WO2016179831A1 - Procédés et appareils de transmission et de réception de données dans un système de communication sans-fil - Google Patents

Procédés et appareils de transmission et de réception de données dans un système de communication sans-fil Download PDF

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Publication number
WO2016179831A1
WO2016179831A1 PCT/CN2015/078960 CN2015078960W WO2016179831A1 WO 2016179831 A1 WO2016179831 A1 WO 2016179831A1 CN 2015078960 W CN2015078960 W CN 2015078960W WO 2016179831 A1 WO2016179831 A1 WO 2016179831A1
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WIPO (PCT)
Prior art keywords
resource
control
subframe
channel
control information
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PCT/CN2015/078960
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English (en)
Inventor
Hongmei Liu
Lei Jiang
Chuangxin JIANG
Yukai GAO
Zhennian SUN
Gang Wang
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Nec Corporation
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Priority to PCT/CN2015/078960 priority Critical patent/WO2016179831A1/fr
Publication of WO2016179831A1 publication Critical patent/WO2016179831A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • Embodiments of the present disclosure generally relate to wireless communication techniques and more particularly relate to a method and apparatus for data transmission in a wireless communication system and a method and apparatus for data receiving in a wireless communication.
  • Licensed-Assisted Access introduces the data transmission from the licensed carrier resource to the unlicensed carrier resource on small cells to deliver a data speed boost to terminal devices.
  • 3GPP 3rd Generation Partnership Project
  • LBT Listen Before Talk
  • the transmission on the unlicensed carrier can only be performed when the LBT result shows that the channel is idle; otherwise the transmission will not be performed on the unlicensed carrier.
  • Cross carrier scheduling is a scheduling solution in which the control information for data transmission is transmitted on the licensed carrier which is more reliable than the unlicensed carrier, while the data information is transmitted on the unlicensed carrier. In such a way, the control information can be protected very well by locating it at the more reliable licensed carrier.
  • US patent application publication No. US2015/0098437A discloses a solution for enabling wireless communications using subframe structure having different subframe durations.
  • licensed carrier and unlicensed carrier have a first subframe duration and a second subframe duration respectively; the cross carrier scheduling from licensed carrier to unlicensed carrier is performed; the control information is detected on the licensed carrier and the data information on the unlicensed carrier is decoded.
  • US patent application publication No. 2015/0103777A discloses a solution for downlink control management in an unlicensed or shared spectrum.
  • an evolved Node B eNB
  • UE user equipment
  • a unit of scheduling in the long term evolution (LTE) system is per subframe, while a CCA or LBT duration is about 20us, which means LBT operations can happen many times in a single subframe.
  • the CCS cannot be performed.
  • the control information for data information transmission on the unlicensed carrier shall be decided before the data information transmission but after the control information end boundary, the control information cannot be transmitted.
  • a method for data transmission in a wireless communication system may comprise: detecting a clear channel on an unlicensed carrier for a data transmission; obtaining available time of the detected clear channel for the data transmission; and determining a scheduling mode for the data transmission based on the available time.
  • the scheduling mode may be determined as a cross carrier scheduling if the available time is before a start boundary of a data channel in a subframe to be scheduled.
  • control information for the data transmission may be transmitted in reserved control resource in the subframe.
  • control information for the data transmission may be transmitted in the reserved control resource only if the available time is after a start boundary of a control channel in the subframe.
  • the reserved control resource may be unused time resource in the subframe if the available time is before an end boundary of a control channel in the subframe.
  • the unused time resource in the subframe may be indicated to a terminal device by a Physical Control Format Indicator Channel (PCFICH) indication and a high layer signaling indicating the start boundary of the data channel.
  • PCFICH Physical Control Format Indicator Channel
  • the unused time resource in the subframe may be scheduled only on a part of system bandwidth.
  • the reserved control resource may be unused frequency resource in an enhanced control channel in the subframe, which is indicated to a terminal device through a signaling.
  • the scheduling mode may be determined as a regular cross carrier scheduling if the available time is before a start boundary of the subframe.
  • the scheduling mode may be determined as a self-scheduling if the available time is after a start boundary of a data channel in a subframe to be scheduled.
  • a method of receiving data in a wireless communication system comprises detecting control information on predetermined reserved control resource on a licensed carrier, wherein the control information can be contained on the predetermined reserved control resource; and decoding, based on the detected control information, data information on a corresponding unlicensed carrier.
  • an apparatus for data transmission in a wireless communication system comprises a channel detection module, configured to detect a clear channel on an unlicensed carrier for a data transmission a time obtainment module, configured to obtain available time of the detected clear channel for the data transmission; and a mode determination module, configured to determine a scheduling mode for the data transmission based on the available time.
  • an apparatus of receiving data in a wireless communication system comprises an information detection module, configured to detect control information on predetermined reserved control resource on a licensed carrier, wherein the control information can be contained on the predetermined reserved control resource; and an information decoding module, configured to decode, based on the detected control information, data information on a corresponding unlicensed carrier.
  • a computer-readable storage media with computer program code embodied thereon, the computer program code configured to, when executed, cause an apparatus to perform actions in the method according to any embodiment in the first aspect.
  • a computer-readable storage media with computer program code embodied thereon, the computer program code configured to, when executed, cause an apparatus to perform actions in the method according to any embodiment in the second aspect.
  • a computer program product comprising a computer-readable storage media according to the fifth aspect.
  • a computer program product comprising a computer-readable storage media according to the sixth aspect.
  • the present disclosure provides a new solution for data transmission and receiving, in which the scheduling mode for the data transmission will be selected based on the available time of the clear channel on the unlicensed carrier. In such a way, it is possible to use licensed and unlicensed resource to full advantage and achieve an improved system performance.
  • Fig. 1 schematically illustrates an example LBT operation, wherein the channel on an unlicensed carrier is available after the control information end boundary;
  • Fig. 2 schematically illustrates a flow chart of a method of data transmission in a wireless communication system according to an embodiment of the present disclosure
  • Figs. 3A to 3C schematically illustrates different cases of channel available time according to different embodiments of the present disclosure
  • Fig. 4 schematically illustrates exemplary scheduling modes in different cases of channel available time according to an embodiment of the present disclosure
  • Fig. 5 schematically illustrates an example of reserved control resource according to an embodiment of the present disclosure
  • Fig. 6 schematically illustrates another example of reserved control resource according to an embodiment of the present disclosure
  • Fig. 7 schematically illustrates a flow chart of a method of receiving data in a wireless communication system according to an embodiment of the present disclosure
  • Fig. 8 schematically illustrates different manners of receiving data at a terminal device according to an embodiment of the present disclosure
  • Fig. 9 schematically illustrates a block diagram of an apparatus for data transmission in a wireless communication system according to an embodiment of the present disclosure.
  • Fig. 10 schematically illustrates a block diagram of an apparatus for receiving data in a wireless communication system according to an embodiment of the present disclosure.
  • each block in the flowcharts or blocks may represent a module, a program, or a part of code, which contains one or more executable instructions for performing specified logic functions, and in the present disclosure, a dispensable block is illustrated in a dotted line.
  • these blocks are illustrated in particular sequences for performing the steps of the methods, as a matter of fact, they may not necessarily be performed strictly according to the illustrated sequence. For example, they might be performed in reverse sequence or simultaneously, which is dependent on natures of respective operations.
  • block diagrams and/or each block in the flowcharts and a combination of thereof may be implemented by a dedicated hardware-based system for performing specified functions/operations or by a combination of dedicated hardware and computer instructions.
  • a user equipment may refer to a terminal, a Mobile Terminal (MT) , a Subscriber Station (SS) , a Portable Subscriber Station (PSS) , Mobile Station (MS) , or an Access Terminal (AT) , and some or all of the functions of the UE, the terminal, the MT, the SS, the PSS, the MS,or the AT may be included.
  • MT Mobile Terminal
  • PSS Portable Subscriber Station
  • MS Mobile Station
  • AT Access Terminal
  • BS may represent, e.g., a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a radio header (RH) , a remote radio head (RRH) , a relay, or a low power node such as a femto, a pico, and so on.
  • NodeB or NB node B
  • eNodeB or eNB evolved NodeB
  • RH radio header
  • RRH remote radio head
  • relay or a low power node such as a femto, a pico, and so on.
  • Fig. 1 illustrates an example LBT operation, wherein the channel is available after the control information end boundary.
  • the upper graph illustrates subframes used in Primary cell (Pcell) , i.e., a licensed carrier; and the lower graph illustrates subframes used in Secondary cell (Scell) , i.e., an unlicensed carrier.
  • Pcell Primary cell
  • Scell Secondary cell
  • An LBT is performed on the unlicensed carrier and ends after the control channel end boundary, i.e., the end boundary of Physical Downlink Control Channel (PDCCH) .
  • the LBT’s result shows that the channel is available.
  • the control information cannot be transmitted in PDCCH because the PDCCH is already transmitted and it is also impossible to transmit the control information on the evolved PDCCH (ePDCCH) as well, since the ePDCCH shall occupy the whole subframe duration. Thus, in such a case, it cannot use the unlicensed carrier for data transmission.
  • ePDCCH evolved PDCCH
  • Fig. 2 schematically illustrates a flow chart of a method of data transmission in a wireless communication system according to an embodiment of the present disclosure.
  • a detection of a clear channel on an unlicensed carrier for a data transmission is performed.
  • the LBT is well-known in the art and thus will not be elaborated herein for a purpose of simplification.
  • step S202 available time of the detected clear channel for the data transmission is obtained. If a clear channel is detected at step S201, which means there is an idle channel, it may determine the time from which the channel is available. Or the time that LBT ends is obtained as the available time of the detected clear channel.
  • a scheduling mode for the data transmission can be determined based on the available time.
  • it is to adopt different scheduling modes for different available time. That is to say, it is proposed to select suitable scheduling modes for different available time respectively.
  • the available time can be divided into several different cases. Next, for illustration purposes, reference will be made to Figs. 3A through Fig. 3C to describe example cases of the available time in details.
  • Fig. 3A in which case A is illustrated.
  • the LBT is finished before a subframe to be scheduled starts and the LBT result is “idle” .
  • the clear channel is available before the start boundary of a subframe to be scheduled or the start boundary of the control channel (PDCCH for example) of this subframe.
  • the available time of the clear channel on the unlicensed carrier is also before a start boundary of the data channel (a physical downlink sharing channel (PDSCH) for example) .
  • PDSCH physical downlink sharing channel
  • FIG. 3B illustrates another case, i.e., Case B, in which the LBT is finished after the start boundary of the subframe but before the start boundary of the data channel (PDSCH for example) in the subframe to be scheduled and the LBT result is idle. In this case, the PDCCH is transmitting.
  • Fig. 3C illustrates a further case, in which the LBT is performed after the PDSCH/ePDCCH starts, i.e., after the start boundary of the data channel, which means that the PDSCH/ePDCCH is transmitting.
  • the scheduling mode can be determined as a cross carrier scheduling.
  • the cross carrier scheduling herein means a scheduling solution that transmits the control information and the data information using two different carriers. For example, it may transmit the control information on the licensed carrier and transmit the data information on the unlicensed carrier. In such a case, it may use reserved control resource, which is behind the PDCCH, and used to transmit control information for the data transmission.
  • the reserved control resource herein refers to specific resource in the subframe reserved for transmitting the control information for the data transmission on unlicensed carrier.
  • reserved control resource there are provided different kinds of reserved control resource, which can be used as the resource for the control information transmission in such a case.
  • the example arrangements of reserved control resource will be detailed with reference to Figs. 5 and 6 and will be not elaborated herein.
  • control information for the data transmission can be transmitted in the reserved control resource only if the available time is after a start boundary of a control channel in the subframe to be scheduled (case B in Fig. 3) .
  • the scheduling mode can be determined as a regular cross carrier scheduling, in which the control information will be transmitted using PDCCH.
  • the scheduling mode can be determined as the regular cross carrier scheduling and the PDCCH is used to transmit the control information.
  • the scheduling mode is determined as a self-scheduling.
  • the PDSCH was transmitted and the ePDCCH is transmitting, there is no channel to perform cross carrier scheduling in this subframe. Therefore, it can perform a self-scheduling, which means both the control information and the data information are transmitted on the unlicensed carrier.
  • Fig. 5 illustrates an example of reserved control resource according to an embodiment of the present disclosure, which is unused time resource in the subframe.
  • symbols for PDCCH denoted with blocks filled with dots
  • symbols for the PDSCH denoted with blocks filled with white
  • symbol 2 is unused time resource in the subframe.
  • Physical resource blocks (PRBs) at symbol 2 can be used to carry the control information of the data information transmission on the unlicensed carrier and thus the whole symbol 2 can be occupied.
  • PRBs Physical resource blocks
  • the unused time resource in the subframe can be scheduled only on a part of system bandwidth, which means only some specific PRBs at symbol 2 will be used for the control information transmission instead of occupying the whole system bandwidth. In such way, it is possible to leave more PRB for other purposes. While for legacy UEs, since they cannot interpret the PCFICH and the higher signaling indicating the reserved control resource, the eNB will not schedule the reserved resource.
  • This reserved control resource can be indicated by a specific singling to the terminal device so as to inform the terminal device of the position of the unused symbol.
  • PCFICH Physical Control Format Indicator Channel
  • a Physical Control Format Indicator Channel is used to indicate the legacy PDCCH symbols, from which it can know the symbols for the PDCCH in the subframe. For example, it may indicate the first two symbols, i.e. symbols 0 and 1 are used for the PDCCH as illustrated in Fig. 5.
  • a higher signaling is used to indicate the PDSCH starting point, by means of which it is possible to know the start boundary of the PDSCH, for example symbol 3 as shown in Fig. 5.
  • a terminal device may interpret the PCFICH and the higher layer signaling and learn that the reserved control resource is symbol 2. Besides, if specific PRBs are used, it can use a higher layer signaling to configure these specific PRBs. By this means, the terminal device could obtain the control information on specific PRBs in the symbol 2.
  • Fig. 6 illustrates another example of reserved control resource according to an embodiment of the present disclosure which is unused frequency resource in the subframe to be scheduled.
  • the ePDCCH is another channel for transmitting control information, which occupies the same symbols as the PDSCH in the time domain and a few PRBs in the frequency domain.
  • a specific PRB can be reserved for the control information transmission.
  • the specific PRB is a special frequency resource reserved for control information for data transmission on unlicensed carrier. By means of this specific PRB on symbols lasting during the PDSCH, it is possible to transmit the control information for the data information transmission on the unlicensed carrier.
  • This specific PRB can be indicated to the terminal device through an explicit signaling.
  • the UE can obtain the control information and decode the data information on the unlicensed carrier.
  • these are illustrated for a purpose of illustration and the present disclosure is not limited thereto, it is possible to make modifications to arrangements of the reserved control resource as provided herein.
  • the scheduling mode for the data transmission will be selected based on the available time of the clear channel on the unlicensed carrier. In other words, for different available time, different scheduling mode will be adopted. Particularly, for case A, regular cross carrier scheduling can be performed in which the control information is transmitted using the PDCCH; for case B, in which the cross carrier scheduling cannot be performed according to the existing solution, the control information can be transmitted on reserved control resource; for case C, the self-scheduling may be performed, in which the control information is transmitted on the unlicensed carrier. In such a way, it is possible to use licensed and unlicensed resource to full advantage and achieve an improved system performance.
  • Fig. 7 schematically illustrates a flow chart of a method of receiving data in a wireless communication system according to an embodiment of the present disclosure.
  • control information is detected on predetermined reserved control resource on a licensed carrier.
  • the predetermined reserved control resource is reserved resource for the control information transmission. It could be default reserved control resource which is known by other the eNB or is indicated by the eNB to the terminal device by control information indication message, such as specific signaling.
  • the reserved control resource can be for example resource unused for any other purpose in the subframe.
  • the reserved control resource unused time resource in this subframe which could be indicated by a Physical Control Format Indicator Channel (PCFICH) indication and a high layer signaling indicating a start boundary of a data channel.
  • PCFICH Physical Control Format Indicator Channel
  • the unused time resource can be scheduled only on a part of system bandwidth. In such way, it is possible to leave more PRBs for other purposes.
  • the reserved control resource can also be unused frequency resource in an enhanced control channel. In such a case, it may be indicated to the UE through a signaling.
  • the terminal device may first detect the control information on a control channel of the licensed carrier as step S705. That is to say, the UE first detects the control information on the PDCCH. In a case that no control information is found (N in step S707) , the step S710 will be performed; otherwise, the method may proceed with step S720.
  • step S710 it may determine after step S710 whether the control information is found on the reserved control resource at step S715. If the control information is detected, the method proceeds with step S720; otherwise, the UE detects the control information on an unlicensed carrier.
  • step 720 data information on a corresponding unlicensed carrier is decoded based on the detected control information. Once the control information is detected, the control information can be used to obtain the data information on the unlicensed carrier and decode the data information to obtain the transmitted data information.
  • Fig. 8 illustrates different manners of receiving data at a terminal device according to an embodiment of the present disclosure.
  • the LBT ends before the start boundary of the subframe and the LBT result shows that the channel is idle.
  • the scheduling mode is determined as the regular cross carrier scheduling, and the UE monitors the PDCCH on the Pcell and obtain the control information from the PDCCH, as illustrated in Fig. 8.
  • the LBT ends after the start boundary of the subframe but before the start boundary of the PDSCH and the LBT result shows that the channel is idle.
  • the scheduling mode is determined as the cross carrier scheduling with the reserved control resource and thus the UE monitors the control resource on Pcell including the reserved control resource.
  • the information can be obtained from the reserved time resource between the end boundary of the PDCCH and the start boundary of the PDSCH or from specific PRB on the ePDCCH.
  • the LBT ends after the start boundary of the PDSCH and the LBT result shows that the channel is idle.
  • the scheduling mode is determined as self-scheduling and the UE monitors the PDCCH on Scell.
  • the control information will be obtained from the control channel on the Scell.
  • the UE could obtain the control information and decoding the data information transmitted on the unlicensed carrier.
  • the licensed and unlicensed resource can be used to full advantage and an improved system performance can be achieved.
  • apparatus 900 comprises a channel detection module 910, a time obtainment module 920 and a mode determination module 930.
  • the channel detection module 910 is configured to detect a clear channel on an unlicensed carrier for a data transmission.
  • the time obtainment module 920 is configured to obtain available time of the detected clear channel for the data transmission.
  • the mode determination module 930 is configured to determine a scheduling mode for the data transmission based on the available time.
  • the scheduling mode may be determined as a cross carrier scheduling if the available time is before a start boundary of a data channel in a subframe to be scheduled.
  • control information for the data transmission may be transmitted in reserved control resource in the subframe.
  • the control information for the data transmission may be transmitted in the reserved control resource only if the available time is after a start boundary of a control channel in the subframe.
  • the reserved control resource may be unused time resource in the subframe if the available time is before an end boundary of the control channel.
  • the unused time resource in the subframe is indicated to a terminal device by a Physical Control Format Indicator Channel (PCFICH) indication and a high layer signaling indicating the start boundary of the data channel.
  • PCFICH Physical Control Format Indicator Channel
  • the unused time resource in the subframe can be scheduled only on a part of system bandwidth.
  • the reserved control resource can be unused frequency resource in an enhanced control channel in the subframe, which is indicated to terminal device through a signaling.
  • the scheduling mode can be determined as a regular cross carrier scheduling if the available time is before a start boundary of the subframe. On the other hand, if the available time is after a start boundary of a data channel in a subframe to be scheduled, the scheduling mode can be determined as a self-scheduling. Or alternatively, the eNB can wait until the next subframe so as to transmit the control information on the PDCCH or the reserved control resource
  • apparatus 1000 comprises an information detection module 1010 and an information decoding module 1020.
  • the information detection module 1010 can be configured to detect control information on predetermined reserved control resource on a licensed carrier.
  • the predetermined reserved control resource is resource which could be used to carry the control information for data transmission on the unlicensed carrier, or in other word, the control information could be contained on the predetermined reserved control resource.
  • the information decoding module 1020 can be configured to decode, based on the detected control information, data information on a corresponding unlicensed carrier.
  • the reserved control resource is unused time resource in a subframe.
  • the unused time resource can be indicated for example by a Physical Control Format Indicator Channel (PCFICH) indication and a high layer signaling indicating a start boundary of a data channel.
  • PCFICH Physical Control Format Indicator Channel
  • the unused time resource can be indicated by a dedicated signaling.
  • the unused time resource is particularly scheduled only on a part of system bandwidth. By this means, it is possible to meet the requirement of control information transmission and at the same time leave more resource for other purposes.
  • the reserved control resource is unused frequency resource in an enhanced control channel, which is indicated through a signaling.
  • the information detection module 1010 can be further configured to detect the control information on a control channel of the licensed carrier. In such a case, the information detection module 1010 is configured to detect the control information on the predetermined reserved control resource in response to failing to detect the control information on the control channel of the licensed carrier.
  • the information detection module 1010 can be further configured to detect the control information on an unlicensed carrier in response to failing to detect the control information on the predetermined reserved control resource.
  • the apparatuses 900 and 1000 are described with reference to Figs. 9 and 10. It is noted that the apparatuses 900 and 1000 may be configured to implement functionalities as described with reference to Figs. 1 to 8. Therefore, for details about the operations of modules in these apparatuses, one may refer to those descriptions made with respect to the respective steps of the methods with reference to Figs. 1 to 8.
  • the components of the apparatuses 900 and 1000 may be embodied in hardware, software, firmware, and/or any combination thereof.
  • the components of apparatuses 900 and 1000 may be respectively implemented by a circuit, a processor or any other appropriate selection device.
  • Those skilled in the art will appreciate that the aforesaid examples are only for illustration not limitation.
  • apparatuses 900 and 1000 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.
  • Apparatuses 900 and 1000 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 apparatuses 900 and 1000 to at least perform operations according to the method as discussed with reference to Figs. 1 to 8 respectively.
  • the above-mentioned solutions can be used in both an initial data transmission and a data retransmission. That is to say, either of the initial data transmission and the data retransmission can be cross scheduled.
  • the data retransmission can also be performed on a different carrier from the initial data transmission, and different data retransmissions can be performed on different carriers as well, which may be called as cross carrier Hybrid Automatic Repeat reQuest (HARQ) .
  • HARQ cross carrier Hybrid Automatic Repeat reQuest
  • the terminal device shall have the capability of the cross carrier HARQ, which means if the terminal device does not have the capability, the cross carrier HARQ cannot be performed between the terminal device and eNB. In such case, if the terminal device can support this feature, i.e. receiving different transmissions for same data on different carriers, it could use a specific signaling to inform the eNB.
  • a method for data transmission in a wireless communication comprises performing a first transmission for data on a first carrier, and performing a second transmission for the data on a second first carrier which is different from the first carrier.
  • the method is performed in response to a signaling from a terminal device to which the data is to be transmitted, wherein the signaling indicates that the terminal device supports different transmissions for the data on different carriers.
  • a method of data receiving in a wireless communication comprises transmitting a signaling to a serving node to indicate the supporting of different transmissions for a data on different carriers; receiving a data in a first transmission on a first carrier and receiving the data in a second transmission on a second carrier which is different from the first carrier.
  • an apparatus for data transmission in a wireless communication comprises a data transmission module, configured to perform a first transmission for data on a first carrier, and perform a second transmission for the data on a second carrier which is different from the first carrier.
  • the transmission module is configured to perform the transmission in response to a signaling from a terminal device to which the data is to be transmitted, wherein the signaling indicates that the terminal device supports different transmissions for the data on different carriers.
  • an apparatus of data receiving in a wireless communication comprises a signaling transmission module, configured to transmit a signaling to a serving node to indicate the supporting of different transmissions for a data on different carriers; a data receiving module, configured to receive a data in a first transmission on a first carrier and receive the data in a second transmission on a second carrier which is different from the first carrier.
  • 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.
  • the various blocks shown in the companying drawings 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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  • Mobile Radio Communication Systems (AREA)

Abstract

Certains modes de réalisation de la présente invention concernent un procédé et un appareil de transmission de données dans un système de communication sans fil et un procédé et un appareil de réception de données dans un système de communication sans fil. Le procédé de transmission de données consiste à détecter un canal libre sur une porteuse non autorisée à des fins de transmission de données; à obtenir un temps disponible du canal libre détecté pour la transmission de données; et à déterminer un mode d'ordonnancement pour la transmission de données sur la base du temps disponible. Selon les modes de réalisation, la présente invention fournit une nouvelle solution de transmission et de réception de données, selon laquelle le mode d'ordonnancement de la transmission de données sera sélectionné sur la base du temps disponible du canal libre sur la porteuse non autorisée. Il est de cette manière possible d'utiliser une ressource autorisée et une ressource non autorisée pour obtenir une performance de système améliorée ainsi que d'en tirer pleinement avantage.
PCT/CN2015/078960 2015-05-14 2015-05-14 Procédés et appareils de transmission et de réception de données dans un système de communication sans-fil WO2016179831A1 (fr)

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CN108289335A (zh) * 2017-01-10 2018-07-17 中兴通讯股份有限公司 数据发送方法及装置、终端
WO2019076170A1 (fr) * 2017-10-20 2019-04-25 维沃移动通信有限公司 Procédé de transmission d'informations dans une bande sans licence, et dispositif de réseau et terminal
CN110012540A (zh) * 2018-01-05 2019-07-12 上海朗帛通信技术有限公司 一种被用于无线通信的用户设备、基站中的方法和装置
WO2020030181A1 (fr) * 2018-08-10 2020-02-13 Mediatek Inc. Utilisation de canal dans un spectre sans licence

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CN103370896A (zh) * 2010-12-06 2013-10-23 交互数字专利控股公司 用于在免许可频谱中使能无线操作的方法
CN103765824A (zh) * 2011-07-14 2014-04-30 美国博通公司 用于在系统的未许可频带上提供灵活时间共享方案的方法和装置
US20150049715A1 (en) * 2013-08-19 2015-02-19 Qualcomm Incorporated Subframe staggering across component carriers in an unlicensed or shared spectrum

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CN103370896A (zh) * 2010-12-06 2013-10-23 交互数字专利控股公司 用于在免许可频谱中使能无线操作的方法
CN103765824A (zh) * 2011-07-14 2014-04-30 美国博通公司 用于在系统的未许可频带上提供灵活时间共享方案的方法和装置
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108289335A (zh) * 2017-01-10 2018-07-17 中兴通讯股份有限公司 数据发送方法及装置、终端
WO2018130081A1 (fr) * 2017-01-10 2018-07-19 中兴通讯股份有限公司 Procédé et dispositif de transmission de données, et terminal
CN108289335B (zh) * 2017-01-10 2023-07-14 中兴通讯股份有限公司 数据发送方法及装置、终端
WO2019076170A1 (fr) * 2017-10-20 2019-04-25 维沃移动通信有限公司 Procédé de transmission d'informations dans une bande sans licence, et dispositif de réseau et terminal
CN110012540A (zh) * 2018-01-05 2019-07-12 上海朗帛通信技术有限公司 一种被用于无线通信的用户设备、基站中的方法和装置
CN110012540B (zh) * 2018-01-05 2023-04-07 上海朗帛通信技术有限公司 一种被用于无线通信的用户设备、基站中的方法和装置
WO2020030181A1 (fr) * 2018-08-10 2020-02-13 Mediatek Inc. Utilisation de canal dans un spectre sans licence
US11057780B2 (en) 2018-08-10 2021-07-06 Mediatek Inc. Channel utilization in unlicensed spectrum

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