may employ either self-scheduling or cross carrier scheduling. If the self-scheduling is employed, the second component carrier may be used in carrying both the data channel (for example, PDSCH) and the control channel (for example, PDCCH) of the retransmission. Alternatively, if the cross carrier scheduling is employed, the second component carrier may be used in carrying the data channel of the retransmission.
  • both licensed carriers and unlicensed carriers may be employed by the retransmission. Since the carrier availability may be uncertain due to regulations, restrictions, occupations, and so on, there is a need to determine a component carrier for the retransmission before retransmitting the data block.
  • a second component carrier for retransmission of the data block is determined based on carrier availability.
  • the second component carrier may be determined in several ways.
  • whether the first component carrier is available for the retransmission may be determined first.
  • the first component carrier may be determined as the second component carrier.
  • the first component carrier may be determined as the second component carrier once the first component is available. Details of the embodiment will be described with reference to FIG. 2.
  • At least one candidate component carrier available for the retransmission may be determined first, and then the second component carrier may be determined based on the at least one candidate component carrier.
  • one or more candidate component carriers may be determined as available for the retransmission by means of energy detection, carrier sensing, and so on.
  • the second component carrier may be selected from the candidate component carriers based on load status or channel quality thereof. Details of the embodiment will be described with reference to FIG. 3.
  • the retransmission is performed on the second component carrier.
  • the retransmission may employ the self-scheduling, thus both the data channel (for example, PDSCH) and the control channel (for example, PDCCH) of the retransmission may be carried on the determined second component carrier.
  • the retransmission may employ the cross carrier scheduling, and the data channel of the retransmission may be carried on the second component carrier.
  • FIG. 2 illustrates a flow chart of a method 200 for performing data transmission in a HARQ procedure at a transmitter according to embodiments of the invention.
  • the method 200 may be considered as a specific implementation of the method 100 described above with reference to Fig. 1.
  • when the retransmission is to be performed whether the first component carrier is available is determined. If the first component carrier is available, it is used in the retransmission; otherwise, the transmitter will wait until the first component carrier is available.
  • Method 200 starts at step S210, wherein first transmission of a data block is transmitted to a receiver, wherein a data channel of the first transmission is carried on a first component carrier.
  • the first component carrier may be a licensed carrier or an unlicensed carrier.
  • the receiver may send a negative acknowledge message, for example NACK, to the transmitter to request retransmission.
  • a negative acknowledge message for example NACK
  • the transmitter may perform retransmission of the data block to the receiver.
  • the transmitter may determine a component carrier for use in the retransmission.
  • step S220 determining whether the first component carrier is available for the retransmission.
  • the carrier availability may be checked by determining whether a component carrier is available for the retransmission.
  • whether the first component carrier is available for the retransmission may be determined in several ways, such as energy detection, carrier sensing, and so on.
  • strength of energy from a further transmitter may be measured on the first component carrier.
  • the further transmitter may be a transmitter that may use the first component carrier and is different from the transmitter performing the method according to embodiments of the present invention. Ifthe energy strength is not strong, it may be determined that the first component carrier is idle. In this regard, the energy strength may be compared with a strength threshold. In response to that the measured strength is less than the strength threshold, the first component carrier may be determined as available for the retransmission.
  • the strength threshold may be a predetermined threshold, which may be set according to system requirements, specifications, channel quality, and so on. According to embodiments of the present invention, the strength threshold may be set as a fixed value or a value that is changed dynamically.
  • the carrier availability may be detected based on carrier sensing.
  • a signalling from a further transmitter may be detected on the first component carrier.
  • the further transmitter may be a transmitter that may use the first component carrier and is different from the transmitter performing the method according to embodiments of the present invention.
  • the signalling may for example contain information about whether the further transmitter occupies the first component carrier, the corresponding occupation time period, and the like.
  • whether the first component carrier is available for the retransmission may be determined. For instance, if the signalling contains information indicating that a further transmitter occupies the first component carrier, it may be determined that the first component carrier is unavailable for the retransmission.
  • step S230 in response to that the first component carrier is available for the retransmission, determining the first component carrier as the second component carrier. In this way, the first component carrier can be used as the component carrier of the retransmission.
  • step S240 in response to that the first component carrier is unavailable for the retransmission, the carrier availability of the first carrier is monitored until the first component carrier is available, and the first component carrier is determined as the second component carrier.
  • the transmitter may wait until the first component carrier becomes available. During the waiting period, the transmitter may continue monitoring the carrier availability of the first component carrier until the first component carrier is available. When the first component carrier becomes available, it may be determined as the second component carrier.
  • the transmitter may wait for a predetermined period and detect the carrier availability of the first component carrier in the predetermined period. Once the first component carrier becomes available in the predetermined period, the transmitter may determine the first component carrier as the second component carrier.
  • the predetermined period may be set according to system requirements, specifications, and so on. According to embodiments of the present invention, the predetermined period may be set as a fixed value or a value that is changed dynamically. It is to be understood that the above examples are only for the purpose of illustration, without suggesting any limitations on the subject matter described herein. For example, the predetermined period may be implemented in any other suitable ways.
  • the retransmission is performed on the second component carrier. This step is similar to the step S130 of method 100. As discussed, the retransmission may employ either the self-scheduling or the cross carrier scheduling by using the second component carrier.
  • FIG. 5A illustrates a schematic diagram of a HARQ procedure 500 in a TDD system according to embodiments of the invention. It is to be noted that although the embodiments of FIG. 5A illustrate one configuration designed for the TDD system, it is described for purpose of example, rather than limitation. In alternative embodiments, other configurations designed for the TDD system are applicable as well.
  • each frame comprises 10 subframes.
  • Availability indicates whether the first component carrier is available at respective subframes. For example, at subframes 4 to 6 of Frame 0, the first component carrier is available; at subframes 6 to 9 of Frame 1, the first component carrier is unavailable; and at subframe 0 of Frame 2, the first component carrier becomes available.
  • the transmitter performs 501 first transmission of a data block to at subframe 4 of Frame 0. If the first transmission is failed, the receiver may send 502 NACK to the transmitter, at subframe 2 of Frame 1, to request retransmission. In response to NACK, the transmitter may perform retransmission of the data block to the receiver. Assuming the transmitter wants 503 to perform the retransmission at subframe 6 of Frame 1, since the first component carrier is unavailable at subframes 6-9 of Frame 1, the transmitter will monitoring the carrier availability of the first component carrier until the first component carrier becomes available, for example, at subframe 0 of Frame 2. At that time, the transmitter may determine 504 the first component carrier as the second component carrier of the retransmission and perform the retransmission on the second component carrier. In this way, the delay of the retransmission may be 4 subframes, for example, 4ms, and the Round-Trip Time (RTT) of the HARQ procedure 500 is 16ms.
  • RTT Round-Trip Time
  • FIG. 5A illustrates a schematic diagram of a HARQ procedure 510 in a FDD system according to embodiments of the invention.
  • the first component carrier is available; at subframes 2 to 5 of Frame 1, the first component carrier is unavailable; and at subframe 6 of Frame 1, the first component carrier becomes available.
  • the transmitter performs 511 first transmission of a data block to at subframe 4 of Frame 0. If the first transmission is failed, the receiver may send 512 NACK to the transmitter, at subframe 8 of Frame 0, to request retransmission. In response to NACK, the transmitter may perform retransmission of the data block to the receiver. Assuming the transmitter wants 513 to perform the retransmission at subframe 2 of Frame 1, since the first component carrier is unavailable at subframes 2-5 of Frame 1, the transmitter will monitoring the carrier availability of the first component carrier until the first component carrier becomes available, for example, at subframe 6 of Frame 1. At that time, the transmitter may determine 514 the first component carrier as the second component carrier of the retransmission and perform the retransmission on the second component carrier. In this way, the delay of the retransmission may be 4 subframes, for example 4ms, and the RTT of the HARQ procedure 510 is 12ms.
  • FIG. 3 illustrates a flow chart of a method 300 for performing data transmission in a HARQ procedure at a transmitter according to further embodiments of the invention.
  • the method 300 may be considered as a specific implementation of the method 100 described above with reference to Fig. 1.
  • the second component carrier is determined from one or more candidate component carriers available for the retransmission, wherein the candidate component carriers may comprise the first component carrier available for the retransmission, and/or other licensed or unlicensed carrier available for the retransmission.
  • Method 300 starts at step S310, wherein first transmission of a data block is transmitted to a receiver, wherein a data channel of the first transmission is carried on a first component carrier.
  • the first component carrier may be a licensed carrier or an unlicensed carrier.
  • the candidate component carrier may be a licensed carrier or an unlicensed carrier.
  • the candidate component carrier may be any other licensed or unlicensed carrier that is available for the retransmission.
  • the candidate component carrier may be determined by means of energy detection, carrier sensing, and so on.
  • strength of energy from a further transmitter may be measured on a component carrier.
  • the strength threshold may be a predetermined threshold, which may be set according to system requirements, specifications, channel quality, and so on. The strength threshold may be set as a fixed value or a value that is changed dynamically.
  • whether a candidate component carrier is available for the retransmission may be determined based on carrier sensing.
  • a signalling from a further transmitter may be detected on a component carrier and the at least one candidate component carrier may be determined based on the signalling.
  • the further transmitter is a transmitter that is different from the transmitter performing the method according to embodiments of the present invention.
  • the signalling sent from the further transmitter may for example contain infonnation about whether the further transmitter occupies a component carrier, the corresponding occupation time period, and the like. Based on the signalling, whether the component carrier is available for the retransmission may be determined. If the component carrier is available, it may be determined as a candidate component carrier.
  • candidate component carrier (s) may be determined as those available for the retransmission in a certain period.
  • a delay tolerance window of the retransmission may be obtained, and the at least one candidate component carrier available for the retransmission may be determined in the delay tolerance window.
  • the delay tolerance window may be a period of time, which may be predefined according to system requirements, specifications, and so on. According to embodiments of the present invention, the delay tolerance window may be a fixed time period or a time period that is changed dynamically.
  • the transmitter may determine, as the candidate component carriers, one or more component carrier available for the retransmission during the delay tolerance window. In this way, a component carrier that is unavailable in the delay tolerance window but available later may be not considered as a candidate component carrier.
  • the second component carrier is determined based on the at least one candidate component carrier.
  • the second component carrier may be selected from the at least one candidate component carrier based on load status or channel quality of the at least one candidate component carrier.
  • the load status of each candidate component carrier may be obtained.
  • the load status may comprise information indicating whether the load on a component carrier is light or heavy. Based on the load status, a candidate component carrier that has lighter load may be selected as the second component carrier.
  • the channel quality of each candidate component carrier may be obtained.
  • the channel quality may comprise information indicating the quality of a component carrier, such as Signal Noise Ratio (SNR) , Signal Interference Noise Ratio (SINR) , and/or the like.
  • SNR Signal Noise Ratio
  • SINR Signal Interference Noise Ratio
  • the retransmission is performed on the second component carrier.
  • the retransmission may employ either the self-scheduling or the cross carrier scheduling by using the second component carrier.
  • FIG. 6A illustrates a schematic diagram of a HARQ procedure 600 in a TDD system according to embodiments of the invention. It is to be noted that although the embodiments of FIG. 6A illustrate one configuration designed for the TDD system, it is described for purpose of example, rather than limitation. In alternative embodiments, other configurations designed for the TDD system are applicable as well.
  • each frame comprises 10 subframes.
  • Availability indicates whether the first component carrier is available at respective subframes. For example, at subframes 4 to 6 of Frame 0, the first component carrier is available; at subframes 6 to 9 of Frame 1, the first component carrier is unavailable; and at subframe 0 of Frame 2, the first component carrier is available.
  • the transmitter performs 601 first transmission of a data block to at subframe 4 of Frame 0. If the first transmission is failed, the receiver may send 602 NACK to the transmitter, at subframe 2 of Frame 1, to request retransmission. In response to NACK, the transmitter may perform retransmission of the data block to the receiver. Assuming the transmitter wants 603 to perform the retransmission at subframe 6 of Frame 1, the transmitter may first determine one or more candidate component carriers which are available at subframe 6 of Frame 1. Since the first component carrier is unavailable at subframe 6 of Frame 1, the first component carrier will not be determined as a candidate component carrier. Then, the transmitter may select one from the one or more candidate component carriers as the second component carrier to perform the retransmission. As such, the retransmission may start at subframe 6 of Frame 1, and the delay of the retransmission may be removed. In this way, the RTT in the HARQ procedure 600 is 12ms, less than the 16ms in the HARQ procedure 500.
  • FIG. 6A illustrates a schematic diagram of a HARQ procedure 610 in a FDD system according to embodiments of the invention.
  • the first component carrier is available; at subframes 2 to 5 of Frame 1, the first component carrier is unavailable; and at subframe 6 of Frame 1, the first component carrier is available.
  • the transmitter performs 611 first transmission of a data block to at subframe 4 of Frame 0. If the first transmission is failed, the receiver may send 612 NACK to the transmitter, at subframe 8 of Frame 0, to request retransmission. In response to NACK, the transmitter may perform retransmission of the data block to the receiver. Assuming the transmitter wants 613 to perform the retransmission at subframe 2 of Frame 1, the transmitter may first determine one or more candidate component carriers which are available at subframe 2 of Frame 1. Since the first component carrier is unavailable at subframe 2 of Frame 1, the first component carrier will not be determined as a candidate component carrier. Then, the transmitter may select one from the one or more candidate component carriers as the second component carrier to perform the retransmission.
  • the retransmission may start at subframe 2 of Frame 1, and the delay of the retransmission may be removed.
  • the RTT in the HARQ procedure 610 is 8ms, less than the 12ms in the HARQ procedure 510.
  • FIG. 4 illustrates a flow chart of a method 400 for performing data transmission in a HARQ procedure at a receiver according to further embodiments of the invention.
  • the method 400 may be performed at a receiver, such as a UE, a D2D receiver, and other suitable device.
  • a negative acknowledge message is sent to a transmitter, wherein a data channel of the first transmission is carried on a first component carrier.
  • retransmission of the data block is received on a second component carrier, wherein the second component carrier is determined based on carrier availability.
  • the second component carrier may be determined as the first component carrier available for the retransmission.
  • the second component carrier may be determined by: determining whether the first component carrier is available for the retransmission; in response to that the first component carrier is available for the retransmission, determining the first component carrier as the second component carrier; and in response to that the first component carrier is unavailable for the retransmission, monitoring the carrier availability of the first carrier until the first component carrier is available, and determining the first component carrier as the second component carrier. Details may be found in embodiments described with reference to FIG. 2.
  • the second component carrier may be determined based on at least one candidate component carrier available for the retransmission.
  • the second component carrier may be selected from the at least one candidate component carrier based on load status or channel quality of the at least one candidate component carrier. Details may be found in embodiments described with reference to FIG. 3.
  • FIGs. 7 and 8 relate to block diagrams of apparatus for performing data transmission in a HARQ procedure according to embodiments of the invention, respectively.
  • FIG. 7 illustrates a b1ock diagram of an apparatus 700.
  • the apparatus 700 may be implemented at a transmitter, for example, a B S, a D2D transmitter or any other applicable device.
  • the apparatus 700 comprises: a transmitting unit 710 configured to transmit first transmission of a data block to a receiver, wherein a data channel of the first transmission is carried on a first component carrier; a determining unit 720 configured to, in response to receiving from the receiver a negative acknowledge message indicating the first transmission is failed,determine a second component carrier for retransmission of the data block based on carrier availability; and a performing unit 73 0 configured to perform the retransmission on the second component carrier.
  • a transmitting unit 710 configured to transmit first transmission of a data block to a receiver, wherein a data channel of the first transmission is carried on a first component carrier
  • a determining unit 720 configured to, in response to receiving from the receiver a negative acknowledge message indicating the first transmission is failed,determine a second component carrier for retransmission of the data block based on carrier availability
  • a performing unit 73 0 configured to perform the retransmission on the second component carrier.
  • the determining unit 720 may comprise: a first availability determining unit configured to determine whether the first component carrier is available for the retransmission.
  • the deterinining unit may be further configured to, in response to that the first component carrier is available for the retransmission, determine the first component carrier as the second component carrier; and in response to that the first component carrier is unavailable for the retransmission, monitor the carrier availability of the first carrier until the first component carrier is available and determine the first component carrier as the second component carrier.
  • the first availability determining unit may comprise: ameasuring unit configured to measure strength of energy from a further transmitter on the first component carrier, and wherein the first availability determining unit may be further configured to, in response to that the measured strength is less than a strength threshold, determine that the first component carrier is available for the retransmission.
  • the first availability determining unit may comprise: a detecting unit configured to detect, on the first component carrier, a signalling from a further transmitter, and wherein the first availability determining unit may be further configured to determine whether the first component carrier is available for the retransmission based on the signalling.
  • the determining unit 720 may comprise: a second availability determining unit configured to determine at least one candidate component carrier available for the retransmission, and wherein the determining unit may be further configured to determine the second component carrier based on the at least one candidate component carrier.
  • the second availability determining unit may comprise: an obtaining unit configured to obtain a delay tolerance window of the retransmission, and wherein the second availability determining unit may be further configured to determine, in the delay tolerance window, the at least one candidate component carrier available for the retransmission.
  • the second availability determining unit may comprise: a measuring unit configured to measure strength of energy from a further transmitter on a component carrier, and wherein the second availability determining unit may be further configured to, in response to that the measured signal strength is less than a strength threshold, determine the component carrier as a candidate component carrier.
  • the second availability determining unit may comprise: a detecting unit configured to detect, on a component carrier, a signalling from a further transmitter, and wherein the second availability determining unit may be further configured to determine the at least one candidate component carrier based on the signalling.
  • the determining unit may comprise: a selecting unit configured to select the second component carrier from the at least one candidate component carrier based on load status or channel quality of the at least one candidate component carrier.
  • FIG. 8 illustrates a block diagram of an apparatus 800 for performing data transmission in a HARQ procedure according to embodiments of the invention.
  • the apparatus 800 may be implemented at a receiver, for example, a cellular UE, a D2D receiver or any other applicable device.
  • the apparatus 800 comprises: a sending unit 810 configured to, in response to that first transmission of a data block is failed, send a negative acknowledge message to a transmitter, wherein a data channel of the first transmission is carried on a first component carrier; and a receiving unit 820 configured to receive retransmission of the data block on a second component carrier, wherein the second component carrier is determined based on carrier availability.
  • the second component carrier may be determined by: determining whether the first component carrier is available for the retransmission; in response to that the first component carrier is available for the retransmission, determining the first component carrier as the second component carrier; and in response to that the first component carrier is unavailable for the retransmission, monitoring the carrier availability of the first carrier until the first component carrier is available, and determining the first component carrier as the second component carrier.
  • the second component carrier may be determined based on at least one candidate component carrier available for the retransmission.
  • the second component carrier is selected from the at least one candidate component carrier based on load status or channel quality of the at least one candidate component carrier.
  • apparatuses 700 and 800 may be respectively implemented by any suitable technique either known at present or developed in the future. Further, a single device shown in FIG. 7 or FIG. 8 may be alternatively implemented in multiple devices separately, and multiple separated devices may be implemented in a single device. The scope of the present invention is not limited in these regards.
  • the apparatus 700 may be configured to implement functionalities as described with reference to FIGs. 1-3, and the apparatus 800 may be configured to implement functionalities as described with reference to FIG. 4. Therefore, the features discussed with respect to any of methods 100-300 may apply to the conesponding components of the apparatus 700, and the features discussed with respect to the method 400 may apply to the corresponding components of the apparatus 800. It is further noted that the components of the apparatus 700 or 800 may be embodied in hardware, software, firmware, and/or any combination thereof. For example, the components of the apparatus 700 or 800 may be respectively implemented by a circuit, a processor or any other appropriate device. Those skilled in the art will appreciate that the aforesaid examples are only for illustration not limitation.
  • the apparatus 700 or 800 may comprise at least one processor.
  • the at least one processor suitable for use with embodiments of the present disclosure may include, by way of example, both general and special purpose processors already known or developed in the future.
  • the apparatus 700 or 800 may further comprise at least one memory.
  • the at least one memory may include, for example, semiconductor memory devices, e.g., RAM, ROM, EPROM, EEPROM, and flash memory devices.
  • the at least one memory may be used to store program of computer executable instructions.
  • the program can be written in any high-level and/or low-level compliable or interpretable programming languages.
  • the computer executable instructions may be configured, with the at least one processor, to cause the apparatus 700 to at least perform according to any of methods 100 to 300 as discussed above, or to cause the apparatus 800 to at least perform according to method 400 as discussed above.
  • the present disclosure may be embodied in an apparatus, a method, or a computer program product.
  • the various exemplary embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the disclosure is not limited thereto.
  • FIGs. 1-4 may be viewed as method steps, and/or as operations that result from operation of computer program code, and/or as a plurality of coupled logic circuit elements constructed to carry out the associated function (s) .
  • At least some aspects of the exemplary embodiments of the disclosures may be practiced in various components such as integrated circuit chips and modules, and that the exemplary embodiments of this disclosure may be realized in an apparatus that is embodied as an integrated circuit, FPGA or ASIC that is configurable to operate in accordance with the exemplary embodiments of the present disclosure.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de l'invention concernent un procédé et un appareil permettant d'effectuer une transmission de données dans une procédure HARQ. Le procédé peut comprendre les étapes consistant à : effectuer une première transmission d'un bloc de données vers un récepteur, un canal de données de la première transmission étant porté sur une première porteuse composite; en réponse à la réception, depuis le récepteur, d'un message d'accusé de réception négatif indiquant que la première transmission a échoué, déterminer une seconde porteuse composite pour une retransmission du bloc de données en fonction de la disponibilité de porteuse; et effectuer la retransmission sur la seconde porteuse composite.
PCT/CN2015/070450 2015-01-09 2015-01-09 Procédé et appareil de transmission de données WO2016109978A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101378306A (zh) * 2007-08-31 2009-03-04 华为技术有限公司 控制信道分配及ack/nack信道分配指示的方法和装置
KR20110066833A (ko) * 2009-12-11 2011-06-17 엘지전자 주식회사 캐리어 집합을 지원하는 무선 이동 통신 시스템에 있어서, ack/nack 신호를 전송하는 방법 및 장치
CN104170306A (zh) * 2014-01-29 2014-11-26 华为技术有限公司 一种数据传输方法、设备和系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101378306A (zh) * 2007-08-31 2009-03-04 华为技术有限公司 控制信道分配及ack/nack信道分配指示的方法和装置
KR20110066833A (ko) * 2009-12-11 2011-06-17 엘지전자 주식회사 캐리어 집합을 지원하는 무선 이동 통신 시스템에 있어서, ack/nack 신호를 전송하는 방법 및 장치
CN104170306A (zh) * 2014-01-29 2014-11-26 华为技术有限公司 一种数据传输方法、设备和系统

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